A self-lubricating tapered pin and its processing equipment

Abstract

This invention relates to the field of tapered pin technology and discloses a self-lubricating tapered pin and its processing equipment, comprising: a shaft body with two fixing plates mounted on the top end and a pin connected to the bottom end; a lubrication assembly provided on the shaft body, the lubrication assembly including a sleeve, a piston, and an internally threaded cylinder; the lubrication assembly further including a self-lubricating part, which can automatically squeeze out grease from the piston when there is insufficient lubrication between the sleeve and the structural hinge; the lubrication assembly also includes a display part. Through the lubrication assembly, the piston can squeeze out grease and replenish it to the contact area between the sleeve and the structural hinge through oil passages, annular grooves, and overflow grooves, achieving continuous lubrication; through the self-lubricating part, when there is insufficient lubrication between the sleeve and the structural hinge, the piston can automatically squeeze out grease, achieving automatic response to lubrication needs.

Description

Technical Field

[0001] This invention relates to the field of tapered pin technology, and more specifically to a self-lubricating tapered pin and its processing equipment. Background Technology

[0002] As a key component in structural hinges, tapered pins play an important role in various machines and structures, enabling rotation and connection. Their main body is cylindrical with one end shaped like a frustum, and the other end has a slightly smaller diameter. Their surface is precision-machined to ensure accurate fit. In structural hinges, tapered pins are the core component connecting fixed and rotating parts. Fixed parts are typically connected to the foundation structure or a fixed frame, providing stable support, while rotating parts are connected to the movable components and can rotate around the connection point. The connection between the two is achieved through tapered pins. Both fixed and rotating parts have pin holes. After the tapered pin is inserted into the two pin holes, the tight fit between the pin body and the pin hole transmits force and movement, ensuring that the rotating part can rotate flexibly around the tapered pin while maintaining the stability of the connection and the overall structural integrity.

[0003] However, the existing technology has the following problems:

[0004] During long-term use, lubrication failure is prone to occur in the contact area between the tapered pin and the structural hinge. This is because the grease in this area gradually decreases or even runs out due to continuous friction, external environmental corrosion, or decreased sealing performance, leading to poor lubrication. In this situation, the metal surfaces of the tapered pin and the hinge will directly rub against each other, which not only accelerates the wear of the components and produces a harsh noise, but also causes the clearance between them to widen continuously, ultimately adversely affecting the stability and reliability of the connection between the structural hinge and the tapered pin. Summary of the Invention

[0005] The purpose of this invention is to provide a self-lubricating tapered pin and its processing equipment to solve the above-mentioned problems. It aims to overcome the defects of existing tapered pins, which are prone to poor lubrication due to grease loss between the pin and the structural hinge after long-term use, resulting in wear, abnormal noise and unstable connection. Details are described below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a self-lubricating tapered pin, comprising: a shaft body with two fixing plates mounted at its top end and a pin connected to its bottom end; a lubrication assembly on the shaft body, the lubrication assembly including a sleeve, a piston, and an internally threaded cylinder, the sleeve being rotatably connected to the outer wall of the shaft body, the internally threaded cylinder being rotatably connected to the inner wall of the sleeve, the shaft body being capable of being filled with grease, the shaft body having two oil passages, the sleeve having an annular groove, and multiple overflow grooves being provided between the annular groove and the outer wall of the sleeve; the piston being used to squeeze out grease; the lubrication assembly further includes a self-lubricating part, which can automatically squeeze out grease by driving the piston when there is insufficient lubrication between the sleeve and the structural hinge; the lubrication assembly further includes a display part for displaying the remaining grease in the shaft body.

[0008] Preferably, the lubrication assembly further includes a rotating shaft, which is rotatably mounted on a shaft body. A key shaft is connected to the rotating shaft, and the piston is slidably connected to the key shaft. The piston is provided with threaded residual teeth, and the threaded residual teeth of the piston are threadedly connected to an internal threaded cylinder.

[0009] Preferably, both oil passages are connected to the annular groove, an oil inlet is provided inside the pin, and a one-way valve is provided in the oil inlet of the pin and in each of the two oil passages.

[0010] Preferably, the self-lubricating part includes two outer fixing blocks and two inner fixing blocks. The two outer fixing blocks are fixedly installed on the sleeve, and the two inner fixing blocks are fixedly installed on the shaft. Arc-shaped springs are connected between the two outer fixing blocks and the two inner fixing blocks respectively. An elastic telescopic rod is installed inside the outer fixing block, and a ratchet block is connected to the elastic telescopic rod. A ratchet ring is connected to the outer wall of the internal threaded cylinder, and the two ratchet blocks engage with the ratchet ring in one direction.

[0011] Preferably, the self-lubricating part further includes a locking head, which is threaded onto the shaft and abuts against the rotating shaft.

[0012] Preferably, the display unit includes a worm gear rotatably mounted in a shaft body, a gear connected to the worm gear, a gear ring connected to the outer wall of the internal threaded cylinder, the gear ring meshing with the gear, a lead screw rotatably mounted in the shaft body, a worm wheel mounted on the lead screw, the worm wheel meshing with the worm gear, a slider slidably connected in the shaft body, a slide rod slidably connected to the inner wall of the slider, a pointer block connected to the top of the slide rod, a sliding tongue provided at the bottom of the slide rod, a compression spring provided between the pointer block and the slider, a threaded groove provided in the lead screw, and the sliding tongue of the slide rod slidably connected to the threaded groove of the lead screw.

[0013] Preferably, a scale plate is mounted on the shaft, and the slide rod is slidably connected to the scale plate.

[0014] Preferably, the pointer block is provided with a pull ring at the top, and the scale plate is provided with scale lines.

[0015] Preferably, the device also includes a shoulder, on which a fixing pin is slidably connected. The pin has a through hole, allowing it to be inserted into the shoulder and the fixing pin to be inserted into the through hole.

[0016] A self-lubricating tapered pin machining device includes an operating table with a mounting base. The mounting base is equipped with a spindle assembly, a tool feed assembly, and a hole machining assembly. The spindle assembly is used to clamp and drive the shaft to rotate. The tool feed assembly is used to drive the tool to feed towards the shaft to complete the cutting process. The hole machining assembly completes the drilling and internal threading.

[0017] The beneficial effects are:

[0018] 1. This self-lubricating tapered pin, through the setting of the lubrication component, enables the piston to squeeze out grease and replenish it to the contact part between the sleeve and the structural hinge through the oil passage, annular groove and overflow groove, achieving the technical effect of continuous lubrication and avoiding problems such as increased wear, abnormal noise and increased fit clearance caused by insufficient lubrication.

[0019] 2. This self-lubricating tapered pin, through the self-lubricating part, allows the piston to automatically squeeze out grease when the sleeve and structural hinge are insufficiently lubricated, achieving the technical effect of automatically responding to lubrication needs. This avoids the trouble of frequent manual maintenance and malfunctions caused by untimely lubrication. The locking head allows the piston to be manually squeezed out or reset to replenish grease after the locking head is removed. After installation, it can lock the rotating shaft and key shaft into a self-lubricating state, achieving the technical effect of flexibly switching between manual operation and automatic lubrication mode. This avoids the inconvenience of emergency operation that may occur if only automatic lubrication is relied upon.

[0020] 3. The self-lubricating tapered pin, through the setting of the display section, allows the remaining grease in the shaft to be displayed intuitively through the pointer block and scale plate, achieving the technical effect of making it easy to judge the remaining grease and avoiding the situation of grease being exhausted due to not knowing the remaining amount. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the self-lubricating tapered pin structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the shaft structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the lubrication assembly structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the oil passage structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the self-lubricating part structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the ratchet ring structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the rotating shaft structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the locking head structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the scale plate structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the display section structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the lead screw structure of the present invention;

[0033] Figure 12 This is a schematic diagram of the slide bar structure of the present invention;

[0034] Figure 13 This is a schematic diagram of the self-lubricating tapered pin processing equipment of the present invention.

[0035] The annotations in the attached figures are explained as follows:

[0036] 1. Shaft body; 2. Fixing plate; 3. Pin; 4. Shoulder; 5. Fixing pin;

[0037] 6. Lubrication components; 61. Sleeve; 62. Shaft; 63. Key shaft; 64. Piston; 65. Internally threaded cylinder; 66. Oil passage; 67. Annular groove;

[0038] 7. Self-lubricating part; 71. External fixing block; 72. Internal fixing block; 73. Arc spring; 74. Elastic telescopic rod; 75. Ratchet block; 76. Ratchet ring; 77. Locking head;

[0039] 8. Display unit; 81. Worm gear; 82. Gear; 83. Gear ring; 84. Lead screw; 85. Worm wheel; 86. Slider; 87. Slide bar; 88. Pointer block; 89. Scale plate;

[0040] 11. Control panel; 12. Mounting base; 13. Spindle assembly; 14. Tool feed assembly; 15. Hole machining assembly. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention. Example 1

[0042] As the service time increases, the grease at the contact point between the tapered pin and the structural hinge is easily lost due to friction, environmental corrosion, or seal failure, resulting in insufficient lubrication. This causes direct friction between the metal contact surfaces of the tapered pin and the hinge, leading to increased wear and abnormal noise. It also increases the clearance and affects the stability and reliability of the connection between the structural hinge and the locating pin. This embodiment is invented to solve the above problems.

[0043] Please see Figure 1 - Figure 2 A self-lubricating tapered pin includes: a shaft body 1, with two fixing plates 2 mounted on the top end of the shaft body 1 and a pin shaft 3 connected to the bottom end of the shaft body 1; each of the two fixing plates 2 is equipped with a screw; the structural hinge is divided into a fixed component and a rotating component; the two fixing plates 2 are connected to the fixed component of the structural hinge through the screws to achieve the effect of fixing the shaft body 1.

[0044] In this embodiment, please refer to Figure 2 - Figure 4 A lubrication assembly 6 is provided on the shaft 1. The lubrication assembly 6 includes a sleeve 61, a piston 64, and an internally threaded cylinder 65. The sleeve 61 is rotatably connected to the outer wall of the shaft 1, and the internally threaded cylinder 65 is rotatably connected to the inner wall of the sleeve 61. The shaft 1 can be filled with grease. The shaft 1 is provided with two oil passages 66. The sleeve 61 is provided with an annular groove 67. Both oil passages 66 are connected to the annular groove 67. Multiple overflow grooves are provided between the annular groove 67 and the outer wall of the sleeve 61. The piston 64 is used to squeeze out the grease. When the piston 64 moves towards the oil passage 66, it pushes the grease. The grease flows into the annular groove 67 through the two oil passages 66, and then overflows to the contact part between the sleeve 61 and the hinge through the multiple overflow grooves between the annular groove 67 and the outer wall of the sleeve 61, thereby replenishing the grease.

[0045] Furthermore, please refer to Figure 2 - Figure 3The lubrication assembly 6 also includes a rotating shaft 62, which is rotatably mounted on the shaft body 1. A key shaft 63 is connected to the rotating shaft 62. A piston 64 is slidably connected to the key shaft 63. The piston 64 has residual threads, which are threadedly connected to the internal threaded cylinder 65. After the shaft body 1 and the sleeve 61 are connected to the structural hinge, the sleeve 61 contacts the rotating component of the structural hinge. The rotating shaft 62 has a cross groove. By rotating the cross groove clockwise with a screwdriver, the rotating shaft 62 drives the key shaft 63. When rotated clockwise, the key shaft 63 rotates, driving the piston 64 to rotate. Since the internal threaded cylinder 65 does not rotate at this time, and the key shaft 63 provides a guide for the piston 64, allowing the piston 64 to slide axially along the key shaft 63, the piston 64 moves towards the oil passage 66 by utilizing the engagement of the thread residue with the internal threaded cylinder 65. This causes grease to overflow from the multiple overflow grooves of the sleeve 61, replenishing the contact area between the sleeve 61 and the rotating component of the structural hinge, thereby achieving a lubrication effect.

[0046] In addition, please see Figure 2 - Figure 6The lubrication assembly 6 also includes a self-lubricating part 7, which can automatically squeeze out grease from the piston 64 when there is insufficient lubrication between the sleeve 61 and the structural hinge. The self-lubricating part 7 includes two outer fixing blocks 71 and two inner fixing blocks 72. The two outer fixing blocks 71 are fixedly installed on the sleeve 61, and the two inner fixing blocks 72 are fixedly installed on the shaft 1. Arc springs 73 are connected between the two outer fixing blocks 71 and the two inner fixing blocks 72 respectively. An elastic telescopic rod 74 is installed inside the outer fixing block 71, and a ratchet block 75 is connected to the elastic telescopic rod 74. The outer wall of the internal threaded cylinder 65 is connected to... A ratchet ring 76 is attached, and two ratchet blocks 75 engage with the ratchet ring 76 in one direction. During use, the rotating component rotates on the sleeve 61. Since the shaft 1 is fixed, the sleeve 61 not rotating with the rotating component indicates good lubrication. However, when the lubrication at the contact point between the sleeve 61 and the rotating component is insufficient, the friction between the rotating component and the sleeve 61 increases, causing the rotating component to drive the sleeve 61 to rotate. Since the rotating component reciprocates, the sleeve 61 also reciprocates. When the sleeve 61 rotates, it drives the two outer fixed blocks 71 to move synchronously, with one of them... Taking the external fixing block 71 as an example, the elastic telescopic rod 74 inside the external fixing block 71 is equipped with a spring, which has the ability to elastically extend and retract. This allows the ratchet blocks 75 on the elastic telescopic rod 74 to always press against the ratchet ring 76. Utilizing the one-way meshing characteristic of the ratchet blocks 75 and the ratchet ring 76, when the two ratchet blocks 75 rotate counterclockwise, they can drive the ratchet ring 76 and the internal threaded cylinder 65 to rotate counterclockwise. When the two ratchet blocks 75 rotate clockwise, the elastic telescopic rod 74 connected to the two ratchet blocks 75 retracts, and the two ratchet blocks 75 slide along the surface of the ratchet ring 76, causing the two ratchet blocks 75 to rotate clockwise. When rotating, the ratchet ring 76 does not rotate. Therefore, when there is insufficient lubrication at the contact point between the sleeve 61 and the rotating component, the internal threaded cylinder 65 can rotate counterclockwise intermittently during the movement of the rotating component. When the internal threaded cylinder 65 rotates, the piston 64 and the key shaft 63 do not rotate, so that the counterclockwise rotation of the internal threaded cylinder 65 can be converted into the linear motion of the piston 64 along the key shaft 63, thereby causing the piston 64 to move towards the oil passage 66, thus achieving the technical effect of squeezing out grease from the overflow groove of the sleeve 61, so as to ensure the lubrication effect between the sleeve 61 and the structural hinge.

[0047] In addition, please see Figure 3 , Figure 4The pin 3 is equipped with an oil inlet. The oil inlet of the pin 3 and the two oil passages 66 are equipped with one-way valves. When grease needs to be added, the cross groove is first turned counterclockwise with a screwdriver. On the same principle as above, when the key shaft 63 drives the piston 64 to rotate counterclockwise, the piston 64 can move away from the oil passage 66 during the counterclockwise rotation, thereby achieving the reset effect. After the piston 64 is reset, the operator fills the shaft body 1 with grease through the oil inlet of the pin 3. The one-way valves in the oil inlet and the two oil passages 66 play the role of one-way flow and reverse cut-off, so that the grease can only flow in one direction.

[0048] It is worth noting that, please refer to Figure 7 , Figure 8 The self-lubricating part 7 also includes a locking head 77, which is threaded onto the shaft body 1 and abuts against the rotating shaft 62. After installation, the locking head 77 can tightly abut against the rotating shaft 62, thereby locking the rotating shaft 62 and preventing the rotating shaft 62 and key shaft 63 from rotating in the shaft body 1. This prevents the piston 64 from rotating when the internal threaded cylinder 65 rotates, thus preventing the piston 64 from effectively squeezing out the grease. When it is necessary to reset the piston 64 or manually squeeze out the grease from the piston 64, the locking head 77 can be removed, which will expose the cross groove of the rotating shaft 62, allowing the rotating shaft 62 to be rotated with a screwdriver. A direction indicator can be set on the shaft body 1 to prevent the operator from turning in the wrong direction.

[0049] It is worth noting that, please refer to Figure 1 - Figure 2 It also includes a shoulder 4, on which a fixing pin 5 is slidably connected. The pin 3 has a through hole, allowing the pin 3 to be inserted into the shoulder 4 and the fixing pin 5 to be inserted into the through hole of the pin 3. In the assembly process, the shaft 1 and sleeve 61 are first installed on the structural hinge, the shoulder 4 is placed on the pin 3, and the fixing pin 5 is pushed into the through hole of the pin 3, thereby achieving the effect of fixing the shoulder 4 on the pin 3. The shoulder 4 can prevent the shaft 1 from falling off the hinge during use, enhancing the connection stability of the overall structure. At the same time, the simple insertion and removal operation also facilitates later maintenance and adjustment. Example 2

[0050] Based on Example 1, since the grease in the shaft 1 needs to be replenished regularly, and it is inconvenient for workers to judge the remaining amount of grease in the shaft 1, this example was invented to solve the above problem.

[0051] Please see Figure 2 , Figure 9 - Figure 12The lubrication assembly 6 also includes a display unit 8 for displaying the remaining grease in the shaft 1. The display unit 8 includes a worm 81, which is rotatably mounted inside the shaft 1. A gear 82 is connected to the worm 81. A gear ring 83 is connected to the outer wall of the internal threaded cylinder 65, and the gear ring 83 meshes with the gear 82. A lead screw 84 is rotatably mounted inside the shaft 1, and a worm wheel 85 is mounted on the lead screw 84, meshing with the worm 81. A slider 86 is slidably connected inside the shaft 1, and a slide rod 87 is slidably connected to the inner wall of the slider 86. A pointer block 88 is connected to the top of the slide rod 87, and a sliding tongue is provided at the bottom of the slide rod 87. A compression spring is provided between the pointer block 88 and the slider 86. The lead screw 84 is provided with a threaded groove, and the slide rod 87... The sliding tongue is slidably connected to the threaded groove of the lead screw 84. When the internal threaded cylinder 65 rotates, the toothed ring 83 on its outer wall drives the meshing gear 82 to rotate. The worm 81 connected to the gear 82 rotates accordingly. The worm 81 meshes with the worm wheel 85, thereby driving the lead screw 84 to rotate. The compression spring applies a pulling force to the pointer block 88 and the slide bar 87 in the direction close to the lead screw 84, ensuring that the sliding tongue is tightly pressed against the threaded groove. Because the threaded groove and the sliding tongue cooperate, when the lead screw 84 rotates, it will push the slider 86 to move along the axial direction of the lead screw 84. When the slider 86 moves, it drives the slide bar 87 to move. The slide bar 87 drives the pointer block 88 to move synchronously. Therefore, the amount of grease in the shaft 1 can be determined by the distance the pointer block 88 moves.

[0052] It is worth mentioning that you should refer to Figure 11 , Figure 12 A scale plate 89 is installed on the shaft 1. The slide rod 87 is slidably connected to the scale plate 89. A pull ring is provided on the top of the pointer block 88. The scale plate 89 is provided with scale lines. The scale lines on the scale plate 89 correspond to the amount of grease remaining in the shaft 1. By observing the scale indicated by the pointer block 88, the amount of grease remaining in the shaft 1 can be intuitively judged. When the amount of grease remaining in the shaft 1 is insufficient, it should be replenished in time. After replenishment, the pointer block 88 is pulled by the pull ring, causing the pointer block 88 to drive the slide rod 87 and the sliding tongue to move away from the lead screw 84, so that the sliding tongue is disengaged from the thread groove. At this time, the position of the pointer block 88 can be manually moved to the starting scale of the scale line. After releasing the pull ring, the elastic force of the compression spring makes the sliding tongue fit tightly against the thread groove again. Example 3

[0053] Please see Figure 1 , Figure 13A self-lubricating tapered pin machining device includes an operating table 11, on which a mounting base 12 is installed. The mounting base 12 is equipped with a spindle assembly 13, a tool feed assembly 14, and a hole machining assembly 15. The spindle assembly 13 clamps and drives a shaft 1 to rotate. The tool feed assembly 14 drives a tool to feed towards the shaft 1 to complete the cutting process. The hole machining assembly 15 performs hole drilling and internal thread machining. This self-lubricating tapered pin machining device is used for machining shafts 1, but is not limited to machining shafts 1; it can also be used to machine other shaft-type parts. The spindle assembly 13 firmly fixes the shaft 1 using a clamping structure such as a chuck, and drives the shaft 1 to rotate at a set speed under the action of a drive device, providing the basic motion for cutting. The tool feed assembly 14 can be adjusted according to machining requirements. The machine tool is precisely fed axially or radially towards the shaft 1 to complete cutting processes such as outer diameter, conical surface, and step, ensuring that the external dimensions of the shaft 1 meet the design requirements. The hole machining component 15 is equipped with a drill bit and tap, which, through precise positioning and feeding, machine through holes and blind holes that meet specifications on the shaft 1, and complete internal thread machining, ensuring the accuracy of the hole system and threads. This equipment can not only efficiently process the shaft 1, but also, due to the versatility and adjustability of its components, can be adapted to the processing of shaft parts of different diameters and lengths by changing the clamping fixtures and adjusting the tool type and parameters, achieving multi-purpose use. This not only improves the utilization rate of the equipment, but also reduces the procurement cost of various special equipment for enterprises, meets the diverse processing needs of shaft parts, and has strong practicality and economy.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A self-lubricating tapered pin, characterized in that, include: Shaft (1), with two fixing plates (2) installed at the top end of the shaft (1) and a pin (3) connected to the bottom end of the shaft (1); A lubrication assembly (6) is provided on the shaft (1). The lubrication assembly (6) includes a sleeve (61), a piston (64), and an internal threaded cylinder (65). The sleeve (61) is rotatably connected to the outer wall of the shaft (1), and the internal threaded cylinder (65) is rotatably connected to the inner wall of the sleeve (61). The shaft (1) can be filled with grease. The shaft (1) is provided with two oil passages (66). The sleeve (61) is provided with an annular groove (67). Multiple overflow grooves are provided between the annular groove (67) and the outer wall of the sleeve (61). The piston (64) is used to squeeze out grease. The lubrication assembly (6) also includes a self-lubricating part (7), which can automatically squeeze out grease from the piston (64) when there is insufficient lubrication between the sleeve (61) and the structural hinge; The lubrication assembly (6) also includes a display unit (8) for displaying the remaining amount of grease in the shaft (1); The self-lubricating part (7) includes two outer fixing blocks (71) and two inner fixing blocks (72). The two outer fixing blocks (71) are fixedly installed on the sleeve (61), and the two inner fixing blocks (72) are fixedly installed on the shaft (1). Arc springs (73) are connected between the two outer fixing blocks (71) and the two inner fixing blocks (72). An elastic telescopic rod (74) is installed inside the outer fixing block (71). A ratchet block (75) is connected to the elastic telescopic rod (74). A ratchet ring (76) is connected to the outer wall of the internal threaded cylinder (65). The two ratchet blocks (75) are engaged with the ratchet ring (76) in one direction. The display unit (8) includes a worm gear (81), which is rotatably mounted inside a shaft (1). A gear (82) is connected to the worm gear (81). A toothed ring (83) is connected to the outer wall of the internal threaded cylinder (65). The toothed ring (83) meshes with the gear (82). A lead screw (84) is rotatably mounted inside the shaft (1). A worm wheel (85) is mounted on the lead screw (84). The worm wheel (85) meshes with the worm gear (81). A slider (86) is slidably connected inside the shaft (1). A slide rod (87) is slidably connected to the inner wall of the slider (86). A pointer block (88) is connected to the top of the slide rod (87). A sliding tongue is provided at the bottom of the slide rod (87). A compression spring is provided between the pointer block (88) and the slider (86). The lead screw (84) is provided with a threaded groove. The sliding tongue of the slide rod (87) is slidably connected to the threaded groove of the lead screw (84).

2. The self-lubricating tapered pin according to claim 1, characterized in that: The lubrication assembly (6) also includes a rotating shaft (62), which is rotatably mounted on the shaft body (1). A key shaft (63) is connected to the rotating shaft (62). The piston (64) is slidably connected to the key shaft (63). The piston (64) is provided with threaded residual teeth, and the threaded residual teeth of the piston (64) are threadedly connected to the internal threaded cylinder (65).

3. A self-lubricating tapered pin according to claim 2, characterized in that: Both of the oil passages (66) are connected to the annular groove (67). An oil inlet is provided in the pin (3). A one-way valve is provided in the oil inlet of the pin (3) and in the two oil passages (66).

4. A self-lubricating tapered pin according to claim 3, characterized in that: The self-lubricating part (7) also includes a locking head (77), which is threaded onto the shaft (1) and abuts against the rotating shaft (62).

5. A self-lubricating tapered pin according to claim 1, characterized in that: A scale plate (89) is installed on the shaft (1), and the slide rod (87) is slidably connected to the scale plate (89).

6. A self-lubricating tapered pin according to claim 5, characterized in that: The pointer block (88) is provided with a pull ring at the top, and the scale plate (89) is provided with scale lines.

7. A self-lubricating tapered pin according to claim 1, characterized in that: It also includes a shoulder (4), on which a fixing pin (5) is slidably connected. The pin (3) is provided with a through hole, and the pin (3) can be inserted into the shoulder (4). The fixing pin (5) can be inserted into the through hole of the pin (3).

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