Wear resistant seal engine tooth rod cap

Abstract

The application discloses a kind of anti-abrasion sealing engine rack protector, belong to engine rack protection technical field, this anti-abrasion sealing engine rack protector, including rack mechanism, shell mechanism, sealing washer mechanism, tightening mechanism, elastic self-locking mechanism, sealing cover mechanism and self-adapting sealing mechanism, one end outside of the rack mechanism is provided with shell mechanism.The application is sealed by the setting of sealing washer mechanism, tightening mechanism and elastic self-locking mechanism, realizes the sealing protection of engine rack and engine shell junction, and realizes elastic self-locking, so as to automatically compensate the gap between sealing ring and rack, provide long-acting maintenance-free sealing protection, the application is set by shell mechanism, sealing cover mechanism and self-adapting sealing mechanism, eliminates the non-sealing gap at rack connecting component sliding channel, so that the device can provide overall protection to rack without affecting the expansion of rack.

Description

Technical Field

[0001] This invention belongs to the field of engine rack protection technology, specifically relating to a wear-resistant and sealing engine rack cap. Background Technology

[0002] The engine is the core power unit that converts heat energy into mechanical energy. The engine rack (speed control rack) is a key transmission component for fuel injection and speed control, responsible for precisely regulating the fuel supply, which directly determines power output and operational stability. The rack operates under high-frequency reciprocating motion and in an environment of oil and dust, making it prone to wear, jamming, deformation, or corrosion. Failure can lead to uncontrolled fuel supply, unstable speed, and in severe cases, damage to the entire engine. Proper rack protection isolates impurities, reduces wear, ensures precise operation, maintains the reliability of the speed control system, and lowers failure and maintenance costs, thus being essential for the safe and stable operation of the engine.

[0003] In existing technologies, sealing protection at the connection between the rack and the engine is mostly achieved through sealing rings, or through an integrated protective cover. However, protective structures relying solely on sealing rings lack an automatic sealing ring tightening mechanism. As the rack operates, the sealing ring is prone to gaps due to expansion, loosening, wear, or deformation, allowing dust and moisture to enter and causing the rack to jam. Therefore, the reliability and lifespan are low, and it cannot provide a reliable and long-lasting maintenance-free seal, resulting in frequent maintenance by personnel.

[0004] Since the engine rack itself needs to be connected to external operating mechanisms such as speed control levers or speed control cables, and is protected by an overall protective cover, it is necessary to open grooves or through holes for these connecting mechanisms to avoid interfering with the extension and retraction of the engine rack. These grooves or through holes will damage the sealing performance of the protective cover itself. Moreover, most existing protective covers do not have a structure that can self-seal as the connecting mechanism moves, which makes it easy for external dust, sand particles and other impurities to enter the inside of the protective cover with the airflow and adhere to the rack, thereby causing wear on the rack and the sealing ring. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a wear-resistant and sealing engine rack cap.

[0006] The technical solution adopted to solve the above technical problems is: a wear-resistant sealing engine rack protector, including a rack mechanism, a housing mechanism, a sealing washer mechanism, a tightening mechanism, an elastic self-locking mechanism, a sealing cover mechanism, and an adaptive sealing mechanism. The rack mechanism is externally provided with a housing mechanism at one end, the housing mechanism is embedded with a sealing washer mechanism on its inner side, and the sealing washer mechanism is externally provided with a tightening mechanism. The tightening mechanism includes a metal tightening clamp, one end of which is fixed with a positioning bushing, and the other end of which is fixed with an internal thread groove. A semi-threaded rod is threadedly connected to the inner side of the internal thread groove.

[0007] The housing mechanism is rotatably connected to an elastic self-locking mechanism, which includes a rotating connecting sleeve. One end of the rotating connecting sleeve is fixed with a pre-tightening adjusting plate. The pre-tightening adjusting plate has multiple limiting pin holes and a pre-tightening torsion spring is also fixed on the pre-tightening adjusting plate.

[0008] A sealing cover mechanism is screwed onto the housing mechanism. An adaptive sealing mechanism is slidably connected to the inner side of the sealing cover mechanism. The adaptive sealing mechanism includes a sliding plate. A strip slider is fixed at both the upper and lower ends of the sliding plate. A first corrugated sealing sheet is connected to one end of the sliding plate, and a second corrugated sealing sheet is connected to the other end of the sliding plate.

[0009] Furthermore, the rack mechanism includes a rack body, one end of which is fixed with a through-hole connecting rod.

[0010] With the above technical solution, the rack body is installed in the engine fuel injection pump body. The rack body can drive the plunger to rotate through axial movement. The perforated connecting rod can be connected to the speed control lever or speed control cable to realize linkage with the speed control mechanism or control components, ensuring stable and reliable fuel supply regulation.

[0011] Furthermore, the housing mechanism includes a housing body sleeved on the outside of one end of the rack body, a plurality of connecting lugs fixed on the housing body, a connecting seat fixed on the outside of the housing body, and a rotating connecting groove formed on the connecting seat.

[0012] Through the above technical solution, the housing body covers the exposed end of the rack body, which can prevent dust and debris from getting stuck, avoid obstruction of the rack body's movement, and at the same time play a role in preventing bumps and oil contamination, thereby ensuring smooth fuel supply regulation. The connecting lugs can be used to fix the housing body to the engine.

[0013] Furthermore, a sealing gasket groove is integrally formed on the inner side of one end of the housing body, and a reverse edge structure is integrally fixed on one end of the sealing gasket groove. A rectangular mounting base is fixed on the outside of the housing body, and a sealing gasket groove is formed on the rectangular mounting base.

[0014] Through the above technical solutions, the sealing gasket groove can be used to embed and install the sealing gasket mechanism, the reverse edge structure can limit the sealing gasket mechanism and prevent the sealing gasket mechanism from moving axially, and the rectangular mounting base can be used to install the sealing cover mechanism.

[0015] Furthermore, the sealing gasket mechanism includes a sealing gasket body embedded in the sealing gasket groove, an annular groove is formed on the outside of the sealing gasket body, and a plurality of annular sealing ribs are integrally formed on one end of the sealing gasket body, and the plurality of annular sealing ribs are all arranged concentrically.

[0016] With the above technical solution, one end of the sealing gasket body is slightly higher than the end face of the housing body. When the device is installed on the engine, this end of the sealing gasket body will be in close contact with the surface of the engine housing, thereby preventing dust, oil and water from entering from the contact surface between the housing body and the engine housing. Multiple annular sealing ribs can form multiple sealing defenses step by step, enhancing sealing reliability, while increasing local specific pressure, compensating for uneven contact surfaces, effectively preventing oil and gas and medium leakage, and improving sealing stability.

[0017] Furthermore, the metal tightening sleeve is located outside the annular groove, one end of the semi-threaded rod is rotatably connected to the positioning bushing, the positioning bushing limits the axial movement of the semi-threaded rod, and the other end of the semi-threaded rod is fixed with a hand-tightening knob head, on which a spring pin passes.

[0018] With the above technical solution, when the knob is turned counterclockwise, the semi-threaded rod will be driven to rotate counterclockwise, causing the internal thread groove to slide along the semi-threaded rod towards the positioning sleeve, thereby tightening the metal tightening clamp and achieving radial compression of the sealing gasket body. This improves the tightness of the fit between the inner side of the sealing gasket body and the outer side of the toothed rod body, thus improving the sealing effect.

[0019] Furthermore, the rotating connecting sleeve is rotatably connected to the rotating connecting groove, the rotating connecting groove axially limits the rotating connecting sleeve, the plurality of limiting pin holes are arranged in an equidistant circumferential array, and the end of the pre-tightening torsion spring away from the pre-tightening adjusting plate is fixed to the connecting seat.

[0020] Through the above technical solution, the semi-threaded rod passes through the rotating connecting sleeve, which can rotate relative to the rotating connecting groove without falling off. When the user turns the pre-tightening adjustment piece clockwise, it can apply force to the pre-tightening torsion spring. After the user pulls up the spring pin on the hand-tightening knob, they can turn the pre-tightening adjustment piece. When the pre-tightening adjustment piece is turned to the appropriate force, the user can release the spring pin and allow it to engage with the corresponding limit pin hole. At this time, the pre-tightening adjustment piece is synchronized with the hand-tightening knob through the spring pin, and the pre-tightening torsion spring relies on its own restoring elasticity to adjust the pre-tightening adjustment. The segment applies counterclockwise torque. Therefore, when the inner side of the sealing gasket mechanism tends to expand and loosen due to internal pressure or temperature expansion, the pre-tightening torsion spring will drive the hand-tightening knob to rotate counterclockwise, thereby automatically tightening the metal tightening ring. This automatically compensates for the gap caused by the expansion, loosening, wear or deformation of the sealing ring, and continuously applies radial clamping force to the sealing ring, ensuring that it always keeps in close contact with the mating surface. This ensures reliable and long-lasting sealing, avoids sealing failure due to loosening or expansion of the sealing ring, and achieves long-lasting maintenance-free sealing.

[0021] Furthermore, the sealing cover mechanism includes a cover body screwed to a rectangular mounting base, the cover body having a strip-shaped slot, and limit grooves at both the upper and lower ends of the inner side of the cover body. A sealing gasket body is glued and fixed to one end of the cover body, and the sealing gasket body is embedded in the inner side of the sealing gasket groove.

[0022] Through the above technical solution, the cover body covers the opening of the rectangular mounting base, the sealing gasket body ensures the sealing of the mating surface between the cover body and the rectangular mounting base, and the perforated connecting rod passes through the strip-shaped slot, providing space for the perforated connecting rod to move axially along the rack body, thereby avoiding affecting the extension and retraction of the rack body.

[0023] Furthermore, the strip slider is slidably connected to the limiting groove, the end of the first corrugated sealing sheet is fixedly connected to one side of the inner wall of the cover body to form a sealing fit, and the second corrugated sealing sheet is fixedly connected to the other side of the inner wall of the cover body to form a sealing fit.

[0024] Through the above technical solution, the corrugated structure of the first and second corrugated sealing sheets enables them to expand and contract. Furthermore, the upper and lower surfaces of the first and second corrugated sealing sheets are tightly attached to the upper and lower inner walls of the cover body, so that the connection between the first and second corrugated sealing sheets and the cover body can maintain good sealing performance during the expansion and contraction process.

[0025] Furthermore, the sliding plate has a connecting rod through hole, and a sealing ring is embedded and fixed inside the connecting rod through hole. The connecting rod through hole allows the perforated connecting rod to pass through, and the sealing ring is tightly fitted to the outer periphery of the perforated connecting rod, forming an effective seal with the perforated connecting rod.

[0026] With the above technical solution, when the perforated connecting rod moves axially along the rack body, the sliding plate and the strip slider will also slide along the limiting groove. At the same time, the first and second corrugated sealing plates will adapt to the position change of the sliding plate, ensuring that both ends of the sliding plate are always sealed. Thus, without affecting the movement of the rack body and the perforated connecting rod, it provides all-round sealing protection for the rack mechanism, eliminates the airflow channel connecting the perforated connecting rod to the outside, and effectively improves the protective effect of the device.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. This invention achieves sealing protection at the connection between the engine rack and the engine housing by setting up a sealing gasket mechanism, a tightening mechanism and an elastic self-locking mechanism, and achieves elastic self-locking, thereby automatically compensating for the gap between the sealing ring and the rack, and providing long-term maintenance-free sealing protection;

[0029] 2. By setting up a housing mechanism, a sealing cover mechanism, and an adaptive sealing mechanism, the present invention eliminates the non-sealed gaps at the sliding channel of the rack connecting component, enabling the device to provide overall protection for the rack without affecting its extension and retraction. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the rack and pinion mechanism of the present invention;

[0032] Figure 3 This is a schematic diagram of the housing mechanism of the present invention;

[0033] Figure 4 This is a partial cross-sectional view of the housing mechanism of the present invention;

[0034] Figure 5 This is a partial cross-sectional structural schematic diagram of the rack mechanism, housing mechanism, sealing gasket mechanism, tightening mechanism, elastic self-locking mechanism, sealing cover mechanism and adaptive sealing mechanism of the present invention.

[0035] Figure 6 This is a schematic diagram of the sealing gasket mechanism of the present invention;

[0036] Figure 7 This is a schematic diagram of the tightening mechanism structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the elastic self-locking mechanism of the present invention;

[0038] Figure 9This is a schematic diagram of the sealing cover mechanism of the present invention;

[0039] Figure 10 This is a schematic diagram of the adaptive sealing mechanism of the present invention.

[0040] Reference numerals: 1. Gear mechanism; 101. Gear body; 102. Perforated connecting rod; 2. Housing mechanism; 201. Housing body; 202. Connecting lug; 203. Connecting seat; 204. Rotary connecting groove; 205. Sealing gasket groove; 206. Reverse edge structure; 207. Rectangular mounting seat; 208. Sealing gasket groove; 3. Sealing gasket mechanism; 301. Sealing gasket body; 302. Annular groove; 303. Annular sealing rib; 4. Tightening mechanism; 401. Metal tightening clamp; 402. Positioning bushing; 403. Internal thread groove; 40 4. Semi-threaded rod; 405. Hand-tightening knob head; 406. Spring pin; 5. Elastic self-locking mechanism; 501. Rotary connecting sleeve; 502. Pre-tightening adjusting plate; 503. Limiting pin hole; 504. Pre-tightening torsion spring; 6. Sealing cover mechanism; 601. Cover body; 602. Strip-shaped slot; 603. Limiting slide groove; 604. Sealing gasket body; 7. Adaptive sealing mechanism; 701. Sliding plate; 702. Strip-shaped slider; 703. First corrugated sealing sheet; 704. Second corrugated sealing sheet; 705. Connecting rod through hole; 706. Sealing ring. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] like Figures 1-10 As shown, a wear-resistant sealing engine rack cap includes a rack mechanism 1, a housing mechanism 2, a sealing washer mechanism 3, a tightening mechanism 4, an elastic self-locking mechanism 5, a sealing cover mechanism 6, and an adaptive sealing mechanism 7. The rack mechanism 1 includes a rack body 101, one end of which is fixed with a perforated connecting rod 102. The rack body 101 is installed in the engine fuel injection pump body. The rack body 101 can drive the plunger to rotate through axial movement. The perforated connecting rod 102 can be connected to a speed control lever or speed control cable to achieve linkage with the speed control mechanism or control components, ensuring stable and reliable fuel supply regulation.

[0043] like Figure 1 , Figure 3 and Figure 4As shown, a housing mechanism 2 is provided on the outside of one end of the rack mechanism 1. The housing mechanism 2 includes a housing body 201 sleeved on the outside of one end of the rack body 101. Multiple connecting lugs 202 are fixed on the housing body 201. A connecting seat 203 is fixed on the outside of the housing body 201. A rotating connecting groove 204 is provided on the connecting seat 203. A sealing gasket groove 205 is integrally formed on the inner side of one end of the housing body 201. A reverse edge structure 206 is integrally fixed on one end of the sealing gasket groove 205. A rectangular mounting seat 207 is fixed on the outside of the housing body 201. The rectangular mounting seat 207 has an opening on it. The device includes a sealing gasket groove 208, with the housing body 201 covering the exposed end of the rack body 101. This prevents dust and debris from getting stuck, avoids obstruction of the rack body 101's movement, and also protects against impacts and oil contamination, thus ensuring smooth oil supply regulation. The connecting lug 202 can be used to fix the housing body 201 to the engine. The sealing gasket groove 205 can be used to embed and install the sealing gasket mechanism 3. The anti-edge structure 206 can limit the sealing gasket mechanism 3 to prevent axial movement. The rectangular mounting base 207 can be used to install the sealing cover mechanism 6.

[0044] like Figure 1 , Figure 5 and Figure 6 As shown, a sealing gasket mechanism 3 is embedded inside the housing mechanism 2. The sealing gasket mechanism 3 includes a sealing gasket body 301 embedded inside the sealing gasket groove 205. An annular groove 302 is formed on the outside of the sealing gasket body 301. Multiple annular sealing ribs 303 are integrally formed on one end of the sealing gasket body 301. The multiple annular sealing ribs 303 are all arranged concentrically. One end of the sealing gasket body 301 is slightly higher than the end face of the housing body 201. When the device is installed on the engine, this end of the sealing gasket body 301 will be in close contact with the surface of the engine housing, thereby preventing dust, oil and water from entering from the contact surface between the housing body 201 and the engine housing. The multiple annular sealing ribs 303 can form multiple sealing defenses step by step, enhancing the sealing reliability, while increasing the local specific pressure, compensating for uneven contact surfaces, effectively preventing oil and gas and medium leakage, and improving sealing stability.

[0045] like Figure 1 , Figure 5 and Figure 7As shown, a tightening mechanism 4 is fitted around the sealing gasket mechanism 3. The tightening mechanism 4 includes a metal tightening clamp 401. One end of the metal tightening clamp 401 is fixed with a positioning bushing 402, and the other end of the metal tightening clamp 401 is fixed with an internal thread groove 403. A semi-threaded rod 404 is threadedly connected to the inner side of the internal thread groove 403. The metal tightening clamp 401 is fitted around the annular groove 302. One end of the semi-threaded rod 404 is rotatably connected to the positioning bushing 402. The positioning bushing 402 axially limits the semi-threaded rod 404. The other end of 404 is fixed with a hand-tightening knob head 405. A spring pin 406 is threaded through the hand-tightening knob head 405. When the hand-tightening knob head 405 is rotated counterclockwise, the semi-threaded rod 404 will be driven to rotate counterclockwise, thereby causing the internal thread groove 403 to slide along the semi-threaded rod 404 toward the positioning sleeve 402, which in turn causes the metal tightening clamp 401 to tighten, thereby achieving radial compression of the sealing gasket body 301, improving the tightness of the fit between the inner side of the sealing gasket body 301 and the outer side of the toothed rod body 101, and improving the sealing effect.

[0046] like Figure 1 , Figure 5 and Figure 8As shown, an elastic self-locking mechanism 5 is rotatably connected to the housing mechanism 2. The elastic self-locking mechanism 5 includes a rotating connecting sleeve 501. A pre-tightening adjusting plate 502 is fixed to one end of the rotating connecting sleeve 501. The pre-tightening adjusting plate 502 has multiple limiting pin holes 503. A pre-tightening torsion spring 504 is also fixed to the pre-tightening adjusting plate 502. The rotating connecting sleeve 501 is rotatably connected to the rotating connecting groove 204, and the rotating connecting groove 204 axially limits the rotating connecting sleeve 501. Multiple limiting pin holes 503 are arranged in an equidistant circular array. The end of the pre-tensioning torsion spring 504 away from the pre-tensioning adjusting plate 502 is fixed to the connecting seat 203. The semi-threaded rod 404 passes through the rotating connecting sleeve 501, which can rotate relative to the rotating connecting groove 204 without falling off. When the user turns the pre-tensioning adjusting plate 502 clockwise, it can tighten the pre-tensioning torsion spring 504. The user can turn the pre-tensioning torsion spring 504 by pulling up the spring pin 406 on the hand-tightening knob head 405. When the pre-tightening adjustment plate 502 is tightened to a suitable force, the user can loosen the spring pin 406 and allow the spring pin 406 to engage with the corresponding limit pin hole 503. At this time, the pre-tightening adjustment plate 502 is synchronized with the hand-tightening knob head 405 through the spring pin 406. The pre-tightening torsion spring 504 applies counterclockwise torque to the pre-tightening adjustment plate 502 based on its own restoring elasticity. Therefore, when the inner side of the sealing gasket mechanism 3 tends to expand and loosen due to internal pressure or temperature expansion, the pre-tightening torsion spring 504 will drive the hand-tightening knob head 405 to rotate counterclockwise, thereby automatically tightening the metal tightening clamp 401. This automatically compensates for the gap caused by expansion, loosening, wear or deformation of the sealing ring, and continuously applies radial clamping force to the sealing ring, ensuring that it always keeps in close contact with the mating surface. This ensures reliable and long-lasting sealing, avoids sealing failure due to loosening or expansion of the sealing ring, and achieves long-lasting maintenance-free sealing.

[0047] like Figure 1 , Figure 5 and Figure 9 As shown, a sealing cover mechanism 6 is screwed onto the housing mechanism 2. The sealing cover mechanism 6 includes a cover body 601 screwed onto a rectangular mounting base 207. The cover body 601 has a strip-shaped slot 602. Limiting grooves 603 are provided at both the upper and lower ends of the inner side of the cover body 601. A sealing gasket body 604 is glued and fixed to one end of the cover body 601. The sealing gasket body 604 is embedded in the inner side of the sealing gasket groove 208. The cover body 601 covers the opening of the rectangular mounting base 207. The sealing gasket body 604 ensures the sealing of the contact surface between the cover body 601 and the rectangular mounting base 207. The perforated connecting rod 102 passes through the strip-shaped slot 602, providing space for the perforated connecting rod 102 to move axially along the rack body 101, thereby avoiding affecting the extension and retraction of the rack body 101.

[0048] like Figure 1 , Figure 5 and Figure 10 As shown, an adaptive sealing mechanism 7 is slidably connected to the inner side of the sealing cover mechanism 6. The adaptive sealing mechanism 7 includes a sliding plate 701, with strip sliders 702 fixed at both the upper and lower ends of the sliding plate 701. A first corrugated sealing sheet 703 is connected to one end of the sliding plate 701, and a second corrugated sealing sheet 704 is connected to the other end of the sliding plate 701. The strip sliders 702 are slidably connected to the limiting groove 603, and the end of the first corrugated sealing sheet 703 is fixedly connected to the inner wall of one side of the cover body 601. The first corrugated sealing sheet 704 and the second corrugated sealing sheet 704 are fixedly connected to the inner wall of the other side of the cover body 601 to form a sealed fit. The sliding plate 701 has a connecting rod through hole 705. A sealing ring 706 is embedded and fixed inside the connecting rod through hole 705. The connecting rod through hole 705 allows the perforated connecting rod 102 to pass through. The sealing ring 706 is tightly fitted to the outer periphery of the perforated connecting rod 102 and forms an effective seal with the perforated connecting rod 102. The first corrugated sealing sheet 703 and the second corrugated sealing sheet 704 form a sealed fit. The corrugated structure of the corrugated sealing sheet 704 enables it to expand and contract. Furthermore, both the upper and lower surfaces of the first corrugated sealing sheet 703 and the second corrugated sealing sheet 704 are tightly fitted to the upper and lower inner walls of the cover body 601, ensuring good sealing at the connection points with the cover body 601 during expansion and contraction. When the perforated connecting rod 102 moves axially along the rack body 101, the sliding plate 701 and the strip slider 702 also slide along the limiting groove 603. Simultaneously, the first corrugated sealing sheet 703 and the second corrugated sealing sheet 704 adapt to the position change of the sliding plate 701, ensuring that both ends of the sliding plate 701 remain sealed. This provides comprehensive sealing protection for the rack mechanism 1 without affecting the movement of the rack body 101 and the perforated connecting rod 102, eliminating the airflow channel between the perforated connecting rod 102 and the outside environment, effectively improving the protective effect of the device.

[0049] The working principle of this embodiment is as follows: the user tightens the tightening mechanism 4 through the elastic self-locking mechanism 5, so that the device self-locks the sealing gasket mechanism 3, thereby achieving a long-term maintenance-free seal. The housing mechanism 2 and the adaptive sealing mechanism 7 provide comprehensive protection for the exposed end of the rack mechanism 1, and do not affect the telescopic movement of the rack mechanism 1 or the connection between the rack mechanism 1 and the speed regulating lever or speed regulating cable, thereby preventing impurities such as sand, dust and oil from adhering to the rack and causing wear of the sealing gasket mechanism 3 as the rack moves.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A wear-resistant sealing engine rack protector, comprising a rack mechanism (1), a housing mechanism (2), a sealing washer mechanism (3), a tightening mechanism (4), an elastic self-locking mechanism (5), a sealing cover mechanism (6), and an adaptive sealing mechanism (7), characterized in that: One end of the rack mechanism (1) is provided with a housing mechanism (2), and a sealing gasket mechanism (3) is embedded in the inner side of the housing mechanism (2). A tightening mechanism (4) is sleeved on the outside of the sealing gasket mechanism (3). The tightening mechanism (4) includes a metal tightening clamp (401). One end of the metal tightening clamp (401) is fixed with a positioning bushing (402), and the other end of the metal tightening clamp (401) is fixed with an internal thread groove (403). A semi-threaded rod (404) is threadedly connected to the inner side of the internal thread groove (403). The housing mechanism (2) is rotatably connected to an elastic self-locking mechanism (5). The elastic self-locking mechanism (5) includes a rotating connecting sleeve (501). One end of the rotating connecting sleeve (501) is fixed with a pre-tightening adjusting plate (502). The pre-tightening adjusting plate (502) is provided with multiple limiting pin holes (503). The pre-tightening adjusting plate (502) is also fixed with a pre-tightening torsion spring (504). The housing mechanism (2) is screwed to a sealing cover mechanism (6), and an adaptive sealing mechanism (7) is slidably connected to the inner side of the sealing cover mechanism (6). The adaptive sealing mechanism (7) includes a sliding plate (701), and strip sliders (702) are fixed at both the upper and lower ends of the sliding plate (701). A first corrugated sealing sheet (703) is connected to one end of the sliding plate (701), and a second corrugated sealing sheet (704) is connected to the other end of the sliding plate (701).

2. The anti-wear sealing engine rack cap according to claim 1, characterized in that, The rack mechanism (1) includes a rack body (101), and a perforated connecting rod (102) is fixed at one end of the rack body (101).

3. The anti-wear sealing engine rack cap according to claim 2, characterized in that, The housing mechanism (2) includes a housing body (201) sleeved on the outside of one end of the rack body (101), a plurality of connecting lugs (202) are fixed on the housing body (201), and a connecting seat (203) is fixed on the outside of the housing body (201), and a rotating connecting groove (204) is provided on the connecting seat (203).

4. The anti-wear sealing engine rack cap according to claim 3, characterized in that, A sealing gasket groove (205) is integrally formed on the inner side of one end of the housing body (201). A reverse edge structure (206) is integrally fixed on one end of the sealing gasket groove (205). A rectangular mounting base (207) is fixed on the outside of the housing body (201). A sealing gasket groove (208) is provided on the rectangular mounting base (207).

5. The anti-wear sealing engine rack cap according to claim 4, characterized in that, The sealing gasket mechanism (3) includes a sealing gasket body (301) embedded in the sealing gasket groove (205). The sealing gasket body (301) has an annular groove (302) on its outside. One end of the sealing gasket body (301) is integrally formed with multiple annular sealing ribs (303), and the multiple annular sealing ribs (303) are all arranged concentrically.

6. The anti-wear sealing engine rack cap according to claim 1, characterized in that, The metal tightening clamp (401) is sleeved outside the annular groove (302). One end of the semi-threaded rod (404) is rotatably connected to the positioning bushing (402). The positioning bushing (402) axially limits the semi-threaded rod (404). The other end of the semi-threaded rod (404) is fixed with a hand-tightening knob head (405). A spring pin (406) is threaded through the hand-tightening knob head (405).

7. The anti-wear sealing engine rack cap according to claim 1, characterized in that, The rotating connecting sleeve (501) is rotatably connected to the rotating connecting groove (204), the rotating connecting groove (204) axially limits the rotating connecting sleeve (501), the plurality of limiting pin holes (503) are arranged in an equidistant circumferential array, and the end of the pre-tightening torsion spring (504) away from the pre-tightening adjusting plate (502) is fixed to the connecting seat (203).

8. A wear-resistant sealing engine rack cap according to claim 4, characterized in that, The sealing cover mechanism (6) includes a cover body (601) screwed onto a rectangular mounting base (207). The cover body (601) has a strip-shaped slot (602). Limiting grooves (603) are provided at both the upper and lower ends of the inner side of the cover body (601). A sealing gasket body (604) is glued and fixed to one end of the cover body (601). The sealing gasket body (604) is embedded in the inner side of the sealing gasket groove (208).

9. A wear-resistant sealing engine rack cap according to claim 1, characterized in that, The strip slider (702) is slidably connected to the limiting groove (603), the end of the first corrugated sealing sheet (703) is fixedly connected to one side of the inner wall of the cover body (601) and forms a sealing fit, and the second corrugated sealing sheet (704) is fixedly connected to the other side of the inner wall of the cover body (601) and forms a sealing fit.

10. A wear-resistant sealing engine rack cap according to claim 1, characterized in that, The sliding plate (701) has a connecting rod through hole (705). A sealing ring (706) is embedded and fixed inside the connecting rod through hole (705). The connecting rod through hole (705) allows the perforated connecting rod (102) to pass through. The sealing ring (706) fits tightly against the outer periphery of the perforated connecting rod (102) and forms an effective seal with the perforated connecting rod (102).

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