Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a numerically controlled veneer lathe without a chucking shaft, the veneer lathe comprising a machine base (1), a veneer cutting knife device (2), a single-roller device (3), a double-roller device (4) and a PLC variable-frequency control system (5), wherein a plate pressure scale device (6) is arranged between the veneer cutting knife device (2) and the single-roller device (3); a fixing frame (7) is arranged at an upper end of the machine base (1) at two ends of the veneer cutting knife device (2); the fixing frame (7) is provided with a knife rest body rotating sleeve, a beveled track and a single-roller feed transmission device; an inner side of the fixing frame (7) is provided with a pressure scale slideway (11); a front portion of the veneer cutting knife device (2) is connected to the knife rest body rotating sleeve (12), and a rear portion of the veneer cutting knife device (2) is hinged to a power transmission shaft (13); two ends of the single-roller device (3) are respectively connected to the beveled track (17); and a single-roller support (16) is connected to the single-roller feed transmission device.
A: A rotary cutting machine using automatic stepless shifting of a cam to change rotary cutting veneer thickness. A double-row roller assembly, a double-row roller feeding assembly, and a cutter body base (5) are installed on a rack. The double-row roller feeding assembly is used for driving the double-row roller assembly to move towards or away from the cutter body base (5). A support arm (8) is hinged by means of a support shaft (7) to the cutter body base (5) at an end near the double-row roller assembly. A cam assembly is provided on the cutter body base (5) at an end away from the double-row roller assembly. The cam assembly drives the support arm (8) to rotate. A single-row roller press assembly is provided on the support arm (8). A locking adjustment assembly adjusts the position of the single-row roller press assembly on the support arm (8). A rotary cutter (6) is mounted on the upper portion of the end of the cutter body base (5) near the double-row roller assembly. The double-row roller assembly, the double-row roller feeding assembly, the single-row roller press assembly and the cam assembly are all connected to a controller. The present device achieves intelligent, precise, and automatic change of any rotary cutting thickness, and the cutter height and cutter gap are locked by one-time benchmark locking, thereby saving labor and time.
B: A turning center feed transmission device, mainly composed of a ball screw a (1), a brake pedal (2), a cutter frame (3), a carriage (4), a synchronous toothed belt a (5), an AC servo motor a (6), a synchronous toothed belt b (7), an AC servo motor b (8) and a ball screw b (9); the carriage (4) being provided on the lower rear side of the brake pedal (2), the brake pedal (2) being provided with the ball screw a (1), the cutter frame (3) being provided on the left side of the brake pedal (2), the AC servo motor a (6) being provided on the upper right side of the brake pedal (2), the ball screw a (1) and the AC servo motor a (6) being connected by means of the synchronous toothed belt a (5), the ball screw b (9) being connected to the lower portion of the brake pedal (2), the AC servo motor b (8) being provided on the lower left side of the ball screw b (9), and the AC servo motor b (8) and the ball screw b (9) being connected by means of the synchronous toothed belt b (7). Said transmission device has the advantages of high precision, efficiency, practicability, simplified mechanical structure, being easy to manufacture, relatively low cost, being easy to operate and user-friendly, and good manufacturability.
C: An oil pumping machine with a gear reciprocating on a rack comprises a machine seat (1), a machine body (2), overhead traveling cranes (3, 4), a steel wire rope (5), a motor (6), a speed reducer (8), a gear (9), and a rack (11). A rack seat (12) is fixed on an inner side of a front portion of the machine body (2). The gear rack (11) is fixed on the gear seat (12). Semicircle rails (13) are arranged at an upper portion and a lower portion of the rack seat (12), and a middle rail is an interval rail (14). A running rail for a reciprocating device (15) is arranged at two sides of an inner side of the machine body (2). Horizontal strengthening wheels (17) and longitudinal strengthening wheels (18) are mounted at four corners of the reciprocating device (15) and are connected to a pendulous device (16) through swing rings (20). The speed reducer (8) is mounted at a bottom portion of the pendulous device (16). The motor (6) and an angle transmission case (7) are mounted at a two-layer platform of the pendulous device (16). Chain wheels are mounted on shafts of the angle transmission case (7) and the speed reducer (8). A cable box (22) is mounted at a rear portion in the machine body (2). A cable door (23) is arranged in the middle of the cable box (22). The overhead traveling cranes (3, 4) are mounted at an upper portion of the machine body (2). The steel wire rope (5) is connected to a weight box (24) through the rear portion of the overhead traveling cranes (3, 4). The weight box (24) is arranged outside the machine body (2). The present invention is novel in structure, reliable in running, and capable of reducing the cost of the equipment.
D: A feed transmission device for a turning center, mainly consisting of a ball screw a (1), a brake pedal (2), a knife rest (3), a carriage (4), a synchronous cog belt a (5), an AC servo motor a (6), a synchronous cog belt b (7), an AC servo motor b (8), and a ball screw b (9). The carriage (4) is disposed at the rear underside of the brake pedal (2); the ball screw a (1) is disposed on the brake pedal (2); the knife rest (3) is disposed at the left side of the brake pedal (2); the AC servo motor a (6) is disposed above the right side of the brake pedal (2); the ball screw a (1) and the AC servo motor a (6) are connected by means of the synchronous cog belt a (5); the ball screw b (9) is connected under the brake pedal (2); the AC servo motor b (8) is disposed at the left underside of the ball screw b (9); and the AC servo motor b (8) is connected to the ball screw b (9) by means of the synchronous cog belt b (7). The transmission device has the advantages of precision, high efficiency, practical use, greatly simplified mechanical structure, more easy manufacturing and relatively low cost, and of being easy in operation, man-beneficial, and good in processing manufacturability.
Answer: A