Hydraulic floating type planetary structure differential driving assembly

Abstract

The invention belongs to the technical field of driving wheels, and particularly relates to a hydraulic floating type planetary structure differential driving assembly which comprises a driving assembly composed of a driving wheel and a motor controlling the driving wheel to walk. The box body is provided with the driving wheel and the motor; when the motor controls the driving wheels to walk, the box body synchronously moves along with the driving wheels; the middle shaft bracket is embedded into the box body and can swing in the box body; the floating assembly is installed on the middle shaft support, and the installation mechanism is arranged at the top end of the middle shaft support and mechanically fixed to the output end of the top of the oil cylinder. The guide piece is movably assembled on the middle shaft support, and the top end of the guide piece is connected with the mounting mechanism. Various requirements of a vehicle / loading platform for carrying goods are met, and the guide piece has a good application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of drive wheels, and in particular relates to a hydraulic floating planetary structure differential drive assembly. Background Art

[0002] Some loading platforms require drive wheels to achieve multi-directional travel and braking. With the continuous development of loading platforms, more and more requirements are being placed on drive wheels, such as product size, function, and load capacity.

[0003] However, existing products suffer from uneven wheel pressure and uneven ground force on the wheels in multi-wheel mode. In addition, when the wheels turn frequently, the oil pipe will turn with the drive, causing entanglement, and the motor cable is also prone to entanglement in this situation. Summary of the Invention

[0004] In order to solve the problems existing in the above-mentioned background technology, the present invention proposes a hydraulic floating planetary structure differential drive assembly.

[0005] To achieve the above object, the present invention provides the following technical solutions: A hydraulic floating planetary differential drive assembly includes: a drive assembly consisting of a drive wheel and a motor that controls the movement of the drive wheel; a housing mounted with the drive wheel and the motor; when the motor controls the movement of the drive wheel, the housing moves synchronously with the drive wheel; a central axis bracket embedded in the housing and capable of swinging within the housing; and a floating assembly mounted on the central axis bracket, which includes: The oil cylinder is embedded in the middle axis bracket and the bottom end is mechanically fixed to the middle axis bracket; the mounting mechanism is provided at the top end of the middle axis bracket and mechanically fixed to the top output end of the oil cylinder; the guide member is movably assembled on the middle axis bracket and the top end is connected to the mounting mechanism; So that: when the output end of the cylinder drives the mounting mechanism to perform lifting motion, the guide member rises and falls synchronously with the central axis bracket; when the central axis bracket swings in the box body, it drives the floating assembly to swing synchronously; when the box body moves following the driving wheel, the central axis bracket moves synchronously with the box body, thereby driving the floating assembly to move synchronously.

[0006] As a technical solution of the present invention, the driving wheel includes a first driving wheel and a second driving wheel, and the motor includes a first motor for controlling the movement of the first driving wheel and a second motor for controlling the movement of the second driving wheel to achieve differential drive.

[0007] As a technical solution of the present invention, the box body includes a first cavity for accommodating the central axis bracket, a drive assembly mounting frame integrally formed at both ends of the box body, and an axial hole A for connecting the box body and the central axis bracket; The central axis passes through the axis hole A and is embedded in the corresponding axis hole B on the central axis bracket, so that the central axis bracket can swing along the circumferential direction of the central axis in the first cavity of the box.

[0008] As a technical solution of the present invention, the central axis bracket includes a second cavity that can accommodate the oil cylinder, a guide groove for assembling a guide member, and an axial hole B for connecting to the box body. A bottom plate is provided in the second cavity, and the bottom plate divides the second cavity into an upper chamber and a lower chamber, and the upper chamber is used to assemble the oil cylinder.

[0009] As a technical solution of the present invention, the mounting mechanism includes a mounting plate, a slewing bearing, and a positioning plate. A first passage is provided in the middle of the mounting plate for the oil cylinder to pass through. The top of the mounting plate is an annular groove structure, the slewing bearing is embedded in the annular groove structure, and the gap between the slewing bearing and the annular groove structure is sealed by a first oil seal. The top output end of the oil cylinder passes through the slewing bearing and is embedded in the positioning plate. The positioning plate is mechanically fixed to the slewing bearing. The mounting plate and the slewing bearing are both provided with a second passage for the oil cylinder pipe and the wire to pass through, so as to prevent entanglement.

[0010] As a technical solution of the present invention, the mounting plate also includes an encoder mounting portion integrally formed therewith, the interior of the encoder mounting portion is hollow and connected to the annular groove structure, a rotary encoder is provided in the encoder mounting portion, and at least one tooth of the encoder gear of the rotary encoder passes through the connecting portion and engages with the rotating external tooth of the slewing bearing.

[0011] As a technical solution of the present invention, the driving wheel includes a traveling wheel, a hub flange, an axle seat, a sun gear shaft, a ring gear, a fixed gear, a first planetary gear set, a first sun gear, a first planetary carrier, a second planetary gear set, a second sun gear, and a second planetary carrier. When the sun gear shaft is driven by the motor, it drives the first sun gear to rotate, thereby driving the first planetary gear set to rotate in the ring gear. The first planetary carrier drives the second sun gear to rotate, thereby driving the second planetary gear set to rotate in the ring gear, thereby driving the second planetary carrier and the hub flange to rotate, thereby controlling the movement of the traveling wheel.

[0012] As a technical solution of the present invention, the interior of the traveling wheel is a cavity that runs through the left and right sides and is provided with a flange. The hub flange is embedded in the cavity and fixedly connected to the flange. The outer end of the hub flange is assembled with the second planetary carrier, and the inner end is tightly fitted with the axle seat through a second oil seal. The sun gear shaft is assembled on the axle seat, and one end passes through the axle seat and is connected to the first sun gear, and the other end passes through the axle seat and is connected to the third transmission gear for being driven by the motor.

[0013] As a technical solution of the present invention, the inner wall of the ring gear is provided with a first ring gear area and a second ring gear area, the first ring gear area and the second ring gear area are separated by a smooth area, each planetary gear in the first planetary gear set has at least one tooth engaged with the first ring gear area, and each planetary gear in the second planetary gear set has at least one tooth engaged with the second ring gear area, and the first planet is mounted on the smooth area and the first planetary gear set is installed.

[0014] As a technical solution of the present invention, a connecting tooth is provided in the middle of the first planetary carrier, and the connecting tooth is engaged with the second sun gear; the first planetary gear set is driven by the first sun gear, the second planetary gear set is driven by the second sun gear, and the second planetary gear set is assembled on the second planetary carrier; the gear part of the fixed gear is engaged with the ring gear, and a limiting gasket connected to the ring gear is nested therein, and the fixed gear is also connected to the shaft seat by bolts.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The wheels have a small diameter and use a wheel-side planetary reducer with huge traction and bearing capacity. The central axis swings to balance the wheel pressure and is hydraulically floating. Multiple wheel sets can adapt to the ground and meet the needs of lifting cargo on the vehicle. The oil cylinder and oil pipe are installed on the top. Under the action of the guide column, the oil pipe does not need to turn with the drive to prevent the oil pipe from being entangled. The top round hole is used for wire outlet, so the motor cable will not be entangled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the box, central axis support, and floating assembly of the present invention from one perspective; Figure 3 This is a schematic diagram of the exploded structure of the box, central axis support, and floating assembly of the present invention from another perspective; Figure 4 This is a schematic diagram of the box, central axis support, and floating assembly of the present invention from one perspective; Figure 5 This is a schematic diagram of the explosion structure of the driving wheel of the present invention; Figure 6 This is a perspective schematic diagram of the drive wheel explosion structure of the present invention. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] As used in this application and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not intended to refer to the singular but may include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0019] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0020] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0023] refer to Figure 1 A hydraulic floating planetary structure differential drive assembly includes a drive component consisting of a drive wheel 1 and a motor 2 for controlling the movement of the drive wheel. The drive wheel 1 includes a first drive wheel and a second drive wheel, and the motor 2 includes a first motor for controlling the movement of the first drive wheel and a second motor for controlling the movement of the second drive wheel, so as to realize differential drive. Figure 1 As can be seen, the first drive wheel and the second drive wheel, the first motor and the second motor are symmetrically arranged and have the same structure. Therefore, they are not marked in the drawings and the following text, but they can be clearly understood from the drawings and descriptions. The drive wheel 1 and the motor 2 are both installed in the box 3. The drive component mounting brackets are integrally formed at both ends of the box 3. The mounting brackets include a motor mounting seat 31 and a drive wheel mounting seat 32. When the motor 2 controls the driving wheel 1 to move, the box 3 moves synchronously with the driving wheel 1 .

[0024] refer to Figure 2In actual use, in order to achieve wheel pressure balance, a swingable central axis bracket 9 is embedded in the box body 3. Specifically, the box body 3 is provided with a first cavity 33 for accommodating the central axis bracket 9, and an axial hole A34 for connecting the box body and the central axis bracket; the central axis 10 passes through the axial hole A34 and is embedded in the corresponding axial hole B91 on the central axis bracket 9. The external flange of the central axis 10 is fixed to the outer wall of the box body 3 by bolts, and the cylindrical inner shaft passes through the box body 3 and is embedded in the central axis bracket 9, so that the box body 3 and the central axis bracket 9 are movably connected, so that the central axis bracket 9 can swing along the circumferential direction of the central axis 10 in the first cavity 33 of the box body 3.

[0025] In actual use, in order to achieve that the multiple wheel sets can adapt to the ground and bear the force evenly, the present invention further assembles a floating component on the central axis bracket.

[0026] refer to Figure 3 and Figure 4 In one embodiment, the floating assembly includes a cylinder 15 embedded in the center support 9 and bolted to the center support via a bolt. To facilitate installation and removal of the cylinder 15, the center support 9 is provided with a second cavity for accommodating the cylinder 15. A bottom plate 92 is provided within the second cavity, dividing the second cavity into an upper chamber 93 and a lower chamber 94. The upper chamber 93 is used to mount the cylinder 15. As can be seen, the bottom plate 92 should be provided with bolt holes or other suitable connection methods for mounting with the bottom of the cylinder. The lower chamber 94 is used to tighten and loosen the bolts connecting / removing the two. The floating assembly also includes a mounting mechanism located at the top of the center support and mechanically secured to the top output end of the cylinder for connecting to external equipment.

[0027] In one embodiment, the mounting mechanism includes a mounting plate 4, a slewing bearing 5 and a positioning plate 14. A first channel 41 is provided in the middle of the mounting plate 4 for the oil cylinder 15 to pass through. The top of the mounting plate 4 is an annular groove structure. The slewing bearing 5 is embedded in the annular groove structure, and the gap between the slewing bearing and the annular groove structure is sealed by a first oil seal. The top output end of the oil cylinder 15 passes through the slewing bearing 5 and is embedded in the positioning plate 14. The positioning plate 14 is fixed to the slewing bearing 5 with bolts.

[0028] The mounting plate includes an integrally formed encoder mounting portion. This portion is hollow and communicates with the annular groove structure. A rotary encoder 8 is housed within the mounting portion. At least one tooth of the encoder gear 81 of the rotary encoder 8 passes through the communication portion and meshes with the external rotating gear 51 of the slewing bearing. This achieves a closed transmission for the angle sensor, ensuring corrosion and moisture resistance.

[0029] The mounting plate 4 and slewing bearing 5 are each equipped with a second passage for the oil cylinder pipe and wire to prevent entanglement. Although not labeled in the figure, it is illustrated so that those skilled in the art can easily see it. A detailed description will not be given here. A proximity switch 11 and a wire pressure gauge can also be installed at the bottom of the mounting plate 4.

[0030] In one embodiment, a guide member 12 is further mounted at the bottom of the mounting plate 4. This guide member 12 is movably mounted in a guide slot 95 defined in the center support 9, and its top is connected to the mounting plate 4 via a mounting platform 13. This ensures that when the hydraulic cylinder output drives the mounting mechanism to move up and down, the guide member rises and falls synchronously with the center support. When the center support swings within the housing, it drives the floating assembly to swing synchronously. When the housing moves with the drive wheels, the center support moves synchronously with the housing, thereby driving the floating assembly to move synchronously, thereby driving the loading vehicle or loading platform on the mounting mechanism to move. The guide member is composed of four cylindrical guide posts, each inserted into one of the four corresponding through-holes in the center support.

[0031] refer to Figure 5 , Figure 6 The present invention adopts a wheel-side planetary reducer with large traction bearing capacity and a small wheel diameter. The following is an explanation of the driving wheel 1 in one embodiment of the present invention: refer to Figure 5 / 6, the driving wheel 1 includes a running wheel 101, a hub flange 102, an axle seat 103, a sun gear shaft 104, a ring gear 105, a fixed gear 106, a first planetary gear set 107, a first sun gear 108, a first planetary carrier 109, a second planetary gear set 110, a second sun gear 111, and a second planetary carrier 112.

[0032] Driving mode: The motor drives the first transmission gear 201 to rotate, and drives the second transmission gear 202 meshing with the first transmission gear 201 to rotate, thereby driving the third transmission gear 114 meshing with the second transmission gear to rotate. The first transmission gear 201, the second transmission gear 202, and the third transmission gear 114 are installed in the mounting seat of the box body 3. When the sun gear shaft 104 is driven by the motor 2 according to the above-mentioned driving mode, the first sun gear 108 is driven to rotate by the sun gear shaft 104, thereby driving the first planetary gear set 107 to rotate in the ring gear 105, and the first planetary carrier 109 drives the second sun gear 111 to rotate, thereby driving the second planetary gear set 110 to rotate in the ring gear 105, thereby driving the second planetary carrier 112 and the hub flange 102 to rotate, thereby controlling the movement of the walking wheel.

[0033] refer to Figure 5 / 6. The interior of the traveling wheel 101 is a cavity that runs through from left to right and is provided with a flange 1011. The hub flange 102 is embedded in the cavity and is bolted to the flange 1011; the outer end of the hub flange is assembled with the second planetary carrier 112, and the inner end is tightly fitted with the axle seat 103 through a second oil seal; the sun gear shaft 104 is assembled on the axle seat 103, and one end passes through the axle seat and is connected to the first sun gear 108, and the other end passes through the axle seat and is connected to the third transmission gear 114, which is used to be driven by the motor in the above manner.

[0034] The inner wall of the ring gear 105 is provided with a first ring gear area 1051 and a second ring gear area 1052, and the first ring gear area and the second ring gear area are separated by a smooth area 1053. Each planetary gear in the first planetary gear set 107 has at least one tooth engaged with the first ring gear area 1051, and each planetary gear in the second planetary gear set 110 has at least one tooth engaged with the second ring gear area 1052. The first planetary carrier 109 is provided in the smooth area 1053 and is installed with the first planetary gear set 107.

[0035] A connecting tooth 115 is provided in the middle of the first planetary carrier 109, and the connecting tooth is engaged with the second sun gear 111; the above-mentioned first planetary gear set is driven by the first sun gear, and the second planetary gear set is driven by the second sun gear, and the second planetary gear set 110 is assembled on the second planetary carrier 112; the gear part of the fixed gear 106 is engaged with the ring gear 105, and is nested with a limiting gasket 113 connected to the ring gear, and the fixed gear is also connected to the shaft seat 103 by bolts.

[0036] It should be noted that the limiting washer 113 is disposed within the hub flange 102, and a bearing is provided on one side of the limiting washer 113; a bearing is also provided in the portion of the shaft seat that is embedded in the hub flange 102; and a bearing is also provided between the shaft seat and the sun gear shaft 104. Although not shown in the figures, those skilled in the art should be well aware of how the bearings are arranged in the above-described transmission method of the present invention based on the above-mentioned description.

Claims

1. A hydraulic floating planetary structure differential drive assembly, characterized in that: include: A drive assembly, consisting of a drive wheel and a motor that controls the movement of the drive wheel; A box body, on which the driving wheel and the motor are installed; When the motor controls the driving wheel to move, the box moves synchronously with the driving wheel; A central axis bracket is embedded in the box and can swing inside the box; A floating assembly is mounted on the center axis bracket and includes: An oil cylinder is embedded in the middle shaft support and the bottom end is mechanically fixed to the middle shaft support; A mounting mechanism is provided at the top of the center shaft support and is mechanically fixed to the top output end of the oil cylinder; A guide member, movably assembled on the central axis bracket, and the top end of which is connected to the mounting mechanism; So that: When the output end of the oil cylinder drives the mounting mechanism to perform lifting motion, the guide member rises and falls synchronously with the central axis bracket; When the middle axis bracket swings in the box, it drives the floating assembly to swing synchronously; When the box body moves following the driving wheel, the central axis bracket moves synchronously following the box body, thereby driving the floating assembly to move synchronously.

2. The hydraulic floating planetary structure differential drive assembly according to claim 1, characterized in that: The driving wheels include a first driving wheel and a second driving wheel, and the motor includes a first motor for controlling the first driving wheel to move and a second motor for controlling the second driving wheel to move, so as to realize differential driving.

3. The hydraulic floating planetary structure differential drive assembly according to claim 1, characterized in that: The box body includes a first cavity for accommodating the central axis bracket, a drive assembly mounting frame integrally formed at both ends of the box body, and an axis hole A for connecting the box body and the central axis bracket; The central axis passes through the axis hole A and is embedded in the corresponding axis hole B on the central axis bracket, so that the central axis bracket can swing along the circumferential direction of the central axis in the first cavity of the box.

4. The hydraulic floating planetary structure differential drive assembly according to claim 1, characterized in that: The central axis bracket includes a second cavity for accommodating the oil cylinder, a guide groove for assembling a guide member, and an axial hole B for connecting to the box body. A bottom plate is provided in the second cavity, and the bottom plate divides the second cavity into an upper chamber and a lower chamber. The upper chamber is used to assemble the oil cylinder.

5. The hydraulic floating planetary structure differential drive assembly according to claim 1, characterized in that: The mounting mechanism includes a mounting plate, a slewing bearing, and a positioning plate. A first passage is provided in the middle of the mounting plate for the oil cylinder to pass through. The top of the mounting plate is an annular groove structure, in which the slewing bearing is embedded. The gap between the slewing bearing and the annular groove structure is sealed by a first oil seal. The top output end of the oil cylinder passes through the slewing bearing and is embedded in the positioning plate. The positioning plate is mechanically fixed to the slewing bearing. The mounting plate and the slewing bearing are both provided with a second passage for the oil cylinder pipe and the wire to pass through, so as to prevent entanglement.

6. The hydraulic floating planetary structure differential drive assembly according to claim 5, characterized in that: The mounting plate also includes an encoder mounting portion integrally formed therewith, the interior of the encoder mounting portion is hollow and communicated with the annular groove structure, a rotary encoder is provided in the encoder mounting portion, at least one tooth of the encoder gear of the rotary encoder passes through the communicating portion and engages with the rotating external tooth of the slewing bearing.

7. The hydraulic floating planetary structure differential drive assembly according to claim 1, characterized in that: The driving wheel includes a traveling wheel, a hub flange, an axle seat, a sun gear shaft, a ring gear, a fixed gear, a first planetary gear set, a first sun gear, a first planetary carrier, a second planetary gear set, a second sun gear, and a second planetary carrier. When the sun gear shaft is driven by the motor, it drives the first sun gear to rotate, thereby driving the first planetary gear set to rotate in the ring gear. The first planetary carrier drives the second sun gear to rotate, thereby driving the second planetary gear set to rotate in the ring gear, thereby driving the second planetary carrier and the hub flange to rotate, thereby controlling the movement of the traveling wheel.

8. The hydraulic floating planetary structure differential drive assembly according to claim 7, characterized in that: The interior of the traveling wheel is a cavity that runs through the left and right sides and is provided with a flange. The hub flange is embedded in the cavity and fixedly connected to the flange. The outer end of the hub flange is assembled with the second planetary carrier, and the inner end is tightly fitted with the axle seat through a second oil seal. The sun gear shaft is assembled on the axle seat, and one end passes through the axle seat and is connected to the first sun gear, and the other end passes through the axle seat and is connected to the third transmission gear for being driven by the motor.

9. The hydraulic floating planetary structure differential drive assembly according to claim 7, characterized in that: The inner wall of the gear ring is provided with a first ring gear area and a second ring gear area, and the first ring gear area and the second ring gear area are separated by a smooth area. Each planetary gear in the first planetary gear set has at least one tooth engaged with the first ring gear area, and each planetary gear in the second planetary gear set has at least one tooth engaged with the second ring gear area. The first planet is mounted on the smooth area and the first planetary gear set is installed.

10. The hydraulic floating planetary structure differential drive assembly according to claim 7, characterized in that: A connecting tooth is provided in the middle of the first planetary carrier, and the connecting tooth is engaged with the second sun gear; the first planetary gear set is driven by the first sun gear, the second planetary gear set is driven by the second sun gear, and the second planetary gear set is assembled on the second planetary carrier; the gear part of the fixed gear is engaged with the ring gear, and a limiting gasket connected to the ring gear is nested therein, and the fixed gear is also connected to the shaft seat by bolts.

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