Plate spring locking structure and vehicle

Abstract

The plate spring locking structure comprises a plate spring support and a plate spring pin, the plate spring support comprises a first section and a second section, the plate spring pin comprises a pin body, a first limiting assembly and a second limiting assembly, the first limiting assembly and the second limiting assembly are arranged at the two ends of the pin body respectively, and the pin body sequentially penetrates through the first section, a plate spring and the second section. The pin body is limited to the first section portion and the second section portion through the first limiting assembly and the second limiting assembly respectively, a groove is formed in the end, close to the first limiting assembly, of the pin body, and at least part of the first limiting assembly is limited in the groove. According to the plate spring locking structure, the plate spring pin and the plate spring support are limited from the two ends, the fixing stability between the plate spring pin and the plate spring support is improved, and in combination with the groove formed in the end, close to the first limiting assembly, of the pin body, the limiting capacity of the first limiting assembly to the pin body can be further improved; therefore, the limiting capacity of the plate spring locking structure is improved, and the locking effect on the plate spring is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle suspension systems, and in particular to a leaf spring locking structure and a vehicle. Background Art

[0002] The front and rear suspension leaf springs of heavy trucks are connected to the frame by leaf spring locking structures such as leaf spring brackets and leaf spring pins. The importance of leaf spring locking structures to the overall strength of the vehicle body suspension system is self-evident.

[0003] However, the locking effect of the leaf spring locking structure in the related art is relatively poor. Utility Model Content

[0004] Based on this, the present application provides a leaf spring locking structure and a vehicle to improve the locking effect of the leaf spring locking structure.

[0005] According to one aspect of the present application, a leaf spring locking structure is provided, the leaf spring locking structure comprising:

[0006] The leaf spring bracket comprises a first section and a second section;

[0007] A leaf spring pin, comprising a pin body and a first limiting assembly and a second limiting assembly respectively arranged at two ends of the pin body, wherein the pin body is sequentially passed through the first section, the leaf spring and the second section, and is respectively limited at the first section and the second section by the first limiting assembly and the second limiting assembly;

[0008] A groove is provided at one end of the pin body close to the first limiting assembly, and at least a portion of the first limiting assembly is limited in the groove.

[0009] In one embodiment, the pin body is provided with an oil guide groove and at least one oil guide hole communicating between the oil guide groove and the outside of the side wall of the pin body facing the leaf spring;

[0010] The oil guide groove is arranged at one end of the pin body close to the first limiting assembly and extends along the axial direction of the leaf spring pin.

[0011] In one embodiment, the oil guide groove includes a first shaft channel, a second shaft channel and a third shaft channel which are sequentially arranged along the axial direction of the leaf spring pin and are connected to each other, and the oil guide hole is penetrated through the third shaft channel along the radial direction of the leaf spring pin;

[0012] Along the radial direction of the leaf spring pin, the sizes of the first shaft track, the second shaft track and the third shaft track gradually decrease.

[0013] In one embodiment, the leaf spring pin further includes a grease nipple, and the grease nipple is disposed at an end of the first shaft channel away from the second shaft channel.

[0014] In one embodiment, the leaf spring bracket includes a bracket body, the first section includes a first limiting half arm and a second limiting half arm provided on the bracket body, and a through slot for the pin body to pass through is defined between the first limiting half arm and the second limiting half arm;

[0015] The first limiting assembly includes a locking bolt and a locking nut matched with the locking bolt. The locking bolt passes through the first limiting half-arm and the second limiting half-arm in sequence, and the locking nut locks the pin body in the through slot.

[0016] In one of the embodiments, the outer side wall of the pin body is provided with the groove opposite to the first limiting assembly, at least a portion of the locking bolt is located in the groove, and an extension direction of the locking bolt intersects with the axial direction of the pin body.

[0017] In one embodiment, a shoulder is provided at one end of the leaf spring pin close to the first limiting assembly. The shoulder protrudes from the pin body in the radial direction of the leaf spring pin and abuts against a side of the first section away from the second section.

[0018] In one embodiment, the second limiting assembly includes an end nut, the leaf spring pin includes an end threaded portion provided on the pin body and adapted to the end nut, the end nut is sleeved on the end threaded portion and abuts against a side of the first section away from the second section.

[0019] In one embodiment, the leaf spring pin further comprises a fixing hole penetrating the end threaded portion along the radial direction of the leaf spring pin, and a fixing groove is formed on the end nut;

[0020] The second limiting assembly also includes a cotter pin, which is passed through the fixing hole and is limited in the fixing groove.

[0021] According to another aspect of the present application, a vehicle is also provided, comprising the above-mentioned leaf spring locking structure.

[0022] The above-mentioned leaf spring locking structure limits the leaf spring pin at the first section and the second section of the leaf spring bracket respectively through the first limiting component and the second limiting component, limits the leaf spring pin and the leaf spring bracket from both ends, improves the fixing stability between the leaf spring pin and the leaf spring bracket, and combined with the groove provided at one end of the pin body close to the first limiting component, it can further improve the limiting ability of the first limiting component on the pin body, thereby improving the limiting ability of the leaf spring locking structure and improving the locking effect of the leaf spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic structural diagram of the leaf spring locking structure of the present application.

[0024] FIG. 2 is a cross-sectional view of the leaf spring locking structure of the present application.

[0025] FIG. 3 is a front cross-sectional view of the pin body.

[0026] FIG. 4 is a side view of the pin body.

[0027] Description of Figure Numbers:

[0028] 10. Leaf spring locking structure;

[0029] 100, leaf spring bracket; 110, first section; 111, first limiting half arm; 112, second limiting half arm; 120, second section; 130, bracket body;

[0030] 200, leaf spring pin; 210, pin body; 211, oil guide groove; 2111, first shaft channel; 2112, second shaft channel; 2113, third shaft channel; 212, oil guide hole; 213, groove; 220, first limit assembly; 221, locking bolt; 222, locking nut; 230, second limit assembly; 231, end nut; 232, end threaded portion; 233, fixing hole; 234, fixing groove; 235, cotter pin; 240, grease nipple; 250, shaft shoulder 250; 260, leaf spring. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] The present application provides a leaf spring locking structure 10, which aims to improve the locking effect of the leaf spring locking structure 10, so as to improve the axial limiting ability of the leaf spring 260, and the leaf spring locking structure 10 of the present application also has a better lubrication effect.

[0038] Referring to FIG. 1 and FIG. 2 , the leaf spring locking structure 10 includes a leaf spring bracket 100 and a leaf spring pin 200. The leaf spring bracket 100 is arranged on the vehicle body. The leaf spring pin 200 limits the installation of the leaf spring 260 on the leaf spring bracket 100. In other words, the leaf spring locking structure 10 is used to install the leaf spring 260 on the vehicle body such as the frame. The leaf spring bracket 100 includes a first section 110 and a second section 120. One end of the leaf spring 260 is installed between the first section 110 and the second section 120. The leaf spring pin 200 includes a pin body 210 and a first limiting assembly 220 and a second limiting assembly 230 respectively arranged at both ends of the pin body 210. The pin body 210 is sequentially arranged in the first section 110, the leaf spring 260 and the second section 120, and is respectively limited to the first section 110 and the second section 120 by the first limiting assembly 220 and the second limiting assembly 230. It can be understood that one end of the pin body 210 is limited to the first section 110 by the first limiting assembly 220, and the other end of the pin body 210 is limited to the second section 120 by the second limiting assembly 230. The leaf spring pin 200 and the leaf spring bracket 100 are limited from both ends to improve the fixing stability between the leaf spring pin 200 and the leaf spring bracket 100. A groove 213 is provided at one end of the pin body 210 close to the first limiting assembly 220, and at least part of the first limiting assembly 220 is limited in the groove 213, so that the limiting ability of the first limiting assembly 220 on the pin body 210 can be further improved, thereby improving the limiting ability of the leaf spring locking structure 10, improving the locking effect on the leaf spring 260, or improving the axial limiting ability of the leaf spring 260.

[0039] 3 and 4 , the pin body 210 is provided with an oil guide groove 211 and at least one oil guide hole 212 connected between the oil guide groove 211 and the side wall of the pin body 210 facing the leaf spring 260. The oil guide groove 211 is provided at one end of the pin body 210 close to the first limit assembly 220 and extends along the axial direction of the leaf spring pin 200 to guide oil. The oil flows out through the oil guide groove 211 and the oil guide hole 212 to the side wall or the outside of the pin body 210 facing the leaf spring 260 to achieve lubrication between the pin body 210 and the leaf spring 260. In addition, by providing at least one oil guide hole 212, multiple oil passages can be achieved to improve the lubrication effect.

[0040] In some embodiments, the oil guide groove 211 includes a first shaft channel 2111, a second shaft channel 2112, and a third shaft channel 2113 which are sequentially arranged along the axial direction of the leaf spring pin 200 and are connected to each other, and the oil guide hole 212 is penetrated in the third shaft channel 2113 along the radial direction of the leaf spring pin 200. The sizes of the first shaft channel 2111, the second shaft channel 2112, and the third shaft channel 2113 gradually decrease along the radial direction of the leaf spring pin 200. That is, the shaft channel size closer to the oil guide hole 212 is smaller, which can achieve oil control and avoid excessive lubricating oil overflow. At the same time, the relative radial size of the first shaft channel 2111 and the second shaft channel 2112 is larger than that of the third shaft channel 2113, which can be beneficial to store more lubricating oil and improve lubrication capacity.

[0041] The leaf spring pin 200 also includes a grease nipple 240, which is disposed at one end of the first shaft channel 2111 away from the second shaft channel 2112, and is used to store lubricating oil and facilitate the replenishment of lubricating oil. The grease nipple 240 cooperates with the setting of the oil guide groove 211 to store more lubricating oil and improve the lubrication capacity.

[0042] 1 , the leaf spring bracket 100 includes a bracket body 130, the first section 110 includes a first limiting half arm 111 and a second limiting half arm 112 provided on the bracket body 130, a through slot for the pin body 210 to pass through is defined between the first limiting half arm 111 and the second limiting half arm 112, the first limiting assembly 220 includes a locking bolt 221 and a locking nut 222 matched with the locking bolt 221, the locking bolt 221 sequentially passes through the first limiting half arm 111 and the second limiting half arm 112, and the pin body 210 is locked and limited in the through slot by the locking nut 222, thereby achieving fixation between the pin body 210 and the first section 110,

[0043] 3 and 4, the outer wall of the pin body 210 is provided with the above-mentioned groove 213 opposite to the first limiting assembly 220, at least part of the locking bolt 221 is located in the groove 213, and the extending direction of the locking bolt 221 intersects with the axial direction of the pin body 210. Thus, the axial limiting capability of the pin body 210 can be improved, wherein the axial direction refers to the direction from the first section 110 to the second section 120 or the direction from the first limiting assembly 220 to the second limiting assembly 230.

[0044] A shoulder 250 is provided at one end of the leaf spring pin 200 close to the first limiting assembly 220. The shoulder 250 protrudes from the pin body 210 along the radial direction of the leaf spring pin 200 and abuts against the side of the first section 110 away from the second section 120. That is, by abutting against the first section 110 by the shoulder 250, the axial limiting ability of the pin body 210 can be further improved, and the axial shaking of the pin body 210 can be avoided, thereby improving the installation stability of the leaf spring 260.

[0045] With reference to Figures 1, 2, 3 and 4, the second limiting assembly 230 includes an end nut 231, and the leaf spring pin 200 includes an end threaded portion 232 provided on the pin body 210 and adapted to the end nut 231. The end nut 231 is sleeved on the end threaded portion 232 and abuts against the side of the first section 110 that is away from the second section 120 to achieve the limiting of the pin body 210 relative to the second section 120. It can be understood that the pin body 210 is sequentially penetrated through the first section 110, the leaf spring 260 and the second section 120, and the shaft shoulder 250 is used to abut against the side of the first section 110 that is away from the second section 120. The end nut 231 is used to cooperate with the end threaded portion 232 to abut against the side of the second section 120 that is away from the first section 110 to achieve the locking connection between the pin body 210, the leaf spring 260 and the leaf spring bracket 100.

[0046] The leaf spring pin 200 further includes a fixing hole 233 which is penetrated in the end threaded portion 232 along the radial direction of the leaf spring pin 200, a fixing groove 234 is provided on the end nut 231, and the second limiting assembly 230 further includes a cotter pin 235 which is penetrated in the fixing hole 233 and limited in the fixing groove 234. The setting of the fixing hole 233, the cotter pin 235 and the fixing groove 234 can further improve the fixation between the end nut 231 and the end threaded portion 232 of the pin body 210, and improve the axial limiting effect. In some embodiments, the end nut 231 adopts a slot nut.

[0047] The present application also provides a vehicle, including the above-mentioned leaf spring locking structure 10, by which the leaf spring 260 is fixed to the frame of the vehicle, which can improve the connection stability between the leaf spring 260 and the frame. The leaf spring locking structure 10 of the present application limits the leaf spring pin 200 to the first section 110 and the second section 120 of the leaf spring bracket 100 respectively through the first limiting component 220 and the second limiting component 230, and limits the leaf spring pin 200 and the leaf spring bracket 100 from both ends, thereby improving the fixing stability between the leaf spring pin 200 and the leaf spring bracket 100, and improving the fixing stability of the leaf spring 260. In addition, the groove 213 provided at one end of the pin body 210 close to the first limiting component 220 can further improve the limiting ability of the first limiting component 220 on the pin body 210, thereby improving the limiting ability of the leaf spring locking structure 10 and improving the locking effect of the leaf spring 260.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A leaf spring locking structure, characterized in that: The leaf spring locking structure comprises: The leaf spring bracket comprises a first section and a second section; A leaf spring pin, comprising a pin body and a first limiting assembly and a second limiting assembly respectively arranged at two ends of the pin body, wherein the pin body is sequentially passed through the first section, the leaf spring and the second section, and is respectively limited at the first section and the second section by the first limiting assembly and the second limiting assembly; A groove is provided at one end of the pin body close to the first limiting assembly, and at least a portion of the first limiting assembly is limited in the groove; The pin body is provided with an oil guide groove and at least one oil guide hole communicating between the oil guide groove and the outside of the side wall of the pin body facing the leaf spring; The oil guide groove is arranged at one end of the pin body close to the first limiting assembly and extends along the axial direction of the leaf spring pin.

2. The leaf spring locking structure according to claim 1, characterized in that: The oil guide groove comprises a first shaft channel, a second shaft channel and a third shaft channel which are sequentially arranged along the axial direction of the leaf spring pin and are connected to each other, and the oil guide hole is penetrated through the third shaft channel along the radial direction of the leaf spring pin; Along the radial direction of the leaf spring pin, the sizes of the first shaft track, the second shaft track and the third shaft track gradually decrease.

3. The leaf spring locking structure according to claim 2, characterized in that: The leaf spring pin also includes a grease nipple, and the grease nipple is arranged at an end of the first shaft channel away from the second shaft channel.

4. The leaf spring locking structure according to claim 1, characterized in that: The leaf spring bracket includes a bracket body, the first section includes a first limiting half arm and a second limiting half arm provided on the bracket body, and a through slot for the pin body to pass through is defined between the first limiting half arm and the second limiting half arm; The first limiting assembly includes a locking bolt and a locking nut matched with the locking bolt. The locking bolt passes through the first limiting half-arm and the second limiting half-arm in sequence, and the locking nut locks the pin body in the through slot.

5. The leaf spring locking structure according to claim 4, characterized in that: The outer side wall of the pin body is provided with the groove opposite to the first limiting assembly, at least a portion of the locking bolt is located in the groove, and an extending direction of the locking bolt intersects with the axial direction of the pin body.

6. The leaf spring locking structure according to claim 1, characterized in that: An end of the leaf spring pin close to the first limiting assembly is provided with a shaft shoulder, which protrudes from the pin body in the radial direction of the leaf spring pin and abuts against a side of the first section away from the second section.

7. The leaf spring locking structure according to claim 1, characterized in that: The second limiting assembly includes an end nut, the leaf spring pin includes an end threaded portion provided on the pin body and adapted to the end nut, the end nut is sleeved on the end threaded portion and abuts against a side of the first section away from the second section.

8. The leaf spring locking structure according to claim 7, characterized in that: The leaf spring pin further comprises a fixing hole which is penetrated through the end threaded portion along the radial direction of the leaf spring pin, and a fixing groove is formed on the end nut; The second limiting assembly also includes a cotter pin, which is passed through the fixing hole and is limited in the fixing groove.

9. A vehicle, characterized in that: It comprises a leaf spring locking structure as described in any one of claims 1 to 8.

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