Mower clutch additionally provided with anti-collapse device

Abstract

The utility model discloses a mowing device clutch additionally provided with an anti-collapse device, which comprises a rotating stand and a drum wheel, the rotating stand is connected with a driving shaft of an engine, the drum wheel is connected with a driven shaft of a mowing machine, rotating shafts are symmetrically arranged on the rotating stand, brake blocks are rotatably connected onto the rotating shafts, anti-collapse components are arranged on the brake blocks, and the anti-collapse components are connected with the drum wheel. The utility model discloses a mowing device clutch additionally provided with an anti-collapse device, which comprises a drum wheel and two anti-collapse assemblies, the two anti-collapse assemblies are symmetrically arranged inside the drum wheel, and each anti-collapse assembly comprises a compensation block and a contact block. The mowing device clutch additionally provided with the anti-collapse device has the advantages that when the clutch tends to crack, the anti-collapse assemblies start to work; the compensation block moves outwards under the action of centrifugal force and stretches the secondary spring, and the contact block is attached to the compensation block under the guide action of the guide block. At the moment, the engine driving shaft continuously drives the roller to rotate through transmission of the contact block and the compensation block, the situation that the whole clutch cannot continuously work due to clutch cracking is prevented, the service life is prolonged, and use safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of lawn mower clutches, in particular to a lawn mower clutch with an anti-collapse device. Background Art

[0002] Developing agricultural mechanization, improving work efficiency, and improving agricultural production efficiency are particularly important in a large agricultural country like ours. As a tool that plays an important role in agricultural production, the lawn mower has the most direct impact on the yield of crops. Its invention is a great progress in human civilization. Lawn mowers are also called weeders, lawn mowers, lawn trimmers, etc. Lawn mowers are mechanical tools used to trim lawns, vegetation, etc., and are divided into diesel engines and gasoline engines. It consists of a cutter disc, an engine, a running wheel, a running mechanism, a blade, an armrest, a control, and other parts. The blade uses the high-speed rotation of the engine to greatly increase the output speed, saving the working time of weeding workers and reducing a large amount of human resources. In countries where animal husbandry mechanization is highly developed, the research on new lawn mowers is developing in the direction of high speed and energy saving.

[0003] The existing Chinese patent with publication number CN 209861648 U discloses a lawn mower clutch, including a clutch block No. 1, one end outer surface of the clutch block No. 1 is fixedly connected with a permanent magnet block No. 2, one side outer surface of the clutch block No. 1 is provided with a connecting tube, the upper end outer surface of the permanent magnet block No. 2 is provided with a permanent magnet block No. 1, the upper end outer surface of the permanent magnet block No. 1 is fixedly connected with a clutch block No. 2, the middle outer surface of the clutch block No. 2 is provided with a limit anti-drop buckle, and the inner surface of the limit anti-drop buckle is provided with a clutch spring. The lawn mower clutch described in the utility model is provided with a limit anti-drop buckle, a shock-absorbing buffer ring, a permanent magnet block No. 1 and a permanent magnet block No. 2, which is conducive to the normal operation of the clutch, and can also facilitate the rapid engagement and closure of the clutch, bringing better prospects for use.

[0004] However, the above patent still has some shortcomings. Although the quick engagement and merging of the clutch is achieved by setting the No. 1 permanent magnet block and the No. 2 permanent magnet block, it is also accompanied by the fact that at the beginning of the initial work, a larger rotation speed is required to achieve a larger centrifugal force to separate the No. 1 permanent magnet block from the No. 2 permanent magnet block. This results in a long time difference from the start of the engine to the operation of the lawn mower blade, which in turn affects the corresponding speed and is not easy to operate. In addition, similar to most similar lawn mower clutches, the friction between the brake block and the drum wheel in the clutch is reduced after long-term use, resulting in slippage during operation. Utility Model Content

[0005] In order to solve the deficiencies mentioned in the above background technology, the purpose of the utility model is to provide a lawn mower clutch equipped with an anti-collapse device. When the clutch shows a tendency to collapse, the anti-collapse component starts to work, the compensation block moves outward under the action of centrifugal force, and stretches the secondary spring, and the contact block fits with the compensation block under the guidance of the guide block. At this time, the engine driving shaft continues to drive the roller to rotate through the contact block and the compensation block, preventing the entire clutch from continuing to work due to the collapse of the clutch, thereby increasing the service life and safety of use.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A lawn mower clutch equipped with an anti-collapse device comprises a rotating frame and a drum wheel, wherein the rotating frame is connected to the engine driving shaft, and the drum wheel is connected to the lawn mower passive shaft. The rotating frame is symmetrically provided with a rotating shaft, and a brake block is rotatably connected to the rotating shaft, and an anti-collapse component is provided on the brake block. Two anti-collapse components are provided, and the two anti-collapse components are symmetrically arranged inside the drum wheel. The anti-collapse component comprises a compensation block and a contact block, and the contact block is fixedly installed inside the drum wheel. The engine driving shaft drives the rotating frame to rotate, and the rotating frame drives the brake block to rotate through the rotating shaft. Under the action of centrifugal force, the brake block moves eccentrically away from one end of the rotating shaft until it contacts the drum wheel, thereby driving the roller and the passive shaft, and then the blade starts to rotate.

[0008] Further preferably, the anti-collapse component also includes a guide block, which is fixedly mounted on the compensation block, and a guide groove is provided on the brake block. The guide block is located inside the guide groove, and the outer side surface of the guide block is in contact with the inner side surface of the guide groove.

[0009] Further preferably, a guide rod is installed on the compensation block, and a baffle is installed on the gate block, one end of the guide rod passes through the baffle, and a secondary spring is sleeved on the outer surface of the guide rod and located between the baffle and the compensation block, and both ends of the secondary spring are fixedly connected to the baffle and the compensation block respectively.

[0010] Further preferably, a side surface of the compensation block close to the contact block is an arc-shaped surface, the arc-shaped surface of the compensation block is flush with the friction surface of the brake block, and a V-shaped groove is provided on the arc-shaped surface of the compensation block.

[0011] Further preferably, the cross-sectional shape of the contact block is V-shaped, and the opening angle of the V-shaped groove is smaller than the opening angle of the V-shaped cross-sectional shape on the contact block.

[0012] Further preferably, a spring mounting seat is provided on the side where the two brake blocks are close to each other, and a primary spring is installed between the two spring mounting seats, and the elastic force of the secondary spring is smaller than that of the primary spring. Before the roller starts to rotate, when the engine is still rotating at a low speed, since the elastic force of the secondary spring is smaller than that of the primary spring, the compensation block will respond first, and the compensation block moves outward under the action of centrifugal force, and stretches the secondary spring. The contact block fits with the compensation block under the guidance of the guide block, thereby first driving the drum to rotate at a low speed, so that when the user is in use, he can get faster feedback after pressing the control switch. The traditional clutch instantly drives the blade to rotate at a high speed at a high speed, and at that moment, the inertia will give the control lever a reverse torque. If the control lever is not held tightly, the control lever will be instantly out of hand, posing a safety hazard. The present device is easier to operate.

[0013] Beneficial effects of the utility model:

[0014] 1. When the clutch shows a tendency to collapse, the anti-collapse component starts to work, the compensation block moves outward under the action of centrifugal force, stretches the secondary spring, and the contact block fits with the compensation block under the guidance of the guide block. At this time, the engine driving shaft continues to drive the roller to rotate through the contact block and the compensation block, preventing the entire clutch from continuing to work due to clutch collapse, thereby increasing the service life and safety of use;

[0015] 2. When the engine is still rotating at a low speed, the compensation block of the utility model responds first because the elastic force of the secondary spring is smaller than that of the primary spring. The compensation block moves outward under the action of centrifugal force and stretches the secondary spring. The contact block fits with the compensation block under the guidance of the guide block, thereby driving the drum wheel to rotate at a low speed first, so that the user can get faster feedback after pressing the control switch when using it. The traditional clutch instantly drives the blade to rotate at a high speed at a high speed, and at that moment, the inertia will give the control lever a reverse torque. If the control lever is not held tightly, the control lever will instantly slip out of the hand, posing a safety hazard. The utility model is easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a sectional view of the overall structure of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the anti-collapse component in the utility model;

[0020] Figure 4It is a schematic diagram of the explosion structure of the anti-collapse component in the utility model.

[0021] In the figure:

[0022] 1. Rotating frame; 2. Drum wheel; 3. Rotating shaft; 4. Brake block; 5. Compensation block; 6. Contact block; 7. Guide block; 8. Guide groove; 9. Guide rod; 10. Baffle; 11. Secondary spring; 12. V-shaped groove; 13. Spring mounting seat; 14. Primary spring. DETAILED DESCRIPTION

[0023] 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 of 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.

[0024] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] like Figure 1-4 As shown, a lawn mower clutch equipped with an anti-collapse device includes a rotating frame 1 and a drum 2, wherein the rotating frame 1 is connected to the engine driving shaft, and the drum 2 is connected to the lawn mower passive shaft. The rotating frame 1 is symmetrically provided with a rotating shaft 3, and a brake block 4 is rotatably connected to the rotating shaft 3, and an anti-collapse component is provided on the brake block 4. There are two anti-collapse components, and the two anti-collapse components are symmetrically arranged inside the drum 2. The anti-collapse component includes a compensation block 5 and a contact block 6, and the contact block 6 is fixedly installed inside the drum 2. The engine driving shaft drives the rotating frame 1 to rotate, and the rotating frame 1 drives the brake block 4 to rotate through the rotating shaft 3. Under the action of centrifugal force, the brake block 4 moves eccentrically away from one end of the rotating shaft 3 until it contacts the drum 2, thereby driving the roller and the passive shaft, and then the blade starts to rotate.

[0026] In another embodiment, the anti-collapse component also includes a guide block 7, which is fixedly mounted on the compensation block 5. A guide groove 8 is provided on the brake block 4. The guide block 7 is located inside the guide groove 8, and the outer side surface of the guide block 7 is in contact with the inner side surface of the guide groove 8.

[0027] In another embodiment, a guide rod 9 is installed on the compensation block 5, and a baffle 10 is installed on the gate block 4. One end of the guide rod 9 passes through the baffle 10. A secondary spring 11 is sleeved on the outer surface of the guide rod 9 and located between the baffle 10 and the compensation block 5. The two ends of the secondary spring 11 are fixedly connected to the baffle 10 and the compensation block 5 respectively.

[0028] In another embodiment, the side surface of the compensation block 5 close to the contact block 6 is an arc-shaped surface, the arc-shaped surface of the compensation block 5 is flush with the friction surface of the brake block 4, and a V-shaped groove 12 is opened on the arc-shaped surface of the compensation block 5.

[0029] In another embodiment, the cross-sectional shape of the contact block 6 is V-shaped, and the opening angle of the V-shaped groove 12 is smaller than the opening angle of the V-shaped cross-sectional shape of the contact block 6.

[0030] In another embodiment, a spring mounting seat 13 is provided on the side where the two brake blocks 4 are close to each other, and a primary spring 14 is installed between the two spring mounting seats 13, and the elastic force of the secondary spring 11 is smaller than the elastic force of the primary spring 14. Before the roller starts to rotate, when the engine is still rotating at a low speed, since the elastic force of the secondary spring 11 is smaller than the elastic force of the primary spring 14, the compensation block 5 will respond first, and the compensation block 5 moves outward under the action of centrifugal force, and stretches the secondary spring 11. The contact block 6 fits with the compensation block 5 under the guidance of the guide block 7, thereby first driving the drum wheel 2 to rotate at a low speed, so that when the user is in use, he can get faster feedback after pressing the control switch. The traditional clutch instantly drives the blade to rotate at a high speed at a high speed, and at that moment, the control lever will be given a reverse torque due to inertia. If the control lever is not held tightly, the control lever will be instantly released, which poses a safety hazard. The present device is easier to operate.

[0031] The working process of the mower clutch equipped with the anti-collapse device is as follows: when the mower is working, the engine driving shaft drives the rotating frame 1 to rotate, and the rotating frame 1 drives the brake block 4 to rotate through the rotating shaft 3. Under the action of centrifugal force, the brake block 4 moves eccentrically away from the end of the rotating shaft 3 until it contacts the drum wheel 2, thereby driving the roller and the driven shaft, and then the blade starts to rotate.

[0032] Before the roller starts to rotate, when the engine is still rotating at a low speed, since the elastic force of the secondary spring 11 is less than the elastic force of the primary spring 14, the compensation block 5 will respond first, and the compensation block 5 moves outward under the action of centrifugal force and stretches the secondary spring 11. The contact block 6 fits with the compensation block 5 under the guidance of the guide block 7, thereby first driving the drum wheel 2 to rotate at a low speed, so that the user can get faster feedback after pressing the control switch when using it. The traditional clutch instantly drives the blade to rotate at a high speed at high speed, and at that moment it will give the control lever a reverse torque due to inertia. If the control lever is not held tightly, the control lever will instantly slip out of the hand, posing a safety hazard. The present device is easier to operate.

[0033] When the clutch shows a tendency to collapse, the anti-collapse component starts to work, the compensation block 5 moves outward under the action of centrifugal force, and stretches the secondary spring 11, and the contact block 6 fits with the compensation block 5 under the guidance of the guide block 7. At this time, the engine driving shaft continues to drive the roller to rotate through the contact block 6 and the compensation block 5, preventing the entire clutch from continuing to work due to clutch collapse, thereby increasing the service life and safety of use.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A lawn mower clutch equipped with an anti-collapse device, characterized in that: The invention comprises a rotating frame (1) and a drum wheel (2), wherein the rotating frame (1) is connected to an engine driving shaft, and the drum wheel (2) is connected to a lawn mower driven shaft. A rotating shaft (3) is symmetrically arranged on the rotating frame (1), a brake block (4) is rotatably connected to the rotating shaft (3), and an anti-collapse component is arranged on the brake block (4). Two anti-collapse components are arranged symmetrically inside the drum wheel (2), and the anti-collapse component comprises a compensation block (5) and a contact block (6), and the contact block (6) is fixedly installed inside the drum wheel (2).

2. The lawn mower clutch with an anti-collapse device according to claim 1, characterized in that: The anti-collapse component also includes a guide block (7), the guide block (7) is fixedly mounted on the compensation block (5), a guide groove (8) is provided on the brake block (4), the guide block (7) is located inside the guide groove (8), and the outer side surface of the guide block (7) is in contact with the inner side surface of the guide groove (8).

3. The lawn mower clutch with an anti-collapse device according to claim 1, characterized in that: A guide rod (9) is mounted on the compensation block (5), and a baffle (10) is mounted on the brake block (4). One end of the guide rod (9) passes through the baffle (10). A secondary spring (11) is sleeved on the outer surface of the guide rod (9) and located between the baffle (10) and the compensation block (5). Two ends of the secondary spring (11) are fixedly connected to the baffle (10) and the compensation block (5) respectively.

4. The lawn mower clutch with an anti-collapse device according to claim 3, characterized in that: A spring mounting seat (13) is provided on one side of the two brake blocks (4) close to each other, a primary spring (14) is installed between the two spring mounting seats (13), and the elastic force of the secondary spring (11) is smaller than the elastic force of the primary spring (14).

5. The lawn mower clutch with an anti-collapse device according to claim 1, characterized in that: The side surface of the compensation block (5) close to the contact block (6) is an arc-shaped surface, the arc-shaped surface of the compensation block (5) is flush with the friction surface of the brake block (4), and a V-shaped groove (12) is provided on the arc-shaped surface of the compensation block (5).

6. The lawn mower clutch with an anti-collapse device according to claim 5, characterized in that: The cross-sectional shape of the contact block (6) is V-shaped, and the opening angle of the V-shaped groove (12) is smaller than the opening angle of the V-shaped cross-sectional surface on the contact block (6).

Images