Belt tensioner for a vehicle

Abstract

The application provides a belt tensioning wheel for an automobile, which comprises a base, a track groove is opened in the center of the base, a resisting block and a push block are slidably arranged in the track groove, an electric cylinder is connected to the sidewall of the base, a gas rod of the electric cylinder is connected to the resisting block through the base, a damping spring is arranged between the push block and the resisting block to connect them, a tensioning wheel shaft connected to the push block is inserted into the track groove, a tensioning wheel body is sleeved on the sidewall of the tensioning wheel shaft, two fixing columns are arranged on the base near the tensioning wheel body, the two fixing columns are arranged on the two sides of the track groove and are located near the electric cylinder, a pressing wheel is sleeved on the sidewall of the fixing column, an adjusting device is arranged on the end of the pressing wheel away from the base, the belt tensioning force can be effectively adjusted in the case of an emergency, and the belt can be immediately reset when the running track of the belt deviates.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of automobile parts, in particular to a belt tensioner for automobile. BACKGROUND

[0002] The tensioner is a follow-up wheel pressed on the belt to change the wrap angle of the belt pulley or control the tension of the belt. It is a tensioning device of the belt drive. When the center distance of the belt cannot be adjusted, the tensioner can be used to tension the belt, so the tensioner is also called a steering unit.

[0003] The tensioner plays a decisive role in the stability of the belt drive. When the center distance of the belt pulley cannot be adjusted, the tensioner is usually used to tension the belt to achieve the predetermined tension of the belt, so as to ensure the normal operation of the wheel train.

[0004] At present, in order to ensure the operation of the wheel train under the predetermined tension, when the tension of the belt is small, the elastic element pushes the tensioner to move outward to increase the tension. If the engine suddenly slows down during operation, it will cause the belt to be too tight and cause wear between the belt and the side wall of the tensioner. When the tension of the belt is large, the belt pushes the tensioner to move inward to reduce the tension. If the engine suddenly accelerates during operation, it will cause the belt to be too loose and cause the belt to slip with the side wall of the tensioner. The tensioner of this structure uses an elastic element to automatically adjust the tension. The amount of tension adjustment cannot be accurately controlled.

[0005] On the other hand, since the width of the belt used in the automobile is different, the running track of the belt is easy to deviate during the process of increasing or decreasing the tension of the belt, which is easy to generate vibration pressure on the body of the tensioner, has poor stability effect, shortens the service life of the body of the tensioner, and reduces the working efficiency of the body of the tensioner. SUMMARY

[0006] In view of the above defects of the prior art, the present application provides a belt tensioner for automobile, which can effectively adjust the tension of the belt in case of emergency and ensure that the running track of the belt can be reset immediately after deviation, solving the problem that the amount of tension adjustment of the existing belt cannot be accurately controlled in case of emergency, and the running track of the belt is easy to deviate.

[0007] In order to achieve the above-mentioned purpose of effectively adjusting the tension of the belt in case of emergency and ensuring that the running track of the belt will not deviate, the present application provides the following technical scheme: a belt tensioner for automobile, comprising a base, the base is provided with a track groove at the center, a resisting block and a pushing block are slidably arranged in the track groove,

[0008] The base is connected with an electric cylinder along the side wall, the air rod of the electric cylinder is connected with the resisting block through the base, and a damping spring is arranged between the pushing block and the resisting block to connect them.

[0009] The track groove is provided with a tension wheel shaft connected with the push block, and a tension wheel body is sleeved on the side wall of the tension wheel shaft.

[0010] The base is provided with two fixing columns along the end close to the tension wheel body, which are distributed on both sides of the track groove and located close to the electric cylinder, and the side wall of the fixing column is sleeved with a pressing wheel.

[0011] The pressing wheel is provided with an adjusting device at the end away from the base.

[0012] Further, the adjusting device includes a bridge column with a U-shaped structure, first compression springs symmetrically connected at both ends of the bridge column, positioning columns inserted at the side walls of both ends of the bridge column, and a pulley sleeved on the positioning column.

[0013] Further, the two fixing columns and the bridge column are provided with positioning holes on the corresponding surfaces, and the bridge column is connected with the corresponding positioning hole through the first compression spring at both ends.

[0014] Further, the positioning hole is symmetrically provided with a sliding groove along the side wall, and the bridge column is provided with a sliding pin inserted in the sliding groove.

[0015] Further, the bridge column and the base are provided with two pads on the corresponding surfaces and the middle part of the bridge column, and the two pads are connected by a second compression spring.

[0016] Further, the positioning column is parallel to the bridge column, the pulley is located at the outer peripheral edge of the pressing wheel and is displaced according to the width of the belt, and the pressing wheel is provided with a limiting plate away from the pulley.

[0017] Further, the tension wheel body and the tension wheel body shaft are provided with two ball bearings, which are respectively located at both ends of the tension wheel body.

[0018] Further, the base is provided with a baffle for opening and closing the track groove at the end away from the tension wheel body along the edge of the track groove.

[0019] Further, the electric cylinder is provided with a flange plate, and the flange plate is provided with a stand for connecting the base at the four corners.

[0020] The beneficial effects of the present application are:

[0021] First, this invention addresses the problem that existing belt tension adjustment methods cannot accurately control the tension in the face of emergencies, and that belt running trajectory is prone to deviation. This automotive belt tensioner uses a combination of a damping spring and an electric cylinder to drive the electric cylinder, ensuring that the belt on the tensioner body maintains a constant tension. In the face of emergencies, the tensioner body has an elastic force under the buffer of the damping spring, enabling the belt to automatically adjust its tension. At the same time, the pressure roller not only significantly reduces the vibration of the entire belt in all operating stages, but also reduces the noise generated by the tensioner body during the loading process.

[0022] Furthermore, the automotive belt tensioner uses a combination of a first compression spring, a second compression spring, and a bridging column. Under the elastic force of the first and second compression springs, the pulley moves according to the width of the belt, ensuring that it can immediately reset after the belt's running trajectory deviates, thus improving the working efficiency of the tensioner body.

[0023] Furthermore, the automotive belt tensioner, with its baffle and flange, facilitates the replacement of damping springs and electric cylinders to suit the rated power of different engines, thus demonstrating promising application prospects and potential for widespread adoption. Attached Figure Description

[0024] Figure 1 This is a front view of the overall structure of the present invention;

[0025] Figure 2 Shown as a rear view of the overall structure of the present invention;

[0026] Figure 3 The diagram shows the connection structure between the base and the tension wheel body of the present invention.

[0027] Figure 4 This is shown as being in the present invention. Figure 3 A sectional view of the structure;

[0028] Figure 5 The diagram shows the connection structure of the base, adjustment device, fixing column, pressure roller, pad, and second compression spring of the present invention.

[0029] Figure 6 This is shown as being in the present invention. Figure 5 A sectional view of the structure;

[0030] Figure 7 This is shown as being in the present invention. Figure 6 Enlarged view of section A of the structure;

[0031] In the picture,

[0032] 1, base; 2, track groove; 3, push block; 4, abutting block; 5, electric cylinder; 6, damping spring; 7, tension pulley shaft; 8, tension pulley body; 9, fixed column; 10, compression wheel; 11, bridging column; 12, first compression spring; 13, positioning column; 14, pulley; 15, sliding groove; 16, bolt; 17, cushion block; 18, second compression spring; 19, limiting plate; 20, ball bearing; 21, baffle; 22, flange; 23, column; 24, positioning hole. DETAILED DESCRIPTION

[0033] In order to make the person skilled in the art better understand the technical solutions of the present application, and make the above-mentioned features, objects and advantages of the present application more clear and easy to understand, the present application will be further described below in conjunction with examples. The examples are only used to illustrate the present application and not to limit the scope of the present application.

[0034] As shown in Figures 1-7 It can be seen that the present application comprises: a base 1, the base 1 is provided with a track groove 2 at the center, the track groove 2 is provided with an abutting block 4 and a push block 3 slidingly arranged therein, and a baffle 21 is arranged on one side of the track groove 2 for opening and closing the track groove 2, which facilitates the installation and disassembly of the parts in the track groove 2.

[0035] The track groove 2 is provided with a tension pulley shaft 7 connected with the push block 3 at the side away from the baffle 21, and the tension pulley shaft 7 is provided with a tension pulley body 8 sleeved on the side wall; the tension pulley body 8 and the tension pulley shaft 7 are provided with ball bearings 20, and the ball bearings 20 are arranged at both ends of the tension pulley body 8 in a rolling manner to reduce the friction in the power transmission process and improve the transmission efficiency of mechanical power.

[0036] The base 1 is connected with an electric cylinder 5 along the side wall, the electric cylinder 5 is provided with a flange 22, the flange 22 is provided with a column 23 for connecting the base 1 at the four corners, which facilitates the replacement of the electric cylinder 5; the air rod of the electric cylinder 5 passes through the base 1 and is connected with the abutting block 4, so that the abutting block 4 can move back and forth along the vector direction of the track groove 2; the push block 3 and the abutting block 4 are provided with a damping spring 6 connected therebetween, which provides elastic force to the belt on the tension pulley body 8.

[0037] The base 1 is provided with a fixed column 9 near one end of the tension pulley body 8, the fixed column 9 is provided with two fixed columns 9 distributed on both sides of the track groove 2 and located near the electric cylinder 5, and the fixed column 9 is provided with a compression wheel 10 sleeved on the side wall, as Figure 1 The two fixed columns 9 can be distributed asymmetrically or symmetrically, which not only improves the tension of the belt, but also reduces the noise generated by the tension pulley body during loading.

[0038] An adjustment device is provided at the end of the pressure roller 10 away from the base 1. The adjustment device consists of a U-shaped bridging column 11, a first compression spring 12, a positioning column 13, and a pulley 14. The first compression spring 12 is symmetrically connected to both ends of the bridging column 11. Two positioning columns 13 are provided, which are respectively inserted into the side walls at both ends of the bridging column 11. The pulley 14 is sleeved on the positioning column 13. The two fixed columns 9 have positioning holes 24 on their corresponding surfaces to the bridging column 11. Both ends of the bridging column 11 are connected to the corresponding positioning holes 24 through the first compression spring 12, providing elasticity to the bridging column 11. Force is applied; the bridging column 11 and the base 1 have corresponding surfaces, and the middle section of the bridging column 11 is symmetrically provided with pads 17. There are two pads 17, which are connected by a second compression spring 18 to provide elastic force to the bridging column 11 and ensure that the bridging column 11 is subjected to uniform and constant force; the fixed column position 13 is set parallel to the bridging column 11, and the pulley 14 is located at the outer edge of the pressure roller 10 to increase the contact surface between the pressure roller 10 and the belt; and it moves with the width of the belt. The end of the pressure roller 10 away from the pulley 14 is provided with a limiting plate 19 to ensure that the belt can be reset immediately when it deviates.

[0039] The positioning hole 24 is symmetrically provided with a sliding groove 5 along the side wall, and the bridging post 11 is provided with a pin 16 that is slidably locked on the sliding groove 15, which plays a limiting role and prevents the positioning post 13 from colliding with the fixing post 9 or the bridging post 11 from falling off due to the first compression spring 12 or the second compression spring 18.

[0040] In use,

[0041] like Figure 1 As shown, the belt is wound around the automotive belt tensioner pulley, and the electric cylinder 5 is driven to keep the belt on the tensioner pulley body 8 at a constant tension.

[0042] In the event of an emergency, the tension wheel body 8 has an elastic force under the buffer of the damping spring 6, which enables the belt to automatically adjust the tension. Under the elastic force of the first compression spring 12 and the second compression spring 18, the pulley 14 is displaced according to the width of the belt, ensuring that the belt can be reset immediately after the running trajectory deviates.

[0043] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A belt tensioner for automobiles, characterized in that, Includes a base (1), the base (1) having a track groove (2) at its center, and a contact block (4) and a push block (3) slidingly disposed in the track groove (2). The base (1) is connected to an electric cylinder (5) along the side wall. The cylinder rod of the electric cylinder (5) is connected to the contact block (4) through the base (1). A damping spring (6) is provided between the push block (3) and the contact block (4) to connect them. The track groove (2) is connected to a tension wheel shaft (7) that is connected to the push block (3), and the tension wheel shaft (7) is fitted with a tension wheel body (8) on its side wall. The base (1) has a fixed column (9) at one end near the tension wheel body (8). There are two fixed columns (9), which are distributed on both sides of the track groove (2) and are located near the electric cylinder (5). The side wall of the fixed column (9) is fitted with a pressure wheel (10). An adjustment device is provided at the end of the pressure roller (10) away from the base (1); The adjustment device includes a U-shaped bridging column (11), a first compression spring (12) symmetrically connected to both ends of the bridging column (11), a positioning column (13) inserted into the side walls of both ends of the bridging column (11), and a pulley (14) sleeved on the positioning column (13).

2. The automotive belt tensioner according to claim 1, characterized in that: The two fixed posts (9) and the bridging post (11) are provided with positioning holes (24) on their corresponding surfaces. Both ends of the bridging post (11) are connected to the corresponding positioning holes (24) through a first compression spring (12).

3. The automotive belt tensioner according to claim 2, characterized in that: The positioning hole (24) is symmetrically provided with a sliding groove (15) along the side wall, and the bridging post (11) is provided with a pin (16) that is slidably locked on the sliding groove (15).

4. The automotive belt tensioner according to claim 2, characterized in that: The bridging column (11) and the base (1) have corresponding surfaces and symmetrical pads (17) in the middle section of the bridging column (11). There are two pads (17), and the two pads (17) are connected by a second compression spring (18).

5. The automotive belt tensioner according to claim 1, characterized in that: The positioning post (13) is arranged parallel to the bridging post (11). The pulley (14) is located at the outer edge of the pressure roller (10) and moves with the width of the belt. The end of the pressure roller (10) away from the pulley (14) is provided with a limiting plate (19).

6. The automotive belt tensioner according to claim 1, characterized in that: A ball bearing (20) is provided between the tension wheel body (8) and the tension wheel shaft (7). There are two ball bearings (20), which are located at both ends of the tension wheel body (8).

7. The automotive belt tensioner according to claim 1, characterized in that: The base (1) has a baffle (21) for opening and closing the track groove (2) at the end away from the tension wheel body (8) along the edge of the track groove (2).

8. The automotive belt tensioner according to claim 1, characterized in that: The electric cylinder (5) is fitted with a flange (22), and each of the four corners of the flange (22) is provided with a column (23) for connecting the base (1).

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