Tensioner assembly with large torque output

Abstract

The utility model discloses a tensioning wheel assembly with large torque output, comprising a fixed seat, a swing arm and a tensioning wheel, wherein the tensioning wheel is mounted on one end of the swing arm, and the other end of the swing arm is rotatably mounted on the fixed seat, wherein an axial groove is provided on the fixed seat, and a rotating shaft is mounted on the central axis position of the axial groove, wherein a rotating sleeve is provided on one end of the swing arm, and a sleeve is connected between the rotating sleeve and the rotating shaft, wherein two plane volute springs arranged up and down are installed in the axial groove, wherein the outer ends of the two plane volute springs are respectively provided with bent hook strips, wherein the fixed seat is provided with hook grooves matched with the hook strips, wherein the hook strips hook the hook grooves to match, wherein a vertically arranged hook groove is provided on the outer wall of the rotating sleeve, and the inner ends of the two plane volute springs are respectively hooked with the hook grooves on the outer wall of the rotating sleeve. The torque of the swing arm can be greatly improved, and the failure of the belt drive can be avoided when the high-power engine is output, and the structure is reliable and stable.

Description

Technical Field

[0001] The utility model relates to a transmission component on an engine, in particular to a tension wheel assembly with large torque output. Background Art

[0002] The tensioner is a tensioning device for belt transmission. When the center distance of the belt cannot be adjusted, the tensioner can be used to tension the belt. The tensioner is a follower wheel that presses on the belt to change the wrap angle of the pulley or control the tension of the belt. It is a tensioning device for belt transmission.

[0003] When using tensioners on some engines with larger displacement and higher power, the belt transmission needs to fully output the engine's torque, and needs to provide a larger tensioning force. However, a general tensioner only has one spring and can only provide 40N-50N of torque. When the engine outputs high power, the belt will slip due to insufficient torque, causing the engine transmission to fail. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a tensioning wheel assembly with large torque output of double springs, thereby greatly improving the torque and avoiding transmission failure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tensioning wheel assembly with large torque output, comprising a fixed seat, a swing arm and a tensioning wheel, the tensioning wheel is mounted on one end of the swing arm, and the other end of the swing arm is rotatably mounted on the fixed seat, the fixed seat is provided with an axial groove, a rotating shaft is installed at the central axis position of the axial groove, a rotating sleeve is provided at one end of the swing arm, a sleeve is connected between the rotating sleeve and the rotating shaft, two upper and lower planar volute springs are installed in the axial groove, the outer ends of the two planar volute springs are respectively provided with bent hook strips, the fixed seat is provided with a hook groove matching with the hook strip, the hook strip hooks the hook groove to match, a vertically arranged hook groove is provided on the outer wall of the rotating sleeve, and the inner ends of the two planar volute springs are respectively hooked with the hook grooves on the outer wall of the rotating sleeve.

[0006] A rotating ring matched with the open end of the shaft groove is arranged on the swing arm, a spacer ring is arranged between the rotating ring and the fixed seat, a limiting ring is arranged on the edge of the spacer ring, the outer wall of the rotating ring and the outer wall of the fixed seat are respectively provided with limiting grooves matched with the limiting rings, the upper part of the limiting ring is placed in the limiting groove of the outer wall of the fixed seat, and the lower part of the limiting ring is placed in the limiting groove on the outer wall of the rotating ring, the end face of the planar volute spring located at the lower position contacts with the spacer ring, an annular positioning ring groove is arranged at the upper position of the rotating shaft, a through hole is arranged at the bottom of the shaft groove to be sleeved with the positioning ring groove, a gasket is arranged at the upper end of the sleeve, the gasket abuts against the bottom of the shaft groove, and the planar volute spring located at the upper position abuts against the gasket.

[0007] A baffle is provided on the swing arm, and a convex ring protruding inward is provided at the opening below the rotating ring. A corrugated gasket, an outer gear ring, a sealing plate and a clamping ring are provided in sequence between the baffle and the convex ring. A "V"-shaped elastic snap-in portion is provided on the edge of the clamping ring, and the elastic snap-in portion is inserted from the outward outlet of the convex ring and clamped on the convex ring. The outer peripheral wall of the outer gear ring is provided with external teeth evenly distributed around the circumference, and an inner gear ring corresponding to the clamping teeth is provided on the inner wall of the rotating ring. The external teeth and the inner gear ring are inserted into each other in a concave and convex manner. An insertion groove matched with the sealing plate is provided at the lower end of the outer gear ring, and the sealing plate is placed in the insertion groove. The sealing plate abuts against the clamping ring under the elastic force of the corrugated gasket.

[0008] An arc-shaped limiting groove is arranged on the outer wall of the swing arm, and a limiting arm is convexly arranged on the outer wall of the fixing seat, and the limiting arm is placed in the arc-shaped limiting groove.

[0009] The beneficial effects of the utility model are as follows: a certain damping force can be provided by the two-plane volute spring and the concave-convex insertion of the outer gear ring and the inner gear ring, which can greatly improve the torsion of the swing arm and avoid the failure of the belt drive when the high-power engine is output, and the structure is reliable and stable.

[0010] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0012] Figure 2 A cross-sectional view of a specific embodiment of the utility model Figure 1 ;

[0013] Figure 3 for Figure 2 A magnified view of middle;

[0014] Figure 4 A cross-sectional view of a specific embodiment of the utility model Figure 1 ;

[0015] Figure 5 The three-dimensional structure of the swing arm in the specific implementation mode of the utility model Figure 1 ;

[0016] Figure 6 The three-dimensional structure of the swing arm in the specific implementation mode of the utility model Figure 2 ;. DETAILED DESCRIPTION

[0017] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0018] like Figure 1 — Figure 6 As shown, the present embodiment discloses a tensioning wheel assembly with large torque output, comprising a fixed seat 1, a swing arm 2 and a tensioning wheel 3, the tensioning wheel 3 is mounted on one end of the swing arm 2, and the other end of the swing arm 2 is rotatably mounted on the fixed seat 1, an axial groove 4 is provided on the fixed seat 1, a rotating shaft 5 is mounted at the central axis position of the axial groove 4, a rotating sleeve 21 is provided at one end of the swing arm 2, a sleeve 6 is connected between the rotating sleeve 21 and the rotating shaft 5, two planar volute springs 7 arranged up and down are installed in the axial groove 4, the outer ends of the two planar volute springs 7 are respectively provided with bent hook strips 71, a hook groove 10 cooperating with the hook strip 71 is provided on the fixed seat 1, the hook strip hooks the hook groove 10 to cooperate, a vertically arranged hook groove 10 is provided on the outer wall of the rotating sleeve 21, and the inner ends of the two planar volute springs 7 are respectively hooked with the hook groove 10 on the outer wall of the rotating sleeve 21.

[0019] The swing arm 2 is provided with a rotating ring 22 adapted to the open end of the shaft groove 4, a spacer ring 8 is provided between the rotating ring 22 and the fixed seat 1, a limit ring 81 is provided on the edge of the spacer ring 8, and the outer wall of the rotating ring 22 and the outer wall of the fixed seat 1 are respectively provided with a limit groove adapted to the limit ring 81, the upper part of the limit ring 81 is placed in the limit groove of the outer wall of the fixed seat 1, and the lower part of the limit ring 81 is placed in the limit groove on the outer wall of the rotating ring 22, so that the fixed seat and the swing arm can be more stable when rotating relative to each other, the end face of the plane volute spring 7 located at the lower position contacts the spacer ring 8, an annular positioning ring groove 51 is provided at the upper position of the rotating shaft 5, a perforation is provided at the bottom of the shaft groove 4 to be sleeved and matched with the positioning ring groove 51, a washer is provided at the upper end of the sleeve, the washer abuts against the bottom of the shaft groove, and the plane volute spring located at the upper position abuts against the washer. Through this structure, the positioning of the two plane volute springs 7 can be made more reliable and stable.

[0020] A baffle 23 is provided on the swing arm 2, and a convex ring 221 protruding inward is provided at the opening below the rotating ring 22. A corrugated gasket 20, an outer gear ring 30, a sealing plate 40 and a clamping ring 50 are arranged in sequence between the baffle 23 and the convex ring 221. A "V"-shaped elastic snap-in portion 501 is provided on the edge of the clamping ring 50. The elastic snap-in portion 501 penetrates from the outward outlet of the convex ring 221 and is clamped on the convex ring 221. The outer peripheral wall of the outer gear ring 30 is provided with external teeth evenly distributed around the circumference, and an inner gear ring 222 corresponding to the clamping teeth is provided on the inner wall of the rotating ring 22. The outer teeth and the inner gear ring 222 are inserted into each other in a concave and convex manner. An insertion groove matched with the sealing plate 40 is provided at the lower end of the outer gear ring 30, and the sealing plate 40 is placed in the insertion groove. The sealing plate 40 abuts against the clamping ring 50 under the elastic force of the corrugated gasket 20. The structure can improve the damping force of the swing arm 2 rotation, reduce the random shaking of the swing arm 2, and make the belt transmission more stable.

[0021] An arc-shaped limiting groove 25 is provided on the outer wall of the swing arm 2, and a limiting arm 11 is convexly provided on the outer wall of the fixing seat 1, and the limiting arm 11 is placed in the arc-shaped limiting groove 25. Through this structure, the rotation of the swing arm 2 can be limited by the limiting arm 11, preventing its rotation angle from being too large, thereby improving the reliability of the structure.

[0022] By adopting the above technical solution, a certain damping force can be provided by the two-plane spiral spring 7 and the concave-convex insertion of the outer gear ring 30 and the inner gear ring 222, which can greatly improve the torque of the swing arm 2 and avoid the failure of the belt drive when the high-power engine is output. In addition, the structure is reliable and stable.

[0023] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tension wheel assembly with large torque output, comprising a fixed seat, a swing arm and a tension wheel, wherein the tension wheel is mounted on one end of the swing arm, and the other end of the swing arm is rotatably mounted on the fixed seat, characterized in that: The fixed seat is provided with an axis groove, a rotating shaft is installed at the central axis position of the axis groove, a rotating sleeve is provided at one end of the swing arm, a sleeve is connected between the rotating sleeve and the rotating shaft, two upper and lower planar volute springs are installed in the axis groove, the outer ends of the two planar volute springs are respectively provided with bent hook strips, a hook groove matching with the hook strip is provided on the fixed seat, the hook strip hooks the hook groove to match, a vertically arranged hook groove is provided on the outer wall of the rotating sleeve, and the inner ends of the two planar volute springs are respectively hooked with the hook grooves on the outer wall of the rotating sleeve.

2. The tension wheel assembly with large torque output according to claim 1, characterized in that: A rotating ring matched with the open end of the shaft groove is arranged on the swing arm, a spacer ring is arranged between the rotating ring and the fixed seat, a limiting ring is arranged on the edge of the spacer ring, the outer wall of the rotating ring and the outer wall of the fixed seat are respectively provided with limiting grooves matched with the limiting rings, the upper part of the limiting ring is placed in the limiting groove of the outer wall of the fixed seat, and the lower part of the limiting ring is placed in the limiting groove on the outer wall of the rotating ring, the end face of the planar volute spring located at the lower position contacts with the spacer ring, an annular positioning ring groove is arranged at the upper position of the rotating shaft, a through hole is arranged at the bottom of the shaft groove to be sleeved with the positioning ring groove, a gasket is arranged at the upper end of the sleeve, the gasket abuts against the bottom of the shaft groove, and the planar volute spring located at the upper position abuts against the gasket.

3. The tension wheel assembly with large torque output according to claim 2, characterized in that: A baffle is provided on the swing arm, and a convex ring protruding inward is provided at the opening below the rotating ring. A corrugated gasket, an outer gear ring, a sealing plate and a clamping ring are sequentially provided between the baffle and the convex ring. A "V"-shaped elastic snap-in portion is provided on the edge of the clamping ring. The elastic snap-in portion is inserted from the outward outlet of the convex ring and is clamped on the convex ring. The outer peripheral wall of the outer gear ring is provided with external teeth evenly distributed around the circumference, and an inner gear ring corresponding to the clamping teeth is provided on the inner wall of the rotating ring. The external teeth and the inner gear ring are inserted into each other in a concave and convex manner. An insertion groove matched with the sealing plate is provided at the lower end of the outer gear ring, and the sealing plate is placed in the insertion groove. The sealing plate abuts against the clamping ring under the elastic force of the corrugated gasket.

4. The tension wheel assembly with large torque output according to claim 1, characterized in that: An arc-shaped limiting groove is arranged on the outer wall of the swing arm, and a limiting arm is convexly arranged on the outer wall of the fixing seat, and the limiting arm is placed in the arc-shaped limiting groove.

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