Taper locking mechanism and tire changer

Abstract

The utility model discloses a taper locking mechanism and a tire changer, and the taper locking mechanism comprises an inverted arm seat fixedly arranged on a first mounting base body and a center shaft penetrating through a second mounting base body and rotationally connected with the second mounting base body. The end portion of the center shaft is positioned through cooperation of the conical hole and the elastic conical sleeve piece, when the fastening bolts are installed at the two ends of the center shaft, the fastening bolts extrude the elastic conical sleeve piece and enable the elastic conical sleeve piece to deform under abutting of the inner wall of the conical hole, and therefore the two ends of the center shaft are hooped tightly. The connecting structure can guarantee the stability of the relative position between the center shaft and the inverted arm seat, the center shaft cannot rotate along with the first mounting base body and the second mounting base body when the first mounting base body and the second mounting base body rotate relatively, abrasion of the center shaft is reduced, the service life of the center shaft is prolonged, and meanwhile fastening bolts at the two ends of the center shaft can be prevented from loosening. And the reliability of the locking mechanism is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire removal devices, in particular to a taper locking mechanism and a tire removal machine. Background Art

[0002] Tire changers are used to install and uninstall vehicle tires and can change tires for different vehicles such as cars, motorcycles and heavy trucks.

[0003] In the existing rear inverted arm type tire changer, the inverted arm column and the inverted arm seat are connected by setting a rotating shaft between the two, and the end of the rotating shaft is fixed with bolts. This connection method has the following disadvantages, that is, the rotating shaft of the inverted arm column will rotate with the column during use, which makes the rotating shaft easy to wear and affect the working stability of the inverted arm column. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a taper locking mechanism and a tire changing machine which have simple structure, stable operation and long service life.

[0005] In order to achieve the above objectives, the utility model is implemented through the following technical solutions.

[0006] The present application provides a taper locking mechanism, comprising:

[0007] The inverted arm seat is fixedly arranged on the first mounting base, is provided with a receiving cavity through it, and has two conical holes symmetrically arranged on the opposite side end surfaces and respectively connected with the receiving cavity;

[0008] The central shaft passes through the second mounting base and is rotatably connected to the second mounting base, and fastening bolts are respectively threadedly connected on both end surfaces;

[0009] The inner diameter of the conical hole at one end close to the accommodating cavity is smaller than the inner diameter of the end away from the accommodating cavity, and the two ends of the central axis are respectively located in the two conical holes and do not pass through the conical holes;

[0010] An elastic cone sleeve is embedded in the conical hole, and two elastic cone sleeves are respectively sleeved on both ends of the central axis and protrude out of the conical hole at a corresponding position at one end away from the accommodating cavity;

[0011] The bolt head of the fastening bolt can press against one end of the elastic conical sleeve away from the accommodating cavity so that the elastic conical sleeve deforms and clamps the central axis.

[0012] It is further defined that in the above-mentioned taper locking mechanism, a sleeve coaxial with the central axis is provided through the second mounting base;

[0013] Wherein, the central shaft passes through the shaft sleeve and has a clearance fit with the shaft sleeve.

[0014] It is further defined that in the above-mentioned taper locking mechanism, a locking groove is provided between the inner annular surface and the outer annular surface of the elastic cone sleeve, and the locking groove is connected to the two axial end surfaces of the elastic cone sleeve.

[0015] It is further defined that the above-mentioned taper locking mechanism, wherein the central axis includes a rotating part passing through the second mounting base and two plug parts respectively fixed at both ends of the rotating part and coaxial with the rotating part, the plug parts are located in the conical hole and are provided with a screw hole for installing a fastening bolt at one end away from the rotating part.

[0016] It is further defined that, in the above-mentioned tapered locking mechanism, the radius of the plug-in portion is smaller than the radius of the rotating portion, the elastic conical sleeve is sleeved on the plug-in portion and the end face close to one side of the accommodating cavity can abut against the corresponding end of the rotating portion.

[0017] The present application also provides a tire changing machine, comprising a workbench, a column fixedly connected to the workbench and capable of rotating relative to the workbench, wherein the taper locking mechanism described in any one of the above items is adopted between the workbench and the column;

[0018] The inverted arm seat is fixedly arranged on the workbench, and the central axis passes through the column and is rotatably connected to the column.

[0019] It is further defined that in the above-mentioned tire removal machine, a tire positioning mechanism is provided on the workbench, and a tire removal assembly is provided at one end of the column away from the workbench.

[0020] It is further defined that the above-mentioned tire changing machine further includes a power unit for driving the column to rotate relative to the workbench.

[0021] The utility model has at least the following beneficial effects:

[0022] The positioning of the end of the central shaft is achieved through the cooperation of the tapered hole and the elastic tapered sleeve. When the fastening bolts are installed at both ends of the central shaft, the fastening bolts squeeze the elastic tapered sleeve and make it radially shrink under the resistance of the inner wall of the tapered hole, that is, the two ends of the central shaft are tightened by the deformation of the elastic tapered sleeve. This connection structure can ensure the stability of the relative position between the central shaft and the inverted arm seat. When the first mounting base and the second mounting base rotate relatively, the central shaft will not rotate, thereby reducing the wear of the central shaft and increasing its service life. At the same time, it can prevent the fastening bolts at both ends of the central shaft from loosening, further improving the reliability of the locking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the tire changing machine in an upright state according to an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of the tire changing machine in the embodiment of the present application in a rearward tilted state;

[0025] Figure 3 This is a schematic diagram of the structure of the taper locking mechanism of an embodiment of the present application;

[0026] Figure 4 This is an enlarged schematic diagram of the structure of the "central axis 620" part of the taper locking mechanism of the embodiment of the present application;

[0027] Figure 5 This is a structural schematic diagram of the "inverted arm seat 300" in the taper locking mechanism of the embodiment of the present application;

[0028] Figure 6 This is a structural schematic diagram of the "inverted arm seat 300" in the taper locking mechanism of the embodiment of the present application;

[0029] Figure 7 This is a structural cross-sectional view of the “central axis 620” in the taper locking mechanism of the embodiment of the present application;

[0030] Figure 8 It is a structural schematic diagram of the "elastic cone kit 630" in the taper locking mechanism of an embodiment of the present application.

[0031] Reference numerals

[0032] Workbench 100, tire positioning mechanism 200, inverted arm seat 300, accommodating cavity 310, conical hole 320, column 400, tire removal assembly 500, sleeve 610, center shaft 620, rotating part 621, inserting part 622, screw hole 623, elastic cone kit 630, locking groove 631. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0034] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0035] The taper locking mechanism and the tire changing machine provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0036] like Figures 3 to 8 As shown, the embodiment of the present application provides a taper locking mechanism, including an inverted arm seat 300 fixedly disposed on a first mounting base, and a central shaft 620 penetrating through a second mounting base and rotatably connected to the second mounting base.

[0037] The inverted arm seat 300 is provided with a receiving cavity 310 , and two conical holes 320 respectively connected to the receiving cavity 310 are symmetrically provided on the opposite side end surfaces. The inner diameter of the conical hole 320 close to the receiving cavity 310 is smaller than the inner diameter of the end away from the receiving cavity 310 .

[0038] An elastic conical sleeve 630 is embedded in the conical hole 320, and both ends of the central axis 620 are respectively located in the two conical holes 320 and do not penetrate the conical holes 320. The two elastic conical sleeves 630 are respectively sleeved on both ends of the central axis 620 and protrude out of the corresponding conical holes 320 at one end away from the accommodating cavity 310.

[0039] The two end surfaces of the central shaft 620 are respectively threadedly connected with fastening bolts, and the bolt heads of the fastening bolts can press against the end of the elastic cone sleeve 630 away from the accommodating cavity 310 to make the elastic cone sleeve 630 deform and clamp the central shaft 620 tightly.

[0040] In the embodiment of the present application, the above-mentioned tapered locking mechanism is adopted, and the positioning of the end of the central shaft 620 is achieved through the cooperation of the tapered hole 320 and the elastic tapered sleeve 630. When the fastening bolts are installed at both ends of the central shaft 620, the fastening bolts squeeze the elastic tapered sleeve 630 and make it shrink radially under the resistance of the inner wall of the tapered hole 320, that is, the two ends of the central shaft 620 are tightened by the deformation of the elastic tapered sleeve 630. The connection structure can ensure the stability of the relative position between the central shaft 620 and the inverted arm seat 300. When the first mounting base and the second mounting base rotate relative to each other, the central shaft 620 will not rotate, thereby reducing the wear of the central shaft 620 and increasing its service life. At the same time, it can prevent the fastening bolts at both ends of the central shaft 620 from loosening, further improving the reliability of the locking mechanism.

[0041] In a preferred embodiment, Figure 3 , Figure 4 As shown, a sleeve 610 coaxial with the central axis 620 is provided through the second mounting base.

[0042] The central shaft 620 passes through the shaft sleeve 610 and is loosely matched with the shaft sleeve 610 .

[0043] In a preferred embodiment, Figure 3 , Figure 4 , Figure 8 As shown, a locking groove 631 is provided between the inner and outer annular surfaces of the elastic conical sleeve 630 , and the locking groove 631 is connected to both axial end surfaces of the elastic conical sleeve 630 .

[0044] It can be understood that the locking groove 631 can provide radial contraction space for the elastic conical sleeve 630. When the fastening bolt presses against the end of the elastic conical sleeve 630, the elastic conical sleeve 630 can move in the conical hole 320 toward the side close to the accommodating cavity 310. Under the resistance of the tapered inner wall of the conical hole 320, the elastic conical sleeve 630 can shrink radially to tighten the central axis 620.

[0045] It can be understood that when the elastic cone kit 630 is made of flexible and elastic material, when the fastening bolt presses against the end of the elastic cone kit 630, the elastic cone kit 630 can be compressed axially and expanded radially, and at this time, the center axis 620 can also be tightened, and the locking groove 631 can be omitted.

[0046] In a preferred embodiment, Figure 3 , Figure 4 , Figure 7 As shown, the central axis 620 includes a rotating portion 621 that passes through the second mounting base and two inserting portions 622 that are respectively fixedly disposed at both ends of the rotating portion 621 and are coaxial with the rotating portion 621. The inserting portion 622 is located in the conical hole 320 and is provided with a screw hole 623 for installing a fastening bolt at one end away from the rotating portion 621.

[0047] The radius of the inserting portion 622 is smaller than the radius of the rotating portion 621 , and the elastic conical sleeve 630 is sleeved on the inserting portion 622 and the end surface close to the accommodating cavity 310 can abut against the corresponding end of the rotating portion 621 .

[0048] It can be understood that the step structure that cooperates with the elastic cone kit 630 is formed by the rotating part 621 and the inserting part 622. When the fastening bolt presses against the elastic cone kit 630, the elastic cone kit 630 can be limited away from one end of the fastening bolt, thereby ensuring the relative position stability of the elastic cone kit 630 and the inverted arm seat 300 when the elastic cone kit 630 locks the central axis 620.

[0049] like Figures 1 to 4 As shown, an embodiment of the present application provides a tire removal machine, including a workbench 100, a column 400 fixedly connected to the workbench 100 and capable of rotating relative to the workbench 100, and a power unit for driving the column 400 to rotate relative to the workbench 100, a tire positioning mechanism 200 is provided on the workbench 100, and a tire removal assembly 500 is provided at one end of the column 400 away from the workbench 100.

[0050] The taper locking mechanism described in the above embodiment is provided between the workbench 100 and the column 400 , the inverted arm seat 300 is fixedly arranged on the workbench 100 , and the central axis 620 passes through the column 400 and is rotatably connected to the column 400 .

[0051] Initially, the wheel rim is positioned on the tire positioning mechanism 200, and when the tire is removed, the tire bead is loosened by the tire removal assembly 500. When the tire is completely detached from the wheel rim, the power unit drives the column 400 to swing away from the tire positioning mechanism 200 to avoid position interference with the tire.

[0052] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A taper locking mechanism, characterized in that: include: The inverted arm seat is fixedly arranged on the first mounting base, is provided with a receiving cavity through it, and has two conical holes symmetrically arranged on the opposite side end surfaces and respectively connected with the receiving cavity; The central shaft passes through the second mounting base and is rotatably connected to the second mounting base, and fastening bolts are respectively threadedly connected on both end surfaces; The inner diameter of the conical hole at one end close to the accommodating cavity is smaller than the inner diameter of the end away from the accommodating cavity, and the two ends of the central axis are respectively located in the two conical holes and do not pass through the conical holes; An elastic cone sleeve is embedded in the conical hole, and two elastic cone sleeves are respectively sleeved on both ends of the central axis and protrude out of the conical hole at a corresponding position at one end away from the accommodating cavity; The bolt head of the fastening bolt can press against one end of the elastic conical sleeve away from the accommodating cavity so that the elastic conical sleeve deforms and clamps the central axis.

2. A taper locking mechanism according to claim 1, characterized in that: The second mounting base is provided with a sleeve coaxial with the central axis; Wherein, the central shaft passes through the shaft sleeve and has a clearance fit with the shaft sleeve.

3. A taper locking mechanism according to claim 1, characterized in that: A locking groove is provided between the inner annular surface and the outer annular surface of the elastic cone sleeve, and the locking groove is connected to both axial end surfaces of the elastic cone sleeve.

4. A taper locking mechanism according to claim 1, characterized in that: The central axis includes a rotating part that passes through the second mounting base and two inserting parts that are respectively fixed at both ends of the rotating part and coaxial with the rotating part. The inserting part is located in the conical hole and has a screw hole for installing a fastening bolt at one end away from the rotating part.

5. A taper locking mechanism according to claim 4, characterized in that: The radius of the inserting portion is smaller than the radius of the rotating portion. The elastic conical sleeve is sleeved on the inserting portion and the end surface close to one side of the accommodating cavity can abut against the corresponding end of the rotating portion.

6. A tire changing machine, characterized in that: It comprises a workbench, a column fixedly connected to the workbench and capable of rotating relative to the workbench, wherein the workbench and the column are provided with a taper locking mechanism as claimed in any one of claims 1 to 5; Wherein, the inverted arm seat is fixedly arranged on the workbench, and the central axis penetrates the column and is rotatably connected with the column.

7. A tire changing machine according to claim 6, characterized in that: The workbench is provided with a tire positioning mechanism, and the end of the column away from the workbench is provided with a tire removal assembly.

8. A tire changing machine according to claim 6, characterized in that: The utility model also comprises a power unit for driving the column to rotate relative to the workbench.

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