Spline shaft protection tool convenient to use

Abstract

The utility model relates to the technical field of protection tools, and discloses a spline shaft protection tool convenient to use, which comprises a protection tool main body, one side of the protection tool main body is connected with a spline shaft body, and the other side of the protection tool main body is provided with a mounting assembly used for connecting the spline shaft body; a cone frustum is arranged on one side of the protection tool body, a cylinder is integrally formed on one side of the cone frustum, a plurality of clamping jaws are integrally formed on one side of the cylinder, limiting grooves are formed between the clamping jaws, inserting grooves are formed between the adjacent clamping jaws, fillets are arranged at one ends of the clamping jaws, a handle is integrally formed on the other side of the cone frustum, and a protection frame is integrally formed on one side of the handle. When the spline shaft body is installed on a sliding bearing of a supporting plate and the inner side of an oil seal through the protection tool body, the outer surface of the oil seal can be effectively prevented from being scratched, and it is guaranteed that the oil seal cannot be damaged by sharp edges in the installation process under the action of the round corners and the clamping jaws.

Description

Technical Field

[0001] The utility model relates to the technical field of protective tooling, in particular to a convenient-to-use spline shaft protective tooling. Background Art

[0002] Spline shaft is a kind of mechanical transmission. It has the same function as flat key, semicircular key and wedge key, which are used to transmit mechanical torque. There are longitudinal keyways on the surface of the shaft, and the rotating parts on the shaft also have corresponding keyways, which can keep rotating synchronously with the shaft. While rotating, some can also slide longitudinally on the shaft, such as the gear shift gear of the gearbox.

[0003] The spline shaft is a common driving method for high-pressure common rail fuel pumps. During the assembly of the high-pressure fuel pump, the surface of the spline shaft is prone to scratch the assembly parts in contact with it because the fitting clearance between the outer diameter of the spline and the sliding bearing is small and the outer diameter of the spline shaft exceeds the inner diameter of the oil seal in a free state. Therefore, when the spline shaft is installed, its surface is prone to scratching the assembly parts in contact with it. Therefore, a convenient spline shaft protection tooling is proposed. Summary of the invention

[0004] The purpose of the utility model is to provide an easy-to-use spline shaft protection tool to solve the problem that the spline shaft is used as a common driving method for a high-pressure common rail oil pump as mentioned in the above background technology. During the assembly process of the high-pressure oil pump, due to the small matching clearance between the outer diameter of the spline and the sliding bearing, and the outer diameter of the spline shaft exceeds the inner diameter of the oil seal in a free state, when the spline shaft is installed, its surface is easily scratched The assembly parts in contact with it are the problem.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a convenient-to-use spline shaft protection tool, comprising a protection tool body, one side of the protection tool body is connected to the spline shaft body, and the other side of the protection tool body is provided with a mounting assembly for connecting the spline shaft body;

[0006] A frustum is provided on one side of the protective tool body, a cylinder is integrally formed on one side of the frustum, a plurality of claws are integrally formed on one side of the cylinder, limiting grooves are provided between the claws, insertion grooves are provided between adjacent claws, a rounded corner is provided at one end of the claw, a handle is integrally formed on the other side of the frustum, and a protective frame is integrally formed on one side of the handle.

[0007] Preferably, ventilation holes are provided inside the truncated cone, the handle and the protective frame, and the ventilation holes are connected to the limiting grooves.

[0008] Preferably, the spline end of the spline shaft body is inserted into the inner side of the plurality of insertion grooves, and one side of the claw is located outside the spline end of the spline shaft body.

[0009] Preferably, one end of the bottom surface of the truncated cone with a small diameter is located on one side of the handle, and one end of the bottom surface of the truncated cone with a large diameter is located on one side of the cylinder.

[0010] Preferably, the mounting assembly comprises a support plate, a through hole is formed on one side of the support plate, and a sliding bearing and an oil seal are respectively mounted on the inner wall of the through hole.

[0011] Preferably, the sliding bearing is located on the left side of the oil seal, and the outer side of the truncated cone is inserted into the inner side of the sliding bearing and the oil seal in sequence.

[0012] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0013] By protecting the main body of the tooling, the outer surface of the oil seal can be effectively prevented from being scratched when installing the spline shaft body to the sliding bearing and the inner side of the oil seal of the support plate. With the help of the fillet and the claws, it is ensured that the oil seal will not be damaged by sharp edges during the installation process.

[0014] Through the cooperation between the claw and the inner spline groove of the spline shaft body, the protective tool body and the spline shaft body can be kept on the same axis, thereby greatly improving the stability of installation;

[0015] The handle makes it easier to take and use the spline shaft body during installation. After installation, the protective tooling body can be easily removed from the sliding bearing and oil seal, which improves work efficiency.

[0016] By using the frustum and cylinder to protect the main body of the tooling, the frustum gradually expands the diameter of the oil seal, so that the spline shaft body and the support plate are always in a vertical state during installation, and the spline shaft body will not be skewed during installation, causing scratches on the surface of the spline shaft body. The problem of assembly difficulty caused by the extremely small gap between the spline shaft body and the oil seal and the sliding bearing is solved, making the assembly process smoother and improving the accuracy and success rate of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0020] Figure 3 This is a schematic diagram of the first spline shaft structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the second spline shaft of the utility model;

[0022] Figure 5 This is a schematic diagram of the first sealed bearing structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the second sealed bearing structure of the utility model.

[0024] Explanation of the reference numerals: 1. Protective tool body; 101. Cone; 102. Cylinder; 103. Fillet; 104. Claw; 105. Insertion slot; 106. Handle; 107. Vent; 108. Protective frame; 109. Limiting slot; 2. Spline shaft body; 3. Mounting assembly; 301. Support plate; 302. Oil seal; 303. Through hole; 304. Sliding bearing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. Example

[0027] In the prior art, the spline shaft is a common driving method for the high-pressure common rail oil pump. During the assembly of the high-pressure oil pump, the surface of the spline shaft is easily scratched by the assembly parts in contact with it because the fitting clearance between the outer diameter of the spline and the sliding bearing is small and the outer diameter of the spline shaft exceeds the inner diameter of the oil seal in the free state.

[0028] See also Figure 1-6The utility model provides a technical solution: a convenient spline shaft protection tool, comprising a protection tool body 1, the material of the protection tool body 1 is plastic, so that the production cost of the protection tool body 1 is low, a spline shaft body 2 is connected to one side of the protection tool body 1, and a mounting assembly 3 for connecting the spline shaft body 2 is arranged on the other side of the protection tool body 1, and the spline shaft body 2 is mounted on the inner side of the sliding bearing 304 and the oil seal 302 on one side of the support plate 301;

[0029] A frustum 101 is provided on one side of the protective tool body 1, and a cylinder 102 is integrally formed on one side of the frustum 101. A plurality of claws 104 are integrally formed on one side of the cylinder 102. A limiting groove 109 is provided between the plurality of claws 104. The spline end of the spline shaft body 2 is inserted into the inner side of the plurality of claws 104. At this time, the fillet 103 fits the inner side of the keyway of the inner spline of the spline shaft body 2. At the same time, the fillet 103 prevents the sharp edge of the claw 104 from scratching the assembled oil seal 302 during installation. An insertion groove 105 is provided between adjacent claws 104. A fillet 103 is provided at one end of the claw 104. A handle 106 is integrally formed on the other side of the frustum 101. A protective frame 108 is integrally formed on one side of the handle 106. The claw 104 can cooperate with the inner spline groove of the spline shaft body 2, so that the protective tool body 1 and the spline shaft body 2 are on the same axis, making the installation of the spline shaft body 2 more stable.

[0030] The truncated cone 101, the handle 106 and the protective frame 108 are all provided with ventilation holes 107. The handle 106 is pulled to one side so that the protective frame 108 passes through the inner wall of the sliding bearing 304 and the oil seal 302 in sequence, and then the spline shaft body 2 is pushed so that the handle 106 passes through the inner wall of the sliding bearing 304 and the oil seal 302. The ventilation hole 107 is connected with the limit groove 109. The spline end of the spline shaft body 2 is inserted into the inner side of the plurality of insertion grooves 105, and one side of the claw 104 is located on the outer side of the spline end of the spline shaft body 2. One end of the small diameter bottom surface of the truncated cone 101 is located on the side of the handle 106, and one end of the large diameter bottom surface of the truncated cone 101 is located on the side of the cylinder 102. The bottom surface of the truncated cone 101 with a smaller diameter preferentially contacts the inner wall of the oil seal 302. As the outer diameter of the cylinder 102 gradually increases, the diameter of the oil seal 302 is expanded to the diameter of the cylinder 102. At this time, the cylinder 102 first contacts the inner wall of the sliding bearing 304, and the cylinder 102 forms a center self-positioning for the spline shaft body 2 to prevent tilting and scratching the surface of the assembled spline shaft body 2.

[0031] The mounting assembly 3 includes a support plate 301, a through hole 303 is formed on one side of the support plate 301, and a sliding bearing 304 and an oil seal 302 are respectively installed on the inner wall of the through hole 303, the sliding bearing 304 is located on the left side of the oil seal 302, and the inner spline end of the spline shaft body 2 passes through one side of the sliding bearing 304 and the oil seal 302, and at the same time, the outer side of the rotating shaft end of the spline shaft body 2 is inserted into the inner side of the sliding bearing 304, and at the same time, the outer side of the rotating shaft of the spline shaft body 2 is attached to the inner side wall of the oil seal 302. At this time, the spline shaft body 2 and the support plate 301 are installed, and the outer side of the frustum 101 is inserted into the inner side of the sliding bearing 304 and the oil seal 302 in turn. The use of the protective tooling body 1 makes it very convenient to install the spline shaft body 2 on the inner side of the oil seal 302 and the sliding bearing 304 of the mounting assembly 3, which effectively solves the problem of assembly difficulty caused by the extremely small gap between the spline shaft body 2 and the oil seal 302 and the sliding bearing 304.

[0032] Working principle or structural principle: when the spline shaft body 2 needs to be installed on the inner side of the sliding bearing 304 and the oil seal 302 on one side of the support plate 301, first insert the spline end of the spline shaft body 2 into the inner side of the plurality of claws 104, at this time, the fillet 103 fits the inner side of the keyway of the inner spline of the spline shaft body 2, and at the same time, the fillet 103 prevents the sharp edge of the claw 104 from scratching the assembled spline shaft body 2 during the installation process, and the claw 104 can cooperate with the inner spline groove of the spline shaft body 2, so that the protective tooling body 1 and the spline shaft body 2 are on the same axis, making the installation of the spline shaft body 2 more stable;

[0033] At this time, the handle 106 is pulled to one side, so that the protective frame 108 passes through the inner wall of the sliding bearing 304 and the oil seal 302 in turn, and then the spline shaft body 2 is pushed so that the handle 106 passes through the inner wall of the sliding bearing 304 and the oil seal 302. At this time, the bottom surface of the smaller diameter of the cone 101 first contacts the inner wall of the oil seal 302. As the outer diameter of the cylinder 102 gradually increases, the diameter of the oil seal 302 is expanded to the diameter of the cylinder 102. At this time, the cylinder 102 first contacts the inner wall of the sliding bearing 304, and the cylinder 102 forms a center self-positioning for the spline shaft body 2 to prevent tilting and scratching the assembled splines. The handle 106 is located on the surface of the shaft body 2. At this time, the handle 106 is located on one side of the support plate 301. Continue to pull the handle 106 so that the inner spline end of the spline shaft body 2 passes through one side of the sliding bearing 304 and the oil seal 302, and at the same time, the outer side of the rotating shaft end of the spline shaft body 2 is inserted into the inner side of the sliding bearing 304. At the same time, the outer side of the rotating shaft of the spline shaft body 2 is attached to the inner side wall of the oil seal 302. At this time, the spline shaft body 2 and the support plate 301 are installed. Pull the handle 106 to one side to remove the protective tooling body 1. At this time, the assembly process of the spline shaft body 2 is completed. The handle 106 facilitates the taking and use of the spline shaft body 2 during installation.

[0034] In order to avoid the problem that the outer diameter of the spline shaft body 2 is larger than the inner diameter of the oil seal 302 during installation, so that the surface of the spline shaft body 2 is easily scratched when installing the assembly parts, the spline shaft body 2 can be easily installed on the inner side of the oil seal 302 and the sliding bearing 304 of the installation component 3 by protecting the tooling body 1, and the problem of assembly difficulty caused by the extremely small gap between the spline shaft body 2 and the oil seal 302 and the sliding bearing 304 is effectively solved.

[0035] In summary, the protective tool body 1 can effectively prevent the outer surface of the oil seal 302 from being scratched when the spline shaft body 2 is installed on the inner side of the sliding bearing 304 and the oil seal 302 of the support plate 301. Under the action of the fillet 103 and the claw 104, it is ensured that the oil seal 302 will not be damaged by the sharp edge during the installation process.

[0036] At the same time, the claw 104 cooperates with the inner spline groove of the spline shaft body 2, so that the protection tool body 1 and the spline shaft body 2 can be kept on the same axis, thereby greatly improving the stability of the installation;

[0037] The handle 106 makes it easier to take and use the spline shaft body 2 during installation. After installation, the protective tool body 1 can be easily removed from the sliding bearing 304 and the oil seal 302, thereby improving work efficiency.

[0038] Under the action of the frustum 101 and the cylinder 102, the frustum 101 gradually expands the diameter of the oil seal 302 of the protective tool body 1, so that the spline shaft body 2 and the support plate 301 are always in a vertical state during installation, and the spline shaft body 2 will not be skewed during installation, causing scratches on the surface of the spline shaft body 2. The problem of assembly difficulty caused by the extremely small gap between the spline shaft body 2 and the oil seal 302 and the sliding bearing 304 is solved, making the assembly process smoother and improving the accuracy and success rate of assembly.

[0039] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A convenient-to-use spline shaft protection tool, comprising a protection tool body (1), characterized in that: One side of the protective tool body (1) is connected to a spline shaft body (2), and the other side of the protective tool body (1) is provided with a mounting assembly (3) for connecting to the spline shaft body (2); A truncated cone (101) is provided on one side of the protective tool body (1), a cylinder (102) is integrally formed on one side of the truncated cone (101), a plurality of claws (104) are integrally formed on one side of the cylinder (102), a limiting groove (109) is provided between the plurality of claws (104), an insertion groove (105) is provided between adjacent claws (104), a rounded corner (103) is provided at one end of the claws (104), a handle (106) is integrally formed on the other side of the truncated cone (101), and a protective frame (108) is integrally formed on one side of the handle (106).

2. A convenient-to-use spline shaft protection tool as claimed in claim 1, characterized in that: The truncated cone (101), the handle (106) and the protective frame (108) are all provided with ventilation holes (107) inside, and the ventilation holes (107) are connected to the limiting groove (109).

3. The convenient-to-use spline shaft protection tool according to claim 2, characterized in that: The spline end of the spline shaft body (2) is inserted into the inner side of a plurality of the insertion grooves (105), and one side of the claw (104) is located outside the spline end of the spline shaft body (2).

4. The convenient-to-use spline shaft protection tool according to claim 3, characterized in that: One end of the small-diameter bottom surface of the truncated cone (101) is located on one side of the handle (106), and one end of the large-diameter bottom surface of the truncated cone (101) is located on one side of the cylinder (102).

5. The convenient-to-use spline shaft protection tool according to claim 1, characterized in that: The mounting assembly (3) comprises a support plate (301), a through hole (303) is provided on one side of the support plate (301), and a sliding bearing (304) and an oil seal (302) are respectively installed on the inner wall of the through hole (303).

6. The convenient-to-use spline shaft protection tool according to claim 5, characterized in that: The sliding bearing (304) is located on the left side of the oil seal (302), and the outer side of the truncated cone (101) is inserted into the inner side of the sliding bearing (304) and the oil seal (302) in sequence.

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