A tire changer hub motor locking device

Abstract

The utility model discloses a kind of tire dismounting machine wheel hub electric locking device, belong to tire dismounting machine technical field.The wheel hub electric locking device subverts traditional pneumatic or is manually tightened type's wheel hub locking structure, by control hollow motor, rotating screw sleeve can be rotated, driving lifting screw sleeve lifting, then the puller on lifting screw sleeve can be locked or be released from limiting along with the lifting of lifting screw sleeve, by monitoring and control to hollow motor current, the pulling force of puller to lock pin downwards can be easily controlled, and then the clamping force of lock pin to wheel hub is easily controlled, design scientific and reasonable, control conveniently.

Description

Technical Field

[0001] This utility model relates to the field of tire changer technology, specifically a wheel hub electric locking device for a tire changer. Background Technology

[0002] Tire changers are essential equipment in auto repair shops and 4S dealerships, used to change tires on various vehicles such as cars, motorcycles, and heavy trucks. During tire changing, a wheel rim locking device on the tire changer is needed to lock the wheel rim. Currently, most wheel rim locking devices are pneumatically driven, with a cylinder driving the gripper to lock the locking pin. However, using a cylinder-driven device lacks flexibility in controlling the clamping force on the wheel rim, presenting certain drawbacks. Utility Model Content

[0003] The purpose of this invention is to provide an electric wheel hub locking device for a tire changer to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An electric wheel hub locking device for a tire changer includes a housing, a main shaft, and a locking pin. The main shaft passes through the housing and is rotatably connected to it. A locking pin insertion hole is provided at the upper end of the main shaft, and a wheel hub placement plate is fixedly mounted at the upper end of the main shaft. A locking groove is provided at the lower end of the locking pin, which passes through the wheel hub placement plate and is inserted into the locking pin insertion hole. The device also includes a lifting threaded sleeve sleeved on the main shaft and slidably connected to it. A rotating threaded sleeve is rotatably mounted on the main shaft and sleeved outside the lifting threaded sleeve. The rotating threaded sleeve is threadedly connected to the lifting threaded sleeve. A drive motor assembly for driving the rotating threaded sleeve to rotate is provided inside the housing. A pull claw assembly is provided at the upper end of the lifting threaded sleeve. A side hole communicating with the locking pin insertion hole is provided on the side wall of the main shaft. When the lifting threaded sleeve descends, the pull claw assembly can lock and limit the locking groove through the side hole. When the lifting threaded sleeve rises, the pull claw assembly can release the limitation on the locking groove.

[0005] As a further preferred embodiment of this utility model: the drive motor assembly includes a hollow motor fixedly installed inside the housing, a main shaft passing through the hollow motor and rotatably connected to the hollow motor, a rotating connecting sleeve sleeved on the outside of the main shaft fixedly connected to the lower end of the rotating threaded sleeve, and the hollow motor driving the rotating connecting sleeve to rotate through a planetary gear set.

[0006] As a further preferred embodiment of this utility model: the planetary gear set includes a sun gear fixedly sleeved on the output end of the hollow motor, and a plurality of planet gears meshing with the sun gear are evenly arranged on the outer side of the sun gear. The planet gears are rotatably mounted on the upper end of the hollow motor, and an outer gear ring meshing with the planet gears is fixedly arranged on the lower end of the inner side of the rotating connecting sleeve.

[0007] As a further preferred embodiment of this utility model: the pull claw assembly includes a rotating arc plate rotatably disposed on the outside of the lifting threaded sleeve, a pull claw corresponding to the side hole is fixedly connected to the rotating arc plate, a fixed shaft rotatably connected to the rotating arc plate is fixedly disposed on the lifting threaded sleeve, and a torsion spring connected to the rotating arc plate is disposed on the fixed shaft for moving the pull claw toward the side closer to the main shaft. The upper end of the pull claw can pass through the side hole and be inserted into the locking groove. The top of the pull claw is provided with an inclined surface corresponding to the top of the side hole. When the pull claw moves upward, the top of the side hole can push the pull claw out of the side hole through the inclined surface.

[0008] As a further preferred embodiment of this utility model: two side holes, two rotating arc plates, and two pull claws are symmetrically arranged, and the two rotating arc plates rotate coaxially through a fixed shaft.

[0009] As a further preferred embodiment of this utility model: a corresponding guide opening is provided on the outer wall of the lifting threaded sleeve, and a guide pin is fixedly provided on the outer wall of the main shaft. The guide pin is inserted into the guide opening and slidably connected to the guide opening.

[0010] As a further preferred embodiment of this utility model: an inner convex ring is fixedly provided on the lower inner side of the rotating threaded sleeve and sleeved on the outside of the main shaft. Tapered bearings sleeved on the main shaft are provided on both the upper and lower sides of the inner convex ring. Bearing holders and locking nuts are respectively located on the upper and lower sides of the two tapered bearings on the main shaft.

[0011] As a further preferred embodiment of this utility model: both the upper and lower ends of the outer shell are rotatably connected to the main shaft via bearings.

[0012] As a further preferred embodiment of this utility model: a dustproof protrusion plate corresponding to the side hole is fixedly provided on the lifting threaded sleeve. When the pull claw is lifted away from the side hole, the dustproof protrusion plate can cover the side hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This electric wheel hub locking device revolutionizes the traditional pneumatic or manual tightening wheel hub locking structure. By controlling a hollow motor, the rotating threaded sleeve can be rotated, which in turn drives the lifting threaded sleeve to rise and fall. The pull claw on the lifting threaded sleeve, in conjunction with the side hole, can lock or release the locking pin as the lifting threaded sleeve rises and falls. By monitoring and controlling the current of the hollow motor, the downward pulling force of the pull claw on the locking pin can be easily controlled, thereby easily controlling the clamping force of the locking pin on the wheel hub. The design is scientific and reasonable, and the operation is convenient. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of the electric wheel hub locking device for the tire changer of this utility model; Figure 2This is a cross-sectional structural schematic diagram of the electric wheel hub locking device of the tire changer of this utility model; Figure 3 This is a three-dimensional structural diagram of the present invention with the outer shell omitted; Figure 4 This is a three-dimensional structural diagram of the lifting threaded sleeve and pull claw of this utility model after assembly; Figure 5 This is a three-dimensional structural diagram of the main shaft of this utility model; Figure 6 This is a three-dimensional structural diagram of the planetary gear set of this utility model; Figure 7 This is a three-dimensional structural diagram of the electric wheel hub locking device of the tire mounting and dismounting machine of this utility model.

[0015] In the diagram: 1. Housing; 2. Main shaft; 3. Hollow motor; 4. Planetary gear set; 5. Rotary connecting sleeve; 6. Rotary threaded sleeve; 7. Lifting threaded sleeve; 8. Pull claw; 9. Locking pin insertion hole; 10. Side hole; 11. Fixed shaft; 12. Guide pin; 13. Hub placement plate; 14. Locking pin; 15. Tapered bearing; 16. Rotating arc plate; 17. Dustproof protrusion plate; 18. Guide port; 19. Inclined surface; 20. Sun gear; 21. Planetary gears; 22. External gear ring; 23. Lock groove; 24. Bearing; 25. Locking nut; 26. Inner convex ring; 27. Bearing clamp. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figure 1-7 This embodiment provides an electric wheel hub locking device for a tire changer, including a housing 1, a main shaft 2, and a locking pin 14. The main shaft 2 passes through the housing 1 and is rotatably connected to it. As a conventional design, both the upper and lower ends of the housing 1 are rotatably connected to the main shaft 2 via bearings 24. A locking pin insertion hole 9 is provided at the upper end of the main shaft 2, and a wheel hub placement plate 13 is fixedly mounted on the upper end of the main shaft 2. A locking groove 23 is provided at the lower end of the locking pin 14, and the lower end of the locking pin 14 passes through the wheel hub placement plate 13 and is inserted into the locking pin insertion hole 9. The above structure is a conventional component of wheel hub locking devices familiar to those skilled in the art. By placing the wheel hub on the wheel hub placement plate 13, inserting the locking pin 14 through the wheel hub into the locking pin insertion hole 9 at the upper end of the main shaft 2, and then locking the locking pin insertion hole 9, the wheel hub can be locked and fixed using the locking pin 14. Figure 2 , Figure 3 As shown, the top of the locking pin 14 is a protruding conical lock head, which is a conventional structure familiar to those skilled in the art, and will not be described or limited further in this application.

[0018] To achieve locking of the locking pin 14, such as Figure 1 , Figure 2 As shown, it also includes a lifting threaded sleeve 7 sleeved on the main shaft 2 and slidably connected to the main shaft 2. A rotating threaded sleeve 6 is rotatably mounted on the main shaft 1, sleeved outside the lifting threaded sleeve 7, and threadedly connected to the lifting threaded sleeve 7. A drive motor assembly for driving the rotating threaded sleeve 6 to rotate is provided inside the outer casing 1. Specifically, the drive motor assembly includes a hollow motor 3 fixedly mounted inside the outer casing 1. The main shaft 2 passes through the hollow motor 3 and is rotatably connected to the hollow motor 3. A rotating connecting sleeve 5 sleeved outside the main shaft 2 is fixedly connected to the lower end of the rotating threaded sleeve 6. The hollow motor 3 drives the rotating connecting sleeve 5 to rotate through a planetary gear set 4. Wherein, as... Figure 2 and Figure 6 As shown, the planetary gear set 4 includes a sun gear 20 fixedly sleeved on the output end of the hollow motor 3. Multiple planet gears 21, meshing with the sun gear 20, are evenly arranged on the outer side of the sun gear 20. The planet gears 21 are rotatably mounted on the upper end of the hollow motor 3. An external gear ring 22, meshing with the planet gears 21, is fixedly mounted on the lower inner side of the rotating connecting sleeve 5. The hollow motor 3 drives the sun gear 2 to rotate, which in turn drives the central planet gears 21 to rotate. The planet gears 21 then drive the external gear ring 22 to rotate, thereby realizing the rotation of the rotating connecting sleeve 5, and consequently, the rotation of the rotating threaded sleeve 5.

[0019] Furthermore, in order to achieve the up-and-down sliding of the lifting threaded sleeve 7 on the main shaft 2, such as... Figure 3 As shown, a corresponding guide opening 18 is provided on the outer wall of the lifting threaded sleeve 7, and a guide pin 12 is fixedly provided on the outer wall of the main shaft 2. The guide pin 12 is inserted into the guide opening 18 and slidably connected to the guide opening 18. Preferably, as a conventional design, there are two guide openings 18 and two guide pins 12 symmetrically arranged.

[0020] Furthermore, a claw assembly is provided at the upper end of the lifting threaded sleeve 7, and a side hole 10 communicating with the locking pin insertion hole 9 is provided on the side wall of the main shaft 2. When the lifting threaded sleeve 7 descends, the claw assembly can lock and limit the locking groove 23 through the side hole 10; when the lifting threaded sleeve 7 rises, the claw assembly can release the limitation on the locking groove 23. Specifically, as shown... Figure 3 , Figure 4As shown, the pull claw assembly includes a rotating arc plate 16 rotatably disposed outside the lifting threaded sleeve 7. A pull claw 8 corresponding to the side hole 10 is fixedly connected to the rotating arc plate 16. A fixed shaft 11 rotatably connected to the rotating arc plate 6 is fixedly disposed on the lifting threaded sleeve 7. A torsion spring connected to the rotating arc plate 6 is disposed on the fixed shaft 11, which is used to move the pull claw 8 towards the side of the main shaft 2. When the lifting threaded sleeve 7 drives the pull claw 8 to move downward, under the action of the torsion spring, the upper end of the pull claw 8 can pass through the side hole 10 and be inserted into the locking groove 23. An inclined surface 19 corresponding to the top of the side hole 10 is provided on the top of the pull claw 8. When the pull claw 8 moves upward, the top of the side hole 10 can push the pull claw 8 out of the side hole 10 through the inclined surface 19. At the same time, the lower end of the claw head of the pull claw 8 should be a horizontal plane to facilitate entry and exit from the locking groove 23. The overall shape of the pull claw 8 should be a conventional structural design familiar to those skilled in the art, and this application will not elaborate on or limit it further. It should be noted that, as a conventional design familiar to those skilled in the art, in order to make the pull claw 8 more smoothly leave the side hole 10, the top of the side hole 10 can also be designed as an arc surface, which makes it easier to push out the upward-moving pull claw 8. This is a conventional design and will not be described in detail here.

[0021] Meanwhile, in order to ensure the stability of the pull claw 8 when gripping the locking pin 14, as a conventional quantity design, the side hole 10, the rotating arc plate 16 and the pull claw 8 are preferably arranged symmetrically in twos, and the two rotating arc plates 16 rotate coaxially through the fixed shaft 11.

[0022] Furthermore, in practical applications, when the wheel hub is placed on the wheel hub mounting plate 13, dust, mud, and other impurities adhering to the wheel hub or tire may fall into the locking pin hole 9. To prevent these impurities from entering the housing 1 through the side hole 10, the outside of the side hole 10 should be sealed when the pull claw 8 is located above the side hole 10. Specifically, such as... Figure 3 , Figure 4 As shown, a dustproof protrusion 17 corresponding to the side hole 10 is fixedly provided on the lifting threaded sleeve 7. When the pull claw 8 rises away from the side hole 10, the dustproof protrusion 17 can cover the side hole 10. As a conventional structural replacement familiar to those skilled in the art, the upper dimension of the overall lifting threaded sleeve 7 can also be extended, and the length relationship between the pull claw 8, the side hole 10, and the upper end of the main shaft 2 can be controlled to ensure that when the pull claw 8 rises away from the side hole 10, the side wall of the lifting threaded sleeve 7 can block the side hole 10, isolate the locking pin insertion hole 9 from the inside of the outer casing 1, and prevent dust from entering the inside of the outer casing 1.

[0023] Furthermore, it should be noted that, as a conventional rotary connection design familiar to those skilled in the art, the rotary threaded sleeve 6 and the main shaft 2 can be rotaryly connected via bearings. In this application, the two are preferably rotaryly connected via a tapered bearing 15. Figure 2 as well as Figure 5As shown, an inner convex ring 26 is fixedly installed on the lower inner side of the rotating threaded sleeve 6 and sleeved on the outer side of the spindle 2. Tapered bearings 15 are sleeved on the spindle 2 on both the upper and lower sides of the inner convex ring 26. The spindle 2 is provided with bearing retainers 27 located on the upper and lower sides of the two tapered bearings 15, and locking nuts 25. During assembly, the upper tapered bearing 15, the rotating threaded sleeve 6, the lower tapered bearing 15, and the locking nut 25 are sequentially fitted onto the spindle 2, and the locking nut 25 is tightened to assemble the rotating threaded sleeve 6 onto the spindle 2. It should be noted that, as is common knowledge, the outer wall of the spindle 2 has external threads corresponding to the locking nut 25. As a conventional design familiar to those skilled in the art, the inner and outer rings of the tapered bearing 15 contact the inner walls of the spindle 2 and the rotating threaded sleeve 6, respectively, while the inner convex ring 26 should have a certain gap with the spindle 2 to avoid friction; this will not be elaborated further. It should be noted that the above-mentioned rotary connection structure is merely a conventional design familiar to those skilled in the art. Those skilled in the art may also use other conventional connection structures to replace the above structure, and this application will not elaborate further on the limitations.

[0024] It should be noted that in practical applications, this electric wheel hub locking device needs to be mounted on a tire changer. The outer casing 1 is fixed to the workbench of the changer, which contains a drive unit (such as a geared motor) that rotates the main shaft 2. During operation, the wheel hub is placed on the wheel hub placement plate 13, and the locking pin 14 is inserted. The hollow motor 13 is then activated, driving the rotating threaded sleeve 6 via the planetary gear set 4. This causes the lifting threaded sleeve 7 to descend. When the pull claw 8 descends to one side of the side hole 10, under the action of the torsion spring, the pull claw 8 passes through the side hole 10 and inserts into the locking groove 23 at the bottom of the locking pin 14. The lifting threaded sleeve 7 descends a certain distance, causing the pull claw 8 to tighten the locking groove 23, thus locking the locking pin 14 and securing the wheel hub. Subsequently, the geared motor on the workbench drives the main shaft 2 to rotate, which in turn rotates the wheel hub. Combined with the tire changer, this allows for tire replacement.

[0025] It should be noted that when the main shaft 2 rotates, with the cooperation of the guide pin 12 and the guide pin 18, the main shaft 2 will drive the lifting threaded sleeve 7, the pull claw 8, the rotating threaded sleeve 6, and the rotating connecting sleeve 5 to rotate together through the guide pin 12. When the rotating connecting sleeve 5 rotates, it will drive the rotor inside the hollow motor 3 to rotate through the planetary gear set 4, while the stator and motor body inside the hollow motor 3 remain stationary. This should be common knowledge familiar to those skilled in the art, and this application will not elaborate further.

[0026] It should be noted that the above embodiments are only specific and clear descriptions of the technical solutions and features of this application. Solutions or features that are prior art or common knowledge to those skilled in the art will not be described in detail in the above embodiments.

[0027] Furthermore, the technical solutions of this application are not limited to the above embodiments. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A wheel hub electric locking device for a tire changer, comprising a housing (1), a main shaft (2), and a locking pin (14), wherein the main shaft (2) passes through the housing (1) and is rotatably connected to the housing (1), a locking pin insertion hole (9) is provided at the upper end of the main shaft (2), a wheel hub placement plate (13) is fixedly provided at the upper end of the main shaft (2), a locking groove (23) is provided at the lower end of the locking pin (14), and the lower end of the locking pin (14) passes through the wheel hub placement plate (13) and is inserted into the locking pin insertion hole (9), characterized in that, It also includes a lifting threaded sleeve (7) sleeved on the main shaft (2) and slidably connected to the main shaft (2) up and down. A rotating threaded sleeve (6) sleeved on the outside of the lifting threaded sleeve (7) is rotatably provided on the main shaft (2). The rotating threaded sleeve (6) is threadedly connected to the lifting threaded sleeve (7). A drive motor assembly for driving the rotating threaded sleeve (6) to rotate is provided inside the outer shell (1). A claw assembly is provided at the upper end of the lifting threaded sleeve (7). A side hole (10) communicating with the locking pin insertion hole (9) is opened on the side wall of the main shaft (2). When the lifting threaded sleeve (7) descends, the claw assembly can lock and limit the locking groove (23) through the side hole (10). When the lifting threaded sleeve (7) rises, the claw assembly can release the limitation on the locking groove (23).

2. The electric wheel hub locking device for a tire changer according to claim 1, characterized in that, The drive motor assembly includes a hollow motor (3) fixedly installed inside the housing (1), a main shaft (2) passing through the hollow motor (3) and rotatably connected to the hollow motor (3), and a rotating connecting sleeve (5) sleeved on the outside of the main shaft (2) fixedly connected to the lower end of the rotating threaded sleeve (6). The hollow motor (3) drives the rotating connecting sleeve (5) to rotate through the planetary gear set (4).

3. The electric wheel hub locking device for a tire changer according to claim 2, characterized in that, The planetary gear set (4) includes a sun gear (20) fixedly sleeved on the output end of the hollow motor (3). Multiple planet gears (21) that mesh with the sun gear (20) are evenly arranged on the outer side of the sun gear (20). The planet gears (21) are rotatably mounted on the upper end of the hollow motor (3). An outer gear ring (22) that meshes with the planet gears (21) is fixedly mounted on the lower end of the inner side of the rotating connecting sleeve (5).

4. The electric wheel hub locking device for a tire changer according to claim 1, characterized in that, The pull claw assembly includes a rotating arc plate (16) rotatably disposed on the outside of the lifting threaded sleeve (7). A pull claw (8) corresponding to the side hole (10) is fixedly connected to the rotating arc plate (16). A fixed shaft (11) rotatably connected to the rotating arc plate (16) is fixedly disposed on the lifting threaded sleeve (7). A torsion spring connected to the rotating arc plate (16) is disposed on the fixed shaft (11) for moving the pull claw (8) toward the side closer to the main shaft (2). The upper end of the pull claw (8) can pass through the side hole (10) and be inserted into the locking groove (23). The top of the pull claw (8) is provided with an inclined surface (19) corresponding to the top of the side hole (10). When the pull claw (8) is pulled... When the claw (8) moves upward, the top of the side hole (10) can push the claw (8) out of the side hole (10) through the inclined surface (19).

5. The electric wheel hub locking device for a tire changer according to claim 4, characterized in that, The side hole (10), rotating arc plate (16) and pull claw (8) are symmetrically arranged in twos, and the two rotating arc plates (16) rotate coaxially through the fixed shaft (11).

6. The electric wheel hub locking device for a tire changer according to claim 1, characterized in that, The outer wall of the lifting threaded sleeve (7) is provided with a corresponding guide port (18), and a guide pin (12) is fixedly provided on the outer wall of the main shaft (2). The guide pin (12) is inserted into the guide port (18) and slidably connected to the guide port (18).

7. The electric wheel hub locking device for a tire changer according to claim 1, characterized in that, The inner lower end of the rotating threaded sleeve (6) is fixedly provided with an inner convex ring (26) sleeved on the outside of the main shaft (2). Tapered bearings (15) sleeved on the main shaft (2) are provided on both the upper and lower sides of the inner convex ring (26). Bearing holders (27) and locking nuts (25) are respectively located on the upper and lower sides of the two tapered bearings (15).

8. The electric wheel hub locking device for a tire changer according to claim 1, characterized in that, The outer shell (1) is rotatably connected to the main shaft (2) at both the upper and lower ends via bearings (24).

9. The electric wheel hub locking device for a tire changer according to claim 1, characterized in that, The lifting threaded sleeve (7) is fixedly provided with a dustproof protrusion plate (17) corresponding to the side hole (10). When the pull claw (8) is lifted away from the side hole (10), the dustproof protrusion plate (17) can cover the side hole (10).

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