A whole set of tooling for assembling a lower frame of a truck-mounted crane

Abstract

The utility model discloses a kind of overall assembly tool of automobile hoist lower frame, it is related to automobile hoist lower frame production technical field, including base plate, center auxiliary support, front / back connecting beam positioning seat, three left supporting leg positioning support, three right supporting leg positioning support, S type component positioning support, supporting leg front / back limiting support, balance mechanism front / back axle sleeve positioning support, balance mechanism front / back directional auxiliary support;The utility model can accurately position each component of lower frame by setting multiple positioning supports, ensure that the position of each component is accurate without error when assembling, avoid the assembly problem caused by position deviation;The assembly process of each component is more standardized and process-oriented;It can guarantee the consistency of the assembly quality of different batches of lower frame;The tool effectively solves the problems existing in traditional assembly mode, improves the assembly quality and efficiency of automobile hoist lower frame, has remarkable practical value and market application prospect.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile crane underframe production equipment, specifically to an overall assembly tooling for automobile crane underframes. Background Technology

[0002] Truck cranes are lifting equipment widely used in construction, logistics, and other fields. The underframe, as a crucial component that bears and supports the entire truck crane, directly affects its performance and safety through precise assembly. Traditional truck crane underframe assembly methods typically involve manual positioning and assembly, which presents several problems: 1. Low positioning accuracy: Manual positioning is prone to deviation, resulting in inaccurate positions of assembled components, which affects the stability and operational accuracy of the truck crane.

[0003] Low assembly efficiency: Manual assembly requires the collaboration of multiple people and repeated adjustments and calibrations, which consumes a lot of time and manpower.

[0004] Poor consistency: Due to the instability of manual operation, it is difficult to maintain consistent assembly quality between different batches of the underframe, which affects the stability of product quality.

[0005] Insufficient safety: During the assembly process, due to the large weight of the parts and the difficulty in adjusting their position, accidents are prone to occur, posing a threat to the safety of operators.

[0006] Unable to adapt to complex structures: With the development of truck crane technology, the structure of the underframe is becoming increasingly complex, and traditional assembly methods are unable to meet the assembly requirements of complex structures.

[0007] To address the aforementioned issues and improve the assembly quality and efficiency of vehicle chassis under crane assembly, developing a specialized assembly tooling is crucial. This tooling needs to be able to precisely position each component, ensuring assembly consistency and stability, while simultaneously improving assembly efficiency and safety. Summary of the Invention

[0008] The purpose of this utility model is to provide a tooling for assembling the entire chassis of a car crane, so as to solve the problems mentioned in the background art that the traditional assembly method of the chassis of a car crane usually adopts manual positioning and assembly, which has problems such as low positioning accuracy, low assembly efficiency, poor consistency, insufficient safety, and inability to adapt to complex structures.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a tooling for assembling a truck crane underframe, comprising a rectangular base plate with a central auxiliary support at the center of its top surface. The central auxiliary support has a front connecting beam positioning seat on its front side, a rear connecting beam positioning seat on its rear side, a left outrigger positioning support on its left side, and a right outrigger positioning support on its right side. An S-shaped component positioning support is located on the front side of the front connecting beam positioning seat. A left outrigger front positioning support is located on the left side of the S-shaped component positioning support, and a right outrigger front positioning support is located on the right side. A front limit for the outriggers is respectively located on the front side of the left and right outrigger front positioning supports. The rear connecting beam positioning seat is provided with a front axle sleeve positioning support for the balancing mechanism. A rear axle sleeve positioning support for the balancing mechanism is provided behind the front axle sleeve positioning support for the balancing mechanism. Front directional auxiliary supports for the balancing mechanism are provided on both sides in a mirror-symmetrical manner. Rear directional auxiliary supports for the balancing mechanism are provided on both sides in a mirror-symmetrical manner. A left rear positioning support for the left leg is provided on the left rear side of the rear directional auxiliary support for the balancing mechanism on the left side. A right rear positioning support for the right leg is provided on the right rear side of the rear directional auxiliary support for the balancing mechanism on the right side. Rear limiting supports for the left and right legs are respectively provided on the rear sides of the left and right rear positioning supports.

[0010] Preferably, the central auxiliary support includes a central support base plate disposed on the top surface of the base plate and a cylindrical central support column vertically disposed at the center of its top surface, and four central support reinforcing ribs evenly disposed around the central support column and between the top surface of the central support base plate.

[0011] Preferably, the front connecting beam positioning seat and the rear connecting beam positioning seat have the same structure and orientation. Both include a connecting beam base set on the top surface of the base plate and a front-to-back connecting beam horizontal plate vertically set at the center of its top surface. A connecting beam longitudinal plate is set in mirror image symmetrically on the left and right sides of the connecting beam horizontal plate and the top surface of the connecting beam base. A connecting beam auxiliary plate is set on the outer side of the connecting beam longitudinal plate and the side of the connecting beam base. A horizontal top edge is set on the connecting beam longitudinal plate near the outer edge, and a connecting beam bottom plate positioning seat is set on the top of the connecting beam auxiliary plate. The connecting beam bottom plate positioning seat is arc-shaped at one corner near the central auxiliary support. A component switching support is set on the top of the connecting beam horizontal plate and the connecting beam longitudinal plate.

[0012] Preferably, the left outrigger positioning support, the left outrigger front positioning support, and the left outrigger rear positioning support have the same structure and orientation, including an outrigger positioning base provided on the top surface of the base plate, and an outrigger positioning plate vertically provided on the top surface of the base plate in the left and right directions. An auxiliary outrigger positioning plate is vertically provided near the left side of the top of the outrigger positioning plate. The auxiliary outrigger positioning plate has a threaded through hole in the left and right directions near the top of the auxiliary outrigger positioning plate and an outrigger positioning bolt is threadedly installed thereon. Support positioning plates are provided on the front and rear sides of the outrigger positioning plate near the right side. Two locking bolts are provided on the vertical side of the right side of the outrigger positioning plate, and a loading and unloading positioning baffle is provided through the two locking bolts.

[0013] Preferably, the right outrigger positioning support, the right outrigger front positioning support, and the right outrigger rear positioning support have the same structure and orientation, and are mirror images of the left outrigger positioning support with the same structure, including an outrigger positioning base, an outrigger positioning upright plate, an outrigger auxiliary positioning upright plate, an outrigger positioning bolt, a locking bolt, a mounting and dismounting positioning baffle, and a supporting positioning plate.

[0014] Preferably, the S-shaped component positioning support includes an S-shaped component positioning base provided on the top surface of the base plate. The top surface of the S-shaped component positioning base is vertically provided with four S-shaped component positioning side plates arranged in a rectangle. A screw hole is provided through the center of the rear S-shaped component positioning side plate, and a tooling switching locking bolt is provided. A tooling switching positioning seat is provided through the tooling switching locking bolt.

[0015] Preferably, the front limiting support and the rear limiting support of the outrigger are arranged in a mirror image symmetrically, both including a supporting support base plate on the top surface of the base plate. A tooling switching positioning block is provided on the rear side of the supporting support base plate. Supporting support plates are vertically arranged on the top surface of the supporting support base plate near the left and right sides. A supporting support plate protrusion protruding towards the central auxiliary support is provided on the supporting support plate near the upper middle position of the central auxiliary support.

[0016] Preferably, the front axle sleeve positioning support and the rear axle sleeve positioning support of the balancing mechanism have the same structure, both including a axle sleeve positioning support base plate provided on the top surface of the base plate. Axle sleeve positioning support upright plate is vertically provided on the top surface of the axle sleeve positioning support base plate near its front and rear sides. A balancing mechanism anti-foolproof baffle is provided between the two axle sleeve positioning support upright plates and between the top surface of the axle sleeve positioning support base plate. Above the balancing mechanism anti-foolproof baffle, between the two axle sleeve positioning support upright plates, a axle sleeve positioning shaft is provided.

[0017] Preferably, the front directional auxiliary support of the balancing mechanism and the rear directional auxiliary support of the balancing mechanism have the same structure and orientation, and both include a directional auxiliary support upright plate provided on the top surface of the base plate, and an upwardly protruding directional auxiliary support auxiliary upright plate is provided on the top surface of the directional auxiliary support upright plate near the rear side.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. Improved positioning accuracy: By setting multiple positioning supports, the various components of the underframe can be accurately positioned, ensuring that the position of each component is accurate during assembly and avoiding assembly problems caused by positional deviations; at the same time, it ensures that the angle and position of the outriggers are accurate during assembly, thereby improving the stability of the entire underframe; the design of the S-shaped component positioning support further improves the flexibility and accuracy of positioning.

[0019] Improved assembly efficiency: The overall design of this tooling makes the assembly process of each component more standardized and streamlined. Operators only need to place each component on the corresponding positioning support and complete the positioning through a simple tightening operation, eliminating the need for repeated adjustments and calibrations, thus greatly shortening the assembly time. The design of the various positioning supports and auxiliary supports of the tooling makes it easier for operators to install and tighten the components, reducing the difficulty of operation and labor intensity, thereby improving assembly efficiency.

[0020] Ensuring assembly consistency: Due to the high positioning accuracy of the tooling and the fact that the assembly process of each component is based on the fixed position of the tooling, the consistency of the assembly quality of the underframe across different batches can be guaranteed. Regardless of the operator's skill level, as long as assembly is performed according to the positioning requirements of the tooling, a stable product quality can be obtained. This is of great significance for the mass production and quality control of truck cranes, and can effectively improve the product's market competitiveness.

[0021] Enhanced Safety: The use of tooling reduces the complexity and danger of manual operation. In traditional manual assembly, the large weight of components and the difficulty in adjusting their position easily lead to accidents such as component tipping and collisions, threatening the safety of operators. With this tooling, each component is fixed and supported by positioning supports, eliminating the need for operators to directly contact the components during assembly, reducing operational risks and improving the safety of the assembly process.

[0022] Adaptable to Complex Structures: With the continuous development of truck crane technology, the structure of the underframe is becoming increasingly complex, and traditional assembly methods are insufficient to meet its assembly requirements. This tooling, through its reasonable design and layout, can adapt to the assembly of underframes with various complex structures. The design of the tooling's various positioning supports and auxiliary supports also has a certain degree of flexibility. By adjusting the position and angle of the positioning supports, or by replacing some of the positioning supports, it can adapt to the assembly of underframes of different models and structures, demonstrating strong versatility and adaptability.

[0023] In summary, this integrated assembly tooling for the truck crane underframe effectively solves the problems of traditional assembly methods through its precise positioning, efficient assembly, stable structure, and safe operation. It improves the assembly quality and efficiency of the truck crane underframe and has significant practical value and market application prospects. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 Schematic diagram of the central auxiliary support; Figure 4 Schematic diagram of the front / rear connecting beam positioning seat; Figure 5 Schematic diagram of the positioning supports for the left and right outriggers; Figure 6 Schematic diagram of the positioning support for the S-shaped component; Figure 7 Schematic diagram of the front / rear limit support for the outrigger; Figure 8 Schematic diagram of the front / rear bushing positioning support for the balancing mechanism; Figure 9 Schematic diagram of the front / rear directional auxiliary supports for the balancing mechanism; In the diagram: Base plate-1, Central auxiliary support-2, Central support base plate-201, Central support column-202, Central support reinforcing rib-203, Front connecting beam positioning seat-3, Connecting beam base-301, Connecting beam horizontal plate-302, Connecting beam longitudinal plate-303, Connecting beam auxiliary plate-304, Connecting beam base plate positioning seat-305, Component switching support-306, Rear connecting beam positioning seat-4, Left outrigger positioning support-5, Outrigger positioning base-501, Outrigger positioning plate-502, Outrigger auxiliary positioning plate-503, Outrigger positioning bolt-504, Locking bolt-505, Loading / unloading positioning baffle-506, Support positioning plate-507, Right outrigger positioning support-6, S-shaped component positioning support-7, S-shaped component positioning base-701, S-shaped component positioning side plate-702, Tooling cutting Replace locking bolt - 703, tooling switching positioning seat - 704, left outrigger front positioning support - 8, right outrigger front positioning support - 9, outrigger front limit support - 10, outrigger limit support base plate - 101, tooling switching positioning block - 102, outrigger limit vertical plate - 103, outrigger limit vertical plate protrusion - 104, balancing mechanism front bushing positioning support - 11, bushing positioning support base plate - 111, bushing positioning support vertical plate - 112, balancing mechanism anti-foolproof baffle - 113, bushing positioning shaft - 114, balancing mechanism rear bushing positioning support - 12, balancing mechanism front orientation auxiliary support - 13, orientation auxiliary support vertical plate - 131, orientation auxiliary support auxiliary vertical plate - 132, balancing mechanism rear orientation auxiliary support - 14, left outrigger rear positioning support - 15, right outrigger rear positioning support - 16, outrigger rear limit support - 17. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to Figure 1-9 , Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 Schematic diagram of the central auxiliary support; Figure 4 Schematic diagram of the front / rear connecting beam positioning seat; Figure 5 Schematic diagram of the positioning supports for the left and right outriggers; Figure 6 Schematic diagram of the positioning support for the S-shaped component; Figure 7 Schematic diagram of the front / rear limit support for the outrigger; Figure 8 Schematic diagram of the front / rear bushing positioning support for the balancing mechanism; Figure 9 Schematic diagram of the front / rear directional auxiliary supports for the balancing mechanism.

[0027] This utility model provides a tooling for assembling a complete truck crane underframe, including a rectangular base plate 1. A central auxiliary support 2 is provided at the center of the top surface of the base plate 1. A front connecting beam positioning seat 3 is provided on the front side of the central auxiliary support 2, a rear connecting beam positioning seat 4 is provided on the rear side, a left outrigger positioning support 5 is provided on the left side, and a right outrigger positioning support 6 is provided on the right side. An S-shaped component positioning support 7 is provided on the front side of the front connecting beam positioning seat 3. A left outrigger front positioning support 8 is provided on the left side of the S-shaped component positioning support 7, and a right outrigger front positioning support 6 is provided on the right side. A front limiting support 10 for the outrigger is provided on the front side of the left outrigger front positioning support 8 and the right outrigger front positioning support 9, respectively. The rear connecting beam positioning support 6 is provided on the rear connecting beam positioning support 4. A front axle sleeve positioning support 11 for the balancing mechanism is provided on the rear side of the seat 4. A rear axle sleeve positioning support 12 for the balancing mechanism is provided on the rear side of the front axle sleeve positioning support 11. A front directional auxiliary support 13 for the balancing mechanism is provided on the left and right sides in a mirror-symmetrical manner. A rear directional auxiliary support 14 for the balancing mechanism is provided on the left and right sides in a mirror-symmetrical manner. A left leg rear positioning support 15 is provided on the left rear side of the left rear directional auxiliary support 14 for the balancing mechanism, and a right leg rear positioning support 16 is provided on the right rear side of the right rear directional auxiliary support 14 for the balancing mechanism. A rear leg limiting support 17 is provided on the rear side of the left leg rear positioning support 15 and the right leg rear positioning support 16, respectively.

[0028] The central auxiliary support 2 includes a central support base plate 201 disposed on the top surface of the base plate 1. A cylindrical central support column 202 is vertically disposed at the center of the top surface of the central support base plate 201. Four central support reinforcing ribs 203 are evenly disposed around the central support column 202 and between the top surface of the central support base plate 201.

[0029] The front connecting beam positioning seat 3 includes a connecting beam base 301 disposed on the top surface of the base plate 1. A front-to-back connecting beam horizontal plate 302 is vertically disposed at the center of the top surface of the connecting beam base 301. A connecting beam longitudinal plate 303 is disposed mirror-symmetrically on the left and right sides of the connecting beam horizontal plate 302 and the top surface of the connecting beam base 301. A connecting beam auxiliary plate 304 is disposed on the outer side of the connecting beam longitudinal plate 303 and the side of the connecting beam base 301. A horizontal top edge is disposed near the outer edge of the connecting beam longitudinal plate 303 and a connecting beam bottom plate positioning seat 305 is disposed together with the top of the connecting beam auxiliary plate 304. The connecting beam bottom plate positioning seat 305 is arc-shaped near one corner of the central auxiliary support 2. A component switching support 306 is disposed at the top of the connecting beam horizontal plate 302 and the connecting beam longitudinal plate 303.

[0030] The structure and orientation of the rear connecting beam positioning seat 4 are the same as those of the front connecting beam positioning seat 3, including a connecting beam base 301, a connecting beam horizontal plate 302, a connecting beam longitudinal plate 303, a connecting beam auxiliary plate 304, a connecting beam bottom plate positioning seat 305, and a component switching support 306.

[0031] The left support leg positioning support 5 includes a support leg positioning base 501 provided on the top surface of the base plate 1. A support leg positioning plate 502 is vertically provided on the top surface of the support leg positioning base 501 in the left and right directions. A support leg auxiliary positioning plate 503 is vertically provided near the left side of the top of the support leg positioning plate 502. A threaded through hole is provided in the left and right directions near the top of the support leg auxiliary positioning plate 503 and a support leg positioning bolt 504 is threadedly installed. Support positioning plates 507 are provided on the front and rear sides of the support leg positioning plate 502 near the right side. Two locking bolts 505 are provided on the vertical side of the right side of the support leg positioning plate 502, and a loading and unloading positioning baffle 506 is provided through the two locking bolts 505.

[0032] The right support leg positioning support 6 is mirrored and identical in structure to the left support leg positioning support 5, including a support leg positioning base 501, a support leg positioning upright plate 502, a support leg auxiliary positioning upright plate 503, a support leg positioning bolt 504, a locking bolt 505, a loading and unloading positioning baffle 506, and a support positioning plate 507.

[0033] The S-shaped component positioning support 7 includes an S-shaped component positioning base 701 provided on the top surface of the base plate 1. The top surface of the S-shaped component positioning base 701 is vertically provided with four S-shaped component positioning side plates 702 arranged in a rectangle. A screw hole is provided through the center of the rear S-shaped component positioning side plate 702, and a tooling switching locking bolt 703 is provided. A tooling switching positioning seat 704 is provided through the tooling switching locking bolt 703.

[0034] The structure and orientation of the left outrigger front positioning support 8 are exactly the same as those of the left outrigger positioning support 5, including an outrigger positioning base 501, an outrigger positioning upright plate 502, an outrigger auxiliary positioning upright plate 503, an outrigger positioning bolt 504, a locking bolt 505, a loading and unloading positioning baffle 506, and a support positioning plate 507.

[0035] The structure and orientation of the right outrigger front positioning support 9 are exactly the same as those of the right outrigger positioning support 6, including an outrigger positioning base 501, an outrigger positioning upright plate 502, an outrigger auxiliary positioning upright plate 503, an outrigger positioning bolt 504, a locking bolt 505, a loading and unloading positioning baffle 506, and a support positioning plate 507.

[0036] The outrigger front limiting support 10 includes an outrigger limiting support base plate 101 provided on the top surface of the base plate 1. A tooling switching positioning block 102 is provided on the rear side of the outrigger limiting support base plate 101. Outrigger limiting upright plates 103 are vertically provided on the top surface of the outrigger limiting support base plate 101 near the left and right sides respectively. An outrigger limiting upright plate protrusion 104 protruding to the rear is provided at the upper middle position of the rear side of the outrigger limiting upright plate 103.

[0037] The balancing mechanism front bushing positioning support 11 includes a bushing positioning support base plate 111 provided on the top surface of the base plate 1. Bushing positioning support upright plates 112 are vertically provided on the top surface of the bushing positioning support base plate 111 near its front and rear sides. A balancing mechanism anti-foolproof baffle 113 is provided between the two bushing positioning support upright plates 112 and the top surface of the bushing positioning support base plate 111. A bushing positioning shaft 114 is provided above the balancing mechanism anti-foolproof baffle 113 between the two bushing positioning support upright plates 112.

[0038] The structure of the rear axle sleeve positioning support 12 of the balancing mechanism is the same as that of the front axle sleeve positioning support 11 of the balancing mechanism, including a base plate 111 of the axle sleeve positioning support, a vertical plate 112 of the axle sleeve positioning support, a foolproof baffle 113 of the balancing mechanism, and a positioning shaft 114 of the axle sleeve.

[0039] The balancing mechanism front directional auxiliary support 13 includes a directional auxiliary support upright plate 131 provided on the top surface of the base plate 1, and an upwardly protruding directional auxiliary support auxiliary upright plate 132 provided on the top surface of the directional auxiliary support upright plate 131 near the rear side.

[0040] The structure and orientation of the rear directional auxiliary support 14 of the balancing mechanism are the same as those of the front directional auxiliary support 13 of the balancing mechanism, and it includes a directional auxiliary support upright plate 131 and a directional auxiliary support auxiliary upright plate 132.

[0041] The structure and orientation of the left outrigger rear positioning support 15 are exactly the same as those of the left outrigger positioning support 5, including an outrigger positioning base 501, an outrigger positioning upright plate 502, an outrigger auxiliary positioning upright plate 503, an outrigger positioning bolt 504, a locking bolt 505, a loading and unloading positioning baffle 506, and a support positioning plate 507.

[0042] The structure and orientation of the right outrigger rear positioning support 16 are exactly the same as those of the right outrigger positioning support 6, including an outrigger positioning base 501, an outrigger positioning upright plate 502, an outrigger auxiliary positioning upright plate 503, an outrigger positioning bolt 504, a locking bolt 505, a loading and unloading positioning baffle 506, and a support positioning plate 507.

[0043] The rear limiting support 17 of the outrigger is mirror-symmetrically arranged with the front limiting support 10 of the outrigger, and includes a base plate 101 of the outrigger limiting support, a tooling switching positioning block 102, an outrigger limiting upright plate 103, and an outrigger limiting upright plate protrusion 104.

[0044] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A tooling for assembling an entire vehicle frame under a crane, characterized in that: The base plate (1) is rectangular in shape and has a central auxiliary support (2) at the center of its top surface. The central auxiliary support (2) has a front connecting beam positioning seat (3) on its front side, a rear connecting beam positioning seat (4) on its rear side, a left support leg positioning support (5) on its left side, and a right support leg positioning support (6) on its right side. The front connecting beam positioning seat (3) has an S-shaped component positioning support (7) on its front side. The left support leg front positioning support (8) is located on the left side of the S-shaped component positioning support (7), and the right support leg positioning support (6) is located on the right side. The front of the left support leg front positioning support (8) and the right support leg front positioning support (9) are respectively provided with a support leg front limiting support (10). The rear connecting beam positioning seat (4) has a balance... The mechanism has a front axle sleeve positioning support (11), a rear axle sleeve positioning support (12) for the balancing mechanism is provided on the rear side of the front axle sleeve positioning support (11), and a front directional auxiliary support (13) for the balancing mechanism is provided on the left and right sides in a mirror symmetrical manner. A rear directional auxiliary support (14) for the balancing mechanism is provided on the left and right sides of the rear axle sleeve positioning support (12). A left leg rear positioning support (15) is provided on the left rear side of the rear directional auxiliary support (14) for the balancing mechanism located on the left side, and a right leg rear positioning support (16) is provided on the right rear side of the rear directional auxiliary support (14) for the balancing mechanism located on the right side. A leg rear limiting support (17) is provided on the rear side of the left leg rear positioning support (15) and the right leg rear positioning support (16).

2. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The central auxiliary support (2) includes a central support base plate (201) set on the top surface of the base plate (1) and a cylindrical central support column (202) vertically set at the center of its top surface. Four central support reinforcing ribs (203) are evenly arranged around the top surface of the central support column (202) and the central support base plate (201).

3. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The front connecting beam positioning seat (3) and the rear connecting beam positioning seat (4) have the same structure and orientation. Both include a connecting beam base (301) set on the top surface of the base plate (1) and a front-to-back connecting beam horizontal plate (302) vertically set at the center of its top surface. The left and right sides of the connecting beam horizontal plate (302) are respectively mirror-symmetrically arranged with the top surface of the connecting beam base (301) and a connecting beam longitudinal plate (303). The outer side of the connecting beam longitudinal plate (303) and the connecting beam base (301) are respectively mirror-symmetrically arranged with the top surface of the connecting beam base (301). 301) A connecting beam auxiliary upright plate (304) is provided on the side. The connecting beam longitudinal upright plate (303) is provided with a horizontal top edge near the outer side and is provided with a connecting beam bottom plate positioning seat (305) together with the top of the connecting beam auxiliary upright plate (304). The connecting beam bottom plate positioning seat (305) is provided in an arc shape near one corner of the central auxiliary support (2). The connecting beam horizontal upright plate (302) and the connecting beam longitudinal upright plate (303) are provided with a component switching support (306) at their top ends.

4. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The left support leg positioning support (5), the left support leg front positioning support (8), and the left support leg rear positioning support (15) have the same structure and orientation. They include a support leg positioning base (501) set on the top surface of the base plate (1) and a support leg positioning plate (502) set vertically in the left and right directions on its top surface. A support leg auxiliary positioning plate (503) is set vertically near the left side of the top of the support leg positioning plate (502). A threaded through hole is set in the left and right directions near the top of the support leg auxiliary positioning plate (503) and a support leg positioning bolt (504) is threadedly installed. Support positioning plates (507) are set on the front and rear sides of the support leg positioning plate (502) near the right side. Two locking bolts (505) are set on the vertical side of the right side of the support leg positioning plate (502), and a loading and unloading positioning baffle (506) is set through the two locking bolts (505).

5. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The right outrigger positioning support (6), the right outrigger front positioning support (9), and the right outrigger rear positioning support (16) have the same structure and orientation, and are mirror images of the left outrigger positioning support (5) and have the same structure. They include an outrigger positioning base (501), an outrigger positioning upright plate (502), an outrigger auxiliary positioning upright plate (503), an outrigger positioning bolt (504), a locking bolt (505), a loading and unloading positioning baffle (506), and a support positioning plate (507).

6. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The S-shaped component positioning support (7) includes an S-shaped component positioning base (701) provided on the top surface of the base plate (1). The top surface of the S-shaped component positioning base (701) is vertically provided with four S-shaped component positioning side plates (702) arranged in a rectangle. A screw hole is provided through the center of the rear S-shaped component positioning side plate (702), and a tooling switching locking bolt (703) is provided. A tooling switching positioning seat (704) is provided through the tooling switching locking bolt (703).

7. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The front limiting support (10) and the rear limiting support (17) of the outrigger are arranged in a mirror image symmetrically. Both include a leg limiting support base plate (101) provided on the top surface of the base plate (1). A tooling switching positioning block (102) is provided on the rear side of the leg limiting support base plate (101). A leg limiting upright plate (103) is vertically provided on the top surface of the leg limiting support base plate (101) near the left and right sides. A leg limiting upright plate protrusion (104) protruding towards the central auxiliary support (2) is provided on the upper middle position of the leg limiting upright plate (103) near the central auxiliary support (2).

8. The assembly fixture for the vehicle crane underframe as described in claim 1, characterized in that: The front axle sleeve positioning support (11) and the rear axle sleeve positioning support (12) of the balancing mechanism have the same structure. Both include a axle sleeve positioning support base plate (111) provided on the top surface of the base plate (1). Axle sleeve positioning support upright plate (112) is vertically provided on the top surface of the axle sleeve positioning support base plate (111) near its front and rear sides. A balancing mechanism anti-foolproof baffle (113) is provided between the two axle sleeve positioning support upright plates (112) and the top surface of the axle sleeve positioning support base plate (111). A axle sleeve positioning shaft (114) is provided above the balancing mechanism anti-foolproof baffle (113) between the two axle sleeve positioning support upright plates (112).

9. The assembly fixture for the vehicle frame under a crane according to claim 1, characterized in that: The front directional auxiliary support (13) of the balancing mechanism and the rear directional auxiliary support (14) of the balancing mechanism have the same structure and orientation. Both include a directional auxiliary support upright plate (131) provided on the top surface of the base plate (1). A convex directional auxiliary support auxiliary upright plate (132) is provided on the top surface of the directional auxiliary support upright plate (131) near the rear side.

Images