Agricultural machinery pin shaft convenient to maintain

Abstract

The utility model discloses an agricultural mechanical pin shaft convenient to maintain, and relates to the field of mechanical pin shafts. The hinge pin comprises a hinge pin body, a clamping mechanism is arranged in a through groove in a clamping mode, the clamping mechanism comprises a clamping cover, a limiting block is arranged at one end of a threaded rod in a rotating mode, a plurality of sets of spring pieces are arranged on one side of the clamping cover, and clamping blocks are arranged on one sides of the spring pieces. By means of the characteristic of threaded connection, the abutting force of the limiting block on the inclined faces of the spring piece and the clamping block is gradually reduced, meanwhile, after the spring piece and the clamping block lose the abutting force, the spring piece and the clamping block gradually retract by means of the elastic reset capacity of the spring piece and the clamping block, the clamping block is separated from the clamping groove, then the clamping ring can be easily detached, replacement or maintenance is conducted, the pin shaft is more convenient to maintain, and the service life of the pin shaft is prolonged. And when the limiting structure on one side is damaged, the limiting structure can be quickly replaced, so that the use efficiency and convenience of the pin shaft are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical pin shafts, in particular to an agricultural machinery pin shaft which is easy to maintain. Background Art

[0002] As a key connecting component of agricultural machinery, agricultural machinery pins feature reliable operation, easy disassembly, high strength, and superior wear resistance. They are widely used to connect mechanical components such as drive shafts, tools, and travel wheels, ensuring the stability and efficiency of mechanical operation. Existing agricultural machinery pins typically consist of a pin cover, a pin body, a slot, and a limit rod. In actual operation, frequent friction between the slot and the mechanical connector can easily cause it to deform. Given its integrated design, deformation of the slot requires the entire pin to be replaced, which has high maintenance costs. However, if not replaced, the deformed pin may also pose a safety hazard to the operation of the machinery. Therefore, there is an urgent need to design an easy-to-maintain agricultural machinery pin. Utility Model Content

[0003] Based on this, the purpose of the present invention is to provide an agricultural machinery pin shaft that is easy to maintain, so as to solve the technical problem that the entire pin shaft needs to be replaced due to wear of the card slot, which is costly.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pin shaft for agricultural machinery that is easy to maintain, comprising a pin shaft body, a through groove being provided at one end of the pin shaft body, a locking mechanism being provided inside the through groove, the locking mechanism comprising a card cover, a screw being threadedly connected to the inner side of the card cover, a limit block being rotatably provided at one end of the screw, multiple groups of spring sheets being provided on one side of the card cover, a locking block being provided on one side of the spring sheet, a locking groove being provided on the inner side of the through groove, and a retaining ring being provided on the side of the card cover away from the pin shaft body.

[0005] By adopting the above technical solution, when it is necessary to disassemble the locking mechanism and the retaining ring, the screw must first be twisted in the opposite direction, and the threaded connection between the screw and the card cover is used to gradually reduce the inclined abutment force of the limit block on the spring sheet and the card block. At the same time, after losing this abutment force, the spring sheet and the card block will rely on their own elastic reset ability to gradually retract. This retraction process will gradually release the locking relationship between the card block and the card slot, and eventually completely disengage. After that, the retaining ring can be easily removed for necessary replacement or repair work.

[0006] Furthermore, the plurality of spring sheets and the clamping blocks correspond to each other one by one and are arranged in an equidistant ring shape, and the clamping blocks are engaged with the clamping slots.

[0007] By adopting the above technical solution, it is ensured that the card block can be evenly and stably inserted into the card slot. This equidistant annular arrangement not only improves the connection stability of the pin shaft, but also enables the card block to evenly distribute pressure when subjected to force.

[0008] Furthermore, a cavity is provided on the inner side of the clamping ring, a nut is provided on one end of the screw, and the nut is located in the cavity.

[0009] By adopting the above technical solution, not only the screw will not be obstructed by the retaining ring during the screwing process, but also the nut will not be exposed, thereby avoiding damage caused by collision or wear of the nut.

[0010] Furthermore, one side of the cross section of the plurality of the clamping blocks and the limiting blocks is a wedge-shaped structure, and the outer side of the limiting block abuts against the inner sides of the plurality of the clamping blocks.

[0011] By adopting the above technical solution, the limit block can easily abut and push the card block to expand outward. This wedge-shaped structure not only increases the contact area and friction between the limit block and the card block, but also enables the card block to distribute pressure more evenly when subjected to pressure.

[0012] Furthermore, a fixing block is provided on one side of the card cover, a limiting groove is provided on the surface of the fixing block, and the inner side of the limiting groove is threadedly connected to a limiting rod.

[0013] By adopting the above technical solution, a stable installation position is provided for the limit rod, and the limit rod is fixed in the limit groove through a threaded connection, which not only enhances the overall stability of the pin shaft, but also enables the pin shaft to adapt more flexibly to different usage scenarios.

[0014] Furthermore, a pin cover is provided at the other end of the pin body.

[0015] By adopting the above technical solution, not only the interior of the pin is protected, but also the overall aesthetics of the pin is improved. The pin cover can effectively prevent dust, moisture and other impurities from entering the interior of the pin, thereby extending the service life of the pin.

[0016] In summary, the present invention has the following beneficial effects:

[0017] The spring and the block are then threaded together to engage with the clamping groove, and the spring and the block are then engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove, and the clamping groove is engaged with the clamping groove,

[0018] 2. The utility model realizes a stable connection between the pin shaft body and the agricultural implement by setting a limit groove and a limit rod, engaging a plurality of card blocks with the card groove. At this time, the fixing block is part of the card cover, and the limit groove opened on its surface plays a key role. The limit groove not only provides a precise plug-in point for the traditional pin shaft and the external locking member, but also ensures that the locking member can be firmly fixed on the pin shaft body. Then, by installing the limit rod inside the limit groove, the stability and safety of the pin shaft are further enhanced. The threaded connection between the limit rod and the limit groove enables the pin shaft to resist external forces and vibrations, avoiding safety hazards caused by loosening or falling off. At the same time, this installation method also facilitates users to quickly adjust or replace the pin shaft according to actual needs, thereby improving the convenience and practicality of the pin shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the first embodiment of the present invention;

[0021] Figure 3 This is a side structural diagram of the first embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present utility model;

[0023] Figure 5 This is a schematic cross-sectional view of the second embodiment of the present invention;

[0024] Figure 6 For this utility model Figure 5 A schematic diagram of the enlarged structure at point A;

[0025] Figure 7 This is a side structural diagram of the second embodiment of the present invention.

[0026] In the figure: 1. Pin body; 2. Pin cover; 3. Engaging mechanism; 301. Card cover; 302. Nut; 303. Screw; 304. Limit block; 305. Card slot; 306. Card block; 307. Spring sheet; 4. Through slot; 5. Limit slot; 6. Limit rod; 7. Fixing block; 8. Snap ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" 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, or it can be a connection between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The following describes an embodiment of the present invention based on its overall structure.

[0031] Example 1:

[0032] A pin shaft for agricultural machinery that is easy to maintain, such as Figure 1-Figure 7As shown, it includes a pin shaft body 1, a through slot 4 is provided at one end of the through slot 4, a locking mechanism 3 is provided inside the through slot 4, the locking mechanism 3 includes a card cover 301, the inner side of the card cover 301 is threadedly connected to a screw rod 303, one end of the screw rod 303 is rotatably provided with a limit block 304, one side of the card cover 301 is provided with multiple groups of spring leaves 307, one side of the spring leaves 307 is provided with a block 306, a card slot 305 is provided on the inner side of the through slot 4, and a snap ring 8 is provided on the side of the card cover 301 away from the pin shaft body 1. When the locking mechanism 3 and the snap ring 8 need to be disassembled, the screw rod 303 needs to be screwed in the opposite direction first, and the threaded connection between the screw rod 303 and the card cover 301 is used. The relationship causes the limit block 304 to gradually reduce the inclined surface contact force on the spring sheet 307 and the block 306. At the same time, after losing this contact force, the spring sheet 307 and the block 306 will rely on their own elastic reset ability to begin to gradually retract. This retraction process will gradually release the engagement relationship between the block 306 and the slot 305, and eventually completely disengage. After that, the retaining ring 8 can be easily removed for necessary replacement or repair work, which not only makes the maintenance of the pin shaft body 1 more convenient and efficient, but also when the limiting structure on one side of the pin shaft body 1 is damaged, it can be quickly replaced, thereby greatly improving the efficiency and convenience of the use of the entire pin shaft, and also extending the service life of the pin shaft.

[0033] See Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 The plurality of spring sheets 307 and the card blocks 306 correspond to each other one by one and are arranged in an equidistant ring pattern, and the card blocks 306 are engaged with the card slots 305, ensuring that the card blocks 306 can be evenly and stably engaged with the card slots 305. This equidistant ring pattern not only improves the connection stability of the pin shaft, but also enables the card blocks 306 to evenly distribute pressure when subjected to force, thereby avoiding damage caused by uneven force. At the same time, the tight engagement of the card blocks 306 and the card slots 305 effectively prevents the pin shaft from loosening or falling off during use, thereby further improving the safety and reliability of the pin shaft.

[0034] See Figure 1 、 Figure 2 、 Figure 3A cavity is provided on the inner side of the retaining ring 8, and a nut 302 is provided at one end of the screw 303, and the nut 302 is located in the cavity, which not only prevents the screw 303 from being hindered by the retaining ring 8 during the screwing process, but also ensures that the nut 302 will not be exposed, thereby avoiding damage caused by collision or wear of the nut 302. At the same time, the nut 302 is located in the cavity, which also fixes and limits the screw 303, preventing the screw 303 from loosening or falling off due to vibration or external force during use.

[0035] See Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 The cross-sections of the plurality of the blocks 306 and the limit blocks 304 are all wedge-shaped structures. The outer sides of the limit blocks 304 abut against the inner sides of the plurality of the block blocks 306, so that the limit blocks 304 can easily abut and push the block 306 to expand outward. This wedge-shaped structure not only increases the contact area and friction between the limit blocks 304 and the block 306, but also enables the block 306 to distribute the pressure more evenly when subjected to the abutting force, thereby avoiding damage caused by excessive local pressure. At the same time, the wedge-shaped abutment between the limit blocks 304 and the block 306 also realizes the rapid disassembly and assembly of the pin shaft, thereby improving maintenance efficiency.

[0036] Example 2:

[0037] See Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 A fixing block 7 is also provided on one side of the card cover 301, and a limiting groove 5 is provided on the surface of the fixing block 7. The inner side of the limiting groove 5 is threadedly connected to the limiting rod 6, providing a stable installation position for the limiting rod 6. The limiting rod 6 is fixed in the limiting groove 5 by the threaded connection, which not only enhances the overall stability of the pin shaft, but also enables the pin shaft to be more flexibly adapted to different usage scenarios. At the same time, the threaded connection of the limiting rod 6 also facilitates users to quickly adjust or replace according to actual needs, further improving the convenience and practicality of the pin shaft.

[0038] See Figure 1 、 Figure 4 、 Figure 5A pin cover 2 is provided at the other end of the pin body 1, which not only protects the inside of the pin, but also increases the overall aesthetics of the pin. The pin cover 2 can effectively prevent dust, moisture and other impurities from entering the inside of the pin, thereby extending the service life of the pin. At the same time, the convenient disassembly and assembly of the pin cover 2 also facilitates users to conduct regular inspections and maintenance of the pin, ensuring that the pin is always in good working condition. In addition, the pin cover 2 can also be customized according to actual needs to meet the personalized needs of different users.

[0039] The implementation principle of the present utility model is as follows: Example 1: First, several spring pieces 307 and the block 306 are inserted into the inner side of the through groove 4, and then the screw 303 is screwed to make the screw 303 and the card cover 301 be threadedly connected, so that the limit block 304 gradually presses the several spring pieces 307 and the block 306 on the inclined surface, and causes the block 306 to gradually expand outward, and the block 306 is engaged with the card groove 305 on the inner side of the through groove 4. At the same time, the snap ring 8 on one side can be used as a traditional The limiting structure on the other side of the pin shaft body 1 realizes the limiting connection function of the agricultural implement; when it is necessary to disassemble the engaging mechanism 3 and the snap ring 8, by twisting the screw rod 303 and utilizing the threaded connection between the screw rod 303 and the card cover 301, the limiting block 304 gradually reduces the inclined surface abutting force on the several card blocks 306. At the same time, the several spring leaves 307 gradually perform elastic reset operations, causing the card block 306 to disengage from the card slot 305. After that, the snap ring 8 can be disassembled and replaced or disassembled for use.

[0040] Example 2: According to the principle of Example 1, several blocks 306 are engaged with the slots 305. At this time, the limit slots 5 provided on the fixed block 7 can be used as the connection point between the traditional pin shaft and the external locking member. The limit rod 6 can be installed inside the limit slot 5 to complete the installation and use of the pin shaft.

[0041] In this embodiment, the pin shaft can be divided into two parts by the locking mechanism 3. When the limiting structure on one side is damaged, it can be disassembled and replaced in time, thereby improving the convenience of using the pin shaft.

[0042] Parts not involved in the present invention are the same as those in the prior art or can be implemented by using the prior art, and will not be described in detail here.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A pin shaft for agricultural machinery that is easy to maintain, characterized by: The invention comprises a pin shaft body (1), one end of the pin shaft body (1) is provided with a through slot (4), the interior of the through slot (4) is provided with a locking mechanism (3), the locking mechanism (3) comprises a card cover (301), the inner side of the card cover (301) is threadedly connected with a screw rod (303), one end of the screw rod (303) is rotatably provided with a limit block (304), one side of the card cover (301) is provided with multiple groups of spring sheets (307), one side of the spring sheets (307) is provided with a locking block (306), the inner side of the through slot (4) is provided with a locking slot (305), and the side of the card cover (301) away from the pin shaft body (1) is provided with a snap ring (8).

2. The agricultural machinery pin shaft that is easy to maintain according to claim 1, characterized in that: The plurality of spring sheets (307) and the clamping blocks (306) correspond to each other and are arranged in an equidistant annular pattern, and the clamping blocks (306) are engaged with the clamping slots (305).

3. The agricultural machinery pin shaft that is easy to maintain according to claim 1, characterized in that: A cavity is provided on the inner side of the clamping ring (8), and a nut (302) is provided at one end of the screw rod (303), and the nut (302) is located in the cavity.

4. The agricultural machinery pin shaft that is easy to maintain according to claim 1, characterized in that: One side of the cross section of the plurality of the clamping blocks (306) and the limiting block (304) is a wedge-shaped structure, and the outer side of the limiting block (304) abuts against the inner sides of the plurality of the clamping blocks (306).

5. The agricultural machinery pin shaft that is easy to maintain according to claim 1, characterized in that: A fixing block (7) is further provided on one side of the card cover (301), a limiting groove (5) is provided on the surface of the fixing block (7), and the inner side of the limiting groove (5) is threadedly connected to a limiting rod (6).

6. The agricultural machinery pin shaft that is easy to maintain according to claim 1, characterized in that: The other end of the pin shaft body (1) is provided with a pin shaft cover (2).

Images