Double-damped tensioner

Abstract

This utility model discloses a double-damped tensioning pulley, belonging to the technical field of mechanical transmission components. It includes a mounting cover, a swing arm, and a pulley. A torsion spring is disposed between the mounting cover and the swing arm. The pulley is mounted on one end of the swing arm via a bearing, and the other end of the swing arm is connected to the mounting cover via a bolt assembly. A mounting ring is provided on the central shaft of the mounting cover, and a cap is provided on the swing arm; the two are connected to the bolt assembly via a positioning bushing. A limiting ring and a torsion spring groove are provided inside the cap, and the torsion spring is installed therein. An upper damping ring and a lower damping ring are fitted on the outer wall of the mounting ring, and the two are respectively pressed by corresponding upper and lower clamping rings. The clamping rings rotate with the cap and generate frictional damping with the damping rings. This utility model, through its double-damping structure, effectively suppresses swing arm vibration under impact loads, prevents belt slippage, and improves transmission stability, making it suitable for high-load conditions such as those in engineering vehicles.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission components, and in particular to a double-damping tension wheel structure for engineering vehicles. Background Technology

[0002] Traditional tensioners typically consist of a mounting cover, a swing arm, a pulley, and a torsion spring. The swing arm is bolted to the mounting cover, and the pulley is mounted to one end of the swing arm via a bearing. Due to the complex operating environment of engineering vehicles, instantaneous impact forces often occur during transmission, causing the tensioner to vibrate significantly. This can easily lead to the drive belt slipping off, resulting in transmission failure and affecting the stability and safety of power output.

[0003] In the prior art, some tensioning wheels have a single damping structure between the swing arm and the mounting cover, but the damping force is insufficient and cannot effectively suppress large-amplitude vibrations; in addition, the damping component is fixed in the installation position and is difficult to move synchronously with the swing arm, resulting in unstable damping effect and easy wear and failure.

[0004] Therefore, there is an urgent need for a tensioner structure that can maintain stable damping and reduce vibration under impact loads. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a double-damped tensioning wheel to solve the problems of insufficient damping, large vibration amplitude, and unstable transmission in existing technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-damping tensioning wheel, comprising a mounting cover, a swing arm, and a pulley, wherein a torsion spring is disposed between the mounting cover and the swing arm, the pulley is rotatably mounted on one end of the swing arm, and the other end of the swing arm is rotatably connected to the mounting cover via a bolt assembly; characterized in that the mounting cover is provided with a mounting ring, the swing arm is provided with a cap corresponding to the mounting ring, and a positioning liner is provided between the mounting ring and the cap; a torsion spring groove is provided inside the cap, and the torsion spring is installed in the torsion spring groove; at least two damping rings are sleeved on the mounting ring, and a clamping ring is sleeved on the outside of each damping ring, the clamping ring rotating synchronously with the cap and frictionally engaging with the corresponding damping ring to provide a damping effect when the swing arm swings.

[0007] The present invention is further configured such that the damping ring is an open ring structure and is made of an elastic wear-resistant material.

[0008] The present invention is further configured such that: the tightening ring is an open ring with hooks at both ends of the opening; a limiting ring is provided on the cap; the limiting ring has a groove that cooperates with the hooks; and the tightening ring rotates synchronously with the cap by hooking the hooks with the grooves.

[0009] The present invention is further configured such that: a first annular groove is formed between the outer wall of the mounting ring and the inner wall of the mounting cover, and a damping ring is sleeved on the mounting ring and located in the first annular groove.

[0010] The present invention is further configured such that: the outer wall of the positioning liner is provided with a positioning ring, which is engaged in the gap between the convex ring and the mounting ring of the cap to limit axial displacement.

[0011] The present invention is further configured such that: a positioning ring groove is provided on the end face of the mounting ring facing the cap, one end of the positioning liner is inserted into the positioning ring groove, and the other end is inserted into the inner hole of the convex ring of the cap.

[0012] The present invention is further configured such that the bolt assembly includes a long bolt and a nut, wherein the long bolt passes through the cap, the positioning liner and the mounting ring in sequence and then engages with the nut to lock it in place.

[0013] The present invention is further configured such that the pulley is mounted on one end of the swing arm via a bearing and is fixed by a short bolt.

[0014] This invention relates to a double-damped tensioning wheel, which, through a combination of a double-damping structure and a torsion spring buffer, can significantly suppress the vibration amplitude of the swing arm under impact loads, thereby ensuring the stable operation of the transmission system. Its specific beneficial effects are as follows:

[0015] 1. Dual damping effect to suppress impact vibration.

[0016] The upper and lower damping rings are pressed together by an upper and lower clamping ring, respectively. The clamping ring rotates with the cap, while the damping ring is fixed with the mounting cover. The two generate stable frictional damping when they rotate relative to each other. This dual-damping structure can absorb impact energy at both the upper and lower positions when the swing arm is subjected to a sudden strong load, avoiding the large-amplitude swing caused by insufficient damping force in a single-damping structure, and effectively reducing the risk of belt slippage.

[0017] 2. Uniform damping force distribution reduces localized wear.

[0018] The upper and lower damping rings are symmetrically arranged on the outer wall of the mounting ring, so that the damping force is evenly distributed along the axial direction, avoiding the uneven wear caused by unilateral damping, improving the service life of the damping components, and maintaining the overall balance of the tensioning wheel.

[0019] 3. The tightening ring rotates synchronously with the cap to ensure damping stability.

[0020] The upper and lower clamping rings are hooked to the groove on the limiting ring by a pull hook, so that the clamping ring always rotates synchronously with the cap and there will be no relative slippage or loosening. This ensures the continuity and stability of the damping effect and can work reliably even under long-term high-load conditions.

[0021] 4. The positioning liner and the positioning ring groove fit together to enhance structural rigidity.

[0022] The positioning liner is secured in the gap between the convex ring and the mounting ring by a positioning ring and inserted into the positioning ring groove. This not only restricts axial displacement but also improves the connection rigidity between the swing arm and the mounting cover, reduces connection loosening caused by impact, and further enhances transmission reliability.

[0023] 5. The torsion spring and damping structure work together to improve dynamic response performance.

[0024] The torsion spring provides continuous tension, keeping the belt at the appropriate tension; the dual damping structure absorbs excess energy during dynamic impacts. The two work together to ensure that the tensioner pulley maintains good transmission performance under both static and dynamic conditions, adapting to the complex and ever-changing operating environment of engineering vehicles.

[0025] 6. Simple and compact structure, easy to assemble and maintain.

[0026] The upper damping ring, lower damping ring, upper clamping ring, and lower clamping ring are all open ring structures, which do not require disassembly of other major components during installation, making assembly convenient; the damping components can be replaced individually after wear, reducing maintenance costs.

[0027] Through the above-mentioned technical effects, this utility model effectively solves the problem of large vibration of the tensioner and belt slippage caused by instantaneous strong load in the transmission system of engineering vehicle engine, significantly improving the stability and service life of the transmission system, and has high practical value and promotion significance.

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of a specific embodiment of the present utility model;

[0030] Figure 2 This is a perspective view of the swing arm in a specific embodiment of the present utility model;

[0031] Figure 3 This is a perspective view of a portion of the structure in a specific embodiment of this utility model.

[0032] Explanation of reference numerals in the attached drawings: 101, mounting cover; 102, swing arm; 103, pulley; 104, torsion spring; 105, bearing; 106, short bolt; 107, long bolt; 108, mounting ring; 109, first annular groove; 110, screw cap; 111, convex ring; 112, positioning ring groove; 113, positioning liner; 114, positioning ring; 115, limiting ring; 116, limiting groove; 117, mating groove; 118, torsion spring groove; 119, upper damping ring; 120, lower damping ring; 121, upper tightening ring; 122, lower tightening ring; 123, hook; 124, convex wall; 125, hook groove. Detailed Implementation

[0033] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0034] like Figure 1 — Figure 3 As shown, this embodiment discloses a dual-damping tensioning pulley including a mounting cover 101, a swing arm 102, and a pulley 103. A torsion spring 104 is disposed between the mounting cover 101 and the swing arm 102. A bearing 105 is mounted on the inner ring of the pulley 103 and is fixed to one end of the swing arm 102 by a short bolt 106, allowing the pulley 103 to rotate freely relative to the swing arm 102. The other end of the swing arm 102 is rotatably connected to the mounting cover 101 by a long bolt 107.

[0035] A raised mounting ring 108 is provided at the central axis position of the mounting cover 101, and a first annular groove 109 is formed between the outer wall of the mounting ring 108 and the inner wall of the mounting cover 101. A screw cap 110 corresponding to the mounting ring 108 is fixed on the swing arm 102. A protruding ring 111 is provided on the outer end face of the screw cap 110, and a positioning ring groove 112 is provided on the end face of the mounting ring 108 facing the screw cap 110. A long bolt 107 passes through the inner hole of the protruding ring 111, the positioning liner 113 and the mounting ring 108 in sequence, and is locked at the end of the long bolt 107 by a nut. A positioning ring 114 is provided on the outer wall of the positioning liner 113. The positioning ring 114 is engaged in the gap between the protruding ring 111 and the mounting ring 108 to limit axial displacement. One end of the positioning liner 113 is inserted into the positioning ring groove 112, and the other end is inserted into the inner hole of the protruding ring 111, thereby realizing a stable rotational connection between the mounting cover 101 and the swing arm 102.

[0036] The inner cavity of the screw cap 110 is provided with a limiting ring 115, which is inserted into the first annular groove 109. A limiting groove 116 is formed between the limiting ring 115 and the inner side wall of the screw cap 110. The mounting cover 101 is provided with a mating groove 117 corresponding to the limiting groove 116. The limiting groove 116 and the mating groove 117 together form a torsion spring groove 118. The torsion spring 104 is installed in the torsion spring groove 118. The two ends of the torsion spring 104 act on the mounting cover 101 and the swing arm 102 respectively to provide continuous tension.

[0037] An upper damping ring 119 and a lower damping ring 120 are fitted onto the outer wall of the mounting ring 108. Both the upper damping ring 119 and the lower damping ring 120 are open ring structures made of elastic and wear-resistant materials, such as rubber or polymer composites. An upper clamping ring 121 is fitted onto the upper damping ring 119, and a lower clamping ring 122 is fitted onto the lower damping ring 120. Both the upper clamping ring 121 and the lower clamping ring 122 are open rings, with their open ends bent outward to form hooks 123. The limiting ring 115 has protruding walls 124 that correspond one-to-one with the upper clamping ring 121 and the lower clamping ring 122. The protruding walls 124 have hook grooves 125. The upper clamping ring 121 and the lower clamping ring 122 are hooked into the corresponding hook grooves 125 by hooks 123, thereby keeping the clamping rings and the cap 110 rotating synchronously.

[0038] During transmission, the engine drives the pulley 103 to rotate, and the swing arm 102 maintains tension on the belt under the action of the torsion spring 104. When the transmission system is subjected to an instantaneous impact load, the swing arm 102 swings around the long bolt 107, and the cover 110 rotates accordingly. The upper clamping ring 121 and the lower clamping ring 122 rotate synchronously with the cover 110, generating frictional damping with the upper damping ring 119 and the lower damping ring 120 respectively, absorbing impact energy and suppressing the vibration amplitude of the swing arm 102. Since the upper damping ring 119 and the lower damping ring 120 are symmetrically arranged, the damping force is evenly distributed along the axial direction, avoiding the uneven wear phenomenon caused by unilateral damping. At the same time, the fit between the positioning liner 113 and the positioning ring groove 112 improves the connection rigidity and prevents loosening caused by impact.

[0039] This invention, through the synergistic effect of the dual damping structure and the torsion spring 104, can maintain stable tension and damping effect under both static and dynamic working conditions, effectively preventing belt slippage and extending the service life of the transmission system. It is particularly suitable for high-load and high-impact operating environments such as engineering vehicles.

Claims

1. A double-damping tensioning pulley, comprising a mounting cover (101), a swing arm (102), and a pulley (103), wherein a torsion spring (104) is disposed between the mounting cover (101) and the swing arm (102), the pulley (103) is rotatably mounted on one end of the swing arm (102), and the other end of the swing arm (102) is rotatably connected to the mounting cover (101) via a bolt assembly; characterized in that, The mounting cover (101) is provided with a mounting ring (108), and the swing arm (102) is provided with a cap (110) corresponding to the mounting ring (108). A positioning liner (113) is provided between the mounting ring (108) and the cap (110). A torsion spring groove (118) is provided inside the cap (110), and a torsion spring (104) is installed in the torsion spring groove (118). At least two damping rings (119, 120) are fitted on the mounting ring (108), and a clamping ring (121, 122) is fitted on the outside of each damping ring. The clamping rings (121, 122) rotate synchronously with the cap (110) and rub against the corresponding damping rings (119, 120) to provide damping when the swing arm (102) swings.

2. The dual-damping type tensioner of claim 1, wherein The damping rings (119, 120) are open ring structures and are made of elastic wear-resistant material.

3. The dual-damping type tensioner of claim 1, wherein The tightening rings (121, 122) are open rings with hooks (123) at both ends of the opening. The cap (110) is provided with a limiting ring (115). The limiting ring (115) is provided with a hook groove (125) that cooperates with the hook (123). The tightening rings (121, 122) are connected to the hook groove (125) by the hook (123) and rotate synchronously with the cap (110).

4. The dual-damping type tensioner of claim 1, wherein A first annular groove (109) is formed between the outer wall of the mounting ring (108) and the inner wall of the mounting cover (101), and the damping rings (119, 120) are sleeved on the mounting ring (108) and located in the first annular groove (109).

5. The double-damped tensioner according to claim 1, characterized in that, The outer wall of the positioning liner (113) is provided with a positioning ring (114), which is engaged in the gap between the convex ring (111) and the mounting ring (108) of the cap (110) to limit axial displacement.

6. The dual-damping type tensioner of claim 1, wherein The mounting ring (108) has a positioning ring groove (112) on the end face facing the cap (110). One end of the positioning liner (113) is inserted into the positioning ring groove (112), and the other end is inserted into the inner hole of the protruding ring (111) of the cap (110).

7. The dual-damping type tensioner of claim 1, wherein The bolt assembly includes a long bolt (107) and a nut. The long bolt (107) passes through the cap (110), the positioning liner (113) and the mounting ring (108) in sequence and then engages with the nut to lock it in place.

8. The dual-damping type tensioner of claim 1, wherein The pulley (103) is mounted on one end of the swing arm (102) via a bearing (105) and fixed by a short bolt (106).

Images