A drive wheel and a sliding tractor

Abstract

This utility model discloses a drive wheel and a sliding tractor. The drive wheel includes a drive input component, a rotating component coaxially arranged with the drive input component, and an output friction wheel assembly ring-fitted onto the rotating component. The drive input component provides driving force to the rotating component and drives the output friction wheel assembly to rotate. The rotating component includes at least a planetary gear system assembly, which includes an inner planetary gear, an input sun gear, an outer planetary gear, and an output shaft. The input sun gear is located between the inner and outer planetary gears. The rotating shaft connecting the inner and outer planetary gears and the input sun gear extends outward and is inserted into the output shaft, forming an axial driving force on the output shaft. This utility model has a small overall structure, significantly improved service life of each component, and strong overall transmission stability.

Description

Technical Field

[0001] This utility model relates to the field of friction wheel drive technology, specifically a drive wheel and a sliding tractor. Background Technology

[0002] Tractors used for track guidance employ friction wheels as their traveling mechanism. The tractor moves or stops by controlling the contact or movement of the friction wheel with the lower surface of the track. Currently, the drive mechanism for the friction wheel primarily uses a servo motor, along with a synchronous belt and pulley, as the transmission mechanism. The servo motor input shaft and the friction wheel output shaft are respectively fixed to the main mounting components. This drive mechanism limits the friction wheel's space due to the constraints of the transmission mechanism and shaft length. Furthermore, the synchronous belt experiences significant frictional losses during use, especially with frequent starts and stops, which drastically shortens the lifespan of each component and significantly reduces the individual strength of each structural element, affecting the overall stability of the transmission structure. Therefore, it is necessary to improve the friction wheel and its drive mechanism. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the present invention provides a drive wheel and a sliding tractor, which has a small overall structure, greatly improves the service life of each component, and has strong overall transmission stability.

[0004] To solve the above technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model discloses a drive wheel, including a drive input component, a rotating component coaxially arranged with the drive input component, and an output friction wheel assembly ringed on the rotating component;

[0006] The drive input component provides driving force and drives the output friction wheel assembly to rotate;

[0007] The rotating assembly includes at least a planetary gear system assembly, which includes an inner planetary gear, an input sun gear, an outer planetary gear, and an output shaft. The input sun gear is located between the inner planetary gear and the outer planetary gear. The rotating shaft connecting the inner planetary gear, the outer planetary gear, and the input sun gear extends outward and is inserted into the output shaft to form an axial driving force on the output shaft.

[0008] Furthermore, the rotating assembly also includes a reducer input flange, which includes a flange portion in the shape of an annular cylinder and an outwardly extending protrusion. The outer surface of the flange portion is provided with a stepped stop structure, and the inner surface of the protrusion is provided with an internal tooth structure.

[0009] The drive input assembly is located inside the flange, the output friction wheel assembly is sleeved around the outside of the protrusion and limited by the stepped stop structure, the planetary gear assembly is located in the internal gear structure inside the protrusion, the drive input assembly provides the driving force to the drive device to drive the planetary gear assembly to rotate, and the planetary gear assembly drives the reducer input flange and the output friction wheel assembly to rotate synchronously.

[0010] Furthermore, the rotating assembly also includes an output bearing assembly, which is sleeved around the outside of the protrusion, and the output friction wheel assembly is sleeved around the outside of the output bearing assembly;

[0011] The outer surface of the flange is provided with a first stepped stop, and the outer surface edge of the protrusion is provided with a snap ring groove. The snap ring groove and the first stepped stop are used together to limit the output bearing assembly. The inner surface edge of the protrusion is provided with an internal gear ring for meshing with the gear in the planetary gear system assembly.

[0012] Furthermore, the output bearing assembly includes a bearing cover plate, an inner output bearing, a large bearing spacer, an outer output bearing, and a large outer ring retaining ring;

[0013] The bearing cover plate is placed at the first step stop on the outer surface of the flange. The inner output bearing, the large bearing spacer and the outer output bearing are sequentially sleeved on the outer surface of the protrusion. The large outer ring retaining ring is placed in the retaining ring groove on the outer surface of the flange.

[0014] Furthermore, the drive input assembly includes a drive servo motor, a bearing spacer, an inner ring snap ring, a reducer input shaft, an inner input bearing, an outer input bearing, and a small outer ring snap ring;

[0015] The drive servo motor, together with the reducer output shaft, is inserted into the reducer input shaft. One end of the reducer input shaft is sequentially fitted with the inner ring retaining ring and the bearing spacer. The other end of the reducer input shaft is sequentially fitted with the inner input bearing, the outer input bearing and the small outer ring retaining ring, and then inserted into the inner side of the flange.

[0016] Furthermore, the output friction wheel assembly includes a reducer housing flange sleeve, an external bearing, flange sleeve bolts, output end bolts, a rubber-coated drive wheel, and drive wheel bolts;

[0017] The reducer housing flange has an inner ring bolt hole and an outer ring bolt hole. The outer ring bolt hole is connected to the bearing cover plate through the flange bolt, and the inner ring bolt hole is connected to the output shaft through the drive wheel bolt.

[0018] The rubber-coated drive wheel is sleeved on the reducer housing flange and connected to the reducer housing flange via the output end bolts. The external bearing is mounted on the outermost step of the reducer housing flange.

[0019] Furthermore, the output shaft includes an annular central portion, a left convex portion, and a right convex portion. The annular central portion has a hole around its circumference for connecting the output shaft to the reducer housing flange sleeve, and the right convex portion has a hole for connecting the output shaft to the outer planetary gear.

[0020] Furthermore, the outer surface of the reducer housing flange is provided with multiple steps, with a hole at the outermost step connected to the output shaft, a hole at the innermost step connected to the bearing cover plate, and a hole at the middle step connected to the rubber-coated drive wheel.

[0021] Furthermore, the radial direction of the rubber-coated drive wheel extends from the externally mounted bearing to the edge of the flange portion of the reducer input flange.

[0022] This utility model also discloses a sliding tractor, including the aforementioned drive wheel.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The drive wheel provided by this utility model has a stepped stop structure on the outer surface of the input flange of the reducer and an internal tooth structure on its inner surface, so that the output bearing assembly is limited to the outer surface of the input flange of the reducer, and the planetary gear assembly is meshed with the inner surface of the input flange of the reducer. The overall structure is stable and durable, ensuring the stability of the drive device during operation and withstanding greater radial pressure.

[0025] 2. The drive wheel provided by this utility model adopts a double bearing connection structure in the drive input component and the output friction wheel component respectively, so that the drive device can withstand large radial pressure while the force distribution is uniform and the operation stability is high.

[0026] 3. The drive wheel provided by this utility model improves the stability and efficiency of the drive force transmission by adopting a planetary gear system assembly, further increases the service life of the drive device, and can greatly reduce the noise and vibration generated during the movement, and avoid the deviation or damage of parts.

[0027] 4. The drive wheel provided by this utility model widens the spokes of the friction wheel by extending the mounting end of the rubber-coated drive wheel in the opposite direction to the input motor, thereby further improving the radial bearing pressure.

[0028] 5. The drive wheel provided by this utility model completely encloses moving parts such as gears and bearings, making it easier to keep the parts clean and further increasing the service life of the device.

[0029] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the drive wheel in this utility model.

[0031] Figure 2 This is an exploded structural diagram of the drive wheel in this utility model.

[0032] Figure 3 This is an exploded structural diagram of the drive wheel in this utility model.

[0033] Figure 4 This is a cross-sectional schematic diagram of the input flange of the reducer in the drive wheel of this utility model.

[0034] Figure 5 This is a schematic diagram of the structure of the input flange of the reducer in the drive wheel of this utility model.

[0035] Figure 6 This is a cross-sectional schematic diagram of the drive input component in the drive wheel of this utility model.

[0036] Figure 7 This is a schematic diagram of the output bearing assembly in the drive wheel of this utility model.

[0037] Figure 8 This is a cross-sectional structural diagram of the output bearing assembly in the drive wheel of this utility model.

[0038] Figure 9 This is a schematic diagram of the planetary gear system assembly in the drive wheel of this utility model.

[0039] Figure 10 This is a cross-sectional structural diagram of the planetary gear system assembly in the drive wheel of this utility model.

[0040] Figure 11 This is a schematic diagram of the output friction wheel assembly in the drive wheel of this utility model.

[0041] Figure 12 This is a cross-sectional schematic diagram of the output friction wheel assembly in the drive wheel of this utility model.

[0042] Figure 13 This is a cross-sectional schematic diagram of the flange sleeve of the reducer housing in the drive wheel of this utility model.

[0043] Figure 14 This is a side cross-sectional schematic diagram of the flange sleeve of the reducer housing in the drive wheel of this utility model.

[0044] Figure 15 This is a schematic diagram of the structure of the flange sleeve of the reducer housing in the drive wheel of this utility model.

[0045] Figure 16 This is a schematic diagram of the output shaft in the drive wheel of this utility model.

[0046] Figure 17 This is a side cross-sectional view of the drive wheel in this utility model. Detailed Implementation

[0047] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the present utility model is further described below in conjunction with specific illustrations. However, this utility model is not limited to the embodiments described below.

[0048] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in reading and understanding the content disclosed in the specification, 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 proportions, 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.

[0049] Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0050] This embodiment discloses a sliding tractor, which has a drive wheel inside. The sliding tractor moves or stops by contacting or moving away from the lower surface of the track through the drive wheel.

[0051] like Figure 1 and Figure 2 As shown, the drive wheel includes a drive input assembly 100, an output bearing assembly 200, a planetary gear system assembly 400, an output friction wheel assembly 300 connected end to end, and a reducer input flange 8 serving as a connecting member between the above assemblies.

[0052] like Figure 4 and Figure 5As shown, the reducer input flange 8 includes a ring-shaped flange portion 81 and an outwardly extending protrusion 82. The outer surface of the reducer input flange 8 has a stepped stop structure for mounting other components. For example, the outer surface of the flange portion 81 has a first stepped stop 83, and the outer edge of the protrusion 82 has a retaining ring groove 84 for securing the output bearing assembly 200. The inner surface of the protrusion 82 has an internal gear ring portion 85 for gear meshing in the planetary gear system assembly 400.

[0053] like Figure 6 As shown, the drive input assembly 100 includes a drive servo motor 1, a bearing spacer 2, an inner ring snap ring 3, a reducer input shaft 4, an inner input bearing 5, an outer input bearing 6, and a small outer ring snap ring 7. The drive servo motor 1, along with the reducer output shaft, is inserted into the reducer input shaft 4 and contacts the inner side of the reducer input flange 8 via the inner input bearing 5 and the outer input bearing 6. After the reducer output shaft is inserted into the reducer input shaft 4, the inner ring snap ring 3 is fitted onto the edge of one end of the reducer input shaft 4, and the bearing spacer 2 is used to press the inner ring snap ring 3 against the reducer output shaft. Then, the inner input bearing 5 and the outer input bearing 6 are sequentially fitted onto the other end of the reducer input shaft 4. The outer ring snap ring 7 is then used to fix the front end of the outer input bearing 6. In this way, the front ends of the two input bearings are fixed to one end of the reducer input shaft, and the rear ends of the two input bearings are fixed inside the flange portion 81 of the reducer input flange 8. The drive input assembly 100 is mounted and fixed to the inside of the reducer input flange 8 via holes on the drive servo motor 1. The front ends of the inner input bearing 5 and the outer input bearing 6 are fixed to one end of the reducer input shaft 4 by outer ring snap rings 7, and the rear ends of the two bearings are fixed to the inside of the reducer input flange 8 by inner ring snap rings 3. The bearing spacers 2 are then used for clamping. This double bearing structure ensures uniform force distribution and high overall operational stability.

[0054] like Figure 7 and Figure 8As shown, the output bearing assembly 200 includes a bearing cover plate 9, an inner output bearing 10, a large bearing spacer 11, an outer output bearing 16, and a large outer ring retaining ring 17. The output bearing assembly 200 is fitted onto the outside of the input flange 8 of the reducer. The bearing cover plate 9 is placed at the first step stop 83 on the outer surface of the flange portion 81. The inner output bearing 10, the large bearing spacer 11, and the outer output bearing 16 are sequentially fitted onto the outer surface of the protrusion 82 of the input flange 8 of the reducer, and the large outer ring retaining ring 17 is fixedly installed at the retaining ring slot 84. Thus, one side of the double bearing structure composed of the inner output bearing 10, the large bearing spacer 11, and the outer output bearing 16 is limited and fixed in the retaining ring slot 84 by the large outer ring retaining ring 17, and the other side is limited and fixed at the first step stop 83 by the bearing cover plate 9. The bearing cover plate 9 has an annular hole that fits into the reducer housing flange sleeve 18 in the output friction wheel assembly 300. This allows the output bearing assembly 200 to be completely fitted over the outside of the reducer input flange 8 and fully covered by the inside of the reducer housing flange sleeve 18, preventing the dual bearing structure from being exposed. This effectively ensures component cleanliness, increases service life, and reduces maintenance costs. The reducer input flange 8, as the main load-bearing component, has a snap ring groove 84 and a first-step stop 83 that securely fastens the output bearing assembly 200 onto the protrusion 82 of the reducer input flange 8. This dual-bearing spacer design—inner output bearing 10, large bearing spacer 11, and outer output bearing 16—improves structural stability and component lifespan.

[0055] like Figure 9 and Figure 10 As shown, the planetary gear train assembly 400 includes an inner planetary gear 12, an input sun gear 13, an outer planetary gear 14, and an output shaft 15. The input sun gear 13 is located between the inner planetary gear 12 and the outer planetary gear 14. The input sun gear 13 has four equally spaced shaft holes on both sides of its circumference, through which it connects to the inner planetary gear 12 and the outer planetary gear 14. The shaft connecting the inner planetary gear 12, the outer planetary gear 14, and the input sun gear 13 extends outward and is inserted into the output shaft 15, generating an axial driving force on the output shaft 15. This planetary gear transmission structure is a stable and efficient transmission structure, which can greatly improve the overall stability and service life of the device, and significantly reduce noise and vibration generated during operation.

[0056] like Figure 11 and Figure 12As shown, the output friction wheel assembly 300 includes a reducer housing flange sleeve 18, an external bearing 19, flange sleeve bolts 20, output end bolts 21, a rubber-coated drive wheel 22, and drive wheel bolts 23. The reducer housing flange sleeve 18 encloses the output bearing assembly 200. The reducer housing flange sleeve 18 has two sets of bolt holes: an inner ring bolt hole 181 and an outer ring bolt hole 182. Figure 13 and Figure 14 As shown. The outer ring bolt hole 182 is connected to the annular hole on the bearing cover plate 9 in the output bearing assembly 200 via flange bolts 20. The inner ring bolt hole 181 is connected to the annular hole on the output shaft 15 in the planetary gear assembly 400 via drive wheel bolts 23. The rubber-coated drive wheel 22 is fitted onto the reducer housing flange 18, and the annular hole in the middle of the reducer housing flange 18 is connected to the mounting hole on the rubber-coated drive wheel 22 via output end bolts 21. A step is provided on the outer side of the reducer housing flange 18, and the external bearing 19 is mounted on this step.

[0057] like Figure 15 As shown, the outer surface of the reducer housing flange sleeve 18 is provided with multiple steps. The outermost step has a hole connected to the output shaft 15, the innermost step has a hole connected to the bearing cover plate 9, and the middle step has a hole connected to the rubber-coated drive wheel 22.

[0058] like Figure 16 As shown, the output shaft 15 includes an annular central portion 150, a left convex portion 151, and a right convex portion 152. The annular central portion 150 has a hole around its circumference for connecting the output shaft 15 to the reducer housing flange sleeve 18. The right convex portion 152 has a hole for connecting the output shaft 15 to the outer planetary gear 14.

[0059] The output friction wheel assembly 300 implements a structure in which the rubber-coated drive wheel 22 is installed as the reverse of the friction wheel, that is, the direction of the friction wheel extends from the mounting end in the opposite direction to the input motor. This structure makes the output shaft of the friction wheel shorter and further widens the spokes of the friction wheel, enabling it to bear greater radial pressure.

[0060] like Figure 17As shown, the servo motor 1 is connected to the reducer, and the reducer output shaft is inserted into one end of the reducer input shaft 4. The other end of the reducer input shaft 4 is inserted into and drives the input sun gear 13. The inner planetary gear 12 and the outer planetary gear 14 are simultaneously connected to and driven on both sides of the input sun gear 13. The output shaft 15 is connected and driven by extending the shaft connecting to the input sun gear 13 outwards. The output shaft 15 is bolted to the reducer housing flange sleeve 18, and the outermost rubber-coated drive wheel 22 is bolted to the reducer housing flange sleeve 18, forming a complete power output. This enables the servo motor 1 to drive the reducer input shaft 4, then the input sun gear 13, then the output shaft 15, ultimately driving the outermost rubber-coated drive wheel 22 to rotate. It should be noted that this application does not limit the output form to using a rubber-coated drive wheel 22; other materials can also be used for the mounting wheel.

[0061] In operation, the drive wheel serves as the friction wheel for the sliding tractor. Activating the drive servo motor 1 drives the input sun gear 13 to rotate, which in turn rotates the entire drive unit, allowing the sliding tractor to move along the track. During movement, the wide-spoke design of the rubber-coated drive wheel 22 enables it to withstand significant radial pressure, ensuring stable operation of the sliding tractor. The multi-stage steps and stop structures in each load-bearing component provide excellent sealing for the entire drive unit, preventing exposed gears, bearings, and other moving parts, thus maintaining cleanliness and increasing the unit's lifespan.

[0062] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A drive wheel, characterized in that, It includes a drive input component (100), a rotating component coaxially disposed with the drive input component (100), and an output friction wheel assembly (300) ringed on the rotating component. The drive input component (100) provides driving force to the rotating component and drives the output friction wheel assembly (300) to rotate; The rotating assembly includes at least a planetary gear system assembly (400), which includes an inner planetary gear (12), an input sun gear (13), an outer planetary gear (14), and an output shaft (15). The input sun gear (13) is located between the inner planetary gear (12) and the outer planetary gear (14). The rotating shaft connecting the inner planetary gear (12), the outer planetary gear (14), and the input sun gear (13) extends outward and is inserted into the output shaft (15) to form an axial driving force on the output shaft (15).

2. The drive wheel according to claim 1, characterized in that, The rotating assembly also includes a speed reducer input flange (8), which includes a flange portion (81) in the shape of an annular cylinder and an outwardly extending protrusion (82). The outer surface of the flange portion (81) is provided with a stepped stop structure, and the inner surface of the protrusion (82) is provided with an internal tooth structure. The drive input assembly (100) is located inside the flange (81), the output friction wheel assembly (300) is sleeved around the outside of the protrusion (82) and limited by the stepped stop structure, the planetary gear assembly (400) is located in the internal gear structure inside the protrusion (82), the driving force provided by the drive input assembly (100) drives the planetary gear assembly (400) to rotate, and the planetary gear assembly (400) drives the reducer input flange (8) and the output friction wheel assembly (300) to rotate synchronously.

3. The drive wheel according to claim 2, characterized in that, The rotating assembly further includes an output bearing assembly (200) which is sleeved around the outside of the protrusion (82), and an output friction wheel assembly (300) which is sleeved around the outside of the output bearing assembly (200). The outer surface of the flange (81) is provided with a first stepped stop (83), and the outer surface edge of the protrusion (82) is provided with a snap ring groove (84). The snap ring groove (84) and the first stepped stop (83) are used together to limit the output bearing assembly (200). The inner surface edge of the protrusion (82) is provided with an internal gear ring (85), which is used to mesh with the gear in the planetary gear system assembly (400).

4. The drive wheel according to claim 3, characterized in that, The output bearing assembly (200) includes a bearing cover plate (9), an inner output bearing (10), a large bearing spacer (11), an outer output bearing (16), and a large outer ring retaining ring (17). The bearing cover plate (9) is placed at the first step stop (83) on the outer surface of the flange (81). The inner output bearing (10), the large bearing spacer (11) and the outer output bearing (16) are sequentially sleeved on the outer surface of the protrusion (82). The large outer ring snap ring (17) is placed in the snap ring groove (84) on the outer surface of the flange (81).

5. The drive wheel according to claim 4, characterized in that, The drive input assembly (100) includes a drive servo motor (1), a bearing spacer (2), an inner ring snap ring (3), a reducer input shaft (4), an inner input bearing (5), an outer input bearing (6), and a small outer ring snap ring (7). The drive servo motor (1) and the reducer output shaft are inserted into the reducer input shaft (4). One end of the reducer input shaft (4) is sequentially fitted with the inner ring snap ring (3) and the bearing spacer (2). The other end of the reducer input shaft (4) is sequentially fitted with the inner input bearing (5), the outer input bearing (6) and the small outer ring snap ring (7), and then inserted into the inner side of the flange (81).

6. The drive wheel according to claim 4, characterized in that, The output friction wheel assembly (300) includes a reducer housing flange sleeve (18), an external bearing (19), flange sleeve bolts (20), output end bolts (21), a rubber-coated drive wheel (22), and drive wheel bolts (23). The reducer housing flange (18) is provided with an inner ring bolt hole (181) and an outer ring bolt hole (182). The outer ring bolt hole (182) is connected to the bearing cover plate (9) through the flange bolt (20), and the inner ring bolt hole (181) is connected to the output shaft (15) through the drive wheel bolt (23). The rubber-coated drive wheel (22) is sleeved on the reducer housing flange sleeve (18) and connected to the reducer housing flange sleeve (18) by the output end bolt (21). The external bearing (19) is mounted on the outermost step of the reducer housing flange sleeve (18).

7. The drive wheel according to claim 6, characterized in that, The output shaft (15) includes an annular central portion (150), a left convex portion (151) and a right convex portion (152). The annular central portion (150) has a hole around its circumference for connecting the output shaft (15) to the reducer housing flange sleeve (18). The right convex portion (152) has a hole for connecting the output shaft (15) to the outer planetary gear (14).

8. The drive wheel according to claim 6, characterized in that, The outer surface of the reducer housing flange sleeve (18) is provided with multiple steps. The outermost step has a hole connected to the output shaft (15), the innermost step has a hole connected to the bearing cover plate (9), and the middle step has a hole connected to the rubber-coated drive wheel (22).

9. The drive wheel according to claim 6, characterized in that, The radial direction of the rubber-coated drive wheel (22) extends from the external bearing (19) to the edge of the flange portion (81) of the gearbox input flange (8).

10. A sliding tractor, characterized in that, Includes the drive wheel as described in any one of claims 1 to 9.

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