Plate spring pin shaft assembly, suspension system and vehicle

Abstract

The invention provides a plate spring pin shaft assembly, a suspension system and a vehicle, relates to the technical field of vehicles, and aims to reduce or avoid the risk that a pin shaft is separated from a bracket or a plate spring. The plate spring pin shaft assembly comprises a support and a plate spring assembly. The support comprises a first plate body and a second plate body, and the first plate body and the second plate body are provided with a through hole and a blind hole respectively. The plate spring assembly comprises a plate spring, a pin shaft and a limiting piece. The plate spring is provided with a spring eye, and the spring eye is located between the first plate body and the second plate body. The pin shaft is arranged among the through hole, the spring eye and the blind hole in a penetrating mode. The limiting piece is installed on the first plate body and connected with the pin shaft.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a leaf spring pin assembly, a suspension system and a vehicle. Background Art

[0002] The leaf spring is an elastic element in the vehicle suspension system. The pin is inserted between the bracket and the leaf spring to realize the hinge connection between the leaf spring and the bracket. Usually, a thread is set at the end of the pin, and the locking bolt cooperates with the thread to restrict the movement of the pin along its own axis. However, there is still a risk that the pin will fall out of the bracket or the leaf spring, and the pin needs to be lubricated regularly. Summary of the invention

[0003] The present application provides a leaf spring pin assembly, a suspension system and a vehicle, which are used to reduce or avoid the risk of the pin coming out of a bracket or a leaf spring without the need to regularly replenish lubricating oil.

[0004] In a first aspect, the present application provides a leaf spring pin assembly, comprising a bracket and a leaf spring assembly;

[0005] The bracket comprises a first plate body and a second plate body, wherein the first plate body and the second plate body respectively have a through hole and a blind hole;

[0006] The leaf spring assembly includes a leaf spring, a pin shaft and a limiter;

[0007] The leaf spring has a coiled ear, and the coiled ear is located between the first plate body and the second plate body;

[0008] The pin shaft is arranged between the through hole, the coiled ear and the blind hole, and a closed oil storage space is provided between the portion where the pin shaft is arranged to pass through the coiled ear and the coiled ear;

[0009] The limiting member is installed on the first plate body and is connected to the pin shaft. The limiting member is connected to the pin shaft.

[0010] In a possible implementation, the limiting member includes a pressure cover portion, the pressure cover portion has a groove, and the pin shaft abuts against the bottom of the groove.

[0011] In a possible implementation, the limiting member further includes a connecting portion, the connecting portion has a connecting hole, the first plate body has a threaded hole, and a threaded connector is provided between the connecting hole and the threaded hole.

[0012] In a possible implementation, both the through hole and the blind hole have bushings, and the pin is rotatably connected to both bushings.

[0013] In a possible implementation, the pin includes a main shaft portion and two annular protrusions arranged on the main shaft portion, and the two bushings are respectively sleeved on the two annular protrusions.

[0014] In a possible implementation, the main shaft portion has an oil storage section, the oil storage section is located between the two annular protrusions, an oil storage space is formed between the oil storage section and the coiled ears, and lubricating oil is contained in the oil storage space.

[0015] In a possible implementation, the oil storage section has at least one bearing surface, and the bearing surface is used to drive the lubricating oil to be smeared on the inner wall of the rolled ear.

[0016] In a possible implementation, the oil storage section has a plurality of the bearing surfaces, and the bearing surfaces are arranged at equal intervals along the circumference of the pin shaft.

[0017] In a second aspect, the present application provides a suspension system, comprising a vehicle frame and the leaf spring pin assembly of any one of the above items, wherein the bracket in the leaf spring pin assembly is connected to the vehicle frame.

[0018] In a third aspect, the present application provides a vehicle comprising the above-mentioned suspension system.

[0019] The leaf spring pin assembly, suspension system and vehicle provided by the present application have the following beneficial effects:

[0020] The leaf spring pin assembly provided by the present application includes a bracket and a leaf spring assembly, and the leaf spring assembly includes a leaf spring, a pin and a stopper. The bracket includes a first plate body and a second plate body, and the first plate body and the second plate body have a through hole and a blind hole respectively, and the ear of the leaf spring is located between the first plate body and the second plate body, so that the pin can be inserted between the first plate body, the ear and the second plate body, and the bracket and the leaf spring can be hinged through the pin.

[0021] The pin is inserted between the through hole, the rolled ear and the blind hole, so that one end of the pin located in the blind hole is limited by the bottom of the blind hole to prevent the pin from coming out of the second plate body. The limiting member is installed on the first plate body and the limiting member is connected to the pin, so that the limiting member can limit the pin from coming out of the through hole in the first plate body.

[0022] Compared with the related art in which the pin is constrained by a locking bolt, the leaf spring pin assembly and vehicle provided in the present application limit the pin from coming out of the second plate by passing the pin through a blind hole in the second plate, and the pin is connected to the pin through a limit member, and the limit member is installed on the side of the first plate facing away from the second plate, so that the limit member limits the pin from coming out of the first plate, thereby reducing or avoiding the risk of the pin coming out of the bracket or the leaf spring.

[0023] In addition, since there is a closed oil storage space between the part where the pin shaft passes through the coiled ear and the coiled ear, the closed oil storage space can store lubricating oil for a long time without the need for regular lubricating oil replenishment and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a leaf spring pin assembly provided in an embodiment of the present application;

[0026] Figure 2 A schematic cross-sectional structure diagram of a leaf spring pin assembly provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of a pin shaft provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 10- Bracket;

[0030] 11-first plate body; 111-through hole; 112-threaded hole; 12-second plate body;

[0031] 121-blind hole;

[0032] 13-connecting plate body;

[0033] 20-leaf spring assembly;

[0034] 21-leaf spring; 211-wrap ear; 22-pin shaft; 221-main shaft portion; 222-annular protrusion;

[0035] 223- oil storage section; 224- oil storage space; 225- bearing surface; 23- limiting member;

[0036] 231 - gland portion; 232 - connection portion; 233 - threaded connection piece.

[0037] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0039] In the related art, the pin shaft has the risk of coming out of the bracket or leaf spring. The reason for this problem is that in the vehicle's suspension system, the pin shaft needs to bear the load of the bracket or the ground, and the bracket and the leaf spring can move relative to each other, making the pin shaft easy to move along its own axis. In the related art, the pin shaft is constrained by a locking bolt. When the pin shaft moves along its own axis, the pin shaft impacts the locking bolt, which is easy to loosen the locking bolt, making the pin shaft at risk of coming out of the bracket or leaf spring. In addition, in order to ensure the smooth rotation of the pin shaft, lubricating oil needs to be applied to the pin shaft, but the lubricating oil is easy to lose as the pin shaft is used.

[0040] In view of the above technical problems, the embodiments of the present application provide a leaf spring pin assembly, a suspension system and a vehicle, wherein the pin is inserted into a blind hole of the second plate body to limit the pin from coming out of the second plate body, and the limiter is connected to the pin and the limiter is installed on the first plate body, so that the limiter limits the pin from coming out of the first plate body, thereby reducing or avoiding the risk of the pin coming out of the bracket or the leaf spring. A closed oil storage space is formed between the part where the pin is inserted into the coil ear and the coil ear, and the closed oil storage space can store lubricating oil for a long time without the need for regular lubricating oil replenishment and maintenance.

[0041] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0042] refer to Figure 1 and Figure 2 The leaf spring pin assembly provided in the embodiment of the present application includes a bracket 10 and a leaf spring assembly 20. The bracket 10 is connected to the vehicle frame, and the leaf spring assembly 20 is rotatably connected to the bracket 10.

[0043] refer to Figure 1 The bracket 10 includes a first plate body 11 and a second plate body 12. For example, referring to Figure 1The first plate body 11 and the second plate body 12 are arranged opposite to each other, and the first plate body 11 and the second plate body 12 are connected by a connecting plate body 13. The first plate body 11, the connecting plate body 13 and the second plate body 12 can be connected by welding, threaded connection, etc. In addition, the first plate body 11, the connecting plate body 13 and the second plate body 12 can also be integrally formed.

[0044] refer to Figure 1 The first plate body 11 has a through hole 111, which penetrates the first plate body 11. The second plate body 12 has a blind hole 121, which is formed on a side of the second plate body 12 close to the first plate body 11. The through hole 111 and the blind hole 121 are coaxially arranged.

[0045] refer to Figure 1 and Figure 2 The leaf spring assembly 20 includes a leaf spring 21, a pin 22 and a stopper 23. The leaf spring 21 has a coil ear 211, which is formed at the end of the leaf spring 21. The coil ear 211 has a connecting hole, and the coil ear 211 is located between the first plate body 11 and the second plate body 12, so that the connecting hole can be coaxially arranged with the through hole 111 and the blind hole 121.

[0046] refer to Figure 1 and Figure 2 The pin 22 is a hinged member connecting the bracket 10 and the leaf spring 21. The pin 22 is inserted into the through hole 111 of the first plate body 11, the connection hole of the ear 211, and the blind hole 121 of the second plate body 12. Thus, the bracket 10 and the leaf spring 21 are connected by the pin 22, and the leaf spring 21 and the bracket 10 can both rotate on the pin 22 to realize the hinge connection between the bracket 10 and the leaf spring 21.

[0047] Since the pin shaft 22 is inserted into the blind hole 121 of the second plate body 12 , the bottom of the blind hole 121 constrains the pin shaft 22 to prevent the pin shaft 22 from escaping from the second plate body 12 .

[0048] refer to Figure 2 A closed oil storage space 224 is provided between the portion of the pin 22 that passes through the coiled ear 221 and the coiled ear 221. The closed oil storage space 224 can store lubricating oil for a long time without the need for regular lubricating oil replenishment and maintenance.

[0049] refer to Figure 1 and Figure 2The limit member 23 is used to restrain the pin 22 from coming out of the first plate body 11. The limit member 23 is installed on the first plate body 11. For example, the limit member 23 is threadedly connected or welded to the side of the first plate body 11 facing away from the second plate body 12. The limit member 23 is connected to the pin 22. For example, the limit member 23 is crimped on the end of the pin 22. Since the limit member 23 is connected to the pin 22 and is installed on the first plate body 11, the pin 22 is restrained by the limit member 23 to prevent the pin 22 from coming out of the first plate body 11. Since the pin 22 is restrained from coming out of the first plate body 11 and the pin 22 is restrained from coming out of the second plate body 12, it is difficult for the pin 22 to move along its own axial direction, thereby reducing or avoiding the risk of the pin 22 coming out of the bracket 10 or the leaf spring 21.

[0050] The leaf spring pin shaft assembly provided by the present application is configured to limit the pin shaft 22 from coming out of the second plate body 12 by inserting the pin shaft 22 into the blind hole 121 of the second plate body 12, and the pin shaft 22 is connected to the pin shaft 22 by the stopper 23 and the stopper 23 is installed on the first plate body 11, so that the stopper 23 limits the pin shaft 22 from coming out of the first plate body 11, thereby reducing or avoiding the risk of the pin shaft 22 coming out of the bracket 10 or the leaf spring 21. Compared with constraining the pin shaft by a locking bolt, the leaf spring pin shaft assembly provided by the present application constrains the pin shaft more stably, thereby reducing or avoiding the risk of the pin shaft coming out of the bracket or the leaf spring.

[0051] In some embodiments, reference Figure 1 The limit member 23 includes a pressure cover portion 231, which can be buckled on the pin 22, thereby constraining the pin 22 and preventing the pin 22 from falling out of the first plate body 11. The pressure cover portion 23 has a groove, for example, the groove is formed on the side of the pressure cover portion 23 close to the pin 22, and the end of the pin 22 is located in the groove and abuts against the bottom of the groove. By buckling the pressure cover portion 231 on the pin 22, even if the pin 22 impacts the limit member 23 due to its own movement, the constraint strength of the limit member 23 is higher than the constraint of the fastening bolt, thereby further reducing or lowering the risk of the pin 22 falling out.

[0052] In some embodiments, reference Figure 1 The stopper 23 also includes a connecting portion 232, which is used to connect the first plate body 11. The connecting portion 232 can be located on the side of the first plate body 11 facing away from the second plate body 12. The connecting portion 232 has a connecting hole, and the first plate body 11 has a threaded hole 112. The threaded hole 112 is coaxially arranged with the connecting hole. A threaded connector 233 is inserted between the connecting hole 223 and the threaded hole 112. The threaded connector 233 can be a screw. In this embodiment, the stopper 23 and the first plate body 11 are connected by the threaded connector 233, which is convenient for disassembly and assembly and provides good connection strength.

[0053] In some embodiments, bushings are provided in both the through hole 111 and the blind hole 121, and the bushings may be metal bushings, such as steel bushings. The pin 22 is rotatably connected to both bushings, and the bushings protect the pin 22 and the bracket 10, thereby reducing the wear of the pin 22 and the bracket 10. It should be noted that lubricating oil is applied to the bushing, and the lubricating oil may be butter or other lubricating oil, which further reduces the wear of the pin 22 and the bracket 10, thereby increasing the service life of the leaf spring pin assembly.

[0054] Based on the above embodiments, Figure 3 The pin 22 includes a main shaft portion 221 and two annular protrusions 222 disposed on the main shaft portion 221. The shape of the annular protrusions 222 matches the inner groove of the bushing. The two bushings are respectively sleeved on the two annular protrusions 222. The annular protrusions 222 are the parts of the pin 22 that are rotatably connected to the bracket 10. There is lubricating oil between the annular protrusions 222 and the bushing to facilitate the rotation of the bracket 10 on the pin 22.

[0055] In some embodiments, reference Figure 3 The main shaft portion 221 has an oil storage section 223, and the oil storage section 223 is located between the two annular protrusions 222. Since the annular protrusion 222 is a protrusion provided on the main shaft portion 221, the radial length of the annular protrusion 222 is greater than the radial length of the oil storage section 223. When the pin 22 is inserted into the ear 211, Figure 2 An oil storage space 224 is formed between the oil storage section 223 and the ear 211, and lubricating oil is contained in the oil storage space 224. Since the two bushings are sleeved on the two annular protrusions 222, the oil storage space 224 is closed. It is only necessary to fill the pin 22 with lubricating oil during assembly so that the oil storage space 224 contains lubricating oil. The oil storage space 224 is closed, and there is no need to regularly replenish the lubricating oil.

[0056] In some embodiments, reference Figure 3 The oil storage section 223 has at least one bearing surface 225, which can be a plane arranged on the outer periphery of the oil storage section 223. The bearing surface 225 is used to drive the lubricating oil to be smeared on the inner wall of the coiled ear 211. When the pin shaft 22 rotates along its own axial direction, the bearing surface 225 also rotates along the axial direction of the pin shaft 22, thereby driving the lubricating oil on the bearing surface 225 to rotate, so that the lubricating oil is smeared on the coiled ear 211, so as to achieve self-lubrication through the rotation of the pin shaft 22.

[0057] In some embodiments, reference Figure 3The oil storage section 223 has a plurality of bearing surfaces 225, and the number of the bearing surfaces 225 can be three, four or more. The bearing surfaces 225 are arranged at equal intervals along the circumference of the pin 22, so that when the bearing surfaces 225 drive the lubricating oil to rotate, the lubricating oil can be evenly applied to the rolled ears 211, further increasing the smoothness of the rotation of the rolled ears 211 and the pin 22.

[0058] The present application also provides a suspension system, which includes the leaf spring pin assembly in any of the above embodiments, wherein the bracket in the leaf spring pin assembly is connected to the frame, for example, the bracket can be pre-installed on the frame, or the bracket is a part of the frame.

[0059] The specific structure and connection method of the leaf spring pin assembly can refer to any of the above embodiments. Since the vehicle provided by the present application includes the leaf spring pin assembly in any of the above embodiments, it has at least the beneficial effects of any of the above embodiments, which will not be described one by one here.

[0060] The present application also provides a vehicle, which may be a small car, a passenger car, a truck or a heavy machine. The heavy machine may be an excavator, a transporter or a crane. The vehicle includes a suspension system, which includes a leaf spring pin assembly in any of the above embodiments, wherein the specific structure and connection method of the leaf spring pin assembly can refer to any of the above embodiments. Since the vehicle provided by the present application includes the leaf spring pin assembly in any of the above embodiments, it has at least the beneficial effects in any of the above embodiments, which will not be described one by one here.

[0061] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0062] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0063] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0064] 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 technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0065] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0067] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leaf spring pin assembly, characterized in that: It comprises a bracket (10) and a leaf spring assembly (20); The bracket (10) comprises a first plate body (11) and a second plate body (12), wherein the first plate body (11) and the second plate body (12) respectively have a through hole (111) and a blind hole (121); The leaf spring assembly (20) comprises a leaf spring (21), a pin shaft (22) and a stopper (23); The leaf spring (21) has a coiled ear (211), and the coiled ear (211) is located between the first plate body (11) and the second plate body (12); The pin shaft (22) is inserted between the through hole (111), the coiled ear (211) and the blind hole (121), and a closed oil storage space (224) is provided between the portion of the pin shaft (22) inserted through the coiled ear (211) and the coiled ear (211); The limiting member (23) is mounted on the first plate body (11) and the limiting member (23) is connected to the pin shaft (22).

2. The leaf spring pin assembly according to claim 1, characterized in that: The limiting member (23) comprises a pressing cover portion (231), the pressing cover portion (231) having a groove, and the pin shaft (22) abuts against the bottom of the groove.

3. The leaf spring pin assembly according to claim 2, characterized in that: The limiting member (23) further comprises a connecting portion (232), the connecting portion (232) having a connecting hole, the first plate body (11) having a threaded hole (112), and a threaded connecting member (233) is provided between the connecting hole and the threaded hole (112).

4. The leaf spring pin assembly according to any one of claims 1 to 3, characterized in that: The through hole (111) and the blind hole (121) both have bushings in them, and the pin shaft (22) is rotatably connected to both bushings.

5. The leaf spring pin assembly according to claim 4, characterized in that: The pin shaft (22) comprises a main shaft portion (221) and two annular protrusions (222) arranged on the main shaft portion (221), and the two bushings are respectively sleeved on the two annular protrusions (222).

6. The leaf spring pin assembly according to claim 5, characterized in that: The main shaft portion (221) has an oil storage section (223), the oil storage section (223) is located between the two annular protrusions (222), and the oil storage space (224) is formed between the oil storage section (223) and the rolled ear (211), and the oil storage space (224) contains lubricating oil.

7. The leaf spring pin assembly according to claim 6, characterized in that: The oil storage section (223) has at least one bearing surface (225), and the bearing surface (225) is used to drive the lubricating oil to be smeared on the inner wall of the rolled ear (211).

8. The leaf spring pin assembly according to claim 7, characterized in that: The oil storage section (223) has a plurality of bearing surfaces (225), and the bearing surfaces (225) are arranged at equal intervals along the circumference of the pin shaft (22).

9. A suspension system, characterized in that: It comprises a vehicle frame and a leaf spring pin shaft assembly as claimed in any one of claims 1 to 8, wherein the bracket (10) in the leaf spring pin shaft assembly is connected to the vehicle frame.

10. A vehicle, characterized in that: Comprising the suspension system of claim 9.

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