Mechanism for installing transmission oil seal

Abstract

The invention relates to the technical field of transmission assembly, and aims to solve the technical problem of damage to an inner lip of an oil seal. In order to solve the technical problem, the invention provides the mechanism for mounting the transmission oil seal. The device is characterized in that a guide ring of an oil seal mounting frame is connected above an oil seal mounting sleeve through a middle connecting piece; the oil seal installation sleeve comprises a circular ring body and a sleeve connected to the bottom of the circular ring body. The inner diameter of the circular ring body is equal to that of the sleeve. The outer diameter of the circular ring body is larger than that of the sleeve. An oil seal push-out ring of the oil seal push ring is sleeved outside the sleeve, and a gap is formed between the oil seal push-out ring and the sleeve; the sliding connecting piece is in sliding connection with the guide ring and the oil seal installation sleeve and used for driving the oil seal to move in the axial direction. The inner diameter of the oil seal push-out ring is larger than the inner diameter of the oil seal and smaller than the outer diameter of the oil seal. The oil seal push-out ring abuts against the upper surface of the oil seal. The sliding connecting piece moves downwards and is used for driving the oil seal to move downwards to be installed on the to-be-installed shaft section. The oil seal is not damaged.

Description

Technical Field

[0001] The invention relates to the technical field of transmission assembly, in particular to a transmission oil seal installation mechanism. Background Art

[0002] The oil seal is a precision mechanical component that prevents the lubricating oil from leaking inside the transmission system. In the assembly process of the gearbox, the oil seal needs to be installed on the oil seal installation shaft (the oil seal installation shaft includes a spline shaft section and a shaft section to be installed connected to the spline shaft section, and the spline shaft section and the shaft section to be installed have a shaft shoulder at the connection position). The installation of the oil seal is a key step, especially the oil seal lip must not have any impurities, foreign matter and damage during the installation process, otherwise it is very easy to cause the assembly to leak lubricating oil.

[0003] In the production process of commercial vehicle transmissions, most oil seals need to be installed through the shaft section of the oil seal installation shaft, especially the spline shaft section, and then installed on the shaft section to be installed. The existing technology uses manual installation of oil seals. During the manual installation process, most of them still rely on the experience of assembly workers or the protection layer on the shaft head to protect the oil seal. It is difficult to completely avoid the oil seal from being skewed or scratched, which in turn causes damage to the inner lip of the oil seal, affecting normal functionality, and the operation is difficult to control. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides a transmission oil seal installation mechanism, comprising: The oil seal mounting frame comprises a guide ring, an oil seal mounting sleeve and an intermediate connecting piece; the guide ring is connected to the upper part of the oil seal mounting sleeve through the intermediate connecting piece; the oil seal mounting sleeve comprises a circular ring body and a sleeve connected to the bottom of the circular ring body; the inner diameters of the circular ring body and the sleeve are equal, and the outer diameter of the circular ring body is greater than the outer diameter of the sleeve; The oil seal push ring comprises an oil seal push ring and a sliding connection piece connected to the top of the oil seal push ring, the oil seal push ring is sleeved on the outside of the sleeve, and there is a gap between the oil seal push ring and the sleeve; the sliding connection piece is slidably connected with the guide ring and the oil seal mounting sleeve, and is used to drive the oil seal to move along its axial direction; the inner diameter of the oil seal push ring is larger than the inner diameter of the oil seal and smaller than the outer diameter of the oil seal; The oil seal push-out ring abuts against the upper surface of the oil seal; the sliding connection moves downward to drive the oil seal to move downward and be installed on the shaft section to be installed.

[0006] In one embodiment of the present invention, the inner diameter of the sleeve is smaller than the outer diameter of the shaft segment to be installed, and larger than the outer diameter of the spline shaft segment.

[0007] In one embodiment of the present invention, one end of the sleeve away from the circular ring body is chamfered, and the chamfered edges are rounded.

[0008] In one embodiment of the present invention, the sliding connection member includes a plurality of vertically extending columns; the bottom ends of the plurality of columns are respectively fixedly connected to the oil seal ejection rings, and the top ends are connected to each other; the guide ring and the oil seal mounting sleeve are respectively provided with sliding connection holes that cooperate with the columns, and the columns and the sliding connection holes constitute a sliding pair.

[0009] In one embodiment of the present invention, a bushing is provided in the sliding connection hole.

[0010] In one embodiment of the present invention, at least two columns are connected to each other via a connecting plate, and the columns extend above the guide ring and are fixedly connected to the connecting plate.

[0011] In one embodiment of the present invention, the column and the connecting plate are fixedly connected by fastening bolts.

[0012] In one embodiment of the present invention, the wall thickness of the sleeve is 0.5 mm to 1.5 mm, the outer wall of the sleeve is ground, and the roughness of the outer wall of the sleeve is Ra0.4.

[0013] In one embodiment of the present invention, cold welding is used at the connection position between the oil seal push-out ring and the sliding connection member.

[0014] In one embodiment of the present invention, the guide ring and the intermediate connecting member are fixed at the connecting position by cold welding.

[0015] In one embodiment of the present invention, the connection position between the annular body and the intermediate connecting piece is fixed by cold welding.

[0016] In one embodiment of the present invention, the oil seal mounting frame is subjected to quenching and tempering treatment, and the hardness is HRC32-36, and the surface of the oil seal mounting frame is hard chrome plated.

[0017] In one embodiment of the present invention, the oil seal push ring is subjected to quenching and tempering treatment, and the hardness is HRC32-36, and the surface of the oil seal push ring is hard chrome plated.

[0018] In one embodiment of the present invention, the oil seal mounting frame is subjected to quenching and tempering treatment, and the hardness is HRC32~36, and the surface of the oil seal mounting frame is plated with hard chrome; the oil seal push ring is subjected to quenching and tempering treatment, and the hardness is HRC32~36, and the surface of the oil seal push ring is plated with hard chrome.

[0019] The above technical solution of the present invention has the following advantages compared with the prior art: The transmission oil seal installation mechanism described in the present invention only needs to put the oil seal on the sleeve, then put the device on the oil seal installation shaft, and use the driving oil seal push ring to move so that the oil seal is installed in place. The process of installing the oil seal using the present application is controllable, simple and easy to operate, and solves the installation problems of inconvenient traditional assembly methods and easy damage to parts; during installation, the inner lip of the oil seal and the spline shaft section are physically isolated by the sleeve of the present application, thereby effectively protecting the oil seal from damage when passing through the spline shaft section, solving the problem of easy damage to the inner lip of the oil seal when passing through the spline shaft section during installation. Secondly, when the present application is used to push the oil seal to move in its installation direction, the present application guides the oil seal to ensure that the oil seal will not be skewed during the installation process, effectively ensuring the functionality of the oil seal and greatly reducing the risk of product quality problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of a transmission oil seal installation mechanism in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of a transmission oil seal mounting mechanism; Figure 3 yes Figure 1 A schematic diagram of the structure of an oil seal mounting frame in a transmission oil seal mounting mechanism; Figure 4 yes Figure 3 The main view of Figure 5 yes Figure 4 Cross-sectional view at BB; Figure 6 yes Figure 4 A top view of Figure 7 yes Figure 6 Sectional view at AA; Figure 8 yes Figure 1 A schematic diagram of the structure of an oil seal push ring in a transmission oil seal installation mechanism; Fig. 9 yes Figure 8 The main view of Fig.10 yes Figure 8 A top view of Fig.11 is a schematic diagram of oil seal installation using this application; Description of the accompanying drawings in the specification: 100, oil seal mounting frame; 110, guide ring; 120, oil seal mounting sleeve; 121, circular ring body; 122, sleeve; 123, chamfer; 130, intermediate connecting piece; 140, sliding connecting hole; 200, oil seal push ring; 210, oil seal push ring; 220, sliding connector; 221, column; 222, connecting plate; 223, fastening bolt; 300, oil seal; 400, oil seal installation shaft; 410, spline shaft section; 420, shaft section to be installed. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] Reference Figure 1 to Figure 11 As shown, an embodiment of the present invention provides a transmission oil seal installation mechanism, comprising: The oil seal mounting frame 100 includes a guide ring 110, an oil seal mounting sleeve 120 and an intermediate connecting piece 130; the guide ring 110 is connected to the top of the oil seal mounting sleeve 120 through the intermediate connecting piece 130; the oil seal mounting sleeve 120 includes a circular ring body 121 and a sleeve 122 connected to the bottom of the circular ring body 121; the inner diameters of the circular ring body 121 and the sleeve 122 are equal, and the outer diameter of the circular ring body 121 is greater than the outer diameter of the sleeve 122; in some embodiments, the intermediate connecting piece 130 is a circular columnar structure. There can be two or more intermediate connecting pieces 130. The multiple intermediate connecting pieces 130 are symmetrically distributed along the center of the guide ring 110. When the oil seal 300 is installed, the oil seal mounting frame 100 is used to carry and protect the inner lip of the oil seal 300.

[0023] The oil seal push ring 200 includes an oil seal push ring 210 and a sliding connector 220 connected to the top of the oil seal push ring 210. The oil seal push ring 210 is sleeved on the outside of the sleeve 122, and there is a gap between the oil seal push ring 210 and the sleeve 122. The sliding connector 220 is staggered with the intermediate connector 130. The sliding connector 220 is slidably connected with the guide ring 110 and the oil seal mounting sleeve 120, and is used to drive the oil seal 300 to move along its axial direction. The inner diameter of the oil seal push ring 210 is larger than the inner diameter of the oil seal 300 and smaller than the outer diameter of the oil seal 300. The oil seal push-out ring 210 abuts against the upper surface of the oil seal 300 ; the sliding connector 220 moves downward to drive the oil seal 300 to move downward and be installed on the shaft segment 420 to be installed.

[0024] Specifically, in this embodiment, the sleeve 122 of the oil seal mounting frame 100 is used to fit the oil seal 300, and the oil seal push-out ring 210 is slidably connected to the oil seal mounting frame 100 through a sliding connection 220; in this way, when installing the oil seal 300, the guide ring 110 and the oil seal mounting sleeve 120 of the oil seal mounting frame 100 can be sleeved on the oil seal mounting shaft 400, and then the oil seal push-out ring 210 can be pushed to smoothly push the oil seal 300 to the pre-installation position of the shaft section 420 to be installed.

[0025] It can be seen that in this embodiment, it is only necessary to sleeve the oil seal 300 on the sleeve 122, and then sleeve the device on the oil seal installation shaft 400, and use the driving oil seal push ring 210 to move so that the oil seal 300 is installed in place. The process of installing the oil seal 300 using the present application is controllable, the operation is simple and easy to use, and the installation problem of the traditional assembly method being inconvenient and easy to damage the parts is solved; during installation, the inner lip of the oil seal 300 and the spline shaft section 410 are physically isolated by the sleeve 122 of the present application, thereby effectively protecting the oil seal 300 from damage when passing through the spline shaft section 410, and solving the problem that the inner lip of the oil seal 300 is easily damaged when passing through the spline shaft section 410 during installation. Secondly, when the present application is used to push the oil seal 300 to move in its installation direction, the present application guides the oil seal 300, thereby ensuring that the oil seal 300 will not be skewed during the installation process, effectively ensuring the functionality of the oil seal 300, and greatly reducing the risk of product quality problems.

[0026] Furthermore, the inner diameter of the sleeve 122 is smaller than the outer diameter of the shaft segment 420 to be installed, and larger than the outer diameter of the spline shaft segment 410. Specifically, when installing the oil seal 300 in this embodiment, the present application first passes through the spline shaft segment 410 until the present application reaches the shaft segment 420 to be installed, and the oil seal mounting frame 100 of the present application will be stuck at the shaft shoulder position between the spline shaft segment 410 and the shaft segment 420 to be installed, and then the oil seal 300 is pushed onto the shaft segment 420 to be installed. In this way, when pushing the oil seal 300, it can be ensured that the axis of the present application and the axis of the shaft segment 420 to be installed are always in a state of overlap, avoiding the oil seal 300 from being skewed when the oil seal 300 is pushed, thereby further ensuring that the oil seal 300 is smoothly installed on the shaft segment 420 to be installed. In addition, it can also avoid installation damage to other components.

[0027] Furthermore, one end of the sleeve 122 away from the annular body 121 is chamfered 123, and the edges of the chamfer 123 are rounded. Specifically, the present application facilitates the insertion of the oil seal 300 and can also avoid damage to the oil seal 300 when the oil seal 300 is inserted into the sleeve 122.

[0028] Furthermore, the sliding connection member 220 includes a plurality of vertically extending columns 221; the bottom ends of the plurality of columns 221 are respectively fixedly connected to the oil seal push-out ring 210, and the top ends are connected to each other; the guide ring 110 and the oil seal mounting sleeve 120 are respectively provided with sliding connection holes 140 that match the columns 221, and the columns 221 and the sliding connection holes 140 form a sliding pair. Specifically, the structure of this embodiment is simple.

[0029] Furthermore, a bushing (not shown in the figure) is provided in the sliding connection hole 140. Specifically, the bushing can guide the column 221 when the column 221 moves up and down, so that the column 221 runs more smoothly.

[0030] Furthermore, at least two columns 221 are connected to each other through a connecting plate 222, and the columns 221 extend above the guide ring 110 and are fixedly connected to the connecting plate 222. Specifically, in this embodiment, the connection and fixation between the columns 221 is achieved through the connecting plate 222, so that the spacing between the columns 221 can be ensured to remain unchanged. This prevents the change in the spacing between the columns 221 from affecting the sliding fit between the columns 221 and the sliding connection hole 140. In addition, the columns 221 and the oil seal ejection ring 210 can be manually driven to move up and down synchronously by holding the connecting plate 222, which has a simple structure, is convenient and quick to operate, and has a low manufacturing cost.

[0031] Furthermore, the column 221 and the connecting plate 222 are fixedly connected by fastening bolts 223. In some embodiments, the connecting plate 222 is a waist-shaped thin plate with holes, and a threaded hole is provided at the top of the column 221. The fastening bolts 223 pass through the hole of the connecting plate 222 and are threadedly connected to the threaded hole. Specifically, in this embodiment, the column 221 and the connecting plate 222 are connected and fixed by fastening bolts 223, which is convenient for installation and disassembly, and the connection is stable and reliable.

[0032] Furthermore, the wall thickness of the sleeve 122 is 0.5 mm to 1.5 mm, the outer wall of the sleeve 122 is ground, and the roughness of the outer wall of the sleeve 122 is Ra0.4.

[0033] Furthermore, cold welding is used at the connection position between the oil seal push ring 210 and the sliding connector 220. Since the connection position between the oil seal push ring 210 and the sliding connector 220 is prone to deformation, the two are cold welded and no obvious deformation is allowed; after welding, the weld trace is processed and no obvious sharp corners and protrusions are allowed, thereby reducing deformation at the connection position.

[0034] Furthermore, the guide ring 110 and the intermediate connector 130 are fixed by cold welding at the connection position. Furthermore, the annular body 121 and the intermediate connector 130 are fixed by cold welding at the connection position. Since the connection position of the guide ring 110 and the intermediate connector 130 and the connection position of the annular body 121 and the intermediate connector 130 are prone to deformation, they are fixed by cold welding process without obvious deformation; after welding, the weld mark is processed without obvious sharp corners and protrusions; thereby reducing the deformation at the connection position.

[0035] Further, the oil seal mounting frame 100 is subjected to quenching and tempering treatment, and the hardness is HRC32~36, and the surface of the oil seal mounting frame 100 is plated with hard chrome. In other embodiments, the oil seal push ring 200 is subjected to quenching and tempering treatment, and the hardness is HRC32~36, and the surface of the oil seal push ring 200 is plated with hard chrome. In other embodiments, the oil seal mounting frame 100 is subjected to quenching and tempering treatment, and the hardness is HRC32~36, and the surface of the oil seal mounting frame 100 is plated with hard chrome; the oil seal push ring 200 is subjected to quenching and tempering treatment, and the hardness is HRC32~36, and the surface of the oil seal push ring 200 is plated with hard chrome. Specifically, this embodiment ensures the hardness of the oil seal mounting frame 100 and / or the oil seal push ring 200.

[0036] When installing the oil seal 300, first install the oil seal 300 on the oil seal installation sleeve 120, then manually lift the connecting plate 222 to insert the present application into the oil seal installation shaft 400 until the oil seal installation sleeve 120 stops in front of the shaft section 420 to be installed. Then press the connecting plate 222 to make the oil seal push ring 210 slide into the shaft section 420 to be installed according to the installation direction of the oil seal 300, and at the same time, the oil seal push ring 200 will push the oil seal 300 to the pre-installation position, and lift the oil seal installation frame 100 to proceed to the next step of installing the oil seal 300.

[0037] This application does not cause the risk of secondary damage to the oil seal 300 due to misoperation, can effectively solve the problem of the inner lip being easily damaged by the shaft section when the oil seal 300 is installed, and reduces the risk of oil leakage of the transmission assembly caused by the installation process of the oil seal 300. At the same time, it can deal with the protection problem of the installation of the oil seal 300 in different situations, and has strong compatibility.

[0038] This application is applicable to all occasions where the oil seal 300 that meets the installation conditions is inserted into the corresponding shaft section. This application can protect the inner lip of the oil seal 300 from being scratched by burrs, splines or steps, and can effectively solve the problem of insufficient protection of the oil seal 300 during installation, thereby effectively avoiding the problem of oil leakage in the transmission.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A transmission oil seal installation mechanism, characterized in that: include: The oil seal mounting frame comprises a guide ring, an oil seal mounting sleeve and an intermediate connecting piece; the guide ring is connected to the upper part of the oil seal mounting sleeve through the intermediate connecting piece; the oil seal mounting sleeve comprises a circular ring body and a sleeve connected to the bottom of the circular ring body; the inner diameters of the circular ring body and the sleeve are equal, and the outer diameter of the circular ring body is greater than the outer diameter of the sleeve; An oil seal push ring, comprising an oil seal push ring and a sliding connection piece connected to the top of the oil seal push ring, the oil seal push ring is sleeved on the outside of the sleeve, and a gap is provided between the oil seal push ring and the sleeve; the sliding connection piece is slidably connected with the guide ring and the oil seal mounting sleeve, and is used to drive the oil seal to move along its axial direction; the inner diameter of the oil seal push ring is larger than the inner diameter of the oil seal and smaller than the outer diameter of the oil seal; Wherein, the oil seal push-out ring abuts against the upper surface of the oil seal; the sliding connection member moves downward to drive the oil seal to move downward and be installed on the shaft segment to be installed.

2. The transmission oil seal installation mechanism according to claim 1, characterized in that: The inner diameter of the sleeve is smaller than the outer diameter of the shaft segment to be installed, and larger than the outer diameter of the spline shaft segment.

3. The transmission oil seal installation mechanism according to claim 1, characterized in that: One end of the sleeve away from the circular ring body is chamfered, and the edges of the chamfer are rounded.

4. The transmission oil seal installation mechanism according to claim 1, characterized in that: The sliding connection member includes a plurality of vertically extending columns; the bottom ends of the plurality of columns are respectively fixedly connected to the oil seal ejection ring, and the top ends are connected to each other; the guide ring and the oil seal mounting sleeve are respectively provided with sliding connection holes that cooperate with the columns, and the columns and the sliding connection holes constitute a sliding pair.

5. The transmission oil seal installation mechanism according to claim 4, characterized in that: A bushing is arranged in the sliding connection hole.

6. The transmission oil seal installation mechanism according to claim 4, characterized in that: At least two of the columns are connected to each other via a connecting plate, and the columns extend above the guide ring and are fixedly connected to the connecting plate.

7. The transmission oil seal installation mechanism according to claim 6, characterized in that: The upright column and the connecting plate are fixedly connected by fastening bolts.

8. The transmission oil seal installation mechanism according to claim 1, characterized in that: The wall thickness of the sleeve is 0.5 mm to 1.5 mm, the outer wall of the sleeve is ground, and the roughness of the outer wall of the sleeve is Ra0.

4.

9. The transmission oil seal installation mechanism according to claim 1, characterized in that: The connection position between the oil seal push-out ring and the sliding connection piece is cold welded; And / or, the guide ring and the intermediate connecting piece are fixed at the connection position by cold welding; And / or, the connection position between the annular body and the intermediate connecting piece is fixed by cold welding.

10. The transmission oil seal installation mechanism according to claim 1, characterized in that: The oil seal mounting frame is subjected to quenching and tempering treatment, and the hardness is HRC32-36, and the surface of the oil seal mounting frame is hard chrome plated; And / or, the oil seal push ring is subjected to tempering treatment, and the hardness is HRC32-36, and the surface of the oil seal push ring is hard chrome plated.

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