Anti-fatigue clamping type hedge shear crankshaft

Abstract

The utility model relates to the technical field of clamping type crankshafts, and discloses an anti-fatigue clamping type hedge shear crankshaft, which is characterized in that the lower end of a shaft body is movably provided with a rotating shaft for rotation, the surfaces of the two ends of the rotating shaft are movably provided with bearings for rotation, and the side end of the rotating shaft is provided with a circular shaft for connection; by arranging the damping assembly composed of the damping block and the buffer spring on the surface of the circular shaft, vibration energy generated in the operation process of the shaft body can be effectively absorbed and consumed, the damping block initially buffers vibration through the damping characteristic, and then the buffer spring further reduces vibration transmitted to the eccentric shaft through elastic deformation; the vibration amplitude of the shaft body is greatly reduced, the anti-fatigue performance of the hedge shear crankshaft is remarkably improved, the three sets of damping assemblies are arranged, uniformly surround the surface of the damping block and are installed at one end of the eccentric shaft, vibration of the shaft body in all directions can be effectively restrained, the damping effect is more uniform and comprehensive, and the service life of the hedge shear crankshaft is prolonged. And the working performance of the hedge shear crankshaft is improved in all directions.

Description

Technical Field

[0001] This utility model relates to the field of snap-fit ​​crankshaft technology, specifically a fatigue-resistant snap-fit ​​hedge trimmer crankshaft. Background Technology

[0002] In garden pruning operations, hedge trimmers are a commonly used tool, and their performance directly affects work efficiency and pruning quality. The crankshaft, as a key component of hedge trimmers, is responsible for converting the rotational motion of the power source into the reciprocating motion of the blades to achieve the pruning of hedges.

[0003] Traditional hedge trimmer crankshafts face numerous problems during operation. First, at high speeds, the crankshaft vibrates strongly due to uneven torque output from the engine and the reaction force generated when the blades cut hedges. This vibration not only increases energy loss and reduces the power transmission efficiency of the hedge trimmer, but also causes severe shaking of the equipment, affecting the operator's grip comfort and operational accuracy. Long-term use may even lead to occupational musculoskeletal diseases in operators.

[0004] Secondly, frequent vibrations subject the crankshaft to alternating stress, which can easily lead to fatigue cracks at stress concentration points, resulting in crankshaft breakage. This significantly shortens the service life of hedge trimmers, increases maintenance costs and replacement frequency, and affects the continuity of gardening operations.

[0005] To address the aforementioned issues, we propose a fatigue-resistant snap-fit ​​hedge shear crankshaft. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a fatigue-resistant snap-fit ​​hedge trimmer crankshaft, which solves the aforementioned problems.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a fatigue-resistant snap-fit ​​hedge trimmer crankshaft, comprising a shaft body, a rotating shaft movably mounted at the lower end of the shaft body, rotating bearings movably mounted on both ends of the rotating shaft, a connecting round shaft at the side end of the rotating shaft, and eccentric shafts movably mounted on both ends of the round shaft, further comprising:

[0008] A vibration damping assembly is a structure mounted on the surface of a round shaft to dampen the shaft.

[0009] Preferably, the shock absorption assembly includes a damping block, a buffer spring, and a nut. A damping block for buffering is slidably installed on the surface of the circular shaft corresponding to both sides of the shaft body. A buffer spring for shock absorption is installed around the outer end of the damping block on the surface of the circular shaft. The other end of the buffer spring is fixedly connected to the eccentric shaft. The two ends of the circular shaft are provided with threads for installation through the surface of the eccentric shaft. The nut is threadedly connected to the two ends of the circular shaft.

[0010] Preferably, the damping components are provided in three sets, and all three sets of damping components surround the surface of the damping block.

[0011] Preferably, the three sets of the shock-absorbing components are installed at one end of the eccentric shaft.

[0012] Preferably, the two damping blocks are provided with a shaft groove matching the bearing at the center of the inner end, and the bearing is installed inside the shaft groove.

[0013] Preferably, a limiting block for limiting is provided on the side end of the shaft, the lower end of the limiting block is in contact with the round shaft, and a fixing post for fixing is installed at the center of the limiting block, with both ends of the fixing post penetrating the surface of the damping block and connected to fixing bolts.

[0014] Preferably, a second limiting block for fixing is provided at the other end of the shaft. The second limiting block and the limiting block are symmetrically arranged, and the limiting block and the limiting block are fitted to the surface of the shaft.

[0015] Compared with the prior art, this utility model provides a fatigue-resistant snap-fit ​​hedge trimmer crankshaft, which has the following beneficial effects:

[0016] 1. This fatigue-resistant snap-fit ​​hedge trimmer crankshaft effectively absorbs and dissipates vibration energy generated during operation by setting a damping component consisting of damping blocks and buffer springs on the surface of the round shaft. The damping blocks initially buffer vibrations with their damping characteristics, and the buffer springs further reduce the vibration transmitted to the eccentric shaft through elastic deformation, significantly reducing the vibration amplitude of the shaft and significantly improving the fatigue resistance of the hedge trimmer crankshaft, extending its service life. The damping component is set in three sets and evenly surrounds the surface of the damping blocks and is installed at one end of the eccentric shaft, so that the vibration of the shaft in all directions can be effectively suppressed, the damping effect is more uniform and comprehensive, and the working performance of the hedge trimmer crankshaft is improved in all aspects.

[0017] 2. This fatigue-resistant snap-fit ​​hedge trimmer crankshaft has a limiting block and a second limiting block respectively set on both sides of the shaft. The limiting block is connected to the damping block through a fixing column and a fixing bolt to limit the displacement of the shaft and ensure its positional stability during operation. The two are symmetrically set to further enhance the limiting effect on the shaft and ensure the reliability and stability of the entire hedge trimmer crankshaft during operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional view of the present invention;

[0020] Figure 3This is a schematic diagram of the internal structure of the damping block of this utility model.

[0021] In the diagram: 1. Shaft body; 2. Round shaft; 3. Eccentric shaft; 4. Rotating shaft; 5. Bearing; 6. Shaft groove; 7. Damping block; 8. Limiting block; 9. Fixing column; 10. Fixing bolt; 11. Second limiting block; 12. Buffer spring; 13. Nut; 14. Second round shaft; 15. Third round shaft. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 A fatigue-resistant snap-fit ​​hedge trimmer crankshaft includes a shaft body 1, a rotating shaft 4 movably mounted at the lower end of the shaft body 1, rotating bearings 5 ​​movably mounted on the surfaces of both ends of the rotating shaft 4, a round shaft 2 for connection at the side end of the rotating shaft 4, and an eccentric shaft 3 movably mounted on the surfaces of both ends of the round shaft 2 for rotation. It also includes a shock-absorbing assembly, mounted on the surface of the round shaft 2, for damping the shaft body 1. When the hedge trimmer is working, power is first transmitted to the shaft body 1, and the rotating shaft 4 movably mounted at the lower end of the shaft body 1 begins to rotate. The bearings 5 ​​movably mounted on the surfaces of both ends of the rotating shaft 4 allow the rotating shaft 4 to rotate smoothly, reducing frictional resistance and ensuring stable power transmission.

[0024] Furthermore, the damping assembly includes a damping block 7, a buffer spring 12, and a nut 13. The damping block 7 for buffering is slidably installed on the surface of the round shaft 2 corresponding to both sides of the shaft body 1. The buffer spring 12 for damping is installed around the outer end of the damping block 7 on the surface of the round shaft 2. The other end of the buffer spring 12 is fixedly connected to the eccentric shaft 3. The two ends of the round shaft 2 are provided with threads for installation through the surface of the eccentric shaft 3. The nut 13 is threadedly connected to the two ends of the round shaft 2. The damping block first buffers the vibration by means of its damping characteristics, and the buffer spring further reduces the vibration transmitted to the eccentric shaft through elastic deformation.

[0025] Furthermore, three sets of damping components are provided, all three sets of damping components are wrapped around the surface of the damping block 7, and are installed at one end of the eccentric shaft 3, so that the damping effect is more uniform and comprehensive.

[0026] Furthermore, three sets of damping components are installed at one end of the eccentric shaft 3. Since the three sets of damping components are installed at the same end, they will not affect the operation of the shaft.

[0027] Furthermore, the two damping blocks 7 have a shaft groove 6 at the center of their inner ends that matches the bearing 5. The bearing 5 is installed inside the shaft groove 6, and the lower end of the shaft 1 is installed inside the shaft groove 6, which ensures the stability of the rotation of the shaft 4.

[0028] Furthermore, a limiting block 8 for limiting is provided on the side end of the shaft 1. The lower end of the limiting block 8 is in contact with the round shaft 2. A fixing post 9 for fixing is installed at the center of the limiting block 8. The two ends of the fixing post 9 penetrate the surface of the damping block 7 and are connected to the fixing bolt 10. The side end of the limiting block 8 is in contact with the shaft 1 to limit the shaft 1. The lower end of the limiting block 8 is in contact with the round shaft 2.

[0029] Furthermore, a second limiting block 11 for fixing is provided at the other end of the shaft 1. The second limiting block 11 and the limiting block 8 are symmetrically arranged. The limiting block 8 and the second limiting block 11 are fitted to the surface of the shaft 1. The second limiting block 11 and the limiting block 8 are symmetrically arranged and are both fitted to the surface of the shaft 1, thus limiting the shaft 1 from both ends.

[0030] Structural Description: 1. Shaft: The shaft is the core load-bearing structure of the fatigue-resistant snap-fit ​​hedge trimmer crankshaft, responsible for receiving and transmitting power. Its shape and size are customized according to the overall design and power requirements of the hedge trimmer. A limit block mounting position is set on the side end, and a second limit block mounting position is set on one end. In conjunction with other components, it ensures the stability of the entire crankshaft system. The shaft is connected to the power source of the hedge trimmer through a specific installation method, becoming the key hub for power transmission and motion conversion.

[0031] 2. Round Shaft: The round shaft is a key component for connection and transmission. It is located on the side of the rotating shaft and is fixedly connected to the rotating shaft to realize the transmission of power. Both ends of the round shaft pass through the eccentric shaft and the surface is threaded for use with nuts for fixing. The round shaft is made of high-strength alloy steel, which has good strength and toughness and can withstand alternating loads during operation to ensure stable and reliable power transmission.

[0032] 3. Eccentric shaft: The eccentric shaft is installed at both ends of the round shaft. It has through holes that mate with the round shaft. It is movably connected to the round shaft through these through holes. The eccentric structure design of the eccentric shaft can convert the rotation of the round shaft to meet the different movement requirements of the hedge trimmer blades. The eccentric shaft is made of medium carbon steel or alloy steel. It is heat-treated to improve its strength and wear resistance, ensuring stable operation under complex working conditions.

[0033] 4. Rotary Shaft: The rotary shaft is movably installed at the center of the lower end of the shaft body and is a key component for realizing the rotational movement of the shaft body. Its two end surfaces are used to install bearings. With the support of the bearings, smooth rotation is achieved. The rotary shaft is made of high-quality steel, which has high precision and wear resistance, ensuring stability and reliability during rotation.

[0034] 5. Bearings: The bearings are installed on both ends of the shaft as rotating support components to reduce frictional resistance when the shaft rotates. Their inner diameter is tightly fitted with the outer diameter of the shaft, and their outer diameter is matched with the shaft groove on the damping block. The bearings are high-precision rolling bearings with good rotational accuracy and load-bearing capacity, ensuring that the shaft can rotate stably and efficiently.

[0035] 6. Shaft Groove: The shaft groove is located at the center of the inner end of the two damping blocks. Its shape and size match the outer diameter of the bearing and are used to install the bearing. The design of the shaft groove not only ensures the stability of the bearing installation, but also guides the vibration to be transmitted to the damping block, which facilitates vibration reduction.

[0036] 7. Damping Block: The damping block is circular and is installed in pairs on both sides of the shaft body corresponding to the center of the shaft. It can slide along the surface of the shaft. The damping block is made of a material with high elasticity and damping properties, such as specially formulated rubber. When the shaft vibrates, it absorbs part of the vibration energy first by virtue of its own damping properties, playing a preliminary buffering role. The surface of the damping block is also provided with mounting holes for fixing posts and fixing bolts for connection with the limit block.

[0037] 8. Limiting block: The limiting block is installed on the side of the shaft, and its lower end fits tightly with the round shaft. The center of the limiting block is provided with a mounting hole for installing a fixing post. It is connected to the damping block through the fixing post and fixing bolts to limit the displacement of the shaft within a certain range and ensure the stability of the shaft position during operation. The limiting block is made of high-strength material and has sufficient strength and rigidity to withstand the displacement force of the shaft.

[0038] 9. Fixing post: The fixing post is installed in the mounting hole at the center of the limiting block. Its two ends penetrate the surface of the damping block and are used in conjunction with the fixing bolt. The fixing post connects the limiting block and the damping block to ensure that the limiting block can effectively limit the displacement of the shaft. The fixing post is made of high-strength alloy steel, which has good strength and toughness.

[0039] 10. Fixing Bolts: The fixing bolts cooperate with the fixing columns, pass through the mounting holes on the surface of the damping block, and firmly fix the limit block to the damping block. The tightness of the fixing bolts directly affects the limiting effect of the limit block. By precisely controlling the tightening torque, the stability of the limit block during operation is ensured.

[0040] 11. Second limiting block: The second limiting block is installed at the other end of the shaft, symmetrically arranged with the limiting block, and both are in contact with the surface of the shaft. The second limiting block further enhances the limiting effect on the shaft, ensuring the reliability and stability of the entire hedge trimmer crankshaft during operation. Its structure and installation method are similar to the limiting block, and it is also made of high-strength material.

[0041] 12. Buffer spring: The buffer spring is mounted around the outer end of the damping block on the surface of the round shaft, and the other end is fixedly connected to the eccentric shaft. The buffer spring is made of high-quality spring steel and has a suitable elastic coefficient and fatigue life. After the damping block absorbs the vibration energy, the remaining vibration is transmitted to the buffer spring. The buffer spring further consumes the vibration energy through elastic deformation, reducing the vibration transmitted to the eccentric shaft.

[0042] 13. Nut: The nut is threaded onto the two ends of the round shaft. The two ends of the round shaft are threaded through the surface of the eccentric shaft. The nut mates with the thread to firmly connect the round shaft, damping block, buffer spring and eccentric shaft and other components together, ensuring the stability of the shock absorption assembly during operation. The nut is made of high-strength alloy steel and has good fastening performance.

[0043] 14. Second circular shaft: Same as the damping component setup, the second set of damping components;

[0044] 15. Third circular shaft: Same as the damping component, the third set of damping components.

[0045] Instructions for use

[0046] Working Principle: When the hedge trimmer is in operation, power is first transmitted to the shaft 1. The rotating shaft 4, which is movably mounted at the lower end of the shaft 1, begins to rotate. The bearings 5, which are movably mounted on the surfaces of both ends of the rotating shaft 4, allow the rotating shaft 4 to rotate smoothly, reducing frictional resistance and ensuring stable power transmission. During power transmission, the round shaft 2 connected to the side of the rotating shaft 4 rotates accordingly. The eccentric shafts 3, which are movably mounted on the surfaces of both ends of the round shaft 2, convert the rotation of the round shaft 2 to meet the different working requirements of the hedge trimmer. Throughout the entire operation, the shock absorption components play a crucial role. The shock absorption components installed on the surface of the round shaft 2 can effectively reduce the shaft's rotation speed. To mitigate the vibration of shaft 1 and enhance its fatigue resistance, specifically, damping blocks 7, which are slidably mounted on the surface of the circular shaft 2 corresponding to both sides of shaft 1, absorb some of the vibration energy during shaft 1's vibration due to their damping characteristics, thus providing initial buffering. A buffer spring 12, which is mounted around the outer end of the damping block 7 on the surface of the circular shaft 2 and whose other end is fixedly connected to the eccentric shaft 3, further absorbs the vibration energy after the damping block 7 absorbs it. The remaining vibration is then transmitted to the buffer spring 12, which further dissipates the vibration energy through elastic deformation, reducing the vibration transmitted to the eccentric shaft 3 and thus lowering the overall vibration of shaft 1. The circular shaft 2 has threads extending through both ends of the eccentric shaft 3. Nuts 13 are threaded onto both ends of the circular shaft 2, firmly connecting all components together and ensuring the stability of the damping assembly during operation. Because the damping assembly consists of three sets evenly surrounding the surface of the damping blocks 7 and installed at one end of the eccentric shaft 3, the damping effect is more uniform and comprehensive. The shaft grooves 6 located at the center of the inner end of the two damping blocks 7 match the bearings 5. The bearings 5 ​​are installed inside the shaft grooves 6, further ensuring the stability of the rotating shaft 4 and also helping to transmit vibrations to the damping blocks 7 for damping. Shaft 1... The limiting block 8 is set on the side end, and its lower end is in contact with the round shaft 2. The fixing column 9 installed at the center of the limiting block 8 passes through the surface of the damping block 7 at both ends and is connected to the fixing bolt 10, which restricts the displacement of the shaft 1 within a certain range and ensures its positional stability during operation. The second limiting block 11 is set at the other end of the shaft 1, which is symmetrically set with the limiting block 8 and is in contact with the surface of the shaft 1, further enhancing the limiting effect on the shaft 1 and ensuring the reliability and stability of the entire hedge trimmer crankshaft during operation. Through the coordinated work of various components, the fatigue-resistant snap-fit ​​hedge trimmer crankshaft is able to operate efficiently and stably.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fatigue-resistant snap-fit ​​hedge trimmer crankshaft, comprising a shaft body (1), a rotating shaft (4) movably mounted at the lower end of the shaft body (1), bearings (5) movably mounted on the surfaces of both ends of the rotating shaft (4), a round shaft (2) for connection provided at the side end of the rotating shaft (4), and eccentric shafts (3) movably mounted on the surfaces of both ends of the round shaft (2), characterized in that, Also includes: A damping assembly is installed on the surface of the round shaft (2) and is a structure used to dampen the shaft body (1).

2. The fatigue-resistant snap-fit ​​hedge trimmer crankshaft according to claim 1, characterized in that: The shock absorption assembly includes a damping block (7), a buffer spring (12), and a nut (13). The damping block (7) for buffering is slidably installed on the surface of the center of the round shaft (2) corresponding to both sides of the shaft body (1). The buffer spring (12) for shock absorption is installed around the outer end of the damping block (7) on the surface of the round shaft (2). The other end of the buffer spring (12) is fixedly connected to the eccentric shaft (3). The two ends of the round shaft (2) are provided with threads for installation through the surface of the eccentric shaft (3). The nut (13) is threadedly connected to the two ends of the round shaft (2).

3. The fatigue-resistant snap-fit ​​hedge trimmer crankshaft according to claim 2, characterized in that: The damping components are provided in three sets, and all three sets of damping components are surrounded on the surface of the damping block (7).

4. The fatigue-resistant snap-fit ​​hedge trimmer crankshaft according to claim 3, characterized in that: The three sets of damping components are installed at one end of the eccentric shaft (3).

5. The fatigue-resistant snap-fit ​​hedge trimmer crankshaft according to claim 2, characterized in that: The two damping blocks (7) have a shaft groove (6) at the center of their inner end that matches the bearing (5), and the bearing (5) is installed inside the shaft groove (6).

6. The fatigue-resistant snap-fit ​​hedge trimmer crankshaft according to claim 1, characterized in that: The side end of the shaft (1) is provided with a limiting block (8) for limiting. The lower end of the limiting block (8) is in contact with the round shaft (2). A fixing column (9) for fixing is installed at the center of the limiting block (8). The two ends of the fixing column (9) penetrate the surface of the damping block (7) and are connected to the fixing bolt (10).

7. The fatigue-resistant snap-fit ​​hedge trimmer crankshaft according to claim 6, characterized in that: The other end of the shaft (1) is provided with a second limiting block (11) for fixing. The second limiting block (11) and the limiting block (8) are symmetrically arranged, and the limiting block (8) and the second limiting block (11) are fitted to the surface of the shaft (1).

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