Assembling and positioning structure for auxiliary frame of low-speed logistics vehicle

Abstract

The utility model relates to an assembling and positioning structure of a subframe of a low-speed logistics vehicle, which belongs to the technical field of automobile suspension systems, the subframe comprises a cross beam (1) and a longitudinal beam (2), the cross beam (1) is connected with a mounting bracket (3), the mounting bracket (3) is connected with a longitudinal beam (4) of a vehicle body, the mounting bracket (3) is provided with a positioning mechanism (5), the longitudinal beam (2) is connected with a supporting seat (6), and the supporting seat (6) is provided with a positioning mechanism (6). And the supporting seat (6) is connected with the control arm (7). The third support (14) is provided with a first positioning pin (24), and the fourth support (15) is provided with a second positioning pin (25). Bolts of the auxiliary frame are inserted and pre-tightened through the positioning pins and the vehicle body positioning holes, the bolts are sequentially tightened according to opposite angles, the structure is simple, reliability is high, and the assembling precision of the auxiliary frame is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile suspension system, specifically, the utility model relates to a low-speed logistics vehicle subframe assembly positioning structure. BACKGROUND

[0002] Each link in the automobile production process is strictly controlled in time to improve the production rhythm, while ensuring the vehicle quality. The assembly of the subframe assembly is particularly important, and the assembly precision of the front suspension subframe assembly directly affects the precision of the suspension hard point position. The assembly of the existing low-speed logistics vehicle subframe is generally directly lifted by a tool and directly assembled with the body threaded hole. This assembly method has low efficiency and seriously affects the production rhythm. In order to ensure the assembly with the body, the subframe has multiple mounting holes, and the diameters of the mounting holes except the main positioning hole are large, so the subframe has a risk of shaking, which seriously affects the assembly precision of the subframe.

[0003] The assembly deviation of the subframe is too large, which can easily cause the variation gradient of the toe angle, the wheel camber angle, the kingpin inclination angle and the kingpin caster angle to be inconsistent, which can cause the vehicle to deviate, the tire to wear, and other problems, and cause customer complaints.

[0004] Chinese patent CN212500661U disclosed a rear subframe connecting structure and a rear subframe on February 9, 2021, which connects the cross beam and the longitudinal beam by setting the first and second sleeve parts, improves the matching precision of the front cross beam and the longitudinal beam, and improves the overall quality of the rear subframe, but cannot well solve the assembly precision of the subframe and the body, and the assembled rear subframe still has a risk of shaking. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a low-speed logistics subframe assembly positioning structure with simple structure and high reliability.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0007] A low-speed logistics vehicle subframe assembly positioning structure, the subframe is provided with a mounting bracket, the mounting bracket is provided with a positioning mechanism, and the positioning mechanism is connected with the body longitudinal beam; the subframe is provided with a supporting seat, and the supporting seat is connected with the control arm.

[0008] The positioning mechanism includes a first positioning pin and a second positioning pin, the mounting bracket includes a third bracket and a fourth bracket, the first positioning pin is arranged on the third bracket, and the second positioning pin is arranged on the fourth bracket.

[0009] The auxiliary frame comprises a cross beam and a longitudinal beam, the cross beam comprises a first cross beam and a second cross beam, the longitudinal beam comprises a first longitudinal beam and a second longitudinal beam, one end of the first cross beam is connected with one end of the first longitudinal beam, the other end of the first cross beam is connected with one end of the second longitudinal beam, one end of the second cross beam is connected with the other end of the first longitudinal beam, and the other end of the second cross beam is connected with the other end of the second longitudinal beam.

[0010] The mounting bracket further comprises a first bracket and a second bracket, the first bracket is arranged at one end of the first cross beam, the second bracket is arranged at the other end of the first cross beam, the third bracket is arranged at one end of the second cross beam, and the fourth bracket is arranged at the other end of the second cross beam.

[0011] The body longitudinal beam comprises a first body longitudinal beam and a second body longitudinal beam, the first bracket and the third bracket are respectively connected with two ends of the first body longitudinal beam, and the second bracket and the fourth bracket are respectively connected with two ends of the second body longitudinal beam.

[0012] The support seat comprises a first support seat, a second support seat, a third support seat and a fourth support seat, the control arm comprises a first control arm and a second control arm, one end of the first support seat is connected with the first control arm, the other end of the first support seat is connected with the third support seat, one end of the second support seat is connected with the second control arm, and the other end of the second support seat is connected with the second control arm; the first support seat comprises a bottom plate, support plates are arranged at two ends of the bottom plate, and the first support seat, the second support seat, the third support seat and the fourth support seat are of the same structure.

[0013] The first bracket, the second bracket, the third bracket and the fourth bracket are respectively provided with mounting holes, and the mounting holes of the first bracket, the second bracket, the third bracket and the fourth bracket are provided with two or more than two.

[0014] The first positioning pin is arranged between the two mounting holes of the third bracket, and the second positioning pin is arranged between the two mounting holes of the fourth bracket.

[0015] A threaded pipe is arranged between the first longitudinal beam and the second longitudinal beam, the threaded pipe is connected with the steering machine, the first cross beam is provided with a trailer hook, and radiator brackets are respectively connected with two ends of the first cross beam.

[0016] The first positioning pin comprises a circular base, a circular boss is arranged on the circular base, a first cylinder is connected with the circular boss, a circular table is connected with the first cylinder, a second cylinder is arranged on the circular table, a circular cone is arranged on the second cylinder, and the first positioning pin and the second positioning pin are of the same structure.

[0017] The utility model discloses a technical effect for: the utility model discloses through installing support and car body longitudinal beam connection, support seat and control arm connection, still additionally set up positioning pin on installing support and position can realize preventing the low assembly accuracy of auxiliary frame, prevent causing control arm installing support and steering machine installing support position deviation, have the advantages such as improving auxiliary frame assembly accuracy, improving production rhythm, simple structure, reliability etc. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present specification includes the following drawings, and the shown contents are respectively:

[0019] Figure 1 It is a kind of auxiliary frame assembly positioning structure and the installation structure schematic view of car body.

[0020] Figure 2 It is a kind of structure schematic view of auxiliary frame assembly positioning structure.

[0021] Figure 3 It is Figure 1 The structure schematic view of positioning pin in it.

[0022] Marked as in drawing: 1, crossbeam;2, longitudinal beam;3, installing support;4, car body longitudinal beam;5, positioning mechanism;6, support seat;7, control arm;8, first crossbeam;9, second crossbeam;10, first longitudinal beam;11, second longitudinal beam;12, first support;13, second support;14, third support;15, fourth support;16, first car body longitudinal beam;17, second car body longitudinal beam;18, first support seat;19, second support seat;20, third support seat;21, fourth support seat;22, first control arm;23, second control arm;24, first positioning pin;25, second positioning pin;26, threaded tube;27, round base;28, round boss;29, first cylinder;30, circular platform;31, second cylinder;32, cone;33, connecting block;34, bottom plate;35, support plate;37, radiator support;38, trailer hook. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are further explained in detail by the description of the embodiments with reference to the drawings, and the purpose is to help the technical personnel in the field to have more complete, accurate and in-depth understanding to the inventive concept and technical scheme of the utility model, and help its implementation.

[0024] As Figure 1 And Figure 2As shown, a low-speed logistics vehicle subframe assembly positioning structure is provided. The subframe is provided with a mounting bracket 3, the mounting bracket 3 is provided with a positioning mechanism 5, the positioning mechanism 5 is connected with a vehicle body longitudinal beam 4; the subframe is provided with a support seat 6, the support seat 6 is connected with a control arm 7. The positioning mechanism 5 is welded on the mounting bracket 3 of the subframe, and is positioned in cooperation with a vehicle body positioning hole. The positioning mechanism 5 prevents poor assembly precision of the subframe, and causes the control arm 7 and the steering machine mounting bracket to be offset.

[0025] The positioning mechanism 5 includes a first positioning pin 24 and a second positioning pin 25, the mounting bracket 3 includes a third bracket 14 and a fourth bracket 15, the first positioning pin 24 is arranged on the third bracket 14, and the second positioning pin 25 is arranged on the fourth bracket 15. The first positioning pin 24 is connected with the vehicle body positioning hole on the longitudinal beam 4, the second positioning pin 25 is connected with the vehicle body positioning hole, and the first positioning pin 24 and the second positioning pin 25 play a positioning role.

[0026] The subframe includes a cross beam 1 and a longitudinal beam 2, the cross beam 1 includes a first cross beam 8 and a second cross beam 9, the longitudinal beam 2 includes a first longitudinal beam 10 and a second longitudinal beam 11, one end of the first cross beam 8 is connected with one end of the first longitudinal beam 10, the other end of the first cross beam 8 is connected with one end of the second longitudinal beam 11, one end of the second cross beam 9 is connected with the other end of the first longitudinal beam 10, and the other end of the second cross beam 9 is connected with the other end of the second longitudinal beam 11. The first longitudinal beam 10 and the second longitudinal beam 11 are of the same structure and are straight rod structures, the first cross beam 8 and the second cross beam 9 are of the same structure, the middle part of each of the first cross beam 8 and the second cross beam 9 is a straight rod, and both ends of each of the first cross beam 8 and the second cross beam 9 are provided with a connecting block 33, the end of the connecting block 33 is provided with external threads, and the connecting block 33 is of a cylindrical type.

[0027] The mounting bracket 3 further includes a first bracket 12 and a second bracket 13, the first bracket 12 is arranged at one end of the first cross beam 8, the second bracket 13 is arranged at the other end of the first cross beam 8, the third bracket 14 is arranged at one end of the second cross beam 9, and the fourth bracket 15 is arranged at the other end of the second cross beam 9. In the embodiment, the first bracket 12, the second bracket 13, the third bracket 14 and the fourth bracket 15 are all of flat plate structures, the first bracket 12 and the second bracket 13 are of the same structure and are symmetrically arranged, the mounting is more stable, the third bracket 14 and the fourth bracket 15 are of the same structure and are symmetrically arranged, and the mounting is more stable. The first bracket 12 and the second bracket 13 are welded with the connecting blocks 33 at both ends of the first cross beam 8 respectively, and the third bracket 14 and the fourth bracket 15 are welded with the connecting blocks 33 at both ends of the second cross beam 9 respectively.

[0028] The vehicle body longitudinal beam 4 includes a first vehicle body longitudinal beam 16 and a second vehicle body longitudinal beam 17, the first bracket 12 and the third bracket 14 are connected with both ends of the first vehicle body longitudinal beam 16 respectively, and the second bracket 13 and the fourth bracket 15 are connected with both ends of the second vehicle body longitudinal beam 17 respectively. The first bracket 12 and the third bracket 14 are arranged at upper and lower ends of the first vehicle body longitudinal beam 16 respectively, the second bracket 13 and the fourth bracket 15 are arranged at upper and lower ends of the second vehicle body longitudinal beam 17 respectively, and the first bracket 12, the second bracket 13, the third bracket 14 and the fourth bracket 15 are symmetrically arranged, thereby achieving a better fixing effect.

[0029] The support seat 6 comprises a first support seat 18, a second support seat 19, a third support seat 20 and a fourth support seat 21, the control arm 7 comprises a first control arm 22 and a second control arm 23, the first support seat 18 and the first control arm 22 are connected at one end, the third support seat 20 and the first control arm 22 are connected at the other end, the second support seat 19 and the second control arm 23 are connected at one end, and the second support seat 19 and the second control arm 23 are connected at the other end, the first support seat 18 comprises a bottom plate 34, the bottom plate 34 is provided with support plates 35 at both ends, and the first support seat 18, the second support seat 19, the third support seat 20 and the fourth support seat 21 are the same in structure. In the embodiment, the first support seat 18, the second support seat 19, the third support seat 20 and the fourth support seat 21 are the same in structure, and each comprise a bottom plate 34 and two support plates 35, the bottom plate 34 is bolted with the longitudinal beam 2, the support plates 35 of the first support seat 18 and the support plates 35 of the third support seat 20 are bolted with both ends of the first control arm 22 respectively, and the support plates 35 of the second support seat 19 and the support plates 35 of the fourth support seat 21 are bolted with both ends of the second control arm 23 respectively, so as to effectively control the assembly precision of the first control arm 22 and the second control arm 23, the connection of the support seat 6 and the control arm 7 can optimize the geometric layout of the suspension system, so as to better absorb road vibration and improve ride comfort.

[0030] The first support 12, the second support 13, the third support 14 and the fourth support 15 are respectively provided with mounting holes, and the mounting holes of the first support 12, the second support 13, the third support 14 and the fourth support 15 are provided with two or more than two. Bolts are arranged on the mounting holes, and the first support 12, the second support 13, the third support 14 and the fourth support 15 are connected with the body longitudinal beam 4 through the bolts; the mounting holes of the first support 12, the second support 13, the third support 14 and the fourth support 15 are provided with two or more than two, and the multiple mounting holes are more firm in installation.

[0031] The first positioning pin 24 is arranged between the two mounting holes of the third support 14, and the second positioning pin 25 is arranged between the two mounting holes of the fourth support 15. After the transverse beam 1 and the longitudinal beam 2 are welded, the mounting support 3 is welded on the transverse beam 1 to complete the subframe support, and the positioning mechanism 5 is welded on the subframe support, so that the position deviation of the positioning pin is less than +0.2mm, and the assembly precision of the subframe can be better improved. The body positioning holes are arranged on the first body longitudinal beam 16 and the second body longitudinal beam 17, the subframe is directly lifted by using the tool clamp after the subframe is disassembled with the first control arm 22, the second control arm 23 and the steering machine, the positioning pin is inserted into the body positioning hole, the bolt of the subframe is pre-tightened, and the diagonal is sequentially tightened.

[0032] Threaded pipe 26 is arranged between the first longitudinal beam 10 and the second longitudinal beam 11, and is connected with the steering machine; the first cross beam 8 is provided with a trailer hook 38; the first cross beam 8 is respectively connected with a radiator support 37 at both ends. The threaded pipe 26 is provided with a threaded hole for connecting with the steering machine. The first cross beam 8 is welded with the trailer hook 38 for towing a trailer, and is respectively connected with the radiator support 37 at both ends. The auxiliary frame is connected with the radiator support, thereby providing additional protection for the radiator and providing safety for the vehicle.

[0033] As shown in Figure 3 The first positioning pin 24 comprises a circular base 27, the circular base 27 is provided with a circular boss 28, the circular boss 28 is connected with a first cylinder 29, the first cylinder 29 is connected with a circular table 30, the circular table 30 is provided with a second cylinder 31, the second cylinder 31 is provided with a circular cone 32, and the first positioning pin 24 and the second positioning pin 25 are the same in structure. By arranging the first cylinder 29 and the second cylinder 31 with different sizes, and arranging the circular table 30 and the circular cone 32 between the first cylinder 29 and the second cylinder 31, a special-shaped positioning pin is formed, which has the advantages of easy insertion and good self-centering ability, and realizes more accurate positioning.

[0034] The working principle of the utility model is as follows: one end of the first cross beam 8 is connected with one end of the first longitudinal beam 10, the other end of the first cross beam 8 is connected with one end of the second longitudinal beam 11, one end of the second cross beam 9 is connected with the other end of the first longitudinal beam 10, and the other end of the second cross beam 9 is connected with the other end of the second longitudinal beam 11. The first support 12 is arranged at one end of the first cross beam 8, the second support 13 is arranged at the other end of the first cross beam 8, the third support 14 is arranged at one end of the second cross beam 9, and the fourth support 15 is arranged at the other end of the second cross beam 9. The first support 12 and the third support 14 are respectively connected with both ends of the first vehicle body longitudinal beam 16, and the second support 13 and the fourth support 15 are respectively connected with both ends of the second vehicle body longitudinal beam 17. The first support 12, the second support 13, the third support 14 and the fourth support 15 are respectively provided with mounting holes, the mounting support 3 and the vehicle body longitudinal beam 4 are connected through bolts, the first positioning pin 24 is welded between the two mounting holes of the third support 14, and the second positioning pin 25 is welded between the two mounting holes of the fourth support 15. The positioning pin is inserted into the vehicle body positioning hole, the bolt of the auxiliary frame is pre-tightened, and the diagonal is sequentially tightened. The threaded pipe 26 is arranged between the first longitudinal beam 10 and the second longitudinal beam 11, and is connected with the steering machine; the first cross beam 8 is provided with a trailer hook 38; the first cross beam 8 is respectively connected with a radiator support 37 at both ends. The threaded pipe 26 is provided with a threaded hole for connecting with the steering machine. The first cross beam 8 is welded with the trailer hook 38 for towing a trailer, and is respectively connected with the radiator support 37 at both ends. The auxiliary frame is connected with the radiator support, thereby providing additional protection for the radiator and providing safety for the vehicle.

[0035] The utility model has been described exemplarily above in combination with the drawings. Apparently, the utility model is not limited by the above-mentioned mode in the specific implementation. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A low-speed streamer sub-frame assembly positioning structure, characterized in that: The subframe is provided with a mounting bracket (3), the mounting bracket (3) is provided with a positioning mechanism (5), the positioning mechanism (5) is connected with the body longitudinal beam (4); the subframe is provided with a support seat (6), the support seat (6) is connected with the control arm (7).

2. The low-speed vehicle subframe assembly locating structure of claim 1, wherein: The positioning mechanism (5) comprises a first positioning pin (24) and a second positioning pin (25), the mounting bracket (3) comprises a third bracket (14) and a fourth bracket (15), the first positioning pin (24) is arranged on the third bracket (14), the second positioning pin (25) is arranged on the fourth bracket (15), and the first positioning pin (24) and the second positioning pin (25) are connected with the body positioning hole respectively.

3. The low-speed vehicle subframe assembly locating structure of claim 2, wherein: The subframe comprises a cross beam (1) and a longitudinal beam (2), the cross beam (1) comprises a first cross beam (8) and a second cross beam (9), the longitudinal beam (2) comprises a first longitudinal beam (10) and a second longitudinal beam (11), one end of the first cross beam (8) is connected with one end of the first longitudinal beam (10), the other end of the first cross beam (8) is connected with one end of the second longitudinal beam (11), one end of the second cross beam (9) is connected with the other end of the first longitudinal beam (10), and the other end of the second cross beam (9) is connected with the other end of the second longitudinal beam (11).

4. The low-speed vehicle subframe assembly locating structure of claim 3, wherein: The mounting bracket (3) further comprises a first bracket (12) and a second bracket (13), the first bracket (12) is arranged at one end of the first cross beam (8), the second bracket (13) is arranged at the other end of the first cross beam (8), the third bracket (14) is arranged at one end of the second cross beam (9), and the fourth bracket (15) is arranged at the other end of the second cross beam (9).

5. The low-speed vehicle subframe assembly locating structure of claim 4, wherein: The body longitudinal beam (4) comprises a first body longitudinal beam (16) and a second body longitudinal beam (17), the first bracket (12) and the third bracket (14) are connected with two ends of the first body longitudinal beam (16) respectively, and the second bracket (13) and the fourth bracket (15) are connected with two ends of the second body longitudinal beam (17) respectively.

6. The low-speed vehicle subframe assembly locating structure of claim 5, wherein: The support seat (6) comprises a first support seat (18), a second support seat (19), a third support seat (20) and a fourth support seat (21), the control arm (7) comprises a first control arm (22) and a second control arm (23), one end of the first support seat (18) is connected with the first control arm (22), the other end of the first support seat (18) is connected with the third support seat (20), one end of the second support seat (19) is connected with the second control arm (23), and the other end of the second support seat (19) is connected with the second control arm (23); the first support seat (18) comprises a bottom plate (34), support plates (35) are arranged at two ends of the bottom plate (34), and the first support seat (18), the second support seat (19), the third support seat (20) and the fourth support seat (21) are the same in structure.

7. The low-speed vehicle subframe assembly locating structure of any one of claims 4-6, wherein: The first bracket (12), the second bracket (13), the third bracket (14) and the fourth bracket (15) are respectively provided with mounting holes, and the mounting holes of the first bracket (12), the second bracket (13), the third bracket (14) and the fourth bracket (15) are provided with two or more than two.

8. The low-speed vehicle subframe assembly locating structure of claim 7, wherein: The first positioning pin (24) is arranged between two mounting holes of the third support (14), and the second positioning pin (25) is arranged between two mounting holes of the fourth support (15).

9. The low-speed vehicle subframe assembly locating structure of any one of claims 3-6, wherein: Threaded pipes (26) are arranged between the first longitudinal beam (10) and the second longitudinal beam (11), and the threaded pipes (26) are connected with a steering engine; the first cross beam (8) is provided with a trailer hook (38); heat radiator supports (37) are respectively connected to two ends of the first cross beam (8).

10. The low-speed vehicle subframe assembly locating structure of claim 8, wherein: The first positioning pin (24) comprises a circular base (27), a circular boss (28) is arranged on the circular base (27), a first cylinder (29) is connected with the circular boss (28), a circular truncated cone (30) is connected with the first cylinder (29), a second cylinder (31) is arranged on the circular truncated cone (30), a circular cone (32) is arranged on the second cylinder (31), and the first positioning pin (24) and the second positioning pin (25) are of the same structure.

Images