Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed are tooling and a method for using same. The tooling comprises supporting parts (11, 12) capable of supporting a piece to be assembled; pre-hung parts (21, 22) capable of making the tooling in a first target position; and locking parts (31, 32) capable of making a target state between the supporting parts and the pre-hung parts, and where the supporting parts and the pre-hung parts are in the target state, the piece to be assembled is in a second target position. The tooling can not only release both hands of operating personnel, but can also more stably hold a piece to be assembled at an assembly station, thereby greatly improving the convenience for a piece to be assembled in the assembly process.
A: A mounting kit (1) comprises a sleeve (10) and a pushing member (20). The sleeve (10) has a guide channel (101). Two ends of the sleeve (10) respectively have a first opening (103) and a second opening (104). The diameter of the first opening (103) is greater than the diameter of the second opening (104). An inner diameter of the guide channel (101) gradually decreases in a direction extending from the first opening (103) to the second opening (104). Two ends of the pushing member (20) are respectively a pushing portion (22) and a force application portion (21). The maximum radial width of the pushing portion (22) is less than the diameter of the second opening (104). When the force application portion (21) is subjected to external force, the pushing portion (22) pushes a C-shaped buckle provided in the guide channel (101), such that the C-shaped buckle is pressed by a side wall forming the guide channel (101), and leaves the sleeve (10) by means of the second opening (104) to enter a mounting recess of a member to be mounted. The mounting kit allows a user to quickly and conveniently mount the C-shaped buckle in the mounting recess of the member to be mounted.
B: A hood lock positioning tool, comprising a main body frame (1), and a hood lock positioning mechanism and tool positioning mechanism connected to the main body frame. The hood lock positioning mechanism is for positioning a hood lock to be installed at an installation position and comprises a hood lock positioning installation block (21) having a positioning recess capable of enabling hood lock attachment. The tool positioning mechanism is for fixing the hood lock positioning tool at a corresponding position on a vehicle, and comprises a plurality of positioning pins (11, 12) capable of moving along an axial direction and being inserted in a corresponding positioning hole on a vehicle. The positioning tool resolves the problem of an existing hood lock, which requires multiple position adjustments when being installed at a vehicle.
C: An identification locking device, comprising: a mounting member (1), wherein the mounting member (1) is provided with: a moving part (11), an identification member (4) being connected to a gauge changing device, and the identification member (4) and the mounting member (1) being movably connected to each other via the moving part (11), and a locking groove (12), the locking groove (12) intersecting with the moving part (11); a connecting assembly (2), wherein the connecting assembly (2) comprises a first connecting member (21), the first connecting member (21) passing through the locking groove (12), and the first connecting member (21) being connected to the mounting member (1); and a locking assembly (3), wherein the locking assembly (3) is positioned in the locking groove (12), and the locking assembly (3) is provided with: a guide groove, the first connecting member (21) passing through the guide groove and being in guide-connection with the guide groove, and a first spring leaf (33), the first spring leaf (33) being provided with a first protrusion (331) and a second protrusion (332) which are oppositely arranged, wherein an opening part (333) arranged in a guide direction of the guide groove is formed between the first protrusion (331) and the second protrusion (332), the opening part (333) is arranged corresponding to the first connecting member (21), the size of the opening part (333) is smaller than that of the first connecting member (21), the first spring leaf (33) and the first connecting member (21) have a first state and a second state, and in the first state, the locking assembly (3) limits the action of the identification member (4), and in the second state, the locking assembly (3) does not limit the action of the identification member (4). Further disclosed are a variable gauge brake clamp unit comprising the identification locking device, and a rail vehicle comprising the variable gauge brake clamp unit. When the identification locking device is in a locked state, the identification member (4) can be prevented from falling off of same, the brake clamp unit can be ensured to move along with wheels, and hard collisions between the wheels and the brake clamp unit are prevented; and when the identification locking device is in an unlocked state, the identification member (4) can be detached from the gauge changing device, so as to facilitate the detachment and replacement of the identification member (4).
D: A horizontal roll coater set and a roll changing method therefor. A roll coater comprises a frame (1), an upper coating head trolley (21), an upper coating head (22) mounted on the upper coating head trolley (21), a lower coating head trolley (31), and a lower coating head (32) mounted on the lower coating head trolley (31). A roll changing device is are arranged beside an upper trolley track. The roll changing device comprises at least one group of supporting arm roll changing mechanisms. Each supporting arm roll changing mechanism comprises a supporting arm (61) and a supporting arm driving unit. The supporting arm (61) is provided with a supporting part for supporting and protecting an upper coating roll. The supporting arm driving unit drives the supporting arm (61) to move between a roll changing position and a standby position; and at the roll changing position, the supporting part supports an old roll or causes a new roll to be at a target position. The roll changing method effectively reduces the difficulty of upper coating roll changing by maintenance personnel, thus reducing the workload of maintenance personnel and shortening an operation time.
Answer: B