Tensioning structure, belt tensioner and bicycle

Abstract

The utility model discloses a tensioning structure, belt tensioner and bicycle relates to tensioning adjustment technical field, wherein the tensioning structure includes connecting piece, pressing piece and elastic piece, connecting piece includes first connecting section and second connecting section, first connecting section and second connecting section are fixedly connected, first connecting section is used for connecting with the supported object, and second connecting section is used for connecting with the supported object. The second connecting section is used for being connected with a support; the pressing piece is detachably arranged on the second connecting section; the second connecting section is sleeved with the elastic piece, the elastic piece comprises a first torsion arm and a second torsion arm, the first torsion arm abuts against the supporting object in a limiting mode, the second torsion arm abuts against the pressing piece in a limiting mode, and the elastic piece can be used for buffering vibration force transmitted to the supporting object by the supporting object; when the tensioning structure provided by the utility model is arranged in the belt tensioner, the belt can be kept in a safe range to work normally in a shock-proof stroke of the bicycle or after the stroke is finished.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioning adjustment, in particular to a tensioning structure, a belt tensioner and a bicycle. Background Art

[0002] At present, the existing tensioning structure is generally used as a shock absorber or in a pulley transmission system because of its adjustment function, making it not easy to get off the chain, not slipping at high speed, high efficiency, long life, space saving, low noise, large speed ratio, lightweight and no need to add lubricant to keep clean and many other advantages. Therefore, there is a need to provide a safe and reliable belt tensioning system that can work normally for a long time. Utility Model Content

[0003] The main purpose of the utility model is to provide a tensioning structure, a belt tensioner and a bicycle, aiming to solve the problem that the belt tensioning force needs to be adjusted by the user himself, which affects the use experience.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a tensioning structure, comprising:

[0005] A connecting member, the connecting member comprising a first connecting section and a second connecting section, the first connecting section and the second connecting section are fixedly connected, the first connecting section is used to connect to a supported object, and the second connecting section is used to connect to a support;

[0006] A pressing member, detachably arranged on the second connecting section;

[0007] An elastic member is sleeved on the second connecting section, and the elastic member includes a first torsion arm and a second torsion arm. The first torsion arm is in limited abutment with the support, and the second torsion arm is in limited abutment with the clamping member. The elastic member can be used to buffer the vibration force transmitted from the supported object to the supporting object.

[0008] In one embodiment, at least one cutting groove is provided at an end of the second connecting section away from the first connecting section, and the cutting groove is opened along the length direction of the second connecting section;

[0009] The pressing member is provided with a slot, and the slot is adapted to an end of the second connecting section away from the first connecting section.

[0010] In one embodiment, the end of the second connecting section having the cutting groove is also provided with a mounting hole, and the mounting hole is opened perpendicular to the length direction of the second connecting section;

[0011] The pressing piece is provided with a positioning hole, the positioning hole is arranged through the cutting groove, and the positioning hole corresponds to the mounting hole.

[0012] In one embodiment, at least one protrusion is provided on the outer periphery of the end of the second connecting section close to the first connecting section;

[0013] An installation groove is provided at the end of the first connecting section close to the second connecting section, and the installation groove is adapted to the protruding portion.

[0014] In one embodiment, the elastic member is disposed between the pressing member and the first connecting section, and the elastic member is exposed outside the pressing member.

[0015] In one embodiment, the clamping member includes a connecting portion and an abutting portion, the connecting portion is used to connect with the second connecting section, the abutting portion has an abutting surface for abutting with the second torsion arm, and the abutting surface is inclined along the extension direction of the second torsion arm.

[0016] In one embodiment, the belt tensioner further includes a bushing, and the bushing is arranged between the second connecting section and the elastic member.

[0017] The utility model also provides a belt tensioner, which is applied to a vehicle body, wherein the vehicle body includes a frame and a belt, and includes:

[0018] A tensioning wheel, used for pressing the belt and rotatably connected to the belt; and

[0019] As described in the tensioning structure in the above embodiment, the first connecting section of the tensioning structure is used to be rotatably connected to the tensioning wheel, and the elastic member can be used to push the clamping member to drive the second connecting section and the first connecting section to rotate relative to the frame, and drive the tensioning wheel to move to adjust the tightness of the belt.

[0020] In one embodiment, the vehicle body further comprises a mounting seat, the mounting seat is arranged on the vehicle frame, the mounting seat is provided with a through hole, the second connecting section passes through the through hole and is rotatably connected to the mounting seat, the mounting seat comprises a stopper, and the stopper is used to abut against the first torque arm in a limiting manner; and / or

[0021] The mounting seat further comprises a bearing, wherein the bearing is disposed in a through hole of the mounting seat, and the second connecting section passes through the bearing and is rotatably connected to the mounting seat.

[0022] The utility model also provides a bicycle, comprising the belt tensioner as described in the above embodiment.

[0023] The technical solution of the utility model can not only solve the problem of vibration conduction through the arrangement of the tensioning structure, but also can solve the problem that when the bicycle is arranged in a rear fork shock absorption structure, a belt transmission system can be arranged to realize transmission. When the belt is in a shock absorption stroke of the bicycle, the belt tensioner can make corresponding tightness changes under the elastic support of the elastic member, so that the belt can be kept in a safe range and work normally during the shock absorption stroke of the bicycle or after the stroke is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 An exploded schematic diagram of the tensioning structure provided by the utility model;

[0026] Figure 2 A schematic diagram of the structure of the belt tensioner provided by the utility model installed on a vehicle frame;

[0027] Figure 3 for Figure 2 Schematic diagram of the structure of the middle belt tensioner;

[0028] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the middle belt tensioner;

[0029] Figure 5 for Figure 3 A schematic diagram of the structure of the first connecting section;

[0030] Figure 6 for Figure 3 A schematic diagram of the structure of the second connecting section;

[0031] Figure 7 for Figure 3 Structural schematic diagram of the middle pressing member;

[0032] Figure 8 for Figure 2 Schematic diagram of the structure of the middle mounting seat.

[0033] Description of Figure Numbers:

[0034] 100, tensioning structure; 110, connecting member; 111, first connecting section; 1111, first connecting part; 1112, bending part; 1113, second connecting part; 112, second connecting section; 1121, mounting hole; 1122, cutting groove; 1123, protruding part; 120, tensioning wheel; 130, elastic member; 131, first torsion arm; 132, second torsion arm; 140, pressing member; 141, connecting part; 1411, slot; 1412, positioning hole; 142, abutting part; 1421, abutting surface; 150, bushing;

[0035] 200, frame; 210, upper frame; 220, lower frame; 230, mounting seat; 231, stopper;

[0036] 300, transmission assembly; 310, transmission wheel; 320, belt; 330, linkage wheel.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] Most of the belt-driven bicycles on the market currently do not have a shock-absorbing function on the rear fork, and the riding comfort is poor. For bicycles with a rear fork shock-absorbing function, when the bicycle shock-absorbing stroke is compressed, the distance between the center of the bicycle and the rear axle becomes longer, and the current belts do not have the function of self-adjusting tension. In addition, the tension of the transmission belt needs to be fixed within a safe range to work normally. Therefore, in order to improve the riding comfort of users, it is necessary to design a bicycle with a rear fork shock-absorbing function and a belt drive, and the belt has the function of self-adjusting tension.

[0042] The utility model provides a tensioning structure 100 .

[0043] See also Figure 1 As shown, the tensioning structure 100 includes a connecting member 110, a pressing member 140 and an elastic member 130, the connecting member 110 includes a first connecting section 111 and a second connecting section 112, the first connecting section 111 and the second connecting section 112 are fixedly connected, the first connecting section 111 is used to connect to a supported object, and the second connecting section 112 is used to connect to a supporting object; the pressing member 140 is detachably arranged on the second connecting section 112; the elastic member 130 is sleeved on the second connecting section 112, the elastic member 130 includes a first torsion arm 131 and a second torsion arm 132, the first torsion arm 131 is in limited abutment with the supporting object, and the second torsion arm 132 is in limited abutment with the pressing member 140, and the elastic member 130 can be used to buffer the vibration force transmitted from the supported object to the supporting object.

[0044] The technical solution of the present invention is to install the tensioning structure 100 on the support with the connecting member 110 as the fixing member, and divide the connecting member 110 into a first connecting section 111 and a second connecting section 112, and the two are fixedly connected, wherein the supported object is arranged at one end of the first connecting section 111 away from the second connecting section 112, so that the supported object is connected to the support through the tensioning structure 100. Since the tensioning structure 100 also includes an elastic member 130, when the supported object or the support vibrates, the elastic member 130 in the tensioning structure 100 can buffer the vibration force transmitted from the first connecting section 111 and the second connecting section 112, so as to achieve a better vibration reduction effect. In this embodiment, the support and the supported object can be any two objects or components or structural members that need to be connected, and no excessive restrictions are made here.

[0045] In one embodiment, if Figure 4 , Figure 6 and Figure 7 As shown, at least one cutting groove 1122 is provided at the end of the second connecting section 112 away from the first connecting section 111, and the cutting groove 1122 is opened along the length direction of the second connecting section 112; the clamping piece 140 is provided with a slot 1411, and the slot 1411 is adapted to the end of the second connecting section 112 away from the first connecting section 111. Since the second connecting section 112 and the clamping piece 140 are in transmission connection, in order to enhance the connection stability between the clamping piece 140 and the second connecting section 112, in this embodiment, at least one cutting groove 1122 is provided at the end of the second connecting section 112 away from the first connecting section 111. For ease of explanation, the following is an example in which two cutting grooves 1122 are provided. The two cutting grooves 1122 are symmetrically arranged at the end of the second connecting section 112 away from the first connecting section 111 along the length direction of the second connecting section 112, and a slot 1411 is provided on the clamping piece 140 with reference to the end of the second connecting section 112 away from the first connecting section 111. The slot 1411 is adapted to the end of the second connecting section 112 away from the first connecting section 111. The end of the second connecting section 112 is formed into a flat shape due to the setting of the cutting groove 1122. The flat end can better realize plug-in cooperation with the clamping piece 140 and can better realize rotational transmission with the clamping piece 140.

[0046] Furthermore, the end of the second connecting section 112 having the cutting groove 1122 is also provided with a mounting hole 1121, which is opened perpendicular to the length direction of the second connecting section 112; the clamping piece 140 is provided with a positioning hole 1412, which passes through the cutting groove 1122 and corresponds to the mounting hole 1121. In order to further enhance the connection stability between the second connecting section 112 and the clamping piece 140, a mounting hole 1121 is provided on the end face of the cutting groove 1122 of the second connecting section 112. The mounting hole 1121 is provided perpendicular to the cutting groove 1122, and a positioning hole 1412 is provided on the clamping piece 140. When the end of the second connecting section 112 is inserted into the slot 1411, the mounting hole 1121 corresponds to the positioning hole 1412. At this time, the mounting hole 1121 and the positioning hole 1412 can be penetrated by a screw or a latch to fix the clamping piece 140 to the end of the second connecting section 112. Through such a setting, the clamping piece 140 and the end of the second connecting section 112 are fixedly connected from two vertical directions, so that the rotation angle of the clamping piece 140 and the second connecting section 112 is reduced when they are rotated together.

[0047] In one embodiment, if Figures 4 to 6 As shown, at least one protrusion 1123 is provided on the outer periphery of the end of the second connecting section 112 close to the first connecting section 111; and a mounting groove is provided on the end of the first connecting section 111 close to the second connecting section 112, and the mounting groove is adapted to the protrusion 1123. Similar to the above embodiment, in order to reduce the transmission angle loss after the second connecting section 112 is connected to the first connecting section 111, and at the same time increase the connection problem of the second connecting section 112 to the first connecting section 111, therefore, in this embodiment, at least one protrusion 1123 is provided on the end of the second connecting section 112 for connecting with the first connecting section 111. For the convenience of description, the following is used. Figure 5As shown, a protrusion 1123 is used as an example for explanation. The direction of the protrusion 1123 can be set in any direction along the circumference of the second connecting section 112, and no excessive restrictions are made here. In order to make the second connecting section 112 and the first connecting section 111 connect better, therefore, a mounting groove with the second connecting section 1113 and the protrusion 1123 as reference is opened on the first connecting section 111. The mounting groove is used to be plugged with the end of the second connecting section 112 provided with the protrusion 1123. In order to further improve the firmness between the second connecting section 112 and the first connecting section 111, a protrusion 1123 is provided on the second connecting section 112. A threaded groove is provided at one end along its length direction. When connecting the second connecting section 112 and the first connecting section 111, the end of the second connecting section 112 with the protrusion 1123 can be inserted into the end of the first connecting section 111 with the installation groove, and then the end is threadedly connected to the thread opened on the second connecting section 112 through a screw connection passing through the installation groove. Since the nut of the screw connection is larger than the diameter of the installation groove, the second connecting section 112 can be firmly connected to the first connecting section 111. The setting of the protrusion 1123 is consistent with the above embodiment, and the rotation angle loss of the second connecting section 112 and the first connecting section 111 during transmission can also be reduced.

[0048] In one embodiment, if Figure 1 and Figure 3 As shown, the elastic member 130 is disposed between the pressing member 140 and the first connecting section 111, and the elastic member 130 is exposed outside the pressing member 140. The elastic member 130 is disposed between the first connecting section 111 and the pressing member 140, and the elastic member 130 is disposed close to the pressing member 140. Secondly, the elastic member 130 is exposed outside the pressing member 140, and the elastic member 130 may be only the second torsion arm 132 located inside the pressing member 140. Such an arrangement can facilitate the assembly of the tensioning structure 100.

[0049] In one embodiment, if Figure 7As shown, the pressing member 140 includes a connecting portion 141 and an abutting portion 142 . The connecting portion 141 is used to connect with the second connecting section 112 . The abutting portion 142 has an abutting surface 1421 for abutting with the second torsion arm 132 . The abutting surface 1421 is inclined along the extension direction of the second torsion arm 132 . In the present embodiment, the clamping member 140 includes a connecting portion 141 and a butting portion 142, wherein a slot 1411 and a positioning hole 1412 are provided on the connecting portion 141, and the butting portion 142 protrudes from the connecting portion 141, and the butting portion 142 protrudes in a direction close to the elastic member 130. In order to enable the butting portion 142 to better achieve limited butting with the second torsion arm 132 of the elastic member 130, in the present embodiment, the butting portion 142 is provided with a butting surface 1421, and the butting surface 1421 is gradually inclined downward along the direction from the connecting portion 141 to the butting portion 142, so that the butting surface 1421 can increase the contact area with the second torsion arm 132, so that the butting effect between the second torsion arm 132 and the butting portion 142 is better.

[0050] In one embodiment, if Figure 4 As shown, the tensioning structure 100 further includes a bushing 150, which is disposed between the second connecting section 112 and the elastic member 130. Since the second connecting section 112 is used for rotational connection with the frame 200, and the elastic member 130 is consistent with the frame 200 and maintains a relative state, in order to prevent the second connecting section 112 from affecting the elastic member 130 when rotating, or to prevent the elastic member 130 from affecting the second connecting section 112 when rotating, a bushing 150 is further disposed between the second connecting section 112 and the elastic member 130, and the bushing 150 can reduce the influence of the two on each other.

[0051] The utility model also proposes a belt tensioner, which is applied to a vehicle body, wherein the vehicle body includes a frame and a belt, including a tensioning wheel, and the tensioning structure in the above-mentioned embodiment, wherein the tensioning wheel is used to press the belt and is rotatably connected to the belt; and the tensioning structure in the above-mentioned embodiment, wherein the first connecting section of the tensioning structure is used to be rotatably connected to the tensioning wheel, and the elastic member can be used to push the pressing member to drive the second connecting section and the first connecting section to rotate relative to the frame, and drive the tensioning wheel to move, so as to adjust the tightness of the belt.

[0052] See also Figures 2 to 4In one embodiment of the utility model, the belt tensioner is applied to a vehicle body, the vehicle body includes a frame 200 and a belt 320, including a tensioning wheel 120, a connecting member 110, a pressing member 140 and an elastic member 130, wherein the tensioning wheel 120 is used to press the belt 320 and is rotatably connected to the belt 320; the connecting member 110 includes a first connecting section 111 and a second connecting section 112, the first connecting section 111 and the second connecting section 112 are fixedly connected, the second connecting section 112 is used to be connected to the frame 200 and is rotatably arranged on the frame 200, and the tensioning wheel 120 is rotatably arranged At one end of the first connecting section 111 away from the second connecting section 112; the pressing member 140 is detachably arranged on the second connecting section 112; the elastic member 130 is sleeved on the second connecting section 112, and the elastic member 130 includes a first torsion arm 131 and a second torsion arm 132, the first torsion arm 131 is limitedly abutted against the frame 200, and the second torsion arm 132 is limitedly abutted against the pressing member 140, and the elastic member 130 is used to push the pressing member 140 to drive the second connecting section 112 and the first connecting section 111 to rotate relative to the frame 200, and drive the tensioning wheel 120 to move, so as to adjust the tightness of the belt 320;

[0053] The technical solution of the utility model is to install the belt tensioner on the vehicle body with the connecting member 110 as the fixing member, and divide the connecting member 110 into a first connecting section 111 and a second connecting section 112, and the two are fixedly connected, wherein the tensioning wheel 120 is rotatably arranged at one end of the first connecting section 111 away from the second connecting section 112, and the tensioning wheel 120 is detachably connected to the first connecting section 111, and then the second connecting section 112 is rotatably connected to the frame 200 of the vehicle body, and then connected to the frame 200. In order to make the belt tensioner have a self-adjusting function, a pressing member 140 is detachably installed on the second connecting section 112, and an elastic member 130 is sleeved on the outer periphery close to the pressing member 140, and the elastic member 130 includes The first torsion arm 131 and the second torsion arm 132, wherein the first torsion arm 131 is in limited contact with the frame 200, and the second torsion arm 132 is in limited contact with part of the clamping member 140. Since the first torsion arm 131 of the elastic member 130 is in limited contact with the frame 200, and the frame 200 remains stationary, the elastic force of the elastic member 130 itself will be released through the second torsion arm 132. Since the second torsion arm 132 is in limited contact with the clamping member 140, and the clamping member 140 is detachably connected to the second connecting section 112, the second connecting section 112 is fixedly connected to the first connecting section 111, and the first connecting section 111 is rotatably connected to the tensioning wheel 120, the elastic member 130 can push the clamping member 140 along the tensioning wheel 120 through the second torsion arm 132. The axis of the second connecting section 112 rotates in a direction away from the first torsion arm 131. When the pressing member 140 rotates, the second connecting section 112 and the first connecting section 111 are simultaneously driven to rotate relative to the vehicle frame 200. Since the end of the first connecting section 111 away from the second connecting section 112 is rotatably connected to the tensioning wheel 120, the tensioning wheel 120 can be driven to move when the first connecting section 111 rotates relative to the vehicle frame 200, so that the tensioning wheel 120 and the belt 320 maintain stable contact. In this embodiment, when the distance between the center of the vehicle body and the rear axle becomes longer due to the shock absorbing stroke, the tensioning wheel 120 moves due to the pressure of the belt 320. At this time, the tensioning wheel 120 drives the second connecting section 112 and the pressure wheel 320 through the first connecting section 111. The tightening member 140 rotates relative to the bicycle frame 200. When the pressing member 140 rotates, the first torsion arm 131 of the elastic member 130 is forced to rotate in the direction of the second torsion arm 132, so that the elastic member 130 is further compressed, so that the elastic force storage is more sufficient. When the shock absorbing stroke of the bicycle body ends, the elastic member 130 pushes the pressing member 140 to rotate in the opposite direction, so that the tensioning wheel 120 linked with the pressing member 140, the second connecting section 112 and the first connecting section 111 always maintains elastic contact with the belt 320, so that the belt 320 always maintains normal operation within a safe range. This arrangement can solve the problem that the bicycle can be equipped with a rear fork shock absorbing function while realizing transmission through the belt 320, and when the belt 320 is in the shock absorbing stroke of the bicycle,The belt tensioner can make corresponding changes in tightness.

[0054] In another embodiment, if Figure 2 and Figure 8 As shown, the vehicle body also includes a mounting seat 230, which is arranged on the frame 200, and the mounting seat 230 is provided with a through hole. The second connecting section 112 passes through the through hole and is rotatably connected to the mounting seat 230. The mounting seat 230 includes a stop portion 231, and the stop portion 231 is used to limit the abutment with the first torsion arm 131. In order to make the second connecting section 112 be better installed on the frame 200, in the present embodiment, the vehicle body further includes a mounting seat 230, which is installed on the frame 200. The mounting seat 230 may be integrally arranged with the frame 200, or may be detachably arranged with the frame 200 through the connecting member 110. No further limitation is made here. A through hole is provided on the mounting seat 230. When the second connecting section 112 is installed, the second connecting section 112 may be passed through the through hole to realize rotational connection with the mounting seat 230. In order to facilitate the limiting abutment of the first torsion arm 131 of the elastic member 130, a stopper 231 is further provided on the mounting seat 230. When the second connecting section 112 is passed through the through hole and rotationally connected with the mounting seat 230, the first torsion arm 131 in the elastic member 130 sleeved on the outer periphery of the second connecting section 112 is limitedly abutted with the stopper 231.

[0055] Furthermore, the mounting seat 230 further includes a bearing, which is disposed in the through hole of the mounting seat 230, and the second connecting section 112 is rotatably connected to the mounting seat 230 through the bearing. In order to improve the rotational stability between the mounting seat 230 and the second connecting section 112, and to make the second connecting section 112 rotate more smoothly with the mounting seat 230 as the fulcrum, in this embodiment, a bearing is installed in the through hole of the mounting seat 230, and the second connecting section 112 is rotatably connected to the mounting seat 230 by passing through the bearing. Such an arrangement makes the rotational connection between the second connecting section 112 and the mounting seat 230 better, more stable, and smoother.

[0056] The utility model also proposes a bicycle, which includes a bicycle body and the above-mentioned belt tensioner. The specific structure of the belt tensioner refers to the above-mentioned embodiment. Since the bicycle adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0057] In one embodiment, if Figure 2 and Figure 5As shown, the bicycle frame 200 includes an upper frame 210 and a lower frame 220, wherein the distance between the upper frame 210 and the lower frame 220 is gradually reduced along the direction from the linkage wheel 330 to the transmission wheel 310, so that the first connecting section 111 will not cause a collision with the lower frame 220 when rotating with the second connecting section 112, therefore, in this embodiment, the first connecting section 111 includes a first connecting portion 1111, a bending portion 1112 and a second connecting portion 1113, wherein the first connecting portion 1111 is used to connect with the second connecting section 112. The two connecting sections 112 are detachably connected, the second connecting portion 1113 is used for rotatably connecting with the tensioning wheel 120, and the bending portion 1112 is used for connecting the first connecting portion 1111 and the second connecting portion 1113, wherein the bending portion 1112 is arranged along the extension direction of the second connecting section 112 from one end close to the first connecting portion 1111 to the other end away from the first connecting portion 1111. Such an arrangement can effectively prevent the first connecting section 111 from causing collision to the lower frame 220 when rotating with the second connecting section 112.

[0058] In another embodiment, the bicycle includes a transmission assembly 300, wherein the transmission assembly 300 includes a transmission wheel 310, a belt 320 and an interlocking wheel 330, wherein the belt 320 is meshedly connected with the transmission wheel 310 and the interlocking wheel 330, that is, meshing teeth are arranged on the inner side of the belt 320. Since in this embodiment, the bicycle is provided with any of the above-mentioned belt tensioners, when the belt tensioner is put into use on the bicycle, the tensioning wheel 120 can be used to squeeze the lower side of the belt 320 so that the lower side of the belt 320 contacts the upper side, and the meshing teeth above and below the belt 320 are meshed, which can make the belt 320 more labor-saving when transmitting.

[0059] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A tensioning structure, characterized in that: include: A connecting member, the connecting member comprising a first connecting section and a second connecting section, the first connecting section and the second connecting section are fixedly connected, the first connecting section is used to connect to a supported object, and the second connecting section is used to connect to a support; A pressing member, detachably arranged on the second connecting section; An elastic member is sleeved on the second connecting section, and the elastic member includes a first torsion arm and a second torsion arm. The first torsion arm is in limited abutment with the support, and the second torsion arm is in limited abutment with the clamping member. The elastic member can be used to buffer the vibration force transmitted from the supported object to the supporting object.

2. The tensioning structure according to claim 1, characterized in that: At least one cutting groove is provided at an end of the second connecting section away from the first connecting section, and the cutting groove is opened along the length direction of the second connecting section; The pressing member is provided with a slot, and the slot is adapted to an end of the second connecting section away from the first connecting section.

3. The tensioning structure according to claim 2, characterized in that: The end of the second connecting section having the cutting groove is also provided with a mounting hole, and the mounting hole is opened perpendicular to the length direction of the second connecting section; The pressing piece is provided with a positioning hole, the positioning hole is arranged through the cutting groove, and the positioning hole corresponds to the mounting hole.

4. The tensioning structure according to claim 1, characterized in that: At least one protrusion is provided on the outer periphery of the end of the second connecting section close to the first connecting section; An installation groove is provided at the end of the first connecting section close to the second connecting section, and the installation groove is adapted to the protruding portion.

5. The tensioning structure according to claim 1, characterized in that: The elastic member is arranged between the pressing member and the first connecting section, and the elastic member is exposed outside the pressing member.

6. The tensioning structure according to claim 1, characterized in that: The pressing member includes a connecting portion and an abutting portion, wherein the connecting portion is used to be connected to the second connecting section, and the abutting portion has an abutting surface for abutting against the second torsion arm, and the abutting surface is inclined along the extending direction of the second torsion arm.

7. The tensioning structure according to claim 1, characterized in that: The tensioning structure further includes a bushing, which is arranged between the second connecting section and the elastic member.

8. A belt tensioner, applied to a vehicle body, the vehicle body comprising a frame and a belt, characterized in that: include: A tensioning wheel, used for pressing the belt and being rotatably connected to the belt; as well as According to any one of claims 1 to 7, the first connecting section of the tensioning structure is used for rotationally connecting to the tensioning wheel, and the elastic member can be used to push the clamping member to drive the second connecting section and the first connecting section to rotate relative to the frame, and drive the tensioning wheel to move, so as to adjust the tightness of the belt.

9. The belt tensioner according to claim 8, characterized in that The vehicle body further comprises a mounting seat, the mounting seat is arranged on the vehicle frame, the mounting seat is provided with a through hole, the second connecting section passes through the through hole and is rotatably connected to the mounting seat, the mounting seat comprises a stopper, the stopper is used to abut against the first torsion arm in a limiting manner; and / or The mounting seat further comprises a bearing, wherein the bearing is disposed in a through hole of the mounting seat, and the second connecting section passes through the bearing and is rotatably connected to the mounting seat.

10. A bicycle, characterized in that: Comprising a belt tensioner as claimed in any one of claims 8 to 9.

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