Patent Publication Number: US-11020790-B2

Title: Manual rivet tool

Description:
FIELD OF THE INVENTION 
     The present invention relates to a quick rivet tool, in particular to a manual rivet tool. 
     DESCRIPTION OF THE RELATED ART 
     The wide application of blind rivets and rivet nuts proposes a new demand for a tool matching therewith. The tool shall be simple, light, convenient and labor saving in use. 
     The traditional manual rivet tools in the market are large in size and laborious in operation. The pneumatic rivet tools need compressed air as the power, thus affecting the scope of application. The electric rivet tools have complex structure and a lot of parts, which is prone to failure. The electric rivet tools are subject to the power of a motor and cannot be used to rivet large parts to be riveted (blind rivets or rivet nuts). The electric rivet tool requires charging the batter due to the battery capacity constraints, and cannot operate normally at low temperature. 
     In addition, the traditional rivet tool tip has a single color regardless of the size, and it is thus difficult to identify the size of the tip, thereby causing inconvenience in use. 
     SUMMARY OF THE INVENTION 
     With regard to the shortcomings above in the prior art, the Applicant puts forwards a manual rivet tool capable of solving the current problems of the manual rivet tool in the market such as large size and laborious operation. 
     The present application uses the following technical means for achieving the technical purposes above: 
     A manual rivet tool comprises: a first handle assembly, a second handle assembly, a force amplification pulling mechanism, a planetary accelerating rotating mechanism and a quick replacement mechanism; the first handle assembly is fixed to the force amplification pulling mechanism; the second handle assembly is disposed on the force amplification pulling mechanism; the first handle assembly and the second handle assembly act on the force amplification pulling mechanism cooperatively to drive the force amplification pulling mechanism to output a pulling force; a threaded brace rod is fixed to the end of the force amplification pulling mechanism through the quick replacement mechanism, and the force amplification pulling mechanism outputs the pulling force to the threaded brace rod to act on a rivet nut; and the planetary accelerating rotating mechanism is engaged on the upper end of the force amplification pulling mechanism, and the planetary accelerating rotating mechanism drives the threaded brace rod to rotate rapidly by means of the force amplification pulling mechanism. 
     Preferably, the force amplification pulling mechanism comprises: a pull rod, a nut being disposed on the upper part thereof, the upper end of the pull rod being engaged with the planetary accelerating rotating mechanism, and the lower end of the pull rod being connected to the quick replacement mechanism; a ball screw, sleeved on the outer side of the pull rod and having the upper end surface in contact with the lower end surface of the nut, the upper end of the ball screw being provided with a thread sleeve and being in contact with the first handle assembly through the thread sleeve, and the lower end of the ball screw abutting against the quick replacement mechanism; a ball nut, sleeved outside the ball screw, and a ball being provided between the ball nut and the ball screw; a ratchet, disposed on the outer side of the ball nut and being in clamp connection with the ball nut, the second handle assembly being disposed on the ratchet; a housing with hollow interior, the upper end of the housing being connected to the planetary accelerating rotating mechanism through bolt fixing, the housing being sleeved on the upper segment of the ball nut, and the upper end surface of the housing being connected to the lower end surface of the first handle assembly; and a tip base, sleeved on the lower segment of the ball nut, the upper end of the tip base being connected to the lower end surface of the ratchet, the bottom of the tip base being connected with a tip through a locking nut, a step internal hole being disposed in the tip base, a step surface of the step internal hole limiting the bottom end of the ball screw, a thrust bearing being disposed between the ball nut and the step surface, and an internal hole below the step surface being sleeved on the quick replacement mechanism. 
     Preferably, a sun gear is disposed on the upper end of the pull rod, and the sun gear is engaged with the planetary accelerating rotating mechanism. 
     Preferably, a cord is disposed on the outer side surface of the ball nut, a slot corresponding to the cord is disposed on the inner surface of the ratchet, and the cord is confined in the slot. 
     Preferably, the housing is composed of a scale ring, a display cover and a damping ring; the upper end of the display cover is fixed to the first handle assembly through the bolt, and the display cover is in an inverted L shape; the damping ring is sleeved on the ball nut and the damping ring is located between the display cover and the ball nut; the scale ring is sleeved on the ball nut and located below the damping ring, the outer surface of the scale ring is provided with a tick mark and a corresponding figure, and the display cover may move up and down with respect to the tick mark. 
     Preferably, a distinctive mark is disposed on the tip, and the distinctive mark is in one-to-one correspondence with each type of the threaded brace rod so as to directly distinguish each type of threaded brace rod. 
     Preferably, the quick replacement mechanism comprises a reset spring and a replacement sleeve; the reset spring is sleeved on the bottom end of the pull rod, and the upper end of the reset spring abuts against the bottom end of the ball screw; one end of the replacement sleeve is sleeved on the pull rod and the other end thereof is sleeved and connected to the threaded brace rod; and both the threaded brace rod and the pull rod are provided with connecting ends corresponding to the replacement sleeve. 
     Preferably, the planetary accelerating rotating mechanism comprises a knob, a knob base, an internal gear, an internal gear base, a planetary gear base and three planetary gears mounted on the planetary gear base, wherein the internal gear is disposed in the internal gear base, the internal gear base is sleeved on the knob base, and the knob base is fixed to the force amplification pulling mechanism by means of the bolt; the planetary gear base is mounted in the middle of the internal gear base, the three planetary gears mounted on the planetary gear base are simultaneously engaged with the internal gear and the sun gear on the pull rod, and the knob is connected to the planetary gear base. 
     Preferably, the second handle assembly comprises a second handle bar, a pawl spring, a steel ball and a ratchet pawl; the front end of the second handle bar is provided with an inner hole, the pawl spring is disposed at the innermost side of the inner hole, the steel ball abuts against the ratchet pawl under the elastic force of the pawl spring, and the ratchet pawl clings to the ratchet under the action of the steel ball and catches teeth of the ratchet. 
     With the technical means above, the present application may complete manual riveting efficiently, and the tool is light in structure, convenient to carry, strong in pulling force, labor saving in operation and high in working efficiency. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a profile of an embodiment according to the present application; and 
         FIG. 2  is a top view of an embodiment according to the present application. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The technical solution of the present invention will be further described in detail in combination with embodiments and drawings. 
       FIG. 1  and  FIG. 2  are a profile and a top view of an embodiment according to the present application. A manual rivet tool in the present embodiment comprises a first handle assembly  10 , a second handle assembly  18 , a force amplification pulling mechanism, a planetary accelerating rotating mechanism and a quick replacement mechanism. 
     The first handle assembly  10  is fixed to the force amplification pulling mechanism. The second handle assembly  18  is disposed on the force amplification pulling mechanism. The first handle assembly  10  and the second handle assembly  18  act on the force amplification pulling mechanism cooperatively to drive the force amplification pulling mechanism to output a pulling force. The cooperation is that the first handle assembly  10  is fixed as a fixed point of force application, while the second handle assembly  18  rotates with respect to the first handle assembly  10 . 
     A threaded brace rod  1  is fixed to the end of the force amplification pulling mechanism through the quick replacement mechanism, and the force amplification pulling mechanism outputs the pulling force to the threaded brace rod  1  to act on a rivet nut. The planetary accelerating rotating mechanism is engaged on the upper end of the force amplification pulling mechanism, and the planetary accelerating rotating mechanism drives the threaded brace rod to rotate rapidly by means of the force amplification pulling mechanism. 
     Various parts will be described as follows in detail by referring to  FIG. 1 . 
     The force amplification pulling mechanism comprises a pull rod  25 , a ball screw  8 , a ball nut  14 , a ball  27 , a ratchet  28 , a housing and a tip base  4 . 
     As shown in  FIG. 1 , a nut  26  is disposed on the upper part of the pull rod  25 , the upper end of the pull rod  25  is provided with a sun gear, and the sun gear is engaged with the planetary accelerating rotating mechanism. The pull rod  25 , driven by the planetary accelerating rotating mechanism, may realize accelerating rotation. The lower end of the pull rod  25  is connected to the quick replacement mechanism and is connected to a threaded brace rod  1  by means of the quick replacement mechanism. 
     The ball screw  8  is sleeved on the outer side of the pull rod  25 , the upper end surface of the ball screw  8  is in contact with the lower end surface of the nut  26  and is used for transmitting the pulling force of the ball screw  8  in the pulling direction. The upper end of the ball screw  8  is provided with a hex thread sleeve  9  and is connected to the first handle assembly  10  through the hex thread sleeve  9 , and the first handle assembly  10  cannot rotate. The lower end of the ball screw  8  abuts against the quick replacement mechanism. 
     The ball nut  14  is sleeved outside the ball screw  8 , and a ball  27  is provided between the ball nut  14  and the ball screw  8 . A cord  141  is disposed on the outer side surface of the ball nut  14 . 
     The ratchet  28  is disposed on the outer side of the ball nut  14 . A slot corresponding to the cord  141  is disposed on the inner surface of the ratchet  28 , and the cord  141  is confined in the slot. The second handle assembly  18  is disposed on the ratchet  28 . 
     The interior of the housing is hollow, and the upper end of the housing is connected to the planetary accelerating rotating mechanism through bolt fixing. In the present embodiment, the housing is composed of a scale ring  11 , a display cover  12  and a damping ring  13 . As shown in  FIG. 1 , the upper end of the display cover  12  is fixed to the first handle assembly  10  through the bolt  29 , and the display cover  12  is in an inverted L shape. The damping ring  13  is sleeved on the ball nut  14  and the damping ring  13  is located between the display cover  12  and the ball nut  14 . The scale ring  11  is sleeved on the ball nut  14  and located below the damping ring  13 , the outer surface of the scale ring  11  is provided with a tick mark and a corresponding figure, and the display cover  12  may spiral up and down with respect to the tick mark. The outer surface of the scale ring  11  is provided with a tick mark and a corresponding figure, and the movement distance of the threaded brace rod  1  with respect to the tip  2  may be learnt from the position of the display cover  12  with respect to the tick mark  11 . In addition, the damping ring  13  is pressed in the display cover  12 , and the clamping force of the damping ring  13  prevents the ball screw  8  from going backwards while the first handle assembly  10  and the second handle assembly  18  are pulled out. 
     The tip base  4  is sleeved on the lower segment of the ball nut  14 , the upper end of the tip base  4  is connected to the lower end surface of the ratchet  28 , and the bottom of the tip base  4  is connected with a tip  2  through a locking nut  3 . A step internal hole is disposed in the tip base  4 , a step surface of the step internal hole limits the bottom end of the ball screw  8 , and a thrust bearing  7  is disposed between the ball nut  14  and the step surface. An internal hole below the step surface is sleeved on the quick replacement mechanism. 
     A distinctive mark is disposed on the tip  2 , and the distinctive mark is in one-to-one correspondence with each type of the threaded brace rod so as to directly distinguish each type of threaded brace rod. The distinctive mark may be color. For example, tips with different color are set, and each color corresponds to a type, which is convenient to quickly identify the size of a tip. 
     As shown in  FIG. 1  and  FIG. 2 , the second handle assembly  18  comprises a second handle bar  181 , a pawl spring  17 , a steel ball  16  and a ratchet paw  15 . The front end of the second handle bar  181  is provided with an inner hole, and the pawl spring  17  is disposed at the innermost side of the inner hole. The steel ball  16  abuts against the ratchet pawl  15  under the elastic force of the pawl spring  17 , and the ratchet pawl  15  clings to the ratchet  28  under the action of the steel ball  16  and catches teeth of the ratchet  28 . 
     The first handle assembly  10  and the second handle assembly  18  are pushed, and the second handle assembly  18  pushes the ball nut  14  through the ratchet pawl  15  to rotate (the ratchet pawl  15  is shifted as needed to rotate the ball nut  14  forward or backward). The ball screw  8  moves in the pulling direction to output a pulling force in the pulling direction and transmit the pulling force to the threaded brace rod  1  through the pull rod  25 . The pulling force acts on the threaded brace rod  1  and clings to the rivet nut on the tip  2 , thus deforming the rivet nut till the completion of riveting. 
     As shown in  FIG. 1 , the quick replacement mechanism comprises a reset spring  6  and a replacement sleeve  5 . The reset spring  6  is sleeved on the bottom end of the pull rod  25 , and the upper end of the reset spring  6  abuts against the bottom end of the ball screw  8 . One end of the replacement sleeve  5  is sleeved on the pull rod  25  and the other end thereof is sleeved and connected to the threaded brace rod  1 . The replacement sleeve  5  is provided with an inner hexagonal hole thereon, and both the threaded brace rod  1  and the pull rod  25  are provided with connecting ends corresponding to the replacement sleeve, that is, outer hexagons. The replacement sleeve  5  is pushed to disengage the hexagon of the threaded brace cord  1  from the inner hexagonal hole of the replacement sleeve  5 , and it is thus possible to replace the threaded brace rod  1  quickly and conveniently. 
     The planetary accelerating rotating system comprises a knob  19 , a knob base  20 , an internal gear  21 , an internal gear base  22 , a planetary gear base  23  and three planetary gears  24  mounted on the planetary gear base  23 . The internal gear  21  is disposed in the internal gear base  22 , the internal gear base  22  is sleeved on the knob base  20 , and the planetary gear base  23  is mounted in the middle of the internal gear base  22 . The three planetary gears  24  mounted on the planetary gear base  23  are simultaneously engaged with the internal gear  21  and the sun gear on the pull rod  25 , and the knob  19  is connected to the planetary gear base  23 . The knob  19  is rotated to drive the planetary gear base  23  to rotate. The speed-changing effect of a planetary gear train enables the pull rod  25  provided with a gear to drive the threaded brace rod  1  (clockwise or anticlockwise) so as to quickly rotate at a speed several times the rotation speed of the knob  19 , which may quickly assemble or disassemble a rivet nut on the threaded brace rod  1  of the tool. 
     Such embodiments are only used to describe the present utility model but not limit the scope thereof. Any equal changes and modifications made to the present invention by a person skilled in the art shall fall into the scope of claims attached to the present invention.