Mechanism for installing transmission oil seal

Abstract

The utility model 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 utility model 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 utility model relates to transmission assembly technical field especially is a kind of mechanism for transmission oil seal installation. BACKGROUND

[0002] Oil seal is a kind of precision mechanical element to prevent leakage of lubricating oil in transmission system. In the assembly process of transmission, oil seal needs to be installed on oil seal installation shaft (oil seal installation shaft includes spline shaft section and to be installed shaft section connected with spline shaft section, and the connecting position of spline shaft section and to be installed shaft section has shaft shoulder), and the installation of oil seal is a key step, especially the oil seal lip cannot have any impurities, foreign matters and damage in the installation process, otherwise it is easy to cause assembly to leak lubricating oil.

[0003] In the production process of commercial vehicle transmission, most of the oil seals need to pass through the shaft section of oil seal installation shaft, especially spline shaft section, and then be installed on to-be-installed shaft section. The prior art installs oil seal manually, and in the manual installation process, most of them still rely on the experience of assembly workers or the way of protecting the shaft head with protective layer to protect oil seal, so it is difficult to completely avoid the skew and scratch of oil seal, and further cause damage to the inner lip of oil seal, affect normal functionality, and the operation is difficult to control. SUMMARY

[0004] Therefore, the utility model wants to overcome the above problems existing in prior art.

[0005] To solve the above technical problems, the utility model provides a kind of mechanism for transmission oil seal installation, including:

[0006] Oil seal installation frame, including guide ring, oil seal installation sleeve and intermediate connecting piece;Guide ring is connected in the top of oil seal installation sleeve by intermediate connecting piece;Oil seal installation sleeve includes circular ring main body and sleeve connected at the bottom of circular ring main body;The inner diameter of circular ring main body and sleeve is equal, and the outer diameter of circular ring main body is greater than the outer diameter of sleeve;

[0007] Oil seal push ring, including oil seal push-out ring and sliding connecting piece connected at the top of oil seal push-out ring, oil seal push-out ring is sleeved on the outside of sleeve, and there is gap between oil seal push-out ring and sleeve;Sliding connecting piece is slidably connected with guide ring and oil seal installation sleeve, for driving oil seal to move along its axial direction;The inner diameter of oil seal push-out ring is greater than the inner diameter of oil seal and less than the outer diameter of oil seal;

[0008] Wherein, oil seal push-out ring abuts on the upper surface of oil seal;Sliding connecting piece moves downward to drive oil seal to move downward and be installed on to-be-installed shaft section.

[0009] In an embodiment of the utility model, the inner diameter of sleeve is less than the outer diameter of to-be-installed shaft section, and greater than the outer diameter of spline shaft section.

[0010] In one embodiment of the utility model, the end of sleeve far away from the annular body is chamfered, and the edge of the chamfer is rounded.

[0011] In one embodiment of the utility model, the sliding connecting piece comprises a plurality of vertical extending columns; the bottom ends of the plurality of columns are fixedly connected with the oil seal push-out ring, and the top ends are connected with each other; the guide ring and the oil seal mounting sleeve are respectively provided with sliding connecting holes matched with the columns, and the columns and the sliding connecting holes constitute a sliding pair.

[0012] In one embodiment of the utility model, a bushing is arranged in the sliding connecting hole.

[0013] In one embodiment of the utility model, the at least two columns are connected with each other through a connecting plate, and the columns extending above the guide ring are fixedly connected with the connecting plate.

[0014] In one embodiment of the utility model, the column and the connecting plate are fixedly connected through a fastening bolt.

[0015] In one embodiment of the utility model, 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.

[0016] In one embodiment of the utility model, the connection position of the oil seal push-out ring and the sliding connecting piece is fixed by cold welding.

[0017] In one embodiment of the utility model, the connection position of the guide ring and the intermediate connecting piece is fixed by cold welding.

[0018] In one embodiment of the utility model, the connection position of the annular body and the intermediate connecting piece is fixed by cold welding.

[0019] In one embodiment of the utility model, the oil seal mounting frame is subjected to quenching and tempering treatment, the hardness is HRC32 to 36, and the surface of the oil seal mounting frame is plated with hard chromium.

[0020] In one embodiment of the utility model, the oil seal push ring is subjected to quenching and tempering treatment, the hardness is HRC32 to 36, and the surface of the oil seal push ring is plated with hard chromium.

[0021] In one embodiment of the utility model, the oil seal mounting frame is subjected to quenching and tempering treatment, the hardness is HRC32 to 36, and the surface of the oil seal mounting frame is plated with hard chromium; the oil seal push ring is subjected to quenching and tempering treatment, the hardness is HRC32 to 36, and the surface of the oil seal push ring is plated with hard chromium.

[0022] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0023] The transmission oil seal installation mechanism, only needs to sleeve the oil seal on the sleeve, then sleeves the device on the oil seal installation shaft, and uses the driving oil seal push ring to move to make the oil seal installation in place. The oil seal installation process is controllable, simple to operate and easy to use by using the application, solves the installation problems of the inconvenient traditional assembly mode and the damaged parts, the oil seal inner lip is physically isolated between the spline shaft section by the sleeve during installation, thereby effectively protecting the oil seal from being damaged when passing through the spline shaft section, solves the problem that the inner lip is easily damaged when the oil seal passes through the spline shaft section. Secondly, when the oil seal is moved in the installation direction by using the application, the application guides the oil seal, so that the oil seal does not produce skew during the installation process, effectively guarantees the functionality of the oil seal, and greatly reduces the risk of product quality problems. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to the specific embodiments of the utility model and in conjunction with the drawings, wherein:

[0025] Figure 1 It is a structure schematic view of the transmission oil seal installation mechanism in the preferred embodiment of the utility model;

[0026] Figure 2 It is Figure 1 The cross-sectional view of the transmission oil seal installation mechanism;

[0027] Figure 3 It is Figure 1 The structure schematic view of the oil seal installation frame in the transmission oil seal installation mechanism of

[0028] Figure 4 It is Figure 3 The front view;

[0029] Figure 5 It is Figure 4 The B-B cross-sectional view of

[0030] Figure 6 It is Figure 4 The top view of

[0031] Figure 7 It is Figure 6 The A-A cross-sectional view of

[0032] Figure 8 It is Figure 1 The structure schematic view of the oil seal push ring in the transmission oil seal installation mechanism of

[0033] Figure 9 It is Figure 8 The front view;

[0034] Figure 10is Figure 8 a top view of the oil seal installation mechanism of the present application;

[0035] Figure 11 is a schematic diagram of oil seal installation using the present application;

[0036] Description of the Drawings: 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 connection hole;

[0037] 200, oil seal push ring; 210, oil seal push-out ring; 220, sliding connecting piece; 221, stand; 222, connecting plate; 223, fastening bolt;

[0038] 300, oil seal;

[0039] 400, oil seal mounting shaft; 410, spline shaft section; 420, to-be-mounted shaft section. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. The embodiments are not intended to limit the present application.

[0041] Referring to Figures 1-11 , the embodiment of the present application provides an oil seal installation mechanism for a transmission, comprising:

[0042] The oil seal mounting frame 100 comprises a guide ring 110, an oil seal mounting sleeve 120, and an intermediate connecting piece 130. The guide ring 110 is connected above the oil seal mounting sleeve 120 through the intermediate connecting piece 130. The oil seal mounting sleeve 120 comprises a circular ring body 121 and a sleeve 122 connected to the bottom of the circular ring body 121. The inner diameter of the circular ring body 121 is equal to that of the sleeve 122, and the outer diameter of the circular ring body 121 is greater than that of the sleeve 122. In some embodiments, the intermediate connecting piece 130 is a circular columnar structure. The intermediate connecting piece 130 can be two or more. The plurality of intermediate connecting pieces 130 are distributed symmetrically 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.

[0043] The oil seal pushing ring 200 comprises an oil seal pushing ring 210 and a sliding connecting piece 220 connected to the top of the oil seal pushing ring 210, the oil seal pushing ring 210 is sleeved outside the sleeve 122, and a gap is formed between the oil seal pushing ring 210 and the sleeve 122; the sliding connecting piece 220 is staggered with the intermediate connecting piece 130. The sliding connecting piece 220 is in sliding connection with the guide ring 110 and the oil seal mounting sleeve 120, and is used to drive the oil seal 300 to move along the axial direction; the inner diameter of the oil seal pushing ring 210 is greater than the inner diameter of the oil seal 300 and less than the outer diameter of the oil seal 300;

[0044] The oil seal pushing ring 210 is in abutment with the upper surface of the oil seal 300; the sliding connecting piece 220 is moved downward to drive the oil seal 300 to move downward and be mounted on the shaft section 420 to be mounted.

[0045] Specifically, the sleeve 122 of the oil seal mounting frame 100 is used to sleeve the oil seal 300 in the embodiment, and the oil seal pushing ring 210 is in sliding connection with the oil seal mounting frame 100 through the sliding connecting piece 220; in this way, when the oil seal 300 is mounted, 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 300 can be smoothly pushed to the pre-mounting position of the shaft section 420 to be mounted by pushing the oil seal pushing ring 210.

[0046] Therefore, according to the embodiment, the oil seal 300 is only needed to be sleeved on the sleeve 122, and then the device is sleeved on the oil seal mounting shaft 400, and the oil seal 300 is mounted in place by moving the oil seal pushing ring 210. The process of mounting the oil seal 300 by using the application is controllable and easy to operate, and solves the problems of inconvenience and damage to parts in the traditional mounting method; the inner lip of the oil seal 300 is physically isolated from the spline shaft section 410 by the sleeve 122 during installation, so that the oil seal 300 is effectively protected from damage when passing through the spline shaft section 410, and the problem of damage to the inner lip of the oil seal 300 when passing through the spline shaft section 410 during installation is solved. Secondly, when the oil seal 300 is pushed to move in the mounting direction by using the application, the oil seal 300 is guided by the application, so that the oil seal 300 will not be skewed during the installation process, and the functionality of the oil seal 300 is effectively guaranteed, and the risk of product quality problems is greatly reduced.

[0047] Further, the inner diameter of the sleeve 122 is smaller than the outer diameter of the to-be-installed shaft section 420 and larger than the outer diameter of the spline shaft section 410. Specifically, when the oil seal 300 is installed, the oil seal mounting frame 100 of the present application is first clamped at the shaft shoulder position between the spline shaft section 410 and the to-be-installed shaft section 420 before the present application reaches the to-be-installed shaft section 420, and then the oil seal 300 is pushed onto the to-be-installed shaft section 420. In this way, when the oil seal 300 is pushed, the axis of the present application and the axis of the to-be-installed shaft section 420 are always in a state of coincidence, avoiding the oil seal 300 from being skewed when the oil seal 300 is pushed, and further ensuring that the oil seal 300 is smoothly installed onto the to-be-installed shaft section 420. In addition, it can also avoid damage to the installation of other components.

[0048] Further, the 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 sleeving of the oil seal 300, and can also avoid damage to the oil seal 300 when the oil seal 300 is sleeved into the sleeve 122.

[0049] Further, the sliding connecting piece 220 includes a plurality of vertically extending columns 221; the bottom ends of the plurality of columns 221 are respectively fixedly connected with the oil seal pushing ring 210, and the top ends are connected with each other; the guide ring 110 and the oil seal mounting sleeve 120 are respectively provided with sliding connection holes 140 matched with the columns 221, and the columns 221 and the sliding connection holes 140 constitute a sliding pair. Specifically, the structure of the present embodiment is simple.

[0050] Further, a bushing (not shown in the figure) is arranged 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.

[0051] Further, at least two columns 221 are connected with each other through a connecting plate 222, and the columns 221 extending above the guide ring 110 are fixedly connected with the connecting plate 222. Specifically, the present embodiment realizes the connection and fixation between the columns 221 through the connecting plate 222, so as to ensure that the spacing between the columns 221 is constant. In turn, the change of the spacing between the columns 221 does not affect the sliding fit between the columns 221 and the sliding connection holes 140. In addition, the connecting plate 222 can be manually held to drive the columns 221 and the oil seal pushing ring 210 to move up and down synchronously, which has the advantages of simple structure, convenient and fast operation, and low manufacturing cost.

[0052] Further, the column 221 is fixedly connected with the connecting plate 222 through the fastening bolt 223. In some embodiments, the connecting plate 222 is a hole waist-shaped thin plate, the top end of the column 221 is provided with a threaded hole, and the fastening bolt 223 is threadedly connected with the threaded hole through the hole of the connecting plate 222. Specifically, the column 221 is fixedly connected with the connecting plate 222 through the fastening bolt 223 in the embodiment, and the installation and dismounting are convenient, and the connection is stable and reliable.

[0053] Further, the wall thickness of the sleeve 122 is 0.5 mm ~1.5mm, the outer wall of the sleeve 122 is ground, and the roughness of the outer wall of the sleeve 122 is Ra0.4.

[0054] Further, the connecting position of the oil seal push-out ring 210 and the sliding connecting piece 220 is cold welded. Since the connecting position of the oil seal push-out ring 210 and the sliding connecting piece 220 is prone to deformation, the two are cold welded without obvious deformation; after welding, the welding marks are processed without obvious sharp corners and protrusions; thereby reducing the deformation of the connecting position.

[0055] Further, the connecting position of the guide ring 110 and the intermediate connecting piece 130 is cold welded. Further, the connecting position of the circular ring body 121 and the intermediate connecting piece 130 is cold welded. Since the connecting position of the guide ring 110 and the intermediate connecting piece 130 and the connecting position of the circular ring body 121 and the intermediate connecting piece 130 are prone to deformation, the cold welding process is used for fixation without obvious deformation; after welding, the welding marks are processed without obvious sharp corners and protrusions; thereby reducing the deformation of the connecting position.

[0056] Further, the oil seal mounting frame 100 is subjected to quenching and tempering treatment, the hardness is HRC32~36, and the surface of the oil seal mounting frame 100 is plated with hard chromium. In other embodiments, the oil seal push ring 200 is subjected to quenching and tempering treatment, the hardness is HRC32~36, and the surface of the oil seal push ring 200 is plated with hard chromium. In other embodiments, the oil seal mounting frame 100 is subjected to quenching and tempering treatment, the hardness is HRC32~36, and the surface of the oil seal mounting frame 100 is plated with hard chromium; the oil seal push ring 200 is subjected to quenching and tempering treatment, the hardness is HRC32~36, and the surface of the oil seal push ring 200 is plated with hard chromium. Specifically, the oil seal mounting frame 100 and / or the oil seal push ring 200 in the embodiment are subjected to quenching and tempering treatment to ensure the hardness.

[0057] When the oil seal 300 is installed, the oil seal 300 is first installed on the oil seal mounting sleeve 120, and then the connecting plate 222 is manually lifted to put the application into the oil seal mounting shaft 400 until the oil seal mounting sleeve 120 stops in front of the to-be-installed shaft section 420. Then, the connecting plate 222 is pressed to make the oil seal push ring 210 slide into the to-be-installed shaft section 420 according to the installation direction of the oil seal 300, and at the same time, the oil seal 300 is pushed to the pre-installation position by the oil seal push ring 200. The oil seal mounting frame 100 is lifted to perform the next step of the oil seal 300 installation.

[0058] The application can effectively solve the problem that the inner lip of the oil seal 300 is easily damaged by the shaft section during installation, and reduce 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 cope with the protection problem of the installation of the oil seal 300 under different conditions, and has strong compatibility.

[0059] The application is suitable for all occasions where the oil seal 300 is put into the corresponding shaft section under the installation conditions. The application can protect the inner lip of the oil seal 300 from being scratched by burrs, splines or steps, and effectively solve the problem of insufficient protection of the oil seal 300 during installation, thereby effectively avoiding the problem of oil leakage of the transmission.

[0060] Obviously, the above embodiments are only examples for clear illustration, and are not limited to the embodiments. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the application.

Claims

1. A transmission oil seal installation mechanism characterized by: The oil seal mounting frame comprises a guide ring, an oil seal mounting sleeve and an intermediate connecting piece; the guide ring is connected above the oil seal mounting sleeve through the intermediate connecting piece; the oil seal mounting sleeve comprises a circular ring main body and a sleeve connected at the bottom of the circular ring main body; the inner diameter of the circular ring main body is equal to that of the sleeve, and the outer diameter of the circular ring main body is greater than that of the sleeve; The oil seal push ring comprises an oil seal push-out ring and a sliding connecting piece connected at the top of the oil seal push-out ring, the oil seal push-out ring is sleeved outside the sleeve, and the oil seal push-out ring has a gap with the sleeve; the sliding connecting piece is in sliding connection with the guide ring and the oil seal mounting sleeve, and is used to drive the oil seal to move along the axial direction; the inner diameter of the oil seal push-out ring is greater than the inner diameter of the oil seal and less 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 connecting piece moves downward to drive the oil seal to move downward and be mounted on the shaft section to be mounted. The inner diameter of the sleeve is less than the outer diameter of the shaft section to be mounted and greater than the outer diameter of the spline shaft section.

2. The transmission oil seal mounting mechanism of claim 1, wherein: The end of the sleeve away from the circular ring main body is chamfered, and the edge of the chamfer is rounded.

3. The transmission oil seal mounting mechanism of claim 1, wherein: The sliding connecting piece comprises a plurality of vertically extending columns; the bottom ends of the columns are respectively fixedly connected with the oil seal push-out ring, and the top ends of the columns are connected with each other; the guide ring and the oil seal mounting sleeve are respectively provided with sliding connecting holes matched with the columns, and the columns and the sliding connecting holes constitute a sliding pair.

4. The transmission oil seal mounting mechanism of claim 1, wherein: A bushing is arranged in the sliding connecting hole.

5. The transmission oil seal mounting mechanism of claim 4, wherein: At least two columns are connected with each other through a connecting plate, and the columns extending above the guide ring are fixedly connected with the connecting plate.

6. The transmission oil seal mounting mechanism of claim 4, wherein: The columns and the connecting plate are fixedly connected through fastening bolts.

7. The transmission oil seal mounting mechanism of claim 6, wherein: The wall thickness of the sleeve is 0.5mm-1.5mm, the outer wall of the sleeve is ground, and the roughness of the outer wall of the sleeve is Ra0.

4.

8. The transmission oil seal mounting mechanism of claim 1, wherein: The connection position of the oil seal push-out ring and the sliding connecting piece is cold-welded; 9. The transmission oil seal mounting mechanism of claim 1, wherein: And / or, the connection position of the guide ring and the intermediate connecting piece is cold-welded and fixed; And / or, the connection position of the circular ring main body and the intermediate connecting piece is cold-welded and fixed. The oil seal mounting frame is subjected to quenching and tempering treatment, and the hardness is HRC32-HRC36; the surface of the oil seal mounting frame is plated with hard chromium; 10. The transmission oil seal mounting mechanism of claim 1, wherein: And / or, the oil seal push ring is subjected to quenching and tempering treatment, and the hardness is HRC32-HRC36; the surface of the oil seal push ring is plated with hard chromium. ​

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