Suspension swing arm connecting structure

Abstract

The utility model discloses a suspension swing arm connecting structure which comprises a swing arm, a spherical hinge and a suspension supporting piece, one end of the swing arm is connected with a frame through the spherical hinge, and the other end of the swing arm is connected with a wheel through the suspension supporting piece. The end, connected with the suspension supporting piece, of the swing arm comprises a first connecting sleeve and a second connecting sleeve which are arranged in a spaced mode, the suspension supporting piece is arranged between the first connecting sleeve and the second connecting sleeve, and the first connecting sleeve, the suspension supporting piece and the second connecting sleeve are connected through pin shafts. A first oil seal is arranged at the end, close to the suspension supporting piece, of the first connecting sleeve, and a second oil seal is arranged at the end, close to the suspension supporting piece, of the second connecting sleeve. And the first connecting sleeve and the second connecting sleeve are rotationally connected to the pin shaft. According to the suspension swing arm connecting structure, foreign matters such as silt generated in the running process of a vehicle are prevented from polluting the oil seal, and the service life of the oil seal is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle suspension, in particular to a suspension swing arm connection structure. Background Art

[0002] The swing arm is a very important component in the automobile suspension structure. The swing arm is a guiding device in the vehicle's suspension structure. One end of the swing arm is connected to the frame or body through a rubber bushing, and the other end is connected to the vehicle's wheel.

[0003] In the prior art, reference Figures 1 to 3 , there are two swing arms 02, which are arranged on both sides of the suspension support 03. One end of the swing arm 02 is fixedly connected to the ball joint 01, and the other end is connected to the suspension support 03 through the pin 08. The ball joint 01 is connected to the frame and plays a buffering role. The end through hole of the suspension support 03 is rotatably connected to the pin 08 through two bearings 06. The outer ring of the bearing 06 cooperates with the suspension support 03, and the inner ring cooperates with the pin 08, so that the suspension support 03 is rotatably arranged on the pin 08. In order to limit the bearing 06, a spacer 07 is arranged between the two bearings 06, and a base 04 is arranged at one end of the two bearings 06 away from each other. The base 04 is sleeved on the pin 08. An oil seal 05 is arranged in the gap between the base 04 and the suspension support 03. The outer diameter of the oil seal 05 is fixed to the suspension support 03, and the inner diameter of the oil seal 05 contacts the outer side surface of the base 04, which plays a role in preventing foreign objects from entering. The fastener 09 is connected to the tail end of the pin 08 to securely connect the components.

[0004] The oil seal 05 at the end of the swing arm 02 in the prior art is arranged at both ends of the end through hole of the suspension support 03. The oil seal 05 is exposed and directly contacts with external foreign matter. It will be worn out after long-term use, and the risk of water leakage is high. Moreover, since the oil seals 05 on both sides are exposed, the mud and sand stirred up by the vehicle during driving will be thrown onto the oil seal 05, increasing the risk of failure. Utility Model Content

[0005] In view of this, the utility model provides a suspension swing arm connection structure, which prevents foreign matter such as mud and sand stirred up by the vehicle during driving from contaminating the oil seal, thereby extending the service life of the oil seal.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A suspension swing arm connection structure includes a swing arm, a ball joint and a suspension support member, one end of the swing arm is connected to a vehicle frame via the ball joint, and the other end is connected to a wheel via the suspension support member, the end of the swing arm connected to the suspension support member includes a first connecting sleeve and a second connecting sleeve that are spaced apart, the suspension support member is arranged between the first connecting sleeve and the second connecting sleeve, the first connecting sleeve, the suspension support member and the second connecting sleeve are connected via a pin shaft; a first oil seal is provided at an end of the first connecting sleeve close to the suspension support member, and a second oil seal is provided at an end of the second connecting sleeve close to the suspension support member; the first connecting sleeve and the second connecting sleeve are rotatably connected to the pin shaft.

[0008] Optionally, the first connecting sleeve is a sleeve structure with one end sealed and the other end open, the open end of the first connecting sleeve is arranged close to the suspension support member, and the first oil seal is arranged at the open end of the first connecting sleeve;

[0009] The second connecting sleeve is a sleeve structure with openings at both ends. The second oil seal is arranged at the opening of one end of the second connecting sleeve close to the suspension support member, and a sealing positioning structure is arranged at the opening of one end of the second connecting sleeve away from the suspension support member.

[0010] Optionally, a first bearing is provided in the inner cavity of the first connecting sleeve, and the first connecting sleeve is rotatably connected to the pin shaft through the first bearing; a second bearing is provided in the inner cavity of the second connecting sleeve, and the second connecting sleeve is rotatably connected to the pin shaft through the second bearing.

[0011] Optionally, the sealing positioning structure includes a sealing block connected to the inner cavity of the second connecting sleeve, one end of the sealing block is in contact with the second bearing, and the other end is connected to the sealing cover plate.

[0012] Optionally, the blocking block is threadedly connected to the inner cavity of the second connecting sleeve, the sealing cover plate is connected to the blocking block via connecting screws, and the diameter of the sealing cover plate is larger than the diameter of the blocking block.

[0013] Optionally, the first bearing and the second bearing are both tapered roller bearings, and the first bearing and the second bearing are arranged back to back.

[0014] Optionally, the pin shaft comprises a first shaft segment, a second shaft segment, a third shaft segment and a fourth shaft segment which are sequentially connected, the diameter of the second shaft segment is larger than the diameter of the first shaft segment, the diameter of the third shaft segment is larger than the diameter of the second shaft segment, and the diameter of the fourth shaft segment is smaller than the diameter of the third shaft segment;

[0015] The first shaft segment is arranged in the inner cavity of the first connecting sleeve, the second shaft segment is arranged between the first connecting sleeve and the second connecting sleeve, and the third shaft segment and the fourth shaft segment are arranged in the inner cavity of the second connecting sleeve.

[0016] Optionally, the first bearing is cooperatively connected to the first shaft segment, the second bearing is cooperatively connected to the fourth shaft segment, and the second oil seal sleeve is arranged on the third shaft segment.

[0017] Optionally, a ring seat is provided on the fixed sleeve of the first shaft section, and the ring seat is arranged between the first bearing and the suspension support member, and one side of the ring seat contacts the first bearing, and the other side contacts the suspension support member;

[0018] The outer side surface of the ring seat is sleeved with a first oil seal.

[0019] Optionally, the swing arm is a V-shaped structure, the end of the swing arm connected to the suspension support is the top position of the V-shaped structure, and the two ends of the opening position of the V-shaped structure are respectively connected to a ball joint;

[0020] The first oil seal and the second oil seal are both double-lip oil seals.

[0021] It can be seen from the above technical scheme that the suspension swing arm connection structure provided by the utility model is achieved by setting the end portion of the swing arm connected to the suspension support member to a structure including a first connecting sleeve and a second connecting sleeve, the portion where the suspension support member is connected to the swing arm is set between the first connecting sleeve and the second connecting sleeve, the suspension support member is connected to the first connecting sleeve and the second connecting sleeve through a pin shaft, and at the same time, a first oil seal is set at the end of the first connecting sleeve close to the suspension support member, and a second oil seal is set at the end of the second connecting sleeve close to the suspension support member, the first oil seal and the second oil seal are set in the swing arm, and due to the obstruction of the suspension support member between the first connecting sleeve and the second connecting sleeve, the first oil seal and the second oil seal do not directly contact external foreign matter, foreign matter such as mud and sand stirred up by the vehicle during driving will not contaminate the oil seal, thereby avoiding oil seal failure caused by foreign matter and extending the service life of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a suspension swing arm connection structure in the prior art;

[0024] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a suspension swing arm connection structure along the AA position in the prior art;

[0025] Figure 3 for Figure 2 A schematic diagram of the partial enlarged structure of part B in FIG.

[0026] Figure 4 A structural schematic diagram of a suspension swing arm connection structure provided by an embodiment of the utility model at an angle;

[0027] Figure 5 A structural schematic diagram of a suspension swing arm connection structure provided by an embodiment of the utility model from another angle;

[0028] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at the CC position;

[0029] Figure 7 A schematic diagram of the structure of the pin provided in the embodiment of the utility model;

[0030] Figure 8 This is a schematic cross-sectional structural diagram of a pin shaft provided in an embodiment of the utility model.

[0031] in:

[0032] 01. Ball joint; 02. Swing arm; 03. Suspension support; 04. Base; 05. Oil seal; 06. Bearing; 07. Spacer; 08. Pin; 09. Fastener;

[0033] 1. Ball hinge;

[0034] 2. Swing arm;

[0035] 201, first connecting sleeve; 202, second connecting sleeve;

[0036] 3. Suspension support parts;

[0037] 4. The first bearing;

[0038] 5. First oil seal;

[0039] 6. Ring seat;

[0040] 7. Pin;

[0041] 701, first shaft section; 702, second shaft section; 703, third shaft section; 704, fourth shaft section;

[0042] 8. Second oil seal;

[0043] 9. Second bearing;

[0044] 10. Blocking block;

[0045] 11. Sealing cover plate;

[0046] 12. Connecting screws. DETAILED DESCRIPTION

[0047] The utility model discloses a suspension swing arm connection structure, which prevents foreign matter such as mud and sand stirred up during the running of a vehicle from polluting an oil seal, thereby extending the service life of the oil seal.

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] See also Figures 4 to 6 The suspension swing arm connection structure of the utility model comprises a swing arm 2, a ball joint 1 and a suspension support 3. One end of the swing arm 2 is connected to the vehicle frame through the ball joint 1, and the other end is connected to the wheel through the suspension support 3. The end of the swing arm 2 connected to the suspension support 3 comprises a first connecting sleeve 201 and a second connecting sleeve 202 arranged at intervals. The end of the suspension support 3 used for connecting to the swing arm 2 is arranged between the first connecting sleeve 201 and the second connecting sleeve 202. The first connecting sleeve 201, the suspension support 3 and the second connecting sleeve 202 are connected together by a pin 7. A first oil seal 5 is arranged at the end of the first connecting sleeve 201 close to the suspension support 3, and a second oil seal 8 is arranged at the end of the second connecting sleeve 202 close to the suspension support 3; the first connecting sleeve 201 and the second connecting sleeve 202 are rotatably connected to the pin 7.

[0050] The suspension swing arm connection structure of the utility model is configured such that the end portion where the swing arm 2 is connected to the suspension support member 3 is configured to include a first connection sleeve 201 and a second connection sleeve 202. The portion where the suspension support member 3 is connected to the swing arm 2 is configured between the first connection sleeve 201 and the second connection sleeve 202. The suspension support member 3 is connected to the first connection sleeve 201 and the second connection sleeve 202 through a pin shaft 7. Meanwhile, a first oil seal 5 is configured at an end portion of the first connection sleeve 201 close to the suspension support member 3, and a second oil seal 8 is configured at an end portion of the second connection sleeve 202 close to the suspension support member 3. That is, the first oil seal 5 and the second oil seal 8 are configured in the swing arm 2. Due to the obstruction of the suspension support member 3 between the first connection sleeve 201 and the second connection sleeve 202, the first oil seal 5 and the second oil seal 8 do not directly contact external foreign matter. Foreign matter such as mud and sand stirred up by the vehicle during driving will not contaminate the oil seal, thereby avoiding failure of the oil seal caused by foreign matter and extending the service life of the oil seal.

[0051] Specifically, in order to facilitate the installation of the pin shaft 7, the first connecting sleeve 201 is a sleeve structure with one end sealed and the other end open. Figure 6 As shown, the open end of the first connecting sleeve 201 is arranged close to the suspension support member 3, and the open end of the first connecting sleeve 201 is provided with a first oil seal 5, and the first oil seal 5 is used to seal the gap at the open end of the first connecting sleeve 201. In order to facilitate the installation of the pin shaft 7, the second connecting sleeve 202 is a sleeve structure with both ends open, and the second oil seal 8 is arranged at the opening position of one end of the second connecting sleeve 202 close to the suspension support member 3, and the second oil seal 8 is used to seal the gap at one open end of the second connecting sleeve 202, and the opening of the end of the second connecting sleeve 202 away from the suspension support member 3 is provided with a sealing positioning structure, and the sealing positioning structure is used to seal the open end of the other side of the second connecting sleeve 202.

[0052] In order to improve the sealing performance, the first oil seal 5 and the second oil seal 8 are double-lip oil seals. The double-lip oil seal has two lips, sealing and dustproof. The dustproof lip is used to prevent dust and impurities from entering the cavity, and the sealing lip is used to prevent lubricating oil from leaking.

[0053] In order to facilitate the rotational connection between the pin shaft 7 and the first connecting sleeve 201, the inner cavity of the first connecting sleeve 201 is provided with a first bearing 4, the inner ring of the first bearing 4 is sleeved on the pin shaft 7, the outer ring is matched with the inner cavity of the first connecting sleeve 201, and the first connecting sleeve 201 is rotationally connected with the pin shaft 7 through the first bearing 4. In order to facilitate the rotational connection between the pin shaft 7 and the second connecting sleeve 202, the inner cavity of the second connecting sleeve 202 is provided with a second bearing 9, the inner ring of the second bearing 9 is sleeved on the pin shaft 7, the outer ring is matched with the inner cavity of the second connecting sleeve 202, and the second connecting sleeve 202 is rotationally connected with the pin shaft 7 through the second bearing 9. The first bearing 4 supports one end of the pin shaft 7, the second bearing 9 supports the other end of the pin shaft 7, and the suspension support member 3 is penetrated on the pin shaft 7.

[0054] In one embodiment, the first bearing 4 and the second bearing 9 are both tapered roller bearings, and the first bearing 4 and the second bearing 9 are arranged back to back.

[0055] Further, the sealing positioning structure includes a blocking block 10 connected to the inner cavity of the second connecting sleeve 202, one end of the blocking block 10 contacts the outer ring of the second bearing 9 to limit the axial position of the second bearing 9, and the other end is connected to the sealing cover plate 11, the outer diameter of the sealing cover plate 11 is larger than the outer diameter of the blocking block 10, and the sealing cover plate 11 is placed in the placement groove at the end of the second connecting sleeve 202. Among them, the blocking block 10 is threadedly connected to the inner cavity of the second connecting sleeve 202 to limit the position of the second bearing 9, and the sealing cover plate 11 is connected to the blocking block 10 by connecting screws 12 to play a sealing role. It can be understood that a threaded hole for connecting the connecting screw 12 is provided on the end face of the blocking block 10 close to the sealing cover plate 11, and specifically, the threaded hole is provided at the center position of the end face of the blocking block 10. In order to facilitate the installation of the blocking block 10, a mounting groove for easy installation is provided on the end face of the blocking block 10 close to the sealing cover plate 11.

[0056] In order to facilitate the installation of the bearing, in one embodiment, as Figure 7 and Figure 8 As shown, the pin shaft 7 includes a first shaft section 701, a second shaft section 702, a third shaft section 703 and a fourth shaft section 704 which are sequentially connected and arranged. For ease of installation, the diameter of the second shaft section 702 is larger than the diameter of the first shaft section 701, the diameter of the third shaft section 703 is larger than the diameter of the second shaft section 702, and the diameter of the fourth shaft section 704 is smaller than the diameter of the third shaft section 703. The first shaft section 701 is arranged in the inner cavity of the first connecting sleeve 201, and the first shaft section 701 is used to install the first bearing 4. The second shaft section 702 is arranged between the first connecting sleeve 201 and the second connecting sleeve 202, and the second shaft section 702 is used to install the suspension support member 3. The third shaft section 703 and the fourth shaft section 704 are arranged in the inner cavity of the second connecting sleeve 202, and the third shaft section 703 is used to install the second oil seal 8, and the second oil seal 8 is sleeved on the third shaft section 703, and the fourth shaft section 704 is used to install the second bearing 9. Specifically, the first bearing 4 is connected to the first shaft segment 701 , and the second bearing 9 is connected to the fourth shaft segment 704 .

[0057] In order to facilitate the limiting, a ring seat 6 is fixedly sleeved on the first shaft section 701. The ring seat 6 is arranged between the first bearing 4 and the suspension support member 3. One side of the ring seat 6 contacts the first bearing 4 to limit the inner ring of the first bearing 4, and the other side contacts the suspension support member 3 to limit one end of the suspension support member 3. The outer ring of the first bearing 4 is limited by the limiting ring stage in the first connecting sleeve 201, and the other end of the suspension support member 3 is limited by the end face of the third shaft section 703. The first oil seal 5 is sleeved on the ring seat 6.

[0058] The swing arm 2 of the utility model is an integrated structure, the swing arm 2 is a V-shaped structure, the end portion of the swing arm 2 connected to the suspension support member 3 is the top position of the V-shaped structure, and the two ends of the opening position of the V-shaped structure are respectively connected to a ball joint 1, such as Figure 4 As shown. The swing arm 02 in the prior art is a split structure. Figure 1 The two separate swing arms 02 are arranged on both sides of the suspension support 03. The swing arm 2 of the utility model is an integrated structure. Figure 4 As shown, the swing arm 2 has better rigidity than the swing arm with a split structure in the prior art, and the concentricity of the two ends of the swing arm 2 for connecting with the ball joint 1 is higher.

[0059] The suspension swing arm connection structure of the utility model adopts a double-lip oil seal for the oil seal, so that the internal grease does not flow out and the external dust is not easy to enter; the oil seal is sealed in the connecting sleeve of the swing arm 2 and does not directly contact with foreign objects. Foreign objects stirred up by the vehicle will not contaminate the oil seal, and the risk of failure of the oil seal is small; the swing arm 2 is an integrated structure with high rigidity.

[0060] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this solution.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this solution, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A suspension swing arm connection structure, comprising a swing arm, a ball joint and a suspension support, wherein one end of the swing arm is connected to a vehicle frame through the ball joint, and the other end is connected to a wheel through the suspension support, characterized in that: The end of the swing arm connected to the suspension support member includes a first connecting sleeve and a second connecting sleeve arranged at intervals, the suspension support member is arranged between the first connecting sleeve and the second connecting sleeve, the first connecting sleeve, the suspension support member and the second connecting sleeve are connected by a pin shaft; the end of the first connecting sleeve close to the suspension support member is provided with a first oil seal, and the end of the second connecting sleeve close to the suspension support member is provided with a second oil seal; the first connecting sleeve and the second connecting sleeve are rotatably connected to the pin shaft.

2. The suspension swing arm connection structure according to claim 1, characterized in that: The first connecting sleeve is a sleeve structure with one end sealed and the other end open, the open end of the first connecting sleeve is arranged close to the suspension support member, and the first oil seal is arranged at the open end of the first connecting sleeve; The second connecting sleeve is a sleeve structure with openings at both ends. The second oil seal is arranged at the opening of one end of the second connecting sleeve close to the suspension support member, and a sealing positioning structure is arranged at the opening of one end of the second connecting sleeve away from the suspension support member.

3. The suspension swing arm connection structure according to claim 2, characterized in that: The inner cavity of the first connecting sleeve is provided with a first bearing, and the first connecting sleeve is rotatably connected to the pin shaft through the first bearing; the inner cavity of the second connecting sleeve is provided with a second bearing, and the second connecting sleeve is rotatably connected to the pin shaft through the second bearing.

4. The suspension swing arm connection structure according to claim 3, characterized in that: The sealing and positioning structure comprises a sealing block connected to the inner cavity of the second connecting sleeve, one end of the sealing block contacts the second bearing, and the other end is connected to the sealing cover plate.

5. The suspension swing arm connection structure according to claim 4, characterized in that: The blocking block is threadedly connected to the inner cavity of the second connecting sleeve, the sealing cover plate is connected to the blocking block via connecting screws, and the diameter of the sealing cover plate is greater than the diameter of the blocking block.

6. The suspension swing arm connection structure according to claim 3, characterized in that: The first bearing and the second bearing are both tapered roller bearings, and the first bearing and the second bearing are arranged back to back.

7. The suspension swing arm connection structure according to claim 3, characterized in that: The pin shaft comprises a first shaft segment, a second shaft segment, a third shaft segment and a fourth shaft segment which are sequentially connected and arranged, the diameter of the second shaft segment is larger than the diameter of the first shaft segment, the diameter of the third shaft segment is larger than the diameter of the second shaft segment, and the diameter of the fourth shaft segment is smaller than the diameter of the third shaft segment; The first shaft segment is arranged in the inner cavity of the first connecting sleeve, the second shaft segment is arranged between the first connecting sleeve and the second connecting sleeve, and the third shaft segment and the fourth shaft segment are arranged in the inner cavity of the second connecting sleeve.

8. The suspension swing arm connection structure according to claim 7, characterized in that: The first bearing is connected to the first shaft section, the second bearing is connected to the fourth shaft section, and the second oil seal sleeve is arranged on the third shaft section.

9. The suspension swing arm connection structure according to claim 8, characterized in that: A ring seat is provided on the fixed sleeve of the first shaft section, and the ring seat is arranged between the first bearing and the suspension support member, one side of the ring seat contacts the first bearing, and the other side of the ring seat contacts the suspension support member; The outer side surface of the ring seat is sleeved with a first oil seal.

10. The suspension swing arm connection structure according to claim 1, characterized in that: The swing arm is a V-shaped structure, the end of the swing arm connected to the suspension support is the top position of the V-shaped structure, and the two ends of the opening position of the V-shaped structure are respectively connected to a ball joint; The first oil seal and the second oil seal are both double-lip oil seals.

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