Special-shaped transmission pipe

Abstract

The utility model belongs to the technical field of transmission pipes, and particularly relates to a special-shaped transmission pipe which comprises a shaft body, the shaft body is composed of an outer shaft body and an inner shaft body connected in the outer shaft body, a transmission space is formed between the inner shaft body and the outer shaft body, and a dust cover assembly comprises an inner cover pipe arranged on the outer side of the outer shaft body in a sleeved mode and an outer cover pipe arranged on the outer side of the inner cover pipe in a sleeved mode. The dustproof cover is arranged on the side, opposite to the outer cover pipe, of the inner cover pipe, dust can be effectively prevented from entering the transmission space, the oil injection groove is formed in the inner cover pipe and the outer cover pipe in a penetrating mode so that oil can be conveniently injected into the transmission space for lubrication, an oil through hole is formed in the position, opposite to the oil injection groove, of the outer shaft body, and the oil injection ring is arranged on the outer surface of the outer shaft body. And the oil passing hole is provided with an oil sealing plug, so that the lubricating oil can smoothly enter the transmission space, and the oil passing hole is provided with the oil sealing plug to prevent the lubricating oil from leaking.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission pipes, and in particular relates to a special-shaped transmission pipe. Background Art

[0002] The transmission tube is an important component for transmitting power in the automobile transmission system. The shaft body of the existing transmission tube is usually composed of an inner and outer shaft body in a sleeved manner, that is, an outer spline is provided on the inner shaft body, and an inner spline matching the outer spline of the inner shaft body is provided on the outer shaft body. The outer spline and the inner spline are slidably matched, so that the shaft body can achieve relative sliding to achieve the length adjustment of the shaft body while realizing the transmission power; however, during the transmission process, the stress on the spline grooves of the two shaft bodies is relatively large, and the friction force generated is also large. In addition, the inner and outer shaft bodies are splined, and the length is also adjusted while the shaft body is transmitting. Therefore, the friction force between the inner and outer shaft bodies in this process is very large. The friction generated by long-term work will cause the spline to wear and produce gaps. Once the mating splines have gaps, it will affect the performance of the entire transmission system. Therefore, sufficient lubrication is needed between the inner and outer shafts to reduce friction. When the existing transmission shaft structure is filled with lubricating oil between the inner and outer shafts, the dust cover structure outside the shaft body must be removed, and the inner and outer shaft bodies must also be separated. The method of filling lubricating oil is so troublesome that the number of times the lubricating oil is filled will be reduced or even abandoned, which will reduce the transmission performance and service life of the transmission pipe. At the same time, the dustproof performance of the existing transmission pipe is weak, and dust can easily enter and affect the transmission effect. Utility Model Content

[0003] The utility model aims to solve the above-mentioned technical problems and provide a special-shaped transmission pipe, which achieves the effect of simple oil injection.

[0004] In view of this, the utility model provides a special-shaped transmission tube, the shaft body includes an outer shaft body and an inner shaft body connected to the outer shaft body, the dust cover assembly includes an inner cover tube sleeved on the outside of the outer shaft body and an outer cover tube sleeved on the outside of the inner cover tube, a dust cover is provided on the side of the inner cover tube opposite to the outer cover tube, an oil filling groove is provided through the inner cover tube and the outer cover tube, an oil through hole is provided on the outer shaft body at a position opposite to the oil filling groove, an oil filling ring is provided on the outer surface of the outer shaft body and corresponds to the position of the oil filling groove, and an oil sealing plug is provided on the oil through hole.

[0005] In the above technical solution, further, the dust cover includes a mounting portion, a plurality of alternately arranged crest structures and trough structures, and a connecting portion, a plurality of connecting grooves are provided at the opposite ends of the inner cover tube and the outer cover tube, a plurality of mounting grooves matching the connecting grooves are provided on the outer side of the mounting portion, a clamping block is provided on the mounting groove, and a spring is provided between the clamping block and the bottom wall of the mounting groove.

[0006] In the above technical solution, further, the crest structure includes a large diameter end crest surface and a small diameter end crest surface, and at least one line is provided on the large diameter end crest, and the lines are arranged circumferentially along the large diameter end crest surface.

[0007] In the above technical solution, further, the cross section of the outer shaft body includes a plurality of petal-shaped protrusions evenly arranged in an annular direction, the thickness of the outer shaft body is uniform, the outer wall of the inner shaft body and the inner wall of the outer shaft body have the same shape, and there is a gap between the two.

[0008] In the above technical solution, further, a special-shaped inner hole is provided on the inner shaft body.

[0009] In the above technical solution, further, the cross-sectional shape of the irregular inner hole includes a two-convex shape, a three-convex shape, and a six-petal plum blossom shape.

[0010] In the above technical solution, further, the outer shaft body and the inner shaft body are made by a cold drawing process.

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

[0012] 1. When the length between the outer shaft body and the inner shaft body is adjusted, the added lubricating oil will be driven by the sliding between the inner and outer shaft bodies, thereby achieving better lubrication.

[0013] 2. The dust cover assembly includes an inner cover tube sleeved on the outside of the outer shaft body and an outer cover tube sleeved on the outside of the inner cover tube. A dust cover is provided on the side opposite to the inner cover tube, which can effectively prevent dust from entering the transmission space.

[0014] 3. The outer shaft body and the inner shaft body are made by cold drawing process, so that the outer shaft body and the inner shaft body have excellent mechanical properties and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is an exploded diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the oil filling ring and the oil sealing plug of the utility model;

[0018] Figure 4 It is a cross-sectional view of the structure of the dust cover assembly of the utility model;

[0019] Figure 5 It is a schematic diagram of the structure of the dust cover of the utility model;

[0020] Figure 6 It is a cross-sectional view of the inner and outer shafts of the utility model;

[0021] Markings in the figure are: 1-outer shaft body, 2-inner shaft body, 3-inner cover tube, 4-outer cover tube, 5-oil filling groove, 6-oil through hole, 7-oil filling ring, 8-oil sealing plug, 9-dust cover, 10-mounting part, 11-peak structure, 12-trough structure, 13-connecting part, 14-connecting groove, 15-mounting groove, 16-clamping block, 17-spring, 18-peak surface of large diameter end, 19-peak surface of small diameter end, 20-texture, 21-petal-shaped protrusion, 22-special-shaped inner hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0023] Embodiment 1:

[0024] This embodiment provides a special-shaped transmission tube, including:

[0025] The shaft body comprises an outer shaft body 1 and an inner shaft body 2 connected to the outer shaft body 1;

[0026] A dust cover assembly, the dust cover assembly comprises an inner cover tube 3 sleeved on the outer side of the outer shaft body 1 and an outer cover tube 4 sleeved on the outer side of the inner cover tube 3, and a dust cover 9 is provided on the side opposite to the inner cover tube 3 and the outer cover tube 4;

[0027] An oil filling groove 5 is provided through the inner cover tube 3 and the outer cover tube 4;

[0028] An oil hole 6 is provided on the outer shaft body 1 at a position opposite to the oil filling groove 5;

[0029] An oil filling ring 7, which is arranged on the outer surface of the outer shaft body 1 and corresponds to the position of the oil filling groove 5;

[0030] An oil sealing plug 8 is provided on the oil through hole 6 .

[0031] It can be seen from the present embodiment that the shaft body is composed of an outer shaft body 1 and an inner shaft body 2 connected to the outer shaft body 1, and a transmission space is formed between the inner and outer shaft bodies. The dust cover assembly includes an inner cover tube 3 sleeved on the outside of the outer shaft body 1 and an outer cover tube 4 sleeved on the outside of the inner cover tube 3. A dust cover 9 is arranged on the side of the inner cover tube 3 opposite to the outer cover tube 4, which can effectively prevent dust from entering the transmission space. An oil filling groove 5 is arranged through the inner cover tube 3 and the outer cover tube 4 to facilitate oil filling and lubrication into the transmission space. An oil through hole 6 is arranged at a position opposite to the oil filling groove 5 on the outer shaft body 1. An oil filling ring 7 is arranged on the outer surface of the outer shaft body 1 and corresponds to the position of the oil filling groove 5, so that the lubricating oil can smoothly enter the transmission space. An oil sealing plug 8 is arranged on the oil through hole 6 to prevent the lubricating oil from leaking. When the length between the outer shaft body 1 and the inner shaft body 2 is adjusted, the added lubricating oil will be driven by the sliding between the inner and outer shaft bodies, thereby achieving better lubrication.

[0032] Embodiment 2:

[0033] This embodiment provides a special-shaped transmission tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0034] The dust cover 9 includes a mounting portion 10, a plurality of alternately arranged wave crest structures 11 and wave trough structures 12, and a connecting portion 13. A plurality of connecting grooves 14 are provided at the opposite ends of the inner cover tube 3 and the outer cover tube 4. A plurality of mounting grooves 15 matching the connecting grooves 14 are provided on the outer side of the mounting portion 10. A clamping block 16 is provided on the mounting groove 15, and a spring 17 is provided between the clamping block 16 and the bottom wall of the mounting groove 15.

[0035] It can be seen from the present embodiment that, during installation, the clamping block 16 is pressed to squeeze the spring 17, and then the connecting portion 13 is installed into the outer cover tube 4 or the inner cover tube 3. When it is moved to the corresponding position of the connecting groove 14 and the installation groove 15, the clamping block 16 is released, and the clamping block 16 is clamped on the connecting groove 14 by the complex force of the spring 17, so as to realize the fixed connection between the dust cover 9 and the outer cover tube 4 or the inner cover tube 3. During disassembly, it is only necessary to press the clamping block 16 and then remove the outer cover tube 4 or the inner cover tube 3 to complete the disassembly.

[0036] Embodiment 3:

[0037] This embodiment provides a special-shaped transmission tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0038] The wave crest structure 11 includes a large diameter end wave crest surface 18 and a small diameter end wave crest surface 19 , and at least one line 20 is disposed on the large diameter end wave crest surface 18 , and the lines 20 are arranged circumferentially along the large diameter end wave crest surface 18 .

[0039] It can be seen from the present embodiment that the crest structure 11 includes a large diameter end crest surface 18 and a small diameter end crest surface 19, and at least one groove 20 is provided on the large diameter end crest surface 18, and the groove 20 is arranged circumferentially along the large diameter end crest surface 18. The provision of the groove 20 can not only increase the strength of the dust cover 9, effectively prevent the adhesion of dust, but also improve the drainage effect.

[0040] Embodiment 4:

[0041] This embodiment provides a special-shaped transmission tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0042] The cross section of the outer shaft body 1 includes a plurality of petal-shaped protrusions 21 evenly arranged in an annular direction. The thickness of the outer shaft body 1 is uniform. The outer wall of the inner shaft body 2 has the same shape as the inner wall of the outer shaft body 1 , and there is a gap between the two.

[0043] It can be seen from the present embodiment that the cross-section of the outer shaft body 1 includes a plurality of petal-shaped protrusions 21 that are evenly arranged in an annular direction, the thickness of the outer shaft body 1 is uniform, the outer wall of the inner shaft body 2 is of the same shape as the inner wall of the outer shaft body 1, and there is a gap between the two. This design not only ensures that the adjustment of the length between the inner and outer shaft bodies will not be affected, but also enables the lubricating oil to be evenly distributed in the transmission space, thereby improving the lubrication effect.

[0044] Embodiment 5:

[0045] This embodiment provides a special-shaped transmission tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0046] The inner shaft body 2 is provided with a special-shaped inner hole 22 .

[0047] It can be seen from this embodiment that a special-shaped inner hole 22 is formed on the inner shaft body 2 .

[0048] Embodiment 6:

[0049] This embodiment provides a special-shaped transmission tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] The cross-sectional shapes of the special-shaped inner hole 22 include a two-convex shape, a three-convex shape, and a six-petal plum blossom shape.

[0051] It can be seen from the present embodiment that the cross-sectional shapes of the special-shaped inner hole 22 include two-convex shape, three-convex shape, six-petal plum blossom shape, etc. The design of such special-shaped inner hole 22 can be selected according to actual needs to meet different transmission requirements.

[0052] Embodiment 7:

[0053] This embodiment provides a special-shaped transmission tube, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0054] The outer shaft body 1 and the inner shaft body 2 are made by a cold drawing process.

[0055] It can be seen from this embodiment that the outer shaft body 1 and the inner shaft body 2 are made by a cold drawing process, so that the outer shaft body 1 and the inner shaft body 2 have excellent mechanical properties and wear resistance.

[0056] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A special-shaped transmission tube, characterized in that: include: A shaft body, the shaft body comprising an outer shaft body (1) and an inner shaft body (2) connected to the outer shaft body (1); A dust cover assembly, the dust cover assembly comprising an inner cover tube (3) sleeved on the outside of the outer shaft body (1) and an outer cover tube (4) sleeved on the outside of the inner cover tube (3), a dust cover (9) being arranged on the side of the inner cover tube (3) opposite to the outer cover tube (4); An oil injection groove (5), the oil injection groove (5) is provided through the inner cover tube (3) and the outer cover tube (4); An oil hole (6), wherein the outer shaft body (1) is provided with an oil hole (6) at a position opposite to the oil filling groove (5); An oil filling ring (7), wherein the oil filling ring (7) is arranged on the outer surface of the outer shaft body (1) and corresponds to the position of the oil filling groove (5); An oil sealing plug (8), wherein the oil through hole (6) is provided with an oil sealing plug (8).

2. A special-shaped transmission tube according to claim 1, characterized in that: The dust cover (9) comprises a mounting portion (10), a plurality of alternately arranged wave crest structures (11) and wave trough structures (12), and a connecting portion (13); a plurality of connecting grooves (14) are provided at the ends of the inner cover tube (3) and the outer cover tube (4) opposite to each other; a plurality of mounting grooves (15) matching the connecting grooves (14) are provided on the outer side of the mounting portion (10); a clamping block (16) is provided on the mounting groove (15); and a spring (17) is provided between the clamping block (16) and the bottom wall of the mounting groove (15).

3. A special-shaped transmission tube according to claim 2, characterized in that: The wave crest structure (11) comprises a large-diameter end wave crest surface (18) and a small-diameter end wave crest surface (19), and at least one grain (20) is provided on the large-diameter end wave crest surface (18), and the grain (20) is arranged along the circumference of the large-diameter end wave crest surface (18).

4. The special-shaped transmission tube according to claim 3, characterized in that: The cross section of the outer shaft body (1) comprises a plurality of petal-shaped protrusions (21) evenly arranged in an annular direction, the thickness of the outer shaft body (1) is uniform, the outer wall of the inner shaft body (2) is of the same shape as the inner wall of the outer shaft body (1), and there is a gap between the two.

5. The special-shaped transmission tube according to claim 4, characterized in that: The inner shaft body (2) is provided with a special-shaped inner hole (22).

6. The special-shaped transmission tube according to claim 5, characterized in that: The cross-sectional shapes of the special-shaped inner hole (22) include a two-convex shape, a three-convex shape, and a six-petal plum blossom shape.

7. The special-shaped transmission tube according to claim 6, characterized in that: The outer shaft body (1) and the inner shaft body (2) are manufactured through a cold drawing process.

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