Guiding device for belt tensioning wheel of front chassis of mowing machine

Abstract

The utility model discloses a belt tensioning wheel guiding device of a front chassis of a mower, and belongs to the field of garden application equipment. A belt tensioning wheel guiding device of a front chassis of a mower comprises a driven belt wheel, a cutter head, a belt and a clutch, the driven belt wheel is rotationally fixed on the cutter head, the driven belt wheel and the clutch are in transmission connection through a belt, and the belt tensioning wheel guiding device is characterized in that a belt tensioning wheel assembly is further arranged on the cutter head and comprises a belt tensioning wheel arranged on the cutter head, and the belt tensioning wheel is arranged on the cutter head. The side, close to the driven belt wheel, of the belt tensioning wheel is arranged on the cutter head in a turnover mode, and the belt tensioning wheel is in contact connection with the belt. According to the utility model, the belt tensioning wheel structure capable of turning over around the cutter head is arranged to play a role in guiding the belt, so that the friction force on the belt is reduced, and the service life of the belt is prolonged. And the device is simple in structure, convenient to process and suitable for wide popularization.

Description

Technical Field

[0001] The utility model relates to a lawn mower, in particular to a belt pulley guide device for a front chassis of the lawn mower. Background Art

[0002] A lawn mower is a mechanical tool widely used in households or companies for mowing lawn vegetation. It has the characteristics of rapid weeding and neat trimming. The main transmission structure of the lawn mower includes a clutch, a driven pulley, a belt, a cutter disc, and a tension pulley. In its actual working process, such as when running in a wavy lawn, the height of the cutter disc must be adjusted every time the lawn mower goes uphill or downhill to achieve the purpose of trimming the lawn neatly. In the internal transmission structure of the existing lawn mower, the tension pulley and the driven pulley are fixed on a horizontal plane. As the height of the lawn mower's cutter disc is adjusted, the tension pulley is always in a horizontal position, and the belt and the tension pulley form an angle. The belt and the tension pulley will produce greater friction, which will seriously affect the service life of the belt, thereby increasing the failure rate of the lawn mower and reducing the working efficiency when using the lawn mower. Utility Model Content

[0003] The utility model aims to provide a belt tensioning wheel guiding device for the front chassis of a lawn mower, which can improve the service life of the belt and the belt tensioning wheel can provide a guiding function for the belt.

[0004] The technical purpose of the utility model is achieved through the following technical solutions: a front chassis tensioning pulley guide device of a lawn mower, comprising a driven pulley, a cutter disc, a belt, and a clutch, wherein the driven pulley is rotatably fixed on the cutter disc, and the driven pulley and the clutch are connected by a belt drive, and is characterized in that a tensioning pulley assembly is also provided on the cutter disc, and the tensioning pulley assembly comprises a tensioning pulley arranged on the cutter disc, and the side of the tensioning pulley close to the driven pulley can be flipped and arranged on the cutter disc, and the tensioning pulley is in contact with the belt.

[0005] Preferably, the tensioning pulley assembly comprises a left tensioning pulley and a right tensioning pulley, wherein the left tensioning pulley and the right tensioning pulley are respectively located on the left and right sides of the driven pulley and are in contact with and connected to the belt.

[0006] Preferably, the left tensioning pulley and the right tensioning pulley are rotatably arranged on the cutter disc.

[0007] Preferably, the tensioning pulley assembly further comprises a fixing frame, and the left tensioning pulley and the right tensioning pulley are both rotatably arranged on the fixing frame, and the left tensioning pulley and the right tensioning pulley can be flipped and arranged on the cutter disc through the fixing frame.

[0008] Preferably, a left tension pulley fixing plate is further provided on the fixing frame, and the left tension pulley fixing plate can be slidably arranged on the fixing frame, and a tension spring is arranged between the left tension pulley fixing plate and the fixing frame.

[0009] Preferably, the tensioning pulley assembly further comprises a connecting rod, one end of which is connected to a fixing frame, and the other end of which is connected to a frame of a clutch.

[0010] The beneficial effect of the utility model is that when the cutter disc moves upward, the tensioning pulley assembly will rotate downward, and the belt will also rotate along the tensioning pulley at the same time, keeping parallel with the tensioning pulley; when the cutter disc moves downward, the tensioning pulley assembly will rotate upward, and the belt will always keep parallel with the tensioning pulley. The rotation of the tensioning pulley of this design guides the belt, greatly improving the working life of the belt; and the utility model has a simple structure and is easy to process, and is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0012] Figure 1 It is a schematic diagram of the subjective structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of the tensioning pulley assembly provided by the utility model;

[0014] Figure 3 It is a schematic diagram of the position of the belt and the tension pulley assembly when the cutter disc of the utility model moves downward;

[0015] Figure 4 It is a schematic diagram of the position of the belt and the tension pulley assembly when the cutter disc of the utility model moves in parallel;

[0016] Figure 5 It is a schematic diagram of the position of the belt and the tensioning pulley assembly when the cutter disc of the utility model moves upward;

[0017] In the above figures, 1, driven pulley; 2, tension pulley assembly; 21, fixed frame; 3, cutter disc; 4, belt; 5, clutch; 6, rotary cutter seat assembly; 7, bolt; 8, elastic washer; 9, flat washer; 10, right tension pulley; 101, left tension pulley; 11, bushing; 12, right tension pulley fixing plate; 13, connecting rod; 14 fixing rod; 15, tension spring; 16, rotating rod; 17 left tension pulley fixing plate. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] Embodiment 1, as Figure 1 to Figure 5 As shown, the present embodiment aims to provide a device capable of increasing the service life of the belt and providing a guiding effect on the belt. To this end, the present embodiment provides a front chassis tensioning pulley guiding device for a lawn mower, comprising a driven pulley 1, a cutter disc 3, a belt 4, and a clutch 5. The driven pulley 1 is rotatably fixed on the cutter disc 3, and the driven pulley 1 and the clutch 5 are connected by a belt 4 transmission. It is characterized in that a tensioning pulley assembly 2 is also provided on the cutter disc 3, and the tensioning pulley assembly 2 includes a tensioning pulley 10 arranged on the cutter disc, and the tensioning pulley 10 can be flipped and arranged on the cutter disc 3 on a side close to the driven pulley, and the tensioning pulley 10 is in contact with the belt 4.

[0021] Taking into account the guiding problem of belt 4, it is necessary to provide a steering force for belt 4. In this example, the side of the fixed frame 21 close to the driven pulley 1 is flipped and connected to the cutter disc 3 through the rotating rod 16, and the tensioning pulley 10 is fixed on the fixed frame 21. The tensioning pulley 10 can rotate around the rotating rod 16 on the cutter disc 3 through the fixed frame 21. To this end, a right tensioning pulley 10 can be set on the right side of the driven pulley 1 to contact and connect with the belt 1 for guidance, or a left tensioning pulley 101 and a right tensioning pulley 10 can be set on both sides of the driven pulley 1 to contact and connect with the belt 4 for guidance. When the cutter disc 3 moves upward, the tensioning pulley will rotate downward around the rotating rod 16, and the belt 4 will also rotate along the tensioning pulley at the same time, keeping parallel to the tensioning pulley. When the cutter disc 3 moves downward, the tensioning pulley will rotate upward around the rotating rod 16, and the belt 4 will also rotate along the tensioning pulley at the same time, so that the belt 4 always keeps parallel to the tensioning pulley. Taking the belt friction problem into consideration, the friction force generated by rolling friction is smaller. For this purpose, the right tension pulley 10 can be set to be fixed on the right tension pulley fixing plate 12. The right tension pulley 10 does not rotate relative to the right tension pulley fixing plate 12 following the movement of the belt 4, and there is sliding friction between the belt 4 and the right tension pulley 10. In this example, as a preference, the right tension pulley 10 is rotationally connected to the right tension pulley fixing plate 12, and the right tension pulley 10 can rotate relative to the right tension pulley fixing plate 12 following the movement of the belt 4, and there is rolling friction between the belt 4 and the right tension pulley.

[0022] Taking the belt tensioning problem into consideration, it is necessary to provide a tensioning force for the belt 4. To this end, a left tensioning pulley fixing plate 17 can be set to be slidably connected with the fixing frame 21, and the right tensioning pulley fixing plate 12 can be fixedly connected with the fixing frame 21. The left tensioning pulley 101 can slide left and right following the left tensioning pulley fixing plate 17. Two tension springs 15 are connected at both ends where the left tensioning pulley fixing plate 17 and the fixing frame 21 are close to each other, so as to play a tensioning role. Alternatively, both the left and right tensioning pulley fixing plates can be set to be slidably connected with the fixing frame 21, and the left and right tensioning pulleys can slide left and right following the left and right tensioning pulley fixing plates relative to the fixing frame 21. Two tension springs 15 are connected at both sides where the left tensioning pulley fixing plate 17 and the right tensioning pulley fixing plate 12 are close to each other, so as to achieve the effect of tensioning the belt 4.

[0023] Taking into account the problem that the belt may fall off relative to the tensioning pulley, it is necessary to make the belt 4 turn more smoothly. For this purpose, several tension springs 15 can be added between the tensioning pulley fixing plate and the fixing frame 21 to increase the tensioning force, so that the contact between the belt 4 and the tensioning pulley is more compact. A connecting rod 13 can also be fixedly connected to one end of the fixing frame 21 by bolts, and the other end of the connecting rod 13 is fixedly connected to the frame of the clutch 5, which plays an auxiliary role in guiding the belt 4 and makes the belt 4 turn more smoothly.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A belt pulley guide device for a front chassis of a lawn mower, comprising a driven pulley, a cutter disc, a belt, and a clutch, wherein the driven pulley is rotatably fixed on the cutter disc, and the driven pulley and the clutch are connected via a belt drive, characterized in that: The cutter disc is also provided with a tensioning pulley assembly, which includes a tensioning pulley arranged on the cutter disc. The side of the tensioning pulley close to the driven pulley can be flipped and arranged on the cutter disc. The tensioning pulley is in contact with the belt.

2. The lawn mower front chassis tension pulley guide device according to claim 1, characterized in that: The tensioning pulley assembly comprises a left tensioning pulley and a right tensioning pulley, wherein the left tensioning pulley and the right tensioning pulley are respectively located at the left and right sides of the driven pulley and are in contact with and connected to the belt.

3. The lawn mower front chassis tension pulley guide device according to claim 2, characterized in that: The left tensioning pulley and the right tensioning pulley are rotatably arranged on the cutter disc.

4. The lawn mower front chassis tension pulley guide device according to claim 2, characterized in that: The tensioning pulley assembly also includes a fixing frame, and the left tensioning pulley and the right tensioning pulley are both rotatably arranged on the fixing frame, and the left tensioning pulley and the right tensioning pulley can be flipped and arranged on the cutter disc through the fixing frame.

5. The lawn mower front chassis tension pulley guide device according to claim 4, characterized in that: The fixing frame is also provided with a left tensioning pulley fixing plate, the left tensioning pulley fixing plate can be slidably arranged on the fixing frame, and a tension spring is arranged between the left tensioning pulley fixing plate and the fixing frame.

6. The lawn mower front chassis tension pulley guide device according to claim 4, characterized in that: The tensioning pulley assembly also includes a connecting rod, one end of which is connected to a fixing frame, and the other end of which is connected to a frame of a clutch.

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