Novel hydraulic bevel wheel tensioner

Abstract

The utility model relates to the field of tensioners, in particular to a novel hydraulic bevel wheel tensioner. The utility model aims to solve the technical problems that an oil seal in a hydraulic tensioner may be damaged due to external impurities to cause oil leakage, and the oil leakage can reduce a medium for transmitting pressure, so that the tensioning force is reduced or no tensioning force exists, and the performance of an engine is influenced. The tensioner mainly aims at timing belts with various specifications in width, and bevel wheels with different specifications and sizes need to be mounted for the timing belts with different specifications and sizes, so that the universality of the bevel wheels is reduced, and the mounting and adjusting time is prolonged. Comprising a fixing plate, a tensioning mechanism is arranged on one side of the fixing plate, a one-way valve is arranged on the upper side of the tensioning mechanism, and a bevel wheel mechanism is arranged at the lower end of the fixing plate. By arranging the tensioning mechanism, the dustproof sealing ring isolates external impurities outside the cylinder body, the liquid-proof sealing ring on the outer side of the piston is prevented from being damaged by the external impurities, and the internal pressure of the cylinder body is kept.

Description

Technical Field

[0001] The utility model relates to the field of tensioners, in particular to a novel hydraulic inclined wheel tensioner. Background Art

[0002] A hydraulic bevel pulley tensioner is a belt tensioning device that combines hydraulic technology with a bevel pulley design. It is used to automatically adjust the belt tension in a vehicle's transmission system. It offers advantages such as automatic adjustment, rapid response, precise and stable operation, reduced noise, and extended belt life. As a critical component in the vehicle's transmission system, its performance and reliability are crucial to the proper operation of the engine.

[0003] In the existing technology, the oil seal in the hydraulic tensioner may be damaged by external impurities, resulting in oil leakage. The oil leakage will reduce the medium for transmitting pressure, thereby resulting in reduced tensioning force or no tensioning force, affecting engine performance. The tensioner is mainly used for timing belts. Timing belts have various specifications in width. In response to timing belts of different specifications and sizes, bevel pulleys of different specifications and sizes need to be installed, which reduces the versatility of the bevel pulleys and prolongs the installation and adjustment time. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] The present invention aims to overcome the problem that the oil seal in the hydraulic tensioner may be damaged by external impurities and cause oil leakage. The oil leakage will reduce the medium for transmitting pressure, thereby resulting in reduced tensioning force or no tensioning force, affecting engine performance. The tensioner is mainly used for timing belts. Timing belts have various specifications in width. In the face of timing belts of different specifications and sizes, bevel wheels of different specifications and sizes need to be installed, resulting in reduced versatility of the bevel wheels and prolonged installation and adjustment time. The technical problem to be solved by the present invention is to provide a new hydraulic bevel wheel tensioner.

[0006] (2) Technical solution

[0007] The cam is secured to the bottom of the cam, and the cam has a central position which allows the cam to move freely in the cam's upper and lower ends of the cam, and the cam has a central position which allows the cam to move freely in the cam's lower end.

[0008] Preferably, the tensioning mechanism also includes four limit columns, one end of the limit column is fixedly connected to the partition, and the other end of the limit column is fixedly connected to the limit plate. A circular hole is opened on the side of the partition close to the limit plate, and a sealing ball is slidably connected in the circular hole. A limit spring is fixedly connected between the sealing ball and the limit plate.

[0009] Preferably, the tensioning mechanism also includes two connecting plates, the two connecting plates are fixedly connected to the cylinder body, a fluid replenishing cylinder is fixedly connected between the inner side surfaces of the upper ends of the two connecting plates, a connecting pipe is fixedly connected to the side surface of the fluid replenishing cylinder, the other end of the connecting pipe is connected to the cylinder body, and a connecting seat is fixedly connected to the side surface of the other end of the cylinder body.

[0010] Preferably, the one-way valve includes a valve body, which is fixedly connected to the fluid replenishing cylinder, and the valve body passes through the fluid replenishing cylinder and is fixedly connected to a filter cover at the end extending to the outside of the fluid replenishing cylinder. A square through hole is opened inside the valve body, and two valves are rotatably connected in the square through hole through a rotating shaft. A blocking block is fixedly connected to the side of the valve, and a blocking spring is fixedly connected to the opposite sides of the two blocking blocks.

[0011] Preferably, the bevel wheel mechanism includes a positioning bolt, which is rotatably connected to the fixing plate, and the outer side of the positioning bolt is slidably connected to the upper bevel wheel and the lower bevel wheel, and an annular groove is provided on the opposite sides of the upper bevel wheel and the lower bevel wheel, and a tension spring is fixedly connected in the annular groove and located between the upper bevel wheel and the lower bevel wheel, and the outer side of the positioning bolt is also slidably connected to a pressure plate, and a compression spring is sleeved on the outer side of the positioning bolt and located between the pressure plate and the upper bevel wheel, the end of the positioning bolt passes through the fixing plate and is threadedly connected to a anti-loosening nut, and an anti-loosening washer is slidably connected to the outer side of the positioning bolt and located between the anti-loosening nut and the fixing plate.

[0012] Preferably, one end of the fixing plate is fixedly connected to a fixing column, two reinforcing ribs are fixedly connected between the side surface of the fixing column and the fixing plate, and the lower end of the fixing plate is fixedly connected to a spare column.

[0013] (3) Beneficial effects

[0014] 1. By setting up a tensioning mechanism, the dustproof seal isolates external impurities outside the cylinder body, preventing the liquid-proof seal ring on the outside of the piston from being damaged by external impurities, maintaining the internal pressure of the cylinder body, and ensuring the tension of the vehicle transmission system belt; hydraulic oil flows from between the cylinder body and the partition plate to between the partition plate and the piston. Based on the principle of liquid incompressibility, the tensioning mechanism provides stable support for the fixed plate, thereby ensuring stable output of the vehicle engine;

[0015] 2. By setting up a bevel wheel mechanism, the belt is clamped between the upper bevel wheel and the lower bevel wheel. The belt pushes the upper and lower bevel wheels to move in opposite directions. The upper and lower bevel wheels move in opposite directions to stretch the tension spring, making it suitable for timing belts of different specifications and sizes, improving the versatility of the bevel wheel and shortening the installation and adjustment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the back structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the tensioning mechanism structure of the utility model;

[0019] Figure 4 This is a cross-sectional view of the cylinder body and the liquid replenishing cylinder of the utility model;

[0020] Figure 5 This is a cross-sectional view of the one-way valve of the present utility model;

[0021] Figure 6 This is a schematic structural diagram of the inclined wheel mechanism of the present utility model.

[0022] The markings in the accompanying drawings are: 1-fixed plate, 2-tensioning mechanism, 201-fixed seat, 202-cylinder rod, 203-cylinder body, 204-connecting seat, 205-connecting plate, 206-liquid replenishing cylinder, 207-piston, 208-dustproof sealing ring, 209-liquid-proof sealing ring, 210-reset spring, 211-partition, 212-sealing ball, 213-limiting column, 214-limiting plate, 215-limiting spring, 216-connecting pipe , 3- inclined wheel mechanism, 301- positioning bolt, 302- pressure plate, 303- compression spring, 304- upper inclined wheel, 305- lower inclined wheel, 306- anti-loosening washer, 307- anti-loosening nut, 308- tension spring, 4- reinforcing rib, 5- fixing column, 6- spare column, 7- fixing bolt, 8- fixing nut, 9- one-way valve, 901- filter cover, 902- valve body, 903- valve, 904- blocking block, 905- blocking spring. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0024] A new type of hydraulic inclined wheel tensioner, such as Figure 1 、 Figure 2 As shown, it includes a fixing plate 1, which is an irregular shape to adapt to the internal space of the engine compartment. A tensioning mechanism 2 is provided on one side of the fixing plate 1. By providing the tensioning mechanism 2, stable support is provided for the fixing plate 1, thereby ensuring the tension of the automobile transmission system belt. A one-way valve 9 is provided on the upper side of the tensioning mechanism 2. By providing the one-way valve 9, the internal pressure of the cylinder body 203 and the fluid replenishing cylinder 206 is stabilized to ensure the smooth operation of the tensioning mechanism 2. A bevel wheel mechanism 3 is provided at the lower end of the fixing plate 1. By providing the bevel wheel mechanism 3, timing belts of different specifications and sizes can be applied, the versatility of the bevel wheel is improved, and the installation and adjustment time of the tensioner is shortened. A fixing bolt 7 is slidably connected to one end of the fixing plate 1. The fixing bolt 7 is an external hexagonal bolt. The fixing bolt 7 passes through the end of the fixing plate 1 and is threadedly connected to a fixing nut 8. A special indentation is provided on the side of the fixing nut 8, so that the fixing nut 8 is deformed when subjected to axial load, thereby increasing the friction between the threads to achieve the purpose of preventing loosening.

[0025] like Figure 2 、 Figure 3 、 Figure 4As shown, the tensioning mechanism 2 includes a fixed seat 201, which is rotatably connected to the fixing bolt 7. The side of the fixed seat 201 is fixedly connected to the cylinder rod 202, and the other end of the cylinder rod 202 is fixedly connected to the piston 207. The arc-shaped outer side of the piston 207 is provided with a circular ring groove, and a liquid-proof sealing ring 209 is provided in the circular ring groove. The liquid-proof sealing ring 209 is a YX-type sealing ring for holes and is made of NBR nitrile rubber. The outer side of the piston 207 is slidably connected to the cylinder body 203, and the inner side of the end of the cylinder body 203 is provided with a circular ring groove. A dustproof sealing ring 208 is provided in the circular ring groove. The dustproof sealing ring 208 is an O-ring made of silicone rubber. The inside of the cylinder body 203 is fixedly connected to a partition 211, and the partition 211 is fixed to the piston 207. It is connected to a return spring 210, and four limit columns 213 are fixedly connected to the side of the partition 211, and the other ends of the four limit columns 213 are fixedly connected to the limit plate 214. A circular hole is opened on the side of the partition 211 close to the limit plate 214, and a sealing ball 212 is slidably connected in the circular hole. A limit spring 215 is fixedly connected between the sealing ball 212 and the limit plate 214, and two connecting plates 205 are fixedly connected to the outside of the cylinder body 203. A fluid replenishing cylinder 206 is fixedly connected between the inner sides of the upper ends of the two connecting plates 205, and hydraulic oil is filled in the fluid replenishing cylinder 206. A connecting pipe 216 is fixedly connected to the side of the fluid replenishing cylinder 206, and the other end of the connecting pipe 216 is connected to the cylinder body 203. The other end side of the cylinder body 203 is fixedly connected to the connecting seat 204.

[0026] like Figure 5 As shown, the one-way valve 9 includes a valve body 902, which is fixedly connected to the fluid replenishing cylinder 206. The valve body 902 passes through the fluid replenishing cylinder 206 and is fixedly connected to a filter cover 901 at the end extending to the outside of the fluid replenishing cylinder 206. The filter cover 901 is made of copper and has multiple filter holes on its surface. A square through hole is provided inside the valve body 902, and two valves 903 are rotatably connected to the square through hole via a rotating shaft. A blocking block 904 is fixedly connected to the side of the valve 903, and a blocking spring 905 is fixedly connected to the opposite sides of the two blocking blocks 904.

[0027] like Figure 6As shown, the inclined wheel mechanism 3 includes a positioning bolt 301, which is rotatably connected to the fixing plate 1. The positioning bolt 301 is an external hexagonal bolt. The outer side of the positioning bolt 301 is slidably connected to the upper inclined wheel 304 and the lower inclined wheel 305. The upper inclined wheel 304 and the lower inclined wheel 305 are frustum bodies, and the upper bottom surfaces are relatively arranged. The upper inclined wheel 304 and the lower inclined wheel 305 have an annular groove on the opposite side. A tension spring 308 is fixedly connected in the annular groove and located between the upper inclined wheel 304 and the lower inclined wheel 305. The outer side of the positioning bolt 301 is also slidably connected to the pressure plate 302. The positioning bolt 3 01 and is located on the outside of the pressure plate 302 and the upper inclined wheel 304. A compression spring 303 is sleeved. The positioning bolt 301 passes through the end of the fixed plate 1 and is connected to a lock nut 307 by a thread. A nylon ring is embedded in the lock nut 307. The tension generated by the deformation of the nylon material is used to fix the bolt, mainly to prevent loosening caused by vibration. The outside of the positioning bolt 301 and is located between the lock nut 307 and the fixed plate 1 is slidably connected with an lock washer 306. The side of the lock washer 306 is provided with a beveled tooth surface, and the friction between the beveled tooth surface and the plane is used to prevent the fastener from loosening.

[0028] like Figure 1 As shown, one end of the fixing plate 1 is fixedly connected to a fixing column 5, and two reinforcing ribs 4 are fixedly connected between the side of the fixing column 5 and the fixing plate 1. By providing the reinforcing ribs 4, the bending resistance of the fixing plate 1 and the firmness of the fixing column 5 are increased, thereby extending the service life of the tensioner. The lower end of the fixing plate 1 is fixedly connected to a spare column 6, which serves as a spare fixing point of the fixing plate 1 to adapt to different vehicle models. Example

[0029] Working principle: First install the tensioner on the engine. In the first step, use the bolt to pass through the fixing column 5 to fix it to the engine. In the second step, use the fixing bolt 7 to pass through the fixing plate 1 and one end of the tensioning mechanism 2, and tighten the fixing nut 8. Synchronously use the fixing bolt 7 to fix the other end of the tensioning mechanism 2 to the engine. In the third step, put the pressure plate 302, the compression spring 303, the upper inclined wheel 304, and the lower inclined wheel 305 in sequence on the outside of the positioning bolt 301, then pass the other end of the positioning bolt 301 through the fixing plate 1, put the anti-loosening washer on the outside of the other end of the positioning bolt 301 and tighten the anti-loosening nut 307. When the tensioner is installed, the tensioner 2 pushes the fixed plate 1 to twist to one side, and the fixed plate 1 pushes the bevel wheel mechanism 3 to contact the belt of the automobile transmission system, thereby adjusting the tightness of the automobile transmission system belt. When the size of the automobile transmission system belt changes, the bevel wheel mechanism 3 is adjusted to adapt to automobile transmission system belts of different sizes. When the tensioner reaches a certain service life, the upper bevel wheel 304 and the lower bevel wheel 305 need to be replaced. Use a wrench to remove the lock nut 307 and pull out the positioning bolt 301. At this time, the upper bevel wheel 304 and the lower bevel wheel 305 can be replaced.

[0030] When the fixing plate 1 is twisted to one side by the tensioning mechanism 2, the return spring 210 releases the pressure to push the piston 207 to slide out of the cylinder 203. The piston 207 slides out of the cylinder 203 to form a negative pressure space between the piston 207 and the partition 211. When the pressure between the piston 207 and the partition 211 is reduced, the sealing ball 212 slides toward the limit plate 214. The sealing ball 212 slides toward the limit plate 214 to compress the limit spring 215. The hydraulic oil flows from between the cylinder 203 and the partition 211 to between the partition 211 and the piston 207. After the pressure in the cylinder 203 is balanced, the limit spring 215 releases the pressure to push the sealing ball 212 to slide toward the partition 211. The sealing ball 212 slides toward the limit plate 214. The partition 211 slides to close the circular hole on the partition 211, and the hydraulic oil between the cylinder body 203 and the partition 211 is reduced. The hydraulic oil in the fluid replenishing cylinder 206 flows into the space between the cylinder body 203 and the partition 211 through the connecting pipe 216. The one-way valve 9 filters the external air and sucks it into the fluid replenishing cylinder 206 to balance the internal pressure of the fluid replenishing cylinder 206. The piston 207 slides outward from the cylinder body 203 and pushes the cylinder rod 202 to slide to one side. At this time, the fixed plate 1 twists to one side, and the twisting of the fixed plate 1 pushes the inclined wheel mechanism 3 to contact the automobile transmission system belt. According to the principle of liquid incompressibility, the tensioning mechanism 2 provides stable support for the fixed plate 1, thereby ensuring the tightness of the belt in the automobile transmission system.

[0031] When the one-way valve 9 filters the external air and sucks it into the fluid replenishing cylinder 206, the pressure in the fluid replenishing cylinder 206 drops to less than the external air pressure, and the filter cover 901 filters the external air. The filtered air pushes the two valves 903 to rotate toward each other with the rotating shaft as the center. The two valves 903 rotate toward each other with the rotating shaft as the center, driving the two blocking blocks 904 to move toward each other. The two blocking blocks 904 move toward each other to block the spring 905. At this time, the filtered air enters the fluid replenishing cylinder 206 to balance the internal pressure of the fluid replenishing cylinder 206. When the internal pressure of the fluid replenishing cylinder 206 is balanced with the external pressure, the blocking spring 905 releases the pressure and pushes the two blocking blocks 904 to move in the opposite direction. The two blocking blocks 904 move in the opposite direction and push the two valves 903 to rotate in the opposite direction with the rotating shaft as the center. The two valves 903 rotate in the opposite direction with the rotating shaft as the center to close the fluid replenishing cylinder 206. At this time, the fluid replenishing cylinder 206 is isolated from the outside air, ensuring that a closed space is formed in the fluid replenishing cylinder 206.

[0032] When the size of the belt of the automobile transmission system changes, the bevel wheel mechanism 3 is adjusted to adapt to automobile transmission system belts of different sizes, and the upper bevel wheel 304 is slid outward. The upper bevel wheel 304 slides outward to squeeze the compression spring 303, and the belt is clamped between the upper bevel wheel 304 and the lower bevel wheel 305. The belt pushes the upper bevel wheel 304 and the lower bevel wheel 305 to move in opposite directions. The upper bevel wheel 304 and the lower bevel wheel 305 move in opposite directions to stretch the tension spring 308. At this time, the distance between the upper bevel wheel 304 and the lower bevel wheel 305 becomes wider, so that timing belts of different sizes can be used.

[0033] The above-described embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A new type of hydraulic inclined wheel tensioner, characterized in that: The invention comprises a fixing plate (1), a tensioning mechanism (2) is provided on one side of the fixing plate (1), a one-way valve (9) is provided on the upper side of the tensioning mechanism (2), a bevel wheel mechanism (3) is provided at the lower end of the fixing plate (1), one end of the fixing plate (1) is slidably connected to a fixing bolt (7), the fixing bolt (7) passes through the end of the fixing plate (1) and is connected to a fixing nut (8) by a thread, the tensioning mechanism (2) comprises a fixing seat (201), the fixing seat (201) is rotatably connected to the fixing bolt (7), and the side of the fixing seat (201) is fixedly connected to a cylinder. The piston (207) is fixedly connected to the piston rod (202), the other end of the cylinder rod (202) is fixedly connected to the piston (207), the arc-shaped outer side surface of the piston (207) is provided with a circular ring groove, and the circular ring groove is provided with a liquid-proof sealing ring (209), the outer side of the piston (207) is slidably connected to the cylinder body (203), the inner side surface of the end of the cylinder body (203) is provided with a circular ring groove, and the circular ring groove is provided with a dustproof sealing ring (208), the interior of the cylinder body (203) is fixedly connected to a partition (211), and a return spring (210) is fixedly connected between the partition (211) and the piston (207).

2. A novel hydraulic inclined wheel tensioner according to claim 1, characterized in that: The tensioning mechanism (2) further comprises four limiting columns (213), one end of each limiting column (213) being fixedly connected to the partition (211), and the other end of each limiting column (213) being fixedly connected to the limiting plate (214). A circular hole is provided on the side of the partition (211) near the limiting plate (214), a sealing ball (212) being slidably connected in the circular hole, and a limiting spring (215) being fixedly connected between the sealing ball (212) and the limiting plate (214).

3. A novel hydraulic inclined wheel tensioner according to claim 2, characterized in that: The tensioning mechanism (2) further comprises two connecting plates (205), the two connecting plates (205) being fixedly connected to the cylinder body (203), a fluid replenishing cylinder (206) being fixedly connected between the inner side surfaces of the upper ends of the two connecting plates (205), a connecting pipe (216) being fixedly connected to the side surface of the fluid replenishing cylinder (206), the other end of the connecting pipe (216) being connected to the cylinder body (203), and a connecting seat (204) being fixedly connected to the side surface of the other end of the cylinder body (203).

4. A novel hydraulic inclined wheel tensioner according to claim 3, characterized in that: The one-way valve (9) includes a valve body (902), the valve body (902) is fixedly connected to the fluid replenishing cylinder (206), the valve body (902) passes through the fluid replenishing cylinder (206) and is fixedly connected to a filter cover (901) at the end portion extending to the outside of the fluid replenishing cylinder (206), a square through hole is provided inside the valve body (902), two valves (903) are rotatably connected in the square through hole via a rotating shaft, a blocking block (904) is fixedly connected to the side of the valve (903), and blocking springs (905) are fixedly connected to the opposite sides of the two blocking blocks (904).

5. A novel hydraulic inclined wheel tensioner according to claim 4, characterized in that: The inclined wheel mechanism (3) includes a positioning bolt (301), the positioning bolt (301) is rotatably connected to the fixed plate (1), the outer side of the positioning bolt (301) is slidably connected to an upper inclined wheel (304) and a lower inclined wheel (305), an annular groove is formed on the opposite sides of the upper inclined wheel (304) and the lower inclined wheel (305), and a tension spring (308) is fixedly connected in the annular groove and located between the upper inclined wheel (304) and the lower inclined wheel (305), and the positioning bolt The outer side of (301) is also slidably connected to a pressure plate (302), a compression spring (303) is sleeved on the outer side of the positioning bolt (301) and located between the pressure plate (302) and the upper inclined wheel (304), the end of the positioning bolt (301) passes through the fixing plate (1) and is connected to a locking nut (307) by a thread, and a locking washer (306) is slidably connected to the outer side of the positioning bolt (301) and located between the locking nut (307) and the fixing plate (1).

6. A novel hydraulic inclined wheel tensioner according to claim 5, characterized in that: One end of the fixed plate (1) is fixedly connected to a fixed column (5), two reinforcing ribs (4) are fixedly connected between the side surface of the fixed column (5) and the fixed plate (1), and the lower end of the fixed plate (1) is fixedly connected to a spare column (6).

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