Replacing tool for oil seal of speed reducer

Abstract

The invention provides a speed reducer oil seal replacement tool, relates to the oil seal replacement tool technology, and particularly discloses a loading shell, a mounting cavity is formed in the loading shell, the mounting cavity is used for being connected with a rotating shaft for containing a speed reducer in a sleeving mode, and a mounting base is mounted on the outer side wall of the loading shell; a sealing cover is installed on one side of the loading shell, an access hole coaxial with the circle where the loading shell is located is formed in the side wall of the sealing cover, and a shaft rod is arranged in the access hole in a penetrating mode; a fixing structure connected with the shaft rod is arranged in the mounting cavity, the fixing structure is detachably connected with the speed reducer rotating shaft, and a part of the speed reducer rotating shaft is embedded in the fixing structure; a positioning structure is arranged on the outer side wall of the mounting seat, and the shaft rod is in transmission connection with the positioning structure; according to the tool, through double positioning of the positioning structure and the fixing structure, the tool is positioned and locked in multiple directions, it is ensured that the shaft rod and the rotating shaft are always coaxial, and deviation and inclination are effectively avoided when the oil seal is installed.

Description

Technical Field

[0001] This invention relates to the field of oil seal replacement tooling technology, and more specifically, to a gearbox oil seal replacement tooling. Background Technology

[0002] During the long-term operation of a speed reducer, the oil seal will lose its sealing performance due to wear, aging, deformation, and other factors. In such cases, the oil seal needs to be replaced promptly to ensure the normal operation of the speed reducer. Currently, the replacement of speed reducer oil seals mainly relies on traditional manual operation or simple tooling, resulting in low overall efficiency, high operational difficulty, and numerous technical shortcomings that urgently need to be addressed.

[0003] In existing technologies, when manually replacing oil seals, operators need to use simple tools such as wrenches and screwdrivers to first partially disassemble the reducer, then manually pry the old oil seal off the rotating shaft, and then align the new oil seal with the installation position on the rotating shaft, installing the oil seal in place by manually tapping or pressing. This operation method is not only labor-intensive, but it is also difficult to ensure the coaxiality of the oil seal and the rotating shaft during the operation, which can easily lead to the oil seal tilting or shifting, resulting in oil leakage after installation. At the same time, manual tapping or pressing can easily scratch or deform the oil seal lip, damaging the oil seal structure, reducing the sealing performance and service life of the oil seal, and even requiring multiple oil seal replacements to complete the operation, further increasing the operation cost and time.

[0004] To address the drawbacks of manual operation, some simple gearbox oil seal replacement fixtures have appeared on the market. However, these fixtures generally suffer from unreasonable structural design and limited functionality, failing to meet actual operational needs. Existing simple fixtures lack reliable positioning structures, making it difficult to achieve precise positioning between the fixture and the gearbox housing and rotating shaft. This leads to easy misalignment after installation, resulting in deviations in the oil seal installation position and affecting the sealing effect. Summary of the Invention

[0005] The purpose of this invention is to provide a tooling for replacing the oil seal of a speed reducer, which addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0006] The technical solution of this invention is implemented as follows:

[0007] The present invention provides a tooling for replacing the oil seal of a speed reducer, including a loading shell, an installation chamber inside the loading shell for fitting and accommodating the rotating shaft of the speed reducer, and an installation seat installed on the outer wall of the loading shell.

[0008] A cover is installed on one side of the loading shell. An inlet and outlet hole coaxial with the circle of the loading shell is opened on the side wall of the cover, and a shaft is inserted through the inlet and outlet hole.

[0009] The mounting chamber is equipped with a fixing structure that is connected to the shaft. The fixing structure is detachably connected to the reducer rotating shaft, and a portion of the reducer rotating shaft is embedded in the fixing structure.

[0010] The outer wall of the mounting base is provided with a positioning structure, which is detachably connected to the reducer housing, and the shaft is connected to the positioning structure in a transmission manner.

[0011] The shaft is provided with a locking structure for fixing the oil seal; the fixing structure is located in the annular area formed by the locking structure; the cover is provided with a drive structure for driving the reciprocating motion of the shaft.

[0012] In some technical solutions of the present invention, the positioning structure includes a plurality of positioning shafts, which are mounted around the outer side wall of the mounting base. The free end of the positioning shaft is embedded in the shaft hole on the reducer housing. The free end of the positioning shaft is provided with a mounting groove. The mounting groove is provided with a limiting structure that abuts against the inner wall of the shaft hole. The limiting structure is connected to the shaft drive.

[0013] In some technical solutions of the present invention, the limiting structure includes an airbag structure installed in the mounting groove. Limiting seats are slidably provided on both sides of the mounting groove. A portion of the airbag structure is embedded between the two limiting seats. An installation channel is opened in the positioning shaft. A connecting rod is slidably provided in the installation channel. A pressure plate that contacts the airbag structure is provided on the connecting rod. A slide is opened on the outer wall of the positioning shaft. A connecting frame connected to the connecting rod is slidably provided in the slide. A displacement sleeve that is threadedly connected to the shaft is provided on the outer wall of the shaft. The connecting frame and the displacement sleeve are rotatably connected. A limiting groove is opened in the vertical direction on the outer wall of the cover. An arc-shaped groove connected to the limiting groove is opened around the outer wall of the cover. A limiting block is provided on the outer wall of the displacement sleeve. A portion of the limiting block is embedded in the limiting groove.

[0014] In some technical solutions of the present invention, a plurality of guide grooves are inclinedly provided on the outer side wall of the mounting base, the plurality of guide grooves are arranged around the outer side of the mounting groove, a sliding seat is slidably provided in the guide groove, the shaft extends outward after passing through the sliding seat, and a locking structure for locking the sliding seat on the mounting base is provided on the positioning shaft.

[0015] In some technical solutions of the present invention, the locking structure includes a displacement seat sleeved on the outer wall of the positioning shaft, a stop spring connected to the displacement seat sleeved on the outer wall of the positioning shaft, a locking rod installed on the displacement seat, and the locking rod passing through the sliding seat and embedded in the mounting seat.

[0016] In some technical solutions of the present invention, the fixing structure includes a mounting shaft that is slidably disposed in the mounting cavity, an inlet and outlet channel is provided on the end face of the mounting shaft, and a portion of the shaft rod is embedded in the inlet and outlet channel;

[0017] A mounting plate coaxial with the mounting shaft is mounted on the outer side wall. Several mounting holes are opened radially on the outer arc surface of the mounting plate. A guide rod is slidably installed in each mounting hole. A fixing plate is installed on the extension end of the guide rod. Several fixing plates are arranged in a ring shape after being surrounded. A return spring connected to the guide rod is installed in the mounting hole. A first magnetic pole piece is embedded in each fixing plate.

[0018] In some technical solutions of the present invention, the positioning structure includes several lower pressure frames arranged around the outer side wall of the shaft, and a pressure seat connected to the lower pressure frame is slidably provided in the mounting cavity. A protective ring is installed on the pressure seat, and a second magnetic pole piece is embedded in the protective ring.

[0019] In some technical solutions of the present invention, a groove is also provided on the protective ring, and a blind hole communicating with the groove is provided in the protective ring. A guide rod is slidably provided in the blind hole, and a limiting spring connected to the inner wall of the blind hole is sleeved on the guide rod. An arc plate is installed on the extended end of the guide rod, and several arc plates are enclosed to form a ring. The axis of the circle where the arc plate is located is coaxial with the axis of the shaft.

[0020] In some technical solutions of the present invention, the drive structure includes an internal thread formed on the inner wall of the mounting hole, and an external thread that meshes with the internal thread is formed on the outer wall of the shaft.

[0021] In some technical solutions of the present invention, a rotating handle is installed on the side of the shaft away from the mounting base.

[0022] Compared with the prior art, the present invention has at least the following advantages or beneficial effects: through the dual positioning of the positioning structure and the fixing structure, the positioning structure adopts a composite method of airbag expansion limit and mechanical locking to position and lock the tooling from multiple directions. The fixing structure adopts a method of elastic clamping combined with magnetic assistance to achieve relative fixation of the rotating shaft and the shaft rod, ensuring that the shaft rod and the rotating shaft are always coaxial, effectively avoiding the offset and tilt during oil seal installation, improving the oil seal replacement accuracy, avoiding problems such as oil leakage and wear caused by installation deviation, and extending the service life of the reducer. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the oil seal replacement fixture in this invention.

[0024] Figure 2 This is a half-sectional three-dimensional structural diagram of the oil seal replacement tool in this invention.

[0025] Figure 3 This is a cross-sectional view of the oil seal replacement fixture in this invention.

[0026] Figure 4 This is a schematic diagram of the combined structure of the carding structure and the fixing structure in this invention.

[0027] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0028] Figure 6 This is a bottom view of the oil seal replacement fixture in this invention.

[0029] Figure 7 This is a top view of the oil seal replacement fixture in this invention.

[0030] Figure 8 This is a schematic diagram of the internal structure of the positioning shaft in this invention.

[0031] Reference numerals: 1. Loading shell; 101. Installation chamber; 2. Mounting seat; 201. Guide groove; 202. Sliding seat; 3. Cover; 301. Inlet / outlet hole; 302. Limiting groove; 303. Arc groove; 4. Shaft; 401. Rotating handle; 5. Fixing structure; 501. Mounting shaft; 502. Inlet / outlet channel; 503. Mounting plate; 504. Mounting hole; 505. Guide rod; 506. Fixing plate; 507. Return spring; 508. First magnetic pole component; 6. Positioning structure; 601. Positioning shaft; 602. Mounting groove; 603. Limiting structure 6031. Airbag structure; 6032. Limiting seat; 604. Installation channel; 605. Connecting rod; 606. Pressure plate; 607. Slide rail; 608. Connecting frame; 609. Displacement sleeve; 610. Limiting block; 611. Locking structure; 6111. Displacement seat; 6112. Stop spring; 6113. Locking rod; 7. Positioning structure; 701. Lower pressure frame; 702. Pressure seat; 703. Protective ring; 704. Second magnetic pole piece; 705. Sink; 706. Blind hole; 707. Guide rod; 708. Limiting spring; 709. Arc plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] Example

[0035] This invention provides a tooling for replacing the oil seal of a speed reducer, such as... Figures 1-8 As shown, this invention aims to solve problems such as inaccurate tooling positioning, cumbersome operation, easy damage to the oil seal, and poor compatibility in the existing gearbox oil seal replacement process. The gearbox oil seal replacement tooling involved in this invention mainly includes a loading housing 1, a cover 3, a shaft 4, a mounting base 2, a fixing structure 5, a positioning structure 6, a locking structure 7, and a drive structure, as detailed below:

[0036] The loading shell 1 is a hollow cylindrical structure with a circular mounting chamber 101 inside. The inner diameter of the mounting chamber 101 is larger than the outer diameter of the reducer's rotating shaft, and it is used to fit and accommodate the reducer's rotating shaft, allowing a portion of the rotating shaft to be embedded within the mounting chamber 101. A mounting base 2 is integrally formed on the outer wall of the loading shell 1. The mounting base 2 has a ring-shaped structure and surrounds the loading shell 1, used to mount the positioning structure 6, providing support for the positioning and guidance of the tooling.

[0037] A cover 3 is detachably mounted on one side of the loading housing 1 via bolts. The journal on the cover 3 protrudes outward from the loading housing 1 and fits tightly against the end face of the loading housing 1. This seals one opening of the mounting chamber 101, preventing dust and debris from entering the mounting chamber 101 during operation, and provides mounting support for the drive structure and the shaft 4. An inlet / outlet hole 301 is provided on the side wall of the cover 3. This inlet / outlet hole 301 is coaxial with the circle of the loading housing 1, ensuring that the shaft 4 can reciprocate along the axial direction of the loading housing 1. The shaft 4 passes through the inlet / outlet hole 301. One end of the shaft 4 extends into the mounting chamber 101 and connects to the fixing structure 5 and the locking structure 7. The other end protrudes outside the cover 3 and connects to the drive structure and the rotating handle 401 to transmit power.

[0038] The mounting chamber 101 is provided with a fixing structure 5 connected to the shaft 4, which is used to realize the detachable connection between the reducer rotating shaft and the shaft 4, and to partially embed the reducer rotating shaft in the fixing structure 5, so as to ensure the relative fixation between the rotating shaft and the shaft 4, and to provide positioning and guidance for the movement of the shaft 4, so as to prevent the rotating shaft from shifting when the shaft 4 moves, which would affect the installation of the oil seal.

[0039] Specifically, the fixed structure 5 includes a mounting shaft 501 slidably disposed within the mounting chamber 101. An inlet / outlet channel 502 is provided on the end face of the mounting shaft 501. A portion of the shaft 4 is embedded within the inlet / outlet channel 502. Synchronous movement of the mounting shaft 501 and the shaft 4 is achieved through a key and a guide groove within the inlet / outlet channel 502. The position can be finely adjusted along the inlet / outlet channel 502 to accommodate rotating shafts of different lengths. A mounting disc 503, coaxial with the mounting shaft 501, is mounted on the outer wall of the mounting shaft 501. Several mounting holes 504 are evenly distributed radially on the outer arc surface of the mounting disc 503. In this embodiment, the preferred number of mounting holes 504 is four, arranged in a ring array. A guide rod 505 is slidably disposed within each mounting hole 504. A fixing plate 506 is fixedly mounted on the extended end of the guide rod 505. The four fixing plates 506 form a ring shape after being surrounded. The inner diameter of the ring structure matches the outer diameter of the reducer's rotating shaft, serving to enclose the rotating shaft. A return spring 507 connected to the guide rod 505 is installed in the mounting hole 504. Preferably, the return spring 507 is sleeved on the outside of the guide rod 505, with one end abutting against the inner wall of the mounting hole 504 and the other end abutting against the end of the guide rod 505, providing radial elastic force to the guide rod 505. Each fixing plate 506 is embedded with a first magnetic pole piece 508, preferably an electro-permanent magnet. When the rotating shaft is made of magnetic material, it can be magnetically attracted, further enhancing the tightness of the fit between the fixing plate 506 and the rotating shaft. If the rotating shaft is made of non-magnetic material, the elastic force of the return spring 507 can achieve clamping and fixing of the rotating shaft by the fixing plate 506.

[0040] The outer wall of the mounting base 2 is provided with a positioning structure 6, which is used to realize the detachable connection between the tooling and the reducer housing, provide a stable reference position for the tooling, and ensure that the shaft 4 is coaxial with the reducer rotating shaft.

[0041] The positioning structure 6 includes several positioning shafts 601. In this embodiment, the number of positioning shafts 601 is preferably three or four, which are arranged in a ring array around the outer wall of the mounting base 2. The axis of the positioning shafts 601 is parallel to the axis of the loading shell 1. The free end of the positioning shaft 601 is embedded in the shaft hole on the reducer housing to achieve initial positioning of the tooling and the reducer housing. The free end of the positioning shaft 601 is provided with a mounting groove 602. The mounting groove 602 is provided with a limiting structure 603 that abuts against the inner wall of the shaft hole. The limiting structure 603 is connected to the shaft rod 4 for transmission, and is used to firmly fix the positioning shaft 601 in the shaft hole.

[0042] Furthermore, the limiting structure 603 includes an airbag structure 6031 installed in the mounting groove 602. The airbag structure 6031 is made of a flexible and wear-resistant material, and has good expandability and repositionability. Limiting seats 6032 are slidably provided on both sides of the mounting groove 602. The outer wall of the limiting seat 6032 is provided with anti-slip threads to increase the engagement with the internal threads on the inner wall of the shaft hole and increase the friction between the two. The airbag structure 6031 is partially embedded between the two limiting seats 6032 and fixedly connected to the two limiting seats 6032. When the airbag structure 6031 inflates, it can push the two limiting seats 6032 to slide outward of the mounting groove 602 and abut against the inner wall of the shaft hole. An installation channel 604 is provided inside the positioning shaft 601, which communicates with the installation groove 602. A connecting rod 605 is slidably arranged inside the installation channel 604. A pressure plate 606 is fixedly arranged on the connecting rod 605, which contacts the airbag structure 6031. The pressure plate 606 is in contact with the end face of the airbag structure 6031 and is used to compress the airbag structure 6031. A slide rail 607 is provided on the outer wall of the positioning shaft 601, which communicates with the installation channel 604. A connecting bracket 608 connected to the connecting rod 605 is slidably arranged inside the slide rail 607. One end of the connecting bracket 608 is fixedly connected to the connecting rod 605, and the other end extends to the outside of the positioning shaft 601 and is rotatably connected to the displacement sleeve 609.

[0043] A displacement sleeve 609 is provided on the outer wall of the shaft 4 and is threadedly connected thereto. A limiting block 610 is provided on the outer wall of the displacement sleeve 609. A limiting groove 302 is provided on the outer wall of the cover 3 in the vertical direction. An arc-shaped groove 303 connected to the limiting groove 302 is provided around the outer wall of the cover 3. The limiting block 610 is partially embedded in the limiting groove 302. When the displacement sleeve 609 moves along the axis of the shaft 4, the limiting block 610 can slide along the limiting groove 302. When the limiting block 610 slides into the arc-shaped groove 303, the displacement sleeve 609 can be mechanically locked to prevent the displacement sleeve 609 from moving accidentally. At this time, after the shaft 4 continues to be screwed into the installation chamber 101 in the threaded direction, the displacement sleeve 609 no longer rotates with the shaft 4. At this time, the displacement sleeve 609 applies lateral pressure to the connecting rod 605 located in the positioning shaft 601 to ensure that the positioning shaft 601 is firmly fixed in the internal threaded hole on the reducer housing.

[0044] In addition, several guide grooves 201 are inclinedly provided on the outer wall of the mounting base 2. The number of guide grooves 201 is the same as the number of positioning shafts 601, which are either 3 or 4. The guide grooves 201 are arranged around the outside of the mounting groove 602. The inclination angle of the guide grooves 201 is adapted to the force direction of the shaft 4 to optimize the force on the shaft 4 and reduce the friction of movement. A sliding seat 202 is slidably provided in the guide groove 201. The shaft 4 passes through the sliding seat 202 and extends outward. The sliding seat 202 guides the shaft 4 and restricts the radial displacement of the shaft 4. The positioning shaft 601 is provided with a locking structure 611 for locking the sliding seat 202 on the mounting base 2 to ensure that the sliding seat 202 does not move during operation and improves the positioning accuracy.

[0045] The locking structure 611 includes a displacement seat 6111 sleeved on the outer wall of the positioning shaft 601. A stop spring 6112 connected to the displacement seat 6111 is sleeved on the outer wall of the positioning shaft 601. One end of the stop spring 6112 abuts against the displacement seat 6111, and the other end abuts against the stepped surface of the positioning shaft 601. Normally, it is in a naturally extended state. A locking rod 6113 is fixedly installed on the displacement seat 6111. The axis of the locking rod 6113 is perpendicular to the axis of the positioning shaft 601. The locking rod 6113 passes through the sliding seat 202 and is embedded in the mounting seat 2, thereby locking the sliding seat 202 and the mounting seat 2. When the displacement seat 6111 is pushed to compress the stop spring 6112, the locking rod 6113 can be pulled out from the mounting seat 2 and the sliding seat 202, releasing the lock.

[0046] The shaft 4 is provided with a locking structure 7 for fixing the oil seal. The fixing structure 5 is located in the annular area formed by the locking structure 7 to avoid interference between the oil seal and the fixing structure 5 during installation, thus ensuring smooth operation.

[0047] The positioning structure 7 includes several lower pressure brackets 701 arranged around the outer wall of the shaft 4. In this embodiment, the number of lower pressure brackets 701 is preferably four, arranged in a ring array. The lower pressure brackets 701 are fixedly connected to the shaft 4. A pressure seat 702 connected to the lower pressure brackets 701 is slidably provided in the mounting chamber 101. The pressure seat 702 has a ring structure and is coaxial with the shaft 4. The lower end of the lower pressure bracket 701 is fixedly connected to the pressure seat 702, driving the pressure seat 702 to move synchronously along the axis of the shaft 4. A protective ring 703 is fixedly installed on the pressure seat 702. The protective ring 703 is ring-shaped and coaxial with the pressure seat 702. A second magnetic pole piece 704 is embedded in the protective ring 703. The second magnetic pole piece 704 is preferably an electromagnet with controllable magnetic force, which facilitates the adsorption and release of the oil seal.

[0048] Furthermore, a groove 705 is formed on the protective ring 703, surrounding the inner wall of the protective ring 703. Blind holes 706 communicating with the groove 705 are formed inside the protective ring 703. The number of blind holes 706 is the same as the number of arc-shaped plates 709; in this embodiment, four are preferably arranged in a ring array. A guide rod 707 is slidably disposed within the blind hole 706. A limiting spring 708 connected to the inner wall of the blind hole 706 is sleeved on the guide rod 707. One end of the limiting spring 708 abuts against the inner wall of the blind hole 706, and the other end abuts against the end of the guide rod 707, providing elasticity to the guide rod 707. An arc-shaped plate 709 is fixedly installed on the extended end of the guide rod 707. The curvature of the arc-shaped plate 709 matches the curvature of the inner wall of the oil seal. The four arc-shaped plates 709 form a ring when enclosed, and the axis of the ring structure is coaxial with the axis of the shaft 4, used for radial limiting and support of the oil seal.

[0049] The cover 3 is equipped with a drive structure for driving the reciprocating motion of the shaft 4, which provides power for pushing and pulling out the oil seal, so as to achieve precise replacement of the oil seal.

[0050] The drive structure includes an internal thread on the inner wall of the inlet / outlet hole 301 and an external thread on the outer wall of the shaft 4 that meshes with the internal thread. The internal and external threads cooperate to form a helical transmission mechanism, converting the rotational motion of the shaft 4 into linear motion along the axial direction. A rotating handle 401 is fixedly installed on the side of the shaft 4 away from the mounting base 2. The rotating handle 401 is cross-shaped and has anti-slip texture on its surface, making it easy for operators to grip and operate. It also increases the rotational lever arm, reduces the operating force, and improves the ease of operation.

[0051] The assembly and use process of the gearbox oil seal replacement fixture in this embodiment is as follows.

[0052] First, the fixing structure 5 is assembled in the mounting chamber 101: the mounting shaft 501 is slidably set in the mounting chamber 101 of the loading shell 1, one end of the shaft 4 is embedded in the inlet / outlet channel 502 of the mounting shaft 501, and the mounting shaft 501 and the shaft 4 are connected by a key to achieve synchronous movement of the two; the guide rod 505 is slidably installed in the mounting hole 504 of the mounting plate 503, a return spring 507 is installed in the mounting hole 504, and the fixing plate 506 is fixed to the extension end of the guide rod 505 to ensure that the first magnetic pole piece 508 in the fixing plate 506 is installed in place, thus completing the assembly of the fixing structure 5.

[0053] Assemble the positioning structure 7: Fix the lower pressure frame 701 around the outer wall of the shaft 4, slide the pressure seat 702 in the mounting chamber 101 and fix it to the lower pressure frame 701; install the protective ring 703 on the pressure seat 702, and ensure that the second magnetic pole piece 704 embedded in the protective ring 703 is installed in place; slide the guide rod 707 in the blind hole 706 of the protective ring 703, install the limiting spring 708 in the blind hole 706, and fix the arc plate 709 to the extension end of the guide rod 707 to complete the assembly of the positioning structure 7.

[0054] Assemble the positioning structure 6 and drive structure: The positioning shaft 601 is mounted around the outer wall of the mounting base 2. The airbag structure 6031 and the limiting seat 6032 are installed in the mounting groove 602 at the free end of the positioning shaft 601. The connecting rod 605 and the pressure plate 606 are installed in the mounting channel 604 of the positioning shaft 601. The connecting bracket 608 is fixedly connected to the connecting rod 605 and rotatably connected to the displacement sleeve 609. The displacement sleeve 609 is threaded onto the shaft 4, ensuring that the limiting block 610 on the displacement sleeve 609 is embedded in the cover. The sliding seat 202 is installed in the guide groove 201 of the mounting seat 2. The displacement seat 6111, the stop spring 6112, and the locking rod 6113 of the locking structure 611 are installed in place to complete the assembly of the positioning structure 6. The cover 3 is installed on one side of the loading shell 1 by bolts to ensure that the shaft 4 passes through the inlet and outlet hole 301 of the cover 3 and the internal thread of the inlet and outlet hole 301 is tightly engaged with the external thread of the shaft 4. The rotating handle 401 is fixedly installed on the exposed end of the shaft 4 to complete the assembly of the entire tooling.

[0055] Oil seal replacement operation

[0056] Tooling positioning and fixing: The loading shell 1 is sleeved onto the rotating shaft of the reducer through the mounting chamber 101, so that part of the rotating shaft is embedded in the mounting chamber 101; the position of the positioning shaft 601 is adjusted, and the free end of the positioning shaft 601 is embedded into the shaft hole on the reducer housing to achieve the initial positioning of the tooling; the sliding seat 202 is pushed to slide along the guide groove 201, and the sliding seat 202 is adjusted to a suitable position so that the shaft 4 passes through the sliding seat 202 and is stably guided, the displacement seat 6111 is pushed to compress the resistance spring 6112, and the locking rod 6113 passes through the sliding seat 202 and is embedded in the mounting seat 2 to lock and fix the sliding seat 202.

[0057] Rotary shaft fixing: Partially embed the rotary shaft of the reducer into the annular area formed by several fixing plates 506. At this time, the return spring 507 is in a naturally extended state, and the fixing plates 506 are not in contact with the rotary shaft. If the rotary shaft is made of magnetic material, the first magnetic pole 508 generates magnetic force to attract the rotary shaft, driving the guide rod 505 to move radially outward along the mounting hole 504. The fixing plate 506 is tightly attached to the outer wall of the rotary shaft, and the return spring 507 is compressed. If the rotary shaft is made of non-magnetic material, the guide rod 505 is manually pushed to make the fixing plate 506 fit against the rotary shaft. The return spring 507 is used to clamp and fix the rotary shaft, thus completing the relative fixation of the rotary shaft and the shaft 4.

[0058] Oil seal fixing: Place the oil seal to be replaced on the shaft 4, adjust the position of the oil seal so that it is located inside the protective ring 703 and the inner wall of the oil seal is in contact with the arc plate 709; activate the second magnetic pole 704, and use magnetic force to attract and fix the oil seal on the protective ring 703. At the same time, the oil seal squeezes the arc plate 709, causing the guide rod 707 to slide along the blind hole 706. The limiting spring 708 is compressed, and the arc plate 709 is tightly fitted to the inner wall of the oil seal under the elastic force of the limiting spring 708, realizing the radial positioning of the oil seal; the lower pressure frame 701 plays a limiting role on the top of the oil seal to prevent the oil seal from axially shifting or falling off during the movement.

[0059] Limit Locking: Hold the rotating handle 401 and rotate the shaft 4 clockwise (adjust according to the thread direction). The shaft 4 drives the displacement sleeve 609 to move into the installation chamber 101 along the axis of the shaft 4 via thread transmission. The displacement sleeve 609 drives the connecting frame 608 to slide along the slide 607 of the positioning shaft 601. The connecting frame 608 drives the connecting rod 605 to slide in the installation channel 604. The pressure plate 606 on the connecting rod 605 squeezes the airbag structure 6031. The airbag structure 6031 expands under pressure, pushing the limit seats 6032 on both sides to slide outward of the installation groove 602 until the limit seats 6032 are tightly abutted against the inner wall of the shaft hole. At the same time, the limit block 610 on the displacement sleeve 609 slides along the limit groove 302 of the cover 3 into the arc groove 303, realizing the mechanical locking of the displacement sleeve 609, thereby firmly fixing the positioning shaft 601 in the shaft hole and completing the final positioning of the tooling.

[0060] Oil seal push / pull: Continue to rotate the rotary handle 401, drive shaft 4 moves into the mounting chamber 101 along the axial direction, shaft 4 drives the lower pressure frame 701, pressure seat 702, and protective ring 703 to move synchronously, protective ring 703 drives the oil seal fixed on it to move smoothly along the axis of the rotating shaft, pushing the oil seal to the preset installation position of the rotating shaft; if it is necessary to remove the old oil seal, rotate the rotary handle 401 in the opposite direction, drive shaft 4 to move outward of the mounting chamber 101, drive the locking structure 7 to pull the old oil seal out of the rotating shaft, and complete the removal of the old oil seal.

[0061] Tooling disassembly and resetting: After the oil seal replacement is completed, rotate the handle 401 in the reverse direction, causing the displacement sleeve 609 to move in the reverse direction. The connecting bracket 608 and connecting rod 605 move in the reverse direction simultaneously. The pressure plate 606 releases the pressure on the airbag structure 6031, the airbag structure 6031 resets, and the limiting seat 6032 retracts into the mounting groove 602, separating from the inner wall of the shaft hole. At the same time, the limiting block 610 slides from the arc groove 303 back into the limiting groove 302, releasing the locking of the displacement sleeve 609. The displacement seat 6111 is released, and the stop spring 6112... Reset the device, causing the locking rod 6113 to be pulled out, releasing the lock of the sliding seat 202; release the magnetic force of the first magnetic pole piece 508 (if it is a magnetic rotating shaft), and the reset spring 507 pushes the guide rod 505, the fixing plate 506 to separate from the rotating shaft; close the second magnetic pole piece 704, and manually push the oil seal to separate from the protective ring 703 and the arc plate 709; remove the cover 3, remove the loading shell 1 from the rotating shaft, and push the sliding seat 202, displacement sleeve 609 and other components to reset, completing the disassembly and storage of the tooling for future use.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tooling for replacing the oil seal of a speed reducer, characterized in that, The device includes a loading shell, which has an installation chamber for housing the rotating shaft of the speed reducer. An installation seat is installed on the outer wall of the loading shell. A cover is installed on one side of the loading shell, and an inlet / outlet hole coaxial with the circle of the loading shell is opened on the side wall of the cover, and a shaft is inserted through the inlet / outlet hole; The mounting cavity is provided with a fixing structure connected to the shaft. The fixing structure is detachably connected to the reducer rotating shaft, and a portion of the reducer rotating shaft is embedded in the fixing structure. The outer wall of the mounting base is provided with a positioning structure, which is detachably connected to the reducer housing, and the shaft is drivenly connected to the positioning structure. The shaft is provided with a locking structure for fixing the oil seal; the fixing structure is located within the annular area formed by the locking structure; the cover is provided with a driving structure for driving the shaft to reciprocate.

2. The gearbox oil seal replacement fixture according to claim 1, characterized in that, The positioning structure includes several positioning shafts, which are mounted around the outer wall of the mounting base. The free end of each positioning shaft is embedded in a shaft hole on the reducer housing. The free end of each positioning shaft has a mounting groove, and a limiting structure that abuts against the inner wall of the shaft hole is provided in the mounting groove. The limiting structure is connected to the shaft drive.

3. The gearbox oil seal replacement fixture according to claim 2, characterized in that, The limiting structure includes an airbag structure installed in the mounting groove. Limiting seats are slidably provided on both sides of the mounting groove. A portion of the airbag structure is embedded between the two limiting seats. An installation channel is opened in the positioning shaft. A connecting rod is slidably provided in the installation channel. A pressure plate that contacts the airbag structure is provided on the connecting rod. A slide rail is opened on the outer wall of the positioning shaft. A connecting frame connected to the connecting rod is slidably provided in the slide rail. A displacement sleeve is provided on the outer wall of the shaft and threadedly connected thereto. The connecting frame and the displacement sleeve are rotatably connected. A limiting groove is opened vertically on the outer wall of the cover. An arc-shaped groove connected to the limiting groove is opened around the outer wall of the cover. A limiting block is provided on the outer wall of the displacement sleeve. A portion of the limiting block is embedded in the limiting groove.

4. A gearbox oil seal replacement fixture according to claim 2 or 3, characterized in that, The outer wall of the mounting base is provided with several guide grooves at an angle, and the guide grooves are arranged around the outer side of the mounting groove. A sliding seat is slidably arranged in the guide groove. The shaft extends outward after passing through the sliding seat. The positioning shaft is provided with a locking structure for locking the sliding seat on the mounting base.

5. The gearbox oil seal replacement fixture according to claim 4, characterized in that, The locking structure includes a displacement seat sleeved on the outer wall of the positioning shaft, a stop spring sleeved on the outer wall of the positioning shaft and connected to the displacement seat, a locking rod installed on the displacement seat, and the locking rod passing through the sliding seat and embedded in the mounting seat.

6. The gearbox oil seal replacement fixture according to claim 1, characterized in that, The fixing structure includes a mounting shaft that is slidably disposed in the mounting cavity, and an inlet / outlet channel is provided on the end face of the mounting shaft, with a portion of the shaft rod being embedded in the inlet / outlet channel; A mounting plate coaxial with the mounting shaft is mounted on the outer side wall of the mounting shaft. Several mounting holes are opened radially on the outer arc surface of the mounting plate. A guide rod is slidably installed in each mounting hole. A fixing plate is installed on the extended end of the guide rod. Several fixing plates are arranged in a ring shape after being surrounded. A return spring connected to the guide rod is installed in the mounting hole. A first magnetic pole element is embedded in each fixing plate.

7. The gearbox oil seal replacement fixture according to claim 1, characterized in that, The positioning structure includes several lower pressure frames surrounding the outer side wall of the shaft. A pressure seat is slidably provided in the mounting cavity and fixedly connected to the end of the lower pressure frame. A protective ring is installed on the pressure seat, and a second magnetic pole piece is embedded in the pressure seat.

8. A gearbox oil seal replacement fixture according to claim 7, characterized in that, It also includes a groove formed on the protective ring, a blind hole communicating with the groove is formed in the protective ring, a guide rod is slidably arranged in the blind hole, a limiting spring connected to the inner wall of the blind hole is sleeved on the guide rod, an arc plate is installed on the extended end of the guide rod, and several arc plates form a ring after being surrounded, and the axis of the circle in which the arc plate is located is coaxial with the axis of the shaft.

9. A gearbox oil seal replacement fixture according to claim 1, characterized in that, The drive structure includes an internal thread formed on the inner wall of the mounting hole, and an external thread that engages with the internal thread is formed on the outer wall of the shaft.

10. A gearbox oil seal replacement fixture according to claim 9, characterized in that, A rotating handle is installed on the side of the shaft opposite to the mounting base.

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