A tire tightening apparatus

Abstract

The application discloses a tire tightening device and relates to the field of automobile assembly. When tire nut tightening is performed, the tire tightening device can be used, five tightening shaft modules are simultaneously located in a working state, that is, the included angle between every two adjacent tightening shaft modules is 72 DEG, and the tire tightening device can cope with a tire containing five nuts; four tightening shaft modules are simultaneously located in the working state, and one tightening shaft module is located in a avoiding state, that is, the included angle between every two adjacent tightening shaft modules is 90 DEG, and the tire tightening device can cope with a tire containing four nuts; three tightening shaft modules are simultaneously located in the working state, and two tightening shaft modules are located in the avoiding state, that is, the included angle between every two adjacent tightening shaft modules is 120 DEG, and the tire tightening device can cope with a tire containing three or six nuts. Since the tire tightening device is used, the tire tightening device can realize the conversion of five-axis, four-axis and three-axis states, and the universality of the tire tightening device is improved.

Description

Technical Field

[0001] This application relates to the field of automobile assembly, and in particular to a tire tightening device. Background Technology

[0002] The tire tightening equipment has two modes: five-axis and four-axis. In five-axis mode, it can tighten five tire nuts simultaneously; in four-axis mode, it can tighten four tire nuts simultaneously. However, the above-mentioned tire tightening equipment cannot tighten six tire nuts simultaneously. Therefore, it is necessary to develop additional equipment capable of tightening six tire nuts simultaneously.

[0003] Therefore, how to improve the versatility of tire tightening equipment is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] This application proposes a tire tightening device that enables the conversion between five-axis, four-axis, and three-axis modes, thereby improving the versatility of the tire tightening device.

[0005] To achieve the above objectives, this application discloses the following technical solutions:

[0006] A tire tightening device includes a tightening machine; the tightening machine includes a fixed plate and five tightening shaft modules, wherein the tightening shaft modules are disposed on the fixed plate; two tightening shaft modules are movable along a direction perpendicular to the surface of the fixed plate to switch between a working state and a clearance state; three tightening shaft modules are movable circumferentially along the fixed plate to adjust the included angle between the tightening shaft modules in the working state, the included angles being 120°, 90° and 72°.

[0007] In some embodiments, two tightening shaft modules movable in a direction perpendicular to the surface of the fixed plate, and three tightening shaft modules movable in a circumferential direction along the fixed plate are spaced apart on the fixed plate.

[0008] In some embodiments, each of the five tightening shaft modules includes a diameter-adjusting assembly and a tightening shaft, the diameter-adjusting assembly being used to adjust the radius of the tightening shaft relative to the fixed plate.

[0009] In some embodiments, the variable diameter assembly includes a servo motor, a transmission device, a variable diameter guide rail, and a variable diameter slider;

[0010] The servo motor is fixedly connected to the mounting plate and is also connected to the transmission device for transmission.

[0011] The transmission device is connected to the variable diameter slider, driving the variable diameter slider to slide on the variable diameter guide rail, which is located on the fixed plate.

[0012] In some embodiments, in two tightening shaft modules that can move along a direction perpendicular to the surface of the fixed plate, the tightening shaft module includes a variable diameter assembly, a tightening shaft, and a first telescopic assembly. The fixed end of the first telescopic assembly is disposed on the variable diameter assembly, and the movable end of the first telescopic assembly can move along a direction perpendicular to the surface of the fixed plate. The tightening shaft is located at the movable end of the first telescopic assembly.

[0013] In some embodiments, the first telescopic component includes a first cylinder, a first slide rail, and a first slider. The first cylinder is fixed to one end of the first slide rail, and the telescopic end of the first cylinder is connected to the first slider and drives the first slider to move on the first slide rail. The other end of the first slide rail is fixed to the variable diameter component.

[0014] In some embodiments, the fixing plate is provided with a first limiting member;

[0015] In the three tightening shaft modules that can move circumferentially along the fixed plate, the tightening shaft module includes a diameter changing component, a tightening shaft, and a second telescopic component. The diameter changing component is provided with a second limiting component that cooperates with the first limiting component. One end of the second telescopic component is provided on the diameter changing component, and the other end of the second telescopic component is rotatably provided on the fixed plate so that the diameter changing component can move circumferentially along the fixed plate.

[0016] In some embodiments, the second telescopic component includes a second cylinder, the first limiting member includes a limiting groove, and the second limiting member includes an inner guide wheel and an outer guide wheel. The inner guide wheel is slidably engaged with the inner side of the fixed plate, and the outer guide wheel is slidably engaged with the outer side of the fixed plate.

[0017] One end of the second cylinder is rotatably mounted on the fixed plate, and the other end of the second cylinder is rotatably mounted on the diameter-changing assembly through a limiting groove.

[0018] Some embodiments also include operating handles, which are evenly arranged along the outer edge of the tightening machine.

[0019] Some embodiments also include a mounting beam, which includes a crossbeam and a hanger rod. The crossbeam is provided with a hanger rod slide rail. One end of the hanger rod is connected to the hanger rod slide rail and can slide along the hanger rod slide rail. The other end of the hanger rod is connected to a tightening machine.

[0020] As can be seen from the above technical solutions, when tightening tire nuts, the tire tightening equipment of this solution can be used. With five tightening shaft modules simultaneously in working mode (i.e., the angle between any two adjacent tightening shaft modules is 72°), it can handle tires with five nuts; with four tightening shaft modules simultaneously in working mode and one tightening shaft module in a clearance mode (i.e., the angle between any two adjacent tightening shaft modules is 90°), it can handle tires with four nuts; and with three tightening shaft modules simultaneously in working mode and two tightening shaft modules in a clearance mode (i.e., the angle between any two adjacent tightening shaft modules is 120°), it can handle tires with three or six nuts. Because the tire tightening equipment of this solution can switch between five-axis, four-axis, and three-axis modes, the versatility of the tire tightening equipment is improved. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings, all of which fall within the scope of protection of this invention. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structure or operation.

[0022] Figure 1 A perspective view of the tightening machine provided in the embodiments of this application;

[0023] Figure 2a This is a front view of the tightening machine provided in an embodiment of this application;

[0024] Figure 2b A side cross-sectional view of the tightening machine provided in an embodiment of this application;

[0025] Figure 3 A front view of the three tightening shafts in the working state provided in the embodiments of this application;

[0026] Figure 4 A front view of the four tightening shafts in the working state provided in the embodiments of this application;

[0027] Figure 5 A front view of the five tightening shafts in the working state provided in the embodiments of this application;

[0028] Figure 6 A perspective view of a tightening shaft module that can move along a direction perpendicular to the surface of the fixed plate, provided for an embodiment of this application;

[0029] Figure 7A perspective view of a tightening shaft module that can move circumferentially along a fixed plate, provided in an embodiment of this application;

[0030] Figure 8 A plan view of the second telescopic component provided in an embodiment of this application;

[0031] Figure 9 A perspective view of a tire tightening device provided in an embodiment of this application.

[0032] Wherein: 10 - tire tightening equipment; 100 - tightening machine; 200 - hanging beam;

[0033] 110-Fixed plate; 111-First limiting component; 112-Second limiting component; 120-Tightening shaft module; 121-Variable diameter assembly; 122-Tightening shaft; 123-First telescopic assembly; 124-Second telescopic assembly; 130-Operating handle; 210-Crossbeam; 220-Hanging rod; 221-Hanging rod slide rail

[0034] 1121 - Inner guide wheel; 1122 - Outer guide wheel;

[0035] 1211-Servo motor; 1212-Transmission device; 1213-Variable diameter guide rail; 1214-Variable diameter slider;

[0036] 1231 - First cylinder; 1232 - First slide rail; 1233 - First slider;

[0037] 1241 - Second cylinder. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0039] To improve the versatility of the tire tightening device 10, this application describes the structure of the tire tightening device 10 in detail with reference to the accompanying drawings: as follows Figures 1 to 9As shown, this application provides a tire tightening device 10, including a tightening machine 100; the tightening machine 100 includes a fixed plate 110 and five tightening shaft modules 120, wherein the tightening shaft modules 120 are disposed on the fixed plate 110; two tightening shaft modules 120 can move along a direction perpendicular to the plate surface of the fixed plate 110 to switch between a working state and a clearance state; three tightening shaft modules 120 can move circumferentially along the fixed plate 110 to adjust the included angle between the tightening shaft modules 120 in the working state, the included angle including 120°, 90° and 72°.

[0040] When tightening tire nuts, the tire tightening device 10 of this solution can be used. Five tightening shaft modules 120 are simultaneously in the working state, meaning the angle between any two adjacent tightening shaft modules 120 is 72°, which can handle tires with five nuts; four tightening shaft modules 120 are simultaneously in the working state, and one tightening shaft module 120 is in a clearance state, meaning the angle between any two adjacent tightening shaft modules 120 is 90°, which can handle tires with four nuts; three tightening shaft modules 120 are simultaneously in the working state, and two tightening shaft modules 120 are in a clearance state, meaning the angle between any two adjacent tightening shaft modules 120 is 120°, which can handle tires with three or six nuts. Because the tire tightening device 10 of this solution can switch between five-axis, four-axis, and three-axis states, the versatility of the tire tightening device 10 is improved.

[0041] It should be explained that, for the reader's convenience in understanding the technical solution of this application, the following interpretation is made: the working state can be understood as the state in which the tightening shaft module 120 is capable of performing tightening operations, and the avoidance state can be understood as avoiding other tightening shaft modules 120 so as not to affect the tightening operations of other tightening shaft modules 120. In this application example, avoidance and return to position are achieved by moving two tightening shaft modules 120 along a direction perpendicular to the surface of the fixed plate 110. Of course, other movement methods can also be used for avoidance or return to position in this application, which will not be described in detail here.

[0042] The tightening machine 100 of this application can simultaneously tighten several tire nuts through the tightening shaft module 120. The switching principle of the working state of the tightening shaft module 120 will be described in detail below.

[0043] This application includes five tightening shaft modules 120, of which two tightening shaft modules 120 movable in a direction perpendicular to the surface of the fixed plate 110 and three tightening shaft modules 120 movable in a circumferential direction of the fixed plate 110 are arranged at intervals on the fixed plate 110. It can be understood that at least one tightening shaft module 120 movable in a circumferential direction of the fixed plate 110 is arranged between the two tightening shaft modules 120 movable in a direction perpendicular to the surface of the fixed plate 110.

[0044] The advantage of this arrangement is that it reduces the displacement distance of the tightening shaft module 120 that moves circumferentially along the fixed plate 110. The overall operating principle of the five tightening shaft modules 120 will be described in detail below with reference to the attached drawings.

[0045] In this application, the included angle between two tightening shaft modules 120 that can move along a direction perpendicular to the surface of the fixed plate 110 is fixed at 144°. The three tightening shaft modules 120 that can move circumferentially along the fixed plate 110 are always in a working state, and the included angles between them are adjustable. See [link to application]. Figure 3 Two tightening shaft modules 120 that can move along the direction perpendicular to the surface of the fixed plate 110 are simultaneously in the avoidance state, and three tightening shaft modules 120 that can move circumferentially along the fixed plate 110 are at 120° to each other. At this time, there are three tightening shaft modules 120 in the working state, which is called the three-axis state.

[0046] When switching from three-axis to four-axis mode, see [link / reference]. Figure 4 One of the tightening shaft modules 120, which can move along the direction perpendicular to the surface of the fixed plate 110, moves toward the fixed plate 110 and is in the working state, while the other remains in the avoidance state; the two tightening shaft modules 120, which can move along the circumference of the fixed plate 110, move 30° along the circumference of the fixed plate 110 at the same time, while the other tightening shaft module 120, which can move along the circumference of the fixed plate 110, does not move. At this time, the four tightening shaft modules 120 in the working state are at 90° to each other, which is called the four-axis state.

[0047] When switching from four-axis to five-axis mode, see [link / reference]. Figure 5 One tightening shaft module 120, which is in an avoidance state and can move along the direction perpendicular to the surface of the fixed plate 110, moves toward the fixed plate 110 and is in the working state. Two tightening shaft modules 120, which can move circumferentially along the fixed plate 110, move 18° simultaneously. One tightening shaft module 120, which can move circumferentially along the fixed plate 110, moves 36°. Finally, all five tightening shaft modules 120 are in the working state at the same time and are 72° apart from each other. This is called the five-axis state.

[0048] It is evident that arranging the five tightening shaft modules 120 in this way allows each tightening shaft module 120, which can move circumferentially along the fixed plate 110, to move a maximum of 36°, thus enabling switching between the three states. However, if there is no gap of at least one other tightening shaft module 120 that can move circumferentially along the fixed plate 110 between two tightening shaft modules 120 that can move perpendicularly to the plate surface of the fixed plate 110 (i.e., the angle between the two tightening shaft modules 120 is 72°), then following the same method, at most a single tightening shaft module 120 needs to move 54° circumferentially along the fixed plate 110. This not only prolongs the switching time but also increases energy waste. Therefore, the tightening shaft module 120 arrangement method of this embodiment is preferred.

[0049] It should be noted that when switching from a five-axis state to a four-axis state, or from a four-axis state to a three-axis state, reverse reasoning can be performed according to the above deductive method. This embodiment is still within the protection scope of this application, and will not be elaborated further here.

[0050] The above describes the switching principle between the five-axis, four-axis, and three-axis states of the five tightening shaft modules 120. Next, we will introduce the working principle of the tightening shaft module 120 in detail.

[0051] Each of the five tightening shaft modules 120 includes a diameter-changing assembly 121 and a tightening shaft 122. The diameter-changing assembly 121 is used to adjust the radius of the tightening shaft 122 relative to the fixed plate 110. In simple terms, the nuts on a tire are arranged in a circle at the center of the tire. The tightening shafts 122 correspond one-to-one with the distribution of the nuts, thereby achieving synchronous tightening of the nuts and accommodating tires of different radii.

[0052] Taking a five-nut tire as an example, the pitch circle diameter formed by the line connecting the five nuts of model A is 114.3 mm, and the pitch circle diameter formed by the line connecting the five nuts of model B is 100 mm. When the tightening shaft module 120 tightens the tire nuts of model A, the pitch circle diameter formed by the distance between the contact points of the five tightening shaft modules 120 and the nuts is 114.3 mm. When the tire nuts of model A are tightened and the tire nuts of model B need to be tightened, the radius of the tightening shaft 122 relative to the fixed plate 110 can be adjusted by the diameter reducing assembly 121, thereby adjusting the pitch circle diameter formed by the distance between the contact points of the tightening shaft 122 and the nuts to 100 mm.

[0053] Therefore, the radius of the circle formed by the tightening shafts 122 can be adjusted according to the different tire radii by using the variable diameter component 121, thereby achieving flexible matching between the tire tightening device 10 and different vehicle models.

[0054] Having introduced the working principle of the tightening shaft module 120, the structure of the variable diameter assembly 121 will be described in detail next.

[0055] See Figure 2a and Figure 2b To adjust the pitch circle radius of the tightening shaft module 120, the variable diameter assembly 121 includes a servo motor 1211, a transmission device 1212, a variable diameter guide rail 1213, and a variable diameter slider 1214. The servo motor 1211 is fixedly connected to the fixed plate 110 and is also connected to the transmission device 1212. To prevent collisions during the movement of the tightening shaft modules 120, the servo motor 1211 is arranged along the radial direction of the fixed plate 110. The transmission device 1212 is connected to the variable diameter slider 1214 via a lead screw, driving the slider 1214 to slide on the variable diameter guide rail 1213; the variable diameter guide rail 1213 is mounted on the fixed plate 110. The sliding of the variable diameter slider 1214 along the variable diameter guide rail 1213 achieves the displacement of the tightening shaft 122 along the radial direction of the fixed plate 110.

[0056] Since the tightening shaft module 120, which can move along the direction perpendicular to the plate surface of the fixed plate 110, and the tightening shaft module 120, which can move circumferentially along the fixed plate 110, have their own characteristics in the variable diameter assembly 121 configured therein, the variable diameter assembly 121 of the two tightening shaft modules 120 will be introduced in detail later in conjunction with the two tightening shaft modules 120.

[0057] The following section will describe in detail the specific structure of the tightening shaft module 120, which can move along the direction perpendicular to the surface of the fixed plate 110.

[0058] See Figure 6 The tightening shaft module 120, which can move along a direction perpendicular to the surface of the fixed plate 110, includes a diameter-changing assembly 121, a tightening shaft 122, and a first telescopic assembly 123. The fixed end of the first telescopic assembly 123 is disposed on the diameter-changing assembly 121, and the moving end of the first telescopic assembly 123 can move along a direction perpendicular to the surface of the fixed plate 110. The tightening shaft 122 is located at the moving end of the first telescopic assembly 123. The first telescopic assembly 123 is the key to enabling the tightening shaft module 120 to move along a direction perpendicular to the surface of the fixed plate 110.

[0059] The first telescopic component 123 can achieve linear motion. In some embodiments of this application, the first telescopic component 123 can be a piston cylinder such as a cylinder or oil cylinder, or a linear motor, or a lead screw and nut mechanism, etc. Any structure that can drive the tightening shaft 122 to move linearly can be understood as the first telescopic component 123.

[0060] Specifically, the first telescopic assembly 123 includes a first cylinder 1231, a first slide rail 1232, and a first slider. The first cylinder 1231 serves as a power source and is fixed to one end of the first slide rail 1232. The telescopic end of the first cylinder 1231 is connected to the first slider and drives the first slider to move on the first slide rail 1232. At this time, the tightening shaft 122 is fixed to the first slider through the tightening shaft 122 mounting seat, which enables the tightening shaft 122 to move along the first slide rail 1232. The other end of the first slide rail 1232 is fixedly connected to the diameter-changing slider 1214 of the diameter-changing assembly 121. The movement of the diameter-changing slider 1214 drives the overall movement of the first telescopic assembly 123 and the tightening shaft 122.

[0061] In order to enhance the strength of the first telescopic component 123, in some embodiments, the first slide rail 1232 is fixed on the first slide rail base, one end of the first slide rail base is fixedly connected to the first cylinder 1231, and the other end of the first slide rail base is fixedly connected to the diameter-changing slider 1214 of the diameter-changing component 121. The advantage of doing so is that a rigid connection is achieved through the first slide rail base, which effectively increases the movement strength of the first telescopic component 123.

[0062] The above describes the structural features of the tightening shaft module 120, which can move along the direction perpendicular to the surface of the fixed plate 110. Next, we will introduce the specific structural features of the tightening shaft module 120, which can move circumferentially along the fixed plate 110.

[0063] The tightening shaft module 120, which is movable circumferentially along the fixed plate 110, includes a variable diameter assembly 121, a tightening shaft 122, and a second telescopic assembly 124. See also... Figure 7 The mounting base of the tightening shaft 122 is directly connected to the diameter-changing slider 1214 of the diameter-changing assembly 121. The diameter-changing movement of the tightening shaft module 120 can be achieved by sliding the diameter-changing slider 1214. This is the first major difference between the tightening shaft module 120, which can move circumferentially along the fixed plate 110, and the tightening shaft module 120, which can move perpendicular to the surface of the fixed plate 110. The second major difference lies in the second telescopic assembly 124. One end of the second telescopic assembly 124 is mounted on the diameter-changing assembly 121, and the other end is rotatably mounted on the fixed plate 110, allowing the diameter-changing assembly 121 to move circumferentially along the fixed plate 110. The second telescopic assembly 124 is key to enabling the tightening shaft module 120 to move circumferentially along the fixed plate 110. The structural features of the second telescopic assembly 124 will be described in detail below.

[0064] The second telescopic component 124 can achieve linear motion. In some embodiments of this application, the second telescopic component 124 can be a piston cylinder such as a cylinder or oil cylinder, or a linear motor, or a lead screw and nut mechanism, etc. Any structure that can drive the tightening shaft 122 to move linearly can be understood as the second telescopic component 124.

[0065] See Figure 8 The second telescopic component 124 includes a second cylinder 1241. One end of the second cylinder 1241 is rotatably mounted on the fixed plate 110, and the other end of the second cylinder 1241 passes through the fixed plate 110 and is mounted on the variable diameter component 121. It should be noted that since the tightening shaft module 120, which can move circumferentially along the fixed plate 110, needs to move along the fixed plate 110, a first limiting member 111 needs to be provided on the fixed plate 110 to limit the displacement angle and distance of the tightening shaft module 120. Therefore, preferably, the first limiting member 111 is set as a limiting groove with a certain curvature. The second cylinder 1241 passes through this limiting groove via a connecting member, thereby rotatably connecting with the variable diameter component 121. Of course, setting the second cylinder 1241 and the variable diameter assembly 121 at the two ends of the fixed plate 110 has another advantage: it helps to limit the directional movement of the second cylinder 1241 relative to the vertical fixed plate 110, ensuring that the tightening shaft module 120 moves in the preset direction and ensuring the stability of the system operation.

[0066] See also Figure 8 To facilitate the circumferential movement of the variable diameter assembly 121 along the fixed plate 110, a second limiting member 112 is provided on the variable diameter assembly 121 to cooperate with the first limiting member 111. The second limiting member 112 includes an inner guide wheel 1121 and an outer guide wheel 1122. The inner guide wheel 1121 is slidably engaged with the inner side of the fixed plate 110, and the outer guide wheel 1122 is slidably engaged with the outer side of the fixed plate 110. Through the inner and outer engagement of the inner guide wheel 1121 and the outer guide wheel 1122, the friction is small when the variable diameter assembly 121 moves along the circumferential direction of the fixed plate 110, and the axial movement of the variable diameter assembly 121 along the fixed plate 110 is further restricted.

[0067] Preferably, to enhance the structural stability of the variable diameter assembly 121, a variable diameter guide rail mounting base is typically provided, see [reference]. Figure 7 The variable diameter guide rail 1213 is mounted on the variable diameter guide rail mounting base, and each variable diameter assembly 121 has at least two second limiting members 112 mounted on the variable diameter guide rail mounting base. By setting the variable diameter guide rail mounting base, the structural strength of the second limiting members 112 can be effectively enhanced, ensuring the stable operation of the variable diameter assembly 121.

[0068] The above provides an overview of the specific structure and operating principle of the tightening shaft module 120.

[0069] See Figure 1 Normally, to facilitate the operation of the tightening machine 100, operating handles 130 are evenly arranged on the outer edge of the tightening machine 100. The operator can hold the operating handles 130 with both hands at the same time to adjust the position of the tightening machine 100 so that the tightening shaft 122 contacts the tire nut, thereby achieving the tightening of the tire nut.

[0070] See Figure 9 To facilitate the movement of the tightening machine 100, this application also includes a connecting beam 200, which comprises a crossbeam 210 and a hanger 220. The crossbeam 210 is fixed to a support frame or the roof of a building, and is equipped with a hanger slide rail 211. One end of the hanger 220 is connected to the hanger slide rail 211 and can slide along the hanger slide rail 211, while the other end of the hanger 220 is connected to the tightening machine 100. Preferably, the hanger slide rails 211 can be arranged in a crisscross pattern to allow for multi-directional movement of the tightening machine 100.

[0071] In the above context, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0072] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0073] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0074] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A tire tightening device, characterized in that, Includes a tightening machine (100); the tightening machine (100) includes a fixed plate (110) and five tightening shaft modules (120), wherein the tightening shaft modules (120) are disposed on the fixed plate (110); The two tightening shaft modules (120) can move along a direction perpendicular to the surface of the fixed plate (110) to switch between working state and avoidance state; The three tightening shaft modules (120) are movable circumferentially along the fixed plate (110) to adjust the included angles between the tightening shaft modules (120) in the working state, the included angles being 120°, 90° and 72°.

2. The tire tightening device as described in claim 1, characterized in that, Two tightening shaft modules (120) that can move along a direction perpendicular to the surface of the fixed plate (110), and three tightening shaft modules (120) that can move circumferentially along the fixed plate (110) are spaced apart on the fixed plate (110).

3. The tire tightening device as described in claim 1, characterized in that, Each of the five tightening shaft modules (120) includes a diameter-changing assembly (121) and a tightening shaft (122), the diameter-changing assembly (121) being used to adjust the radius of the tightening shaft (122) relative to the fixed plate (110).

4. The tire tightening device as described in claim 3, characterized in that, The variable diameter assembly (121) includes a servo motor (1211), a transmission device (1212), a variable diameter guide rail (1213), and a variable diameter slider (1214). The servo motor (1211) is fixedly connected to the fixed plate (110) and is connected to the transmission device (1212) in a transmission manner; The transmission device (1212) is connected to the variable diameter slider (1214) and drives the variable diameter slider (1214) to slide on the variable diameter guide rail (1213); the variable diameter guide rail (1213) is located on the fixed plate (110).

5. A tire tightening device as described in claim 3, characterized in that, In the two tightening shaft modules (120) that can move along a direction perpendicular to the plate surface of the fixed plate (110), the tightening shaft module (120) includes the variable diameter assembly (121), the tightening shaft (122) and the first telescopic assembly (123). The fixed end of the first telescopic assembly (123) is disposed on the variable diameter assembly (121), and the moving end of the first telescopic assembly (123) can move along a direction perpendicular to the plate surface of the fixed plate (110). The tightening shaft (122) is located at the moving end of the first telescopic assembly (123).

6. The tire tightening device as described in claim 5, characterized in that, The first telescopic component (123) includes a first cylinder (1231), a first slide rail (1232), and a first slider (1233). The first cylinder (1231) is fixed to one end of the first slide rail (1232). The telescopic end of the first cylinder (1231) is connected to the first slider (1233) and drives the first slider (1233) to move on the first slide rail (1232). The other end of the first slide rail (1232) is fixed to the variable diameter component (121).

7. The tire tightening device as described in claim 3, characterized in that, The fixing plate (110) is provided with a first limiting member (111); In the three tightening shaft modules (120) that can move circumferentially along the fixed plate (110), the tightening shaft module (120) includes the variable diameter assembly (121), the tightening shaft (122), and the second telescopic assembly (124). The variable diameter assembly (121) is provided with a second limiting member (112) that cooperates with the first limiting member (111). One end of the second telescopic assembly (124) is disposed on the variable diameter assembly (121), and the other end of the second telescopic assembly (124) is rotatably disposed on the fixed plate (110) so that the variable diameter assembly (121) can move circumferentially along the fixed plate (110).

8. The tire tightening device as described in claim 7, characterized in that, The second telescopic component (124) includes a second cylinder (1241), the first limiting member (111) includes a limiting groove, and the second limiting member (112) includes an inner guide wheel (1121) and an outer guide wheel (1122). The inner guide wheel (1121) is slidably engaged with the inner side of the fixed plate (110), and the outer guide wheel (1122) is slidably engaged with the outer side of the fixed plate (110). One end of the second cylinder (1241) is rotatably mounted on the fixed plate (110), and the other end of the second cylinder (1241) is rotatably mounted on the variable diameter assembly (121) through the limiting groove.

9. A tire tightening device as described in claim 1, characterized in that, It also includes an operating handle (130), which is evenly arranged along the outer edge of the tightening machine (100).

10. A tire tightening device as described in claim 1, characterized in that, It also includes a hanging beam (200), which includes a crossbeam (210) and a hanger rod (220). The crossbeam (210) is provided with a hanger rod slide rail (211). One end of the hanger rod (220) is connected to the hanger rod slide rail (211) and can slide along the hanger rod slide rail (211). The other end of the hanger rod (220) is connected to the tightening machine (100).

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