A tool for automatically injecting grease into a transmission shaft with a spline shaft fork

Abstract

The utility model discloses a tool for automatically injecting grease into a transmission shaft with a spline shaft fork, and relates to the field of tooling for automatically injecting grease into a transmission shaft with a spline shaft fork, including a modified spline sleeve, a spline sleeve base, and a spline shaft fork. The modified spline sleeve is used to be inserted into a positioning groove provided at the top of the spline sleeve base and fixed, so that the inner spline of the modified spline sleeve faces upward, so as to cooperate with the spline shaft fork; an oil injection groove is provided along the circumferential direction of the inner spline of the modified spline sleeve, and an oil injection quick air pipe joint connected to the oil injection groove is installed on the outer wall of the modified spline sleeve, which is used to inject lubricating grease into the oil injection groove. The utility model realizes the rapid and uniform injection of lubricating grease into the spline shaft fork and can be quantitative, and can store a certain amount of spare grease at the polished rod to increase the service life of the sliding pair.

Description

Technical Field

[0001] The utility model relates to the field of transmission shaft assembly, in particular to a tool for automatically injecting grease on a transmission shaft with a spline shaft fork. Background Art

[0002] like Figure 1 As shown, in the telescopic structure of the sliding pair of the transmission shaft assembly, there is a combination of a spline shaft fork A (1') and a spline sleeve (2'). This structure is often seen in the connection of multi-section transmission shafts. It is obvious that the spline shaft fork and the spline sleeve sliding pair need to be filled with lubricating grease to ensure smooth sliding and increase wear life. At present, in production, a brush is often used to apply grease to the outer surface of the spline shaft fork.

[0003] However, when using a brush to apply grease to the periphery of the spline shaft fork, due to the large number of spline teeth and the uneven ridges on the periphery, the brushing method has the problem of uneven application; when brushing needs to be relatively uniform, it takes a long time and is inefficient; when brushing, the amount varies and cannot be accurately quantified. If too little is applied, the sliding pair may wear out and fail early, and too much is applied, resulting in a waste of grease. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a tool for automatically greasing a spline shaft fork transmission shaft, so as to achieve rapid, uniform and quantitative filling of the spline shaft fork lubricating grease, and to store a certain amount of spare grease at the polished rod to increase the service life of the sliding pair.

[0005] The purpose of the utility model is achieved through the following technical solutions: this kind of tooling for automatically greasing a transmission shaft with a spline shaft fork comprises a modified spline sleeve, a spline sleeve base and a spline shaft fork, wherein the modified spline sleeve is used to be placed in a positioning groove provided at the top of the spline sleeve base and fixed so that the inner splines of the modified spline sleeve face upwards, thereby fitting into the spline shaft fork; an oil filling groove is provided along the circumferential direction of the inner splines of the modified spline sleeve, and an oil filling quick air pipe joint connected to the oil filling groove is installed on the outer wall of the modified spline sleeve for injecting lubricating grease into the oil filling groove.

[0006] As a further technical solution, the spline shaft fork includes a polished rod portion and a spline portion located at the lower end of the polished rod portion. When the spline shaft fork is installed in the modified spline sleeve, the oil filling groove is located outside the spline portion and close to one side of the polished rod portion.

[0007] As a further technical solution, the oil filling groove is located at 1 / 3 of the total height of the spline part.

[0008] As a further technical solution, an exhaust hole is provided at the lower part of the modified spline sleeve to connect the inner cavity of the modified spline sleeve with the outside.

[0009] As a further technical solution, a hole is opened on the side wall of the spline sleeve base and is connected to the positioning groove, which is used to install fixing screws to lock and fix the modified spline sleeve to the spline sleeve base.

[0010] As a further technical solution, the oil injection quick air pipe joint is externally connected to a quantitative oil injection pump.

[0011] The beneficial effects of the utility model are:

[0012] 1. Use the spline sleeve of the sliding pair to directly transform it into tooling, saving tooling production costs;

[0013] 2. An annular groove is provided on the inner spline of the modified spline sleeve to realize the axial upward and downward movement when grease is added, so as to achieve the purpose of uniform oil filling;

[0014] 3. The oil injection position is cleverly designed at 1 / 3 of the spline part, that is, the oil injection is closer to the polished rod part, so that the purpose of storing grease in the polished rod part can be achieved;

[0015] 4. The exhaust hole of the spline sleeve is conducive to the smooth removal of the spline shaft fork after the oil filling is completed, ensuring that no negative air pressure is formed at the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of the structure of the spline sleeve and the spline shaft fork during assembly in the prior art.

[0017] Figure 2 It is a structural schematic diagram of the utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the utility model when injecting grease.

[0019] Explanation of the reference numerals: modified spline sleeve 1, internal spline 1-1, oil filling groove 2, oil filling quick air pipe joint 3, exhaust hole 4, fixing screw 5, spline sleeve base 6, positioning groove 6-1, spline shaft fork 7, bare rod part 7-1, spline part 7-2. DETAILED DESCRIPTION

[0020] The utility model will be described in detail below with reference to the accompanying drawings:

[0021] Example: As shown in the attached Figure 2 , 3 As shown, the automatic grease injection tooling for the transmission shaft with a spline shaft fork includes a modified spline sleeve 1, an inner spline 1-1, an oil injection groove 2, an oil injection quick air pipe joint 3, an exhaust hole 4, a fixing screw 5, a spline sleeve base 6, a positioning groove 6-1, a spline shaft fork 7, a bare rod portion 7-1 and a spline portion 7-2.

[0022] Reference Figure 2A positioning groove 6-1 is formed on the top of the spline sleeve base 6, and a through hole is formed on the side wall of the spline sleeve base 6. The through hole is connected to the positioning groove 6-1. The internal spline 1-1 of the modified spline sleeve 1 is placed upward into the positioning groove 6-1, and then the fixing screw 5 is passed through the through hole to lock and fix the modified spline sleeve 1 and the spline sleeve base 6. Figure 3 As shown, the spline shaft fork 7 is then installed in conjunction with the modified spline sleeve 1. Further, an annular oil filling groove 2 is opened along the circumferential direction of the inner spline 1-1 of the modified spline sleeve 1, a hole is opened at a position corresponding to the oil filling groove 2 on the outer wall of the modified spline sleeve 1, and an oil filling quick air pipe joint 3 connected to the oil filling groove 2 is installed. The oil filling quick air pipe joint 3 is externally connected to a quantitative oil filling pump, so as to quantitatively inject lubricating grease into the oil filling groove 2.

[0023] like Figure 3 As shown, the spline shaft fork 7 includes a polished rod portion 7-1 and a spline portion 7-2 located at the lower end of the polished rod portion 7-1. When the spline shaft fork 7 is installed in the modified spline sleeve 1, the oil filling groove 2 is located outside the spline portion 7-2 and close to the side of the polished rod portion 7-1. Preferably, the oil filling groove 2 is located at 1 / 3 of the total height of the spline portion 7-2. In addition, an exhaust hole 4 is opened at the lower part of the modified spline sleeve 1 to connect the inner cavity of the modified spline sleeve 1 with the outside. When the spline portion 7-2 of the spline shaft fork 7 is filled with grease, when the spline shaft fork 7 is pulled out, no negative air pressure will be formed at the bottom, which is conducive to pulling out.

[0024] The modified spline sleeve 1 is modified based on the spline sleeve paired with the sliding pair of the spline shaft fork of the transmission shaft, which saves the cost of tooling production. The spline inside the spline sleeve has a circular oil filling groove 2 of the spline sleeve. This structure helps to allow the lubricating grease to move upward and downward along the spline axis after the lubricating grease is injected, thereby covering the spline portion 7-2 of the spline shaft fork 7. The height of the circular oil filling groove 2 of the spline sleeve is designed to be about 1 / 3 above the spline portion 7-2 of the spline shaft fork 7 during oil filling. The distance traveled by the grease is different, which is conducive to storing more oil at the spline shaft bare rod 7-1. There is a spline sleeve oil filling quick air pipe connector 3 on the side of the circular oil filling groove 2 of the spline sleeve to facilitate the entry of high-pressure grease.

[0025] The working process of this utility model:

[0026] Before oiling, first face the inner spline 1-1 of the modified spline sleeve 1 upward and place it in the positioning groove 6-1, then use the fixing screw 5 to pass through the through hole to lock and fix the modified spline sleeve 1 and the spline sleeve base 6. When oiling, first align the spline shaft fork 7 with the inner spline 1-1 of the spline sleeve modified tooling 1 and insert it to the bottom. At this time, start the quantitative oil filling pump switch, and the high-pressure lubricating grease enters the circular oil filling groove 2 of the spline sleeve along the spline sleeve oil filling quick air pipe joint 3. After filling the oil groove, the grease moves upward and downward along the vertical direction of the spline gap, and then covers the spline part 7-2 of the spline shaft fork 7 with grease. Part of the grease will accumulate in the light rod part 7-1. After the quantitative grease is injected, pull out the spline shaft fork 7. During the upward pulling process, the lower part of the spline part 7-2 will be covered by the residual grease in the tooling, so as to achieve the purpose of uniform and quantitative oiling.

[0027] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A tool for automatically injecting grease into a transmission shaft with a spline shaft fork, characterized in that: The invention comprises a modified spline sleeve (1), a spline sleeve base (6) and a spline shaft fork (7); the modified spline sleeve (1) is used to be placed in a positioning groove (6-1) provided at the top of the spline sleeve base (6) and fixed, so that the inner spline (1-1) of the modified spline sleeve (1) faces upward, thereby fitting into the spline shaft fork (7); an oil injection groove (2) is provided along the circumferential direction of the inner spline (1-1) of the modified spline sleeve (1); an oil injection quick air pipe joint (3) connected to the oil injection groove (2) is installed on the outer wall of the modified spline sleeve (1) and is used to inject lubricating grease into the oil injection groove (2).

2. The tooling for automatically injecting grease into a transmission shaft with a spline shaft fork according to claim 1 is characterized in that: The spline shaft fork (7) comprises a polished rod portion (7-1) and a spline portion (7-2) located at the lower end of the polished rod portion (7-1). When the spline shaft fork (7) is installed in the modified spline sleeve (1), the oil filling groove (2) is located outside the spline portion (7-2) and on a side close to the polished rod portion (7-1).

3. The tooling for automatically injecting grease into a transmission shaft with a spline shaft fork according to claim 2 is characterized in that: The oil injection groove (2) is located at 1 / 3 of the total height of the spline part (7-2).

4. The tooling for automatically injecting grease into a transmission shaft with a spline shaft fork according to claim 1 is characterized in that: The lower part of the modified spline sleeve (1) is provided with an exhaust hole (4) to connect the inner cavity of the modified spline sleeve (1) with the outside.

5. The tooling for automatically injecting grease into a transmission shaft with a spline shaft fork according to claim 1 is characterized in that: A hole is opened on the side wall of the spline sleeve base (6) and is communicated with the positioning groove (6-1) for installing a fixing screw (5) to lock and fix the modified spline sleeve (1) and the spline sleeve base (6).

6. The tooling for automatically injecting grease into a transmission shaft with a spline shaft fork according to claim 1 is characterized in that: The oil injection quick air pipe joint (3) is externally connected to a quantitative oil injection pump.

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