Simple rear oil seal press-in device

Abstract

The utility model relates to the technical field of engine production, in particular to a simple rear oil seal press-in device. Comprising a pressing sleeve, a guide core is arranged in the pressing sleeve, two connecting bolts are arranged on the guide core, an engine oil seal is arranged at the position between the edge of the pressing sleeve and an engine crankshaft, an inward contraction groove is formed in the side, away from the pressing sleeve, of the guide core, a channel is formed in the axis position of the pressing sleeve, and a compression bolt is arranged in the channel. According to the press-in device for the engine crankshaft, the positioning pin sleeve is arranged at the position, located in the inner containing groove, of the compression bolt, the compression bolt is prevented from moving out of the inner containing groove through the positioning pin sleeve, and after a worker disassembles the press-in device from the engine crankshaft, the compression bolt is prevented from being completely separated from the guide core; and the step of inserting a compression bolt into an inner collecting groove is omitted when a worker presses the engine oil seal subsequently, so that the efficiency of press-fitting the engine oil seal is improved.

Description

Technical Field

[0001] This utility model relates to the field of engine manufacturing technology, and more specifically, to a simple rear oil seal pressing device. Background Technology

[0002] The rear oil seal is a major component of the engine, and the quality of its press-fitting has a significant impact on the engine. The press-fitting of the engine's rear oil seal, especially during the trial production of new products, often involves the use of a recommended oil seal press-fitting device.

[0003] Previously, oil seals were manually pressed in by hammering. However, this method could not guarantee that the rear oil seal was evenly stressed, and the rear oil seal was prone to being pressed off-center, which could not guarantee the assembly accuracy requirements of the rear oil seal. Later, a method of pressing in by rotating bolts and nuts was developed, which can press the rear oil seal onto the engine crankshaft evenly.

[0004] Existing rotary press-fit devices work by aligning a guide core with the crankshaft, achieving perfect concentricity between the guide core and crankshaft via a bayonet, and then placing a pressure sleeve on the guide core. The pressure sleeve is then pushed by tightening the clamping bolt with a pneumatic wrench, pressing the engine oil seal 3 onto the engine crankshaft. However, when repositioning the pressure sleeve from the guide core, the clamping bolt and pressure sleeve easily separate from the guide core. Subsequent press-fitting of the engine oil seal 3 by workers using this device requires repositioning the pressure sleeve onto the guide core, making the operation cumbersome and reducing the efficiency of press-fitting engine oil seals. If the extension of the thread length of the clamping bolt is used to prevent the pressure sleeve from separating from the guide core, it will be difficult for the worker to determine the number of turns of the clamping bolt when resetting the pressure sleeve from the guide core. The worker may turn the clamping bolt too few or too many times. If the number of turns of the clamping bolt is too few, the worker will need to readjust the position of the pressure sleeve on the guide core when pressing the engine oil seal 3. If the number of turns of the clamping bolt is too many, the worker will need to turn the clamping bolt more times when pressing the engine oil seal 3, which also reduces the efficiency of pressing the engine oil seal 3. Utility Model Content

[0005] The purpose of this invention is to provide a simple rear oil seal pressing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, one of the objectives of this utility model is to provide a simple rear oil seal pressing device, including a pressure sleeve. A guide core is provided inside the pressure sleeve, and two connecting bolts are provided on the guide core. The engine oil seal is positioned between the edge of the pressure sleeve and the engine crankshaft. An inward groove is formed on the side of the guide core away from the pressure sleeve. A channel is formed on the axial position of the pressure sleeve, and a clamping bolt is provided inside the channel. One end of the clamping bolt passes through one side of the guide core and extends into the inward groove, and the clamping bolt is threadedly connected to the guide core. An expansion ring is fixedly connected to the clamping bolt, and the expansion ring contacts the side of the pressure sleeve away from the guide core. A first movable groove is formed on the clamping bolt, and two symmetrically sliding positioning pins are arranged inside the first movable groove. A displacement mechanism is provided between the two positioning pins. When one end of the clamping bolt is inserted into the inward groove, the displacement mechanism drives the two positioning pins to extend from the first movable groove into the inward groove. When one end of the clamping bolt is pulled out of the inward groove, the displacement mechanism drives the two positioning pins into the interior of the first movable groove.

[0007] As a further improvement to this technical solution, the displacement mechanism includes a partition plate fixedly disposed in the middle position inside the first movable groove. The partition plate is disposed between two positioning pin sleeves, and springs are fixedly connected to both sides of the partition plate. The ends of the two springs that are far apart from each other are respectively fixedly disposed in the two positioning pin sleeves.

[0008] As a further improvement to this technical solution, the displacement mechanism further includes a second movable groove opened inside the clamping bolt. The second movable groove is connected to the first movable groove. A push plate is slidably arranged inside the second movable groove. A wedge is fixedly connected to one side of the positioning pin sleeve. The sides of the two wedges that are close to each other are set as inclined surfaces. The wedges are arranged in the second movable groove. The two ends of the push plate are in sliding contact with the inclined surfaces of the two wedges respectively.

[0009] As a further improvement to this technical solution, the displacement mechanism also includes an extension bolt rotatably disposed on the side of the push plate away from the positioning pin sleeve. The other end of the extension bolt extends to the outside of the second movable groove. A nut is threaded onto the extension bolt, and the nut is fixedly disposed in the second movable groove.

[0010] As a further improvement to this technical solution, when the push plate approaches the partition, the push plate pushes the two wedges away from each other, and the wedges drive the positioning pin sleeve away from the partition, so that the end of the positioning pin sleeve away from the partition moves to the outside of the first movable groove. When the push plate moves away from the partition, the rebounding spring drives the positioning pin sleeve to approach the partition, so that the end of the positioning pin sleeve away from the partition enters the first movable groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This simple rear oil seal pressing device has a locating pin sleeve at the position where the pressing bolt is located inside the inner groove. The locating pin sleeve prevents the pressing bolt from moving out of the inner groove. After the worker removes the pressing device from the engine crankshaft, it prevents the pressing bolt from completely separating from the guide core. The worker can then skip the step of inserting the pressing bolt into the inner groove when pressing the engine oil seal, thus improving the efficiency of pressing the engine oil seal.

[0013] 2. This simple rear oil seal pressing device allows workers to easily replace damaged pressure sleeves and guide cores when needed. By turning the extension bolt to move the push plate away from the partition, the spring-loaded mechanism moves the positioning pin sleeve closer to the partition, completely retracting it into the first movable groove. This prevents the positioning pin sleeve from obstructing the clamping bolt from being removed from the inner groove, facilitating the separation of the guide core and pressure sleeve. When the guide core or pressure sleeve is damaged, workers can replace the damaged one individually, improving the flexibility of the device and ensuring its adaptability to different situations. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the guide core and engine oil seal of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the pressure sleeve and the clamping bolt of this utility model.

[0018] Figure 5 For the present utility model Figure 4 A sectional view;

[0019] Figure 6 This is a schematic diagram of the clamping bolt of this utility model;

[0020] Figure 7 This is a cross-sectional view of the clamping bolt of this utility model;

[0021] Figure 8 This is a schematic diagram of the structure of the wedge block and push plate combined according to this utility model;

[0022] Figure 9 This is a cross-sectional view of the clamping bolt of this utility model;

[0023] Figure 10 This is a cross-sectional view of the pressure sleeve of this utility model.

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Pressure sleeve; 11. Channel;

[0026] 2. Guide core; 21. Connecting bolt; 22. Inner groove;

[0027] 3. Engine oil seal;

[0028] 4. Tightening bolt; 41. Expansion ring; 42. First movable groove; 43. Second movable groove;

[0029] 5. Locating pin sleeve; 51. Wedge block;

[0030] 6. Partition; 7. Spring;

[0031] 8. Push plate; 81. Extension bolt;

[0032] 9. Nuts. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1

[0035] Please see Figures 1-10 As shown, one of the objectives of this embodiment is to provide a simple rear oil seal pressing device, including a pressure sleeve 1. The pressure sleeve 1 has a guide core 2 inside, and two connecting bolts 21 are provided on the guide core 2. The connecting bolts 21 are used to coaxially fix the guide core 2 to the engine crankshaft. Two threaded grooves are opened on the engine crankshaft at positions corresponding to the two connecting bolts 21. By screwing the two connecting bolts 21 into the corresponding threaded grooves, the guide core 2 can be coaxially fixed to the engine crankshaft. At this time, the guide core 2 plays a guiding role for the pressure sleeve 1 sleeved on its outer side, so that the pressure sleeve 1 can only move along the axial direction of the engine crankshaft.

[0036] An inner groove 22 is provided on the side of the guide core 2 away from the pressure sleeve 1. A channel 11 is provided on the axis of the pressure sleeve 1. A clamping bolt 4 is provided inside the channel 11. The clamping bolt 4 and the channel 11 are slidably connected. At the same time, one end of the clamping bolt 4 passes through one side of the guide core 2 and extends into the inner groove 22. The clamping bolt 4 is threadedly connected to the guide core 2. An expansion ring 41 is fixedly connected to the clamping bolt 4. The expansion ring 41 contacts the side of the pressure sleeve 1 away from the guide core 2. When the worker presses the engine oil seal 3 on the engine crankshaft, he first places the engine oil seal 3 on one side of the predetermined pressing position on the engine crankshaft, then inserts the guide core 2 into the inside of the engine oil seal 3, and then fixes the guide core 2 on the engine crankshaft. The pressure sleeve 1 is then placed on the guide core 2 so that the edge of the guide core 2 contacts the engine oil seal 3. The engine oil seal 3 is placed on the pressure sleeve 1. The sleeve 1 is positioned between the edge and the engine crankshaft, and one end of the clamping bolt 4 is inserted into the inner groove 22. The clamping bolt 4 and the guide core 2 are in the starting position of the threaded connection. The worker then uses a pneumatic wrench to tighten the clamping bolt 4. Through the threaded connection between the clamping bolt 4 and the guide core 2, the clamping bolt 4 and the expansion ring 41 are brought closer to the engine crankshaft. The moving expansion ring 41 pushes the sleeve 1 closer to the engine crankshaft. The moving sleeve 1 presses the engine oil seal 3 towards the engine crankshaft. When the side of the sleeve 1 close to the engine crankshaft contacts the guide core 2, the expansion ring 41 stops pushing the sleeve 1 closer to the engine crankshaft, and the sleeve 1 stops pressing the engine oil seal 3. At this time, the engine oil seal 3 has been pressed into the predetermined position on the engine crankshaft, avoiding damage to the engine oil seal 3 and the engine crankshaft due to excessive pressing depth.

[0037] After the worker presses the engine oil seal 3 onto the engine crankshaft, the pressing device in this solution needs to be removed from the current engine crankshaft in preparation for pressing the next engine oil seal 3. The steps for removing the pressing device are as follows: First, turn the clamping bolt 4 in the reverse direction to move the clamping bolt 4 away from the engine crankshaft until the clamping bolt 4 and the guide core 2 are disengaged from the threaded connection. At this time, pull the pressing sleeve 1 away from the engine crankshaft so that the pressing sleeve 1 contacts the expansion ring 41 again, leaving space on the side wall of the guide core 2 for the engine oil seal 3 to be fitted. Then, unscrew the connecting bolt 21 from the threaded groove on the engine crankshaft and remove the guide core 2 from the engine crankshaft. This completes the disassembly of the pressing device in this solution.

[0038] During the disassembly of the clamping bolt 4, after the clamping bolt 4 is disconnected from the guide core 2, it is easy for the clamping bolt 4 to fall off the guide core 2. When the worker subsequently presses in the engine oil seal 3, the clamping bolt 4 needs to be reinserted into the inner groove 22, which is inconvenient and reduces the efficiency of the worker pressing in the engine oil seal 3. To solve this problem, a first movable groove 42 is provided on the clamping bolt 4. Two locating pin sleeves 5 are symmetrically slidably arranged inside the first movable groove 42. A displacement mechanism is provided between the two locating pin sleeves 5. The displacement mechanism is used to drive the two locating pin sleeves 5 to move relative to each other. When one end of the clamping bolt 4 is inserted into the inner groove 22, the displacement mechanism drives the two locating pin sleeves 5 out of the first movable groove 42. The positioning pin sleeve 5 extends into the inner groove 22. After the positioning pin sleeve 5 extends out of the first movable groove 42 and into the inner groove 22, the length of the two positioning pin sleeves 5 at the ends that are far apart from each other is greater than the size of the clamping bolt 4 when it is inserted into the guide core 2. When the clamping bolt 4 and the guide core 2 are disengaged from the threaded connection, if the clamping bolt 4 continues to move away from the guide core 2, the clamping bolt 4 will drive the positioning pin sleeve 5 to move to the position where it collides with the inner wall of the inner groove 22. At this time, the positioning pin sleeve 5 prevents the clamping bolt 4 from moving out of the inner groove 22, thereby preventing the clamping bolt 4 from completely separating from the guide core 2. The worker can press the engine oil seal 3 without the step of inserting the clamping bolt 4 into the inner groove 22, which improves the efficiency of pressing the engine oil seal 3.

[0039] When one end of the clamping bolt 4 is pulled out from the inner groove 22, the displacement mechanism drives the two positioning pin sleeves 5 into the interior of the first movable groove 42. At this time, the distance between the ends of the two positioning pin sleeves 5 that are far apart from each other is less than the size of the clamping bolt 4 when it is inserted into the guide core 2. At this time, the clamping bolt 4 can leave the guide core 2 through the position of the clamping bolt 4.

[0040] The following details the structure of the displacement mechanism, referring to... Figure 7 and Figure 8The displacement mechanism includes a partition 6 fixedly disposed in the middle of the first movable groove 42. Springs 7 are fixedly connected to both sides of the partition 6. The ends of the two springs 7 that are far apart from each other are respectively fixedly disposed in two positioning pin sleeves 5. The displacement mechanism also includes a second movable groove 43 formed inside the clamping bolt 4. The second movable groove 43 is connected to the first movable groove 42. A push plate 8 is slidably disposed inside the second movable groove 43. A wedge block 51 is fixedly connected to one side of the positioning pin sleeve 5. The sides of the two wedge blocks 51 that are close to each other are set as inclined surfaces, and the wedge blocks 51 are disposed in the second movable groove 43. The two ends of the push plate 8 are in sliding contact with the inclined surfaces of the two wedge blocks 51. The displacement mechanism also includes an extension bolt 81 rotatably disposed on the side of the push plate 8 away from the positioning pin sleeve 5. The other end of the extension bolt 81 extends to the outside of the second movable groove 43. A nut 9 is threaded onto the extension bolt 81. The nut 9 is fixedly disposed in the second movable groove 43. In the second movable groove 43, the nut 9 restricts the position of the extension bolt 81 and the push plate 8. When the pressing device is in normal use, the distance between the contact position of the push plate 8 and the inclined surface of the wedge 51 and the partition 6 is small. At this time, the two positioning pin sleeves 5 are inside the first movable groove 42. When the push plate 8 pushes the two wedges 51 away from each other, the push plate 8 will expand the distance between the two wedges 51. At this time, the wedges 51 will drive the positioning pin sleeves 5 away from the partition 6. During the process of the positioning pin sleeves 5 moving away from the partition 6, the spring 7 is in an elastic tension state, so that the end of the positioning pin sleeves 5 away from the partition 6 moves to the outside of the first movable groove 42. When the clamping bolt 4 moves away from the guide core 2, the positioning pin sleeve 5 will contact the inner wall of the inner groove 22. By means of the contact friction between the positioning pin sleeve 5 and the inner groove 22, the stability of the clamping bolt 4 inside the inner groove 22 is further increased, ensuring that the clamping bolt 4 will not fall out of the guide core 2 when the device is transferred.

[0041] A locating pin sleeve 5 is installed at the position where the clamping bolt 4 is located inside the inner groove 22. The locating pin sleeve 5 prevents the clamping bolt 4 from moving out of the inner groove 22. After the worker removes the pressing device from the engine crankshaft, it prevents the clamping bolt 4 from completely separating from the guide core 2. The worker can then skip the step of inserting the clamping bolt 4 into the inner groove 22 when pressing the engine oil seal 3, thus improving the efficiency of pressing the engine oil seal 3.

[0042] During the use of the pressing device, the pressure sleeve 1 and guide core 2 may be damaged. In this case, the pressure sleeve 1 and guide core 2 need to be disassembled for individual replacement. The worker then tightens the extension bolt 81, connecting it to the nut 9, to move the extension bolt 81 and push plate 8 away from the partition 6. The spring 7 then rebounds, causing the positioning pin sleeve 5 to move closer to the partition 6. The moving positioning pin sleeve 5 then moves the corresponding wedge block 51 closer to the push plate 8, causing the inclined surfaces of the push plate 8 and the wedge block 51 to slide relative to each other. When the push plate 8... When plate 8 is away from partition 6, after the threaded connection of extension bolt 81 and nut 9 reaches the end position, the end of positioning pin sleeve 5 away from partition 6 enters the first movable groove 42. Positioning pin sleeve 5 will no longer block the clamping bolt 4 from being pulled out of inner groove 22. The worker pulls the clamping bolt 4 to separate the clamping bolt 4 from the guide core 2 and the pressure sleeve 1 in turn. The guide core 2 and the pressure sleeve 1 can be separated. When the guide core 2 or the pressure sleeve 1 is damaged, the damaged guide core 2 or the pressure sleeve 1 can be replaced separately, which improves the flexibility of the device and ensures that the device can adapt to different situations.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A simple rear oil seal pressing device, comprising a pressure sleeve (1), characterized in that: The pressure sleeve (1) has a guide core (2) inside, and two connecting bolts (21) are provided on the guide core (2). The engine oil seal (3) is located at the edge of the pressure sleeve (1) and between the engine crankshaft. An inner groove (22) is opened on the side of the guide core (2) away from the pressure sleeve (1). A channel (11) is opened on the axis of the pressure sleeve (1). A clamping bolt (4) is provided inside the channel (11). One end of the clamping bolt (4) passes through one side of the guide core (2) and extends into the inner groove (22). The clamping bolt (4) is threadedly connected to the guide core (2). An expansion ring (4) is fixedly connected to the clamping bolt (4). 1) The expansion ring (41) contacts the side of the pressure sleeve (1) away from the guide core (2). The clamping bolt (4) is provided with a first movable groove (42). Two positioning pin sleeves (5) are symmetrically slidably arranged inside the first movable groove (42). A displacement mechanism is provided between the two positioning pin sleeves (5). When one end of the clamping bolt (4) is inserted into the inner groove (22), the displacement mechanism drives the two positioning pin sleeves (5) to extend from the first movable groove (42) into the inner groove (22). When one end of the clamping bolt (4) is pulled out from the inner groove (22), the displacement mechanism drives the two positioning pin sleeves (5) into the interior of the first movable groove (42).

2. The simplified rear oil seal pressing device according to claim 1, characterized in that: The displacement mechanism includes a partition (6) fixedly installed in the middle of the first movable groove (42). The partition (6) is located between two positioning pin sleeves (5). Springs (7) are fixedly connected to both sides of the partition (6). The ends of the two springs (7) that are far apart from each other are respectively fixedly installed in the two positioning pin sleeves (5).

3. The simplified rear oil seal pressing device according to claim 2, characterized in that: The displacement mechanism further includes a second movable groove (43) opened inside the clamping bolt (4). The second movable groove (43) is connected to the first movable groove (42). A push plate (8) is slidably arranged inside the second movable groove (43). A wedge (51) is fixedly connected to one side of the positioning pin sleeve (5). The sides of the two wedges (51) that are close to each other are set as inclined surfaces. The wedges (51) are arranged in the second movable groove (43). The two ends of the push plate (8) are in sliding contact with the inclined surfaces of the two wedges (51).

4. The simplified rear oil seal pressing device according to claim 3, characterized in that: The displacement mechanism also includes an extension bolt (81) rotatably disposed on the side of the push plate (8) away from the positioning pin sleeve (5). The other end of the extension bolt (81) extends to the outside of the second movable groove (43). A nut (9) is threaded onto the extension bolt (81), and the nut (9) is fixedly disposed in the second movable groove (43).

5. The simplified rear oil seal pressing device according to claim 4, characterized in that: When the push plate (8) approaches the partition plate (6), the push plate (8) pushes the two wedges (51) away from each other. The wedges (51) drive the positioning pin sleeve (5) away from the partition plate (6), so that the end of the positioning pin sleeve (5) away from the partition plate (6) moves to the outside of the first movable groove (42). When the push plate (8) moves away from the partition plate (6), the spring (7) returns and drives the positioning pin sleeve (5) to approach the partition plate (6), so that the end of the positioning pin sleeve (5) away from the partition plate (6) enters the first movable groove (42).

Images