Universal wheel structure and mower

Abstract

The utility model relates to the field of cutting devices, and discloses a universal wheel structure and a mower. The universal wheel structure comprises a wheel and further comprises a connecting shaft, a supporting seat and a locking assembly, the two ends of the connecting shaft are connected with the supporting seat and the wheel respectively, the locking assembly comprises a switch, a plug pin and a plug pin opening, and the switch controls the plug pin to be inserted into or pulled out of the plug pin opening. The mower comprises the universal wheel structure. According to the universal wheel structure disclosed by the utility model, the universal wheel structure is controlled to rotate directionally or universally through the locking component, so that the effect of integrating two purposes is achieved, and a user can select a rotating mode according to requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting devices, in particular to a universal wheel and a lawn mower. Background Art

[0002] Lawn mowers are widely used in daily life to trim lawns. Lawn mowers in the prior art use a fixed wheel structure and a universal wheel structure to drive the lawn mower to operate. When the lawn mower is running, the universal wheel structure adjusts the steering, and the fixed wheel structure provides driving force. Fixed wheels and universal wheels have different structures, and users usually need to purchase them separately. There is a lack of wheel structures that can be used in two ways in the market.

[0003] Based on this, the inventor proposes a universal wheel structure and a lawn mower to solve the above technical problems. Utility Model Content

[0004] In order to solve at least one aspect of the above problems, the utility model first provides a universal wheel structure, including a wheel, a connecting shaft, a support seat and a locking assembly, the two ends of the connecting shaft are respectively connected to the support seat and the wheel, the locking assembly includes a switch, a pin and a pin port, the switch controls the pin to be inserted into or pulled out of the pin port.

[0005] Optionally, the switch includes a twisting portion, a first abutting portion and a second abutting portion, two ends of the first abutting portion are respectively connected to the twisting portion and the second abutting portion, and the second abutting portion is hinged to one end of the latch.

[0006] Optionally, the angle between the twisting portion and the first abutting portion is 120-150 degrees, and the angle between the second abutting portion and the first abutting portion is 30-60 degrees.

[0007] Optionally, the switch further includes a third abutting portion, and the third abutting portion is connected to the second abutting portion.

[0008] Optionally, a spring is sleeved on the latch, a first slide groove and a second slide groove are provided in the support seat, the latch is slidably disposed in the first slide groove, the spring is slidably disposed in the second slide groove, and a limiting portion is protruding from the latch, the limiting portion limiting the sliding of the spring in the second slide groove.

[0009] Optionally, a connecting rod is further included, and a mounting groove is provided on the support seat, and two ends of the connecting rod are respectively detachably connected to one of the mounting grooves.

[0010] Optionally, the support seat is equipped with a bearing and a retaining ring, and the upper and lower sides of the bearing are respectively abutted against the retaining ring and the support seat; it also includes a fixed block located above the bearing, and the connecting shaft is provided with a pin, and the pin passes through the bearing and is connected to the fixed block to prevent the pin from detaching from the bearing.

[0011] Optionally, a turntable is provided on the connecting shaft, and at least one latch opening is provided on the turntable.

[0012] Optionally, when the wheel is in forward travel, at least one of the latch openings is arranged at a position corresponding to the latch.

[0013] Compared with the prior art, the universal wheel structure in the utility model controls the universal wheel structure to be in directional rotation or universal rotation through a locking assembly, thereby achieving a dual-purpose effect, and the user can choose the rotation mode according to needs.

[0014] In addition, the utility model provides a lawn mower, comprising the universal wheel structure as described above.

[0015] Compared with the prior art, the lawn mower of the present invention has the same advantages as the universal wheel structure described above over the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional assembly diagram of a universal wheel structure according to an embodiment of the present application;

[0017] Figure 2 is a cross-sectional view of an embodiment A of the present application;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of a locking assembly according to an embodiment of the present application;

[0019] Figure 4 A bottom view of a support base according to an embodiment of the present application;

[0020] Figure 5 This is a schematic structural diagram of a support base from another angle according to an embodiment of the present application;

[0021] Figure 6 This is a schematic structural diagram of a connecting shaft, a bearing, a retaining ring, and a fixing block according to an embodiment of the present application;

[0022] Figure 7 This is a structural schematic diagram of a lawn mower according to an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 100. universal wheel structure; 1. wheel; 2. connecting shaft; 21. turntable; 211. latch hole; 22. pin; 3. support seat; 31. first slide slot; 32. second slide slot; 33. mounting slot; 34. connecting rod; 35. accommodating chamber; 351. first accommodating slot; 352. second accommodating slot; 36. top cover; 4. locking assembly; 41. switch; 411. twisting part; 412. first abutting part; 413. second abutting part; 414. third abutting part; 42. latch; 421. limiting part; 43. spring; 5. bearing; 6. retaining ring; 7. fixing block; 200. lawn mower. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0028] The utility model embodiment provides a universal wheel structure, combined with Figures 1 to 7 As shown, a universal wheel structure 100 includes a wheel 1, a connecting shaft 2, a support seat 3 and a locking assembly 4, wherein the two ends of the connecting shaft 2 are respectively connected to the support seat 3 and the wheel 1, and the locking assembly 4 includes a switch 41, a latch 42 and a latch port 211, wherein the switch 41 controls the latch 42 to be inserted into or pulled out of the latch port 211. The switch 41 is preferably installed above the support seat 3, so that the user can easily toggle the switch 41, and the latch 42 is preferably inserted into the support seat 3, so that the internal space of the support seat 3 is effectively utilized, external stains can be avoided, and parts wear can be reduced. In addition, the latch 42 can also be movably arranged on the connecting shaft 2, the switch 41 is arranged below the connecting shaft 2, and the latch port 211 is arranged on the support seat 3, and the directional rotation or universal rotation of the wheel 1 is realized by controlling the latch 42 to be inserted into or pulled out of the latch port 211 by the switch 41.

[0029] In this embodiment, the connecting shaft 2 is a curved structure, and the top end of the connecting shaft 2 is rotatably connected to the support seat 3, and the rotation of the connecting shaft 2 drives the rotation direction of the wheel 1. When the latch 42 is inserted into the latch port 211, the turntable 21 cannot rotate, resulting in the connecting shaft 2 also cannot rotate, thereby forming a locked state, and the wheel 1 can only rotate in a certain direction. When the latch 42 is pulled out of the latch port 211, the turntable 21 is unlocked and can rotate freely, so the connecting shaft 2 can drive the wheel 1 to rotate in all directions.

[0030] The switch 41 includes a twisting portion 411, a first abutting portion 412, and a second abutting portion 413. The two ends of the first abutting portion 412 are respectively connected to the twisting portion 411 and the second abutting portion 413. The second abutting portion 413 is hinged to one end of the latch 42. The twisting portion 411 provides a lever point for the user. The user drives the switch 41 to rotate clockwise or counterclockwise relative to the latch 42 by pulling the twisting portion 411. In this embodiment, the twisting portion 411 is a U-shaped structure, and the two ends of the U-shaped structure are respectively fixedly connected to the first abutting portion 412.

[0031] The angle between the twisting portion 411 and the first abutting portion 412 is 120-150 degrees, and the angle between the second abutting portion 413 and the first abutting portion 412 is 30-60 degrees. Preferably, the angle between the twisting portion 411 and the first abutting portion 412 is 135 degrees. The angle between the second abutting portion 413 and the first abutting portion 412 is 45 degrees. When the angle between the twisting portion 411 and the first abutting portion 412 is less than 120 or greater than 150 degrees, it is inconvenient for the user to borrow force from the twisting portion 411. When the angle between the second abutting portion 413 and the first abutting portion 412 is less than 30 degrees, the switch 41 cannot rotate smoothly; when it is greater than 60 degrees, the abutment effect between the switch 41 and the latch 42 will be unstable.

[0032] A projection of the first abutting portion 412 in the horizontal direction and a projection of the third abutting portion 414 in the horizontal direction are perpendicular to each other.

[0033] The switch 41 further includes a third abutting portion 414, which is connected to the second abutting portion 413. When the latch 42 is inserted into the latch opening 211, the third abutting portion 414 abuts against the upper surface of the support seat 3 to limit and fix the rotation path of the switch 41.

[0034] The latch 42 is sleeved with a spring 43. The support seat 3 is provided with a first slide groove 31 and a second slide groove 32. The latch 42 is slidably disposed in the first slide groove 31, and the spring 43 is slidably disposed in the second slide groove 32. A limiting portion 421 is convexly disposed on the latch 42, and the limiting portion 421 limits the sliding movement of the spring 43 in the second slide groove 32. In this embodiment, the limiting portion 421 is protruding outwardly from the side wall of the latch 42, and the spring 43 is located above the limiting portion 421. When the latch 42 moves upward and drives the limiting portion 421 to move upward, the limiting portion 421 squeezes the bottom of the spring 43, so that the spring 43 is elastically deformed in the second slide groove 32. Under the simultaneous force of the spring 43 and the switch 41, the latch 42 is fixedly pulled out above the latch port 211. When the latch 42 moves downward and drives the limiting portion 421 to move downward, the pressing of the limiting portion 421 on the spring 43 is gradually relaxed, and the spring 43 gradually returns to its original state. The latch 42 is inserted into the latch opening 211 under its own gravity and the force applied by the spring 43.

[0035] The universal wheel structure 100 further includes a connecting rod 34, and the support seat 3 is provided with a mounting groove 33, and the two ends of the connecting rod 34 are respectively detachably connected to one of the mounting grooves 33. In this embodiment, the connecting rod 34 is fixed to the support seat 3 by screws and nuts, and the screws pass through the mounting groove 33 and the connecting rod 34 at the same time. By connecting the two support seats 3 to the two ends of the connecting rod 34 respectively, the two universal wheel structures 100 can be linked.

[0036] The support seat 3 is provided with a bearing 5 and a retaining ring 6, and the upper and lower sides of the bearing 5 are respectively in contact with the retaining ring 6 and the support seat 3; and further includes a fixing block 7 located above the bearing 5, and the connecting shaft 2 is provided with a pin 22, and the pin 22 passes through the bearing 5 and is connected with the fixing block 7 to prevent the pin 22 from being separated from the bearing 5. The support seat 3 is provided with an inwardly recessed receiving cavity 35, and the receiving cavity 35 is coaxially provided with a first receiving groove 351 and a second receiving groove 352, the bearing 5 is received in the first receiving groove 351, and the retaining ring 6 is received in the second receiving groove 352. In this embodiment, the fixing block 7 is a nut, and is threadedly connected with the pin 22, and the nut contacts the upper surface of the bearing, ensuring that the pin 22 will not fall out of the bearing 5 downward, thereby ensuring the firmness of the connection between the connecting shaft 2 and the support seat 3. The pin 22 is fixed above the bearing 5 by a nut, and the retaining ring 6 is installed above the bearing 5 to further limit the bearing 5. After the bearing 5 is limited, the pin 22 can rotate freely in the bearing 5 to improve the rotation efficiency of the connecting shaft 2, so that the wheel 1 has better flexibility when used as a universal wheel.

[0037] The connecting shaft 2 is provided with a rotating disk 21, and at least one latch hole 211 is provided on the rotating disk 21. In this embodiment, the latch hole 211 is circular, and the diameter of the latch hole 211 is larger than the cross-sectional diameter of the latch 42. A guide surface is provided at one end of the latch 42 close to the latch hole 211, and the guide surface provides a guide for the latch 42 to be inserted into the latch hole 211. Multiple latch holes 211 can be provided on the rotating disk 21, and when the user inserts the latch 42 into different latch holes 211, the rotation direction of the wheel 1 is different.

[0038] When the wheel 1 is in forward travel, at least one of the latch openings 211 is set at a position corresponding to the latch 42. The forward travel includes the front or rear. Preferably, the latch opening 211 is installed at a position corresponding to the latch 42 when the wheel 1 is in the front. This arrangement can make use of the automatic straightening function of the universal wheel when the lawn mower moves forward, so that the latch opening 211 corresponds to the position of the latch 42, and the latch 42 is automatically inserted into the latch opening 211 by the thrust of the spring 43 in the unlocked state, thereby switching from the universal wheel to the fixed wheel. This arrangement makes the operation simpler and more convenient, reduces the operator's manual intervention, and improves the efficiency of the lawn mower and the smoothness of operation.

[0039] The support seat 3 is also provided with a top cover 36, and the top cover 36 is provided above the pin 22. A card block is protruded downward from the edge of the top cover 36, and a card slot matching the card block is provided in the accommodating cavity 35. The top cover 36 can be detachably mounted on the support seat 3 through the cooperation between the card block and the card slot, and the top cover 36 plays a dustproof role.

[0040] A lawn mower comprises any one of the universal wheel structures 100 described above. Figure 7 As shown, in this embodiment, the lawn mower is equipped with two universal wheel structures 100 and two fixed wheel structures. In actual application, the lawn mower is equipped with at least one universal wheel structure 100.

[0041] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A universal wheel structure, comprising a wheel (1), characterized in that: The invention also comprises a connecting shaft (2), a supporting seat (3) and a locking assembly (4), wherein two ends of the connecting shaft (2) are respectively connected to the supporting seat (3) and the wheel (1), and the locking assembly (4) comprises a switch (41), a latch (42) and a latch opening (211), and the switch (41) controls the latch (42) to be inserted into or removed from the latch opening (211).

2. The universal wheel structure according to claim 1, characterized in that: The switch (41) comprises a twisting portion (411), a first abutting portion (412) and a second abutting portion (413); two ends of the first abutting portion (412) are respectively connected to the twisting portion (411) and the second abutting portion (413); and the second abutting portion (413) is hinged to one end of the latch (42).

3. The universal wheel structure according to claim 2, characterized in that: The angle between the twisting portion (411) and the first abutting portion (412) is 120-150 degrees, and the angle between the second abutting portion (413) and the first abutting portion (412) is 30-60 degrees.

4. The universal wheel structure according to claim 2, characterized in that: The switch (41) further comprises a third abutting portion (414), wherein the third abutting portion (414) is connected to the second abutting portion (413).

5. The universal wheel structure according to claim 1, characterized in that: The latch (42) is sleeved with a spring (43), the support seat (3) is provided with a first slide groove (31) and a second slide groove (32), the latch (42) is slidably arranged in the first slide groove (31), the spring (43) is slidably arranged in the second slide groove (32), and a limiting portion (421) is convexly provided on the latch (42), and the limiting portion (421) limits the sliding of the spring (43) in the second slide groove (32).

6. The universal wheel structure according to claim 1, characterized in that: It also comprises a connecting rod (34), the supporting seat (3) is provided with a mounting groove (33), and the two ends of the connecting rod (34) are respectively detachably connected to one of the mounting grooves (33).

7. The universal wheel structure according to claim 1, characterized in that: The support seat (3) is provided with a bearing (5) and a retaining ring (6), and the upper and lower sides of the bearing (5) are respectively in contact with the retaining ring (6) and the support seat (3); the support seat (3) also includes a fixing block (7) located above the bearing (5), and the connecting shaft (2) is provided with a pin (22), and the pin (22) passes through the bearing (5) and is connected to the fixing block (7) to prevent the pin (22) from detaching from the bearing (5).

8. The universal wheel structure according to claim 1, characterized in that: A rotating disk (21) is provided on the connecting shaft (2), and at least one latch opening (211) is provided on the rotating disk (21).

9. The universal wheel structure according to claim 8, characterized in that: When the wheel (1) is in forward travel, at least one of the latch holes (211) is arranged at a position corresponding to the latch (42).

10. A lawn mower, characterized in that: A universal wheel structure comprising any one of claims 1-9.

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