Lawn mower clutch with long service life

Abstract

The mower clutch long in service life comprises a clutch disc, a first clutch disc, a second clutch disc and a rigid spring, a shaft hole is formed in the center of the clutch disc, the two ends of one side of the clutch disc are connected with the first clutch disc and the second clutch disc through connecting pieces respectively, and the first clutch disc and the second clutch disc are connected with the rigid spring. Two sets of sleeves are arranged on one side of the clutch disc, pressing plates are arranged at the two ends of the interior of each sleeve through rigid springs, connecting hooks are arranged at the ends, away from the rigid springs, of the pressing plates, second reserved holes are formed in the two ends of the clutch disc, and limiting grooves are formed in the two sides of the interior of each sleeve. According to the clutch, the clutch disc, the shaft hole, the first clutch disc, the second clutch disc, the preformed hole, the sleeve, the rigid spring, the connecting hook, the pressing plate, the limiting groove and the limiting block are installed, so that the rigid spring is not prone to distortion and deviation in the repeated stretching and resetting process, the working stability is improved, and the service life of the clutch is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mower clutches, in particular to a lawn mower clutch with a long service life. Background Art

[0002] A lawn mower, also known as a weed cutter, lawn mower, lawn trimmer, etc., is a mechanical tool used to trim lawns, vegetation, etc. The lawn mower clutch is an important component of the lawn mower. Its function is to control the start and stop of the lawn mower blade, so that the lawn mower can perform mowing work flexibly.

[0003] The lawn mower clutch is mainly composed of a clutch plate and a clutch disc. The clutch plate is separated and contacted by rotating the clutch disc. When the clutch plate is separated, the mowing disc stops rotating. When the two are in contact, power is transmitted to the mowing disc, thereby achieving mowing. The general lawn mower clutch is a single-spring mechanism, which is usually not very stable during normal operation. For example, a double-spring lawn mower clutch disclosed in Patent No. CN214508068U can ensure the connection of various components through the setting of double clutch springs, making the clutch more stable during use. However, the spring structure of the clutch is relatively simple, and it is easy to twist and distort under long-term elastic deformation, which will affect the normal operation of the clutch over time and reduce its service life. Utility Model Content

[0004] The purpose of the utility model is to provide a lawn mower clutch with a long service life, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a lawn mower clutch with a long service life, comprising a clutch disc, a first clutch plate, a second clutch plate and a rigid spring, an axial hole being provided at the central position of the clutch disc, and the two ends of one side of the clutch disc are respectively connected to the first clutch plate and the second clutch plate through connecting members, two groups of sleeves are provided on one side of the clutch disc, and pressure plates are provided at both ends of the sleeve through the rigid spring, and a connecting hook is provided at one end of the pressure plate away from the rigid spring, a second reserved hole is provided at both ends of the clutch disc, a first reserved hole is provided on the first clutch plate and the second clutch plate, the connecting hook is respectively connected to the second reserved hole and the first reserved hole, limiting grooves are provided on both sides of the sleeve, and limiting blocks matching the limiting grooves are provided at both ends of the pressure plate.

[0006] Preferably, the first clutch plate and the second clutch plate are distributed symmetrically about the shaft hole, and the outer sides of the first clutch plate and the second clutch plate are both provided with wear-resistant parts.

[0007] Preferably, both ends of the first clutch plate and the second clutch plate are respectively provided with a protrusion and a groove, and the protrusions correspond to the grooves respectively.

[0008] Preferably, a mounting piece is provided on one side of the wear-resistant portion, and the mounting piece is evenly fixedly connected to the first clutch plate and the second clutch plate through bolts.

[0009] Preferably, a locking nut is provided on the top of each bolt, and the end of each locking nut close to the mounting piece is tightly fitted with the mounting piece through a bulge, and an elastic strip is provided between the bulge and the locking nut.

[0010] Preferably, the elastic strips are made of rubber strips with an arched structure, and both ends of the elastic strips are against the bulge.

[0011] Preferably, the protrusions are all made of permanent magnets, and the interiors of the grooves are all provided with magnetic materials.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the lawn mower clutch with a long service life is equipped with a clutch disc, a shaft hole, a first clutch plate, a second clutch plate, a reserved hole, a sleeve, a rigid spring, a connecting hook, a pressure plate, a limit groove and a limit block, and is connected to the shaft hole through a drive shaft. The driving device drives the clutch disc to rotate through the drive shaft, so that the first clutch plate and the second clutch plate rotate at a high speed and generate centrifugal force, so that the first clutch plate and the second clutch plate are separated from each other, so that their outer sides contact the blade of the lawn mower, driving the blade to rotate and cut grass. When the first clutch plate and the second clutch plate are separated, the pressure plate at one end of the connecting hook pulls the rigid spring in the sleeve. When the driving device stops running, the first clutch plate and the second clutch plate do not have enough speed to achieve centrifugal movement, so the operation of the cutter can be stopped, and the rigid spring rebounds and resets at the same time. During this process, the limit blocks on both sides of the pressure plate slide in the limit grooves provided in the sleeve, limiting the range of movement of the rigid spring, so that the rigid spring is not prone to distortion and deviation during repeated stretching and resetting, thereby improving the stability during operation and extending the service life of the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

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

[0015] Figure 2This is a schematic diagram of the cross-sectional structure of the sleeve of the present utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the wear-resistant part of the utility model;

[0017] Figure 4 For the utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0018] In the figure: 1. clutch disc; 2. first clutch plate; 3. second clutch plate; 4. mounting part; 5. locking nut; 6. sleeve; 7. reserved hole; 8. shaft hole; 9. wear-resistant part; 10. connecting part; 11. connecting hook; 12. pressure plate; 13. rigid spring; 14. limiting groove; 15. limiting block; 16. bolt; 17. bulge; 18. elastic strip; 19. protrusion; 20. groove. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-4 The present invention provides an embodiment of a lawn mower clutch with a long service life, comprising a clutch disc 1, a first clutch plate 2, a second clutch plate 3, and a rigid spring 13. An axial hole 8 is provided at the center of the clutch disc 1, and the first clutch plate 2 and the second clutch plate 3 are connected to each other at both ends of one side of the clutch disc 1 via connecting members 10.

[0021] The first clutch plate 2 and the second clutch plate 3 are symmetrically distributed about the shaft hole 8, and the outer sides of the first clutch plate 2 and the second clutch plate 3 are both provided with a wear-resistant portion 9;

[0022] Connect the drive shaft of the lawn mower drive device to the shaft hole 8 on the clutch disc 1. The drive device drives the clutch disc 1 to rotate through the drive shaft, causing the first clutch plate 2 and the second clutch plate 3 to rotate at high speed and generate centrifugal force;

[0023] The first clutch plate 2 and the second clutch plate 3 are separated from each other, so that the wear-resistant portion 9 on the outside of the clutch plate 2 contacts the blade of the lawn mower, driving the blade to rotate and thus mowing the lawn.

[0024] A mounting member 4 is provided on one side of the wear-resistant portion 9, and the mounting member 4 is evenly fixedly connected to the first clutch plate 2 and the second clutch plate 3 by bolts 16, which facilitates the replacement of the wear-resistant portion 9 when it is damaged, without having to replace the first clutch plate 2 and the second clutch plate 3 as a whole;

[0025] A locking nut 5 is provided on the top of each bolt 16, and the end of the locking nut 5 close to the mounting member 4 is tightly fitted with the mounting member 4 through a bulge 17, and an elastic strip 18 is provided between the bulge 17 and the locking nut 5;

[0026] The elastic strips 18 are all made of rubber strips with an arched structure, and both ends of the elastic strips 18 are against the bulge 17. When the first clutch plate 2 and the second clutch plate 3 rotate at high speed, the external force can be dispersed and buffered by the elastic strips 18 with an arched structure, thereby improving the stability of the installation of the wear-resistant part 9.

[0027] Two sets of sleeves 6 are provided on one side of the clutch disc 1, and pressure plates 12 are provided at both ends of the sleeve 6 through rigid springs 13, and a connecting hook 11 is provided at one end of the pressure plate 12 away from the rigid spring 13;

[0028] The clutch disc 1 is provided with a second reserved hole 21 at both ends, and the first clutch plate 2 and the second clutch plate 3 are provided with a first reserved hole 7. The connecting hook 11 is connected to the second reserved hole 21 and the first reserved hole 7 respectively.

[0029] When the first clutch plate 2 and the second clutch plate 3 are separated, the pressure plate 12 at one end of the connecting hook 11 pulls the rigid spring 13 in the sleeve 6. When the driving device stops running, the first clutch plate 2 and the second clutch plate 3 do not have enough speed to achieve centrifugal movement, and the driving effect on the cutting blade is lost, thereby stopping the operation of the cutter. At the same time, the rigid spring 13 rebounds and resets;

[0030] Limiting grooves 14 are provided on both sides of the interior of the sleeve 6, and limiting blocks 15 matching the limiting grooves 14 are provided at both ends of the pressure plate 12;

[0031] During the process of the rigid spring 13 being stretched and reset, the limit blocks 15 on both sides of the pressure plate 12 slide in the limit grooves 14 provided inside the sleeve 6, thereby limiting the range of motion of the rigid spring 13. This makes it less likely for the rigid spring 13 to be twisted and deflected during repeated stretching and reset, thereby improving the stability during operation and extending the service life of the clutch.

[0032] The first clutch plate 2 and the second clutch plate 3 are provided with a protrusion 19 and a groove 20 at both ends, and the protrusion 19 corresponds to the groove 20 respectively;

[0033] The protrusions 19 are all made of permanent magnets, and the interior of the grooves 20 is provided with magnetic materials, which facilitates the centripetal movement of the first clutch plate 2 and the second clutch plate 3 under the force of the rigid spring 13 and achieves accurate and rapid contact between the two.

[0034] Working principle: When the embodiment of the present application is in use, the driving shaft of the lawn mower driving device is connected to the shaft hole 8 on the clutch disc 1. The driving device drives the clutch disc 1 to rotate through the driving shaft, so that the first clutch plate 2 and the second clutch plate 3 rotate at high speed and generate centrifugal force. The first clutch plate 2 and the second clutch plate 3 are separated from each other, so that the wear-resistant part 9 on the outer side contacts the blade of the lawn mower, driving the blade to rotate to achieve mowing. When the first clutch plate 2 and the second clutch plate 3 are separated, the pressure plate 12 at one end of the connecting hook 11 pulls the rigid spring 13 in the sleeve 6. When the driving device stops running, the first clutch plate 2 and the second clutch plate 3 do not have enough speed to achieve centrifugal movement, and the driving effect on the cutting blade is lost, thereby stopping the operation of the cutter. At the same time, the rigid spring 1 3 rebound reset, during this process, the limit blocks 15 on both sides of the pressure plate 12 slide in the limit grooves 14 opened inside the sleeve 6, limiting the range of motion of the rigid spring 13, so that the rigid spring 13 is not prone to twisting and deviation during repeated stretching and resetting, thereby improving the stability during operation and extending the service life of the clutch. In addition, the wear-resistant part 9 is connected to the first clutch plate 2 and the second clutch plate 3 through the bolts 16 and the locking nuts 5 on the mounting part 4, which is convenient for disassembly and replacement when the wear-resistant part 9 is damaged, without the need to replace the first clutch plate 2 and the second clutch plate 3 as a whole. In addition, when the first clutch plate 2 and the second clutch plate 3 rotate at high speed, the elastic strips 18 of the arch structure can disperse and buffer the external force, thereby improving the stability of the installation of the wear-resistant part 9.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lawn mower clutch with a long service life, characterized in that: The invention comprises a clutch disc (1), a first clutch plate (2), a second clutch plate (3) and a rigid spring (13), wherein an axial hole (8) is provided at the central position of the clutch disc (1), and the two ends of one side of the clutch disc (1) are connected to the first clutch plate (2) and the second clutch plate (3) respectively through a connecting piece (10), and two sets of sleeves (6) are provided on one side of the clutch disc (1), and pressure plates (12) are provided at both ends of the sleeve (6) through a rigid spring (13), and the pressure plates (12) are away from the rigid spring (13). One end of the spring (13) is provided with a connecting hook (11), both ends of the clutch disc (1) are provided with a second reserved hole (21), the first clutch plate (2) and the second clutch plate (3) are provided with a first reserved hole (7), the connecting hook (11) is connected to the second reserved hole (21) and the first reserved hole (7) respectively, both sides of the sleeve (6) are provided with a limiting groove (14), and both ends of the pressure plate (12) are provided with a limiting block (15) matching the limiting groove (14).

2. A lawn mower clutch with a long service life according to claim 1, characterized in that: The first clutch plate (2) and the second clutch plate (3) are centrally symmetrically distributed about the shaft hole (8), and the outer sides of the first clutch plate (2) and the second clutch plate (3) are both provided with wear-resistant parts (9).

3. The lawn mower clutch with a long service life according to claim 1, characterized in that: Both ends of the first clutch plate (2) and the second clutch plate (3) are respectively provided with a protrusion (19) and a groove (20), and the protrusions (19) correspond to the grooves (20).

4. The lawn mower clutch with a long service life according to claim 2, characterized in that: A mounting member (4) is provided on one side of the wear-resistant portion (9), and the mounting member (4) is evenly fixedly connected to the first clutch plate (2) and the second clutch plate (3) via bolts (16).

5. The lawn mower clutch with a long service life according to claim 4, characterized in that: A locking nut (5) is provided on the top of each bolt (16), and one end of each locking nut (5) close to the mounting member (4) is tightly fitted with the mounting member (4) via a bulge (17), and an elastic strip (18) is provided between the bulge (17) and the locking nut (5).

6. The lawn mower clutch with a long service life according to claim 5, characterized in that: The elastic strips (18) are all made of rubber strips with an arched structure, and both ends of the elastic strips (18) are against the bulge (17).

7. The lawn mower clutch with a long service life according to claim 3, characterized in that: The protrusions (19) are all made of permanent magnets, and the interiors of the grooves (20) are all provided with magnetic attraction materials.

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