A device for dismounting an oil seal

Abstract

The application relates to an oil seal dismounting device which comprises a base, a pawl, a connecting rod, a sliding piece and a positioning piece; the sliding piece is slidably arranged on the base, one end of the pawl is hinged to the base, the other end of the pawl is provided with an abutting part, one end of the connecting rod is hinged to the pawl, the other end of the connecting rod is hinged to the sliding piece, and the sliding piece drives the pawl to rotate through the connecting rod; the abutting part forms an abutting area around the base axis, and the positioning piece fixes the sliding piece at different positions on the base to adjust the diameter of the abutting area. The application adjusts the position of the sliding piece on the base to adjust the diameter of the abutting area formed by the abutting part around the base axis, so that the oil seal of different diameters can be adapted, the oil seal of different diameters can be dismounted, and the universality of the oil seal dismounting device is improved.

Description

Technical Field

[0001] This application relates to the field of oil seal disassembly technology, and in particular to an oil seal disassembly device. Background Technology

[0002] Oil seals are installed in vehicle engine crankshafts, transmissions, and differentials to isolate lubricated components from the external environment and prevent lubricant leakage. During subsequent vehicle maintenance, oil seals are frequently disassembled. Existing oil seal removal mechanisms are only compatible with single-size oil seals and cannot accommodate oil seals of various diameters, resulting in low versatility of oil seal removal devices. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides an oil seal disassembly device that can be adapted to oil seals of different diameters, thereby improving the versatility of the oil seal disassembly device.

[0004] This application provides an oil seal disassembly device, including a base, a pawl, a connecting rod, a sliding member, and a positioning member; the sliding member is slidably disposed on the base, one end of the pawl is hinged to the base, and the other end of the pawl has an abutment portion, one end of the connecting rod is hinged to the pawl, and the other end of the connecting rod is hinged to the sliding member, the sliding member drives the pawl to rotate through the connecting rod; the abutment portion forms an abutment area around the axis of the base, and the positioning member fixes the sliding member at different positions on the base to adjust the diameter of the abutment area.

[0005] In one embodiment of this application, the positioning member is connected to the sliding member. The positioning member is an adjusting nut, which is threadedly connected to the outer edge of the base. The adjusting nut is rotated to different positions on the outer edge of the base, so that the sliding member is fixed at different positions on the base along the axial direction of the base.

[0006] In one embodiment of this application, the oil seal disassembly device further includes a limiting member disposed on the sliding member, the sliding member having a limiting groove, a limiting cavity being formed between the limiting member and the limiting groove, a positioning ring disposed on the positioning member, the positioning ring being rotatably disposed within the limiting cavity around its axis, and the limiting member constraining the sliding freedom of the positioning ring relative to the sliding member along the axial direction of the base.

[0007] In one embodiment of this application, the oil seal disassembly device further includes a positioning housing and a screw. The screw is rotatably mounted on the positioning housing about its axis. The screw has only rotational freedom about its axis relative to the positioning housing. A first threaded hole is provided at one end of the base near the screw. The screw is threaded into the first threaded hole. The axes of the screw and the first threaded hole both extend axially along the base. An abutment end is provided on the positioning housing.

[0008] In one embodiment of this application, the base includes a first end, a sliding portion, a threaded portion, and a second end arranged sequentially. A second hinge portion is provided on the first end, the pawl is hinged to the second hinge portion, the sliding member is slidably disposed on the sliding portion, the adjusting nut is threadedly connected to the threaded portion, and the first threaded hole extends from the second end toward the first end.

[0009] In one embodiment of this application, the pawl includes a third end, an intermediate connecting portion, and a fourth end arranged sequentially. The third end is hinged to the first end, the abutting portion is disposed at the fourth end, and one end of the connecting rod that is hinged to the pawl is hinged to the intermediate connecting portion.

[0010] In one embodiment of this application, the fourth end is bent along the axial direction of the base and toward the second end to form a bent portion, and the abutment portion is disposed on the bent portion.

[0011] In one embodiment of this application, the sliding member includes a sliding body and a first hinge portion. The sliding body is sleeved on the sliding portion, such that the sliding body is slidably disposed on the sliding portion along the axial direction of the base. One end of the connecting rod that is hinged to the sliding member is hinged to the first hinge portion.

[0012] In one embodiment of this application, a pawl, a second hinge, a connecting rod, and a first hinge form an adjustment and disassembly assembly. Several adjustment and disassembly assemblies are provided, and the several adjustment and disassembly assemblies are arranged circumferentially around the base axis.

[0013] In one embodiment of this application, the base is provided with scale lines and data labels, and the positioning element is provided with a reference surface. The scale lines, the data labels, and the reference surface cooperate to indicate the diameter of the contact area.

[0014] The technical solution described in this application has the following advantages over the prior art: When the sliding component of the oil seal disassembly device of this application slides, the sliding component can drive the pawl to rotate around it via the connecting rod, thereby causing the abutting part on the pawl to move closer to or further away from the base axis, thus adjusting the diameter of the abutting area formed by the abutting part around the base axis, so that the abutting area can be adapted to oil seals of different diameters. This allows the oil seal disassembly device of this application to disassemble oil seals of different diameters, improving the versatility of the oil seal disassembly device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the oil seal disassembly device of this application (Example 1); Figure 2 This is a perspective view of the oil seal disassembly device of this application (Example 1); Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is an exploded view of the connecting rod and pawl of the oil seal removal device of this application (Example 1); Figure 5 This is a schematic diagram of the assembly structure of the oil seal removal device and the gearbox housing of this application (Example 1); Figure 6 yes Figure 5 A magnified view of a portion of point B in the middle; Figure 7 This is a schematic diagram of the screw, third through hole, and second threaded hole of the oil seal removal device of this application (Example 1). Figure 8 This is a schematic diagram of the second structure of the oil seal removal device of this application, including the screw, the third through hole, and the second threaded hole (Example 1). Figure 9 This is a cross-sectional view of the oil seal removal device of this application (Example 2); Figure 10 yes Figure 9 A magnified view of a portion of point C in the middle; Figure 11 This is a schematic diagram of the assembly structure of the oil seal removal device and the gearbox housing of this application (Example 2); Figure 12 This is a schematic diagram of the structure of the oil seal disassembly device of this application (Example 2).

[0017] Explanation of reference numerals on the accompanying drawings: 1. Base; 2. Pawl; 3. Connecting rod; 4. Sliding component; 5. Positioning component; 6. Abutment part; 7. Limiting component; 8. Limiting groove; 9. Limiting cavity; 10. Positioning ring; 11. Positioning housing; 12. Screw; 13. First threaded hole; 14. Abutment end; 15. First end; 16. Sliding part; 17. Threaded part; 18. Second end; 19. Third end; 20. Intermediate connecting part; 21. Fourth end; 22. Sliding body; 23. First hinge part; 24. First through hole; 25. First side plate; 26. First hinge groove; 27. First pin hole; 28. First... 29. Second side plate; 30. Second hinge groove; 31. Second pin hole; 32. Second pin; 33. Third side plate; 34. Third hinge groove; 35. Third pin; 36. Third pin hole; 37. Fourth pin hole; 38. Fifth pin hole; 39. Sixth pin hole; 40. Second through hole; 41. Positioning boss; 42. Positioning groove; 43. First assembly; 44. Second assembly; 45. Gearbox housing; 46. Annular groove; 47. Second threaded hole; 48. Third through hole; 49. Screw; 50. Oil seal; 51. Reference surface; 52. Second hinge part. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Example 1 The oil seal removal device of this application, such as Figure 1 As shown, it includes a base 1, a pawl 2, a connecting rod 3, a sliding member 4, and a positioning member 5.

[0020] like Figure 1 As shown, the base 1 includes a first end 15, a sliding portion 16, a threaded portion 17, and a second end 18 arranged sequentially. Figure 2 and Figure 3 As shown, the first end 15 has a second hinge portion 52, and four second hinge portions 52 are provided. The four second hinge portions 52 are evenly arranged around the axis of the base 1.

[0021] like Figure 2 and Figure 3As shown, the sliding member 4 includes a sliding body 22 and a first hinge portion 23. The outer edge of the sliding body 22 is cylindrical. The first hinge portion 23 is disposed on the outer edge of the sliding body 22, and four first hinge portions 23 are disposed, which are evenly arranged circumferentially around the axis of the sliding member 4. A first through hole 24 is provided in the middle of the sliding body 22. The first through hole 24 extends along the axial direction of the sliding body 22 and penetrates the sliding body 22 along the axial direction. The axis of the first through hole 24 coincides with the axis of the sliding body 22. The sliding member 4 is sleeved on the sliding portion 16 of the base 1 through the first through hole 24, so that the sliding member is slidably disposed on the sliding portion 16 along the axial direction of the base 1.

[0022] like Figure 1 As shown, the ratchet 2 includes a third end 19, an intermediate connecting portion 20, and a fourth end 21 arranged sequentially. The fourth end 21 is bent along the axial direction of the base 1 and toward the second end 18 to form a bent portion. The ratchet 2 has an abutment portion 6, which is used to abut against the oil seal 50, so that the oil seal 50 can be removed from the gearbox housing 45 through the abutment portion 6. The abutment portion 6 is provided at the bent portion, and the bent portion facilitates the abutment portion 6 to extend into the annular groove 46 of the oil seal 50. Figure 2 and Figure 3 As shown, four pawls 2 are provided, and the four pawls 2 are evenly arranged around the axis of the sliding member 4. In order to prevent the abutment part 6 from damaging the oil seal 50, a rubber pad (not shown in the figure) is provided on the abutment part 6. When the abutment part 6 abuts against the oil seal 50, the rubber pad is placed between the abutment part 6 and the oil seal 50 to protect the oil seal 50.

[0023] like Figure 3 and Figure 4 As shown, the second hinge portion 52 of the base 1 is provided with two second side plates 29, and a second hinge groove 30 is formed between the two second side plates 29. The two second side plates 29 are provided with second pin holes 31, and a second pin 32 is inserted into the two second pin holes 31. The third end 19 of the pawl 2 is provided with a third pin hole 36. The third end 19 of the pawl 2 is inserted into the second hinge groove 30. The second pin 32 is simultaneously inserted into the second pin hole 31 and the third pin hole 36, thereby achieving the hinge between the pawl 2 and the base 1 through the second pin 32.

[0024] like Figure 3 and Figure 4As shown, the first hinge portion 23 of the sliding member 4 is provided with two first side plates 25, and a first hinge groove 26 is formed between the two first side plates 25. The two first side plates 25 are provided with first pin holes 27, and a first pin 28 is inserted into the two first pin holes 27. The end of the connecting rod 3 that is hinged to the sliding member 4 is provided with a fourth pin hole 37. The end of the connecting rod 3 that is hinged to the sliding member 4 is inserted into the first hinge groove 26. The first pin 28 is simultaneously inserted into the first pin hole 27 and the fourth pin hole 37, thereby realizing the hinge between the sliding member 4 and the connecting rod 3.

[0025] like Figure 4 As shown, the middle connecting part 20 of the pawl 2 is provided with two third side plates 33, and a third hinge groove 34 is formed between the two third side plates 33. The two third side plates 33 are provided with fifth pin holes 38, and a third pin 35 is inserted into the two fifth pin holes 38. The end of the connecting rod 3 that is hinged to the pawl 2 is provided with a sixth pin hole 39. The end of the connecting rod 3 that is hinged to the pawl 2 is inserted into the third hinge groove 34. The third pin 35 is simultaneously inserted into the fifth pin hole 38 and the sixth pin hole 39, thereby realizing the hinge between the pawl 2 and the connecting rod 3.

[0026] The axes of the first pin 28, the second pin 32, and the third pin 35 are arranged in parallel to ensure the normal transmission of the linkage mechanism formed by the component, the connecting rod 3, and the pawl 2.

[0027] A pawl 2, a second hinge 52, a connecting rod 3, and a first hinge 23 form an adjustment and disassembly assembly. Several adjustment and disassembly assemblies are arranged circumferentially around the axis of the base 1. Each pawl 2 is provided with an abutment 6. Therefore, the four adjustment and disassembly assemblies have a total of four abutment 6s. The four abutment 6s are arranged circumferentially around the axis of the base 1 to form an abutment area. When the oil seal 50 is disassembled using the oil seal disassembly device of this application, the abutment area abuts against the oil seal 50, so that the oil seal 50 can be removed from the gearbox housing 45 by relying on the abutment force of the abutment area against the oil seal 50.

[0028] Since the sliding member 4 is slidably disposed on the sliding part 16 on the base 1 along the axial direction of the base 1, the sliding member 4 can slide to different positions along the axial direction of the base 1. When the sliding member 4 slides on the base 1, the sliding member 4 drives the connecting rod 3 to slide. Since the sliding member 4 is hinged to the pawl 2 through the connecting rod 3, when the sliding member 4 slides, the sliding member 4 can drive the pawl 2 to rotate around the second pin 32 through the connecting rod 3, so that the third end 19 of the pawl 2 is closer to or farther away from the axis of the base 1, and thus the abutting part 6 is closer to or farther away from the axis of the base 1, thereby adjusting the diameter of the abutting area formed by the abutting part 6 around the axis of the base 1, so that the abutting area can be adapted to oil seals 50 of different diameters, so that the oil seal disassembly device of this application can disassemble oil seals 50 of different diameters, improving the versatility of the oil seal disassembly device.

[0029] The positioning element 5 is used to position the sliding element 4 on the base 1, thereby limiting the sliding element 4 on the base 1. The positioning element 5 is an adjusting nut, and an adjusting thread is provided on the threaded portion 17. The adjusting nut is threaded onto the adjusting thread, so when the adjusting nut rotates on the base 1, the adjusting nut has the freedom of sliding along the axial direction of the base 1. Figure 1 As shown, the pawl 2, connecting rod 3, sliding member 4, and positioning member 5 are arranged sequentially along the axial direction of the base 1. A limiting groove 8 and a limiting member 7 are provided on the sliding member 4 near the positioning member 5, as shown... Figure 5 and Figure 6 As shown, the limiting member 7 is connected to the end of the sliding member 4, and a limiting cavity 9 is formed between the limiting member 7 and the limiting groove 8. A positioning ring 10 is provided on the end of the positioning member 5 near the sliding member 4, and the positioning ring 10 is located in the limiting cavity 9. When the positioning member 5 rotates, the positioning ring 10 rotates in the limiting cavity 9. Due to the presence of the limiting member 7, the limiting member 7 restricts the sliding freedom of the positioning ring 10 relative to the sliding member 4 along the axial direction of the base 1. Therefore, the positioning ring 10 cannot disengage from the cavity, and the positioning ring 10 only has the rotational freedom to rotate around its own axis relative to the sliding member 4. The positioning ring 10 cannot move axially relative to the sliding member 4. When the positioning member 5 rotates on the base 1, that is, when the adjusting nut rotates on the adjusting thread, the rotational motion of the positioning member 5 is converted into the sliding freedom of the positioning member 5 along the axial direction of the base 1 through the cooperation of the positioning ring 10 and the positioning cavity. The positioning member 5 drives the sliding member 4 to slide along the axial direction of the base 1 through the cooperation of the positioning ring 10 and the limiting cavity 9. Since the positioning element 5 and the base 1 are connected by a thread, when there is no external force to rotate the positioning element 5, the self-locking effect of the thread achieves the axial positioning of the positioning element 5 relative to the base 1, which in turn achieves the axial positioning of the sliding element 4 relative to the base 1, and further achieves the positioning of the pawl 2 relative to the base 1, so as to fix the diameter of the contact area. Therefore, the cooperation between the positioning ring 10 and the limiting cavity 9 not only achieves the axial position adjustment of the sliding element 4, but also achieves the axial positioning of the sliding element 4 along the base 1.

[0030] In one implementation, such as Figure 7 and Figure 8 As shown, a second threaded hole 47 is provided on the base 1, extending radially along the base 1. Several second threaded holes 47 are provided and evenly arranged axially along the base 1. Similarly, a third through hole 48 is provided on the sliding member 4, extending radially along the base 1 and penetrating the sidewall of the sliding member 4. The oil seal removal device also includes a screw 49, which passes through the third through hole 48 on the sliding member 4 and is threadedly connected to the second threaded hole 47 on the base 1, thereby positioning the sliding member 4 relative to the base 1. When it is necessary to reduce the diameter of the contact area, the sliding member 4 is moved to the right so that the third through hole 48 on the sliding member 4 is aligned with the corresponding second threaded hole 47, and the screw 49 is threaded into the corresponding second threaded hole 47. Figures 7 to 8 As shown.

[0031] In one embodiment, the base 1 is provided with scale lines and data labels. The data labels display the data corresponding to the scale lines. The data is the diameter of the abutment area corresponding to the current scale. The end face of the slider 4 away from the positioning member 5 serves as the reference surface 51. When the reference surface 51 is aligned with the scale line, it indicates that the diameter of the abutment area is the data label of the current scale line corresponding to the reference surface 51. This facilitates maintenance personnel in adjusting the diameter of the abutment area and improves disassembly efficiency.

[0032] Specific workflow and principles (in) Figure 5 (Taking the direction shown as an example) The base 1, positioning element 5, sliding element 4, connecting rod 3, and pawl 2 of this application constitute the first component 43. For example... Figure 5 As shown, the oil seal 50 is installed inside the gearbox housing 45.

[0033] First, adjust the diameter of the abutment area formed by the abutment part 6 around the axis of the base 1 according to the diameter of the annular groove 46 of the oil seal 50, so that the diameter of the abutment area matches the diameter of the annular groove 46 of the oil seal 50, that is, the abutment area is inserted into the annular groove 46, so that the abutment area abuts against the bottom of the annular groove 46. Specifically, rotate the positioning member 5, which drives the sliding member 4 to slide along the axis of the base 1. The sliding member 4 drives the pawl 2 to rotate through the connecting rod 3, thereby making the abutment part 6 move closer to or further away from the axis of the base 1. When the diameter of the abutment area matches the diameter of the annular groove 46, stop rotating the positioning member 5. The positioning member 5 is positioned by the threaded connection between the positioning member 5 and the base 1, thereby positioning the sliding member 4 relative to the base 1.

[0034] The second end 18 (rightmost end) of the movable base 1 is moved so that the second end 18 of the base 1 passes through the inner hole of the oil seal 50 from the left side and abuts the abutting area against the bottom of the annular groove 46 of the oil seal 50, that is, the abutting area abuts against the bottom of the annular groove 46 of the oil seal 50; then the second end 18 of the base 1 is moved to the right, the base 1 drives the pawl 2 to move to the right, and the abutting area drives the oil seal 50 to move to the right until the oil seal 50 is disengaged from the gearbox housing 45.

[0035] Example 2 like Figure 9 and Figure 10 As shown, the oil seal disassembly device of this application includes the technical solution described in Embodiment 1, a positioning housing 11, and a screw 12. The technical solution described in Embodiment 1 is described in the Embodiment 1 section and will not be repeated here.

[0036] The base 1 is provided with a first threaded hole 13. The first threaded hole 13 extends from the end face of the second end 18 along the axial direction of the base 1 and toward the first end 15. The axis of the first threaded hole 13 coincides with the axis of the base 1.

[0037] The axes of the positioning housing 11, screw 12, base 1, first threaded hole 13, positioning member 5, and sliding member 4 coincide. A second through hole 40 is provided on the positioning housing 11, and the axis of the second through hole 40 coincides with the axis of the positioning housing 11. The screw 12 passes through the second through hole 40 to facilitate rotation of the screw 12 around its own axis on the positioning housing 11. Furthermore, a positioning boss 41 extends radially inward on the inner wall of the second through hole 40, and a positioning groove 42 is recessed radially inward on the outer edge of the screw 12. The positioning boss 41 engages within the positioning groove 42, constraining the sliding freedom of the positioning groove 42 along the axis of the second through hole 40, so that the screw 12 only has rotational freedom around its own axis. An abutment end 14 is provided at the end of the positioning housing 11 away from the second through hole 40, and the abutment end 14 abuts against the gearbox housing 45. The screw 12 has a head, which is rotated by a wrench, thereby rotating the screw 12.

[0038] Specific workflow and principles (in) Figure 11 (Taking the direction shown as an example) like Figure 12 As shown, the base 1, positioning element 5, sliding element 4, connecting rod 3, and pawl 2 of this application constitute the first component 43, and the positioning housing 11 and screw 12 constitute the second component 44. The first component 43 and the second component 44 are used together, as shown in the diagram. Figure 12 As shown. The oil seal 50 is installed inside the gearbox housing 45, as... Figure 11 As shown.

[0039] First, adjust the diameter of the abutment area formed by the abutment part 6 around the axis of the base 1 according to the diameter of the annular groove 46 of the oil seal 50, so that the diameter of the abutment area matches the diameter of the annular groove 46 of the oil seal 50, that is, the abutment area is inserted into the annular groove 46, so that the abutment area abuts against the bottom of the annular groove 46. Specifically, rotate the positioning member 5, which drives the sliding member 4 to slide along the axis of the base 1. The sliding member 4 drives the pawl 2 to rotate through the connecting rod 3, thereby making the abutment part 6 move closer to or further away from the axis of the base 1. When the diameter of the abutment area matches the diameter of the annular groove 46, stop rotating the positioning member 5. The positioning member 5 is positioned by the threaded connection between the positioning member 5 and the base 1, thereby positioning the sliding member 4 relative to the base 1.

[0040] The second end 18 (rightmost end) of the movable base 1 is moved so that the second end 18 of the base 1 passes through the inner hole of the oil seal 50 from the left side and abuts the abutting area against the bottom of the annular groove 46 of the oil seal 50, that is, the abutting area abuts against the bottom of the annular groove 46 of the oil seal 50; then the second component 44 is moved so that the screw 12 of the second component 44 is screwed into the first threaded hole 13 on the base 1, and the screw 12 is rotated to move the positioning housing 11 closer to the gearbox housing 45, and finally the abutting end 14 on the positioning housing 11 abuts against the gearbox housing 45.

[0041] Continue rotating the screw 12. Under the contact action between the gearbox housing 45 and the positioning housing 11, the rotational motion of the screw 12 is converted into the axial movement of the base 1, causing the base 1 to move to the right. The base 1 drives the pawl 2 to move to the right, and the contact area formed by the contact part 6 drives the oil seal 50 to move to the right until the oil seal 50 is disengaged from the gearbox housing 45.

[0042] It should be noted that the above are merely preferred embodiments and technical principles applied in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Under the circumstances of the concept and disclosed technical solutions of this application, other equivalent embodiments or equivalent technical means may also be included, all of which fall within the scope of protection of the claims of this application.

Claims

1. An oil seal disassembly device, characterized in that: The system includes a base (1), a pawl (2), a connecting rod (3), a sliding member (4), and a positioning member (5). The sliding member (4) is slidably disposed on the base (1). One end of the pawl (2) is hinged to the base (1), and the other end of the pawl (2) has an abutment portion (6). One end of the connecting rod (3) is hinged to the pawl (2), and the other end of the connecting rod (3) is hinged to the sliding member (4). The sliding member (4) drives the pawl (2) to rotate through the connecting rod (3). The abutment portion (6) forms an abutment area around the axis of the base (1). The positioning member (5) fixes the sliding member (4) to different positions on the base (1) to adjust the diameter of the abutment area.

2. The oil seal disassembly device according to claim 1, characterized in that: The positioning element (5) is connected to the sliding element (4). The positioning element (5) is an adjusting nut. The adjusting nut is threaded to the outer edge of the base (1). The adjusting nut is rotated to different positions on the outer edge of the base (1), so that the sliding element (4) is fixed to different positions on the base (1) along the axial direction of the base (1).

3. The oil seal disassembly device according to claim 2, characterized in that: The oil seal disassembly device further includes a limiting member (7), which is disposed on the sliding member (4). The sliding member (4) is provided with a limiting groove (8), and a limiting cavity (9) is formed between the limiting member (7) and the limiting groove (8). A positioning ring (10) is provided on the positioning member (5), and the positioning ring (10) is rotatably disposed in the limiting cavity (9) around its axis. The limiting member (7) restricts the sliding freedom of the positioning ring (10) relative to the sliding member (4) along the axial direction of the base (1).

4. The oil seal disassembly device according to claim 2, characterized in that: The oil seal disassembly device further includes a positioning housing (11) and a screw (12). The screw (12) is rotatably mounted on the positioning housing (11) around its axis. The screw (12) has only rotational freedom around its axis relative to the positioning housing (11). The base (1) has a first threaded hole (13) at one end near the screw (12). The screw (12) is threaded into the first threaded hole (13). The axes of the screw (12) and the first threaded hole (13) both extend axially along the base (1). The positioning housing (11) has an abutment end (14).

5. The oil seal disassembly device according to claim 4, characterized in that: The base (1) includes a first end (15), a sliding part (16), a threaded part (17), and a second end (18) arranged sequentially. A second hinge part (52) is provided on the first end (15). The pawl (2) is hinged to the second hinge part (52). The sliding member (4) is slidably disposed on the sliding part (16). The adjusting nut is threadedly connected to the threaded part (17). The first threaded hole (13) extends from the second end (18) toward the first end (15).

6. The oil seal disassembly device according to claim 5, characterized in that: The pawl (2) includes a third end (19), an intermediate connecting part (20) and a fourth end (21) arranged in sequence. The third end (19) is hinged to the first end (15). The abutting part (6) is provided at the fourth end (21). One end of the connecting rod (3) that is hinged to the pawl (2) is hinged to the intermediate connecting part (20).

7. The oil seal disassembly device according to claim 6, characterized in that: The fourth end (21) is bent along the axial direction of the base (1) and toward the second end (18) to form a bent portion, and the abutment portion (6) is disposed on the bent portion.

8. The oil seal disassembly device according to claim 6, characterized in that: The sliding member (4) includes a sliding body (22) and a first hinge portion (23). The sliding body (22) is sleeved on the sliding portion (16) so that the sliding body (22) is slidably disposed on the sliding portion (16) along the axial direction of the base (1). One end of the connecting rod (3) that is hinged to the sliding member (4) is hinged to the first hinge portion (23).

9. The oil seal disassembly device according to claim 8, characterized in that: A pawl (2), a second hinge (52), a connecting rod (3), and a first hinge (23) form an adjustment and disassembly assembly. Several adjustment and disassembly assemblies are provided, and the several adjustment and disassembly assemblies are arranged circumferentially around the axis of the base (1).

10. The oil seal disassembly device according to any one of claims 1-9, characterized in that: The base (1) is provided with scale lines and data labels, and the positioning component (5) is provided with a reference surface. The scale lines, the data labels and the reference surface cooperate to mark the diameter of the contact area.

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