A leaf spring mounting structure for a vehicle suspension and an automobile

Abstract

This invention discloses a leaf spring mounting structure for a vehicle suspension and an automobile, relating to the field of automotive suspension technology. It includes: a leaf spring bracket with an oil injection hole at its bottom; a leaf spring pin passing through the leaf spring bracket, with a first oil delivery unit inside the leaf spring pin communicating with a clearance space; a limiting locking part passing through the leaf spring bracket and engaging with the leaf spring pin, the limiting locking part having a second oil delivery unit, the two ends of the first oil delivery unit communicating with the oil injection hole and the second oil delivery unit respectively; and a grease nipple located at the bottom of the leaf spring bracket, connecting to the oil injection hole. In this application, the grease nipple is located at the bottom of the leaf spring bracket, and oil delivery units are provided on both the leaf spring pin and the limiting locking part. The limiting locking part in this application not only engages with the leaf spring pin to prevent loosening, but also provides a channel for grease delivery, ensuring sufficient lubrication between the leaf spring pin and the leaf spring bushing, thus extending the service life of the leaf spring bracket, leaf spring pin, and leaf spring bushing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile suspension, in particular to a leaf spring mounting structure of a vehicle suspension and an automobile. BACKGROUND

[0002] In a commercial vehicle, the front and rear suspension leaf springs are generally connected to the leaf spring support on the frame by a leaf spring pin. Therefore, the assembly of the leaf spring pin is very important. The leaf spring pin not only needs to bear the load from the frame or the impact from the ground, but also needs to be locked to prevent axial movement due to the relative movement between the leaf spring and the leaf spring support. In addition, the leaf spring pin and the leaf spring bushing are usually in clearance fit and relative sliding. Therefore, the lubrication between the leaf spring pin and the bushing on the leaf spring support must be smooth.

[0003] In the related art, the lubricating grease is added between the leaf spring pin and the leaf spring bushing for lubrication. The leaf spring pin is positioned and installed by a positioning bolt installed on the leaf spring support or a lifting lug and locked by passing through an arc slot on the leaf spring pin. The grease nipple for lubricating the leaf spring pin and the leaf spring bushing is usually installed at the end of the leaf spring pin and the axes of the two coincide. The lubricating oil is injected between the leaf spring pin and the leaf spring bushing through the oil hole at the end of the leaf spring pin. However, due to the limited design space, the grease nipple arranged at the end of the leaf spring pin is prone to interfere with other system parts (such as the steering rod system parts, the radiator, etc.), or the lubricating grease is not convenient to add (the adding device must be connected to the grease nipple). SUMMARY

[0004] In view of the problem that the leaf spring mounting structure of the vehicle suspension in the prior art is limited by the limited design space, which leads to difficult arrangement of the grease nipple and insufficient lubricating grease injection space, the present application provides a leaf spring mounting structure of a vehicle suspension, which comprises a leaf spring support, a leaf spring pin, a limiting and locking part, and a grease nipple, wherein

[0005] The leaf spring support is provided with an oil injection hole at the bottom. The leaf spring pin is arranged in the leaf spring support. The leaf spring pin and the leaf spring bushing are in clearance fit to form a clearance space. The leaf spring pin is provided with a first oil delivery unit, and the first oil delivery unit is in communication with the clearance space. The limiting and locking part is arranged in the leaf spring support and is in limiting fit with the leaf spring pin. The limiting and locking part is provided with a second oil delivery unit, and the first oil delivery unit is in communication with the oil injection hole and the second oil delivery unit at both ends. The grease nipple is arranged at the bottom of the leaf spring support, and the grease nipple is connected to the oil injection hole.

[0006] In some embodiments, the first oil delivery unit comprises:

[0007] A positioning portion is arranged on the leaf spring pin, and the positioning portion is limitedly matched with the limiting and locking portion, and a first oil hole is arranged on the positioning portion, and the first oil hole is communicated with the second oil supply unit;

[0008] A second oil hole is arranged in the middle part of the leaf spring pin;

[0009] An oil supply channel is arranged in the leaf spring pin, and the oil supply channel is arranged along the axial direction of the leaf spring pin, and the oil supply channel is communicated with the first oil hole and the second oil hole.

[0010] In some embodiments, the positioning portion further comprises:

[0011] An inner concave positioning surface is arranged, and a first drainage groove is arranged on the positioning surface, and the second oil hole is arranged at the bottom of the first drainage groove.

[0012] In some embodiments, an annular oil groove is arranged in the middle part of the leaf spring pin, and the first oil hole is arranged at the bottom of the annular oil groove.

[0013] In some embodiments, a C-shaped oil groove is arranged in the middle part of the leaf spring pin, and the C-shaped oil groove is arranged along the length direction of the leaf spring pin, and the first oil hole is arranged at the bottom of the C-shaped oil groove, and the C-shaped oil groove comprises a bottom surface and two end surfaces, the bottom surface is a plane, and the two end surfaces are in the shape of a circular arc.

[0014] In some embodiments, a thread is arranged at the end of the oil supply channel, a plug is arranged at the end of the leaf spring pin, and the plug is connected to the end of the oil supply channel through the thread to block one end of the oil supply channel.

[0015] In some embodiments, the limiting and locking portion comprises a wedge-shaped pin, and opposite sides of the wedge-shaped pin are a wedge-shaped surface and an abutting surface, and the wedge-shaped surface is arranged in close contact with the leaf spring pin.

[0016] In some embodiments, the second oil supply unit comprises:

[0017] A second drainage groove is arranged on the abutting surface, a through hole is arranged at the bottom of the second drainage groove, and the other end of the through hole is arranged on the wedge-shaped surface and communicated with the first oil supply unit.

[0018] In some embodiments, the limiting and locking portion further comprises a locking nut, and the locking nut is arranged at the end of the wedge-shaped pin, and the locking nut is used for locking the wedge-shaped pin.

[0019] In another aspect, the application provides an automobile, which comprises the leaf spring mounting structure according to any one of the above.

[0020] It needs to be explained that the applicant finds that the main reason for the difficulty of arranging the oil nozzle is that other system parts (such as the steering pull rod system parts, the radiator, etc.) are arranged on the horizontal space of the automobile. The oil nozzle arranged on the leaf spring pin in the conventional horizontal arrangement is easy to interfere with other parts, whether the oil nozzle is close to the outer side of the vehicle frame or close to the inner side of the vehicle frame. In the application, the oil nozzle is arranged at the bottom of the leaf spring support, and the oil conveying unit is arranged on the leaf spring pin and the limiting and locking part. The limiting and locking part not only limits the cooperation with the leaf spring pin to avoid the loosening of the leaf spring pin, but also provides a channel for the conveying of the grease to ensure the sufficient lubrication between the leaf spring pin and the leaf spring bushing, thereby prolonging the service life of the leaf spring support, the leaf spring pin and the leaf spring bushing. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is an exploded view of the leaf spring mounting structure in the embodiment of the present application.

[0023] Figure 2 It is a schematic view of the leaf spring mounting structure in the embodiment of the present application.

[0024] Figure 3 It is a sectional view of the leaf spring mounting structure in the embodiment of the present application.

[0025] Figure 4 It is a structural schematic view of the leaf spring support in the embodiment of the present application.

[0026] Figure 5 It is a structural schematic view of the limiting and locking part butt joint surface side in the embodiment of the present application.

[0027] Figure 6 It is a structural schematic view of the limiting and locking part wedge surface side in the embodiment of the present application.

[0028] Figure 7 It is a structural schematic view of the leaf spring pin in the first embodiment of the present application.

[0029] Figure 8 It is a structural schematic view of the leaf spring pin in the second embodiment of the present application.

[0030] Figure 9 It is a schematic view of the leaf spring pin in the second embodiment of the present application.

[0031] In the diagram: 1. Leaf spring bracket; 12. Oil injection hole; 2. Leaf spring pin; 21. First oil delivery unit; 212. First oil hole; 213. Second oil hole; 214. Oil delivery channel; 215. Positioning part; 216. First drainage groove; 217. Positioning surface; 22. Annular oil groove; 23. C-shaped oil groove; 231. Bottom surface; 232. End face; 3. Limiting and locking part; 31. Second oil delivery unit; 311. Second drainage groove; 312. Through hole; 32. Wedge-shaped surface; 33. Butt joint surface; 34. Locking nut; 4. Grease nozzle; 5. Leaf spring; 51. Leaf spring bushing; 6. Plug. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. In the prior art, the leaf spring mounting structure of vehicle suspension is limited by the confined design space, resulting in difficulties in grease nipple placement and insufficient space for grease filling. For example... Figure 1 and Figure 2 As shown, this application provides a leaf spring mounting structure for a vehicle suspension, which includes: a leaf spring bracket 1, a leaf spring pin 2, a limiting locking part 3, and a grease nipple 4; wherein,

[0034] The leaf spring bracket 1 has an oil injection hole 12 at its bottom;

[0035] The leaf spring pin 2 is inserted into the leaf spring bracket 1. The leaf spring pin 2 and the leaf spring bushing 51 of the leaf spring 5 are clearance-fitted to form a gap space. The leaf spring pin 2 is provided with a first oil delivery unit 21, which is connected to the gap space.

[0036] A limiting locking part 3 is inserted into the leaf spring bracket 1 and is limited and engaged with the leaf spring pin 2. The limiting locking part 3 is provided with a second oil supply unit 31. The two ends of the first oil supply unit 21 are respectively connected to the oil injection hole 12 and the second oil supply unit 31. A grease nipple 4 is provided at the bottom of the leaf spring bracket 1 and is connected to the oil injection hole 12.

[0037] It is understandable that in common automotive suspension systems, the leaf spring pin 2 and leaf spring bushing 51 are clearance-fitted and slide relative to each other. Lubrication between the leaf spring pin 2 and leaf spring bushing 51 is achieved by adding grease. In this application, the grease nipple 4 is located at the bottom of the leaf spring bracket 1, and grease delivery units are provided on both the leaf spring pin 2 and the limiting locking part 3. The limiting locking part of this application not only limits the leaf spring pin to prevent it from loosening, but also provides a channel for grease delivery, ensuring sufficient lubrication between the leaf spring pin and leaf spring bushing, thus extending the service life of the leaf spring bracket.

[0038] Preferably, in order to improve oil delivery efficiency, the mounting hole of the grease nozzle 4 is set perpendicular to the axis of the leaf spring pin 2.

[0039] In some specific embodiments, the first oil delivery unit 21 includes: a positioning part 215, a second oil hole 213, and an oil delivery channel 214; wherein,

[0040] A positioning part 215 is disposed on the leaf spring pin 2, and the positioning part 215 is in a limiting and locking engagement with the limiting and locking part 3. The positioning part 215 is provided with a first oil hole 212, which communicates with the second oil supply unit 31. A second oil hole 213 is disposed in the middle of the leaf spring pin 2. An oil supply channel 214 is disposed in the leaf spring pin 2, and the oil supply channel 214 is arranged along the axial direction of the leaf spring pin 2. The oil supply channel 214 communicates with both the first oil hole 212 and the second oil hole 213.

[0041] In some specific embodiments, the oil delivery channel 214 is axially arranged along the leaf spring pin 2 and has an opening at its end. The opening is threaded and threadedly connected to a plug 6. Because the oil delivery channel 214 has a thread at its end, and the leaf spring pin 2 has a plug 6 at its end, the plug 6 is threadedly connected to the end of the oil delivery channel 214 to seal one end of the oil delivery channel 214.

[0042] Understandably, the plug 6 is used to prevent grease from overflowing and to facilitate the removal of the leaf spring pin 2. Preferably, the length of the oil channel 214 is greater than the distance between the second oil hole 213 and the end face of the leaf spring pin 2.

[0043] In the first specific embodiment, such as Figure 7 As shown, the leaf spring pin 2 has an annular oil groove 22 in the middle, and the bottom of the annular oil groove 22 has the first oil hole 212.

[0044] In the second specific embodiment, a C-shaped oil groove 23 is formed in the middle of the leaf spring pin 2. The C-shaped oil groove 23 is arranged along the length direction of the leaf spring pin 2. The bottom of the C-shaped oil groove 23 is provided with the first oil hole 212. The C-shaped oil groove 23 includes a bottom surface 231 and two end surfaces 232. The bottom surface 231 is a plane, and the two end surfaces 232 are both arc-shaped. It can be understood that the above-mentioned C-shaped oil groove 23 structure can reduce stress concentration.

[0045] In some preferred embodiments, such as Figure 5 and Figure 6 As shown, the limiting locking part 3 includes a wedge pin, with a wedge surface 32 and a mating surface 33 on opposite sides of the wedge pin, and the wedge surface 32 is fitted to the leaf spring pin 2.

[0046] Specifically, such as Figure 3 As shown, the second oil delivery unit 31 includes a second drainage groove 311 disposed on the mating surface 33. The bottom of the second drainage groove 311 has a through hole 312, the other end of which is disposed on the wedge-shaped surface 32 and communicates with the first oil delivery unit 21. Optionally, the limiting locking part 3 further includes a locking nut 34, which is disposed at the end of the wedge-shaped pin and is used to lock the wedge-shaped pin.

[0047] It is worth noting that the leaf spring 5 and the leaf spring bracket 1 are connected by the leaf spring pin 2. After the locking nut 34 is tightened, it can ensure that the wedge pin reliably locks the leaf spring pin 2. Since the wedge surface 32 has a small angle and a self-locking function, the wedge pin will not loosen, which can ensure that the leaf spring pin 2 is reliably positioned and installed.

[0048] Furthermore, the positioning part 215 also includes: a concave positioning surface 217, on which a first drainage groove 216 is provided, and a second oil hole 213 is provided at the bottom of the first drainage groove 216.

[0049] It should be noted that in actual assembly, the through hole 312 of the wedge pin cannot be guaranteed to be perfectly aligned with the oil injection hole 12 of the leaf spring bracket 1 and the first oil hole 212 of the leaf spring pin 2. This application addresses this by providing a first drainage groove 216 on the leaf spring pin 2 and a second drainage groove 311 on the wedge pin. This allows grease to be introduced into the oil injection hole 12 and the first oil hole 212, ensuring unobstructed grease filling channels. The plug 6 is connected to the oil supply channel 214 of the leaf spring pin 2 via threads, preventing grease overflow and facilitating the disassembly of the leaf spring pin 2.

[0050] When lubricating the leaf spring mounting structure, the grease enters the grease injection hole 12 at the bottom of the leaf spring bracket 1 through the grease nipple 4, and then enters the second drainage groove 311 of the limiting locking part 3. The grease then enters the second oil hole 213 in the first drainage groove 216 of the leaf spring pin 2 through the through hole 312 in the second drainage groove 311. The grease then enters the oil supply channel 214 through the second oil hole 213 and is transported to the first oil hole 212, flowing between the leaf spring pin 2 and the leaf spring bushing 51, providing lubrication.

[0051] In some alternative embodiments, the wedge pin has a wedge-shaped structure, and the leaf spring pin 2 has a groove on its surface near the threaded connection section that mates with the wedge pin. The wedge pin is equipped with an elastic washer and a nut as a fastening and anti-loosening device. The leaf spring pin 2 is locked by planar friction.

[0052] Furthermore, in order to achieve lightweighting of the parts, the leaf spring pin 2 is also provided with weight reduction holes.

[0053] In some optional embodiments, the grease nozzle 4 is provided with a lubricating component, which has a lubrication hole. It also includes a clamping block and an elastic retaining ring disposed in the lubrication hole. The clamping block cooperates with the lubrication hole and abuts against the elastic retaining ring. The grease nozzle 4 includes a hollow grease nozzle body. The first end of the grease nozzle body is used to connect to a grease supply pipe, and the second end of the grease nozzle body is used to connect to the lubrication hole. The clamping block is provided with a channel for the second end to pass through, and the channel is coaxially disposed with the lubrication hole. The second end is a conical structure, and the bottom of the conical structure is provided with an annular groove for cooperating with the elastic retaining ring. It is understandable that the diameter of the central hole of the elastic retaining ring is smaller than the diameter of the second end of the grease nipple body; the elastic retaining ring and the clamping block can be pre-installed on the part to be lubricated. When the grease nipple 4 needs to be installed, simply insert the second end of the grease nipple body into the lubrication hole through the channel on the clamping block to achieve the clamping of the elastic retaining ring with the annular groove; the elastic retaining ring is elastic, can deform, and can return to its original shape; when the lubrication hole is a round hole, the clamping block is a cylindrical structure that matches the round hole.

[0054] In the grease nozzle 4 provided in this embodiment of the invention, the second end of the grease nozzle body has a tapered structure, which allows the second end to be easily inserted into the elastic retaining ring, causing the elastic retaining ring to deform until it falls into the annular retaining groove. The elastic retaining ring then returns to its original shape, thereby securing the second end and connecting the grease nozzle body to the part to be lubricated. Since the operator only needs to insert the second end of the grease nozzle body into the through hole to secure the elastic retaining ring to the annular retaining groove, the installation of the grease nozzle 4 can be completed without the need for tightening the threads using tools. This greatly reduces the operator's labor intensity and effectively shortens the installation time. Furthermore, because the grease nozzle body eliminates the external thread structure, it will not be scrapped due to thread damage, thus greatly extending the service life of the grease nozzle.

[0055] On the other hand, this application provides an automobile, which includes: a leaf spring mounting structure, the leaf spring mounting structure comprising: a leaf spring bracket 1, a leaf spring pin 2, a limiting locking part 3, and a grease nipple 4; wherein,

[0056] A leaf spring bracket 1 has an oil injection hole 12 at its bottom. A leaf spring pin 2 passes through the leaf spring bracket 1 and is clearance-fitted with the leaf spring bushing 51. A first oil delivery unit 21 is provided inside the leaf spring pin 2. A limiting locking part 3 passes through the leaf spring bracket 1 and is limited to fit with the leaf spring pin 2. A second oil delivery unit 31 is provided in the limiting locking part 3 and communicates with the first oil delivery unit 21. A grease nipple 4 is located at the bottom of the leaf spring bracket 1 and is connected to the oil injection hole 12. The grease nipple 4 is used to input lubricating oil into the oil injection hole 12 so that the lubricating grease passes sequentially through the second oil delivery unit 31 and the first oil delivery unit 21 before entering between the leaf spring pin 2 and the leaf spring bushing 51 of the leaf spring 5.

[0057] It is understandable that in common automotive suspension systems, the leaf spring pin 2 and leaf spring bushing 51 are clearance-fitted and slide relative to each other. Lubrication between the leaf spring pin 2 and leaf spring bushing 51 is achieved by adding grease. In this application, the grease nipple 4 is located at the bottom of the leaf spring bracket 1, and grease delivery units are provided on both the leaf spring pin 2 and the limiting locking part 3. The limiting locking part of this application not only limits the leaf spring pin to prevent it from loosening, but also provides a channel for grease delivery, ensuring sufficient lubrication between the leaf spring pin and leaf spring bushing, thus extending the service life of the leaf spring bracket.

[0058] Preferably, in order to improve oil delivery efficiency, the mounting hole of the grease nozzle 4 is set perpendicular to the axis of the leaf spring pin 2.

[0059] In some specific embodiments, the first oil delivery unit 21 includes: a positioning part 215, a second oil hole 213, and an oil delivery channel 214; wherein,

[0060] A positioning part 215 is disposed on the leaf spring pin 2, and the positioning part 215 is in a limiting and locking engagement with the limiting and locking part 3. The positioning part 215 is provided with a first oil hole 212, which communicates with the second oil supply unit 31. A second oil hole 213 is disposed in the middle of the leaf spring pin 2. An oil supply channel 214 is disposed in the leaf spring pin 2, and the oil supply channel 214 is arranged along the axial direction of the leaf spring pin 2. The oil supply channel 214 communicates with both the first oil hole 212 and the second oil hole 213.

[0061] In some specific embodiments, the oil delivery channel 214 is axially arranged along the leaf spring pin 2 and has an opening at its end. The opening is threaded and threadedly connected to a plug 6. Because the oil delivery channel 214 has a thread at its end, and the leaf spring pin 2 has a plug 6 at its end, the plug 6 is threadedly connected to the end of the oil delivery channel 214 to seal one end of the oil delivery channel 214.

[0062] Understandably, the plug 6 is used to prevent grease from overflowing and to facilitate the removal of the leaf spring pin 2. Preferably, the length of the oil channel 214 is greater than the distance between the second oil hole 213 and the end face of the leaf spring pin 2.

[0063] Specifically, such as Figure 7 As shown, the leaf spring pin 2 has an annular oil groove 22 in the middle, and the bottom of the annular oil groove 22 has the first oil hole 212.

[0064] In some preferred embodiments, such as Figure 5 and Figure 6 As shown, the limiting locking part 3 includes a wedge pin, with a wedge surface 32 and a mating surface 33 on opposite sides of the wedge pin, and the wedge surface 32 is fitted to the leaf spring pin 2.

[0065] Specifically, such as Figure 3 As shown, the second oil delivery unit 31 includes a second drainage groove 311 disposed on the mating surface 33. The bottom of the second drainage groove 311 has a through hole 312, the other end of which is disposed on the wedge-shaped surface 32 and communicates with the first oil delivery unit 21. Optionally, the limiting locking part 3 further includes a locking nut 34, which is disposed at the end of the wedge-shaped pin and is used to lock the wedge-shaped pin.

[0066] It is worth noting that the leaf spring 5 and the leaf spring bracket 1 are connected by the leaf spring pin 2. After the locking nut 34 is tightened, it can ensure that the wedge pin reliably locks the leaf spring pin 2. Since the wedge surface 32 has a small angle and a self-locking function, the wedge pin will not loosen, which can ensure that the leaf spring pin 2 is reliably positioned and installed.

[0067] Furthermore, the positioning part 215 also includes: a concave positioning surface 217, on which a first drainage groove 216 is provided, and a second oil hole 213 is provided at the bottom of the first drainage groove 216.

[0068] It should be noted that in actual assembly, the through hole 312 of the wedge pin cannot be guaranteed to be perfectly aligned with the oil injection hole 12 of the leaf spring bracket 1 and the first oil hole 212 of the leaf spring pin 2. This application addresses this by providing a first drainage groove 216 on the leaf spring pin 2 and a second drainage groove 311 on the wedge pin. This allows grease to be introduced into the oil injection hole 12 and the first oil hole 212, ensuring unobstructed grease filling channels. The plug 6 is connected to the oil supply channel 214 of the leaf spring pin 2 via threads, preventing grease overflow and facilitating the disassembly of the leaf spring pin 2.

[0069] When lubricating the leaf spring mounting structure, the grease enters the grease injection hole 12 at the bottom of the leaf spring bracket 1 through the grease nipple 4, and then enters the second drainage groove 311 of the limiting locking part 3. The grease then enters the second oil hole 213 in the first drainage groove 216 of the leaf spring pin 2 through the through hole 312 in the second drainage groove 311. The grease then enters the oil supply channel 214 through the second oil hole 213 and is transported to the first oil hole 212, flowing between the leaf spring pin 2 and the leaf spring bushing 51, providing lubrication.

[0070] In some alternative embodiments, the wedge pin has a wedge-shaped structure, and the leaf spring pin 2 has a groove on its surface near the threaded connection section that mates with the wedge pin. The wedge pin is equipped with an elastic washer and a nut as a fastening and anti-loosening device. The leaf spring pin 2 is locked by planar friction.

[0071] Furthermore, in order to achieve lightweighting of the parts, the leaf spring pin 2 is also provided with weight reduction holes.

[0072] In some optional embodiments, the grease nozzle 4 is provided with a lubricating component, which has a lubrication hole. It also includes a clamping block and an elastic retaining ring disposed in the lubrication hole. The clamping block cooperates with the lubrication hole and abuts against the elastic retaining ring. The grease nozzle 4 includes a hollow grease nozzle body. The first end of the grease nozzle body is used to connect to a grease supply pipe, and the second end of the grease nozzle body is used to connect to the lubrication hole. The clamping block is provided with a channel for the second end to pass through, and the channel is coaxially disposed with the lubrication hole. The second end is a conical structure, and the bottom of the conical structure is provided with an annular groove for cooperating with the elastic retaining ring. It is understandable that the diameter of the central hole of the elastic retaining ring is smaller than the diameter of the second end of the grease nipple body; the elastic retaining ring and the clamping block can be pre-installed on the part to be lubricated. When the grease nipple 4 needs to be installed, simply insert the second end of the grease nipple body into the lubrication hole through the channel on the clamping block to achieve the clamping of the elastic retaining ring with the annular groove; the elastic retaining ring is elastic, can deform, and can return to its original shape; when the lubrication hole is a round hole, the clamping block is a cylindrical structure that matches the round hole.

[0073] In the grease nozzle 4 provided in this embodiment of the invention, the second end of the grease nozzle body has a tapered structure, which allows the second end to be easily inserted into the elastic retaining ring, causing the elastic retaining ring to deform until it falls into the annular groove. The elastic retaining ring then returns to its original shape, thereby securing the second end and connecting the grease nozzle body to the part to be lubricated. Since the operator only needs to insert the second end of the grease nozzle body into the through hole to secure the elastic retaining ring to the annular groove, the installation of the grease nozzle 4 can be completed without the need for tightening the threads. This greatly reduces the operator's labor intensity and effectively shortens the installation time. Furthermore, because the grease nozzle body eliminates the external thread structure, it will not be scrapped due to thread damage, thus greatly extending the service life of the grease nozzle.

[0074] In summary, this application places the grease nozzle 4 at the bottom of the leaf spring bracket 1, and provides oil delivery units on both the leaf spring pin 2 and the limiting locking part 3. The limiting locking part of this application not only cooperates with the leaf spring pin to prevent it from loosening, but also provides a channel for grease delivery, ensuring sufficient lubrication between the leaf spring pin 2 and the leaf spring bushing 51, thus extending the service life of the leaf spring bracket, leaf spring pin, and leaf spring bushing.

[0075] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0076] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0077] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A leaf spring mounting structure for a vehicle suspension, characterized in that, The utility model relates to a kind of plate spring support (1), the plate spring support (1) bottom is equipped with oil injection hole (12);Plate spring pin (2) is arranged in the plate spring support (1), and the plate spring pin (2) is gap fit with the plate spring bushing (51) of plate spring (5) to form clearance space, first oil delivery unit (21) is arranged in the plate spring pin (2), and the first oil delivery unit (21) is communicated with the clearance space;Limiting locking portion (3) is arranged in the plate spring support (1), and is limit fit with the plate spring pin (2), and second oil delivery unit (31) is arranged in the limiting locking portion (3), and the second oil delivery unit (31) is communicated with the oil injection hole (12) and the first oil delivery unit (21) respectively;Grease nozzle (4) is arranged in the plate spring support (1) bottom, and the grease nozzle (4) is butt joint with the oil injection hole (12). The first oil delivery unit (21) includes: Positioning portion (215) is arranged on the plate spring pin (2), and the positioning portion (215) is limit fit with the limiting locking portion (3), and first oil hole (212) is arranged on the positioning portion (215), and the first oil hole (212) is communicated with the second oil delivery unit (31); Second oil hole (213) is arranged in the middle of the plate spring pin (2); Oil delivery channel (214) is arranged in the plate spring pin (2), and the oil delivery channel (214) is arranged along the axial direction of the plate spring pin (2), and the oil delivery channel (214) is communicated with the first oil hole (212) and the second oil hole (213) simultaneously.

2. The plate spring mounting structure according to claim 1, wherein The positioning portion (215) further includes: The positioning surface (217) is concave, and the first drainage groove (216) is arranged on the positioning surface (217), and the first oil hole (212) is arranged at the bottom of the first drainage groove (216). The middle of the plate spring pin (2) is provided with annular oil groove (22), and the second oil hole (213) is arranged at the bottom of the annular oil groove (22). The middle of the plate spring pin (2) is provided with C-shaped oil groove (23), and the C-shaped oil groove (23) is arranged along the length direction of the plate spring pin (2), and the second oil hole (213) is arranged at the bottom of the C-shaped oil groove (23), and the C-shaped oil groove (23) includes bottom surface (231) and two end surfaces (232), the bottom surface (231) is a plane, and the two end surfaces (232) are both in circular arc shape.

3. The leaf spring mounting structure according to claim 2, wherein The end of the oil delivery channel (214) is provided with a thread, and the end of the plate spring pin (2) is provided with a plug (6), and the plug (6) is connected to the end of the oil delivery channel (214) through thread to block one end of the oil delivery channel (214). The limiting locking portion (3) includes:

4. The plate spring mounting structure according to claim 2, wherein: The second oil delivery unit (31) includes:

5. The plate spring mounting structure according to claim 2, wherein: ​ 6. The plate spring mounting structure according to claim 2, wherein: ​ 7. The plate spring mounting structure according to Claim 1, wherein ​ 8. The leaf spring mounting structure according to claim 7, wherein ​ A second drainage groove (311) is arranged on the abutting surface (33), and a through hole (312) is arranged at the bottom of the second drainage groove (311), and the other end of the through hole (312) is arranged on the wedge surface (32) and communicates with the first oil conveying unit (21).

9. The leaf spring mounting structure according to claim 7, wherein: The limiting and locking part (3) further comprises a locking nut (34), which is arranged at the end of the wedge-shaped pin, and is used for locking the wedge-shaped pin.

10. An automobile characterized by comprising: Comprising: The leaf spring mounting structure according to any one of claims 1-9. The leaf spring mounting structure according to any one of claims 1-9.

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