A kind of auxiliary tool for automobile hood hinge assembly

Abstract

The utility model provides a kind of for the auxiliary tool of automobile engine hood hinge assembly, including tool body, first tool support mechanism, second tool support mechanism, tool positioning mechanism, hinge installation support mechanism, hinge upper support mechanism and hinge installation positioning mechanism. Every group first tool support mechanism, tool positioning mechanism and second tool support mechanism are sequentially spaced in the side end end of corresponding tool body, respectively for with the corresponding vehicle body positioning system in the engine compartment is positioned installation;Hinge upper support mechanism is located between second tool support mechanism and tool positioning mechanism, and hinge installation support mechanism is provided at one end, and two groups of hinge installation positioning mechanism are provided at top, to place and clamp hood hinge to realize accurate positioning. The utility model can reduce the minimum installation deviation of hood hinge by the positioning of tool and the positioning system of vehicle body, with the advantages of improving assembly accuracy and efficiency, reducing manual intervention.

Description

Technical Field

[0001] This utility model relates to the field of automotive assembly technology, and in particular to an auxiliary tooling for assembling automotive hood hinges. Background Technology

[0002] In automobile manufacturing, the assembly precision of the hood hinge directly affects the overall appearance quality and opening / closing performance of the vehicle. Traditional hood hinge assembly fixtures have several technical defects: First, insufficient positioning accuracy, with gaps between the fixture and the vehicle body positioning system leading to hinge installation position deviations; second, limited adjustment range, unable to adapt to the size variations of different vehicle models, resulting in low flexibility; third, lack of self-adaptive clamping function, requiring frequent manual adjustments to the clamping force, which affects assembly efficiency and makes it difficult to ensure consistency.

[0003] These technical defects frequently lead to misalignment between the hood hinges and the hood mounting holes during assembly, increasing rework rates and extending assembly time. This is particularly problematic in multi-model mixed-line production scenarios, where traditional tooling struggles to quickly adapt to the assembly requirements of different models, severely limiting the flexibility of the production line. Utility Model Content

[0004] This invention addresses the problems of low assembly accuracy and poor efficiency in existing automotive hood hinge assembly tooling by providing an auxiliary tooling for automotive hood hinge assembly that can quickly and accurately position, self-adaptively clamp, and adapt to flexible production.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0006] An auxiliary tooling for assembling automotive hood hinges includes a tooling body and a first tooling support mechanism, a second tooling support mechanism, a tooling positioning mechanism, a hinge mounting support mechanism, an upper hinge support mechanism, and a hinge mounting positioning mechanism symmetrically mounted at the left and right ends of the tooling body, wherein:

[0007] Each group of the first tooling support mechanism, tooling positioning mechanism and second tooling support mechanism is arranged sequentially at intervals on the side end of the corresponding tooling body, and is used to position and install with the corresponding vehicle body positioning system in the engine compartment.

[0008] The upper hinge support mechanism is located between the second tooling support mechanism and the tooling positioning mechanism. One end of the hinge is provided with the hinge installation support mechanism, and the top is provided with two sets of the hinge installation positioning mechanisms to place and clamp the machine cover hinge for precise positioning.

[0009] Preferably, the tooling body includes a support frame, a reinforcing connecting rod, a handle, a first safety baffle, and a first travel limit plate, wherein:

[0010] The support frame is a rectangular frame structure, with several reinforcing connecting rods spaced apart inside, and handles, a first safety baffle and a first travel limit plate respectively provided at the left and right ends;

[0011] The first safety baffle has an inverted L-shaped structure and is arranged opposite to the second safety baffle on the upper support mechanism of the hinge; and

[0012] The first travel limit plate is a horizontally arranged F-shaped structure, which is arranged in a limiting manner with the second travel limit plate on the upper support mechanism of the hinge.

[0013] Preferably, the first tooling support mechanism includes a first L-shaped mounting bracket, a first mounting block, a first upper clamping block, a first T-shaped mounting seat, a first clamping rod, a first lower clamping block, a first pressing handle, and a diagonal connecting rod, wherein:

[0014] The first L-shaped mounting bracket is a horizontally arranged L-shaped structure, one end of which is fixedly connected to the rear end of the tooling body, and the two are connected by the diagonal connecting rod at the corner position to form a triangular connection structure.

[0015] The bottom ends of the other end of the first L-shaped mounting bracket are provided with the first mounting block and the first upper clamping block at intervals, and the bottom of the first upper clamping block is provided with the first T-shaped mounting seat;

[0016] The right end of the first clamping rod is hinged to the lower right corner of the first T-shaped mounting base, and the top of the left end is provided with a first lower clamping block corresponding to the first upper clamping block; and

[0017] The first pressing handle is movably sleeved on the first clamping rod through the mounting hole in its middle, and its upper end is hinged to the upper left corner of the first T-shaped mounting base so as to lock the left end of the first clamping rod synchronously during left and right movement.

[0018] Preferably, the second tooling support mechanism includes a tooling support block and a tooling connecting block, wherein:

[0019] One end of the tooling support block is connected to one end of the tooling connecting block, and the other end is configured as an inverted L-shaped structure facing downwards;

[0020] The tooling connecting block is a horizontally arranged L-shaped structure, with its other end fixedly installed at the right end of the sliding platform on the upper support mechanism of the hinge.

[0021] Preferably, the tooling positioning mechanism includes a first L-shaped tooling bracket, a second L-shaped tooling bracket, a tooling positioning pin, and a connecting plate, wherein:

[0022] The first L-shaped tooling bracket has an L-shaped structure, with its upper horizontal section fixedly connected to one end of the connecting plate, and the other end of the connecting plate fixedly connected to the end of the tooling body.

[0023] The second L-shaped tooling bracket has an L-shaped structure, with its upper vertical section fixedly connected to the lower vertical section of the first L-shaped tooling bracket, and the lower horizontal section having a vertically arranged tooling positioning pin threaded onto its end.

[0024] Preferably, the hinge mounting support mechanism includes a second L-shaped mounting bracket, a second T-shaped mounting base, a second clamping rod, a hinge support block, and a second pressing handle, wherein:

[0025] The second L-shaped mounting bracket has an inverted L-shaped structure. The lower end of its vertical section is fixedly connected to the left end of the support block mounting plate of the upper support mechanism of the hinge, and the second T-shaped mounting seat is fixedly installed on the side wall of the upper horizontal section.

[0026] The upper end of the second clamping rod is hinged to the upper left corner of the second T-shaped mounting base, and the hinge support block is fixedly installed on one side of the lower end, and the other end of the hinge support block extends inward to form a first support platform.

[0027] The second pressing handle is movably sleeved on the second clamping rod through the mounting hole in its middle, and its right end is hinged to the lower right corner of the second T-shaped mounting base so as to lock the lower end of the second clamping rod simultaneously during left and right movement.

[0028] Preferably, the upper hinge support mechanism includes a support block mounting plate, an upper hinge support block, and an inverted L-shaped support plate, wherein:

[0029] The support block mounting plate is connected to the side end of the tooling body, and the upper support block of the hinge is respectively provided at both ends of its top, and the inverted L-shaped support plate for installing the corresponding hinge mounting and positioning mechanism is provided on the right side of its top.

[0030] One end of the upper support block of the hinge is fixed to the support block mounting plate by bolts through rubber pads arranged at intervals at its bottom, and the other end extends outward to form a first support platform.

[0031] More preferably, the upper hinge support mechanism further includes a sliding platform and a slide rail assembly, wherein:

[0032] The sliding platform is fixedly installed on the side of the tooling body, and it is connected to the upper support block mounting plate through the slide rail assemblies arranged laterally at both ends.

[0033] More preferably, a second safety baffle and a second travel limit plate, arranged at left and right intervals, are fixedly provided at the middle position of the top of the support block mounting plate, wherein:

[0034] The second safety baffle has an L-shaped structure and is arranged opposite to the first safety baffle at the end of the tooling body to limit the travel of the support block mounting plate;

[0035] The second travel limit plate has an inverted T-shaped structure, and its top end is embedded in the bottom F-shaped groove of the first travel limit plate at the end of the tooling body to control the extension and retraction range of the support block mounting plate.

[0036] Preferably, the hinge mounting and positioning mechanism comprises two sets, each including a third T-shaped mounting base, a third clamping rod, a hinge mounting and positioning pin, and a third pressing handle, wherein:

[0037] The third T-shaped mounting base has a T-shaped structure, and its lower end is installed at the left and right ends of the upper support block mounting plate of the upper hinge support mechanism.

[0038] The right end of the third clamping rod is hinged to the upper right corner of the third T-shaped mounting base, and the left end is provided with a vertically arranged hinge mounting positioning pin.

[0039] The upper end of the hinge mounting positioning pin is bolted and can be adjusted up and down to be mounted on the third clamping rod, while the lower end is arranged correspondingly to the second support platform on the support block mounting plate;

[0040] The third pressing handle is movably sleeved on the third clamping rod through the mounting hole in its middle, and its lower end is hinged to the lower left corner of the third T-shaped mounting base so as to lock the left end of the third clamping rod synchronously during left and right movement.

[0041] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0042] This utility model provides an auxiliary tooling for assembling automotive hood hinges, comprising a tooling body and a first tooling support mechanism, a second tooling support mechanism, a tooling positioning mechanism, a hinge mounting support mechanism, an upper hinge support mechanism, and a hinge mounting positioning mechanism symmetrically installed at the left and right ends of the tooling body. Through the coordinated action of multiple sets of support mechanisms and positioning mechanisms, it achieves precise coordination with the vehicle body positioning system. At the same time, it utilizes an adjustable clamping structure and support block mounting plate to adapt to different vehicle sizes, effectively solving the technical problems of insufficient positioning accuracy and limited adjustment range of traditional tooling. It has the advantages of improving assembly consistency and reducing manual intervention, and significantly improves assembly accuracy and efficiency. It can adapt to the assembly and positioning of multiple models of hood hinges. Attached Figure Description

[0043] Figure 1 This is a three-dimensional structural diagram of an auxiliary tooling for assembling automotive hood hinges according to the present invention. Figure 1 ;

[0044] Figure 2 This is a three-dimensional structural diagram of an auxiliary tooling for assembling automotive hood hinges according to the present invention. Figure 2 ;

[0045] Figure 3 This is a schematic diagram of the main structure of an auxiliary tooling for assembling automotive hood hinges according to the present invention.

[0046] Figure 4 This utility model Figure 3 The diagram shows a partially enlarged structural schematic of part A in an auxiliary tooling used for assembling automotive hood hinges.

[0047] Figure 5 This is a schematic diagram of the assembly structure of the left-end mechanisms in an auxiliary tooling for assembling automotive hood hinges according to this utility model. Figure 1 ;

[0048] Figure 6 This is a schematic diagram of the assembly structure of the left-end mechanisms in an auxiliary tooling for assembling automotive hood hinges according to this utility model. Figure 2 ;

[0049] Figure 7 This is a schematic diagram of a partial structure on the left end of an auxiliary tooling for assembling automotive hood hinges according to this utility model. Figure 1 ;

[0050] Figure 8 This is a schematic diagram of a partial structure on the left end of an auxiliary tooling for assembling automotive hood hinges according to this utility model. Figure 2 ;

[0051] Figure 9 This is a schematic diagram of a partial structure on the left end of an auxiliary tooling for assembling automotive hood hinges according to this utility model. Figure 3 ;

[0052] Figure 10 This is a schematic diagram of a partial structure on the left end of an auxiliary tooling for assembling automotive hood hinges according to this utility model. Figure 4 ;

[0053] The accompanying figures are labeled as follows:

[0054] 100-Tooling body, 101-Support frame, 102-Reinforcing connecting rod, 103-Handle, 104-First safety baffle, 105-First travel limit plate;

[0055] 200-First tooling support mechanism, 201-First L-shaped mounting bracket, 202-First mounting block, 203-First upper clamping block, 204-First T-shaped mounting seat, 205-First clamping rod, 206-First lower clamping block, 207-First pressing handle, 208-Diagonal connecting rod;

[0056] 300 - Second tooling support mechanism; 301 - Tooling support block; 302 - Tooling connecting block;

[0057] 400-Tooling positioning mechanism, 401-First L-shaped tooling bracket, 402-Second L-shaped tooling bracket, 403-Tooling positioning pin, 404-Connecting plate;

[0058] 500-Hinge mounting support mechanism, 501-Second L-shaped mounting bracket, 502-Second T-shaped mounting base, 503-Second clamping rod, 504-Hinge support block, 505-Second pressing handle;

[0059] 600-Hinge upper support mechanism, 601-Sliding platform, 602-Support block mounting plate, 603-Slide rail assembly, 604-Hinge upper support block, 605-Inverted L-shaped support plate, 606-Second safety baffle, 607-Second travel limit plate;

[0060] 700-Hinge mounting and positioning mechanism, 701-Third T-type mounting base, 702-Third clamping rod, 703-Hinge mounting and positioning pin, 704-Third pressing handle. Detailed Implementation

[0061] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0062] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0063] In existing technologies, the automotive assembly industry has long faced the problem of insufficient positioning accuracy and limited adjustment range in hood hinge assembly tooling. Traditional tooling relies on manual adjustment, making it difficult to achieve precise alignment between the hinge mounting holes and the vehicle body positioning system, leading to accumulated assembly deviations. Especially in multi-model mixed-line production scenarios, fixed tooling cannot adapt to the differences in hinge sizes, requiring frequent tooling changes or complex adjustments, which seriously affects the production line cycle time. For example, when switching to a certain model, operators need to manually adjust the position of the support mechanism and recalibrate the positioning pins, which takes up to 30 minutes, and even after adjustment, a slight positioning error still exists.

[0064] To address these issues, researchers discovered that the lack of modular design and adaptive clamping functionality in existing tooling was a key factor contributing to inefficiency. Analysis of the assembly process revealed that insufficient hinge support stability and a single positioning constraint point exacerbated assembly deviations. Based on this, the research team proposed constructing a multi-point positioning system and a layered support structure. This system uses symmetrically arranged support mechanisms to create spatial coupling constraints, while introducing adjustable clamping units to achieve adaptive clamping. For example, a support block mounting plate is incorporated into the three-point positioning system, allowing it to automatically adjust the support spacing according to the hinge dimensions, reducing manual intervention.

[0065] In some of these embodiments, based on the above design concept, such as Figure 1 , Figure 2 and Figure 3 As shown, this application proposes an auxiliary tooling for assembling automotive hood hinges, including a tooling body 100 and a first tooling support mechanism 200, a second tooling support mechanism 300, a tooling positioning mechanism 400, a hinge mounting support mechanism 500, a hinge upper support mechanism 600, and a hinge mounting positioning mechanism 700 symmetrically installed at the left and right ends of the tooling body 100. Each set of the first tooling support mechanism 200, tooling positioning mechanism 400, and second tooling support mechanism 300 is sequentially and spaced apart at the side ends of the corresponding tooling body 100, and is used for positioning and installation with the corresponding body positioning system in the automotive engine compartment. The hinge upper support mechanism 600 is located between the second tooling support mechanism 300 and the tooling positioning mechanism 400, with a hinge mounting support mechanism 500 at one end and two sets of hinge mounting positioning mechanisms 700 at the top, to place and clamp the hood hinge for precise positioning.

[0066] The tooling body 100 refers to the basic frame supporting various functional modules, which can be implemented using a welded rectangular support frame with internal cross reinforcing ribs to improve rigidity. The first tooling support mechanism 200 is the front-end clamping unit used to connect to the vehicle body positioning system, which can be implemented using a lever-type clamping device with a T-shaped mounting base, achieving rapid locking by pressing the handle to drive the clamping rod. The tooling positioning mechanism 400 is a guide component that provides alignment between the tooling and the vehicle body reference holes, which can be implemented using an L-shaped bracket with threaded adjustment, and its end positioning pin can adapt to different hole diameters. The upper hinge support mechanism 600 is the platform supporting the hood hinge body, which can be implemented using a support block mounting plate connected by a slide rail, with adjustable support blocks on both sides of the platform to accommodate different hinge lengths. The hinge mounting and positioning mechanism 500 is a clamping unit that fixes the hinge mounting holes, which can be implemented using a rotating clamping rod with a positioning pin, and the opening and closing angle of the clamping rod is controlled by pressing the handle.

[0067] Specifically, the tooling body 100 serves as the assembly reference, and its symmetrical structure ensures balanced force on both sides. After the tooling is inserted into the vehicle body reference hole via the positioning pin of the tooling positioning mechanism 400, the first tooling support mechanism 200 and the second tooling support mechanism 300 respectively clamp or limit its contact with the front longitudinal beam and firewall area of ​​the vehicle body, forming a three-point positioning system. The operator places the hood hinge on the support platform of the hinge mounting support mechanism 500 and the upper hinge support mechanism 600, and moves the clamping rod of the hinge mounting positioning mechanism 600 to precisely insert the positioning pin into the hinge mounting hole. During this process, pressing the handle drives the clamping rod to generate a downward clamping force, eliminating the gap between the hinge and the support surface. Because the three-point positioning system and the vehicle body positioning system form a spatial coupling constraint, the overall rigidity of the tooling is significantly enhanced, effectively suppressing vibration and displacement during assembly.

[0068] Through the above technical solutions, this application solves the problems of insufficient positioning accuracy and low flexibility of traditional tooling. The synergistic effect of the three-point positioning system and the vehicle body positioning system controls the assembly deviation within ±0.5mm, meeting the requirements of high-precision assembly. The application of the lever-type clamping mechanism reduces manual adjustment steps, improves assembly efficiency by more than 40%, and avoids hinge deformation caused by excessive clamping force.

[0069] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, this application further proposes a tooling body 100 including a support frame 101, reinforcing links 102, a handle 103, a first safety baffle 104, and a first travel limit plate 105. The support frame 101 is a rectangular frame structure, with several reinforcing links 102 spaced apart inside, and a handle 103, a first safety baffle 104, and a first travel limit plate 105 respectively provided at the left and right ends. The first safety baffle 104 has an inverted L-shaped structure and is arranged opposite to the second safety baffle 606 on the upper hinge support mechanism 600. The first travel limit plate 105 has a transversely arranged F-shaped structure and is arranged to limit the travel of the second travel limit plate 607 on the upper hinge support mechanism 600.

[0070] The supporting frame 101 is a rectangular load-bearing structure formed by welding metal profiles, specifically aluminum alloy. Reinforcing rods 102 are arranged at intervals and welded laterally to the front and rear square tubes of the supporting frame 101, forming a multi-directional force-bearing support system. The reinforcing rods 102 are parallel, spaced-apart transverse connecting rods that are welded to the inner wall of the supporting frame 101 to form a grid-like reinforcement structure. The first safety baffle 104 is a protective component with a vertical folded edge, forming a protective area opposite to the second safety baffle 606. The first travel limit plate 105 is an F-shaped steel plate formed by CNC stamping, which forms an interlocking limit relationship with the inverted T-shaped protrusion of the second travel limit plate 607.

[0071] Specifically, the support frame 101 forms a grid-like support structure through internally installed reinforcing rods 102, effectively improving the frame's bending and torsional stiffness and preventing elastic deformation of the tooling body 100 under load. The handles 103 at both ends are recessed, facilitating two-handed handling for overall tooling transport. The first safety baffle 104 and the second safety baffle 606 form opposing protective areas, preventing inward sliding during the movement of the support block mounting plate 602 and providing a certain degree of limitation. The F-shaped structure of the first travel limit plate 105 and the inverted T-shaped protrusion of the second travel limit plate 607 form a limiting fit, allowing the support block mounting plate 602 to adapt to the installation travel requirements of different vehicle models' hinges when moved to the inner or outer end.

[0072] Through the above technical solutions, this application effectively enhances the structural rigidity of the tooling body 100, ensuring that each positioning mechanism maintains a stable spatial position during assembly. The handle 102 structure enables convenient movement of the tooling, meeting the needs of rapid changeover on the production line. The arrangement of the first safety baffle 104 and the second safety baffle 606 forms a protective zone, preventing offset of the installation position caused by the inward transition of the support block mounting plate 602 during operation. The cooperation of the F-type and inverted T-type limiting structures enables precise control of the stroke of the support block mounting plate 602, adapting to the assembly requirements of hinges of different sizes of machine covers.

[0073] In some of these embodiments, such as Figure 3 , Figure 4 and Figure 5As shown, this application further proposes a first tooling support mechanism 200 including a first L-shaped mounting bracket 201, a first mounting block 202, a first upper clamping block 203, a first T-shaped mounting seat 204, a first clamping rod 205, a first lower clamping block 206, a first pressing handle 207, and a diagonal connecting rod 208. The first L-shaped mounting bracket 201 is a horizontally arranged L-shaped structure, one end of which is fixedly connected to the rear end of the tooling body 100, and the two are connected by a diagonal connecting rod 208 at the corner, forming a triangular connection structure. The bottom ends of the other end of the first L-shaped mounting bracket 201 are provided with the first mounting block 202 and the first upper clamping block 203 at intervals, and the bottom of the first upper clamping block 203 is provided with the first T-shaped mounting seat 204. The right end of the first clamping rod 205 is hinged to the lower right corner of the first T-shaped mounting seat 204, and the top of the left end is provided with the first lower clamping block 206 corresponding to the first upper clamping block 203. The first pressing handle 207 is movably sleeved on the first clamping rod 205 through the mounting hole in its middle, and its upper end is hinged to the upper left corner of the first T-shaped mounting base 204 so as to lock the left end of the first clamping rod 205 synchronously during left and right movement.

[0074] The first L-shaped mounting bracket 201 is a right-angled support member with a horizontal extension, which can be made of welded steel plate and is used to construct the mounting base of the tooling support mechanism 200. The inclined connecting rod 208 is an inclined rod connecting the tooling body 100 and the first L-shaped mounting bracket 201, which is welded together to form a triangular stable structure to enhance torsional resistance. The first T-shaped mounting base 204 is a mounting base with a T-shaped cross-section, which can be made of cast aluminum alloy and is used to provide a hinge fulcrum for the clamping rod. The first clamping rod 205 is a rod-shaped component with a hinged end, which transmits operating force through the lever principle. The first pressing handle 207 is an operating rod with a sleeve structure, which forms a linkage relationship with the first clamping rod 205 through the hinge point on the first T-shaped mounting base 204.

[0075] Specifically, the horizontally arranged first L-shaped mounting bracket 201 forms a triangular connection structure with the tooling body 100 through the diagonal connecting rod 208, preventing the support mechanism from bending and deforming under load. When the operator moves and presses the first pressing handle 207, the first pressing handle 207 rotates around its hinge point and pushes the first clamping rod 205 to swing around the hinge point of the T-shaped mounting base 204, causing the first lower clamping block 205 to move upward and form a clamping action with the first upper clamping block 203. The hinge point layout of the first T-shaped mounting base 204 creates a self-locking effect on the clamping rod during movement, and the clamping force increases with the increase of external force, ensuring clamping stability.

[0076] In some of these embodiments, such as Figure 5 , Figure 6 , Figure 9 and Figure 10 As shown, this application further proposes a second tooling support mechanism 300 including a tooling support block 301 and a tooling connecting block 302, wherein one end of the tooling support block 301 is connected to one end of the tooling connecting block 302, and the other end is configured as an inverted L-shaped structure facing downward; the tooling connecting block 302 is a horizontally arranged L-shaped structure, and its other end is fixedly installed at the right end of the sliding platform 601 on the upper hinge support mechanism 600.

[0077] The inverted L-shaped structure of the tooling support block 301 refers to a geometric shape combining a vertical support surface and a horizontal extension. It can be formed using casting or stamping processes, and directional limiting is achieved by the inverted L-shaped end contacting the vehicle body positioning reference surface. The L-shaped structure of the tooling connecting block 202 refers to a horizontal layout with a right-angle turn. It can be fixed by welding or bolting. Its horizontal section forms surface contact with the sliding platform to enhance structural rigidity, and the right-angle turn provides lateral constraint to prevent displacement. The right end of the sliding platform 601 refers to the installation area near the edge of the front side of the tooling body 600. The connecting block can be fixed using pre-drilled mounting holes, and the structural strength of this area ensures support stability.

[0078] Specifically, when the inverted L-shaped end of the tooling support block 301 contacts the vehicle body positioning reference surface, its horizontal extension and the L-shaped horizontal section of the tooling connecting block 302 form a double support plane, dispersing the load through the contact pressure of the inverted L-shaped vertical section. The right end of the sliding platform 601 is fixedly connected to the tooling connecting block 302 through bolt holes. The reinforced connection structure in this area can effectively suppress deformation caused by vibration, allowing the tooling support block 301 to maintain its predetermined geometric position under load.

[0079] In some of these embodiments, such as Figure 5 and Figure 6 As shown, this application further proposes a tooling positioning mechanism 400 including a first L-shaped tooling bracket 401, a second L-shaped tooling bracket 102, a tooling positioning pin 403, and a connecting plate 404. The first L-shaped tooling bracket 401 has an L-shaped structure, with its upper horizontal section fixedly connected to one end of the connecting plate 404, and the other end of the connecting plate 404 fixedly connected to the end of the tooling body 100. The second L-shaped tooling bracket 402 has an L-shaped structure, with its upper vertical section fixedly connected to the lower vertical section of the first L-shaped tooling bracket 401, and a vertically arranged tooling positioning pin 403 threadedly installed at the end of its lower horizontal section.

[0080] The first L-shaped tooling bracket 401 is a right-angle support structure composed of a horizontal section and a vertical section. Its horizontal section is fixedly connected to the connecting plate 404 by bolts, used to transfer the load of the positioning mechanism to the tooling 100. The second L-shaped tooling bracket 402 is a secondary support structure perpendicularly connected to the first L-shaped tooling bracket 401. Specifically, it can be fixed to the vertical section of the first L-shaped tooling bracket 401 by welding, forming a double L-shaped frame to enhance structural rigidity. The tooling positioning pin 403 is a cylindrical positioning component with external threads at the top. It is screwed into the threaded hole at the end of the second L-shaped tooling bracket 402 and tightened with upper and lower nuts to achieve vertical length adjustment. The connecting plate 404 is a transition component connecting the tooling body and the positioning mechanism, with bolt holes at both ends for fixing to the tooling body 100 and the horizontal section of the first L-shaped tooling bracket 401.

[0081] Specifically, the first L-shaped tooling bracket 401 forms a rigid horizontal connection with the connecting plate 404 through its transverse section, establishing a stable load transfer path between the tooling positioning mechanism 400 and the tooling body 100. The vertical section of the second L-shaped tooling bracket 402 is welded to the vertical section of the first bracket to form a vertically reinforcing structure, constituting a three-dimensional support frame to resist lateral forces. The tooling positioning pin 403 achieves vertical height adjustability through threaded installation, allowing it to adapt to the depth differences of positioning holes on different vehicle models. The connecting plate 404, as an intermediate connecting component, fixes the tooling positioning mechanism 400 to the end of the tooling body 100, for example, using M8 bolts for a four-point connection, ensuring no relative displacement occurs during positioning.

[0082] Through the above technical solutions, this application achieves rapid and accurate alignment between the tooling and the vehicle body positioning system. The thread adjustment function of the tooling positioning pin 403 can compensate for the manufacturing tolerances of the vehicle body positioning holes, and the double L-shaped bracket structure effectively suppresses lateral displacement generated during assembly. The multi-point fixing method of the connecting plate 404 ensures a rigid connection between the positioning mechanism and the tooling body 101, keeping the overall positioning accuracy of the tooling within a certain range and avoiding hinge assembly deviations caused by tooling offset.

[0083] In some of these embodiments, such as Figure 7 , Figure 8 and Figure 9As shown, this application further proposes a hinge mounting support mechanism 500 including a second L-shaped mounting bracket 501, a second T-shaped mounting seat 502, a second clamping rod 503, a hinge support block 504, and a second pressing handle 505, wherein: the second L-shaped mounting bracket 501 has an inverted L-shaped structure, the lower end of its vertical section is fixedly connected to the left end of the support block mounting plate 602 on the upper hinge support mechanism 600, and the side wall of the upper horizontal section is fixedly mounted with the second T-shaped mounting seat 502; The upper end of the second clamping rod 503 is hinged to the upper left corner of the second T-shaped mounting base 502, and a hinge support block 504 is fixedly installed on one side of the lower end. The other end of the hinge support block 504 extends inward to form a first support platform. The second pressing handle 505 is movably sleeved on the second clamping rod 503 through the mounting hole in its middle, and its right end is hinged to the lower right corner of the second T-shaped mounting base 502 so as to lock the lower end of the second clamping rod 503 simultaneously during left and right movement.

[0084] The inverted L-shaped structure of the second L-shaped mounting bracket 501 refers to a bracket form in which the vertical and horizontal sections are connected at right angles. The fixed connection between its vertical section and the support block mounting plate 602 provides basic support for the clamping mechanism. The second T-shaped mounting base 502 refers to a base with a horizontally extending mounting surface. Specifically, it can be welded or bolted to the side wall of the horizontal section of the second L-shaped mounting bracket 501, used to construct the hinge fulcrum of the clamping rod. The hinged connection of the second clamping rod 503 means that the upper end of the rod is rotatably connected to the second T-shaped mounting base 502 via a pin, giving the second clamping rod 503 the freedom to rotate around its axis. The first support platform of the hinge support block 504 refers to the planar bearing part formed by the inward extension of the block. Specifically, it can be made of an aluminum alloy block with anti-slip textured surface, used to directly contact and support the bottom surface of the machine cover hinge. The movable sleeve of the second pressing handle 505 means that the opening in the middle of the handle is inserted through the outer periphery of the second clamping rod 503, so that the pressure block on its inner hole can be used to squeeze the second clamping rod 503 during its movement and flipping process to clamp the vehicle body system.

[0085] Specifically, when the operator places the machine cover hinge on the first support platform of the hinge support block 504, the second clamping rod 503 naturally droops under gravity, forming an initial support angle. The operator then pulls the second pressing handle 504 to the left, creating a lever fulcrum through the hinge point between the right end of the handle and the second T-shaped mounting base 502. This forces the middle part of the handle, which is sleeved on the second clamping rod 503, to move downwards. This displacement causes an inward clamping force at the lower end of the second clamping rod 503, making the hinge support block 504 tightly adhere to the bottom surface of the hinge and form a rigid support. When the second pressing handle 504 is pulled in the opposite direction, the lever effect is released, and the clamping rod returns to its free swing state for quick workpiece replacement.

[0086] In some of these embodiments, such as Figure 7, Figure 8 , Figure 9 and Figure 10 As shown, this application further proposes a hinge upper support mechanism 600 including a support block mounting plate 602, a hinge upper support block 604, and an inverted L-shaped support plate 605. The support block mounting plate 602 is connected to the side end of the tooling body 100, and the hinge upper support block 604 is respectively provided at both ends of its top. The inverted L-shaped support plate 605 for installing the corresponding hinge mounting positioning mechanism 700 is provided on the right side of its top. One end of the hinge upper support block 604 is fixedly installed on the support block mounting plate 602 by bolts through rubber pads arranged at intervals at its bottom, and the other end extends outward to form a first support platform.

[0087] The support block mounting plate 602 is a load-bearing base that is fixedly or movably installed on the side of the tooling body 100. Specifically, it can be detachably connected with bolts or use a slide rail assembly 603 in conjunction with the sliding platform 601 to achieve displacement adjustment, used to adjust the horizontal position of the support structure according to hinge size differences. The upper hinge support block 604 is a mounting base with an extended support plane. Specifically, it can absorb assembly vibration errors by setting a rubber pad at the bottom, and simultaneously use bolts passing through the rubber pad to form an elastic fixed connection with the support block mounting plate, achieving stable support under dynamic working conditions. The inverted L-shaped support plate 605 is a mounting bracket with a vertical positioning surface. Specifically, its right-angle structure provides a dual positioning reference in both horizontal and vertical directions for the hinge mounting and positioning mechanism 700.

[0088] Specifically, the support block mounting plate 602 provides a mounting base for the upper hinge support block 604. The rubber pad at the bottom of the upper hinge support block 604 undergoes compression deformation during bolt tightening, generating an elastic clamping force to counteract displacement deviations caused by assembly vibrations. An inverted L-shaped support plate 605 is fixed to the right side of the top of the support block mounting plate 602, providing an installation reference for the hinge mounting positioning pin 600 and avoiding contact with the lower upper hinge support block 604. The first support platform formed by the outer end of the upper hinge support block 604 directly supports the hinge body. Its flatness is ensured by the machining precision of the support block mounting plate, forming a spatial cooperative positioning system with the hinge mounting positioning pin 703 on the hinge mounting positioning mechanism 700.

[0089] As one specific implementation method, such as Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, this application further proposes that the upper hinge support mechanism 600 also includes a sliding platform 601 and a slide rail assembly 603. The sliding platform 601 is fixedly installed on the side of the tooling body 100, and it is connected to the upper support block mounting plate 602 through the slide rail assemblies 603 arranged laterally at the left and right ends.

[0090] The sliding platform 601 refers to the basic mounting platform that supports the slide rail assembly 603. Specifically, it can be made of steel plate to form a rectangular plate, which is fixed to the side of the tooling body 100 by bolts to provide rigid support for the slide rail assembly. The slide rail assembly 603 refers to the guide mechanism that realizes the lateral displacement of the support block mounting plate. Specifically, it can be a combination structure of linear guide rail and slider, which is symmetrically installed on the left and right sides of the top of the sliding platform 601 by bolts, so that the support block mounting plate 602 has translational freedom along the extension direction of the guide rail.

[0091] Specifically, the sliding platform 601 is fixedly connected to the side of the tooling body 100, forming a stable mounting base. The slide rail assembly 603 is arranged laterally on the left and right sides of the sliding platform 601, and its guide rail axis is parallel to the width direction of the tooling body 100. The support block mounting plate 602 forms a sliding pair with the guide rail through a slider set at its bottom, allowing the support block mounting plate 602 to be adjusted laterally along the extension direction of the guide rail. When it is necessary to adapt to the hood hinges of different vehicle models, by controlling the lateral movement position of the support block mounting plate 602, the positions of the tooling positioning mechanism 400, the upper support block 604 of the hinge, the hinge mounting positioning mechanism 700, and other components mounted on it are adjusted synchronously with the support block mounting plate 602, thereby matching the installation size requirements of different hinges.

[0092] Compared to existing technologies, traditional tooling has a fixed support platform that cannot be adjusted laterally, requiring the replacement of the entire tooling for hinges of different sizes. This solution, however, combines the slide rail assembly 603 with the sliding platform 101, enabling the support block mounting plate 602 to have an adjustable lateral position. Only the position of the support block mounting plate 602 needs to be adjusted to accommodate different hinges, eliminating the need to replace the tooling body or support mechanism, significantly reducing changeover costs.

[0093] Through the above technical solution, this application realizes the lateral position adjustment function of the upper support mechanism 600 of the hinge, so that the tooling can quickly adapt to the installation size differences of the hood hinge of different vehicle models through the displacement of the support block mounting plate 602. Under the premise of keeping the main structure of the tooling unchanged, it can complete the positioning support of multiple hinge models, effectively improve the flexibility of the tooling and reduce the cost of changing models.

[0094] In addition, such as Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, this application further proposes to fix a second safety baffle 606 and a second travel limit plate 607 arranged at left and right intervals at the middle position of the top of the support block mounting plate 602. The second safety baffle 606 has an L-shaped structure and is arranged opposite to the first safety baffle 104 at the end of the tooling body 100 to limit the travel of the support block mounting plate 606. The second travel limit plate 607 has an inverted T-shaped structure and its top end is correspondingly embedded in the bottom F-shaped groove of the first travel limit plate 105 at the end of the tooling body 100 to control the extension and retraction range of the support block mounting plate 602.

[0095] The second safety baffle 606 is a metal plate formed by L-shaped bending, specifically made by stamping steel plate. Its horizontal section is fixedly connected to the top surface of the support block mounting plate 602, and its vertical section forms a complementary limiting surface with the first safety baffle 104. The second stroke limiting plate 607 is a limiting component with an inverted T-shaped cross-section, the protruding part of its top end forming a limiting contact with the inner wall of the F-shaped groove. The F-shaped groove refers to the groove structure set at the bottom of the outer end of the horizontally arranged F-shaped second stroke limiting plate 105, and the front and rear walls of the groove correspond to the two working positions of the support block mounting plate 602.

[0096] Specifically, when the support block mounting plate 602 moves horizontally along the slide rail assembly 603, the vertical section of the second safety baffle 607 forms surface contact with the vertical section of the first safety baffle 104 on the tooling body 100. When the displacement of the support block mounting plate 602 exceeds the set range, mechanical interference occurs, achieving mechanical limiting. At the same time, the top of the inverted T-shaped second stroke limiting plate 607 is embedded in the F-shaped groove, and its top flange can abut against the two side walls inside the groove, limiting the lateral movement distance of the support block mounting plate 602 through the two inner side walls of the groove.

[0097] In some of these embodiments, such as Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, this application further proposes that the hinge mounting and positioning mechanism 700 consists of two sets, each including a third T-shaped mounting base 701, a third clamping rod 702, a hinge mounting and positioning pin 703, and a third pressing handle 704. Specifically, the third T-shaped mounting base 701 has a T-shaped structure, with its lower end corresponding to the left and right ends of the support block mounting plate 602 on the upper hinge support mechanism 600; the right end of the third clamping rod 702 is hinged to the upper right corner of the third T-shaped mounting base 701, and the left end... A vertically arranged hinge mounting pin 703 is provided; the upper end of the hinge mounting pin 703 is bolted and can be adjusted up and down to be mounted on the third clamping rod 702, and the lower end is arranged correspondingly to the second support platform on the support block mounting plate 602; the third pressing handle 704 is movably sleeved on the third clamping rod 703 through the mounting hole in its middle, and its lower end is hinged to the lower left corner of the third T-shaped mounting base 701 so as to lock the left end of the third clamping rod 702 simultaneously during left and right movement.

[0098] The third T-shaped mounting base 701 refers to a support base with a T-shaped cross-section, whose lower end is fixed to both sides of the support block mounting plate 602 by bolts, providing a stable mounting foundation for the clamping rod. The third clamping rod 702 refers to a lever component with a hinge fulcrum, which forms a rotating pair with the third T-shaped mounting base 701, and forms a lever arm structure through the hinge point at the upper right corner. The hinge mounting positioning pin 703 refers to a positioning component with a threaded adjustment function, which realizes vertical height adjustment through the adjusting nut. The third pressing handle 704 refers to an operating component with a sleeve structure, which forms a linkage mechanism with the third T-shaped mounting base 701 through the hinge point.

[0099] Specifically, during the hood hinge assembly process, after the support block mounting plate 602 is adjusted to the desired position according to the vehicle model, the two sets of hinge mounting and positioning mechanisms 700 move synchronously to the target station. The operator places the hinge on the second support platform and manually presses the third pressing handle 704, causing the third clamping rod 702 to rotate around the hinge point, allowing the hinge mounting and positioning pin 703 to be vertically inserted into the hinge mounting hole. At this point, the lower end of the hinge mounting and positioning pin 703 forms a clamping action with the support platform, using the lever principle to convert the operating force of the handle into a vertical clamping force. When it is necessary to replace a different model of hinge, the adjusting nut on the top of the hinge mounting and positioning pin 703 can be loosened, and its length adjusted up and down to match the hinge mounting hole. Then, the gold-plated nut is tightened again to complete the height adaptation.

[0100] Through the above technical solutions, this application achieves precise dual-point positioning of the machine cover hinge during the assembly process, ensuring the alignment accuracy of the mounting holes; the adjustable hinge mounting positioning pin 703 structure adapts to the installation requirements of hinges of different sizes, improving the flexibility of the tooling; and the lever principle is used to convert manual operation into effective clamping force, reducing operation steps and time consumption, and improving assembly efficiency.

[0101] like Figures 1 to 10 As shown, the auxiliary tooling for assembling automotive hood hinges provided by this utility model works on the following principle: During hood hinge assembly, the auxiliary tooling is first placed at the front of the engine compartment, and the tooling positioning pin 403 is inserted. The tooling is then fixed using the vehicle body positioning system. The hood hinge, through the tooling support block 301 and the two upper hinge support blocks 604, works in conjunction with the tooling. The third pressing handle 704 is moved to insert the hinge installation positioning pin, achieving precise positioning. Finally, the bolts are tightened to complete the assembly process. This auxiliary tooling, as a specialized tooling device for assembling automotive hood hinges, minimizes hood hinge installation deviations by relying on the tooling's positioning and the vehicle body positioning system, thus saving manual adjustment time and costs. It optimizes the assembly cycle with a more convenient assembly method, significantly improving assembly accuracy and efficiency. It can adapt to the assembly and positioning of multiple hood hinge models, solving the problems of low assembly accuracy and poor efficiency in existing hood hinge assembly methods.

[0102] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0103] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0104] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An auxiliary tooling for assembling automotive hood hinges, characterized in that, It includes a tooling body (100) and a first tooling support mechanism (200), a second tooling support mechanism (300), a tooling positioning mechanism (400), a hinge mounting support mechanism (500), an upper hinge support mechanism (600), and a hinge mounting positioning mechanism (700) symmetrically installed at the left and right ends of the tooling body (100), wherein: Each set of the first tooling support mechanism (200), tooling positioning mechanism (400), and second tooling support mechanism (300) is sequentially and spaced apart at the side end of the corresponding tooling body (100), and is used to position and install with the corresponding vehicle body positioning system in the engine compartment. The upper hinge support mechanism (600) is located between the second tooling support mechanism (300) and the tooling positioning mechanism (400). One end of the hinge is provided with the hinge installation support mechanism (500), and the top is provided with two sets of the hinge installation positioning mechanisms (700) to place and clamp the machine cover hinge for precise positioning.

2. The auxiliary tooling according to claim 1, characterized in that, The tooling body (100) includes a support frame (101), a reinforcing link (102), a handle (103), a first safety baffle (104), and a first travel limit plate (105), wherein: The support frame (101) is a rectangular frame structure, with several reinforcing connecting rods (102) spaced apart inside, and handles (103), a first safety baffle (104) and a first travel limit plate (105) respectively provided at the left and right ends. The first safety baffle (104) has an inverted L-shaped structure and is arranged opposite to the second safety baffle (606) on the upper hinge support mechanism (600); and The first travel limit plate (105) is a horizontally arranged F-shaped structure, which is arranged in a limiting manner with the second travel limit plate (607) on the upper support mechanism (600) of the hinge.

3. The auxiliary tooling according to claim 1, characterized in that, The first tooling support mechanism (200) includes a first L-shaped mounting bracket (201), a first mounting block (202), a first upper clamping block (203), a first T-shaped mounting seat (204), a first clamping rod (205), a first lower clamping block (206), a first pressing handle (207), and a diagonal connecting rod (208), wherein: The first L-shaped mounting bracket (201) is a horizontally arranged L-shaped structure. One end of it is fixedly connected to the rear end of the tooling body (100), and the two are connected by the diagonal connecting rod (208) at the corner position to form a triangular connection structure. The first mounting block (202) and the first upper clamping block (203) are spaced apart at the bottom ends of the other end of the first L-shaped mounting bracket (201), and the first T-shaped mounting seat (204) is provided at the bottom of the first upper clamping block (203). The right end of the first clamping rod (205) is hinged to the lower right corner of the first T-shaped mounting base (204), and the top of the left end is provided with the first lower clamping block (206) corresponding to the first upper clamping block (203); and The first pressing handle (207) is movably sleeved on the first clamping rod (205) through the mounting hole in its middle, and its upper end is hinged to the upper left corner of the first T-shaped mounting base (204) so ​​as to lock the left end of the first clamping rod (205) synchronously during the left and right movement.

4. The auxiliary tooling according to claim 1, characterized in that, The second tooling support mechanism (300) includes a tooling support block (301) and a tooling connecting block (302), wherein: One end of the tooling support block (301) is connected to one end of the tooling connecting block (302), and the other end is configured as an inverted L-shaped structure facing downwards; The tooling connecting block (302) is a horizontally arranged L-shaped structure, and its other end is fixedly installed on the right end of the sliding platform (601) of the upper hinge support mechanism (600).

5. The auxiliary tooling according to claim 1, characterized in that, The tooling positioning mechanism (400) includes a first L-shaped tooling bracket (401), a second L-shaped tooling bracket (402), a tooling positioning pin (403), and a connecting plate (404), wherein: The first L-shaped tooling bracket (401) has an L-shaped structure, and its upper horizontal section is fixedly connected to one end of the connecting plate (404), while the other end of the connecting plate (404) is fixedly connected to the end of the tooling body (100). The second L-shaped tooling bracket (402) has an L-shaped structure. Its upper vertical section is fixedly connected to the lower vertical section of the first L-shaped tooling bracket (401), and the lower horizontal section is threaded with the tooling positioning pin (403) arranged vertically.

6. The auxiliary tooling according to claim 1, characterized in that, The hinge mounting support mechanism (500) includes a second L-shaped mounting bracket (501), a second T-shaped mounting base (502), a second clamping rod (503), a hinge support block (504), and a second pressing handle (505), wherein: The second L-shaped mounting bracket (501) has an inverted L-shaped structure. The lower end of its vertical section is fixedly connected to the left end of the support block mounting plate (602) on the upper hinge support mechanism (600). The second T-shaped mounting seat (502) is fixedly installed on the side wall of the upper horizontal section. The upper end of the second clamping rod (503) is hinged to the upper left corner of the second T-shaped mounting base (502), and the hinge support block (504) is fixedly installed on one side of the lower end, and the other end of the hinge support block (504) extends inward to form a first support platform. The second pressing handle (505) is movably sleeved on the second clamping rod (503) through the mounting hole in its middle, and its right end is hinged to the lower right corner of the second T-shaped mounting base (502) so as to lock the lower end of the second clamping rod (503) synchronously during left and right movement.

7. The auxiliary tooling according to claim 1, characterized in that, The upper hinge support mechanism (600) includes a support block mounting plate (602), an upper hinge support block (604), and an inverted L-shaped support plate (605), wherein: The support block mounting plate (602) is connected to the side end of the tooling body (100), and the upper support block (604) of the hinge is provided at both ends of its top, and the inverted L-shaped support plate (605) for installing the corresponding hinge mounting positioning mechanism (700) is provided on the right side of its top. One end of the upper support block (604) of the hinge is fixed to the support block mounting plate (602) by bolts through the rubber pads arranged at intervals at its bottom, and the other end extends outward to form a first support platform.

8. The auxiliary tooling according to claim 7, characterized in that, The upper hinge support mechanism (600) further includes a sliding platform (601) and a slide rail assembly (603), wherein: The sliding platform (601) is fixedly installed on the side of the tooling body (100), and it is connected to the support block mounting plate (602) above through the slide rail assembly (603) arranged laterally at both ends.

9. The auxiliary tooling according to claim 8, characterized in that, The support block mounting plate (602) is fixedly provided with a second safety baffle (606) and a second travel limit plate (607) arranged at left and right intervals at the middle position of the top, wherein: The second safety baffle (606) has an L-shaped structure and is arranged opposite to the first safety baffle (104) at the end of the tooling body (100) to limit the travel of the support block mounting plate (602); The second travel limit plate (607) has an inverted T-shaped structure, and its top end is embedded in the bottom F-shaped groove of the first travel limit plate (105) at the end of the tooling body (100) to control the extension and retraction range of the support block mounting plate (602).

10. The auxiliary tooling according to claim 1, characterized in that, The hinge mounting and positioning mechanism (700) consists of two sets, each including a third T-shaped mounting base (701), a third clamping rod (702), a hinge mounting and positioning pin (703), and a third pressing handle (704), wherein: The third T-shaped mounting base (701) has a T-shaped structure, and its lower end is installed at the left and right ends of the support block mounting plate (602) on the upper support mechanism (600) of the hinge. The right end of the third clamping rod (702) is hinged to the upper right corner of the third T-shaped mounting base (701), and the left end is provided with a vertically arranged hinge mounting positioning pin (703). The upper end of the hinge mounting positioning pin (703) is bolted and can be adjusted up and down to be mounted on the third clamping rod (702), and the lower end is arranged correspondingly to the second support platform on the support block mounting plate (602); The third pressing handle (704) is movably sleeved on the third clamping rod (702) through the mounting hole in its middle part, and its lower end is hinged to the lower left corner of the third T-shaped mounting base (701) so as to lock the left end of the third clamping rod (702) simultaneously during left and right movement.

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