Miniature reverse gear control structure

Abstract

The utility model relates to a miniature reverse gear control structure which comprises a reverse gear mechanism and an advancing mechanism, and the reverse gear mechanism is composed of a first driving belt pulley, a driven belt pulley, an output belt pulley, a first tensioning mechanism and a transmission assembly. The first driving belt pulley is connected with the driven belt pulley through a first transmission belt. The driven belt pulley is in transmission with the output belt pulley through a transmission assembly. The first tensioning mechanism is composed of a first tensioning plate, a connecting piece, a swing piece, a pull rod and a gearbox, a transmission shaft and an output shaft are arranged in the gearbox, a driven belt wheel is installed on the transmission shaft, and an output belt wheel is fixed to the output shaft. The swing piece is rotationally connected with the transmission shaft, the multiple bosses arranged in a staggered mode are arranged on the swing piece and the gearbox, the tensioning state of the belt is adjusted through the synergistic effect of the pull rod and the connecting piece, the problem that a traditional reverse transmission system is unstable due to friction is solved, and the stability and reliability of the transmission system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a micro reverse control structure. BACKGROUND

[0002] Miniature rotary cultivators and domestic follow-behind mowers are small agricultural machines that are widely used in domestic gardening and small-scale agriculture. Miniature rotary cultivators usually have a small working width, typically between 40cm and 80cm, and are designed to provide efficient cultivation capabilities. However, due to the light weight of the entire machine, these machines often lack some high-end features, such as the reverse rotation function of the rotary knife. This results in their inability to meet the needs of users in some special application scenarios, especially in situations that require reverse travel.

[0003] Similarly, domestic follow-behind mowers are also commonly used for domestic lawn trimming. However, due to design limitations, these devices usually do not have a reverse function. In some situations that require reverse operation, such as turning, bypassing obstacles, etc., existing domestic follow-behind mowers often appear to be inadequate. In the existing design of miniature rotary cultivators and domestic follow-behind mowers, in order to achieve the reverse function, a complex tensioning structure system usually needs to be designed, using two sets of tensioning mechanisms to control the forward and reverse transmissions respectively. However, this traditional structure design has several defects. Especially when the machine is working, although one driven pulley is rotating in the working state, the other driven pulley, even in a relaxed state, will continue to rotate due to friction. This friction phenomenon still exists despite the transmission belt being in a relaxed state, causing the transmission system of the machine to be unstable in the reverse or stopped state, thereby increasing the risk of transmission clutch failure. SUMMARY

[0004] The utility model aims at solving the above prior art's insufficient, provide a micro reverse control structure.

[0005] A micro reverse control structure, comprising a reverse mechanism, a forward mechanism, the reverse mechanism comprising a first driving pulley, a driven pulley, an output pulley, a first tensioning mechanism, a transmission assembly, the first driving pulley and the driven pulley are connected by a first transmission belt, the driven pulley and the output pulley are connected by the transmission assembly, the first tensioning mechanism is used to control the tensioning state of the first transmission belt;

[0006] The first tensioning mechanism comprises a first tensioning plate, a connecting piece, a swing piece, a pull rod and a gear box, the gear box is rotatably connected with a transmission shaft and an output shaft, the driven pulley is installed on the transmission shaft, and the output pulley is fixedly installed on the output shaft;

[0007] The pendulum rotates and connects with the transmission shaft, the pendulum is connected with the gear box, a plurality of bosses are arranged on the contact surfaces of the pendulum and the gear box, the bosses on the pendulum and the gear box are staggered, one end of the pendulum is connected with the pull rod and one end of the connecting piece, the other end of the connecting piece is connected with one end of the first tensioning plate, the other end of the first tensioning plate is rotationally fixed, and the first tensioning plate is located near the first transmission belt.

[0008] Further, the first tensioning plate is located outside the first transmission belt.

[0009] Further, a first tensioning wheel is rotationally connected to the tensioning plate.

[0010] Further, the connecting piece is a tension spring.

[0011] Further, the transmission assembly is located in the gear box, and the transmission assembly comprises a first gear and a second gear, and the first gear and the second gear are fixedly installed on the transmission shaft and the output shaft respectively.

[0012] Further, the forward mechanism comprises a second driving pulley, an output pulley and a second tensioning mechanism, the second driving pulley and the output pulley are connected through a second transmission belt, and the second tensioning mechanism is used for controlling the tensioning state of the second transmission belt.

[0013] Further, the first driving pulley and the second driving pulley are fixedly installed on the input shaft.

[0014] Further, the gear box is of a split structure and comprises a cover and a base.

[0015] Further, at least two tension springs are arranged between the pendulum and the gear box, and the tension springs are uniformly distributed based on the connection between the pendulum and the transmission shaft.

[0016] Further, the driven pulley is rotationally connected to the transmission shaft, the driven pulley is fixedly connected with the clutch disc, and the clutch disc is fixedly connected with the transmission shaft.

[0017] Beneficial effects: compared with the prior art, the utility model has the following advantages:

[0018] The reverse operation stability is enhanced: the first tensioning mechanism accurately controls the tensioning state of the transmission belt, avoids the problems of belt relaxation or excessive friction in the traditional design, ensures the transmission stability of the machine in the reverse state, and effectively improves the reliability of the reverse operation.

[0019] Simplified design, reduced complexity: compared with the traditional complex tensioning structure system, the present application reduces the additional structure parts and reduces the overall design complexity and manufacturing cost through simple and efficient transmission assembly and tensioning mechanism design.

[0020] Enhanced comfort and convenience: As the reverse control structure can smoothly switch between forward and reverse modes, users are no longer bothered by frequent adjustments to the tensioning mechanism or dealing with belt friction issues during use, enhancing the overall user experience.

[0021] Extended service life: By optimizing tension control, the invention avoids excessive heat generation due to friction or wear caused by excessive tensioning when the belt is in a relaxed state, reducing damage to the transmission system and extending the service life of the mechanical equipment.

[0022] Wide range of applications: The micro reverse control structure is suitable for small agricultural machinery such as micro rotary cultivators and household follow-up mowers, and can meet the efficient needs of these devices for reverse functions in actual use, with strong market adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of a micro reverse control structure;

[0024] Figure 2 is an assembly diagram between the driven pulley and the forward pulley;

[0025] Figure 3 is Figure 2 is a sectional view of A-A in

[0026] Figure 4 is another angle assembly diagram between the driven pulley and the forward pulley;

[0027] Figure 5 is a schematic diagram of the swing piece;

[0028] Figure 6 is an external schematic diagram of the gear box;

[0029] Figure 7 is an assembly diagram of the first driving pulley, the second driving pulley and the input shaft;

[0030] In the figure, 1 is the input shaft, 2 is the first driving pulley, 3 is the first transmission belt, 4 is the second transmission belt, 5 is the connecting piece, 6 is the swing piece, 7 is the pull rod, 8 is the driven pulley, 9 is the transmission shaft, 10 is the first tensioning plate, 11 is the first tensioning wheel, 12 is the second tensioning mechanism, 13 is the upper cover, 14 is the base, 15 is the first gear, 16 is the second gear, 17 is the output shaft, 18 is the forward pulley, 19 is the boss, 20 is the tension spring, 21 is the clutch disc, and 22 is the second driving pulley. DETAILED DESCRIPTION

[0031] In order to deepen the understanding of the utility model, the utility model will be further described below in combination with embodiments and drawings, and the embodiments are only used to explain the utility model and do not constitute a limitation on the protection scope of the utility model.

[0032] A miniature reverse control structure, comprising a reverse mechanism and a forward mechanism, the reverse mechanism comprising an input shaft 1, a first driving pulley 2, a driven pulley 8, an output pulley 17, a first tensioning mechanism 10 and a transmission assembly 9, the first driving pulley 2 being connected with the driven pulley 8 through a first transmission belt 3, the driven pulley 8 being connected with the output pulley 17 through the transmission assembly 9, and the first tensioning mechanism 10 being used for controlling the tensioning state of the first transmission belt 3.

[0033] The first tensioning mechanism 10 comprises a first tensioning plate 10, a connecting piece 5, a swing piece 6, a pull rod 7 and a gear box 9, the gear box 9 being rotatably connected with a transmission shaft 9 and an output shaft 17, the driven pulley 8 being mounted on the transmission shaft 9, and the output pulley 17 being fixedly mounted on the output shaft 17.

[0034] The swing piece 6 is rotatably connected with the transmission shaft 9, the swing piece 6 being connected with the gear box 9, a plurality of bosses 19 being respectively arranged on the contact surfaces of the swing piece 6 and the gear box 9, the bosses 19 on the swing piece 6 and the gear box 9 being staggered, one end of the swing piece 6 being connected with the pull rod 7 and one end of the connecting piece 5, the other end of the connecting piece 5 being connected with one end of the first tensioning plate 10, the other end of the first tensioning plate 10 being rotationally fixed, and the first tensioning plate 10 being located near the first transmission belt 3.

[0035] In the embodiment, the first tensioning plate 10 is located outside the first transmission belt 3.

[0036] In the embodiment, the first tensioning plate 10 is rotatably connected with a first tensioning wheel 11.

[0037] In the embodiment, the connecting piece 5 is a tension spring 20.

[0038] In the embodiment, the transmission assembly 9 is located in the gear box 9, the transmission assembly 9 comprising a first gear 15 and a second gear 16, the first gear 15 and the second gear 16 being respectively fixedly mounted on the transmission shaft 9 and the output shaft 17.

[0039] In the embodiment, the forward mechanism comprises a second driving pulley 22, an output pulley 17 and a second tensioning mechanism 12, the second driving pulley 22 being connected with the output pulley 17 through a second transmission belt 4, and the second tensioning mechanism 12 being used for controlling the tensioning state of the second transmission belt 4.

[0040] In the embodiment, the first driving pulley 2 and the second driving pulley 22 are both fixedly mounted on the input shaft 1.

[0041] In the present embodiment, the gear box 9 is a split structure, which comprises a cover 13 and a base 14.

[0042] In the present embodiment, at least two tension springs 20 are arranged between the pendulum 6 and the gear box 9, and the tension springs 20 are uniformly distributed based on the connection between the pendulum 6 and the transmission shaft 9.

[0043] In the present embodiment, the driven pulley 8 is rotationally connected to the transmission shaft 9, and the driven pulley 8 is fixedly connected to the clutch disc 21, which is fixedly connected to the transmission shaft 9.

[0044] Working principle: since the first driving pulley 2 and the second driving pulley 22 are both driven by the input shaft 1, the first tensioning device 10 and the second tensioning device 12 cannot work at the same time, that is, the first transmission belt 3 and the second transmission belt 4 cannot be simultaneously tensioned, which will cause the forward mechanism and the reverse mechanism to work at the same time, resulting in a fault;

[0045] Due to the first gear 15 and the second gear 16, the rotation directions of the driven pulley 8 and the output pulley 17 are always opposite.

[0046] When in the forward state, the second tensioning mechanism 12 works, that is, the second transmission belt 4 is tensioned, and the transmission between the second driving pulley 22 and the output pulley 17 is realized, at this time, the direction of the input shaft 1 is the same as that of the output pulley 17;

[0047] When in the reverse state, the first tensioning mechanism 10 works, that is, the first transmission belt 3 is tensioned, and the process is as follows:

[0048] Pulling the pull rod 7 to rotate the pendulum 6 around the transmission shaft 9, due to the cooperation of the pendulum 6 and the boss 19 on the gear box 9, the pendulum 6 drives the gear box 9 to rotate around the output shaft 17, and the transmission shaft 9 where the driven pulley 8 is located is located at the eccentric position of the rotation of the gear box 9, so that the driven pulley 8 does a circular motion, thereby expanding the distance between the driven pulley 8 and the first driving pulley 2, and then tensioning the first transmission belt 3, at the same time, the pendulum 6 pulls up the first tensioning plate 10 through the connecting piece 5, so that the tensioning wheel 11 presses the first transmission belt 3, at this time, the first transmission belt 3 is in a tensioned state, and the first driving pulley 2 and the driven pulley 8 realize transmission, at this time, the direction of the output pulley 17 is opposite to that of the input shaft 1.

[0049] The above only describes the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A miniature reverse gear control structure, characterized in that, It includes a reverse gear mechanism and a forward gear mechanism. The reverse gear mechanism includes a first driving pulley, a driven pulley, an output pulley, a first tensioning mechanism, and a transmission assembly. The first driving pulley and the driven pulley are connected by a first transmission belt, and the driven pulley and the output pulley are connected by a transmission assembly. The first tensioning mechanism is used to control the tension of the first transmission belt. The first tensioning mechanism includes a first tensioning plate, a connector, a swing element, a pull rod, and a gearbox. The gearbox is rotatably connected to a drive shaft and an output shaft. The driven pulley is mounted on the drive shaft, and the output pulley is fixedly mounted on the output shaft. The aforementioned ornament is rotatably connected to the drive shaft and connected to the gearbox. Multiple bosses are provided on the contact surfaces of the ornament and the gearbox, and the bosses on the ornament and the gearbox are staggered. One end of the ornament is connected to one end of the pull rod and the connecting piece, and the other end of the connecting piece is connected to one end of the first tensioning plate. The other end of the first tensioning plate is rotatably fixed and is located near the first drive belt.

2. The miniature reverse gear control structure according to claim 1, characterized in that, The first tension plate is located on the outside of the first drive belt.

3. A miniature reverse gear control structure according to claim 1 or 2, characterized in that, The tensioning plate is rotatably connected to the first tensioning wheel.

4. The miniature reverse gear control structure according to claim 1, characterized in that, The connecting component is a tension spring.

5. A miniature reverse gear control structure according to claim 1, characterized in that, The transmission assembly is located inside the gearbox and includes a first gear and a second gear, which are fixedly mounted on the drive shaft and the output shaft, respectively.

6. The miniature reverse gear control structure according to claim 1, characterized in that, The forward mechanism includes a second drive pulley, an output pulley, and a second tensioning mechanism. The second drive pulley and the output pulley are connected by a second transmission belt. The second tensioning mechanism is used to control the tension of the second transmission belt.

7. A miniature reverse gear control structure according to claim 6, characterized in that, Both the first and second drive pulleys are fixedly mounted on the input shaft.

8. A miniature reverse gear control structure according to claim 1, characterized in that, The gearbox is a split structure, which includes a cover and a base.

9. A miniature reverse gear control structure according to claim 1, characterized in that, At least two tension springs are provided between the ornament and the gearbox, and the tension springs are evenly distributed at the connection between the ornament and the drive shaft.

10. A miniature reverse gear control structure according to claim 1, characterized in that, The driven pulley is rotatably connected to the drive shaft, the driven pulley is fixedly connected to the clutch disc, and the clutch disc is fixedly connected to the drive shaft.

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