Chain transmission mechanism of electric bicycle

Abstract

The utility model relates to the technical field of chain transmission of electric bicycles, and discloses a chain transmission mechanism of an electric bicycle, which comprises a rear wheel and a fixing frame, pedals are arranged inside the fixing frame, a front chain wheel is arranged outside the fixing frame, a rear chain wheel is arranged outside the rear wheel, and the rear wheel is provided with a chain wheel. A chain is installed outside the front chain wheel in a transmission mode, a chain adjusting mechanism is arranged outside the fixing frame, a lubricating mechanism is arranged outside the fixing frame, the rotating column drives the auxiliary chain wheel to change the position, so that the chain becomes loose, the chain can be detached, and the chain is convenient to replace and maintain. The clamping column moves downwards to be in contact with the auxiliary chain wheel to lock the auxiliary chain wheel, so that installation is more convenient when the chain is replaced, the brush roller slides out of the fixing block C to be in contact with the chain, lubricating liquid is brushed outside the chain through the brush roller to conduct lubricating maintenance, the chain is not prone to breakage, and the service life of the chain is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of chain transmission of electric bicycles, in particular to a chain transmission mechanism of an electric bicycle. Background Art

[0002] The transmission devices of existing electric bicycles are all chain-type transmissions. For example, in an electric bicycle equipped with a rear-drive hub motor, the central shaft and the rear-drive hub motor are connected through a chain (and sprocket) transmission, the two ends of the central shaft are connected to cranks, and the ends of the cranks are connected to pedals.

[0003] According to the description of the electric bicycle chain transmission mechanism and electric bicycle (authorization announcement number: CN217864566 U) disclosed on the patent website, "The utility model discloses an electric bicycle chain transmission mechanism, which cancels the original flywheel of the rear wheel, and adopts an integrated arrangement of the rear sprocket and the output end of the rear wheel motor, and at the same time adds a middle shaft flywheel connected to the five-way middle shaft at the center of the front sprocket. Compared with the existing technology, under the premise of unchanged transmission function effect, the process of pre-installing the flywheel on the rear wheel in advance is cancelled, and the production line working hours are reduced, thereby solving the problem of the existing electric vehicle sprocket transmission mechanism that the flywheel needs to be pre-installed on the rear wheel motor in advance, thereby increasing the workload of the operator and extending the operation cycle. The utility model also proposes an electric bicycle including the above-mentioned electric bicycle chain transmission mechanism, the electric bicycle has a normal transmission function, and at the same time, due to the adoption of the above-mentioned electric bicycle chain transmission mechanism, the electric bicycle is simpler and more time-saving in assembly operation compared with the existing technology."

[0004] In view of the above description, the applicant believes that there are the following problems:

[0005] During use, the utility model cancels the original limiting notch of the five-way middle shaft, and also cancels the related limiting pins, screws and other fasteners. By adding a middle shaft flywheel and welding it to the five-way middle shaft at the center of the front sprocket, the front sprocket is connected and fixed to the middle shaft flywheel by threads. However, the chain may break due to excessive dryness after being used for a long time, which affects its use. Secondly, when replacing and installing the chain, the rear sprocket needs to be disassembled to complete the installation, which is rather cumbersome. If it is directly forced to be installed, it is rather difficult and prone to breakage, which may also hurt people's hands. Therefore, it is necessary to improve the chain transmission mechanism of an electric bicycle to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a chain transmission mechanism for an electric bicycle to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a chain transmission mechanism of an electric bicycle, comprising a rear wheel and a fixed frame, wherein a pedal is arranged inside the fixed frame, a front sprocket is arranged outside the fixed frame, a rear sprocket is arranged outside the rear wheel, a chain is installed on the external transmission of the front sprocket, a chain adjustment mechanism is arranged outside the fixed frame, and a lubrication mechanism is arranged outside the fixed frame.

[0008] The chain adjustment mechanism comprises a chain changing assembly and a clamping assembly. The chain changing assembly is arranged outside the fixing frame, and the clamping assembly is arranged outside the fixing frame.

[0009] Preferably, the chain changing assembly includes a fixed rod, which is fixedly mounted on the outside of a fixed frame, a rotating rod is rotatably mounted on the outside of the fixed rod, a fixed block A is fixedly mounted on the front of the fixed frame, a rotating column is rotatably mounted on the inside of the rotating rod, an auxiliary sprocket is fixedly mounted on the back of the rotating column, a worm wheel is fixedly mounted on the front of the rotating rod, the rear sprocket is installed with a chain transmission, a worm is meshed on the outside of the worm wheel, and rotating the worm wheel causes the worm wheel to rotate, thereby driving the rotating rod to rotate outside the fixed rod, so that the rotating column drives the auxiliary sprocket to change position.

[0010] Preferably, the worm wheel is arranged inside the fixed block A, the worm is rotatably installed inside the fixed block A, and the auxiliary sprocket is installed with the chain transmission to assist in tightening and loosening the chain.

[0011] Preferably, the clamping assembly includes a fixed block B, which is fixedly installed on the outside of the fixed frame, a rectangular block is fixedly installed on the bottom of the fixed block B, a slider is slidably installed inside the rectangular block, a clamping column is fixedly installed inside the slider, a protrusion A is fixedly installed on the front of the slider, a protrusion B is fixedly installed on the front of the rectangular block, a spring A is fixedly installed on the top of the slider, a clamping block A is fixedly installed on the top of the protrusion A, two clamping blocks B are slidably installed inside the protrusion B, a sliding column is fixedly installed on the outside of the clamping block B, and a spring B is fixedly installed on the end of the clamping block B close to the sliding column so that the clamping block A contacts the clamping block B.

[0012] Preferably, one end of the spring B away from the block B is fixedly mounted on the protrusion B, the sliding column is slidably mounted inside the protrusion B, and one end of the spring A away from the slider is fixedly mounted on the rectangular block. The clamping column contacts the auxiliary sprocket to lock the auxiliary sprocket so that it no longer rotates, making it easier to install when replacing the chain.

[0013] Preferably, the lubrication mechanism includes a fixed block C, which is fixedly installed on the top of the rear wheel, a storage block is slidably installed inside the fixed block C, a press column is fixedly installed on the top of the storage block, a feed port is fixedly installed on the top of the storage block, a boss is fixedly installed on the bottom of the storage block, a brush roller is rotatably installed inside the boss, and two springs C are fixedly installed on the bottom of the storage block to enable the storage block to move upward and disengage from the chain.

[0014] Preferably, one end of the spring C away from the storage block is fixedly mounted on the fixed block C, and the brush roller is in contact with the chain, so that the lubricating liquid is brushed onto the outside of the chain through the brush roller for lubrication maintenance.

[0015] Compared with the prior art, the utility model provides a chain transmission mechanism for an electric bicycle, which has the following beneficial effects:

[0016] 1. The chain transmission mechanism of the electric bicycle rotates the worm to rotate the worm wheel, driving the rotating rod to rotate outside the fixed rod, so that the rotating column drives the auxiliary sprocket to change position, making the chain loose, and the chain can be disassembled, making chain replacement and maintenance more convenient, pulling the two blocks B so that the blocks A and B are no longer in contact and disengage, so that the slider slides down under the action of the spring A, so that the column moves down and contacts the auxiliary sprocket to lock the auxiliary sprocket, and no longer rotates, making it more convenient to install when replacing the chain.

[0017] 2. The chain transmission mechanism of the electric bicycle is configured such that the storage block is slidably installed inside the fixed block C by pressing the column downward, so that the brush roller slides out of the fixed block C and contacts the chain, so that the brush roller is rotatably installed inside the boss, so that the lubricating liquid is brushed onto the outside of the chain through the brush roller for lubrication and maintenance, making the chain less likely to break and increasing the service life of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0019] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the chain adjustment mechanism structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the chain changing assembly of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0023] Figure 5 For this utility model Figure 4 Schematic diagram of the structure at A in the middle;

[0024] Figure 6 This is a schematic diagram of the structure of the lubrication mechanism of the utility model.

[0025] In the figure: 1, rear wheel; 2, fixed frame; 3, pedal; 4, front sprocket; 5, rear sprocket; 6, chain; 7, chain adjustment mechanism; 71, chain changing assembly; 711, fixed rod; 712, rotating rod; 713, fixed block A; 714, rotating column; 715, auxiliary sprocket; 716, worm wheel; 717, worm; 72, clamping assembly; 721, fixed block B; 722, rectangular block; 723, slider; 724, clamping column; 725, convex block A; 726, convex block B; 727, spring A; 728, clamping block A; 729, clamping block B; 7210, sliding column; 7211, spring B; 8, lubrication mechanism; 81, fixed block C; 82, storage block; 83, pressing column; 84, feed port; 85, boss; 86, spring C; 87, brush roller. DETAILED DESCRIPTION

[0026] 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.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1:

[0028] See also Figure 1-5The utility model provides a technical solution: a chain transmission mechanism of an electric bicycle, comprising a rear wheel 1 and a fixed frame 2, a pedal 3 is arranged inside the fixed frame 2, a front sprocket 4 is arranged outside the fixed frame 2, a rear sprocket 5 is arranged outside the rear wheel 1, a chain 6 is installed on the external transmission of the front sprocket 4, a chain adjustment mechanism 7 is arranged outside the fixed frame 2, and a lubrication mechanism 8 is arranged outside the fixed frame 2.

[0029] The chain adjusting mechanism 7 comprises a chain changing assembly 71 and a clamping assembly 72 . The chain changing assembly 71 is arranged outside the fixing frame 2 , and the clamping assembly 72 is arranged outside the fixing frame 2 .

[0030] Furthermore, the chain changing assembly 71 includes a fixed rod 711, which is fixedly mounted on the outside of the fixed frame 2, a rotating rod 712 is rotatably mounted on the outside of the fixed rod 711, a fixed block A713 is fixedly mounted on the front of the fixed frame 2, a rotating column 714 is rotatably mounted on the inside of the rotating rod 712, an auxiliary sprocket 715 is fixedly mounted on the back of the rotating column 714, a worm wheel 716 is fixedly mounted on the front of the rotating rod 712, the rear sprocket 5 is transmission-mounted with the chain 6, a worm 717 is meshed on the outside of the worm wheel 716, and rotating the worm 717 causes the worm wheel 716 to rotate, thereby driving the rotating rod 712 to rotate outside the fixed rod 711, so that the rotating column 714 drives the auxiliary sprocket 715 to change its position.

[0031] Furthermore, the worm wheel 716 is arranged inside the fixed block A713, the worm 717 is rotatably installed inside the fixed block A713, and the auxiliary sprocket 715 is installed in transmission with the chain 6 to assist in tightening and loosening the chain 6.

[0032] Furthermore, the clamping assembly 72 includes a fixed block B721, which is fixedly installed on the outside of the fixed frame 2, a rectangular block 722 is fixedly installed on the bottom of the fixed block B721, a slider 723 is slidably installed inside the rectangular block 722, a clamping column 724 is fixedly installed inside the slider 723, a protrusion A725 is fixedly installed on the front of the slider 723, a protrusion B726 is fixedly installed on the front of the rectangular block 722, a spring A727 is fixedly installed on the top of the slider 723, a clamping block A728 is fixedly installed on the top of the protrusion A725, two clamping blocks B729 are slidably installed inside the protrusion B726, a sliding column 7210 is fixedly installed on the outside of the clamping block B729, and a spring B7211 is fixedly installed on one end of the clamping block B729 close to the sliding column 7210, so that the clamping block A728 contacts the clamping block B729.

[0033] Furthermore, one end of the spring B7211 away from the blocking block B729 is fixedly installed on the protrusion B726, the sliding column 7210 is slidably installed inside the protrusion B726, and one end of the spring A727 away from the sliding block 723 is fixedly installed on the rectangular block 722. The blocking column 724 contacts the auxiliary sprocket 715, locking the auxiliary sprocket 715 so that it no longer rotates, making it easier to install when replacing the chain 6. Embodiment 2:

[0034] See also Figure 6 , and combined with Example 1, it is further obtained that the lubrication mechanism 8 includes a fixed block C81, the fixed block C81 is fixedly installed on the top of the rear wheel 1, a storage block 82 is slidably installed inside the fixed block C81, a pressing column 83 is fixedly installed on the top of the storage block 82, a feed port 84 is fixedly installed on the top of the storage block 82, a boss 85 is fixedly installed on the bottom of the storage block 82, a brush roller 87 is rotatably installed inside the boss 85, and two springs C86 are fixedly installed on the bottom of the storage block 82, so that the storage block 82 moves up and disengages from the chain 6.

[0035] Furthermore, one end of the spring C86 away from the storage block 82 is fixedly mounted on the fixed block C81, and the brush roller 87 is in contact with the chain 6, so that the lubricating liquid is brushed onto the outside of the chain 6 through the brush roller 87 for lubrication maintenance.

[0036] In actual operation, when the device is used, the worm 717 is rotated to rotate the worm wheel 716, which drives the rotating rod 712 to rotate outside the fixed rod 711, so that the rotating column 714 drives the auxiliary sprocket 715 to change its position, so that the chain 6 becomes loose, and the chain 6 can be disassembled, so that the replacement of the chain 6 and maintenance are more convenient, and the two blocks B729 are pulled so that the blocks A728 and B729 are no longer in contact and disengage, so that the slider 723 slides down under the action of the spring A727. The clamping column 724 moves downward and contacts the auxiliary sprocket 715 to lock the auxiliary sprocket 715, so that it no longer rotates, making it more convenient to install when replacing the chain 6. The pressing column 83 is pressed downward to make the storage block 82 slide and be installed inside the fixed block C81, so that the brush roller 87 slides out of the fixed block C81 and contacts the chain 6, so that the brush roller 87 is rotatably installed inside the boss 85, so that the lubricating liquid is brushed on the outside of the chain 6 through the brush roller 87 for lubrication and maintenance, making the chain 6 less likely to break and increasing the service life of the chain 6.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A chain transmission mechanism for an electric bicycle, comprising a rear wheel (1) and a fixing frame (2), characterized in that: A pedal (3) is arranged inside the fixing frame (2), a front sprocket (4) is arranged outside the fixing frame (2), a rear sprocket (5) is arranged outside the rear wheel (1), a chain (6) is installed on the external transmission of the front sprocket (4), a chain adjustment mechanism (7) is arranged outside the fixing frame (2), and a lubrication mechanism (8) is arranged outside the fixing frame (2); The chain adjustment mechanism (7) comprises a chain changing assembly (71) and a clamping assembly (72), wherein the chain changing assembly (71) is arranged outside the fixing frame (2), and the clamping assembly (72) is arranged outside the fixing frame (2); The chain changing assembly (71) comprises a fixing rod (711), the fixing rod (711) being fixedly mounted on the outside of a fixing frame (2), a rotating rod (712) being rotatably mounted on the outside of the fixing rod (711), a fixing block A (713) being fixedly mounted on the front of the fixing frame (2), a rotating column (714) being rotatably mounted on the inside of the rotating rod (712), an auxiliary sprocket (715) being fixedly mounted on the back of the rotating column (714), a worm wheel (716) being fixedly mounted on the front of the rotating rod (712), the rear sprocket (5) being transmission-mounted with the chain (6), and a worm (717) being meshed with the outside of the worm wheel (716); The clamping assembly (72) comprises a fixing block B (721), wherein the fixing block B (721) is fixedly mounted on the outside of the fixing frame (2), a rectangular block (722) is fixedly mounted on the bottom of the fixing block B (721), a slider (723) is slidably mounted inside the rectangular block (722), a clamping column (724) is fixedly mounted inside the slider (723), a protrusion A (725) is fixedly mounted on the front of the slider (723), and the rectangular block (722) is fixedly mounted on the inside of the slider (723). A protrusion B (726) is fixedly installed on the front side, a spring A (727) is fixedly installed on the top of the slider (723), a clamping block A (728) is fixedly installed on the top of the protrusion A (725), two clamping blocks B (729) are slidably installed inside the protrusion B (726), a sliding column (7210) is fixedly installed outside the clamping block B (729), and a spring B (7211) is fixedly installed on one end of the clamping block B (729) close to the sliding column (7210).

2. The chain transmission mechanism of an electric bicycle according to claim 1, characterized in that: The worm wheel (716) is arranged inside the fixed block A (713), the worm (717) is rotatably mounted inside the fixed block A (713), and the auxiliary sprocket (715) is transmission-mounted with the chain (6).

3. The chain transmission mechanism of an electric bicycle according to claim 1, characterized in that: One end of the spring B (7211) away from the clamping block B (729) is fixedly mounted on the protrusion B (726), the sliding column (7210) is slidably mounted inside the protrusion B (726), one end of the spring A (727) away from the slider (723) is fixedly mounted on the rectangular block (722), and the clamping column (724) is in contact with the auxiliary sprocket (715).

4. The chain transmission mechanism of an electric bicycle according to claim 1, characterized in that: The lubrication mechanism (8) comprises a fixed block C (81), the fixed block C (81) being fixedly mounted on the top of the rear wheel (1), a storage block (82) being slidably mounted inside the fixed block C (81), a pressing column (83) being fixedly mounted on the top of the storage block (82), a feed port (84) being fixedly mounted on the top of the storage block (82), a boss (85) being fixedly mounted on the bottom of the storage block (82), a brush roller (87) being rotatably mounted inside the boss (85), and two springs C (86) being fixedly mounted on the bottom of the storage block (82).

5. The chain transmission mechanism of an electric bicycle according to claim 4, characterized in that: One end of the spring C (86) away from the storage block (82) is fixedly mounted on the fixed block C (81), and the brush roller (87) is in contact with the chain (6).

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