Hydraulic chain tensioner for an electric vehicle engine

Abstract

The present application relates to chain tensioner technical field, especially to a kind of hydraulic chain tensioner for electric automobile engine, including fixed seat, hydraulic seat is slidably fitted on fixed seat, tensioning sprocket is rotatably connected on hydraulic seat, oil tank is fixedly connected on the side of fixed seat, oil extraction seat is fixedly connected on oil tank, transmission mechanism is rotatably connected on oil extraction seat, oil liquid processing seat is fixedly connected on oil tank, automatic decontamination mechanism is rotatably connected in oil liquid processing seat, arc filter screen is fixedly connected in oil liquid processing seat, by setting automatic decontamination mechanism on arc filter screen, the effective working time of arc filter screen can be extended in the use process of hydraulic chain tensioner, prevent arc filter screen from being blocked due to impurity accumulation, ensure the fluency of oil, not only can effectively improve the stability, reliability and maintenance efficiency of system, also can prevent pressure fluctuation or tensioner jam caused by arc filter screen blockage.

Description

Technical Field

[0001] This invention relates to the field of chain tensioner technology, and more particularly to a hydraulic chain tensioner for electric vehicle engines. Background Technology

[0002] Hydraulic chain tensioners used in electric vehicle engines are similar to those in traditional internal combustion engine engines. Their main function is to maintain proper chain tension through a hydraulic system to reduce chain wear, vibration, and noise, thereby ensuring smooth engine operation.

[0003] The prior art publication number CN103671773A provides a hydraulic tensioner for engine timing chain. By adding a metal filter to the oil reservoir of the tensioner, the filter's filtration function intercepts impurities larger than a certain diameter outside the tensioner, ensuring that the diameter of impurities in the oil entering the tensioner is smaller than the gap between the tensioner plunger and the tensioner housing, thus preventing the tensioner from jamming and failing.

[0004] In existing technology, impurities in hydraulic oil are filtered through metal screens during use. However, existing technology is not convenient for processing the impurities on the metal screens. As a result, after the metal screens have been intercepting impurities for a long time, the mesh is easily clogged due to the accumulation of sludge and other substances. The oil flow efficiency of the screen will drop rapidly, which will lead to a delay in the oil supply to the tensioner and affect the dynamic tensioning response speed.

[0005] In summary, the existing technology lacks a technique for automatic maintenance of the filter screen inside the hydraulic tensioner. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing a hydraulic chain tensioner for electric vehicle engines.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a hydraulic chain tensioner for an electric vehicle engine, comprising a fixed base, a hydraulic base slidably fitted on the fixed base, a tensioning sprocket rotatably connected to the hydraulic base, an oil tank fixedly connected to one side of the fixed base, an oil extraction seat fixedly connected to the oil tank, a transmission mechanism rotatably connected to the oil extraction seat, an oil treatment seat fixedly connected to the oil tank, an automatic decontamination mechanism rotatably connected inside the oil treatment seat, and an arc-shaped filter screen fixedly connected inside the oil treatment seat.

[0008] Preferably, the inner wall of the fixed seat has two piston chambers with a symmetrical structure, and a hydraulic pump is fixedly connected to the fixed seat. The output end of the hydraulic pump is connected to the inner wall of the piston chamber, and the input end of the hydraulic pump is connected to the inner wall of the oil tank.

[0009] Preferably, two piston rods are fixedly connected to the lower side of the hydraulic seat, and the piston rods are slidably engaged with the inner wall of the piston chamber.

[0010] Preferably, a worm gear is fixedly connected to one end of the tensioning sprocket, a worm wheel is engaged with one side of the worm gear, the worm wheel is rotatably connected to the hydraulic base, and a transmission wheel A is fixedly connected to the lower side of the worm wheel.

[0011] Preferably, an oil extraction pipe is fixedly connected to one side of the bottom end of the oil extraction base, and the other end of the oil extraction pipe extends through the outer wall of the oil tank to the inner wall of the bottom end of the oil tank. An oil discharge pipe is fixedly connected to one side of the oil extraction base, and the other end of the oil discharge pipe is fixedly connected to the inner wall of the oil treatment base. An impeller is rotatably connected to the inner wall of the oil extraction base.

[0012] Preferably, the transmission mechanism includes an electric actuator, which is rotatably connected to the oil tank. The bottom end of the electric actuator is fixedly connected to the impeller. A drive wheel is fixedly connected near the bottom end of the electric actuator. A transmission wheel B is fixedly connected to the top end of the electric actuator. The transmission wheel B meshes with the transmission wheel A for transmission.

[0013] Preferably, an oil return pipe is fixedly connected to the inner wall of the bottom end of the oil treatment seat, and the other end of the oil return pipe is fixedly connected to the oil tank. Both sides of the oil treatment seat are provided with a material receiving groove that slides together, and one end of the material receiving groove is fixedly connected to the oil treatment seat by bolts.

[0014] Preferably, the automatic decontamination mechanism includes a reciprocating lead screw, which is rotatably connected to the inner wall of the oil treatment seat. A driven wheel is fixedly connected to the outer end of the reciprocating lead screw, and the driven wheel is meshed with the driving wheel for transmission. A sliding plate is slidably fitted on the outer wall of the reciprocating lead screw, and a cleaning plate is slidably fitted on the inner wall of the bottom end of the sliding plate. The bottom end of the cleaning plate is in slidable contact with the arc-shaped filter screen. Multiple springs are fixedly connected to the top end of the cleaning plate, and the other end of each spring is fixedly connected to the inner wall of the sliding plate. Transmission racks are fixedly connected to both sides of one end of the sliding plate.

[0015] Preferably, brush rods are rotatably connected to both ends of the arc-shaped filter screen. The brush rods are slidably in contact with the bottom end of the cleaning plate. A gear A is fixedly connected to one end of the brush rod. An adjusting wheel is meshed with one side of the gear A. A rotating shaft is fixedly connected to the adjusting wheel. The rotating shaft is rotatably connected to the arc-shaped filter screen. A gear B is fixedly connected to one end of the rotating shaft. The gear B meshes with a transmission rack.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By setting an automatic cleaning mechanism on the arc-shaped filter screen, when the hydraulic oil is filtered for impurities using the arc-shaped filter screen, the reciprocating cleaning plate can push the impurities on the arc-shaped filter screen into the receiving trough. At the same time, the moving automatic cleaning mechanism can drive the brush rod to rotate and brush off the impurities attached to the cleaning plate. During the use of the hydraulic chain tensioner, the effective working time of the arc-shaped filter screen can be extended, preventing the arc-shaped filter screen from being blocked due to the accumulation of impurities, ensuring the smooth flow of oil. This not only effectively improves the stability, reliability and maintenance efficiency of the system, but also prevents pressure fluctuations or tensioner jamming caused by the blockage of the arc-shaped filter screen. By setting up a transmission mechanism, while the engine chain drives the tension sprocket to rotate, the automatic cleaning mechanism can be driven through the transmission mechanism to clean the arc-shaped filter screen. This allows the cleaning process to be synchronized with the engine operation without manual intervention, ensuring that the filter screen is always in the best working condition. This not only improves the cleaning efficiency of the hydraulic chain tensioner, but also optimizes the stability, reliability and operating efficiency of the hydraulic system. By setting up an oil extraction seat, the transmission mechanism drives the automatic cleaning mechanism, which in turn drives the impeller to rotate, drawing out the hydraulic oil from the tank and filtering it through an arc-shaped filter screen. Through the linkage design between the oil extraction seat and the transmission mechanism, the efficiency, reliability, and safety of the hydraulic system can be improved while ensuring the cleanliness of the hydraulic oil. This not only improves the automation level of the system but also optimizes the maintenance process and reduces failure and operating costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a hydraulic chain tensioner for an electric vehicle engine according to the present invention; Figure 2 This is a partial cross-sectional schematic diagram of the overall structure of a hydraulic chain tensioner for an electric vehicle engine according to the present invention; Figure 3 This is a partial sectional view of the structure of the fixing seat and hydraulic seat of a hydraulic chain tensioner for an electric vehicle engine according to the present invention. Figure 4 This is a schematic diagram of the tensioning sprocket structure of a hydraulic chain tensioner for an electric vehicle engine according to the present invention; Figure 5 This is a partial cross-sectional schematic diagram of the oil tank and oil sucker seat of a hydraulic chain tensioner for an electric vehicle engine according to the present invention. Figure 6 This is a schematic diagram of the transmission mechanism of a hydraulic chain tensioner for an electric vehicle engine according to the present invention; Figure 7 This is a partial cross-sectional view of the structure of the oil treatment seat and other components of a hydraulic chain tensioner for an electric vehicle engine according to the present invention. Figure 8This is a partial cross-sectional schematic diagram of the automatic cleaning mechanism structure of a hydraulic chain tensioner for an electric vehicle engine according to the present invention; Figure 9 This is a schematic diagram of an arc-shaped filter screen structure for a hydraulic chain tensioner used in an electric vehicle engine according to the present invention.

[0018] The diagram shows: 1. Fixed base; 2. Hydraulic base; 3. Tensioning sprocket; 4. Oil tank; 5. Oil extraction base; 6. Transmission mechanism; 7. Oil treatment base; 8. Automatic cleaning mechanism; 9. Arc-shaped filter screen; 101. Piston chamber; 102. Hydraulic pump; 201. Piston rod; 301. Worm gear; 302. Worm wheel; 303. Transmission wheel A; 501. Oil extraction pipe; 502. Oil discharge pipe; 503. Impeller. ; 601, Electric actuator; 602, Drive wheel; 603, Transmission wheel B; 701, Oil return pipe; 702, Material receiving trough; 703, Bolt; 801, Reciprocating lead screw; 802, Driven wheel; 803, Sliding plate; 804, Cleaning plate; 805, Spring; 806, Transmission rack; 901, Brush rod; 902, Gear A; 903, Adjusting wheel; 904, Rotating shaft; 905, Gear B. Detailed Implementation

[0019] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] like Figure 1 - Figure 9 The hydraulic chain tensioner for an electric vehicle engine shown includes a fixed base 1, a hydraulic base 2 slidably mounted on the fixed base 1, a tensioning sprocket 3 rotatably connected to the hydraulic base 2, an oil tank 4 fixedly connected to one side of the fixed base 1, an oil extraction seat 5 fixedly connected to the oil tank 4, a transmission mechanism 6 rotatably connected to the oil extraction seat 5, an oil treatment seat 7 fixedly connected to the oil tank 4, an automatic decontamination mechanism 8 rotatably connected inside the oil treatment seat 7, and an arc-shaped filter screen 9 fixedly connected inside the oil treatment seat 7. The inner wall of the bottom end of the oil tank 4 has a conical structure, which facilitates the concentrated sedimentation of impurities.

[0021] like Figure 3 As shown, the inner wall of the fixed base 1 has two piston chambers 101 with a symmetrical structure. A hydraulic pump 102 is fixedly connected to the fixed base 1. The output end of the hydraulic pump 102 is connected to the inner wall of the piston chamber 101, and the input end of the hydraulic pump 102 is connected to the inner wall of the oil tank 4.

[0022] like Figure 3 As shown, two piston rods 201 are fixedly connected to the lower side of the hydraulic base 2, and the piston rods 201 are slidably engaged with the inner wall of the piston chamber 101.

[0023] like Figure 4 As shown, a worm gear 301 is fixedly connected to one end of the tension sprocket 3. A worm wheel 302 is meshed with one side of the worm gear 301, and the worm wheel 302 is rotatably connected to the hydraulic base 2. A transmission wheel A303 is fixedly connected to the lower side of the worm wheel 302. The electric actuator 601 drives the connected transmission wheel B603 to move, causing the transmission wheel B603 to mesh with the transmission wheel A303. At this time, the engine chain will drive the tension sprocket 3 to rotate, and the tension sprocket 3 will drive the connected worm gear 301 to rotate.

[0024] like Figure 5 As shown, an oil extraction pipe 501 is fixedly connected to one side of the bottom of the oil extraction base 5. The other end of the oil extraction pipe 501 extends through the outer wall of the oil tank 4 to the inner wall of the bottom of the oil tank 4. An oil discharge pipe 502 is fixedly connected to one side of the oil extraction base 5. The other end of the oil discharge pipe 502 is fixedly connected to the inner wall of the oil treatment base 7. An impeller 503 is rotatably connected to the inner wall of the oil extraction base 5. The worm gear 301 can drive the transmission wheel A303 connected to the worm gear 302 to rotate. At this time, the transmission wheel A303 will drive the electric actuator 601 connected to the transmission wheel B603 to rotate, so that the electric actuator 601 can drive the connected impeller 503 to rotate.

[0025] like Figure 6 As shown, the transmission mechanism 6 includes an electric actuator 601, which is rotatably connected to the oil tank 4. The bottom end of the electric actuator 601 is fixedly connected to the impeller 503. A drive wheel 602 is fixedly connected near the bottom end of the electric actuator 601, and a transmission wheel B603 is fixedly connected to the top end of the electric actuator 601. The transmission wheel B603 meshes with the transmission wheel A303 for transmission. When the electric actuator 601 rotates, it drives the connected drive wheel 602 to rotate, so that the drive wheel 602 can drive the reciprocating screw 801 connected to the driven wheel 802 to rotate.

[0026] like Figure 7 As shown, a return oil pipe 701 is fixedly connected through the inner wall of the bottom end of the oil treatment base 7. The other end of the return oil pipe 701 is fixedly connected through the oil tank 4. Material receiving grooves 702 are slidably fitted on both sides of the oil treatment base 7. One end of the material receiving groove 702 is fixedly connected to the oil treatment base 7 by bolts 703. The bolts 703 facilitate the disassembly and cleaning of the material receiving groove 702.

[0027] like Figure 8As shown, the automatic decontamination mechanism 8 includes a reciprocating screw 801, which is rotatably connected to the inner wall of the oil treatment seat 7. A driven wheel 802 is fixedly connected to the outer end of the reciprocating screw 801, and the driven wheel 802 meshes with the driving wheel 602 for transmission. A sliding plate 803 is slidably fitted on the outer wall of the reciprocating screw 801, and a cleaning plate 804 is slidably fitted on the inner wall of the bottom end of the sliding plate 803. The bottom end of the cleaning plate 804 is in slidable contact with the arc-shaped filter screen 9. Multiple springs 805 are fixedly connected to the top end of the cleaning plate 804, and the other end of the springs 805 is fixedly connected to the inner wall of the sliding plate 803. A transmission rack 806 is fixedly connected to both sides of one end of the sliding plate 803. The reciprocating screw 801 drives the sliding plate 803 to move back and forth. At this time, under the action of the springs 805, the cleaning plate 804 pushes the filter material in the arc-shaped filter screen 9 into the receiving trough 702.

[0028] By setting an automatic cleaning mechanism 8 on the arc-shaped filter screen 9, when the hydraulic oil is filtered for impurities using the arc-shaped filter screen 9, the reciprocating cleaning plate 804 can push the impurities on the arc-shaped filter screen 9 into the receiving trough 702. At the same time, the moving automatic cleaning mechanism 8 can drive the brush rod 901 to rotate, brushing off the impurities attached to the cleaning plate 804. During the use of the hydraulic chain tensioner, the effective working time of the arc-shaped filter screen 9 can be extended, preventing the arc-shaped filter screen 9 from being blocked due to the accumulation of impurities, ensuring the smooth flow of oil. This not only effectively improves the stability, reliability and maintenance efficiency of the system, but also prevents pressure fluctuations or tensioner jamming caused by the blockage of the arc-shaped filter screen 9.

[0029] like Figure 9 As shown, brush rods 901 are rotatably connected to both ends of the arc-shaped filter screen 9. The brush rods 901 are in sliding contact with the bottom end of the cleaning plate 804. A gear A902 is fixedly connected to one end of the brush rod 901. An adjusting wheel 903 is meshed with one side of the gear A902. A rotating shaft 904 is fixedly connected to the adjusting wheel 903. The rotating shaft 904 is rotatably connected to the arc-shaped filter screen 9. A gear B905 is fixedly connected to one end of the rotating shaft 904. The gear B905 meshes with a transmission rack 806. When the sliding plate 803 approaches the receiving trough 702, it drives the gear B905 to rotate through the connected transmission rack 806. This causes the gear B905 to drive the adjusting wheel 903 connected to the rotating shaft 904 to rotate. At this time, the adjusting wheel 903 drives the meshing gear A902 to rotate, so that the gear A902 can drive the connected brush rod 901 to rotate.

[0030] Working principle: During the use of the electric vehicle engine, the hydraulic oil in the oil tank 4 is drawn into the piston chamber 101 by the hydraulic pump 102, thereby adjusting the extension length of the piston rod 201 and thus adjusting the tension of the chain by the tension sprocket 3. When the hydraulic oil in the oil tank 4 needs to be filtered, the electric actuator 601 first drives the connected transmission wheel B603 to move, so that the transmission wheel B603 meshes with the transmission wheel A303. At this time, the engine chain will drive the tension sprocket 3 to rotate. The tension sprocket 3 will drive the connected worm 301 to rotate, so that the worm 301 can drive the transmission wheel A303 connected to the worm wheel 302 to rotate. At this time, the transmission wheel A303 will drive the electric actuator 601 connected to the transmission wheel B603 to rotate, so that the electric actuator 601 can drive the connected impeller 503 to rotate. Thus, the hydraulic oil in the oil tank 4 is drawn into the oil sucker seat 5 through the oil sucker pipe 501, and injected into the arc-shaped filter screen 9 through the oil drain pipe 502 for filtration. When the electric push rod 601 rotates, it will drive the connected drive wheel 602 to rotate, so that the drive wheel 602 can drive the reciprocating screw 801 connected to the driven wheel 802 to rotate. At this time, the reciprocating screw 801 will drive the sliding plate 803 to move back and forth. At this time, under the action of the spring 805, the cleaning plate 804 pushes the filter material in the arc-shaped filter screen 9 into the receiving trough 702. When the sliding plate 803 approaches the receiving trough 702, it will drive the gear B905 to rotate through the connected transmission rack 806, so that the gear B905 drives the adjusting wheel 903 connected to the rotating shaft 904 to rotate. At this time, the adjusting wheel 903 will drive the meshing gear A902 to rotate, so that the gear A902 can drive the connected brush rod 901 to rotate, brushing off the impurities attached to the cleaning plate 804.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A hydraulic chain tensioner for an electric vehicle engine, comprising a mounting base (1), characterized in that: A hydraulic seat (2) is slidably fitted on the fixed base (1), and a tensioning sprocket (3) is rotatably connected to the hydraulic seat (2). An oil tank (4) is fixedly connected to one side of the fixed base (1), and an oil extraction seat (5) is fixedly connected to the oil tank (4). A transmission mechanism (6) is rotatably connected to the oil extraction seat (5). An oil treatment seat (7) is fixedly connected to the oil tank (4), and an automatic decontamination mechanism is rotatably connected inside the oil treatment seat (7). (8) An arc-shaped filter screen (9) is fixedly connected inside the oil treatment seat (7). A worm gear (301) is fixedly connected to one end of the tension sprocket (3). A worm wheel (302) is meshed and driven on one side of the worm gear (301). The worm wheel (302) is rotatably connected to the hydraulic seat (2). A transmission wheel A (303) is fixedly connected to the lower side of the worm wheel (302). The transmission mechanism (6) includes an electric actuator (601). The electric actuator (601) and The oil tank (4) is rotatably connected. A drive wheel (602) is fixedly connected to the electric push rod (601) near its bottom end. The automatic cleaning mechanism (8) includes a reciprocating screw (801). The reciprocating screw (801) is rotatably connected to the inner wall of the oil treatment seat (7). A driven wheel (802) is fixedly connected to the outer end of the reciprocating screw (801). The driven wheel (802) meshes with the drive wheel (602) for transmission. The reciprocating screw (801) has a drive wheel (602) at its outer end. A sliding plate (803) is provided in sliding fit with the wall. A cleaning plate (804) is provided in sliding fit with the inner wall of the bottom end of the sliding plate (803). The bottom end of the cleaning plate (804) is in sliding contact with the arc-shaped filter screen (9). A plurality of springs (805) are fixedly connected to the top end of the cleaning plate (804). The other end of the springs (805) is fixedly connected to the inner wall of the sliding plate (803). A transmission rack (806) is fixedly connected to both sides of one end of the sliding plate (803).

2. A hydraulic chain tensioner for an electric vehicle engine according to claim 1, characterized in that: The inner wall of the fixed seat (1) has two piston chambers (101) with a symmetrical structure. A hydraulic pump (102) is fixedly connected to the fixed seat (1). The output end of the hydraulic pump (102) is connected to the inner wall of the piston chamber (101), and the input end of the hydraulic pump (102) is connected to the inner wall of the oil tank (4).

3. A hydraulic chain tensioner for an electric vehicle engine according to claim 2, characterized in that: Two piston rods (201) are fixedly connected to the lower side of the hydraulic base (2), and the piston rods (201) are slidably engaged with the inner wall of the piston chamber (101).

4. A hydraulic chain tensioner for an electric vehicle engine according to claim 1, characterized in that: An oil extraction pipe (501) is fixedly connected to one side of the bottom of the oil extraction seat (5). The other end of the oil extraction pipe (501) extends through the outer wall of the oil tank (4) to the inner wall of the bottom of the oil tank (4). An oil discharge pipe (502) is fixedly connected to one side of the oil extraction seat (5). The other end of the oil discharge pipe (502) is fixedly connected to the inner wall of the oil treatment seat (7). An impeller (503) is rotatably connected to the inner wall of the oil extraction seat (5).

5. A hydraulic chain tensioner for an electric vehicle engine according to claim 4, characterized in that: The bottom end of the electric actuator (601) is fixedly connected to the impeller (503), and the top end of the electric actuator (601) is fixedly connected to the transmission wheel B (603), which meshes with the transmission wheel A (303) for transmission.

6. A hydraulic chain tensioner for an electric vehicle engine according to claim 1, characterized in that: The bottom inner wall of the oil treatment seat (7) is fixedly connected with an oil return pipe (701), and the other end of the oil return pipe (701) is fixedly connected to the oil tank (4). Both sides of the oil treatment seat (7) are provided with a material receiving groove (702) that slides together. One end of the material receiving groove (702) is fixedly connected to the oil treatment seat (7) by a bolt (703).

7. A hydraulic chain tensioner for an electric vehicle engine according to claim 1, characterized in that: Both ends of the arc-shaped filter screen (9) are rotatably connected to brush rods (901). The brush rods (901) are slidably contacted with the bottom end of the cleaning plate (804). One end of the brush rod (901) is fixedly connected to a gear A (902). One side of the gear A (902) is meshed with an adjusting wheel (903). The adjusting wheel (903) is fixedly connected to a rotating shaft (904). The rotating shaft (904) is rotatably connected to the arc-shaped filter screen (9). One end of the rotating shaft (904) is fixedly connected to a gear B (905). The gear B (905) is meshed with a transmission rack (806).

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