Tire clamp and tire replacement tool

Abstract

The utility model provides a tire clamp and a tire replacement tool. The tire clamp comprises a fixed frame, two movable frames, a connecting rod assembly and a driving part, a middle shaft H is arranged on the fixed frame, the fixed frame comprises a sliding frame and a connecting frame, the two ends of each movable frame are in sliding connection with the sliding frame, the two movable frames are symmetrically arranged, a containing space is defined by the two movable frames, and the connecting rod assembly is arranged in the containing space. Each movable frame is connected with the connecting frame through a connecting rod assembly, the connecting rod assemblies are also connected with a driving piece, the driving piece is arranged in the connecting frame, the driving piece acts to enable the connecting rod assemblies to push or pull the two movable frames to move towards each other or away from each other, and when the two movable frames move towards each other, the two movable frames move towards each other. And meanwhile, the roller is close to the middle shaft H. The clamping tightness can be simultaneously adjusted up and down, and the application range of the tire diameter is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of tire replacement, in particular to a tire clamp and a tire replacement tool. Background Art

[0002] Tire replacement is generally based on the center of the tire, which is aligned with the center of the axle on the chassis before installation. Currently, a two-claw clamping tool is generally used for tire removal and replacement. The two claws move in such a way that the lower claw is fixed, the tire is placed on the lower claw, and the upper claw moves downward to clamp the tire. This method of fixing one side and moving the other side can easily cause the center of the tire to not coincide with the center of the tool (the preset reference), and it is impossible to accurately define the reference on the tool for installing the tire, resulting in a large tire installation error. In addition, due to its mechanism principle requirements, the two-claw clamping tool can only be applied to a small range of tire diameters. Utility Model Content

[0003] The utility model aims to provide a tire clamp and a tire replacement tool, which can realize the function of adjusting the clamping tightness up and down at the same time and improve the installation accuracy.

[0004] The technical solution of the utility model is: a tire clamp, including a fixed frame, a movable frame, a connecting rod assembly and a driving member, the fixed frame is provided with a central axis H, the fixed frame includes two slides arranged opposite to each other in the Y direction and a connecting frame connected between the two slides, both ends of the movable frame are slidably connected to the slides, the movable frames are provided with two, the two movable frames are symmetrically arranged on both sides of the connecting frame along the Z direction, the two movable frames are enclosed to form a accommodating space, each of the movable frames is connected to the connecting frame through a connecting rod assembly, the connecting rod assembly is also connected to the driving member, the driving member is arranged in the connecting frame, the driving member is actuated to make the connecting rod assembly push or pull the two movable frames to move toward or away from each other, and when the two movable frames move toward each other, they simultaneously move closer to the central axis H.

[0005] In the above scheme, two movable frames are symmetrically arranged on both sides of the connecting frame in the Z direction, and the two movable frames are driven by the driving member to move toward or away from each other, so as to realize one degree of freedom adjustment. The upper and lower movable frames can adjust the clamping tightness, which can ensure the coaxiality of the center of the tire in the accommodating space and the central axis of the clamp, so as to better realize the positioning of the tire; it can also be applicable to a wide range of tire diameters.

[0006] Preferably, both ends of each movable frame are provided with connecting components, the connecting components at both ends of the same movable frame are symmetrical in the Y direction, and the two connecting rod components connected to the two movable frames are symmetrical in the Z direction.

[0007] Preferably, the connecting rod assembly includes a first rod and a second rod, a hinge A is set at one end of the first rod, and the hinge A is slidably set with the connecting frame, a hinge C is set at the other end of the first rod, a hinge D is provided on the first rod, one end of the second rod is hinged to the hinge D, and the other end of the second rod is provided with the hinge B, the hinge B is hinged to the connecting frame, and the hinge C is hinged to the movable frame.

[0008] Preferably, the length of the first rod is longer than the length of the second rod.

[0009] Preferably, the connecting frame is provided with a sliding hole extending along the Y direction, and the driving member includes a double-headed screw and two sliders threadedly connected to the double-headed screw, and the two ends of the slider extend out of the slider in the Z direction and are hinged to the hinge A.

[0010] Preferably, the driving member also includes an adjusting screw for driving the double-headed screw to rotate; both ends of the double-headed screw are rotatably arranged on the slide, and both ends of the double-headed screw extend out of the outside of the slide to form a first driving end; one end of the adjusting screw is connected to the middle part of the double-headed screw, and the other end of the adjusting screw extends out of the outside of the connecting frame to form a second driving end.

[0011] Preferably, bearings are provided at both ends of the movable frame, and the bearings are assembled in the slide frame in a manner of three rolling surface contacts.

[0012] Preferably, the movable frame includes a frame body and legs detachably connected to both ends of the frame body in the Y direction, the legs extend in the X direction, the legs on the two movable frames enclose the accommodating space, and the hinge point A is hinged to the frame body.

[0013] Preferably, the extended end of the holding leg is hinged with a movable pin, and the movable pin is V-shaped.

[0014] The utility model also provides a tire replacement tool, including a mobile trolley, a lifting platform arranged on the mobile trolley and the above-mentioned tire clamp, a slewing bearing is installed on the lifting platform, the inner ring of the slewing bearing is connected to the lifting platform, the outer ring of the slewing bearing is connected to the fixed frame of the tire clamp, and the center line of the slewing bearing coincides with the central axis H.

[0015] Compared with the related art, the beneficial effects of the utility model are:

[0016] First, the utility model symmetrically arranges two movable frames on both sides of the connecting frame in the Z direction, and drives the two movable frames to move toward or away from each other through a driving member, thereby realizing one degree of freedom adjustment, and the upper and lower movable frames have the function of adjusting the clamping tightness, which can ensure the coaxiality of the center of the tire in the accommodating space and the central axis of the clamp, and better realize the positioning of the tire;

[0017] Second, the double-headed screw of the driving member is provided with two first driving ends and one second driving end, which can be adjusted in three directions, thus improving operability and not being affected by the operating space;

[0018] 3. The hinge point A is hinged on the slider, and the slider is connected to the double-headed screw thread pair, which can realize the self-locking of the tire clamping;

[0019] Fourth, the holding legs are detachably connected to the frame body, and the holding legs are disassembled when not in use, thereby reducing the storage space of the tire clamp and realizing effective utilization of the storage space;

[0020] 5. Adding a V-shaped movable pin to the clamping leg can increase the friction between the clamping leg and the tire, making the clamping more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of the tire clamp and the slewing support provided by the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the front view structure of

[0023] Figure 3 The figure is a schematic diagram of the installation of the slide, bearing and movable frame;

[0024] Figure 4 The figure is a schematic diagram of the installation of the driving part;

[0025] Figure 5 A schematic diagram of a tire clamp provided by the utility model clamping a tire from a first perspective;

[0026] Figure 6 A schematic diagram of a second viewing angle of the tire clamp provided by the utility model clamping a tire;

[0027] Figure 7 A cross-sectional view of the tire clamp provided by the utility model clamping a tire;

[0028] Figure 8 The present invention is a schematic structural diagram of a tire replacement tool provided by the present invention.

[0029] In the attached drawings: 1. tire clamp; 11. fixed frame; 111. slide frame; 112. slide groove; 113. mounting plate; 114. connecting frame; 115. slide hole; 12. movable frame; 121. frame body; 122. leg holder; 123. movable pin; 13. connecting rod assembly; 131. first rod; 132. second rod; 14. driving member; 141. double-headed screw; 142. slider; 143. adjusting screw; 144. ratchet wrench; 15. bearing; 16. accommodation space; 2. mobile trolley; 3. lifting platform; 4. slewing bearing; 5. tire. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0031] like Figure 1 , Figure 2 As shown, the tire clamp 1 provided in this embodiment has a length direction X, a width direction Y and a height direction Z. The tire clamp 1 comprises a fixed frame 11 , a movable frame 12 , a connecting rod assembly 13 , a driving member 14 , a bearing 15 and a receiving space 16 .

[0032] The center of the fixed frame 11 is provided with a central axis H. The fixed frame 11 includes two slides 111 arranged at a relative interval in the Y direction. The slides 111 are provided with a C-shaped slide groove 112, and the slide grooves 112 on the two slides 111 are arranged face to face. The two slides 111 are connected by a mounting plate 113 and a connecting frame 114, and the connecting frame 114 is located on the X side of the mounting plate 113, and the central axis H passes through the center of the mounting plate 113 and the connecting frame 114. Two slide holes 115 are provided on the upper and lower sides of the connecting frame 114 in the Z direction, and the slide holes 115 extend in the Y direction. The two slide holes 115 in the Y direction do not penetrate each other.

[0033] The movable frame 12 includes a frame body 121 and legs 122 connected to both ends of the frame body 121 in the Y direction by threaded connection. The legs 122 are round tubes, one end of which is provided with an external thread, and the other end is internally hinged with a movable pin 123, such as Figure 7 As shown, the movable pin 123 is V-shaped, and the movable pin 123 can increase the friction force at the end of the leg holding 122. Figure 2 As shown, the four movable pins 123 are inclined toward the central axis H.

[0034] The connecting rod assembly 13 includes a first rod 131 and a second rod 132. A hinge point A is set at one end of the first rod 131, and a hinge point C is set at the other end of the first rod 131. A hinge point D is set on the first rod 131, one end of the second rod 132 is hinged to the hinge point D, and a hinge point B is set at the other end of the second rod 132. The length of the first rod 131 is longer than the length of the second rod 132.

[0035] like Figure 1 , Figure 2 As shown, both ends of the frame body 121 of the movable frame 12 are slidably connected to the slide 111, and two movable frames 12 are symmetrically arranged on both sides of the connecting frame 114 in the Z direction. The two movable frames 12 enclose a receiving space 16. Each of the movable frames 12 is connected to the connecting frame 114 through a connecting rod assembly 13. Each of the movable frames 12 is connected to the connecting frame 114 through two connecting rod assemblies 13 symmetrical in the Y direction, and the two connecting rod assemblies 13 connected to the two movable frames 12 are symmetrical in the Z direction.

[0036] like Figure 2 , Figure 4 As shown, the driving member 14 includes a double-headed screw 141, a slider 142 and an adjusting screw 143. The double-headed screw 141 is rotatably mounted in the connecting frame 114, and both ends of the double-headed screw 141 extend outward from the slider 111 to form a first driving end. A ratchet wrench 144 or an electric wrench or an electric cylinder drive can be installed on the first driving end to drive the double-headed screw 141 to rotate. The double-headed screw 141 is provided with positive and negative thread segments, and each thread segment is threadedly connected to a slider 142. Figure 1 As shown, the two ends of the slider 142 in the Z direction extend out of the outside of the slide hole 115 and are hinged to the hinge point A. The length of the slide hole 115 is the stroke length of the slider 142. The adjustment screw 143 is connected to the middle of the double-headed screw 141 by a transmission connection. One end of the adjustment screw 143 can be a bevel gear drive or a worm gear drive, and the other end of the adjustment screw 143 extends out of the outside of the connecting frame 114 to form a second drive end. The second drive end can be installed with a ratchet wrench 144 or an electric wrench or an electric cylinder drive.

[0037] like Figure 2 As shown, the hinge point B is hinged to the connecting frame 114, and the hinge point C is hinged to the frame body 121 of the movable frame 12. The double-headed screw 141 of the driving member 14 rotates to drive the hinge point A to slide along the connecting frame 114, so that when the hinge point A moves closer to or away from the hinge point B, the hinge point C is driven to push or pull the two movable frames 12 to move toward or away from each other, so that the leg holding 122 can hold the tire 5 (such as Figure 5 , Figure 6) or loosen the tire 5. The tire 5 is clamped in the accommodating space 16. Since the two movable frames 12 move simultaneously, it is possible to ensure that the center line of the tire 5 coincides with the center axis H and ensure coaxiality.

[0038] Under the action of the long first rod 131, the two sliders 142 in the Y direction slide symmetrically through the rotation of the double-headed screw 141, thereby driving the two movable frames 12 in the Z direction to move up or down. The short second rod 132 serves to increase the stability of the first rod 131.

[0039] Two first driving ends and one second driving end are provided, so that a suitable choice can be made when one side is inconvenient to use or in a narrow space on both sides.

[0040] like Figure 3 As shown, bearings 15 are provided at both ends of the movable frame 12. The bearings 15 are end face composite bearings, and the bearings 15 are assembled in the slide groove 112 of the slide frame 111 in a manner of three rolling surface contacts. The bearings 15 minimize the friction resistance with the three surfaces of the slide groove 112.

[0041] like Figure 8 As shown, the utility model also provides a tire replacement tool, including a mobile trolley 2, a lifting platform 3 arranged on the mobile trolley 2 and the above-mentioned tire clamp 1. The lifting platform 3 drives the slewing bearing 4 installed thereon to move up and down by means of a hydraulic cylinder, an electric cylinder or an electric cylinder, so that the tire 5 can be aligned with the corresponding position on the chassis to achieve the replacement of the tire 5. The center line of the slewing bearing 4 coincides with the center axis H. The inner ring of the slewing bearing 4 is connected to the lifting platform 3, and the outer ring of the slewing bearing 4 is connected to the mounting plate 113.

[0042] The utility model can realize the clamping of the tire 5 through one degree of freedom, and always make the center of the tire 5 consistent with the center of the slewing support 4.

[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tire clamp, characterized in that: It includes a fixed frame, a movable frame, a connecting rod assembly and a driving member. The fixed frame is provided with a central axis H. The fixed frame includes two slides arranged opposite to each other in the Y direction and a connecting frame connected between the two slides. Both ends of the movable frame are slidably connected to the slides. There are two movable frames. The two movable frames are symmetrically arranged on both sides of the connecting frame along the Z direction. The two movable frames enclose a accommodating space. Each of the movable frames is connected to the connecting frame through a connecting rod assembly. The connecting rod assembly is also connected to the driving member. The driving member is arranged in the connecting frame. The driving member is actuated to make the connecting rod assembly push or pull the two movable frames to move toward or away from each other. When the two movable frames move toward each other, they simultaneously move closer to the central axis H.

2. The tire clamp according to claim 1, characterized in that: Both ends of each movable frame are provided with connecting components, the connecting components at both ends of the same movable frame are symmetrical in the Y direction, and the two connecting rod components connected to the two movable frames are symmetrical in the Z direction.

3. The tire clamp according to claim 1 or 2, characterized in that: The connecting rod assembly includes a first rod and a second rod, a hinge point A is set at one end of the first rod, and the hinge point A is slidably set with the connecting frame, a hinge point C is set at the other end of the first rod, a hinge point D is set on the first rod, one end of the second rod is hinged to the hinge point D, and the other end of the second rod is set at the hinge point B, the hinge point B is hinged to the connecting frame, and the hinge point C is hinged to the movable frame.

4. The tire clamp according to claim 3, characterized in that: The length of the first rod is longer than the length of the second rod.

5. The tire clamp according to claim 3, characterized in that: The connecting frame is provided with a sliding hole extending along the Y direction. The driving member includes a double-headed screw and two sliders threadedly connected to the double-headed screw. The two ends of the slider extend out of the slider in the Z direction and are hinged to the hinge point A.

6. The tire clamp according to claim 5, characterized in that: The driving member also includes an adjusting screw for driving the double-headed screw to rotate; both ends of the double-headed screw are rotatably arranged on the slide, and both ends of the double-headed screw extend out of the outside of the slide to form a first driving end; one end of the adjusting screw is connected to the middle part of the double-headed screw, and the other end of the adjusting screw extends out of the outside of the connecting frame to form a second driving end.

7. The tire clamp according to claim 1, characterized in that: Bearings are arranged at both ends of the movable frame, and the bearings are assembled in the sliding frame in a manner of three rolling surface contacts.

8. The tire clamp according to claim 3, characterized in that: The movable frame includes a frame body and legs detachably connected to both ends of the frame body in the Y direction, the legs extend in the X direction, the legs on the two movable frames enclose the accommodating space, and the hinge point A is hinged to the frame body.

9. The tire clamp according to claim 8, characterized in that: The extended end of the holding leg is hinged with a movable pin, and the movable pin is V-shaped.

10. A tire changing tool, comprising a mobile trolley, characterized in that: It also includes a lifting platform arranged on the mobile trolley and a tire clamp as described in any one of claims 1 to 9, wherein a slewing bearing is installed on the lifting platform, the inner ring of the slewing bearing is connected to the lifting platform, the outer ring of the slewing bearing is connected to the fixed frame of the tire clamp, and the center line of the slewing bearing coincides with the central axis H.

Images