Linkage type tire loosening device

Abstract

The utility model relates to the technical field of automobile maintenance, in particular to a linkage type tire loosening device. Comprising a positioning mechanism and a separating mechanism, the positioning mechanism comprises a positioning turntable, and the wheel is concentrically and fixedly connected with the positioning turntable; the positioning wheel disc is in sliding connection with the positioning sliding rail and gets close to or away from the separating mechanism in the horizontal direction; the separating mechanism comprises a supporting arm which is fixedly connected with the positioning sliding rail; the lever arm is hinged to the supporting arm, and the hinged position is higher than the wheels; the tire loosening plate is fixedly arranged on the lever arm, and the lever arm is pressed downwards so that the tire loosening plate can extrude a tire of the wheel. A linkage system is arranged between the lever arm and the positioning turntable, and the reset lever arm and the positioning turntable rotate by a certain angle; according to the linkage type tire loosening device, the cost of a hydraulic system and an electric control system is saved for a mechanical structure, and the linkage type tire loosening device is suitable for a low-cost small automobile maintenance factory. And through the linkage system provided by the invention, an operator does not need to independently rotate the tire when the tire is loosened.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair technology, and in particular to a linkage tire loosening device. Background Technology

[0002] The connection between car tires and rims is very tight. When repairing wheels, it is necessary to loosen the tires and rims first. Existing tire loosening equipment is mostly hydraulically driven, which is expensive and many small, individual repair shops are unwilling to buy it.

[0003] Furthermore, existing tire releasers lack a proper positioning mechanism, requiring manual support of the tire while using the other hand to control the position of the release plate. This means that even slight mishaps during the release process can cause the release plate to collide with the rim, resulting in paint damage. Additionally, it is difficult for personnel to apply force when controlling the release plate and tire, necessitating the use of a hydraulic system to drive the tire releaser. Utility Model Content

[0004] To solve the above-mentioned problems in the prior art, this utility model provides a linkage tire loosening device, including: a positioning mechanism and a separation mechanism;

[0005] The positioning mechanism includes: a positioning turntable, and a wheel fixedly connected concentrically to the positioning turntable;

[0006] The positioning slide rail is slidably connected to the positioning wheel, and moves closer to or further away from the separation mechanism in the horizontal direction;

[0007] The separation mechanism includes a support arm, which is fixedly connected to the positioning slide rail;

[0008] A lever arm, which is hinged to the support arm, with the hinge position higher than the wheel;

[0009] A tire-loosening plate is fixedly mounted on the lever arm. Pressing down the lever arm causes the tire-loosening plate to squeeze the tire of the wheel.

[0010] A linkage system is provided between the lever arm and the positioning turntable to reset the lever arm and rotate the positioning turntable by a certain angle;

[0011] The linkage system includes an energy storage component, which has a built-in spring. When the energy storage component rotates relative to the positioning turntable, the spring is compressed.

[0012] The transmission mechanism, following the movement of the lever arm, drives the energy storage component to rotate;

[0013] The locking mechanism moves before the transmission mechanism and with the lever arm to fix the positioning turntable.

[0014] Furthermore, the outer shell of the energy storage component is a ratchet structure, which is rotatably connected to the positioning turntable on the same axis, and the two ends of the spring are respectively fixedly connected to the outer shell of the energy storage component and the positioning turntable;

[0015] The transmission mechanism includes a drive groove fixedly disposed on the positioning turntable;

[0016] A driving slider, wherein one layer of the driving slider is a driving layer and the other layer is a locking layer, the driving layer and the locking layer are slidably connected to each other, and a first elastic element is provided.

[0017] The first rope has its two ends connected to the drive slider and the lever arm, respectively.

[0018] A reversing pulley system is used to change the direction of action of the first rope;

[0019] The drive layer is provided with ratchet teeth, which cooperate with the ratchet structure;

[0020] The locking layer is provided with locking teeth A, and the driving slide groove is provided with locking teeth B. When the driving layer drives the energy storage component to rotate, locking teeth B engage with locking teeth A to fix the driving slider; when locking teeth B are released, the driving slider resets.

[0021] Furthermore, the locking mechanism includes a locking pin, a locking hinge, and a second rope;

[0022] The locking hinge is fixedly connected to the positioning slide rail; the middle section of the locking pin is hinged to the locking hinge;

[0023] One end of the first rope is connected to the end of the locking pin, and the other end is connected to the lever arm;

[0024] The positioning turntable has locking grooves on its edge, and there are n locking grooves arranged in a circular array around the axis of the positioning turntable; n=360 / a, where a is the angle of rotation of the positioning turntable by the linkage system in a single drive.

[0025] The locking hinge part is provided with a hinge limiting part, and when the locking pin rod abuts against the hinge limiting part, the locking pin rod is in a vertical state;

[0026] The locking pin is located directly below the locking groove so that the vertical locking pin can enter the locking groove.

[0027] Furthermore, a second elastic element is provided between the driving slider and the driving groove to maintain the initial position of the driving slider;

[0028] The locking tooth B is connected to the lever arm via a third rope;

[0029] When the lever arm is in the initial position, the third rope pulls the locking tooth B away from the locking tooth A;

[0030] A third elastic element is provided between the locking tooth B and the driving slide groove, the third elastic element causing the locking tooth B to move closer to the locking tooth A.

[0031] Furthermore, a feedback limiting part is provided inside the drive slide groove;

[0032] Wherein, after the drive slider reaches the position where the locking tooth A and the locking tooth B are engaged, the feedback limiting part prevents the drive slider from moving.

[0033] Furthermore, the reversing pulley group includes at least pulley A, pulley B, and pulley C arranged sequentially in the height direction;

[0034] The pulley A is fixedly mounted on the support arm so that the first rope, the second rope, and the third rope are oriented toward the positioning turntable;

[0035] The pulley B is fixedly mounted on the positioning turntable so that the first rope, the second rope, and the third rope face the support arm;

[0036] The pulley C is fixedly mounted on the support arm so that the first rope, the second rope, and the third rope are oriented toward the positioning turntable;

[0037] Wherein, the pulley B moves with the positioning turntable;

[0038] Among them, the horizontal distance from pulley B to the positioning turntable is greater than that from pulley A and pulley C.

[0039] Furthermore, the connection point between the first rope and the lever arm is the first connection point; the connection point between the second rope and the lever arm is the second connection point.

[0040] The axis on which the lever arm and the support arm are hinged is axis M, and the distance from the first connection point to axis M is less than the distance from the second connection point to axis M.

[0041] An elastic connection is provided between the second rope and the locking pin.

[0042] Furthermore, a positioning shaft is provided at the axis position of the positioning turntable, and the distance between the top of the positioning shaft and the ground is less than 30cm;

[0043] A threaded hole is provided at the axial position of the positioning shaft;

[0044] It also includes a locking rod, one end of which is screwed into the threaded hole, and the other end is provided with a conical abutment part;

[0045] The conical abutment part abuts against the center hole of the hub.

[0046] Furthermore, the locking rod is provided with multiple positioning holes;

[0047] The conical abutment part is provided with a positioning pin, and the conical abutment part is slidably connected to the locking rod;

[0048] The positioning pin is inserted into the positioning hole to lock the position of the conical abutment part and the locking rod.

[0049] Furthermore, a support plate is connected above the positioning turntable to support the tire.

[0050] The beneficial effects of this utility model are reflected in the fact that the linkage-type tire loosener of this application eliminates the cost of hydraulic and electronic control systems for mechanical structures, making it suitable for low-cost small car repair shops. Furthermore, through the linkage system of this application, operators do not need to rotate the tire separately when loosening it, thus eliminating the need to repeatedly position the tire loosening plate relative to the tire, preventing the tire loosening plate from scratching the wheel rim. Attached Figure Description

[0051] Figure 1 A three-dimensional structural diagram of a linkage tire loosening device provided by this utility model;

[0052] Figure 2 A three-dimensional structural diagram of a linkage tire loosener with a wheel installed, provided by this utility model.

[0053] Figure 3 for Figure 2 A three-dimensional structural diagram of a linked tire release device that conceals the tire;

[0054] Figure 4 A schematic cross-sectional view of the linkage tire loosening device provided by this utility model from a bottom view.

[0055] Figure 5 for Figure 4 Enlarged view of point a in the middle;

[0056] Figure 6 A schematic diagram of the locking mechanism provided by this utility model;

[0057] Figure 7 This is a front view structural diagram of a linkage tire loosening device provided by this utility model.

[0058] Reference numerals: 1. Positioning mechanism; 11. Positioning turntable; 111. Locking groove; 112. Support plate; 12. Positioning slide rail; 2. Separation mechanism; 21. Support arm; 22. Lever arm; 23. Loosening plate; 3. Energy storage component; 31. Outer shell; 32. Spring; 4. Transmission mechanism; 41. Drive slide groove; 411. Locking tooth B; 4111. Third rope; 4112. Third elastic element; 412. Feedback limiting component; 42. Drive slider; 421. Drive layer; 4211. Ratchet; 422. 4221, Locking tooth A; 423, First elastic element; 43, First rope; 44, Second elastic element; 5, Locking mechanism; 51, Locking pin; 52, Locking hinge; 521, Hinge limiting part; 53, Second rope; 6, Reversing pulley block; 61, Pulley A; 62, Pulley B; 63, Pulley C; 7, Positioning shaft; 71, Threaded hole; 8, Locking rod; 81, Conical abutment part; 82, Positioning hole; 83, Positioning pin; 9, Wheel; 91, Center hole; 10, Fourth elastic element. Detailed Implementation

[0059] 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.

[0060] Example 1

[0061] Reference Figure 1 - Figure 7 .

[0062] A linkage tire loosening device includes: a positioning mechanism 1 and a separation mechanism 2;

[0063] The positioning mechanism 1 includes: a positioning turntable 11, and a wheel 9 fixedly connected concentrically to the positioning turntable 11;

[0064] The positioning slide rail 12 is fixedly connected to the separation mechanism 2; the positioning wheel is slidably connected to the positioning slide rail 12, and moves closer to or further away from the separation mechanism 2 in the horizontal direction;

[0065] The separation mechanism 2 includes a support arm 21, which is fixedly connected to the positioning slide rail 12.

[0066] Lever arm 22, which is hinged to support arm 21, with the hinge position higher than the wheel 9, and the lever arm 22 is pressed down to cause the tire loosening plate 23 to squeeze the tire of the wheel 9;

[0067] Tire loosening plate 23, which is fixedly mounted on the lever arm 22;

[0068] A linkage system is provided between the lever arm 22 and the positioning turntable 11 to reset the lever arm 22 and the positioning turntable 11 to rotate a certain angle;

[0069] The linkage system includes an energy storage component 3, which has a built-in spring 32. When the energy storage component 3 rotates relative to the positioning turntable 11, the spring 32 is compressed.

[0070] The transmission mechanism 4, along with the lever arm 22, drives the energy storage component 3 to rotate;

[0071] The locking mechanism 5 moves before the transmission mechanism 4 and with the lever arm 22 to fix the positioning turntable 11.

[0072] Existing tire loosening equipment lacks proper positioning capabilities, requiring operators to hold the wheel 9 with one hand and the tire loosening plate 23 with the other. The wheel 9 is relatively large, making it difficult to fully control the tire with one hand. Furthermore, the tire loosening plate 23 is installed very close to the rim, making it prone to bumping against the rim, resulting in scratches and paint damage. Additionally, the tire needs to be rotated multiple times during loosening to fully loosen its circumference, requiring repositioning during this process. While many tire loosening devices have rubber protective covers for the tire loosening plate 23, these covers tend to slip off when lifted, often pressing against the rim. Therefore, operators often fail to use the protective covers correctly.

[0073] The system requires a person to hold the wheel 9 with one hand and the tire release plate 23 with the other. Since the wheel 9 is typically about 60cm in diameter, the person needs to bend over to support it. This makes it impossible for the person to apply significant force to the tire release plate 23, necessitating the use of a hydraulic system. After the tire release plate 23 is aligned with the tire, the hydraulic system is activated to compress the tire. Clearly, with the person in this position, the hydraulic system must also be equipped with a corresponding electronic control system. This results in a high cost for hydraulic tire release equipment, making it unsuitable for small repair shops or individual users.

[0074] There are also tire loosening devices with purely mechanical structures in the existing technology. These devices are often very simple in structure, still do not have a positioning function, and reposition themselves every time the wheel is rotated.

[0075] In this application, a linkage-type tire loosening device is provided, including a separation mechanism 2. The separation mechanism 2 is similar to the tire loosening devices in the prior art, having a support arm 21. A lever arm 22 is hinged to the top of the support arm 21. The slight difference is that the tire loosening plate 23 is fixedly connected to the lever arm 22. In the prior art, the tire loosening plate 23 is usually hinged to the lever arm 22. This is because the tire loosening equipment in the prior art requires the degree of freedom of the tire loosening plate 23 to position wheels 9 of different diameters. However, the tire loosening device of this application achieves the positioning of the tire loosening plate 23 and the tire through the positioning mechanism 1.

[0076] This application also includes a positioning mechanism 1, which includes a positioning turntable 11. A wheel 9 is installed in the positioning turntable 11. The wheel 9 is coaxial with the positioning turntable 11. The wheel 9 and the positioning turntable 11 rotate and move synchronously. A support plate 112 is connected above the positioning turntable 11. The wheel 9 is placed flat on the support plate 112.

[0077] The positioning mechanism 1 also includes a positioning slide rail 12. The positioning turntable 11 slides along the positioning slide rail 12. When removing a tire with a slightly larger diameter, the positioning turntable 11 moves away from the tire release plate 23; when removing a tire with a slightly smaller diameter, the positioning turntable 11 moves closer to the tire release plate 23. There are not many common tire sizes, and the positioning slide rail 12 can be set with positioning pins 83 at several commonly used points. The positioning of the tire release plate 23 and the tire can be completed simply by pressing the positioning turntable 11 against the positioning pins 83, without the need for precise positioning.

[0078] The linkage tire loosening device of this application also includes a linkage system. Through the linkage system, the tire can be automatically rotated after the tire loosening plate 23 loosens the tire by one angle each time. The personnel can complete the tire loosening task by simply pressing down and raising the lever arm 22.

[0079] Specifically, the linkage system includes an energy storage component 3, which has a built-in spring 32. The spring 32 drives the positioning turntable 11 to rotate. The positioning turntable 11 is equipped with a bearing. During rotation, rolling friction occurs, and the spring 32 does not require a large force to drive the positioning turntable 11 to rotate.

[0080] It also includes a transmission mechanism 4 and a locking mechanism 5. When the lever arm 22 is pressed down, the locking mechanism 5 is triggered first to fix the positioning turntable 11 and prevent the positioning turntable 11 from rotating prematurely when the tire release plate 23 contacts the tire. As the lever arm 22 presses down and the locking mechanism fixes the positioning turntable 11, the lever arm 22 continues to press down and the transmission mechanism 4 is activated, driving the energy storage component 3 to rotate. After the energy storage component 3 is rotated, the spring 32 is compressed, the tire release plate 23 loosens the tire, the lever arm 22 is fully lifted so that the tire release plate 23 is completely separated from the tire, the locking mechanism 5 is released, and the positioning turntable 11 rotates.

[0081] More specifically, the outer shell 31 of the energy storage component 3 is configured as a ratchet structure. A ratchet is a commonly used unidirectional mechanical mechanism that, when rotating in one direction, does not obstruct the reset of the drive component (pawl). The transmission mechanism 4 specifically includes a drive groove 41 fixedly mounted on the positioning turntable 11, a drive slider disposed within the drive groove 41, and a first rope 43 connected at both ends to a lever arm 22 and the drive slider, respectively. When the lever arm 22 moves, it pulls the first rope 43, causing the drive slider to slide along the drive groove 41. The ratchet teeth 4211 of the drive slider cause the outer shell 31 of the energy storage component 3 to rotate, thereby compressing the spring 32. Understandably, due to the positional relationship between the lever arm 22 and the drive slider, the first rope 43 cannot be directly connected to both in a straight line; therefore, a reversing pulley group 6 is provided to adjust the position of the first rope 43.

[0082] Furthermore, the direction of the drive slide 41 is not necessarily a straight line. The guide trajectory of the drive slide 41 can be set as an arc concentric with the positioning turntable 11. The angle of the arc determines the angle of each movement of the energy storage component 3, thereby determining the angle of each rotation of the positioning turntable 11.

[0083] Before releasing the locking mechanism 5, the outer shell 31 of the energy storage component 3 must be kept stationary so that the spring 32 can drive the positioning turntable 11 to rotate. Therefore, the drive component is configured with a two-layer structure. The side facing the energy storage component 3 is the drive layer 42; drive slider 421, drive layer 42; drive slider 421 is provided with a pawl. The opposite side is the locking layer 422, and the locking layer 422 is provided with locking teeth A4221. Locking teeth B411 are provided in the drive groove 41. Before the tire plate 23 is completely separated from the tire, locking teeth B411 and locking teeth A4221 engage to ensure that the drive component is fixed. The ratchet 4211 of the drive component engages with the outer shell 31 of the energy storage component 3 to ensure that the outer shell 31 of the energy storage component 3 is fixed. Specifically, the locking layer 422 and the driving layer 42 are slidably connected, and a first elastic element 423 is provided between them. The locking teeth A4221 and B411 are set in a general snap-fit ​​form. The locking teeth A4221 and B411 abut against each other through the inclined surface, compressing the first elastic element 423, so that the locking layer 422 moves away from the locking teeth B411 and then passes over the locking teeth B411, and the locking teeth A4221 and B411 complete the engagement.

[0084] Furthermore, the drive slider needs to be reset in order to actuate the energy storage component 3 again. Specifically, a second elastic element 44 is provided between the drive slider and the drive groove 41. The second elastic element 44 can be set as a spring, which can pull the drive slider back to its original position along the drive groove 41 or push it back to its original position. For the second elastic element 44 to move the drive slider, it obviously needs to release the obstruction of the locking tooth B411. Specifically, the locking tooth B411 can also be linked with the lever arm 22, or directly controlled by an electromagnet.

[0085] Furthermore, this embodiment provides a specific structure for the linkage between the lever arm 22 and the locking tooth B411.

[0086] Locking tooth B411 is connected to lever arm 22 via a third rope 4111, and a third elastic element 4112 is provided between locking tooth B411 and drive slide 41. The third elastic element 4112 drives locking tooth B411 to move closer to locking tooth A4221. That is, when locking tooth B411 is subjected to a force other than the elastic force of the third elastic element 4112, locking tooth B411 can engage with locking tooth A4221. The third rope 4111 causes locking tooth B411 to move away from locking tooth A4221 when lever arm 22 is in the initial position. In other words, the third rope 4111 has the opposite effect to the first rope 43 and the second rope 53. When lever arm 22 is pressed down, the third rope 4111 enters a slack state and no longer provides tension to locking tooth B411. Locking tooth B411 moves closer to locking tooth A4221 through the elastic force of the third elastic element 4112. During the process of raising the lever arm 22 (resetting the lever arm 22), the locking mechanism 5 first unlocks the positioning turntable 11, then the positioning turntable 11 rotates, and then pushes the lever arm 22 to the highest position. Furthermore, in order to better control the unlocking sequence of the locking mechanism 5 and the locking tooth B411, a fourth elastic element 10 can be set in the movement path of the lever arm 22, so that when the lever arm 22 is naturally lowered, the lever arm 22 and the fourth elastic element 10 abut against each other. At this time, the movement stroke of the lever arm 22 is just insufficient to separate the locking tooth B411 from the locking tooth A4221. When the operator actively pushes the lever arm 22 upward to squeeze the fourth elastic element 10, the movement stroke is increased, thereby completely separating the locking tooth B411 from the locking tooth A4221, and the second elastic element 44 drives the drive slider to reset.

[0087] The locking mechanism 5 includes a locking pin 51, a locking hinge part 52, and a second rope 53; the locking hinge part 52 is fixedly connected to the positioning slide rail 12; the middle section of the locking pin 51 is hinged to the locking hinge part 52; one end of the first rope 43 is connected to the end of the locking pin 51, and the other end is connected to the lever arm 22.

[0088] The positioning turntable 11 has a locking groove 111 on its edge, and there are n locking grooves arranged in a circular array around the axis of the positioning turntable 11; n=360 / a, where a is the angle by which the linkage system drives the positioning turntable 11 to rotate in a single drive.

[0089] The locking hinge part 52 is provided with a hinge limiting part 521. When the locking pin 51 abuts against the hinge limiting part 521, the locking pin 51 is in a vertical state.

[0090] The locking pin 51 is located directly below the locking groove 111 so that the vertical locking pin 51 can enter the locking groove 111.

[0091] Furthermore, the connection point between the first rope 43 and the lever arm 22 is the first connection point; the connection point between the second rope 53 and the lever arm 22 is the second connection point.

[0092] The axis of hinge between the lever arm 22 and the support arm 21 is axis M, and the distance from the first connection point to axis M is less than the distance from the second connection point to axis M.

[0093] The second rope 53 is elastically connected to the locking pin 51.

[0094] The second connection point is farther from the axis M than the first connection point, which means that when the lever arm 22 rotates, the object dragged by the second rope 53 moves faster. Therefore, the locking pin 51 can enter the vertical state to fix the positioning turntable 11 before the positioning turntable 11 rotates. After the locking pin 51 enters the vertical state, the locking pin 51 abuts against the hinge limit part 521. In order to ensure that the lever arm 22 can continue to move, the locking pin 51 is elastically connected to the second rope 53. Specifically, a tension spring can be added between the two, or the second rope 53 can be directly set as an elastic rope. The force required to move the locking pin 51 is very small, and there is no need to consider the connection rigidity between the second rope 53 and the locking pin 51.

[0095] Example 2

[0096] Reference Figure 4 .

[0097] A feedback limiting part is provided inside the drive slide 41;

[0098] Wherein, after the drive slider reaches the position where the locking tooth A4221 engages with the locking tooth B411, the feedback limiting part prevents the drive slider from moving.

[0099] When different personnel control the tire loosening plate 23 to loosen the tire, the pressing stroke will inevitably differ. If the drive slider continuously moves the energy storage component 3 with the pressing of the lever arm 22, the rotation angle of the positioning turntable 11 will be uncontrollable. However, with the feedback limit component 412, each time the operator presses the lever arm 22 until the feedback limit part abuts against the drive slider, it means that a standard tire loosening action has been completed. The feedback limit component 412 acts as a feedback response to whether the pressing is in place, promptly reminding the operator to stop pressing the lever arm 22. Conversely, if the lever arm 22 can still be pressed, it means that the drive slider can continue to move the energy storage component 3. In this case, stopping the pressing of the lever arm 22 will prevent the positioning turntable 11 from rotating to a standard angle, and the locking mechanism 5 will not lock in time.

[0100] Example 3

[0101] Reference Figure 1 .

[0102] The reversing pulley group 6 includes at least pulleys A61, B62 and C63 arranged sequentially in the height direction;

[0103] The pulley A61 is fixedly mounted on the support arm 21 so that the first rope 43, the second rope 53, and the third rope 4111 face the positioning turntable 11;

[0104] The pulley B62 is fixedly mounted on the positioning turntable 11 so that the first rope 43, the second rope 53, and the third rope 4111 face the support arm 21;

[0105] The pulley C63 is fixedly mounted on the support arm 21 so that the first rope 43, the second rope 53, and the third rope 4111 face the positioning turntable 11;

[0106] The pulley B62 moves with the positioning turntable 11;

[0107] Among them, the pulley B62 is farther from the positioning turntable 11 than the pulleys A61 and C63.

[0108] When adapting to tires of different diameters, the positioning turntable 11 needs to be closer to or further away from the support arm 21. Since the rope length is fixed, the rope becomes slack when the positioning turntable 11 approaches or moves closer to the support arm 21. Therefore, the reversing pulley assembly 6 needs to include at least pulleys A61, B62, and C63 arranged sequentially in the vertical direction. Pulleys A61 and C63 are fixed to the support arm 21, while pulley B62 is fixed to the positioning turntable 11. As the positioning turntable 11 moves, pulley B62 is further horizontally from the positioning turntable 11 than pulleys A61 and C63. In other words, with the support arm 21 as the boundary, the pulley B62 is located on the left side of the support arm 21, and the positioning turntable 11 is located on the right side of the support arm 21. When the positioning turntable 11 approaches the support arm 21, the pulley B62 moves away from the support arm 21. Thus, the pulley B62 can always ensure that the tension of the first rope 43, the second rope 53, and the third rope 4111 is not affected by the movement of the positioning turntable 11.

[0109] Example 4

[0110] Reference Figure 1 and Figure 3 .

[0111] The positioning turntable 11 has a positioning shaft 7 at its axial position, and the top of the positioning shaft 7 is less than 30cm from the ground.

[0112] A threaded hole 71 is provided at the axial position of the positioning shaft 7;

[0113] It also includes a locking rod 8, one end of which is screwed into the threaded hole 71, and the other end is provided with a conical abutment part 81.

[0114] The conical abutment portion 81 abuts against the center hole 91 of the hub.

[0115] The tire releaser of this application is a horizontal tire releaser, which requires the wheel 9 to be placed horizontally. The wheel 9 needs to rotate synchronously with the positioning turntable 11, so the positioning turntable 11 needs to be coaxial with the tire. When the tire and wheel 9 are placed coaxially through the positioning shaft 7, the positioning shaft 7 needs to pass through the center hole 91 of the wheel 9. To complete this action, the center hole 91 of the wheel 9 needs to be higher than the top of the positioning shaft 7. If the positioning shaft 7 is too high, it will be very difficult to lift the tire to complete the positioning. In this application, the distance from the top of the positioning shaft 7 to the ground is less than 30cm. This height is less than the radius of the common car wheel 9 tire, so the tire can be rolled vertically close to the positioning shaft 7. Then, during the process of the wheel 9 being laid down, the positioning shaft 7 is directly inserted into the center hole 91 of the wheel 9.

[0116] However, the positioning shaft 7 only protrudes from the top of the positioning turntable 11, so its actual length is much less than 30cm. This results in the wheel hub face of the wheel 9 being higher than the top of the positioning shaft 7, preventing the positioning shaft 7 from passing through the center hole 91. To address this, a locking rod 8 is provided in this embodiment to increase the height of the positioning shaft 7. A threaded hole 71 is provided at the axial position of the positioning shaft 7, and the locking rod 8 is provided with a conical abutment part 81. As the locking rod 8 is continuously screwed into the threaded hole 71, the conical abutment part 81 abuts against the center hole 91 of the tire, ensuring that the tire and the positioning turntable 11 are coaxial.

[0117] Furthermore, the locking rod 8 is provided with multiple positioning holes 82 along its own direction. The conical abutment part 81 is slidably connected to the locking rod 8. The locking rod 8 and the conical abutment part 81 are fixedly connected by a positioning pin 83 inserted into the positioning hole 82, so that the conical abutment part 81 can be set at different positions of the locking rod 8 to adapt to different tires and the change in the height of the center hole 91 of the same tire after it is flipped.

[0118] In the description of the embodiments of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0119] In the description of embodiments of this utility model, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0120] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0121] In the description of the embodiments of this utility model, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0122] In the description of the embodiments of this utility model, it should be understood that "-" and "~" represent two different ranges of values, and the range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0123] In the description of the embodiments of this utility model, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0124] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linkage-type tire loosening device, characterized in that, include: Positioning mechanism and separation mechanism; The positioning mechanism includes: a positioning turntable, and a wheel fixedly connected concentrically to the positioning turntable; The positioning slide rail is slidably connected to the positioning wheel, and moves closer to or further away from the separation mechanism in the horizontal direction; The separation mechanism includes a support arm, which is fixedly connected to the positioning slide rail; A lever arm, which is hinged to the support arm, with the hinge position higher than the wheel; A tire-loosening plate is fixedly mounted on the lever arm. Pressing down the lever arm causes the tire-loosening plate to squeeze the tire of the wheel. A linkage system is provided between the lever arm and the positioning turntable to reset the lever arm and rotate the positioning turntable by a certain angle; The linkage system includes an energy storage component, which has a built-in spring. When the energy storage component rotates relative to the positioning turntable, the spring is compressed. The transmission mechanism, following the movement of the lever arm, drives the energy storage component to rotate; The locking mechanism moves before the transmission mechanism and with the lever arm to fix the positioning turntable.

2. The linkage tire loosening device according to claim 1, characterized in that, The outer shell of the energy storage component is a ratchet structure, which is rotatably connected to the positioning turntable on the same axis. The two ends of the spring are respectively fixedly connected to the outer shell of the energy storage component and the positioning turntable. The transmission mechanism includes a drive groove fixedly disposed on the positioning turntable; A driving slider, wherein one layer of the driving slider is a driving layer and the other layer is a locking layer, the driving layer and the locking layer are slidably connected to each other, and a first elastic element is provided. The first rope has its two ends connected to the drive slider and the lever arm, respectively. A reversing pulley system is used to change the direction of action of the first rope; The drive layer is provided with ratchet teeth, which cooperate with the ratchet structure; The locking layer is provided with locking teeth A, and the driving slide groove is provided with locking teeth B. When the driving layer drives the energy storage component to rotate, locking teeth B engage with locking teeth A to fix the driving slider; when locking teeth B are released, the driving slider resets.

3. The linked tire loosening device according to claim 2, characterized in that, The locking mechanism includes a locking pin, a locking hinge, and a second rope; The locking hinge is fixedly connected to the positioning slide rail; the middle section of the locking pin is hinged to the locking hinge; One end of the first rope is connected to the end of the locking pin, and the other end is connected to the lever arm; The positioning turntable has locking grooves on its edge, and there are n locking grooves arranged in a circular array around the axis of the positioning turntable; n=360 / a, where a is the angle of rotation of the positioning turntable by the linkage system in a single drive. The locking hinge part is provided with a hinge limiting part, and when the locking pin rod abuts against the hinge limiting part, the locking pin rod is in a vertical state; The locking pin is located directly below the locking groove so that the vertical locking pin can enter the locking groove.

4. The linked tire loosening device according to claim 3, characterized in that, A second elastic element is provided between the driving slider and the driving groove to maintain the initial position of the driving slider; The locking tooth B is connected to the lever arm via a third rope; When the lever arm is in the initial position, the third rope pulls the locking tooth B away from the locking tooth A; A third elastic element is provided between the locking tooth B and the driving slide groove, the third elastic element causing the locking tooth B to move closer to the locking tooth A.

5. A linkage tire loosening device according to claim 4, characterized in that, A feedback limiting part is provided inside the drive slide groove; Wherein, after the drive slider reaches the position where the locking tooth A and the locking tooth B are engaged, the feedback limiting part prevents the drive slider from moving.

6. A linkage tire loosening device according to claim 5, characterized in that, The reversing pulley group includes at least pulley A, pulley B and pulley C arranged sequentially in the height direction; The pulley A is fixedly mounted on the support arm so that the first rope, the second rope, and the third rope are oriented toward the positioning turntable; The pulley B is fixedly mounted on the positioning turntable so that the first rope, the second rope, and the third rope face the support arm; The pulley C is fixedly mounted on the support arm so that the first rope, the second rope, and the third rope are oriented toward the positioning turntable; Wherein, the pulley B moves with the positioning turntable; Among them, the horizontal distance from pulley B to the positioning turntable is greater than that from pulley A and pulley C.

7. A linkage tire loosening device according to claim 6, characterized in that, The connection point between the first rope and the lever arm is the first connection point; the connection point between the second rope and the lever arm is the second connection point. The axis on which the lever arm and the support arm are hinged is axis M, and the distance from the first connection point to axis M is less than the distance from the second connection point to axis M. An elastic connection is provided between the second rope and the locking pin.

8. A linkage tire loosening device according to claim 7, characterized in that, The positioning turntable has a positioning shaft at its axial position, and the top of the positioning shaft is less than 30cm from the ground. A threaded hole is provided at the axial position of the positioning shaft; It also includes a locking rod, one end of which is screwed into the threaded hole, and the other end is provided with a conical abutment part; The conical abutment part abuts against the center hole of the hub.

9. A linkage tire loosening device according to claim 8, characterized in that, The locking rod is provided with multiple positioning holes; The conical abutment part is provided with a positioning pin, and the conical abutment part is slidably connected to the locking rod; The positioning pin is inserted into the positioning hole to lock the position of the conical abutment part and the locking rod.

10. A linkage tire loosening device according to claim 9, characterized in that, A support plate is connected above the positioning turntable to support the tire.

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