Swing arm assembly, connecting structure of auxiliary frame and vehicle body and vehicle

Abstract

The utility model belongs to the field of connection between a vehicle body and a vehicle frame, and particularly relates to a swing arm assembly, a connecting structure of an auxiliary vehicle frame and the vehicle body and a vehicle. In order to avoid relative movement between an auxiliary frame and a vehicle body at the lowest cost, the utility model provides a swing arm assembly and a connecting structure of the auxiliary frame and the vehicle body. In the connecting structure, the auxiliary frame is provided with a main bolt, the face, abutting against the automobile body, of the auxiliary frame forms an abutting face, the auxiliary frame is further sleeved with a connecting piece, the connecting piece and the automobile body are provided with threaded connecting structures for connecting the connecting piece and the automobile body in a threaded mode, and the face, used for abutting against the automobile body, of the connecting piece is flush with the abutting face. The utility model further provides a vehicle using the connecting structure of the swing arm assembly, the auxiliary frame and the vehicle body. On the premise that the structure of the auxiliary frame and the relative position of the auxiliary frame and the automobile body are not changed, the connecting piece is arranged on the auxiliary frame in a sleeving mode, the automobile body is in threaded connection with the connecting piece, and therefore relative movement between the auxiliary frame and the automobile body is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of connection between a vehicle body and a vehicle frame, and particularly relates to a swing arm assembly, a connection structure between a sub-frame and a vehicle body, and a vehicle. Background Art

[0002] In the existing connection structure of the swing arm assembly, subframe and body, the subframe and body have four mounting points, among which, at the two front mounting points at the front end, the body is welded with studs, holes are opened on the subframe, and the subframe and body are bolted together by nuts; Figure 1 As shown, at the two rear mounting points of the rear end, the subframe 3 has its own bolts (i.e., main bolts 2). Nuts and bolts (i.e., main bolts 2) are used to bolt the subframe 3 and the swing arm assembly 4 to the vehicle body 1. The surface of the subframe 3 that abuts the vehicle body 1 constitutes the abutment surface. Bolted connections are a basic type of threaded connections.

[0003] When driving a vehicle in the prior art through an uneven road section, the tire will be subjected to a large impact force, and the force transmitted from the tire to the rear mounting point through the swing arm assembly is relatively large, resulting in relative movement between the subframe and the body. The relative movement between the subframe and the body will cause the vehicle to produce a "clattering" noise, affecting the driving experience.

[0004] In order to avoid relative movement between the subframe and the vehicle body, the existing technology generally adopts the following two methods to solve the problem:

[0005] The first one: increase the maximum friction between the subframe and the vehicle body.

[0006] For example, a Chinese invention patent application with application publication number CN115556832A and application publication date 2023.01.03 discloses a connection device between a vehicle subframe and a vehicle body. Between the subframe and the body, a sleeve embedded in the subframe is added, and the end of the sleeve that abuts the body has a raised portion for increasing the friction between the sleeve and the body, thereby avoiding relative movement between the subframe and the body and generating abnormal noise.

[0007] The second method: increase the number of rear installation points.

[0008] In one approach, the number of rear mounting points can be directly increased on the subframe. In this case, the mold of the subframe needs to be redesigned, which is costly.

[0009] Alternatively, a connecting bracket can be provided between the subframe and the vehicle body to increase the number of rear mounting points. For example, Chinese utility model patent No. CN217435837U, dated September 16, 2022, discloses a connecting bracket between a subframe and a vehicle body. The connecting bracket includes a nut seat for securing the subframe and four through-holes for securing the vehicle body.

[0010] However, on the one hand, the structure in the above utility model patent is different from Figure 1 On the other hand, since the connecting bracket has a certain thickness, the connecting bracket will increase the distance between the body and the subframe, which will require redesigning the layout of other vehicle structures. Utility Model Content

[0011] The purpose of the utility model is to provide a connection structure of a swing arm assembly, a subframe and a vehicle body, so as to solve the technical problem that in the existing connection structure of the swing arm assembly, the subframe and the vehicle body, relative movement occurs between the subframe and the vehicle body, thereby generating abnormal noise.

[0012] The purpose of the present utility model is also to provide a vehicle to solve the same technical problem as above.

[0013] The technical solution of the connection structure of the swing arm assembly, subframe and vehicle body of the utility model is:

[0014] A connection structure of a swing arm assembly, a subframe and a vehicle body, comprising a swing arm assembly, a subframe and a vehicle body, wherein the subframe is provided with main bolts for bolting the swing arm assembly, the subframe and the vehicle body, and a side of the subframe abutting the vehicle body constitutes an abutment surface, and a connecting piece is also mounted on the subframe, and the connecting piece and the vehicle body are provided with at least one set of threaded connection structures for threading the connecting piece and the vehicle body, and a side of the connecting piece for abutting the vehicle body is flush with the abutment surface.

[0015] Furthermore, the connecting member is provided with at least one connecting member through-hole, and the body is provided with at least one body through-hole, and each connecting member through-hole corresponds to each body through-hole one by one, and the secondary bolt passes through the corresponding connecting member through-hole and the body through-hole and is connected with a nut, and the corresponding connecting member through-hole, body through-hole, secondary bolt and nut together constitute a group of bolt connection structure, and the bolt connection structure constitutes the said threaded connection structure.

[0016] Furthermore, the connecting member is provided with at least one connecting member through-hole, the body is provided with at least one body through-hole, and each connecting member through-hole corresponds to each body through-hole one by one, the studs pass through the corresponding connecting member through-holes and the body through-holes, and nuts are connected to both ends of the studs, the corresponding connecting member through-holes, the body through-holes, the studs and the nuts together constitute a group of stud connection structures, and the stud connection structures constitute the said threaded connection structure.

[0017] Furthermore, it is characterized in that a first threaded connection structure and a second threaded connection structure are respectively provided on both sides of the main bolt, and the main bolt is located on the center line of the line connecting the first threaded connection structure and the second threaded connection structure.

[0018] Furthermore, the connecting member is a trapezoidal connecting plate, which is provided with a mounting hole for mounting the trapezoidal connecting plate on the subframe. The mounting hole is arranged near the center of the bottom of the trapezoidal connecting plate, and threaded connection structures are provided on both sides of the bottom of the trapezoidal connecting plate.

[0019] Furthermore, the shape of the trapezoidal connecting plate is an isosceles trapezoid.

[0020] Furthermore, each vertex of the trapezoidal connecting plate is rounded.

[0021] Furthermore, the number of the threaded connection structures is at least two groups.

[0022] Furthermore, the connecting piece is a connecting plate.

[0023] The beneficial effects of the swing arm assembly, subframe, and vehicle body connection structure of the present invention are as follows: This invention is an improved invention. Based on the existing technology, a connector is mounted on the subframe and the connector and vehicle body are threadedly connected via a threaded connection structure. Compared to the existing technical solutions that only have a main bolt as a single mounting point, each threaded connection between the connector and the vehicle body constitutes a mounting point, effectively increasing the number of mounting points and thus preventing abnormal noise caused by relative movement between the subframe and vehicle body.

[0024] In the present invention, the structure of the subframe remains unchanged, and there is no need to redesign the mold of the subframe. At the same time, the side of the connecting piece that contacts the vehicle body is flush with the contact surface, that is, the relative positional relationship between the vehicle body and the subframe remains unchanged, so there is no need to redesign the layout of other vehicle structures. This can solve the technical problem of abnormal noise caused by relative movement between the subframe and the vehicle body at the lowest cost.

[0025] The technical solution of the utility model vehicle is:

[0026] A vehicle includes a swing arm assembly, a connecting structure of a subframe and a vehicle body, wherein the connecting structure of the swing arm assembly, the subframe and the vehicle body includes the swing arm assembly, the subframe and the vehicle body, the subframe is provided with main bolts for bolting the swing arm assembly, the subframe and the vehicle body, the side of the subframe abutting the vehicle body constitutes an abutment surface, the subframe is also provided with a connecting piece, the connecting piece and the vehicle body are provided with at least one set of threaded connection structures for threading the connecting piece and the vehicle body, and the side of the connecting piece for abutting the vehicle body is flush with the abutment surface.

[0027] Furthermore, the connecting member is provided with at least one connecting member through-hole, and the body is provided with at least one body through-hole, and each connecting member through-hole corresponds to each body through-hole one by one, and the secondary bolt passes through the corresponding connecting member through-hole and the body through-hole and is connected with a nut, and the corresponding connecting member through-hole, body through-hole, secondary bolt and nut together constitute a group of bolt connection structure, and the bolt connection structure constitutes the said threaded connection structure.

[0028] Furthermore, the connecting member is provided with at least one connecting member through-hole, the body is provided with at least one body through-hole, and each connecting member through-hole corresponds to each body through-hole one by one, the studs pass through the corresponding connecting member through-holes and the body through-holes, and nuts are connected to both ends of the studs, the corresponding connecting member through-holes, the body through-holes, the studs and the nuts together constitute a group of stud connection structures, and the stud connection structures constitute the said threaded connection structure.

[0029] Furthermore, it is characterized in that a first threaded connection structure and a second threaded connection structure are respectively provided on both sides of the main bolt, and the main bolt is located on the center line of the line connecting the first threaded connection structure and the second threaded connection structure.

[0030] Furthermore, the connecting member is a trapezoidal connecting plate, which is provided with a mounting hole for mounting the trapezoidal connecting plate on the subframe. The mounting hole is arranged near the center of the bottom of the trapezoidal connecting plate, and threaded connection structures are provided on both sides of the bottom of the trapezoidal connecting plate.

[0031] Furthermore, the shape of the trapezoidal connecting plate is an isosceles trapezoid.

[0032] Furthermore, each vertex of the trapezoidal connecting plate is rounded.

[0033] Furthermore, the number of the threaded connection structures is at least two groups.

[0034] Furthermore, the connecting piece is a connecting plate.

[0035] The beneficial effects of the vehicle of the present utility model are as follows: the present utility model is an improved invention. Based on the existing technology, the connector is mounted on the subframe, and the connector and the vehicle body are threadedly connected via a threaded connection structure. Compared with the technical solution of the prior art that only has a main bolt as a mounting point, each threaded connection between the connector and the vehicle body constitutes a mounting point, which can effectively increase the number of mounting points, thereby preventing abnormal noise caused by relative movement between the subframe and the vehicle body.

[0036] In the present invention, the structure of the subframe remains unchanged, and there is no need to redesign the mold of the subframe. At the same time, the side of the connecting piece that contacts the vehicle body is flush with the contact surface, that is, the relative positional relationship between the vehicle body and the subframe remains unchanged, so there is no need to redesign the layout of other vehicle structures. This can solve the technical problem of abnormal noise caused by relative movement between the subframe and the vehicle body at the lowest cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural diagram of the connection structure of the swing arm assembly, subframe and body in the prior art;

[0038] Figure 2 This is a schematic structural diagram of the connection structure of the swing arm assembly, subframe and vehicle body of the present invention;

[0039] Figure 3 This is a schematic structural diagram of the connection structure of the swing arm assembly, subframe and vehicle body of the present invention, with the vehicle body omitted;

[0040] Figure 4 It is a structural schematic diagram of the connecting plate in the connecting structure of the swing arm assembly, subframe and body of the utility model.

[0041] Description of reference numerals:

[0042] 1. Vehicle body; 2. Main bolts; 3. Subframe; 31. Abutment surface; 4. Swing arm assembly; 5. Trapezoidal connecting plate; 51. Connector through-hole; 52. Mounting hole; 6. Sub-bolts. DETAILED DESCRIPTION

[0043] In order to solve the problems in the background technology, the core inventive concept of the present invention is: without changing the subframe structure and the relative position between the subframe and the vehicle body, a connecting piece is mounted on the subframe, and the vehicle body is threadedly connected to the connecting piece, thereby preventing relative movement between the subframe and the vehicle body.

[0044] The present invention is further described in detail below with reference to the embodiments.

[0045] Specific embodiments of the connection structure of the swing arm assembly, subframe and vehicle body provided by the utility model:

[0046] like Figure 2-4As shown, as a basic specific implementation method, the connection structure of the swing arm assembly, the subframe and the vehicle body includes a swing arm assembly 4, a subframe 3 and a vehicle body 1. The subframe 3 is provided with a main bolt 2 for bolting the swing arm assembly 4, the subframe 3 and the vehicle body 1. The side of the subframe 3 abutting the vehicle body 1 constitutes an abutment surface 31. The subframe 3 is also provided with a connecting piece. The connecting piece and the vehicle body 1 are provided with at least one set of threaded connection structures for threading the connecting piece to the vehicle body 1, and the side of the connecting piece for abutting the vehicle body 1 is flush with the abutment surface 31.

[0047] Among them, the connecting piece is preferably a connecting plate with a mounting hole 52, but it can also be a connecting sleeve, a connecting block with a mounting hole 52, or other structures, as long as the connecting piece can be sleeved on the subframe 3. The number of threaded connection structures can be one group, two groups, or more. This number can be determined according to the specifications of the bolts or studs used in the threaded connection structure. For example, when the number of threaded connection structures is one group, the specifications of the bolts or studs used in the threaded connection structure are larger, thereby ensuring that the threaded connection structure has a sufficiently large pre-tightening force, and further ensuring that no relative movement occurs between the subframe 3 and the vehicle body 1 when the vehicle passes through an uneven road section. In a preferred embodiment, the number of threaded connection structures is at least two groups. Preferably, the number of threaded connection structures is two groups, the structure is simple, and the bolts or studs used in the threaded connection structure are of common specifications ( Figure 2 The specification of the main bolt 2 is M16, and the specification of the auxiliary bolt 6 is M12, but bolts of other specifications can also be selected according to actual conditions).

[0048] like Figure 1-4 As shown, on the basis of the existing technology, the connecting piece is mounted on the subframe 3, and the connecting piece and the vehicle body 1 are threadedly connected through a threaded connection structure. Compared with the technical solution in the existing technology that only has one installation point where the main bolt 2 is located, each threaded connection between the connecting piece and the vehicle body 1 constitutes an installation point, which can effectively increase the number of installation points, thereby avoiding relative movement between the subframe 3 and the vehicle body 1 and generating abnormal noise.

[0049] In the present invention, the structure of the subframe 3 remains unchanged, and there is no need to redesign the mold of the subframe 3. At the same time, the side of the connector that contacts the vehicle body 1 is flush with the contact surface 31, that is, the relative positional relationship between the vehicle body 1 and the subframe 3 remains unchanged. Therefore, there is no need to redesign the layout of other vehicle structures, and the technical problem of abnormal noise caused by relative movement between the subframe 3 and the vehicle body 1 can be solved at the lowest cost.

[0050] In order to adapt to various connectors of different specifications, the specific improvements to the threaded connection structure are as follows:

[0051] like Figure 2-4As shown, as an improved first type of specific embodiment, the connecting member is provided with at least one connecting member through-hole 51, and the body 1 is provided with at least one body through-hole, and each connecting member through-hole 51 corresponds to each body through-hole one by one, and the auxiliary bolt 6 passes through the corresponding connecting member through-hole 51 and the body through-hole and is connected with a nut, and the corresponding connecting member through-hole 51, the body through-hole, the auxiliary bolt 6 and the nut together constitute a group of bolt connection structure, and the bolt connection structure constitutes the threaded connection structure, which has a simple structure.

[0052] Reference Figure 2-4 As shown, as an improved second type of specific embodiment, the connector is provided with at least one connector through-hole 51, the vehicle body 1 is provided with at least one vehicle body through-hole, and each connector through-hole 51 corresponds to each vehicle body through-hole one by one, the stud passes through the corresponding connector through-hole 51 and the vehicle body through-hole, and nuts are connected to both ends of the stud, the corresponding connector through-hole 51, the vehicle body through-hole, the stud and the nut together constitute a group of stud connection structure, and the stud connection structure constitutes the said threaded connection structure.

[0053] In the above two specific embodiments, since threaded holes do not need to be machined on the connectors, there is no requirement for connector thickness, and various connectors of different specifications can be accommodated. Furthermore, compared to the prior art, the structure of the body 1 in the present invention does not undergo significant changes; only a few body holes need to be machined on the basis of the existing body.

[0054] Reference Figure 2-4 As shown, in the inferior third type of specific embodiment, the connecting member has a sufficient thickness and is provided with at least one threaded hole, the body 1 is provided with at least one body through-hole, and each threaded hole corresponds to each body through-hole one by one, and the auxiliary bolt 6 passes through the body through-hole and is threadedly engaged with the threaded hole, or, one end of the stud is threadedly engaged with the threaded hole, and the other end is connected to a nut after passing through the body through-hole.

[0055] In order to facilitate installation, the specific location of the threaded connection structure is improved as follows:

[0056] like Figure 2-4 As shown, in the preferred fourth embodiment, a first threaded connection structure and a second threaded connection structure are provided on both sides of the main bolt 2, and the main bolt 2 is located on the midline of the line connecting the first threaded connection structure and the second threaded connection structure. When installing the connector, there is no need to distinguish the front and back of the connector, which facilitates installation.

[0057] Reference Figure 2-4 As shown, in the inferior fifth embodiment, the first threaded connection structure and the second threaded connection structure are at different distances from the main bolt 2 , and when installing the connection piece, it is necessary to distinguish the front and back of the connection piece.

[0058] In order to save raw materials and save costs, the specific improvements to the connectors are as follows:

[0059] like Figure 2-4 As shown, as a preferred fifth embodiment, the connector is a trapezoidal connector plate 5. The trapezoidal connector plate 5 is provided with a mounting hole 52 for attaching the trapezoidal connector plate 5 to the subframe 3. The mounting hole 52 is located near the center of the upper base of the trapezoidal connector plate 5, and threaded connection structures are provided on both sides of the lower base of the trapezoidal connector plate 5. Preferably, the trapezoidal connector plate 5 is shaped like an isosceles trapezoid, with the angle between the upper base and the hypotenuse being 135°, and the angle between the lower base and the hypotenuse being 45°. This ensures sufficient strength for the connector while conserving raw materials and reducing costs. In different embodiments, the trapezoidal connector plate 5 may also be shaped like a right-angled trapezoid or other trapezoidal shape.

[0060] Reference Figure 2-4 As shown, as a relatively inferior sixth embodiment, the connecting member can also be a rectangular connecting plate or other structure. In this case, more raw materials are used for the connecting member.

[0061] To prevent the connector from injuring people during installation, the specific improvements to the trapezoidal connecting plate 5 are as follows:

[0062] like Figure 2-4 As shown, as a preferred seventh embodiment, each vertex of the trapezoidal connecting plate 5 is rounded, thereby preventing the trapezoidal connecting plate 5 from injuring people.

[0063] Reference Figure 2-4 As shown, in the inferior eighth embodiment, each vertex of the trapezoidal connecting plate 5 is a sharp angle, and the staff needs to wear protective gear to avoid being injured by the trapezoidal connecting plate 5.

[0064] The specific embodiment of the vehicle provided by the utility model:

[0065] Reference Figure 2-4 As shown, in the prior art, a vehicle includes two front mounting points and two rear mounting points. In the present invention, the vehicle includes two front mounting points and two swing arm assemblies, a subframe, and a vehicle body connection structure. In any swing arm assembly, subframe, and vehicle body connection structure, the location of the main bolt 2 constitutes a main mounting point, and each threaded connection between the connector and the vehicle body 1 constitutes a mounting point, thereby increasing the number of mounting points and preventing abnormal noise caused by relative movement between the subframe 3 and the vehicle body 1.

[0066] like Figure 2As shown, the preload force provided by the M16 main bolt 2 is approximately 85,000 N, and the preload force provided by the two M12 auxiliary bolts 6 is approximately 90,000 N, effectively preventing relative movement between the subframe 3 and the vehicle body 1. Of course, the specific specifications of the main bolts 2 and auxiliary bolts 6 can be changed according to actual needs.

[0067] The specific structure of the connection structure between the swing arm assembly, the subframe and the vehicle body is the same as the specific structure of any one of the specific embodiments of the connection structure between the swing arm assembly, the subframe and the vehicle body of the present invention, and will not be repeated here.

[0068] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents, or organically combine different types of specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A connection structure of a swing arm assembly, a subframe and a vehicle body, comprising a swing arm assembly, a subframe and a vehicle body, wherein the subframe has main bolts for bolting the swing arm assembly, the subframe and the vehicle body together, and a surface of the subframe abutting the vehicle body constitutes an abutment surface, characterized in that: The auxiliary frame is also provided with a connecting piece, and the connecting piece and the body are provided with at least one set of threaded connection structures for threading the connecting piece and the body, and the side of the connecting piece used for abutting the body is flush with the abutting surface.

2. The connection structure of the swing arm assembly, subframe and vehicle body according to claim 1, characterized in that: The connecting piece is provided with at least one connecting piece through-hole, and the body is provided with at least one body through-hole, and each connecting piece through-hole corresponds to each body through-hole one by one. The secondary bolt passes through the corresponding connecting piece through-hole and the body through-hole and is connected with a nut. The corresponding connecting piece through-hole, the body through-hole, the secondary bolt and the nut together constitute a group of bolt connection structure, and the bolt connection structure constitutes the said threaded connection structure.

3. The connection structure of the swing arm assembly, subframe and vehicle body according to claim 1, characterized in that: The connecting piece is provided with at least one connecting piece through-hole, and the body is provided with at least one body through-hole, and each connecting piece through-hole corresponds to each body through-hole one by one, and the studs pass through the corresponding connecting piece through-holes and body through-holes, and nuts are connected to both ends of the studs. The corresponding connecting piece through-holes, body through-holes, studs and nuts together constitute a group of stud connection structures, and the stud connection structure constitutes the said threaded connection structure.

4. The connection structure of the swing arm assembly, subframe and vehicle body according to any one of claims 1 to 3, characterized in that: A first threaded connection structure and a second threaded connection structure are respectively provided on both sides of the main bolt, and the main bolt is located on the center line of the line connecting the first threaded connection structure and the second threaded connection structure.

5. The connection structure of the swing arm assembly, the subframe and the vehicle body according to claim 4, characterized in that: The connecting piece is a trapezoidal connecting plate, which is provided with a mounting hole for fitting the trapezoidal connecting plate onto the subframe. The mounting hole is arranged near the center of the bottom of the trapezoidal connecting plate, and threaded connection structures are provided on both sides of the bottom of the trapezoidal connecting plate.

6. The connection structure of the swing arm assembly, the subframe and the vehicle body according to claim 5, characterized in that: The shape of the trapezoidal connecting plate is an isosceles trapezoid.

7. The connection structure of the swing arm assembly, the subframe and the vehicle body according to claim 5, characterized in that: Each top corner of the trapezoidal connecting plate is rounded.

8. The connection structure of the swing arm assembly, the subframe and the vehicle body according to any one of claims 1 to 3, characterized in that: The number of the threaded connection structures is at least two groups.

9. The connection structure of the swing arm assembly, the subframe and the vehicle body according to any one of claims 1 to 3, characterized in that: The connecting piece is a connecting plate.

10. A vehicle, characterized in that: The invention comprises a swing arm assembly as described in any one of claims 1 to 9, and a connecting structure between a subframe and a vehicle body.

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