Auxiliary Rim and Wheeled Walking Device

Abstract

The present invention relates to a wheel mounting connection member. To solve the problem that it is inconvenient to switch between dual tires and single tires at the end of the axle of an existing wheeled excavator, the present invention constructs an auxiliary rim and a wheeled walking device. In the auxiliary rim, the fixing structure includes a mounting flange and a first cylindrical member. The axially inner end of the first cylindrical member is fixedly connected to the mounting flange and they are coaxially arranged; the switching structure includes a rim connection flange and a second cylindrical member. The axially outer end of the second cylindrical member is fixedly connected to the rim connection flange and they are coaxially arranged; the axially inner end of the second cylindrical member is inserted and sleeved with the axially outer end of the first cylindrical member; a locking device is used to lock and connect the first cylindrical member and the second cylindrical member that are inserted and sleeved together to limit the second cylindrical member from moving axially outward relative to the first cylindrical member. The auxiliary rim of the present invention is used in a wheeled walking device, and the conversion operation between the single-tire structure and the dual-tire structure of the axle is simple and convenient, and the disassembly and assembly of the inner wheel are not involved during the conversion.

Description

Technical Field

[0001] The present invention relates to a wheel mounting connection member, and more specifically, to an auxiliary rim and a wheeled walking device. Background Art

[0002] At present, most wheeled excavators adopt a dual-tire structure at the end of the axle. The rims of the inner wheel and the outer wheel are directly clamped and fixed on the hub at the end of the axle by an annular matrix of bolts. The dual-tire structure increases the contact area with the ground to improve stability and increases the passability of the wheeled excavator when driving on muddy roads. However, at the same time, the dual-tire structure increases the driving resistance, reduces the driving speed of the wheeled excavator on paved roads, and increases fuel consumption.

[0003] For the disassembly and assembly operations of converting the dual-tire to single-tire or single-tire to dual-tire of the existing wheeled excavator, it is necessary to disassemble and assemble multiple bolts, which is inconvenient to operate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an auxiliary rim and a wheeled walking device for the problem that it is inconvenient to switch between the dual-tire and single-tire at the end of the axle of the wheeled excavator, so that the end of the axle of the wheeled walking device can be quickly and conveniently switched between the dual-tire and the single-tire.

[0005] The technical solution for the present invention to achieve its purpose is as follows: An auxiliary rim is constructed, which is characterized by including a fixing structure, a quick-change structure, and a locking device;

[0006] The fixing structure includes a mounting flange and a first cylindrical member. The axial inner end of the first cylindrical member is fixedly connected to the mounting flange and the two are coaxially arranged;

[0007] The quick-change structure includes a rim connection flange and a second cylindrical member. The axial outer end of the second cylindrical member is fixedly connected to the rim connection flange and the two are coaxially arranged; The axial inner end of the second cylindrical member is inserted and sleeved with the axial outer end of the first cylindrical member;

[0008] The locking device is used to lock and connect the first cylindrical member and the second cylindrical member that are inserted and sleeved together to limit the second cylindrical member from moving axially outward relative to the first cylindrical member.

[0009] In the present invention, the auxiliary rim is used to install the outer wheel on the outside of the inner wheel at the end of the axle. Among them, the mounting flange is used to be fixedly connected to the axle hub, and the rim connection flange is used to be fixedly connected to the rim of the outer wheel. When it is necessary to convert to a single-tire structure, after releasing the locking device, the outer wheel and the quick-change structure can be disassembled to achieve it. The conversion operation between the single-tire structure and the dual-tire structure is simple and convenient, and the disassembly and assembly of the inner wheel are not involved during the conversion.

[0010] In the present invention, the "axial inner end" and "axial outer end" refer to the central axes of the first cylinder member and the second cylinder member, that is, the wheel axis after the auxiliary rim is installed on the axle. The "inner end" refers to the end facing the axle center after the auxiliary rim is installed on the axle, and the "outer end" is the end opposite to the "inner end".

[0011] In the auxiliary rim of the present invention, the locking device includes a lead screw rotatably arranged in the second cylinder member, a lead screw nut axially slidably connected to the second cylinder member, and a plurality of hooks; the lead screw is parallel or coincident with the central axis of the second cylinder member; the hooks are circumferentially spaced around the lead screw nut, and the first end of each hook is rotatably connected to the lead screw nut through a first pin shaft so that the second end of the hook can swing around the first pin shaft in the plane where the central axis of the second cylinder member is located, and the second end of each hook has a hook portion; on the first cylinder member, there are hook buckles corresponding to the hooks one by one and cooperating with the hook portions.

[0012] In the auxiliary rim of the present invention, for each of the hooks, a support is provided on the second cylinder member, a guide pin is provided on the support, a long guide hole for accommodating the guide pin is provided on the hook, and the distance between the axial outer end of the long guide hole and the central axis of the second cylinder member is greater than the distance between the axial inner end of the long guide hole and the central axis of the second cylinder member.

[0013] In the auxiliary rim of the present invention, an axial through hole is provided at the center of the rim connection flange, and a bearing for rotatably mounting the lead screw is installed in the axial through hole.

[0014] In the auxiliary rim of the present invention, the hook buckle is composed of a hole provided on the first cylinder member, and the axial outer hole wall of the hole is a hook buckle support surface that contacts and acts on the hook portion.

[0015] In the auxiliary rim of the present invention, the hook portion of the hook is provided with a support block installed through a second pin shaft, the second pin shaft is parallel to the first pin shaft, the hook buckle support surface is a plane, and the support block has a hook portion support surface that fits with the hook buckle support surface.

[0016] In the auxiliary rim of the present invention, an auxiliary clamping block for cooperating with the hook portion support surface is fixedly installed on the first cylinder member at the position where the hole is provided, and the clamping block support surface of the auxiliary clamping block for contacting the hook portion support surface is flush with the hook buckle support surface.

[0017] In the auxiliary rim of the present invention, the axially inner end of the second cylindrical member and the auxiliary clamping block are respectively located on the radially inner side and the radially outer side of the first cylindrical member; or the axially inner end of the second cylindrical member and the auxiliary clamping block are both located on the radially inner side or the radially outer side of the first cylindrical member, and an avoidance groove for avoiding the auxiliary clamping block is provided on the second cylindrical member.

[0018] In the auxiliary rim of the present invention, both the first cylindrical member and the second cylindrical member are regular prismatic; the regular prismatic first cylindrical member and second cylindrical member can be accurately positioned during socket connection and can prevent relative rotation between the two, thereby achieving torque transmission.

[0019] The first cylindrical member and the second cylindrical member may also be both cylindrical; a plurality of guiding blocks are fixedly installed on the cylindrical first cylindrical member, and the plurality of guiding blocks are circumferentially and evenly distributed on the outer cylindrical surface of the first cylindrical member. Guiding grooves corresponding to the respective guiding blocks are provided on the cylindrical second cylindrical member. The cooperation between the guiding blocks and the guiding grooves can enable the hook and the hook buckle to be accurately aligned when the second cylindrical member is socket-connected to the first cylindrical member, and can also prevent the second cylindrical member from rotating relative to the first cylindrical member after the fixed structure and the quick-change structure are connected, thereby achieving the function of torque transmission.

[0020] The technical solution for the present invention to achieve its purpose is as follows: A wheeled walking device is constructed, at least one axle in its axle is a dual-tire axle, an inner wheel and an outer wheel are installed at the end of the dual-tire axle, and it is characterized in that the aforementioned auxiliary rim is installed at the end of the dual-tire axle, the mounting flange and the rim of the inner wheel are both fixedly connected to the hub of the dual-tire axle, the rim of the outer wheel is fixedly connected to the rim connection flange, and the inner wheel abuts against the outer wheel.

[0021] Compared with the prior art, the auxiliary rim of the present invention is used in a wheeled walking device, and the conversion operation between the single-tire structure and the dual-tire structure of the axle is simple and convenient, and the disassembly and assembly of the inner wheel are not involved during the conversion. Description of the Drawings

[0022] Figure 1 It is a schematic structural view of the auxiliary rim of the present invention when installed on the axle.

[0023] Figure 2 It is an exploded view of the auxiliary rim of the present invention when installed on the axle.

[0024] Figure 3 It is a schematic structural view of the fixed structure in the auxiliary rim of the present invention.

[0025] Figure 4 It is a sectional view of the quick-change structure in the auxiliary rim of the present invention.

[0026] Figure 5 It is a cross-sectional view of the locking device in the auxiliary rim of the present invention when it is in the unlocked state.

[0027] Figure 6 It is a cross-sectional view of the locking device in the auxiliary rim of the present invention when it is in the locked state.

[0028] Figure 7 It is a schematic structural view of the locking device in the auxiliary rim of the present invention when it is in the locked state.

[0029] Names and serial numbers of components in the figure:

[0030] Axle 1, wheel hub 11, inner wheel rim 12, outer wheel rim 13.

[0031] Fixing structure 4, mounting flange 41, first cylindrical component 42, hook 43, hook support surface 431, auxiliary block 44, block support surface 441, guide block 45.

[0032] Quick-change structure 5, rim connection flange 51, second cylindrical component 52, support 53, axial through hole 54, rib 55, guide pin 56, guide groove 57, avoidance groove 58.

[0033] Locking device 6, lead screw 61, lead screw nut 62, hook 63, support block 64, hook support surface 641, first pin shaft 65, second pin shaft 66, bearing 67, guide long hole 68. Specific embodiments

[0034] The following describes specific implementation schemes with reference to the accompanying drawings.

[0035] Figure 1 Figure 2 The auxiliary rim of the embodiment of the present invention is shown to include a fixing structure 4, a quick-change structure 5, and a locking device 6.

[0036] As Figure 3 shown, the fixing structure 4 includes a mounting flange 41 and a first cylindrical component 42. The axial inner end of the first cylindrical component 42 is fixedly connected to the mounting flange 41 and they are coaxially arranged.

[0037] As Figure 4 shown, the quick-change structure 5 includes a rim connection flange 51 and a second cylindrical component 52. The axial outer end of the second cylindrical component 52 is fixedly connected to the rim connection flange 51 and they are coaxially arranged.

[0038] As Figure 1 Figure 2 shown, both the first cylindrical component 42 and the second cylindrical component 52 are cylindrical components. The axial inner end of the second cylindrical component 52 is inserted and sleeved with the axial outer end of the first cylindrical component 41. And the second cylindrical component 52 is located radially outside the first cylindrical component 42.

[0039] In the present invention, the "axial inner end" and "axial outer end" are such that "axial" refers to the central axis of the first cylinder member and the second cylinder member, which is also the wheel axis after the auxiliary rim is mounted on the axle. The "inner end" refers to the end facing the center of the axle after the auxiliary rim is mounted on the axle, and the "outer end" is the end opposite to the "inner end".

[0040] Three guiding blocks 45 are fixedly mounted on the first cylinder member 42 (the number of guiding holes can be set as required, usually two to four), and the three guiding blocks 45 are circumferentially and evenly spaced on the cylindrical outer side surface of the first cylinder member 42. As Figure 7 shown, guiding grooves 57 corresponding to and cooperating with the respective guiding blocks 45 are provided on the second cylinder member 52. The cooperation between the guiding blocks 45 and the guiding grooves 57 enables the second cylinder member 52 to be inserted and connected to the first cylinder member 42 in a fixed posture when the second cylinder member 52 is inserted into the first cylinder member 42, realizing the precise alignment and connection of relevant components. At the same time, it can also prevent the second cylinder member 52 from rotating relative to the first cylinder member 42 after the fixed structure 4 and the quick-change structure 5 are connected, thereby realizing the function of torque transmission.

[0041] In the embodiment of the present invention, the first cylinder member 42 and the second cylinder member 52 can also be regular prismatic; the regular prismatic first cylinder member 42 and second cylinder member 52 can be precisely positioned during the insertion connection and can prevent relative rotation between the two, thereby realizing torque transmission. When using regular prismatic first and second cylinder members, there is no need to provide guiding blocks and guiding grooves on the first and second cylinder members.

[0042] As Figure 4 shown, the locking device 6 includes a lead screw 61 rotatably arranged in the second cylinder member, a lead screw nut 62 axially and translationally connected to the second cylinder member 52, and three hooks 63 (the number can be increased or decreased as required, usually three to four).

[0043] An axial through hole 54 is provided at the center of the rim connection flange 51, and a bearing 67 is installed in the axial through hole 54. The outer end of the lead screw 61 is fixed in the inner hole of the inner ring of the bearing 67. The lead screw 61 coincides with the central axis of the second cylinder member 52 and is rotatably installed on the quick-change structure 5 through the bearing 67.

[0044] In this embodiment, the three hooks 63 are circumferentially and evenly spaced around the lead screw nut 62. The first end of each hook 63 is rotatably connected to the lead screw nut 62 through a first pin shaft 65, so that the second end of the hook 63 can swing around the first pin shaft 65 in the plane where the central axis of the second cylinder member 52 is located. The second end of each hook 63 has a hook portion; hook catches 43 corresponding to the hooks and cooperating with the hook portions are provided on the first cylinder member 42.

[0045] As Figure 3 Figure 5 shown, the hook 43 on the first cylinder member 42 is formed by a hole provided on the first cylinder member 42. The hole is a rectangular hole, and the axially outer hole wall thereof is a hook support surface 431 that contacts and acts with the hook portion.

[0046] As Figure 4 Figure 5 shown, the hook portion of the hook 63 is provided with a support block 64 mounted through a second pin shaft 66. The second pin shaft 66 is parallel to the first pin shaft 65. The hook support surface 431 is a plane, and the support block 64 is provided with a hook portion support surface 641 that fits with the hook support surface 431. By providing the support block 64 that rotates around the second pin shaft 66, when the hook 63 is connected and cooperated with the hook 43, the support block 64 can adaptively adjust its posture, so that the contact surface between the hook 63 and the hook 431 is always a plane contact, that is, when the locking device is locked, the hook portion support surface 641 always fits with the hook support surface 431.

[0047] As Figure 3 Figure 5 shown, an auxiliary block 44 for cooperating with the hook portion support surface 641 is fixedly installed at the position where the hole is provided on the first cylinder member 42. The auxiliary block 44 is located on the radially outer side of the first cylinder member 42. The block support surface 441 of the auxiliary block 44 for contacting the hook portion support surface 641 is flush with the hook support surface 431. By providing the auxiliary block 44, the contact area of the fixed structure 4 in contact with the hook 63 when the locking device is locked is increased.

[0048] In the present invention, the auxiliary block 44 can be fixedly installed on the radially outer side of the first cylinder member 42 or can be fixedly installed on the radially inner side of the first cylinder member 42. In addition, the inner end of the second cylinder member 52 can be sleeved on the radially outer side of the first cylinder member 42 or can be inserted into the radially inner side of the first cylinder member 42. When the second cylinder member 52 and the auxiliary block 44 are both located on the radially inner side of the first cylinder member 42 or both located on the radially outer side of the first cylinder member 42, an avoidance groove 58 for avoiding the auxiliary block needs to be provided on the second cylinder member 52, so that when the locking device is unlocked, the second cylinder member 52 and the first cylinder member 42 can be inserted into each other without interference.

[0049] As Figure 4 Figure 5 shown, corresponding to each hook 63, a support 53 is provided on the second cylinder member. The support 53 is fixed to the rib 55 on the inner wall of the second cylinder member 52 by bolts. A guide pin 56 is provided on the support 53, and a guide long hole 68 for accommodating the guide pin is provided on the hook 63. The axially outer end of the guide long hole 68 ( Figure 5The distance between the position where the middle guide pin is located and the central axis of the second cylinder member 52 is greater than the distance between the axially inner end of the guide slot and the central axis of the second cylinder member.

[0050] As Figure 4 Figure 5 shown, when the lead screw 61 is rotated and the lead screw nut 62 moves from the axially outer end to the axially inner end (the lead screw nut moves towards the fixed structure), the hook 63 follows the lead screw nut 62 and moves from the axially outer end to the axially inner end. The hook supporting surface 641 of the support block 64 is disengaged from the hook fastening supporting surface 431. At the same time, the position of the guide pin 56 in the guide slot 68 moves to the axially outer end of the guide slot 68 (as shown in Figure 5 ), due to the interaction between the guide pin 56 and the guide slot 68, the second end (the end where the hook part is provided) of the hook 63 moves towards the inside of the first cylinder member 42 and retracts from the hook buckle 43 (hole) into the first cylinder member 42, and the locking device 6 is unlocked. The second cylinder member 52 can move relative to the first cylinder member 42 towards the outer end and separate from the first cylinder member 42. Correspondingly, when the lead screw 61 is rotated in the reverse direction, the lead screw nut 62 moves towards the axially outer end. While the hook part of the hook 63 moves towards the axially outer end, it also extends into the hook buckle 43 (hole), and the hook supporting surface 641 of the support block 64 contacts the hook fastening supporting surface 641. Since the first cylinder member 4 is a fixed member, the hook 63 pulls the quick-change structure 5 towards the axially inner end through the lead screw nut 62, the lead screw 61, and the bearing 67 until the outer tire on the quick-change structure 5 abuts against the inner tire, or clamps the rubber ring between the inner and outer tires, thus realizing locking and fixing the quick-change structure on the fixed structure.

[0051] An embodiment of the present invention provides a wheeled walking device, such as a wheeled excavator. At least one axle 1 in the axle of the wheeled walking device is a dual-tire axle (in a wheeled excavator, both axles are of dual-tire structure during its working state). As Figure 1 Figure 2 shown, the inner wheel and the outer wheel are installed at the end of the dual-tire axle, and the aforementioned auxiliary rim is installed at the end of the dual-tire axle. The mounting flange 41 and the inner wheel rim 12 are both fixedly connected to the hub 11 of the dual-tire axle through bolts, and the outer wheel rim 13 is fixedly connected to the rim connection flange 51. The inner wheel abuts against the outer wheel. Usually, the inner wheel rim 12 is in direct or indirect contact connection with the outer wheel rim 13 (a spacer is placed between them).

[0052] In the wheeled walking device of the present invention, a double-tire structure is adopted for the axle during operation to increase its grip and stability. When the wheeled walking device is moving, to improve its passability and reduce the walking resistance, it is desired that the end of the axle be a single-tire structure. At this time, the lead screw is rotated to unlock the locking device, and the quick-change structure is disassembled from the fixed structure, so that the inner wheel of the axle end is removed and the single-tire structure is switched. Correspondingly, when converting from a single-tire structure to a double-tire structure, only the quick-change structure equipped with the outer wheel needs to be docked with the fixed structure and the lead screw is rotated to lock. During the switching process between the double-tire structure and the single-tire structure at the end, only the locking device needs to be operated, and there is no need to disassemble and assemble the inner wheel, and the switching operation is simple and convenient.

Claims

1. An auxiliary rim, characterized in that It includes a fixed structure, a quick-change structure, and a locking device; The fixed structure includes a mounting flange and a first cylindrical component. The axial inner end of the first cylindrical component is fixedly connected to the mounting flange and they are coaxially arranged; The quick-change structure includes a rim connection flange and a second cylindrical component. The axial outer end of the second cylindrical component is fixedly connected to the rim connection flange and they are coaxially arranged; The axial inner end of the second cylindrical component is inserted and sleeved with the axial outer end of the first cylindrical component; The locking device is used to lock and connect the first cylindrical component and the second cylindrical component that are inserted and sleeved together to limit the axial outward movement of the second cylindrical component relative to the first cylindrical component; The locking device includes a lead screw rotatably arranged in the second cylindrical component, a lead screw nut axially translationally connected to the second cylindrical component, and a plurality of hooks; The lead screw is parallel or coincident with the central axis of the second cylindrical component; Each hook is circumferentially spaced around the lead screw nut. The first end of each hook is rotatably connected to the lead screw nut through a first pin shaft so that the second end of the hook can swing around the first pin shaft in the plane where the central axis of the second cylindrical component is located. The second end of each hook has a hook portion; On the first cylindrical component, there are hook buckles corresponding to the hooks one by one and cooperating with the hook portions.

2. The auxiliary rim according to claim 1, characterized in that For each of the hooks, a support is provided on the second cylindrical component. A guide pin is provided on the support, and a long guide hole for accommodating the guide pin is provided on the hook. The distance from the axial outer end of the long guide hole to the central axis of the second cylindrical component is greater than the distance from the axial inner end of the long guide hole to the central axis of the second cylindrical component.

3. The auxiliary rim according to claim 1, characterized in that An axial through hole is provided at the center of the rim connection flange, and a bearing for rotatably mounting the lead screw is installed in the axial through hole.

4. The auxiliary rim according to any one of claims 1 to 3, characterized in that The hook buckle is composed of a hole provided on the first cylindrical component. The axial outer hole wall of the hole is a hook buckle support surface that contacts and acts with the hook portion.

5. The auxiliary rim according to claim 4, characterized in that The hook portion of the hook is provided with a support block installed through a second pin shaft. The second pin shaft is parallel to the first pin shaft. The hook buckle support surface is a plane, and the support block has a hook portion support surface that fits with the hook buckle support surface.

6. The auxiliary rim according to claim 5, characterized in that On the first cylindrical component, an auxiliary clamping block for cooperating with the hook portion support surface is fixedly installed at the position where the hole is provided. The clamping block support surface of the auxiliary clamping block for contacting the hook portion support surface is flush with the hook buckle support surface.

7. The auxiliary rim according to claim 6, characterized in that The axial inner end of the second cylindrical component and the auxiliary clamping block are respectively located on the radial inner side and the radial outer side of the first cylindrical component; Or the axial inner end of the second cylindrical component and the auxiliary clamping block are both located on the radial inner side or the radial outer side of the first cylindrical component. An avoidance groove for avoiding the auxiliary clamping block is provided on the second cylindrical component.

8. The auxiliary rim according to any one of claims 1 to 3, characterized in that Both the first cylindrical component and the second cylindrical component are regular prismatic; Or both the first cylindrical component and the second cylindrical component are cylindrical; A plurality of guide blocks are fixedly installed on the cylindrical first cylindrical component. The plurality of guide blocks are circumferentially and evenly distributed on the outer cylindrical surface of the first cylindrical component. Guide grooves corresponding to each of the guide blocks are provided on the cylindrical second cylindrical component.

9. A wheeled walking device, at least one axle of the vehicle axle is a double-tire axle, and an inner wheel and an outer wheel are installed at the end of the double-tire axle, characterized in that An auxiliary rim according to any one of claims 1 to 8 is installed at the end of the twin axle. The mounting flange and the rim of the inner wheel are both fixedly connected to the hub of the twin axle. The rim of the outer wheel is fixedly connected to the rim connection flange, and the inner wheel abuts against the outer wheel.

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