Supporting wheel return device

Abstract

The utility model discloses a supporting wheel return device, and relates to the technical field of return devices. The device comprises a supporting wheel and a supporting wheel mounting rod, an eccentric wheel is arranged on the supporting wheel, and the supporting wheel is mounted at the lower end of the supporting wheel mounting rod through the eccentric wheel and a first bearing located in the eccentric wheel; a buckle clamping plate is arranged on the supporting wheel mounting rod above the eccentric wheel in a sleeving manner, one end of the buckle clamping plate is connected with a return plate which horizontally and freely rotates, the other end of the buckle clamping plate is connected with a return spring, and the other end of the return spring is connected to the return plate; a second bearing is arranged at the bottom of the return plate, and the bearing face of the second bearing is tightly attached to the outer edge of the eccentric wheel. By mainly utilizing the characteristic that the distances from the rotation center of the eccentric wheel to all points on the outer diameter of the wheel are different, the return spring pulls the return plate, the bearing II on the return plate presses the eccentric wheel to enable the supporting wheel to finally stop at the position with the shortest distance from the rotation center to the outer diameter of the wheel, and the supporting wheel has the automatic return function.

Description

Technical Field

[0001] The utility model relates to the technical field of return devices, in particular to a return device for a supporting wheel of a snowplow. Background Art

[0002] Snowplows play a vital role in winter road maintenance, efficiently clearing snow and ensuring smooth traffic. However, with the increasing complexity of urban roads and increasing snow removal requirements, snowplow design faces increasing challenges. This is particularly true with the support wheels. Due to space constraints, the wheel turning radius is often shortened. While this improves vehicle maneuverability, it also presents a series of technical challenges. For example, when a snowplow turns or reverses while clearing snow, if the support wheels form a large angle with the vehicle's forward direction, the short turning radius prevents the wheels from automatically returning to their original position solely through friction with the ground. This not only affects snow removal efficiency but can also lead to abnormal wear on the support wheel tires, increasing maintenance costs. To address this return problem, some snowplows use manual return, requiring the operator to use a joystick or button to assist in the wheel return. However, this method not only increases operational complexity but can also pose safety risks due to improper operation.

[0003] In view of the above problems, it is particularly important to develop an automatic return structure suitable for support wheels with small turning radius. Summary of the Invention

[0004] The utility model provides a supporting wheel return device, which can solve the problem that the existing supporting wheels with a small turning radius are difficult to return automatically during snow removal operations.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] It includes a support wheel and a support wheel mounting rod, the support wheel is provided with an eccentric wheel, and the support wheel is mounted on the lower end of the support wheel mounting rod through the eccentric wheel and a bearing located inside the eccentric wheel; a snap clamp is sleeved on the support wheel mounting rod above the eccentric wheel, one end of the snap clamp is connected to a return plate that can rotate horizontally, the other end of the snap clamp is connected to a return spring, and the other end of the return spring is connected to the return plate; a bearing 2 is provided at the bottom of the return plate, and the bearing surface of the bearing 2 is in close contact with the outer edge of the eccentric wheel.

[0007] In the above technical solution, a more specific technical solution may also be: the second bearing is a ball bearing.

[0008] Furthermore, the second bearing is mounted on the bottom of the return plate through a bolt and nut.

[0009] Furthermore, the bearing 1 is a thrust roller and needle roller combination bearing.

[0010] Furthermore, the snap-fit ​​clamp is mounted on the support wheel mounting rod via bolts and nuts.

[0011] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0012] 1. The utility model mainly utilizes the characteristic that the distance from the rotation center to each point on the outer diameter of the eccentric wheel is different. By pulling the return plate with the return spring, the second bearing on the return plate presses the eccentric wheel so that the support wheel finally stops at the position with the shortest distance from the rotation center to the outer diameter of the wheel, and the support wheel automatically returns to its original position.

[0013] 2. The support wheel of the utility model is connected to the support wheel mounting rod through bearing 1, thereby ensuring that the support wheel with eccentric wheel can rotate freely on the support wheel mounting rod.

[0014] 3. Compared with other types of bearings, the bearing used in the return plate of the utility model is a ball bearing, which has the advantages of low friction resistance, high operating precision, strong load-bearing capacity, high degree of standardization and good wear resistance. These advantages make ball bearings an ideal choice in applications such as snowplow support wheels that require frequent movement or rotation.

[0015] 4. Compared with other types of bearings, the thrust roller and needle roller combination bearing is used as the bearing between the support wheel mounting rod and the eccentric wheel support wheel in this utility model. This bearing has significant advantages in the application between the support wheel mounting rod and the eccentric wheel support wheel, including high load-bearing capacity, compact structure, smooth operation, good wear resistance and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the main view of the utility model.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 1-Figure 2 Among them, label 1 - support wheel, 2 - support wheel mounting rod, 3 - eccentric wheel, 4 - bearing 1, 5 - snap clamp, 6 - return plate, 7 - return spring, 8 - bearing 2, 9 - bolt and nut 1, 10 - bolt and nut 2. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] like Figure 1-2The support wheel return device shown in the figure includes a support wheel 1 and a support wheel mounting rod 2. The support wheel 1 is provided with an eccentric wheel 3. The support wheel 1 is mounted on the lower end of the support wheel mounting rod 2 through the eccentric wheel 3 and a bearing 1 4 located inside the eccentric wheel 3. The existence of the bearing 1 4 enables the support wheel 1 with the eccentric wheel 3 to rotate freely on the support wheel mounting rod 2; a snap clamp 5 is sleeved on the support wheel mounting rod 2 above the eccentric wheel 3, one end of the snap clamp 5 can be connected to a return plate 6 through a rotating shaft, a bearing, a rotating snap, etc., and the return plate 6 can rotate freely horizontally relative to the snap clamp 5; the other end of the snap clamp 5 is connected to a return spring 7, and the other end of the return spring 7 is connected to the return plate 6, that is, the snap clamp 5 is connected to the other end of the return plate 6 through the return spring 7; a bearing 2 8 is provided at the bottom of the return plate 6, and the bearing surface of the bearing 2 8 is in close contact with the outer edge of the eccentric wheel 3.

[0021] Bearing 2 8 is a ball bearing. Compared with other types of bearings, this bearing has the advantages of low friction resistance, high operating precision, strong load-bearing capacity, high degree of standardization and good wear resistance. These advantages make ball bearings an ideal choice in applications such as snowplow support wheels that require frequent movement or rotation.

[0022] The bearing 2 8 is mounted on the bottom of the return plate 6 by means of bolts and nuts 1 9. This design facilitates removal and installation during replacement.

[0023] Bearing 1 4 is a thrust roller needle roller combination bearing. Compared with other types of bearings, this bearing has significant advantages in the application between the support wheel mounting rod 2 and the eccentric wheel 3 support wheel 1, including high load-bearing capacity, compact structure, smooth operation, good wear resistance and strong adaptability.

[0024] The snap-fit ​​clamping plate 5 is mounted on the support wheel mounting rod 2 by means of bolts and nuts 10. This design facilitates removal and installation during replacement.

[0025] The working principle and working process of this utility model are as follows:

[0026] (1) Initial state:

[0027] The support wheel 1 is connected to the support wheel mounting rod 2 through the eccentric wheel 3 and the bearing 4 located inside the eccentric wheel 3 to ensure that it can rotate smoothly.

[0028] The snap clamp 5 is fixed on the support wheel mounting rod 2 by means of bolts and nuts 10 , one end of which is connected to the return plate 6 , and the other end of which is connected to the return plate 6 by means of a return spring 7 .

[0029] A bearing 2 8 is installed at the bottom of the return plate 6 for contacting and pressing the eccentric wheel 3.

[0030] (2) Support wheel 1 rotates:

[0031] When the supporting wheel 1 is acted upon by an external force and rotates by a certain angle, the eccentric wheel 3 also rotates accordingly.

[0032] Due to the design of the eccentric wheel 3, the distance from its rotation center to the wheel outer diameter will change with the change of the rotation angle.

[0033] When the support wheel 1 rotates to a certain angle, the distance between the rotation center of the eccentric wheel 3 and the outer diameter of the wheel and the bearing 2 8 at the bottom of the return plate 6 will increase, causing the return spring 7 to be stretched, thereby generating tension.

[0034] (3) Return process:

[0035] When the external force disappears or the supporting wheel 1 is parallel to the forward direction of the vehicle, the return spring 7 begins to contract and releases its stored elastic potential energy.

[0036] The contraction of the return spring 7 pulls the return plate 6, thereby driving the second bearing 8 to move toward the eccentric wheel 3.

[0037] When the bearing 2 8 contacts the eccentric wheel 3, it will produce an extrusion effect on the eccentric wheel 3, causing the eccentric wheel 3 to be subjected to a reverse torque.

[0038] Due to the design characteristics of the eccentric wheel 3, when subjected to a reverse torque, it tends to rotate to a position where the distance between the rotation center and the wheel outer diameter is the shortest, that is, the initial state.

[0039] Therefore, under the joint action of the return spring 7 and the bearing 2 8, the support wheel 1 with the eccentric wheel 3 will gradually return to the initial position, realizing the automatic return function.

[0040] steady state:

[0041] When the support wheel 1 with the eccentric wheel 3 returns to the initial position, the tension of the return spring 7 reaches a balanced state and no longer continues to contract or stretch.

[0042] At this point, the entire system is in a stable state, waiting for the next external force or the rotation of the support wheel 1.

[0043] In summary, the design of the support wheel 1 with the eccentric wheel 3 realizes the automatic return function of the support wheel 1 by utilizing the characteristics of the eccentric wheel 3 and the elastic potential energy of the return spring 7. This design not only improves the stability and reliability of the equipment, but also simplifies the operation and maintenance process.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A support wheel return device, comprising a support wheel and a support wheel mounting rod, characterized in that: The support wheel is provided with an eccentric wheel, and the support wheel is mounted on the lower end of the support wheel mounting rod through the eccentric wheel and a bearing located inside the eccentric wheel; a snap clamp is sleeved on the support wheel mounting rod above the eccentric wheel, one end of the snap clamp is connected to a return plate that can rotate freely horizontally, the other end of the snap clamp is connected to a return spring, and the other end of the return spring is connected to the return plate; a bearing 2 is provided at the bottom of the return plate, and the bearing surface of the bearing 2 is in close contact with the outer edge of the eccentric wheel.

2. The support wheel return device according to claim 1, characterized in that: The second bearing is a ball bearing.

3. The support wheel return device according to claim 1 or 2, characterized in that: The second bearing is mounted on the bottom of the return plate through a first bolt and a nut.

4. The support wheel return device according to claim 3, characterized in that: The first bearing is a thrust roller and needle roller combination bearing.

5. The support wheel return device according to claim 4, characterized in that: The snap clamp is mounted on the support wheel mounting rod via bolts and nuts.

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