Autotensioning timing chain

Abstract

The utility model relates to a kind of self-tightening chain adjuster, including the mounting seat connected with outside vehicle, the roller support being set on mounting seat, the tensioner wheel is rotatably connected on the roller support, tensioner wheel keeps state of being pressed down or lifted up and being in contact on vehicle chain, the relative position between tensioner wheel and mounting seat is self-float adjustment.This application solves the problem of easy loosening, falling off of electric bicycle chain and inconvenience of traditional manual adjustment of chain tightness.And automatically adjust to the best tightness state, ensure the stable operation of electric bicycle.

Description

Technical Field

[0001] This utility model relates to the technical field of electric vehicle chain accessories, and in particular to an autonomous tensioner for adjusting the chain tension. Background Technology

[0002] During use, the chain of a traditional electric bicycle is prone to loosening due to prolonged wear or poor road conditions, which can lead to the chain falling off or making abnormal noises, affecting the riding experience and safety.

[0003] Currently, when a chain becomes loose, the most common repair method is to manually adjust the chain tension, which is cumbersome and difficult to control accurately. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a self-tensioning chain adjuster with a reasonable structure. By realizing a preset spring torque, it applies a force within the expected range to the chain, ensuring that the chain has a suitable tension.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A self-tensioning chain adjuster includes a mounting base for connection to an external vehicle and a roller bracket mounted on the mounting base. A tension wheel is rotatably connected to the roller bracket, and the tension wheel is constantly kept in a state of downward or upward contact with the vehicle chain.

[0007] The relative position between the tensioning wheel and the mounting base is autonomously adjustable by floating.

[0008] As a further improvement to the above technical solution:

[0009] The outer circumference of the tensioner wheel is concave to form a limiting space to accommodate the chain.

[0010] A pin passes through the roller bracket, and the roller is sleeved on the pin; an elastic element sleeved on the pin is provided between the roller and the pin.

[0011] The elastic element provides the roller with a radial elastic restoring force in the vertical direction.

[0012] An elastic element is provided between the mounting base and the roller bracket. The roller bracket is based on the mounting base and is pushed and tightened by the elastic restoring force in the vertical direction, and the tension wheel abuts against the chain.

[0013] The mounting base possesses elastic deformation potential energy.

[0014] During use, the elastic element is always in a compressed state.

[0015] The mounting base is made of angle steel and includes a first wall surface that connects to the vehicle and a second wall surface that connects to the roller bracket; the first wall surface is fastened to the rear fork of the vehicle.

[0016] A clearance is provided between the first wall surface and the roller to prevent collisions.

[0017] The beneficial effects of this utility model are as follows:

[0018] This application solves the problems of loose and detached chains in electric bicycles, as well as the inconvenience of manually adjusting chain tension. It automatically adjusts to the optimal tension, ensuring stable operation of the electric bicycle.

[0019] This application designs the spring's preload and installation position based on existing chain and installation methods on the market. After installation, no manual intervention is required; it can always maintain contact with the chain and adjust the tension. Because of the use of an elastic element, the elastic restoring force of the element presses against the tension wheel, thus automatically providing appropriate tension according to the chain's slack, achieving a floating adjustment function.

[0020] The chain adjuster provided in this application has a reasonable structural design, can be installed at the end of the rear fork of a vehicle, does not affect the installation and operation of other components, and is easy to seamlessly connect with the existing chain system of electric bicycles.

[0021] Manufactured using high-quality materials and advanced processes, the tensioner ensures stable operation even in harsh riding conditions. Attached Figure Description

[0022] Figure 1 This is the main view of this application.

[0023] Figure 2 This is a side view of the present application, showing the elastic element and the tensioner wheel mounted coaxially.

[0024] Figure 3 This is a side view of the present application, in which the elastic element is located between the mounting base and the roller bracket.

[0025] The components include: 1. Mounting base; 2. Roller bracket; 3. Tensioner wheel; 4. Pin; 5. Elastic element; 6. Anti-collision gap; 7. Mounting screw; 8. Fixing screw; 9. Pin;

[0026] 101. The first wall; 102. The second wall. Detailed Implementation

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown, the self-tensioning chain adjuster of this embodiment includes a mounting base 1 that connects to an external vehicle, a roller bracket 2 mounted on the mounting base 1, and a tensioning wheel 3 rotatably connected to the roller bracket 2. The tensioning wheel 3 is constantly kept in a state of downward pressure or upward pressure against the vehicle chain.

[0029] The relative position between the tensioner wheel 3 and the mounting base 1 can be adjusted autonomously by floating.

[0030] The outer circumference of the tension wheel 3 is concave to form a limiting space to accommodate the chain.

[0031] A pin 4 passes through the roller bracket 2, and the roller is sleeved on the pin 4; an elastic element 5 is provided between the roller and the pin 4 and is sleeved on the pin 4.

[0032] The elastic element 5 provides the roller with a radial elastic restoring force in the vertical direction.

[0033] An elastic element 5 is provided between the mounting base 1 and the roller bracket 2. The roller bracket 2 is based on the mounting base 1 and is pushed and tightened by the elastic restoring force in the vertical direction, and the tensioning wheel 3 abuts against the chain.

[0034] Mounting base 1 possesses elastic deformation potential energy.

[0035] During use, the elastic element 5 is always in a compressed state.

[0036] Mounting base 1 is made of angle steel. Mounting base 1 includes a first wall surface 101 connected to the vehicle and a second wall surface 102 connected to the roller bracket 2. The first wall surface 101 is fastened to the rear fork of the vehicle.

[0037] A collision prevention gap 6 is reserved between the first wall surface 101 and the roller.

[0038] The specific structure of this application is as follows:

[0039] Example 1:

[0040] like Figure 1 and Figure 2 As shown, the chain adjuster includes a mounting base 1. The first wall 101 of the mounting base 1 is connected to the rear fork of the vehicle by mounting screws 7. The second wall 102 of the mounting base 1 serves as the mounting base for the roller bracket 2 and is fastened to the roller bracket 2 by connecting screws.

[0041] The roller bracket 2 is a U-shaped, one-piece molded component. A tensioning wheel is clamped in the middle of the roller bracket 2, and a pin 4 passes through the roller bracket 2 and the tensioning wheel for positioning. An elastic element 5 is also fitted onto the pin 4 as the power source for floating. The elastic element 5 is located between the inner wall of the tensioning wheel and the outer wall of the pin 4, and can be a disc spring, wave spring, etc. In this structure, the elastic restoring force provided by the elastic element 5 acts between the pin 4 and the inner wall of the tensioning wheel, and the relative positions of the mounting base 1 and the roller bracket 2 remain unchanged.

[0042] Example 2:

[0043] The difference from Embodiment 1 is that the elastic deformation position in this application is changed to between the mounting base 1 and the roller bracket 2.

[0044] like Figure 3 As shown, the second wall 102 of the mounting base 1 and the roller bracket 2 are connected by a pin 9, and an elastic element 5, such as a compression spring or disc spring, is threaded through the pin 9. The advantage of this design is that the relative positional relationship between the tension wheel and the roller bracket 2 is more stable, the entire roller bracket 2 is a floating structure, and the overall strength is higher.

[0045] Example 3:

[0046] The difference from Embodiment 1 or Embodiment 2 is that the elastic deformation potential energy of this application comes from the mounting base 1.

[0047] Mounting base 1 is made of angle steel and has a first wall surface 101 and a second wall surface 102. The connection between the first wall surface 101 and the second wall surface 102 is rounded, and the thickness of the second wall surface 102 is made slightly thinner, so that the second wall surface 102 and the rounded corner can have a certain elastic deformation capacity. This elastic deformation capacity is used to press the tensioner wheel against the chain.

[0048] As a further optimization, the limiting space on the tensioner pulley uses an arc groove, making the contact surface between the tensioner pulley and the chain an arc surface. In this way, even if the tensioner pulley tilts slightly due to the elastic deformation of the mounting base 1 itself, it will not affect the tensioning effect of the tensioner pulley on the chain.

[0049] Example 4:

[0050] The chain adjuster in this application is typically installed above the chain, with the tensioner pressing downwards onto the chain. Alternatively, the tensioner can also press the chain upwards. For example, when the chain adjuster is installed in the middle of a loop chain, the tensioner can be installed either downwards onto the lower chain or upwards against the chain; when the chain adjuster is installed below the loop chain, the tensioner presses upwards against the chain.

[0051] Considering ease of installation and long-term reliability, in this embodiment, it is preferable to install the chain adjuster above the ring chain and press down the upper chain.

[0052] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A self-tensioning chain adjuster, characterized in that: It includes a mounting base (1) for connecting to external vehicles, and a roller bracket (2) mounted on the mounting base (1). A tension wheel (3) is rotatably connected to the roller bracket (2). The tension wheel (3) is always kept in a state of pressing down or lifting up against the vehicle chain. The relative position between the tensioning wheel (3) and the mounting base (1) can be adjusted by autonomous floating.

2. The self-tensioning chain adjuster as described in claim 1, characterized in that: The outer circular surface of the tension wheel (3) is concave to form a limiting space to accommodate the chain.

3. The self-tensioning chain adjuster as described in claim 1, characterized in that: A pin (4) passes through the roller bracket (2), and the roller is sleeved on the pin (4); an elastic element (5) is provided between the roller and the pin (4) and sleeved on the pin (4).

4. The self-tensioning chain adjuster as described in claim 3, characterized in that: The elastic element (5) provides the roller with a radial elastic restoring force in the vertical direction.

5. The self-tensioning chain adjuster as described in claim 1, characterized in that: An elastic element (5) is provided between the mounting base (1) and the roller bracket (2). The roller bracket (2) is pushed and tightened by the elastic restoring force in the vertical direction with the mounting base (1) as the reference, and the tensioning wheel (3) abuts against the chain.

6. The self-tensioning chain adjuster as described in claim 1, characterized in that: The mounting base (1) has elastic deformation potential energy.

7. The self-tensioning chain adjuster as described in any one of claims 1-6, characterized in that: During use, the elastic element (5) is always in a compressed state.

8. The self-tensioning chain adjuster as described in claim 1, characterized in that: The mounting base (1) is made of angle steel. The mounting base (1) includes a first wall surface (101) connected to the vehicle and a second wall surface (102) connected to the roller bracket (2). The first wall surface (101) is fastened to the rear fork of the vehicle.

9. The self-tensioning chain adjuster as described in claim 8, characterized in that: A collision prevention gap (6) is reserved between the first wall surface (101) and the roller.

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