Speed regulating mechanism for mower

Abstract

The utility model relates to the technical field of speed regulating mechanisms, in particular to a speed regulating mechanism for a mower. The speed regulating mechanism is arranged on a worm shaft of the worm box in a sleeving mode and comprises a speed regulating base, a speed regulating pull head, an upper belt transmission assembly and a lower belt transmission assembly which are sequentially arranged on the worm shaft in a sleeving mode from bottom to top, and a transmission belt is arranged between the upper belt transmission assembly and the lower belt transmission assembly; the speed regulation base is fixedly connected with the worm box, the speed regulation pull head is in threaded connection with the speed regulation base, the upper belt transmission assembly is fixedly connected with the worm shaft, and the lower belt transmission assembly is connected with the upper belt transmission assembly in an up-down sliding mode. And the speed adjusting pull head is used for adjusting the distance between the upper belt transmission assembly and the lower belt transmission assembly. The friction force between the transmission belt and the upper belt wheel and the friction force between the transmission belt and the lower belt wheel are controlled by adjusting the distance between the upper belt transmission assembly and the lower belt transmission assembly, and then the rotating speed of the transmission belt is adjusted, and speed adjustment is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to speed regulation mechanism technical field, concretely is a kind of speed regulation mechanism for mower. BACKGROUND

[0002] The speed regulation mechanism used on current mower realizes speed regulation by tensioning wheel structure, however, this kind of structure speed regulation is not obvious, cannot smoothly realize speed regulation, in addition, tensioning wheel is easily damaged in the process of use, affect service life.

[0003] Therefore, at present, there is an urgent need for a speed regulation mechanism for mower, which can stably and uniformly regulate speed and reduce the risk of structural damage. SUMMARY

[0004] In view of the above situation, to overcome the defects of the prior art, the utility model provides a speed regulation mechanism of mower to solve the problems involved in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of speed regulation mechanism for mower, speed regulation mechanism is set on the worm shaft of worm box, including by the speed regulation base, speed regulation pull head, belt upper transmission assembly and belt lower transmission assembly that are successively set on the worm shaft from below to above, transmission belt is equipped between belt upper transmission assembly and belt lower transmission assembly;

[0006] The speed regulation base is fixedly connected with the worm box, the speed regulation pull head is threadedly connected with the speed regulation base, the belt upper transmission assembly is fixedly connected with the worm shaft, and the belt lower transmission assembly is slidably connected with the belt upper transmission assembly.

[0007] The speed regulation pull head is used to adjust the distance between the belt upper transmission assembly and the belt lower transmission assembly.

[0008] Further, the belt upper transmission assembly includes a fixed tooth sleeve fixed to the worm shaft, and an upper pulley fixedly sleeved on the fixed tooth sleeve.

[0009] Further, the belt lower transmission assembly includes a movable tooth sleeve slidably connected with the worm shaft, and a lower pulley fixedly sleeved on the movable tooth sleeve.

[0010] Further, the movable tooth sleeve and the fixed tooth sleeve are slidably fixedly connected by inner splines.

[0011] Further, one side of the speed regulation pull head is provided with a pull wire, and the other side is provided with a return spring.

[0012] Further, a bearing spacer is further sleeved on the worm shaft between the speed regulation pull head and the belt lower transmission assembly, and the upper and lower sides of the bearing spacer are respectively abutted with the belt lower transmission assembly and the speed regulation pull head.

[0013] Furthermore, the top end of the worm shaft is provided with an axial support sleeve, and the outer side of the axial support sleeve is provided with a dustproof sleeve. The axial support sleeve and the worm shaft are fixed by an elastic cylindrical pin.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention adjusts the distance between the upper and lower transmission components of the belt to control the friction between the transmission belt and the upper and lower pulleys, thereby adjusting the rotation speed of the transmission belt and achieving speed regulation. Attached Figure Description

[0016] Fig. 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0017] Fig. 2 This is a side sectional view of an embodiment of the present utility model;

[0018] In the picture:

[0019] 1. Worm gearbox, 2. Worm shaft, 3. Speed ​​regulating base, 4. Speed ​​regulating pull head, 5. Fixed gear sleeve, 6. Upper pulley, 7. Moving gear sleeve, 8. Lower pulley, 9. Bearing spacer, 10. Axial support sleeve, 11. Dustproof sleeve, 12. Elastic cylindrical pin. Detailed Implementation

[0020] 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.

[0021] Example 1:

[0022] Depend on Figs. 1-2 As shown, a speed regulating mechanism for a lawnmower is provided. The speed regulating mechanism is sleeved on the worm shaft 2 of the worm gear box 1. It includes a speed regulating base 3, a speed regulating pull head 4, an upper belt transmission assembly and a lower belt transmission assembly, which are sequentially sleeved on the worm shaft 2 from bottom to top. A transmission belt is provided between the upper belt transmission assembly and the lower belt transmission assembly. The upper belt transmission assembly and the lower belt transmission assembly drive the transmission belt to rotate.

[0023] The speed regulating base 3 is fixedly connected to the worm gear box 2, and the speed regulating pull head 4 is threadedly connected to the speed regulating base 3. By rotating the speed regulating pull head 4, the distance between the speed regulating pull head 4 and the speed regulating base 3 can be adjusted, thereby changing the height of the speed regulating pull head 4 on the worm shaft 2. One side of the pull arm of the speed regulating pull head 4 is provided with a pull cable, and the other side of the pull arm is provided with a return spring. The pull cable can pull the speed regulating pull head to rotate, and the return spring can reset the speed regulating pull head.

[0024] The upper transmission assembly is fixedly connected with the worm shaft 2, and the lower transmission assembly is slidably connected with the upper transmission assembly; the worm shaft 2 drives the upper transmission assembly to rotate, and the upper transmission assembly drives the lower transmission assembly to rotate synchronously; the speed regulating pull head 4 is used for adjusting the distance between the upper transmission assembly and the lower transmission assembly, changing the friction between the upper transmission assembly, the lower transmission assembly and the transmission belt, and realizing speed regulation.

[0025] The worm shaft 2 is further sleeved with a bearing spacer 9 between the speed regulating pull head 4 and the lower transmission assembly; the upper and lower sides of the bearing spacer 9 are respectively abutted with the lower transmission assembly and the speed regulating pull head 4. When the speed regulating pull head 4 rotates and rises, the bearing spacer 9 is extruded and rises, and the bearing spacer 9 extrudes the lower transmission assembly, so that the distance between the lower transmission assembly and the upper transmission assembly is shortened.

[0026] The top end of the worm shaft 2 is provided with an axial support sleeve 10, and the outer side of the axial support sleeve 10 is provided with a dust cover 11; the axial support sleeve 10 is fixed with the worm shaft 2 through an elastic cylindrical pin 12.

[0027] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A speed regulation mechanism for a lawnmower, characterised in that: The speed regulating mechanism is sleeved on the worm shaft of the worm box, and comprises, from bottom to top, a speed regulating base, a speed regulating pull head, an upper belt transmission assembly and a lower belt transmission assembly, which are sleeved on the worm shaft in sequence, and a transmission belt is arranged between the upper belt transmission assembly and the lower belt transmission assembly; The speed regulating base is fixedly connected with the worm box, the speed regulating pull head is threadedly connected with the speed regulating base, the upper belt transmission assembly is fixedly connected with the worm shaft, and the lower belt transmission assembly is slidably connected with the upper belt transmission assembly. The speed regulating pull head is used for adjusting the distance between the upper belt transmission assembly and the lower belt transmission assembly.

2. The speed regulation mechanism for a lawnmower as claimed in claim 1, characterized in that: The upper belt transmission assembly comprises a fixed tooth sleeve fixed with the worm shaft, and an upper belt wheel fixedly sleeved on the fixed tooth sleeve.

3. A speed regulation mechanism for a lawnmower according to claim 2, characterised in that: The lower belt transmission assembly comprises a movable tooth sleeve slidably connected with the worm shaft, and a lower belt wheel fixedly sleeved on the movable tooth sleeve.

4. A speed regulation mechanism for a lawnmower as claimed in claim 3, characterized in that: The movable tooth sleeve and the fixed tooth sleeve are slidably fixedly connected through inner splines.

5. The speed regulation mechanism for a lawnmower as claimed in claim 1, characterized in that: One side of the speed regulating pull head is provided with a pull wire, and the other side is provided with a return spring.

6. The speed regulation mechanism for a lawn mower of claim 1, wherein: A bearing spacer sleeve is further sleeved on the worm shaft between the speed regulating pull head and the lower belt transmission assembly, and the upper and lower sides of the bearing spacer sleeve are respectively abutted with the lower belt transmission assembly and the speed regulating pull head.

7. The speed regulation mechanism for a lawnmower as claimed in claim 1, characterized in that: The top end of the worm shaft is provided with an axial support sleeve, the outer side of the axial support sleeve is provided with a dustproof sleeve, and the axial support sleeve and the worm shaft are fixed through an elastic cylindrical pin.

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