A self-propelled vehicle and golf bag cart and lawn mower having the same

Abstract

The utility model provides a kind of self-propelled vehicle and golf bag vehicle and mower with it. The self-propelled vehicle includes driving device;Transmission assembly, including gear set and transmission shaft, the gear set is connected with the output shaft of driving device transmission, the third gear of gear set rotates and is set on the transmission shaft;A pair of clutch assembly, set on the transmission shaft, respectively located the axial both sides of third gear, the clutch assembly includes transmission part, fixed on the transmission shaft, located the axial outside of third gear;Centrifugal flinger, axial limit between third gear and transmission part;Reset spring, fixed on the centrifugal flinger.The self-propelled vehicle provided by the utility model adopts double clutch assembly, compared with single side clutch entire clutch reset process is faster, reliable, stable, can improve the thoroughness and stability of clutch, to reduce the risk of coasting, parking instability, and the risk of appearing jitter or slip in driving.

Description

Technical Field

[0001] This utility model relates to the field of self-propelled vehicle technology, specifically to a self-propelled vehicle and a golf bag cart and lawnmower having the same. Background Technology

[0002] The self-propelled unit is the core drive component of self-propelled lawnmowers, golf bag carts, and other similar equipment. Its function is to transmit power from the engine or motor to the wheels, enabling the equipment to move automatically. Existing self-propelled units mainly rely on a clutch mechanism to engage and disengage power, allowing the lawnmower or golf bag cart to move or stop automatically.

[0003] Currently, in existing technical solutions, most self-propelled vehicles only have a single-sided clutch device. Single-sided clutch devices often have the following disadvantages: 1. A single-sided clutch makes it difficult to achieve a fully engaged state. When precise speed control is required, such as when driving at low speeds or making minor adjustments, problems such as the vehicle rolling backward or unstable parking may occur. 2. Single-sided clutches have poor stability and are prone to shaking or slipping in complex terrain or at high speeds.

[0004] Therefore, there is an urgent need in this field to develop a new type of self-propelled device that can achieve fast, reliable, and smooth engagement and disengagement of the clutch and transmission devices, thereby improving the overall performance and safety level of self-propelled equipment. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a self-propelled vehicle and a golf bag cart and lawnmower with it, which can avoid the problems of easy slippage, unstable parking and easy shaking or sliding that exist with single-sided clutch.

[0006] To achieve the above and other objectives, this utility model is implemented through the following technical solution: As a first aspect, this utility model proposes a self-propelled device, including a drive unit; a transmission assembly including a gear set and a transmission shaft, the gear set being tractively connected to the output shaft of the drive unit, the third-stage gear of the gear set being rotatably mounted on the transmission shaft; the transmission shaft being parallel to the output shaft; a pair of clutch assemblies mounted on the transmission shaft, respectively located on both axial sides of the third-stage gear, each clutch assembly including a transmission element fixedly mounted on the transmission shaft, located axially outside the third-stage gear; a centrifugal throwing block axially limited between the third-stage gear and the transmission element; a return spring fixed to the centrifugal throwing block; when the drive unit starts, the third-stage gear rotates, causing the centrifugal throwing block to rotate outward under centrifugal force until it engages with the transmission element, thereby driving the transmission shaft to rotate; when the drive unit stops, the return spring causes the centrifugal throwing block to return to its original position and disengage from the transmission element.

[0007] In one embodiment, the third-stage gear includes a central portion with external tooth surfaces and a first mounting portion and a second mounting portion extending axially outward from the central portion; both the first mounting portion and the second mounting portion are provided with mounting grooves; the centrifugal throwing block is axially limited within the mounting groove by a first pin.

[0008] In one embodiment, when the centrifugal slinger rotates and is thrown outward under the action of centrifugal force, at least one end face of the centrifugal slinger protrudes from the first mounting part / second mounting part, and a stepped surface that mates with the end face is formed radially inward on the inner wall of the transmission member, and the end face engages with the stepped surface.

[0009] In one embodiment, a through hole is provided in the middle part, the through hole communicates with the mounting groove, and the first pin passes through the through hole; pressure plates are fixedly connected to both ends of the first pin, and the two pressure plates are axially fixed on the transmission shaft; the centrifugal throwing block is axially limited between the pressure plates and the middle part.

[0010] In one embodiment, the reset spring is a ring compression spring, disposed between the pressure plate and the centrifugal throwing block.

[0011] In one embodiment, the reset spring is a tension spring, with hooks at both ends fixedly connected to the centrifugal throwing block and the third-stage gear, respectively.

[0012] In one embodiment, the gear set includes a first-stage gear, a second-stage gear, and a third-stage gear. The inner surface of the first end of the first-stage gear meshes with the driving gear on the output shaft. The outer tooth surface of the first end of the second-stage gear meshes with the outer tooth surface of the second end of the first-stage gear, and the outer tooth surface of the second end meshes with the outer tooth surface of the third-stage gear.

[0013] In one embodiment, the drive shaft includes a first drive shaft and a second drive shaft, which are coaxially arranged; the third-stage gear is sleeved on the connection portion of the first drive shaft and the second drive shaft, and a pair of clutch components are respectively arranged on the first drive shaft and the second drive shaft.

[0014] As a second aspect, the present invention proposes a golf bag cart, including a self-propelled vehicle as described in the first aspect.

[0015] As a third aspect, this utility model proposes a lawnmower, including a self-propelled unit as described in the first aspect.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The self-propelled device provided by this utility model adopts a dual-clutch assembly, which is faster, more reliable and smoother in the entire clutch reset process compared with a single-sided clutch. It can improve the thoroughness and stability of clutch engagement, thereby reducing the risk of vehicle slippage, unstable parking and vibration or slippage during driving. 2. This utility model uses centrifugal force to achieve the engagement of the centrifugal slinger and the transmission component, and uses a return spring to contact the engagement of the centrifugal slinger and the transmission component. The process is simple, the clutch assembly has fewer parts, is easy to install, has lower cost, and the clutch control is more stable. 3. The design of fixing the pressure plate axially on the transmission shaft in this utility model can prevent the third-stage gear from undergoing axial displacement on the transmission shaft; 4. In this utility model, the transmission shaft adopts a first transmission shaft and a second transmission shaft coaxially arranged, and the gear set adopts a three-stage speed change gear, which can realize speed change clutch; 5. The drive device of this utility model adopts a brushed DC motor, which can provide stable power output. In addition, each gear adopts a new helical gear material, which makes the power transmission more stable and the noise is lower. 6. The self-propelled device provided by this utility model is applicable to golf carts and lawnmowers. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural schematic of a self-propelled device according to this utility model.

[0018] Figure 2 This diagram shows the installation of the drive shaft, third-stage gear, and clutch assembly in this invention (the right-side drive component is hidden).

[0019] Figure 3 The image shown is a cross-sectional view of the first embodiment of this utility model.

[0020] Figure 4 The diagram shown is an exploded view of the first embodiment of this utility model.

[0021] Figure 5 The diagram shown is a structural schematic of the third-stage gear in the first embodiment of this utility model.

[0022] Figure 6 The diagram shown is a structural schematic of the centrifugal blower in the first embodiment of this utility model.

[0023] Figure 7 The diagram shown is a structural schematic of the transmission component in the first embodiment of this utility model.

[0024] Figure 8 The diagram shown is a schematic diagram of the installation of the pressure plate in the first embodiment of this utility model.

[0025] Figure 9 The image shown is a cross-sectional view of the second embodiment of this utility model.

[0026] In the diagram: 10, Gearbox; 10a, Gearbox bottom shell; 10b, Gearbox top cover; 101 and 102, Gear mounting protrusions; 20, Drive unit; 21, Output shaft; 22, Drive gear; 31, Transmission shaft; 311, First transmission shaft; 312, Second transmission shaft; 32, First stage gear; 33, Second stage gear; 34, Third stage gear; 341, Middle section; 3411, Through hole; 342, First mounting part; 343, Second... Mounting section; 344, Mounting slot; 40, Clutch assembly; 41, Centrifugal slinger; 411, Eccentric through hole; 412, Mounting hole; 413, End face; 42, Pressure plate; 421, Fixing slot; 43, Return spring; 44, Transmission component; 441, Stepped surface; 45, First pin; 46, Second pin; 51, Bearing; 52, Locating pin; 53, Snap ring; 54, Washer; 55, Retaining ring; 61, First mounting shaft; 62, Second mounting shaft. Detailed Implementation

[0027] Please see Figures 1-9 The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “a,” “an,” or “the,” as used herein, do not indicate a limitation of quantity, but merely indicate the presence of at least one. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The numbering of components in this specification, such as “first,” “second,” etc., is solely for distinguishing the described objects and has no sequential or technical meaning. The term “connection,” unless otherwise specified, includes both direct and indirect connections.

[0030] To avoid confusion with this utility model, some technical features known in the art have not been described.

[0031] like Figures 1-4As shown, this embodiment provides a self-propelled device, including a drive unit 20, a transmission assembly, and a clutch assembly 40. The transmission assembly includes a gear set and a drive shaft 31. The gear set is connected to the output shaft 21 of the drive unit 20 via a drive gear 22. The third-stage gear 34 of the gear set is sleeved on the drive shaft 31. The drive shaft 31 is parallel to the output shaft 21. The clutch assembly 40 is sleeved on the drive shaft 31 via a bearing 51, and two clutch assemblies 40 are symmetrically arranged on both axial sides of the third-stage gear 34. Each clutch assembly 40 includes at least a centrifugal sling block 41, a return spring 43, and a transmission component 44. The transmission component 44 is fixedly mounted on the drive shaft 31 and located axially outside the third-stage gear 34. The centrifugal sling block 41 is axially limited between the third-stage gear 34 and the transmission component 44. The return spring 43 is fixed on the centrifugal sling block 41. When the drive device 20 is started, the third-stage gear 34 rotates, causing the centrifugal sling block 41 to rotate outward under the action of centrifugal force until it engages with the transmission component 44 (at this time, the return spring 43 is compressed or stretched and has elastic force), thereby driving the transmission shaft 31 to rotate and realizing power transmission; when the drive device 20 stops, the return spring 43 loses pressure or tension and drives the centrifugal sling block 41 to reset under the action of elastic force, so that the centrifugal sling block 41 disengages from the transmission component 44 and realizes emergency stop.

[0032] Specifically, please combine Figure 3 and Figure 5 The third-stage gear 34 includes a central portion 341 with external tooth surfaces and a first mounting portion 342 and a second mounting portion 343 extending axially outward from the central portion 341. Each of the first mounting portion 342 and the second mounting portion 343 has two mounting grooves 344 for accommodating two centrifugal blocks 41. The central portion 341 has two through holes 3411, which communicate with the two mounting grooves 344 respectively. A first pin 45 passes through each through hole 3411. The clutch assembly 40 includes centrifugal blocks 41, a pressure plate 42, a return spring 43, and a transmission component 44. Each clutch assembly 40 has two centrifugal blocks 41. The centrifugal blocks 41 are axially limited within the mounting grooves 344 by the first pin 45. The pressure plate 42 is disposed on the axial outer side of the centrifugal throwing block 41 and is fixed to both axial sides of the third stage gear 34 by the first pin 45. The gap between the pressure plate 42 and the third stage gear 34 is greater than the thickness of the centrifugal throwing block 41, so that the centrifugal throwing block 41 can move axially between the pressure plate 42 and the third stage gear 34. The return spring 43 is at least fixedly connected to the centrifugal throwing block 41. The transmission component 44 is fixedly installed on the transmission shaft 31 and is located on the axial outer side of the pressure plate 42.

[0033] Please combine Figure 6 The centrifugal throwing block 41 is provided with an eccentric through hole 411, and the centrifugal throwing block 41 is installed on the first pin 45 through the eccentric through hole 411.

[0034] Please combine Figure 8 The pressure plate 42 is provided with a fixing groove 421 for fixing the first pin 45. The pressure plate 42 and the third gear 34 are fixedly connected through the fixing groove 421 and the first pin 45.

[0035] Please combine Figure 6 and Figure 9 When the centrifugal throwing block 41 rotates and is thrown outward under the action of centrifugal force, at least one end face 413 of the centrifugal throwing block 41 protrudes from the first mounting part 342 / second mounting part 343. A stepped surface 441 is formed radially inward on the inner wall of the transmission member 44 to cooperate with the end face 413 of the centrifugal throwing block 41, so that the end face 413 can mesh with the stepped surface 441 of the transmission member 44, thereby realizing that the transmission member 44 and the third stage gear 34 rotate synchronously.

[0036] like Figure 3 As shown, in one embodiment, the return spring 43 can be a ring compression spring, pressing against the pressure plate 42 and the centrifugal throwing block 41. Please refer to... Figure 5 The centrifugal throwing block 41 is provided with a mounting hole 412 for fixing one end of the second pin 46. It should be noted that both the second pin 46 and the centrifugal throwing block 41 are made of metal, therefore, the second pin 46 and the centrifugal throwing block 41 can also be integrally formed. The return spring 43 is fixedly connected to the other end of the second pin 46, thereby fixing the centrifugal throwing block 41 to the return spring 43. When the centrifugal throwing block 41 is thrown out, the return spring 43 is compressed to obtain a return force.

[0037] It should be noted that in some embodiments, the return spring 43 can also be a tension spring, and the mounting hole 412 on the centrifugal throwing block 41 is used to fix one end of the tension spring with a hook, and the other end of the tension spring with a hook is installed on the third-stage gear 34. When the centrifugal throwing block 41 is thrown out, the return spring 43 is stretched to obtain a return force.

[0038] Please review Figure 1 and Figure 3The drive device 20 can be a motor, such as a brushed DC motor, to provide stable power output for the self-propelled device. The output shaft 21 of the drive device 20 extends into the gearbox 10, so that the drive gear 22 on the output shaft 21 meshes with the gear set inside the gearbox 10 to achieve power transmission. The transmission assembly and clutch assembly 40 are disposed inside the gearbox 10. The gearbox 10 may include a detachably connected gearbox bottom shell 10a and gearbox top cover 10b. The two ends of the drive shaft 31 are rotatably mounted on the gearbox bottom shell 10a and gearbox top cover 10b respectively via bearings 51; the gear set is mounted in the mounting groove formed by the gearbox bottom shell 10a and gearbox top cover 10b; the transmission component 44 is fixed to the transmission shaft 31 by a positioning pin 52, and the outer side of the transmission component 44 abuts against a retaining ring 53 and a washer 54 disposed in the annular groove of the transmission shaft 31.

[0039] In order to change the rotational speed of the drive unit 20 to meet the needs of different fields and scenarios, while ensuring that the drive unit 20 operates with optimal efficiency at high speed and maintains low noise, the gear set can be designed as a multi-stage variable speed gear meshing transmission structure, the transmission shaft 31 can be designed as a first transmission shaft 311 and a second transmission shaft 312 arranged coaxially, and the third stage gear 34 can be sleeved on the connection part of the first transmission shaft 311 and the second transmission shaft 312. A pair of clutch components 40 can be respectively arranged on the first transmission shaft 311 and the second transmission shaft 312.

[0040] Specifically, the gear set includes a first-stage gear 32, a second-stage gear 33, and a third-stage gear 34. Each gear uses a new helical gear material, resulting in more stable power transmission and lower noise. The axial directions of the first-stage gear 32, second-stage gear 33, and third-stage gear 34 are all parallel to the output shaft 21 of the drive device 20. The first end of the inner tooth surface of the first-stage gear 32 meshes with the driving gear 22; the first end of the outer tooth surface of the second-stage gear 33 meshes with the second end of the outer tooth surface of the first-stage gear 32, and the second end of the outer tooth surface meshes with the outer tooth surface of the third-stage gear 34. The axial ends of the first-stage gear 32 and the second-stage gear 33 are rotatably mounted on corresponding gear mounting protrusions 101 and 102 within the gearbox 10 via bearings.

[0041] Furthermore, in order to install the third-stage gear 34 at the upper limit of the first drive shaft 311 and the second drive shaft 312 to prevent the third-stage gear 34 from undergoing axial displacement during rotation, the two pressure plates 42 fixedly connected to the third-stage gear 34 can be axially fixed between the two positioning pins 53 of the first drive shaft 311 and the second drive shaft 312 by retaining rings 55.

[0042] like Figure 9 As shown, in the second embodiment, in order to improve the transmission effect of the gear set and increase its installation stability in the gearbox 10, the first stage gear 32 and the second stage gear 33 can be machined into hollow parts. Grooves corresponding to the installation of the first stage gear 32 and the second stage gear 33 are provided in the gearbox 10. Bearings are provided in the grooves, and the first stage gear 32 and the second stage gear 33 are rotatably installed in the corresponding grooves of the gearbox 10 by the first mounting shaft 61 and the second mounting shaft 62, respectively.

[0043] The working process of the self-propelled device provided in this embodiment is as follows: When the drive device 20 is started, the output shaft 21 drives the drive gear 22 to rotate. The rotation of the drive gear 22 sequentially drives the first gear 32, the second gear 33, and the third gear 34 to rotate. The rotation of the third gear 34 causes the centrifugal blocks 41 on both sides to rotate and move outward under the action of centrifugal force, and compress or stretch the return spring 43 until the end face 413 of the centrifugal block 41 meshes with the stepped surface 441 of the transmission member 44. At this time, the rotation of the third gear 34 can simultaneously drive the centrifugal blocks 41 and the transmission member 44 to rotate, thereby driving the first transmission shaft 311 and the second transmission shaft 312 to rotate, thus outputting the power of the drive device 20 to the external drive wheel.

[0044] When the drive device 20 stops, the drive gear 22, the first gear 32, the second gear 33, and the third gear 34 all stop. At this time, the pressure or tension at both ends of the return spring 43 is less than the spring force of the return spring 43 itself. As a result, the centrifugal throwing block 41 returns to its original position under the reset action of the return spring 43. This causes the end face 413 of the centrifugal throwing block 41 to contact and mesh with the stepped surface 441 of the transmission component 44, thereby causing the transmission shaft 31 to stop.

[0045] The self-propelled vehicle provided by this utility model adopts a dual-clutch assembly, which is faster, more reliable, and smoother in the entire clutch reset process compared to a single-sided clutch. It can improve the thoroughness and stability of clutch engagement, thereby reducing the risk of vehicle slippage, unstable parking, and vibration or slippage during driving. Centrifugal force is used to achieve the engagement of the centrifugal slinger and the transmission component, and a reset spring is used to contact the engagement of the centrifugal slinger and the transmission component. The process is simple, the clutch assembly has fewer parts, is easy to install, has lower cost, and the clutch control is more stable. This utility model is applicable to golf bag carts and lawnmowers.

[0046] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A self-propelled device, characterized in that, include Drive unit; The transmission assembly includes a gear set and a transmission shaft. The gear set is connected to the output shaft of the drive device. The third-stage gear of the gear set is rotatably mounted on the transmission shaft. The transmission shaft is arranged parallel to the output shaft. A pair of clutch assemblies are sleeved on the drive shaft and located on both sides of the axial direction of the third-stage gear. The clutch assemblies include... The transmission component is fixedly mounted on the transmission shaft and located on the axial outer side of the third-stage gear; The centrifugal sling is axially limited between the third-stage gear and the transmission component; A reset spring is fixed to the centrifugal swing block; When the drive device is started, the rotation of the third gear drives the centrifugal block to rotate outward under the action of centrifugal force until it engages with the transmission component, thereby driving the transmission shaft to rotate; when the drive device stops, the return spring drives the centrifugal block to reset and disengage from the transmission component.

2. The self-propelled device according to claim 1, characterized in that, The third-stage gear includes a central portion with external tooth surfaces and a first mounting portion and a second mounting portion extending axially outward from the central portion; both the first mounting portion and the second mounting portion are provided with mounting grooves; the centrifugal throwing block is axially limited within the mounting groove by a first pin.

3. The self-propelled device according to claim 2, characterized in that, When the centrifugal throwing block rotates and is thrown outward under the action of centrifugal force, at least one end face of the centrifugal throwing block protrudes from the first mounting part / second mounting part, and a stepped surface that mates with the end face is formed radially inward on the inner wall of the transmission member, and the end face engages with the stepped surface.

4. The self-propelled device according to claim 2, characterized in that, A through hole is provided in the middle part, which communicates with the mounting groove. The first pin passes through the through hole. Pressure plates are fixedly connected to both ends of the first pin, and the two pressure plates are axially fixed on the transmission shaft. The centrifugal throwing block is axially limited between the pressure plates and the middle part.

5. The self-propelled device according to claim 4, characterized in that, The reset spring is a ring compression spring, which is pressed against the pressure plate and the centrifugal throwing block.

6. The self-propelled device according to claim 4, characterized in that, The reset spring is a tension spring, and the hooks at both ends are fixedly connected to the centrifugal throwing block and the third-stage gear, respectively.

7. The self-propelled device according to claim 1, characterized in that, The gear set includes a first-stage gear, a second-stage gear, and a third-stage gear. The inner surface of the first end of the first-stage gear meshes with the driving gear on the output shaft. The outer tooth surface of the first end of the second-stage gear meshes with the outer tooth surface of the second end of the first-stage gear, and the outer tooth surface of the second end meshes with the outer tooth surface of the third-stage gear.

8. The self-propelled device according to claim 1, characterized in that, The drive shaft includes a first drive shaft and a second drive shaft, which are coaxially arranged; the third-stage gear is sleeved on the connection part of the first drive shaft and the second drive shaft, and a pair of clutch components are respectively arranged on the first drive shaft and the second drive shaft.

9. A golf bag cart, characterized in that, Including the self-propelled device as described in any one of claims 1 to 8.

10. A lawnmower, characterized in that, Including the self-propelled device as described in any one of claims 1 to 8.

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