Self-adaptive positioning clamp suitable for auxiliary frames of multiple vehicle types

Abstract

The invention relates to the technical field of frame clamps, in particular to a self-adaptive positioning clamp suitable for auxiliary frames of multiple vehicle types, which comprises a base, a plurality of clamping seats and a control piece. Each clamping seat comprises a base, two clamping pieces, two transmission pieces and a clamping elastic piece, the base is fixedly connected to the base, a positioning groove is formed in the base, the clamping pieces are symmetrically installed on the base relative to the positioning groove, one end of each transmission piece is connected with the corresponding clamping piece, and the other end of each transmission piece is connected with the corresponding clamping elastic piece. The control part comprises a driving part, reset parts and a connecting part, the driving part is fixedly connected to the base, the reset parts are installed on the base in a one-to-one correspondence mode, the reset parts and the driving part are connected through the connecting part, and the reset parts abut against the transmission part. The two clamping pieces are controlled to be close to each other towards the interior of the positioning groove through driving of the clamping elastic piece, and the device is more suitable for radians of the middles of different auxiliary frames. The auxiliary frame clamping device has the effect that auxiliary frames of different shapes can be conveniently clamped.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a frame clamp, in particular to a self-adaptive positioning clamp suitable for a subframe of multiple vehicle models. BACKGROUND

[0002] In the production and manufacturing process of an automobile front subframe, especially in the welding or assembly link, a specially designed front subframe welding or assembly clamp must be used. The core function of the clamp is to accurately position and reliably fix each stamping part or pipe, so as to ensure that they maintain the correct positional relationship and geometric dimensions during welding or connection.

[0003] At present, the front subframe clamp with the announcement number CN222589522U comprises a bottom plate, the top of the bottom plate is fixedly connected with a vertical plate, the front side of the vertical plate is provided with a front subframe, the top and the bottom of the front subframe are provided with clamping plates, the top and the top of the front side of the vertical plate are provided with sliding grooves, and the rear side of the clamping plate is fixedly connected with a transmission rod. The gear and the toothed belt are rotated by the motor, the control disc is rotated by the cooperation of the gear and the toothed belt, the transmission rod is moved away from the gear side by the control disc, the clamping plate is moved away from the front subframe side by the transmission rod, the front subframe is separated from the clamping plate, the front subframe loses positioning, and can be taken off from the surface of the vertical plate. When installing, the above dismounting steps are operated in reverse, and the advantages of automatic opening and closing control are achieved.

[0004] According to the related technology in the above, the vertical plate is fixedly connected to the bottom plate, the subframe is limited by the vertical plate, and then the clamping plate is used for clamping. Different subframes of different vehicle models have different shapes, and the middle part of the subframe has different radii on the special-shaped subframe, so that the middle part of the subframe is not in the central position. During the clamping process of the clamping plate, the two sides are synchronously moved, so that only the middle part of the central subframe can be clamped. The vertical plate fixedly connected to the bottom plate and the synchronously moved clamping plate are difficult to position the subframes with different shapes, so that the adaptability of the clamp is low. SUMMARY

[0005] In order to facilitate clamping of subframes with different shapes and improve the adaptability of the positioning clamp, the application provides a self-adaptive positioning clamp suitable for a subframe of multiple vehicle models.

[0006] The self-adaptive positioning clamp suitable for a subframe of multiple vehicle models provided by the application adopts the following technical scheme: A self-adaptive positioning clamp suitable for a subframe of multiple vehicle models comprises: a base; A plurality of clamping seats are distributed on the base, and positions of the clamping seats correspond to a contour of the auxiliary frame. Each of the clamping seats comprises a base, two clamping pieces, two transmission pieces and a clamping elastic piece. The base is fixedly connected to the base. A positioning groove is formed in the base. The clamping pieces are symmetrically installed on the base with respect to the positioning groove. The transmission pieces are symmetrically installed on the base with respect to the positioning groove. The transmission pieces and the clamping pieces are one-to-one correspondingly arranged. One end of each of the transmission pieces is connected to the clamping piece, and the other end is connected to the clamping elastic piece. The clamping elastic piece drives the clamping piece to move towards the inside of the positioning groove through the transmission piece. The control piece comprises a driving piece, a reset piece and a connecting piece. The driving piece is fixedly connected to the base. The reset piece is one-to-one correspondingly installed on the base. The connecting piece connects the reset piece and the driving piece. The reset piece abuts against the transmission piece, so that the transmission piece drives the clamping piece to move away from the inside of the positioning groove.

[0007] By using the above technical scheme, the driving piece drives the reset piece to move through the connecting piece. The reset piece drives the transmission piece to drive the clamping piece to open through the clamping elastic piece. Then, the auxiliary frame is placed in the positioning groove. The driving piece controls the reset piece to retract through the connecting piece to release the abutment of the transmission piece. At this time, the transmission piece drives the clamping piece to move towards the inside of the positioning groove through the clamping elastic piece, so as to clamp the auxiliary frame.

[0008] The plurality of clamping seats clamp the auxiliary frame at the same time, so that more sizes of the auxiliary frame can be adapted. Since the two clamping pieces on the same base are driven by the same elastic piece, when the auxiliary frame is located close to one side of the clamping piece in the positioning groove, the clamping piece close to one side first abuts against the auxiliary frame, and the clamping elastic piece drives the clamping piece on the other side to continue to abut against the auxiliary frame, so as to clamp the auxiliary frame in the positioning groove. Therefore, no matter how the curvature of the middle part of the auxiliary frame is, the clamping piece can stably clamp the auxiliary frame.

[0009] Optionally, the transmission piece comprises a transmission table, a transmission lever and a transmission block. The transmission table is fixedly connected to the base. A rotating shaft is fixedly connected to the transmission lever. The rotating shaft is rotatably connected to the transmission table. Two transmission levers on the same base are symmetrically arranged. A transmission groove is formed in the base. The transmission groove is communicated with the positioning groove. The transmission block is slidably connected in the transmission groove. The transmission block is connected to the clamping piece. A transmission hole is formed in the transmission block. One end of the transmission lever is arranged in the transmission hole, and the other end is connected to the clamping elastic piece.

[0010] By adopting the technical scheme, the clamping elastic piece is used to control the rotation of the transmission lever, the transmission lever is rotated on the transmission table by the rotating shaft, the transmission lever drives the transmission block to move synchronously through the transmission hole, and the transmission block moves synchronously to control the clamping piece to move.

[0011] Optionally, one end of the transmission lever penetrating through the transmission hole is fixedly connected with a let-in bump, the let-in bump is arranged in an arc shape, and the let-in bump is attached to the inner wall of the transmission hole.

[0012] By adopting the technical scheme, the let-in bump arranged in an arc shape can better adapt to the slight angle change of the transmission lever relative to the transmission hole during the rotation process, the force transmission is smoother, the risk of jamming is reduced, and the service life and reliability of the mechanism are improved.

[0013] Optionally, the opening of the transmission groove gradually decreases from bottom to top.

[0014] By adopting the technical scheme, the wedge-shaped design that the opening of the transmission groove is small at the top and large at the bottom effectively limits the risk that the transmission block is pulled out of the transmission groove upward during the movement process, and the working safety and reliability of the mechanism are improved.

[0015] Optionally, the rotating shaft is fixedly connected with a locking ratchet, the transmission lever is provided with a locking ratchet gear, the locking ratchet gear is engaged with the locking ratchet, the locking ratchet gear controls the locking ratchet to enable the transmission lever to be driven to rotate by the clamping elastic piece, and the transmission lever is further provided with an unlocking piece, so that the reset piece controls the unlocking piece to disengage the locking ratchet gear from the locking ratchet.

[0016] By adopting the technical scheme, the cooperation of the locking ratchet gear and the locking ratchet enables only the clamping elastic piece to drive the transmission lever to rotate, so that the transmission lever drives the transmission block to drive the clamping piece to clamp the auxiliary frame, and the force reaction of the auxiliary frame to the transmission lever during welding or assembly is avoided to cause the transmission lever to rotate in the opposite direction.

[0017] Meanwhile, the cooperation of the reset piece and the unlocking piece enables the reset piece to drive the clamping piece to reset, and the locking of the locking ratchet gear to the locking ratchet is released, so that the clamping piece is smoothly driven to reset and open.

[0018] Optionally, the unlocking piece comprises an unlocking shaft, an unlocking abutting block and a reset elastic piece, the unlocking shaft is fixedly connected to the transmission lever, the locking ratchet gear is rotatably connected to the unlocking shaft, the unlocking abutting block is fixedly connected to the side of the locking ratchet gear away from the locking ratchet, one end of the reset elastic piece is in abutment with the unlocking abutting block, and the other end of the reset elastic piece is in abutment with the transmission lever, so as to drive the locking ratchet gear to rotate towards the direction of engaging with the locking ratchet.

[0019] When the reset member drives the clamping member to reset, the reset member abuts against the unlocking abutment to compress the reset elastic member, and the locking ratchet gear is rotated around the unlocking shaft, so that the locking ratchet gear is separated from the locking ratchet wheel, and the transmission lever can be smoothly rotated around the rotating shaft, and then the clamping member is smoothly driven to reset and open.

[0020] Optionally, the reset member comprises a reset protrusion and reset rods, the reset protrusion is fixedly connected to the connecting member, the reset rods are provided in two, and the two reset rods are located on two sides of the reset protrusion, one side of the reset rod is attached to the reset protrusion, and the other end of the reset rod penetrates through the base and the unlocking abutment, and the distance between the reset protrusion and the reset rod gradually decreases along the length direction of the connecting member.

[0021] By adopting the above technical scheme, the reset protrusion is driven to move towards the reset rod by the driving member, and the horizontal section of the reset protrusion is triangularly arranged, so that the reset protrusion gradually drives the reset rod to move towards the outside of the base, and the reset rod abuts against the unlocking abutment, and then the transmission lever is pushed to rotate to drive the clamping member to reset and open.

[0022] Optionally, the unlocking abutment is located between the rotating shaft and the clamping elastic member.

[0023] By adopting the above technical scheme, the unlocking abutment is located between the rotating shaft and the elastic member, so that the reset rod moves a shorter distance to drive the transmission lever to rotate a larger amplitude.

[0024] Optionally, the clamping member comprises a clamping shaft, a driving gear, a driving tooth rod, a driven gear and a clamping tooth rod, the clamping shaft is rotationally connected to the base, the driving gear is fixedly connected to the clamping shaft, one end of the driving tooth rod is fixedly connected to the transmission block, the other end of the driving tooth rod is engaged with the driving gear, the driven gear is fixedly connected to the clamping shaft, the clamping tooth rod is slidingly connected to the base, the clamping tooth rod and the driving tooth rod are located on two sides of the clamping shaft, and the clamping tooth rod is engaged with the driven gear.

[0025] By adopting the above technical scheme, when the transmission block moves, the transmission block drives the driving tooth rod to move, the driving tooth rod drives the driving gear and the clamping shaft to synchronously rotate, the clamping shaft drives the driven gear to synchronously rotate, and the driven gear drives the clamping tooth rod to move, and the clamping tooth rod is used to clamp or reset the auxiliary frame.

[0026] Optionally, the driven gear and the clamping tooth rod are both oblique teeth.

[0027] By adopting the technical scheme, the number of simultaneously meshed teeth of the helical gear is generally more than that of the spur gear, the contact line on the tooth surface is inclined, the transmission is more stable and has less backlash by virtue of the helical meshing characteristics, and the clamping positioning accuracy is improved.

[0028] To sum up, the present application has at least one of the following beneficial technical effects: 1. By the cooperation of the base, the seat, the clamping piece, the transmission piece, the clamping elastic piece, the driving piece, the reset piece and the connecting piece, the sub-frame is clamped by the clamping seats, so that more sizes of the sub-frame can be adapted, and when the sub-frame is located near the clamping piece of one side of the positioning groove, the clamping piece near the one side first abuts against the sub-frame, and the clamping elastic piece drives the clamping piece of the other side to continue to abut against the sub-frame, so that the sub-frame in the positioning groove is clamped, and therefore the clamping piece can stably clamp the sub-frame regardless of the curvature of the middle part of the sub-frame. 2. By the cooperation of the clamping elastic piece, the transmission table, the transmission lever and the transmission block, the clamping elastic piece controls the rotation of the transmission lever, the transmission lever rotates on the transmission table by the rotation shaft, the transmission lever drives the transmission block to move synchronously through the transmission hole, and the transmission block synchronously controls the movement of the clamping piece. 3. By the cooperation of the transmission lever, the rotation shaft, the locking ratchet, the locking ratchet wheel, the unlocking shaft, the unlocking block and the reset elastic piece, the locking ratchet and the locking ratchet wheel are matched, so that only the clamping elastic piece can drive the transmission lever to rotate, the transmission lever drives the transmission block to drive the clamping piece to clamp the sub-frame, and the reverse rotation of the transmission lever caused by the force reaction of the sub-frame during welding or assembly is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of a self-adaptive positioning clamp suitable for a plurality of sub-frames in the embodiment of the present application.

[0030] Figure 2 is a structural schematic view of a clamping seat in the embodiment of the present application.

[0031] Figure 3 is Figure 2 is a sectional view of A-A in

[0032] Figure 4 is a structural schematic view of a transmission piece and a locking ratchet in the embodiment of the present application.

[0033] Explanation of reference signs: 1, base; 2, clamping seat; 21, base; 22, clamping piece; 221, clamping shaft; 222, driving gear; 223, driving tooth rod; 224, driven gear; 225, clamping tooth rod; 23, transmission piece; 231, transmission table; 232, transmission lever; 233, transmission block; 234, rotating shaft; 235, transmission hole; 236, let go of the bump; 24, clamping elastic piece; 3, control piece; 31, driving piece; 32, reset piece; 321, reset bump; 322, reset rod; 33, connecting piece; 4, positioning groove; 5, transmission groove; 6, locking ratchet; 61, locking ratchet; 7, unlocking piece; 71, unlocking shaft; 72, unlocking block; 73, reset elastic piece. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings Figures 1-4 The application is further described in detail.

[0035] The embodiment of the application discloses a self-adaptive positioning clamp suitable for multiple vehicle types of auxiliary frames.

[0036] Referring to Figure 1 A self-adaptive positioning clamp suitable for multiple vehicle types of auxiliary frames comprises a base 1, a plurality of clamping seats 2 and a control piece 3. The plurality of clamping seats 2 are distributed on the base 1, and the positions of the clamping seats 2 correspond to the profiles of the auxiliary frames. Each clamping seat 2 comprises a base 21, two clamping pieces 22, two transmission pieces 23 and a clamping elastic piece 24. The base 21 is fixedly connected to the base 1. The base 21 is provided with a positioning groove 4. The clamping pieces 22 are symmetrically installed on the base 21 about the positioning groove 4. The transmission pieces 23 are symmetrically installed on the base 21 about the positioning groove 4, and the transmission pieces 23 are arranged in one-to-one correspondence with the clamping pieces 22. One end of each transmission piece 23 is connected to the clamping piece 22, and the other end is connected to the clamping elastic piece 24. The clamping elastic piece 24 is a tension spring. The control piece 3 comprises a driving piece 31, a reset piece 32 and a connecting piece 33. The driving piece 31 is fixedly connected to the base 1. The reset piece 32 is installed in one-to-one correspondence with the base 21. The connecting piece 33 connects the reset piece 32 and the driving piece 31. The reset piece 32 abuts against the transmission piece 23. The two clamping pieces 22 are controlled to move towards each other and approach the inside of the positioning groove 4 under the driving of the clamping elastic piece 24, so as to be more adaptive to the curvature of the middle part of different auxiliary frames, thereby achieving the effect of conveniently clamping auxiliary frames of different shapes.

[0037] The clamping seat 2 in the embodiment is provided with 6 seats, 4 of which are clamped in the 4 legs of the auxiliary frame, and the other 2 are clamped in the part with an arc in the middle of the auxiliary frame. The auxiliary frame is stably clamped by the 6 clamping seats 2. In the embodiment, the clamping seat 2 is mainly used to clamp the auxiliary frame of a passenger car. In other embodiments, the auxiliary frame of other models can be clamped according to the needs, such as 7, 8, 9 or more clamping seats 2 for larger vehicles such as fire engines and ambulances.

[0038] The clamping member 22 in the embodiment includes a clamping shaft 221, a driving gear 222, a driving tooth rod 223, a driven gear 224, and a clamping tooth rod 225. The clamping shaft 221 is rotationally connected to the base 21. The driving gear 222 is fixedly connected to the clamping shaft 221. One end of the driving tooth rod 223 is fixedly connected to the transmission member 23, and the other end is engaged with the driving gear 222. The driven gear 224 is fixedly connected to the clamping shaft 221. The clamping tooth rod 225 is slidingly connected to the base 21, and the clamping tooth rod 225 is located on both sides of the clamping shaft 221 with the driving tooth rod 223. The clamping tooth rod 225 is engaged with the driven gear 224. The driving tooth rod 223 is driven to move by the transmission member 23. The clamping tooth rod 225 clamps or resets the auxiliary frame by the transmission of the clamping shaft 221, the driving gear 222, and the driven gear 224.

[0039] When the clamping elastic member 24 drives the transmission member 23 to move, the transmission member 23 drives the driving tooth rod 223 to move away from the positioning groove 4. The movement of the driving tooth rod 223 drives the driving gear 222 and the clamping shaft 221 to rotate synchronously. The rotation of the clamping shaft 221 drives the driven gear 224 to rotate synchronously. The rotation of the driven gear 224 drives the clamping tooth rod 225 to move towards the positioning groove 4, thereby clamping the auxiliary frame by the clamping tooth rod 225.

[0040] When the reset member 32 drives the transmission member 23 to move, the transmission member 23 drives the driving tooth rod 223 to move towards the positioning groove 4. The movement of the driving tooth rod 223 drives the driving gear 222 and the clamping shaft 221 to rotate reversely synchronously. The reverse rotation of the clamping shaft 221 drives the driven gear 224 to rotate reversely synchronously. The reverse rotation of the driven gear 224 drives the clamping tooth rod 225 to move away from the positioning groove 4, thereby opening the clamping tooth rod 225.

[0041] In the embodiment, the clamping tooth rod 225 on the same clamping shaft 221 is provided with 2. In other embodiments, it can be provided with 3, 4, or 5.

[0042] In an optional embodiment, the driven gear 224 and the clamping tooth rod 225 are both provided with helical teeth. The number of teeth simultaneously engaged by the helical gear is usually more than that of the spur gear. The contact line on the tooth surface is inclined. The use of the helical tooth engagement characteristic makes the transmission more stable and less backlash, which helps to improve the clamping positioning accuracy.

[0043] The transmission member 23 comprises a transmission table 231, a transmission lever 232 and a transmission block 233, the transmission table 231 is fixedly connected to the base 21, the transmission lever 232 is fixedly connected with a rotating shaft 234, the rotating shaft 234 is rotatably connected to the transmission table 231, the two transmission levers 232 on the same base 21 are symmetrically arranged, the base 21 is provided with a transmission groove 5, the transmission groove 5 is communicated with the positioning groove 4, the transmission block 233 is slidably connected in the transmission groove 5, and the transmission block 233 is connected with the driving toothed rod 223, the transmission block 233 is provided with a transmission hole 235, one end of the transmission lever 232 is arranged in the transmission hole 235, and the other end is connected with the clamping elastic member 24.

[0044] The clamping elastic member 24 drives the transmission lever 232 to rotate, the transmission lever 232 rotates around the rotating shaft 234 on the transmission table 231, the transmission lever 232 drives the transmission block 233 to move away from the positioning groove 4 through the transmission hole 235, the transmission block 233 moves away from the positioning groove 4 synchronously controls the driving toothed rod 223 to move away from the positioning groove 4, and the driving toothed rod moves away from the positioning groove 4 synchronously controls the clamping toothed rod 225 to move towards the positioning groove 4 to clamp the auxiliary frame.

[0045] In the embodiment, the opening of the transmission groove 5 gradually decreases from bottom to top, the wedge-shaped design of the transmission groove 5 with the opening being small at the top and large at the bottom effectively limits the risk that the transmission block 233 is out of the transmission groove 5 during movement, and improves the working safety and reliability of the mechanism.

[0046] In an optional embodiment, one end of the transmission lever 232 arranged in the transmission hole 235 is fixedly connected with a let-go protrusion 236, the let-go protrusion 236 is arranged in a circular arc, and the let-go protrusion 236 is attached to the inner wall of the transmission hole 235. The let-go protrusion 236 arranged in a circular arc can better adapt to the slight angle change of the transmission lever 232 relative to the transmission hole 235 during rotation, make the force transmission smoother, reduce the risk of jamming, and improve the service life and reliability of the mechanism. At the same time, the let-go protrusion 236 can be more attached to the inner wall of the transmission hole 235, so that the transmission process is more precise.

[0047] The rotating shaft 234 is fixedly connected with a locking ratchet 6, the transmission lever 232 is provided with a locking ratchet tooth 61, the locking ratchet tooth 61 is engaged with the locking ratchet 6, and the locking ratchet tooth 61 controls the locking ratchet 6 to enable the transmission lever 232 to be driven to rotate by the clamping elastic member 24, that is, the clamping elastic member 24 can drive the transmission lever 232 to rotate, so that the transmission lever 232 drives the clamping member 22 to clamp the auxiliary frame through the transmission block 233, thereby avoiding that the force of the auxiliary frame during welding or assembly is reacted to the transmission lever 232 to cause the transmission lever 232 to rotate in the opposite direction.

[0048] The unlocking piece 7 is further arranged on the transmission lever 232, and the unlocking piece 7 comprises an unlocking shaft 71, an unlocking block 72 and a reset spring 73. The unlocking shaft 71 is fixedly connected to the transmission lever 232, the locking ratchet 61 is rotatably connected to the unlocking shaft 71, the unlocking block 72 is fixedly connected to the locking ratchet 61 away from the locking ratchet wheel 6, one end of the reset spring 73 is in abutment with the unlocking block 72, and the other end of the reset spring 73 is in abutment with the transmission lever 232. The reset spring 73 is a compression spring. When the reset piece 32 drives the clamping piece 22 to reset, the locking ratchet 61 can be unlocked from the locking ratchet wheel 6, so that the transmission lever 232 can be smoothly rotated around the rotating shaft 234, and the clamping piece 22 can be smoothly driven to reset and open.

[0049] When the reset piece 32 drives the clamping piece 22 to reset, the reset piece 32 is in abutment with the unlocking block 72, so that the reset spring 73 is compressed, and the locking ratchet 61 is driven to rotate around the unlocking shaft 71, so that the locking ratchet 61 is separated from the locking ratchet wheel 6, so that the transmission lever 232 can be smoothly rotated around the rotating shaft 234, and the clamping piece 22 can be smoothly driven to reset and open.

[0050] The driving piece 31 in the embodiment is a hydraulic cylinder, the reset piece 32 comprises a reset protrusion 321 and reset rods 322. The reset protrusion 321 is fixedly connected to the connecting piece 33. The reset rods 322 are provided in two, and the two reset rods 322 are located on both sides of the reset protrusion 321. One side of the reset rod 322 is in abutment with the reset protrusion 321, and the other end of the reset rod 322 penetrates through the base 21 and the unlocking block 72. The distance between the reset protrusion 321 and the reset rods 322 gradually decreases along the length direction of the connecting piece 33.

[0051] When the clamping piece 22 needs to be driven to reset and open, the driving piece 31 is extended to drive the reset protrusion 321 to move towards the reset rods 322. Since the horizontal section of the reset protrusion 321 is triangularly arranged, the reset protrusion 321 gradually drives the reset rods 322 to move towards the outside of the base 21, so that the reset rods 322 are in abutment with the unlocking block 72, and the transmission lever 232 is driven to rotate to drive the clamping piece 22 to reset and open.

[0052] When the clamping piece 22 needs to be driven to reset and open, the driving piece 31 is extended to drive the reset protrusion 321 to move towards the reset rods 322. Since the horizontal section of the reset protrusion 321 is triangularly arranged, the reset protrusion 321 gradually drives the reset rods 322 to move towards the outside of the base 21, so that the reset rods 322 are in abutment with the unlocking block 72, and the transmission lever 232 is driven to rotate to drive the clamping piece 22 to reset and open. The unlocking abutting block 72 is located between the rotating shaft 234 and the clamping elastic member 24, that is, the contact point at which the reset rod 322 abuts against the transmission lever 232 to reset is also located between the rotating shaft 234 and the clamping elastic member 24. By locating the unlocking abutting block 72 between the rotating shaft 234 and the elastic member, the reset rod 322 moves a shorter distance to drive the transmission lever 232 to rotate a larger amplitude. Thus, the slope of the reset protrusion 321 can be balanced, the slope of the reset protrusion 321 is more gentle, and the load of the driving member 31 is lower.

[0053] The six clamping seats 2 in the embodiment are provided in two groups, the clamping seats 2 in the same group are driven by the same driving member 31, and the clamping seats 2 located in the middle slightly approach each other, so the connecting member 33 is slightly bent. The connecting member 33 in the embodiment is a connecting rod, and the connecting member 33 in other embodiments can also be a connecting rope or the like. The reset protrusions 321 in the same group are connected by the connecting rod, so that the driving members 31 in the same group synchronously drive the reset protrusions 321 in the same group to move.

[0054] The implementation principle of the self-adaptive positioning clamp suitable for the multiple vehicle types auxiliary frame in the embodiment is as follows: the driving member 31 is first extended to drive the reset protrusion 321 to move towards the reset rod 322, the reset rod 322 is moved out of the base 21 by the abutment of the reset protrusion 321, the reset rod 322 abuts against the unlocking abutting block 72, the reset elastic member 73 is compressed by the abutment of the reset rod 322 against the unlocking abutting block 72, the locking ratchet 61 is driven to rotate around the unlocking shaft 71, the locking ratchet 61 is separated from the locking ratchet wheel 6, the transmission lever 232 can smoothly rotate around the rotating shaft 234, the clamping elastic member 24 is in an elongated state, the upper end of the transmission lever 232 drives the transmission block 233 to move towards the positioning groove 4, the transmission block 233 drives the driving toothed rod 223 to move close to the positioning groove 4, the driving toothed rod 223 drives the driving gear 222 and the clamping shaft 221 to synchronously rotate, the clamping shaft 221 drives the driven gear 224 to rotate, and the driven gear 224 drives the clamping toothed rod 225 to move away from the positioning groove 4, so that the clamping toothed rod 225 is opened.

[0055] Then the auxiliary frame is placed in the positioning groove 4, the driving member 31 is retracted, the reset protrusion 321 is driven to move away from the reset rod 322, the reset protrusion 321 is separated from the reset rod 322 at this time, the unlocking abutting block 72 is pushed by the reset elastic member 73 to make the locking ratchet 61 engage with the locking ratchet wheel 6, so that only the clamping elastic member 24 can drive the transmission lever 232 to rotate.

[0056] Meanwhile, the elastic clamping piece 24 drives the transmission lever 232 to rotate, at this time, the upper end of the transmission lever 232 drives the transmission block 233 to move away from the positioning groove 4, the transmission block 233 moves away from the positioning groove 4 to drive the driving toothed rod 223 to move away from the positioning groove 4, the driving toothed rod 223 moves to drive the driving gear 222 and the clamping shaft 221 to rotate synchronously, the clamping shaft 221 rotates to drive the driven gear 224 to rotate synchronously, the driven gear 224 rotates to drive the clamping toothed rod 225 to move towards the positioning groove 4, because the middle part of the sub-frame has different radii, the sub-frame is not located in the middle of the positioning groove 4, so the clamping toothed rod 225 located near one side of the positioning groove 4 will first abut against the sub-frame, and at this time, the elastic clamping piece 24 will still drive the clamping toothed rod 225 on the other side to move towards the sub-frame, and when the clamping toothed rods 225 on both sides abut against the sub-frame, the locking ratchet 61 also engages with the locking ratchet wheel 6, the locking of the transmission lever 232 is completed, so that the elastic clamping piece 24 is not insufficient, and the sub-frame is not moved due to the stress reaction to the clamping toothed rod 225 during welding or assembly.

[0057] Six clamping seats 2 are used to clamp the sub-frame at the same time, so that more sizes of sub-frames can be adapted, and because the two clamping pieces 22 located on the same base 21 are driven and clamped by the same elastic piece, when the sub-frame is located near one side of the clamping piece 22 in the positioning groove 4, the clamping piece 22 near one side first abuts against the sub-frame, and the elastic clamping piece 24 drives the clamping piece 22 on the other side to continue to abut against the sub-frame, so that the sub-frame in the positioning groove 4 is clamped, therefore, no matter how the radius of the middle part of the sub-frame is, the clamping piece 22 can stably clamp the sub-frame, so that the effect of conveniently clamping sub-frames of different shapes is achieved. The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An adaptive positioning fixture suitable for subframes of multiple vehicle models, characterized in that: include: Base (1); A plurality of clamping seats (2), the plurality of clamping seats (2) are distributed on the base (1), and the positions of the clamping seats (2) correspond to the outline of the subframe, each of the clamping seats (2) comprises a base (21), two clamping members (22), two transmission members (23) and a clamping elastic member (24), the base (21) is fixedly connected to the base (1), a positioning groove (4) is provided on the base (21), and the clamping members (22) are symmetrically mounted on the base (1) with respect to the positioning groove (4). On the base (21), two transmission members (23) are symmetrically mounted on the base (21) with respect to the positioning groove (4), and the transmission members (23) and the clamping members (22) are arranged in a one-to-one correspondence, one end of each transmission member (23) is connected to the clamping member (22), and the other end is connected to the clamping elastic member (24), so that the clamping elastic member (24) drives the clamping members (22) toward the inside of the positioning groove (4) and approaches each other through the transmission member (23); The control member (3) includes a driving member (31), a reset member (32) and a connecting member (33), wherein the driving member (31) is fixedly connected to the base (1), the reset members (32) are mounted on the base (21) in a one-to-one correspondence, and the connecting member (33) connects the reset members (32) with the driving member (31), and the reset members (32) abut against the transmission member (23) so that the transmission member (23) drives the clamping members (22) to open away from the interior of the positioning groove (4).

2. The adaptive positioning fixture for subframes of various vehicle types according to claim 1, characterized in that: The transmission member (23) includes a transmission platform (231), a transmission lever (232) and a transmission block (233). The transmission platform (231) is fixedly connected to the base (21). The transmission lever (232) is fixedly connected to a rotation shaft (234). The rotation shaft (234) is rotatably connected to the transmission platform (231). The two transmission levers (232) located on the same base (21) are symmetrically arranged. The base (21) is provided with a transmission groove (5). The transmission groove (5) is communicated with the positioning groove (4). The transmission block (233) is slidably connected in the transmission groove (5). The transmission block (233) is connected to the clamping member (22). The transmission block (233) is provided with a transmission hole (235). One end of the transmission lever (232) is inserted into the transmission hole (235), and the other end is connected to the clamping elastic member (24).

3. The adaptive positioning fixture for subframes of various vehicle types according to claim 2, characterized in that: One end of the transmission lever (232) passing through the transmission hole (235) is fixedly connected to a relief convex block (236), the relief convex block (236) being arranged in an arc shape and being fitted to the inner wall of the transmission hole (235).

4. The adaptive positioning fixture for subframes of various vehicle types according to claim 2, characterized in that: The opening of the transmission groove (5) gradually decreases from bottom to top.

5. The adaptive positioning fixture for subframes of various vehicle types according to any one of claims 2 to 4, characterized in that: A locking ratchet (6) is fixedly connected to the rotating shaft (234), and a locking ratchet (61) is installed on the transmission lever (232). The locking ratchet (61) is engaged with the locking ratchet (6). The locking ratchet (61) controls the locking ratchet (6) so that the transmission lever (232) is driven to rotate by the clamping elastic member (24). An unlocking member (7) is also installed on the transmission lever (232) so that the reset member (32) controls the unlocking member (7) to release the locking ratchet (61) from engaging with the locking ratchet (6).

6. The adaptive positioning fixture for subframes of various vehicle types according to claim 5, characterized in that: The unlocking member (7) comprises an unlocking shaft (71), an unlocking block (72) and a reset elastic member (73), wherein the unlocking shaft (71) is fixedly connected to the transmission lever (232), the locking ratchet (61) is rotatably connected to the unlocking shaft (71), the unlocking block (72) is fixedly connected to a side of the locking ratchet (61) away from the locking ratchet (6), one end of the reset elastic member (73) abuts against the unlocking block (72), and the other end abuts against the transmission lever (232) to drive the locking ratchet (61) to rotate in a direction of engagement with the locking ratchet (6).

7. The adaptive positioning fixture for subframes of various vehicle types according to claim 6, characterized in that: The reset member (32) includes a reset protrusion (321) and a reset rod (322). The reset protrusion (321) is fixedly connected to the connecting member (33). Two reset rods (322) are provided, and the two reset rods (322) are located on both sides of the reset protrusion (321). One side of the reset rod (322) is in contact with the reset protrusion (321), and the other end passes through the base (21) and is in contact with the unlocking block (72). The distance between the reset protrusion (321) and the two sides of the reset rod (322) gradually decreases along the length direction of the connecting member (33).

8. The adaptive positioning fixture for subframes of various vehicle types according to claim 7, characterized in that: The unlocking stop (72) is located between the rotating shaft (234) and the clamping elastic member (24).

9. The adaptive positioning fixture for subframes of various vehicle types according to claim 2, characterized in that: The clamping member (22) comprises a clamping shaft (221), a driving gear (222), a driving gear rod (223), a driven gear (224) and a clamping gear rod (225), wherein the clamping shaft (221) is rotatably connected to the base (21), the driving gear (222) is fixedly connected to the clamping shaft (221), one end of the driving gear rod (223) is fixedly connected to the transmission block (233), and the other end is meshed with the driving gear (222), the driven gear (224) is fixedly connected to the clamping shaft (221), the clamping gear rod (225) is slidably connected to the base (21), and the clamping gear rod (225) and the driving gear rod (223) are located on both sides of the clamping shaft (221), and the clamping gear rod (225) is meshed with the driven gear (224).

10. The adaptive positioning fixture for subframes of various vehicle types according to claim 9, characterized in that: The driven gear (224) and the clamping gear rod (225) both use helical teeth.

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