Length-adjustable coupling

Abstract

The utility model discloses a length adjustable shaft coupling relates to mechanical engineering technical field, including the fastening assembly of outer sleeve and outer sleeve surface, the surface of outer sleeve is provided with round hole, and the round hole is slidably connected with connecting rod, and the bottom of connecting rod is provided with length adjusting assembly, length adjusting assembly includes the round gear fixed in the bottom of connecting rod, and the round gear can be engaged with first rack and second rack, and the round gear rotation can make first rack and second rack reverse motion, and the end of first rack and second rack all is provided with extension block, through the rotation knob can drive the round gear rotation, and then drive first rack and second rack reverse motion, realize the change of extension block between distance, can adapt to the relative position change of shaft system between different equipment because of installation error, the thermal expansion deformation or mechanical vibration when running, effectively cope through the length adjusting function of this shaft coupling, greatly expands the application scene of shaft coupling.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically to an adjustable length coupling. Background Technology

[0002] Adjustable-length couplings are widely used in the machinery manufacturing industry because they can flexibly adjust the connection length and compensate for shaft misalignment. In automated production lines, there may be slight deviations in the installation positions of different equipment, and the equipment may also change position due to factors such as vibration during operation. Adjustable-length couplings can effectively compensate for these deviations, ensure stable power transmission from the motor to each processing component, and maintain the normal operation of the production line.

[0003] Existing couplings typically employ gear and rack drives, hydraulic adjustment systems, etc., and often use rigid connections or direct assembly of elastic elements. For example, flange couplings connect two half-couplings only by bolts.

[0004] Existing couplings have a fixed length and cannot be adjusted. However, in actual use, it is necessary to adjust the connection length of the coupling according to the specific needs of the site. To address this issue, an adjustable-length coupling is proposed. Utility Model Content

[0005] In order to solve the above problems, the purpose of this utility model is to provide a length-adjustable coupling.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: it includes an outer tube and a fastening assembly fixed to the surface of the outer tube. The surface of the outer tube is provided with a circular hole, and a connecting rod is slidably connected in the circular hole. A length adjustment assembly is provided at the bottom of the connecting rod.

[0007] The length adjustment assembly includes a circular gear fixed to the bottom of the connecting rod. The circular gear can mesh with rack number one and rack number two. Rotation of the circular gear can cause rack number one and rack number two to move in opposite directions. A knob is provided at the top of the connecting rod, and extension blocks are provided at the ends of rack number one and rack number two.

[0008] Preferably, the fastening assembly includes a fixing block fixed to the surface of the outer sleeve. An L-shaped fixing frame is provided on one side of the fixing block. A circular hole is opened in the center of one side of the fixing block. A hydraulic chamber is provided in the circular hole. The input end of the hydraulic chamber has a connecting rod that passes through the L-shaped fixing frame and is rotatably connected to the hydraulic chamber. A turntable is provided at one end of the connecting rod, and a sliding plate is provided at the other end of the connecting rod that can be slidably connected to the hydraulic chamber.

[0009] Preferably, the output end of the hydraulic chamber is provided with two U-shaped channels, and push rods are provided at the ends of the two U-shaped channels. A second oil tank is provided at the junction of the push rods and the U-shaped channels, and a movable disk located in the second oil tank is provided at one end of the push rods.

[0010] Preferably, a sealed bearing is provided at the connection between the connecting rod and the hydraulic chamber.

[0011] Preferably, the extension block can be slidably connected to the inner wall of the outer sleeve.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the circular gear can be driven to rotate by rotating the knob, which in turn drives the first rack and the second rack to move in opposite directions, thereby changing the distance between the extension blocks. It can quickly respond to different requirements of the coupling length under actual working conditions, improve the efficiency of equipment installation and debugging, and can continuously adjust the length within a certain range. It can adapt to the changes in the relative position of the shaft system caused by installation errors, thermal expansion deformation during operation, or mechanical vibration between different equipment. Whether it is the fine adjustment of equipment layout in automated production lines or the shaft offset compensation of wind turbines under complex working conditions, the length adjustment function of this coupling can effectively cope with these issues, greatly expanding the application scenarios of the coupling. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the length adjustment component of this utility model;

[0016] Figure 3 This is a schematic diagram of the fastening component of this utility model;

[0017] Figure 4 This is a cross-sectional view of the fastening assembly of this utility model;

[0018] In the diagram: 1. Outer tube; 101. Connecting rod; 102. Circular gear; 103. Rack No. 1; 104. Rack No. 2; 105. Extension block; 106. Knob; 2. Fastening assembly; 201. Fixing block; 202. Turntable; 203. Connecting rod; 204. Hydraulic chamber; 205. Sliding disc; 206. U-shaped channel; 207. Push rod; 208. No. 2 oil tank; 209. L-shaped fixing frame. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Figures 1-4 As shown, this utility model provides a length adjustable coupling, characterized in that: it includes an outer tube 1 and a fastening component 2 fixed to the surface of the outer tube 1, the surface of the outer tube 1 is provided with a circular hole, a connecting rod 101 is slidably connected in the circular hole, and a length adjustment component is provided at the bottom of the connecting rod 101;

[0021] The length adjustment assembly includes a circular gear 102 fixed to the bottom of the connecting rod 101. The circular gear 102 can mesh with rack 103 and rack 104. Rotation of the circular gear 102 causes rack 103 and rack 104 to move in opposite directions. A knob 106 is provided at the top of the connecting rod 101, and extension blocks 105 are provided at the ends of rack 103 and rack 104. When the length of the coupling needs to be adjusted, the operator rotates the knob 106 by hand. The knob 106 engages with the connecting rod. Since 101 is fixedly connected, rotating the knob 106 will cause the connecting rod 101 to rotate synchronously. Because a circular gear 102 is fixed to the bottom of the connecting rod 101, the circular gear 102 rotates along with the connecting rod 101. The circular gear 102 meshes with both rack 103 and rack 104. When the circular gear 102 rotates clockwise or counterclockwise, it converts its rotational motion into linear motion, thereby driving rack 103 and rack 104 to move in the opposite direction. The extension block 105 at the end of 04 moves along with the rack during rack movement. When rack 103 and rack 104 move in opposite directions, the distance between the two extension blocks 105 changes, thereby adjusting the overall length of the coupling. After adjustment, the connecting rod 101 in the new position can be fixed to the outer sleeve 1 by fastening component 2 to prevent the length of the coupling from changing during operation, ensuring its stability and reliability. The operator rotates the turntable 202, which drives the sliding mechanism via connecting rod 203. The sliding disc 205 slides downward in the hydraulic chamber 204. The downward movement of the sliding disc 205 compresses the hydraulic oil in the hydraulic chamber 204, increasing its pressure. The high-pressure hydraulic oil flows to the second oil tank 208 through the U-shaped channel 206. The design of the U-shaped channel 206 ensures that the hydraulic oil can be evenly transmitted to the second oil tanks 208 on both sides. The hydraulic oil entering the second oil tank 208 pushes the moving disc, causing the push rod 207 to move outward. The push rods 207 on both sides move outward at the same time, tightly clamping the connecting rod 101, thereby locking the length of the coupling.In the adjustable-length coupling, the sealed bearing at the connection between the connecting rod 203 and the hydraulic chamber 204 plays a crucial role. When the operator rotates the turntable 202 to rotate the connecting rod 203, the sealed bearing allows the connecting rod 203 to rotate smoothly, reducing the frictional resistance at its connection with the hydraulic chamber 204 and ensuring efficient power transmission. Simultaneously, the sealing structure of the sealed bearing effectively prevents hydraulic oil leakage from the hydraulic chamber 204. When the sliding plate 205 moves downwards, increasing the oil pressure in the hydraulic chamber 204, without the sealed bearing, hydraulic oil might seep out from the gap between the connecting rod 203 and the hydraulic chamber 204, preventing effective transmission of oil pressure to the U-shaped channel 206 and the second oil tank 204. 8. This, in turn, affects the normal clamping action of the push rod 207. The presence of the sealed bearing ensures the integrity and sealing of the hydraulic system, allowing the hydraulic oil to flow along a predetermined path, driving the moving disc and push rod 207 to complete the clamping operation of the coupling. The extension block 105 can slide on the inner wall of the outer sleeve 1. This structural design provides guidance and support for the length adjustment of the coupling. The inner wall of the outer sleeve 1 provides constraint and guidance for the sliding of the extension block 105, ensuring that the extension block 105 can only move in a specific direction, preventing it from shifting or shaking during movement, thereby ensuring the linear motion accuracy of rack 103 and rack 104, enabling the coupling to be accurately adjusted to the required length.

[0022] By adopting the above technical solution.

[0023] Obviously, those skilled in the art of mechanical engineering can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A length-adjustable coupling, characterized in that: It includes an outer tube (1) and a fastening assembly (2) fixed to the surface of the outer tube (1). The surface of the outer tube (1) is provided with a circular hole, and a connecting rod (101) is slidably connected in the circular hole. A length adjustment assembly is provided at the bottom of the connecting rod (101). The length adjustment assembly includes a circular gear (102) fixed to the bottom of the connecting rod (101). The circular gear (102) can mesh with racks 1 (103) and 2 (104). Rotation of the circular gear (102) can cause racks 1 (103) and 2 (104) to move in opposite directions. A knob (106) is provided at the top of the connecting rod (101). Extension blocks (105) are provided at the ends of racks 1 (103) and 2 (104).

2. The length-adjustable coupling as described in claim 1, characterized in that, The fastening assembly (2) includes a fixing block (201) fixed to the surface of the outer sleeve (1). An L-shaped fixing frame (209) is provided on one side of the fixing block (201). A circular hole is provided in the center of one side of the fixing block (201). A hydraulic chamber (204) is provided in the circular hole. A connecting rod (203) is provided at the input end of the hydraulic chamber (204) and is rotatably connected to the L-shaped fixing frame (209). A turntable (202) is provided at one end of the connecting rod (203). A sliding disc (205) is provided at the other end of the connecting rod (203) and can be slidably connected in the hydraulic chamber (204).

3. The length-adjustable coupling as described in claim 2, characterized in that, The output end of the hydraulic chamber (204) is provided with two U-shaped channels (206), and push rods (207) are provided at the ends of the two U-shaped channels (206). A second oil tank (208) is provided at the junction of the push rod (207) and the U-shaped channel (206). A movable disk located in the second oil tank (208) is provided at one end of the push rod (207).

4. The length-adjustable coupling as described in claim 2, characterized in that, A sealed bearing is provided at the connection between the connecting rod (203) and the hydraulic chamber (204).

5. The length-adjustable coupling as described in claim 3, characterized in that, The extension block (105) can be slidably connected to the inner wall of the outer sleeve (1).

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