Pressing auxiliary positioning tool for oil seal pre-installation

Abstract

The utility model relates to the technical field of auxiliary positioning, and discloses an oil seal pre-installation pressing auxiliary positioning tool which comprises a positioning cylinder and a positioning block, and the positioning cylinder is matched with an installation hole of a workpiece in an inserted mode; a positioning ring is arranged on the outer wall of the positioning cylinder; an annular positioning groove for placing the oil seal is formed in the positioning ring; a plurality of positioning blocks are arranged on the outer wall of the positioning cylinder in the circumferential direction of the axis. The oil seal mounting structure has the effects that the oil seal can be conveniently positioned and mounted, and the mounting effect of the oil seal is improved.

Description

Technical Field

[0001] This application relates to the field of auxiliary positioning technology, and in particular to an auxiliary positioning tooling for pre-installing and clamping oil seals. Background Technology

[0002] Oil seals are an important basic mechanical component, mainly used to prevent the leakage of media such as lubricating oil and hydraulic oil in equipment. They also prevent external dust and impurities from entering the equipment, ensuring normal operation.

[0003] When pre-installing the oil seal on the workpiece, the outer diameter of the oil seal is aligned with the mounting hole on the workpiece, and the oil seal is pressed into the workpiece hole using equipment such as a press. During the pressing process, it is essential to ensure the coaxiality of the oil seal to prevent it from being pressed out of alignment, which would affect the sealing effect.

[0004] There is a workpiece, referring to Figure 1 The workpiece 1 has a mounting hole 11, and an annular mounting groove 12 is provided on the outer wall of the opening of the mounting hole 11. (Refer to...) Figure 2 An oil seal 2 is available, which includes a first ring body 21 and a second ring body 22. The first ring body 21 and the second ring body 22 are coaxially arranged, and the oil seal 2 is T-shaped in general. The second ring body has an annular fixing groove 221 on the side away from the first ring body.

[0005] When installing an oil seal on a workpiece, the outer ring of the inner wall of the oil seal's fixing groove needs to be placed in the mounting groove.

[0006] The inner ring of the inner wall is placed in the mounting hole, and then the oil seal is pressed onto the workpiece by a press.

[0007] However, currently, when positioning the oil seal on the workpiece, the oil seal is usually placed directly on the workpiece. Sometimes, the axis of the oil seal and the axis of the mounting hole will deviate, affecting the installation effect. Utility Model Content

[0008] To facilitate the positioning and installation of oil seals and improve the installation effect, this application provides an auxiliary positioning tool for pre-installation and clamping of oil seals.

[0009] The oil seal pre-installation clamping auxiliary positioning fixture provided in this application adopts the following technical solution:

[0010] An auxiliary positioning fixture for pre-installation and clamping of an oil seal includes a positioning cylinder and a positioning block, wherein:

[0011] The positioning cylinder and the workpiece are connected by an insertion hole;

[0012] The outer wall of the positioning cylinder is provided with a positioning ring;

[0013] The positioning ring is provided with an annular positioning groove for placing an oil seal;

[0014] Multiple positioning blocks are provided on the outer wall of the positioning cylinder along the circumferential direction of the axis.

[0015] Optionally, the positioning block is movably connected to the positioning cylinder;

[0016] The positioning block is adjusted in distance from the inner wall of the mounting hole by a power unit.

[0017] Optionally, the positioning cylinder has a placement groove on its wall;

[0018] The positioning block is placed inside the placement groove and rotates in conjunction with the inner wall of the placement groove.

[0019] Optionally, the outer wall of the positioning cylinder is provided with a connecting groove;

[0020] The connecting slot is placed between two adjacent placement slots;

[0021] The positioning block is equipped with a limiting rod;

[0022] The positioning block is rotatably engaged with the inner wall of the placement groove via the limiting rod.

[0023] Optionally, the end of the limiting rod penetrates the inner wall of the placement groove and is placed in the connecting groove;

[0024] One end of the limiting rod is provided with a limiting block;

[0025] The other end of the limiting rod is provided with a limiting pin.

[0026] Optionally, the power unit includes a push column;

[0027] The push column is placed inside the positioning cylinder and slides with the positioning cylinder along the axial direction;

[0028] The surface of the push column is provided with a coaxially arranged annular push groove.

[0029] The inner wall of the pushing groove includes a first groove and a second groove;

[0030] The positioning block is divided into a first block and a second block;

[0031] The first block and the wall of the first tank are in contact;

[0032] The second block and the second tank wall are in contact.

[0033] Optionally, a locking spring is provided between the push column and the inner wall of the end of the positioning cylinder.

[0034] Optionally, the opening end of the positioning cylinder is provided with a guide groove;

[0035] The end of the push column is provided with a guide block;

[0036] The guide block slides into the guide groove.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. By having multiple points of contact between the positioning groove of the positioning cylinder and the inner and outer walls of the first ring of the oil seal, and by the cooperation between the positioning ring and the second ring, the oil seal and the positioning cylinder are ensured to be coaxial. At the same time, the positioning block is fitted with the inner wall of the workpiece mounting hole through the power unit, so as to achieve coaxial alignment between the positioning cylinder and the workpiece mounting hole, thereby significantly improving the axial accuracy of the oil seal installation and avoiding sealing failure caused by eccentricity.

[0039] 2. The power unit (push column, limit rod, locking spring) achieves automatic unfolding and retraction of the positioning block through sliding cooperation, eliminating the need for manual adjustment of each positioning component; the guide groove and guide block design of the positioning cylinder simplifies the operation of the push column, and the preload of the locking spring maintains positioning stability, making the oil seal press-fit process labor-saving and accurate, and significantly shortening the installation cycle;

[0040] 3. The angle between the inner rings of the first and second rings of the oil seal forms an independent lubrication space. The positioning cylinder is coaxially positioned to avoid scraping of the lubricating grease during installation. The cooperative limiting structure of the limiting rod and the connecting groove further reduces radial wobble during assembly, thereby effectively protecting the uniformity of lubricating grease distribution, extending the service life of the oil seal and maintaining the stability of sealing performance. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the workpiece according to an embodiment of this application.

[0042] Figure 2 This is a schematic diagram of an oil seal according to an embodiment of this application.

[0043] Figure 3 This is a schematic diagram of the overall structure of an embodiment of this application.

[0044] Figure 4 This is a schematic diagram illustrating the positioning cylinder structure in an embodiment of this application.

[0045] Figure 5 This is a schematic diagram illustrating the positional relationship between the push column and the positioning block in an embodiment of this application.

[0046] Figure 6 This is a schematic diagram illustrating the positional relationship between the positioning block and the limiting rod in an embodiment of this application.

[0047] Figure 7This is a schematic diagram illustrating the push column structure in the embodiments of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Workpiece; 11. Mounting hole; 12. Mounting groove; 2. Oil seal; 21. First ring body; 22. Second ring body; 221. Fixing groove; 3. Positioning cylinder; 31. Positioning ring; 311. Positioning groove; 32. Placement groove; 33. Connecting groove; 34. Locking hole; 35. Locking block; 36. Guide groove; 4. Positioning block; 41. First block body; 42. Second block body; 5. Limiting rod; 6. Pushing column; 61. Pushing groove; 62. First groove body; 63. Second groove body; 64. Second locking groove; 65. Guide block. Detailed Implementation

[0050] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0051] This application discloses an auxiliary positioning fixture for pre-installing and clamping oil seals.

[0052] A mounting hole 11 is provided on the workpiece 1, and an annular mounting groove 12 is provided on the outer wall of the opening of the mounting hole 11 on the workpiece 1. An oil seal 2 is provided, comprising a first ring body 21 and a second ring body 22, which are coaxially arranged, and the oil seal 2 is T-shaped overall. An annular fixing groove 221 is provided on the side of the second ring body 22 away from the first ring body 21.

[0053] An auxiliary positioning fixture for pre-installing and clamping an oil seal includes a positioning cylinder 3 and positioning blocks 4. The positioning cylinder 3 is inserted into the mounting hole 11 of the workpiece 1. A positioning ring 31 is provided on the outer wall of the positioning cylinder 3. The positioning ring 31 is provided with an annular positioning groove 311 for placing the oil seal 2. Multiple positioning blocks 4 are provided on the outer wall of the positioning cylinder 3 along the circumferential direction of the axis.

[0054] The positioning cylinder 3 and the positioning ring 31 are coaxial. The positioning ring 31 is located at the end of the positioning cylinder 3 and is flush with the positioning end cylinder. The positioning cylinder 3 and the positioning ring 31 are integrally formed. The positioning groove 311 is located on the side of the positioning cylinder 3 close to the workpiece 1, and the positioning groove 311 is coaxial with the positioning cylinder 3.

[0055] When placing the oil seal 2, the first ring 21 of the oil seal 2 is placed inside the positioning groove 311, so that the outer wall of the first ring 21 contacts the outer ring of the inner wall of the positioning groove 311, and the inner wall of the first ring 21 contacts the inner ring of the inner wall of the positioning groove 311, and the second ring 22, on the side closer to the first ring 21, contacts the positioning ring 31. The oil seal 2 and the positioning cylinder 3 are made coaxial through multi-faceted contact between the oil seal 2 and the positioning ring 31.

[0056] After placing the oil seal 2 on the positioning cylinder 3, the positioning cylinder 3 is inserted into the mounting hole 11 of the workpiece 1. By making multiple positioning blocks 4 contact the inner wall of the mounting hole 11 of the workpiece 1, the positioning cylinder 3 is positioned, making the positioning cylinder 3 and the mounting hole 11 of the workpiece 1 coaxial, thereby making the oil seal 2 and the positioning cylinder 3 coaxial.

[0057] When installing oil seal 2 onto workpiece 1, the press uses the positioning ring 31 on the positioning cylinder 3 to press oil seal 2 firmly onto workpiece 1, ensuring that the wall of the mounting hole 11 of workpiece 1 is coaxially positioned in the fixing groove 221 of oil seal 2. This improves the convenience and positioning accuracy of installing oil seal 2. After oil seal 2 is installed, the positioning cylinder 3 can be removed from the mounting hole 11 of workpiece 1.

[0058] The inner rings of the first ring 21 and the second ring 22 are provided with a certain included angle. The side of the first ring 21 and the side of the second ring 22 are in contact with the inner wall of the positioning groove 311 and form a lubrication space with the inner wall of the positioning groove 311. The lubrication space is provided with lubricating grease.

[0059] The positioning cylinder 3 positions the oil seal 2, reducing the possibility of scraping grease on the lubrication space, the first ring 21, and the second ring 22 during the positioning process. The positioning block 4 is movably connected to the positioning cylinder 3, and the distance between the positioning block 4 and the inner wall of the mounting hole 11 is adjusted by the power unit.

[0060] The positioning cylinder 3 has a placement groove 32 on its wall. Multiple placement grooves 32 are provided circumferentially along the axis of the positioning cylinder 3. In this embodiment, there are three placement grooves 32, which penetrate the wall of the positioning cylinder 3. The positioning block 4 corresponds to the placement groove 32 one by one. The positioning block 4 is placed in the corresponding placement groove 32 and rotates with the inner wall of the placement groove 32.

[0061] The outer wall of the positioning cylinder 3 is provided with a connecting groove 33. Multiple connecting grooves 33 are provided circumferentially along the axis of the positioning cylinder 3, and a connecting groove 33 is provided between each two adjacent placement grooves 32.

[0062] The positioning block 4 is provided with a limiting rod 5, which passes through the positioning block 4 and rotates with the positioning block 4. Both ends of the limiting rod 5 pass through the groove wall of the placement groove 32 and are placed in the connecting groove 33. The limiting rod 5 rotates with the groove wall of the placement groove 32.

[0063] One end of the limiting rod 5 is provided with a limiting block, and the other end of the limiting rod 5 is inserted and matched with a limiting pin. The limiting block and the limiting pin work together to limit the limiting rod 5 through the inner wall of the connecting groove 33, thereby facilitating the limiting rod 5 to be limited in the axial direction while lifting and installing the limiting rod 5.

[0064] After the positioning cylinder 3 is placed into the mounting hole 11, the power unit causes multiple positioning blocks 4 to rotate synchronously around the corresponding limiting rods 5, making the positioning blocks 4 contact the inner wall of the mounting hole 11. This is used to install the positioning cylinder 3 in the mounting hole 11 and make the axis of the positioning cylinder 3 coincide with the axis of the mounting hole 11.

[0065] The power unit includes a push column 6, which is placed inside the positioning cylinder 3 and slides with the positioning cylinder 3 along the axial direction. The push column 6 has a coaxially arranged annular push groove 61 on its surface. The inner wall of the push groove 61 includes a first groove 62 and a second groove 63. The positioning block 4 is divided into a first block 41 and a second block 42. The first block 41 is in contact with the wall of the first groove 62, and the second block 42 is in contact with the wall of the second groove 63.

[0066] When it is necessary for the positioning block 4 to contact the inner wall of the mounting hole 11, the push column 6 is moved toward the direction of the oil seal 2, so that the wall of the second groove 63 and the second block 42 of the positioning block 4 are in contact, and the second block 42 is pushed to rotate around the limiting rod 5, so as to facilitate the positioning of the positioning cylinder 3 by the positioning block 4.

[0067] To facilitate the rotation of the positioning block 4 toward the inner wall near the mounting hole 11, the limiting rod 5 is located near the oil seal 2 on the positioning block 4.

[0068] In order to facilitate the movement of the push column 6 toward the oil seal 2, a locking spring is provided between the inner wall of the end of the push column 6 and the positioning cylinder 3. The spring force of the locking spring causes the push column 6 to move toward the oil seal 2, thereby facilitating the contact between the positioning block 4 and the inner wall of the mounting hole 11 for a long time.

[0069] The positioning cylinder 3 has a locking hole 34 at the end away from the oil seal 2. A locking block 35 is threadedly connected to the locking hole 34. The locking spring is in contact with the locking block 35. The preload of the locking spring can be adjusted by adjusting the position of the locking block 35. At the same time, it is also convenient to disassemble and install the locking spring.

[0070] The locking block 35 is provided with a first locking groove, and one end of the locking spring is placed in the first locking groove to position the locking spring. At the same time, the push column 6 is provided with a second locking groove 64 on the side near the locking block 35, and the other end of the locking spring is placed in the second locking groove 64. The groove walls of the first locking groove and the second locking groove 64 work together to position the locking spring, reducing the possibility of the locking spring shifting and making it easier for the axis of the push column 6 to coincide with the axis of the positioning cylinder 3.

[0071] When it is necessary to remove the positioning cylinder 3 from the mounting hole 11, the push column 6 is moved away from the oil, so that the wall of the first groove 62 and the first block 41 of the positioning block 4 come into contact, so that the first block 41 rotates around the limiting rod 5, and the second block 42 moves away from the inner wall of the mounting hole 11, thereby facilitating the removal of the positioning cylinder 3.

[0072] The positioning cylinder 3 has a guide groove 36 at its open end and a guide block 65 at its end. The guide block 65 slides in conjunction with the guide groove 36.

[0073] In this embodiment, the push column 6 moves away from the oil seal 2 mainly by the operator pressing it by hand. When the push column 6 squeezes the locking spring, the inner wall of the guide groove 36 gradually guides the guide block 65, thereby improving the ease of movement of the push column 6. At the same time, it also makes it easier to make the axis of the push column 6 coincide with the axis of the positioning cylinder 3.

[0074] In this embodiment, the mounting hole 11 is set with the opening facing downwards, and the oil seal 2 is installed in the mounting hole 11. The positioning block 4 not only positions the positioning cylinder 3 to ensure the position accuracy of the oil seal 2, but also, the positioning block 4 is stuck inside the mounting hole 11, which improves the working stability of the positioning cylinder 3 and reduces the possibility of the oil seal 2 falling off. After the oil seal 2 is installed in the mounting hole 11, the press squeezes the oil seal 2 in the mounting hole 11 in the direction from bottom to top.

[0075] The positioning block 4 has an arc surface on the side near the inner wall of the mounting hole 11. When the positioning block 4 contacts the inner wall of the mounting hole 11, the arc surface of the positioning block 4 near the inner wall of the mounting hole 11 fits against the inner wall of the mounting hole 11, thereby further improving the stability and positional accuracy of the positioning cylinder 3.

[0076] To further reduce the possibility of scraping the grease on the inner wall of the oil seal 2, the outer diameter of the positioning cylinder 3 is smaller than the inner diameter of the oil seal 2.

[0077] The implementation principle of the oil seal pre-installation clamping auxiliary positioning fixture in this application embodiment is as follows: First, the first ring 21 of the oil seal 2 is placed in the positioning groove 311 of the positioning cylinder 3. The outer wall of the first ring 21 contacts the outer ring of the inner wall of the positioning groove 311, the inner wall contacts the inner ring of the inner wall, and the side of the second ring 22 near the first ring 21 contacts the positioning ring 31, thereby achieving coaxial positioning of the oil seal 2 and the positioning cylinder 3. Then, the positioning cylinder 3 is inserted into the mounting hole 11 of the workpiece 1, and the positioning block 4 is driven by the power unit (composed of the push column 6, the limit rod 5, the locking spring, etc.). The positioning block 4 is rotated around the limiting rod 5 to contact the inner wall of the mounting hole 11, ensuring that the positioning cylinder 3 is coaxial with the mounting hole 11. Then, the oil seal 2 is pressed by the press through the positioning ring 31, so that the wall of the mounting hole 11 of the workpiece 1 is embedded into the fixing groove 221 of the oil seal 2, completing the installation of the oil seal 2. Finally, the locking spring is compressed by manually pressing the push column 6, so that the positioning block 4 is disengaged from the inner wall of the mounting hole 11. With the sliding cooperation of the guide groove 36 and the guide block 65, the positioning cylinder 3 can be easily removed. The whole process ensures the coaxial accuracy of the oil seal 2 installation and reduces the risk of damage to the lubrication space.

[0078] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary positioning fixture for pre-installing and clamping oil seals, characterized in that: Includes a positioning cylinder and a positioning block, wherein: The positioning cylinder and the workpiece are connected by an insertion hole; The outer wall of the positioning cylinder is provided with a positioning ring; The positioning ring is provided with an annular positioning groove for placing an oil seal; Multiple positioning blocks are provided on the outer wall of the positioning cylinder along the circumferential direction of the axis.

2. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 1, characterized in that: The positioning block is movably connected to the positioning cylinder; The positioning block is adjusted in distance from the inner wall of the mounting hole by a power unit.

3. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 2, characterized in that: The positioning cylinder has a placement groove on its wall; The positioning block is placed inside the placement groove and rotates in conjunction with the inner wall of the placement groove.

4. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 3, characterized in that: The outer wall of the positioning cylinder is provided with a connecting groove; The connecting slot is placed between two adjacent placement slots; The positioning block is equipped with a limiting rod; The positioning block is rotatably engaged with the inner wall of the placement groove via the limiting rod.

5. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 4, characterized in that: The end of the limiting rod penetrates the inner wall of the placement groove and is placed in the connecting groove; One end of the limiting rod is provided with a limiting block; The other end of the limiting rod is provided with a limiting pin.

6. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 3, characterized in that: The power unit includes a push column; The push column is placed inside the positioning cylinder and slides with the positioning cylinder along the axial direction; The surface of the push column is provided with a coaxially arranged annular push groove. The inner wall of the pushing groove includes a first groove and a second groove; The positioning block is divided into a first block and a second block; The first block and the wall of the first tank are in contact; The second block and the second tank wall are in contact.

7. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 6, characterized in that: A locking spring is provided between the inner wall of the push column and the end of the positioning cylinder.

8. The oil seal pre-installation clamping auxiliary positioning fixture according to claim 6, characterized in that: The positioning cylinder has a guide groove at its open end; The end of the push column is provided with a guide block; The guide block slides into the guide groove.

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