Tire post-inflation device capable of steplessly adjusting rim width

Abstract

The invention discloses a tire post-inflation device capable of steplessly adjusting the width of a rim. A controller is electrically connected with a first linear driving mechanism, and the first linear driving mechanism is arranged on a frame; the pull rod is connected with the first linear driving mechanism; the pull rod penetrates through the opening and closing mechanism, before the pull rod ascends or descends, the opening and closing mechanism is switched to an opening state from a combined state so as to release the clamped pull rod, and after the pull rod ascends or descends to a set position, the opening and closing mechanism is switched to the combined state from the opening state so as to clamp the pull rod; the floating adjusting mechanism supports the opening and closing mechanism, the third linear driving mechanism is fixed to the frame, and the floating adjusting mechanism is electrically connected with the controller. The third linear driving mechanism is connected with the pull rod and the second sealing assembly, and the floating adjusting mechanism is electrically connected with the controller. According to the invention, the width of the rim can be steplessly adjusted so as to adapt to inflation of tires with different sizes.

Description

Technical Field

[0001] The invention relates to a tire post-vulcanization inflation device, in particular to a tire post-inflation device with stepless rim width adjustment. Background Art

[0002] The tire post-inflation device is installed at the rear side of the vulcanizer. During the tire vulcanization process, in order to prevent the tire from deforming during the cooling process after high-temperature vulcanization, the tire that has just been high-temperature vulcanized is usually placed on the post-inflation device for cooling and shaping after inflation to ensure the shape, size and physical properties of the tire, thereby ensuring the quality of the tire.

[0003] CN101544035A discloses a two-station four-point balance-type rear inflation device, wherein the rim width adjustment mechanism includes a worm, a screw with a worm gear, a locking sleeve and a lower chuck, wherein the worm is meshingly connected with the worm gear, and the locking sleeve is moved up and down axially by a threaded pair connected to the screw to change the rim width size, and the lower chuck is mounted on the locking sleeve through a lower chuck seat, and the locking sleeve is engageably connected to the locking shaft.

[0004] The above-mentioned rear inflation device rotates the worm when the rim width needs to be adjusted, and the worm drives the worm wheel to rotate, thereby rotating the screw. Since the screw and the locking sleeve form a screw mechanism, the rotation of the screw drives the locking sleeve to rise or fall, thereby adjusting the width of the rim.

[0005] The rim width in the above-mentioned rear inflation device is adjusted by a motor and a screw. This adjustment method has the following drawbacks:

[0006] First, it requires many parts, has a complex structure, and is difficult to operate and maintain.

[0007] Second, a locking structure needs to be configured, which is relatively expensive.

[0008] Third, the rim width is adjusted by a screw. Since there is a gap between the thread fit of the nut and the screw, in high-precision applications, it is usually necessary to configure an anti-backlash mechanism to eliminate the thread fit gap. Therefore, the above-mentioned method of adjusting the rim width by a screw still has the defect that the adjustment accuracy cannot meet the design requirements of the drawing. Summary of the Invention

[0009] The invention provides a tire rear inflation device with stepless adjustment of rim width. The invention can perform stepless adjustment on the rim width to adapt to the inflation of tires of different sizes.

[0010] The technical solutions to the above technical problems are as follows:

[0011] A tire rear inflation device with stepless rim width adjustment includes a frame, a first sealing assembly fixed to the frame, a second sealing assembly located above the first sealing assembly, and a controller, and further includes: a first linear drive mechanism electrically connected to the controller, the first linear drive mechanism being disposed on the frame;

[0012] a pull rod connected to the first linear drive mechanism;

[0013] An opening and closing mechanism electrically connected to the controller, wherein the pull rod passes through the opening and closing mechanism, and the opening and closing mechanism switches from a coupled state to an open state to release the clamped pull rod before the pull rod is raised or lowered, and switches from an open state to a coupled state to clamp the pull rod after the pull rod is raised or lowered to a set position;

[0014] a floating adjustment mechanism for driving the opening and closing mechanism to rise or fall, the floating adjustment mechanism supporting the opening and closing mechanism, the third linear drive mechanism being fixed to the frame, and the floating adjustment mechanism being electrically connected to the controller;

[0015] A third linear drive mechanism drives the second sealing assembly to cooperate with the tire, the third linear drive mechanism is connected to the pull rod, the third linear drive mechanism is connected to the second sealing assembly, and the floating adjustment mechanism is electrically connected to the controller.

[0016] The present invention has the following advantages:

[0017] 1. The number of parts in the rear inflation device of the tire is greatly reduced, which not only reduces the cost but also makes it more convenient to use and maintain, shortening the maintenance cycle.

[0018] 2. With this tire rear inflation device, there is no need to flip between workstations, which is easy to adjust and can be used to inspect and maintain a single workstation.

[0019] 3. The rear tire inflation device adopts the design of opening and closing mechanism plus floating device to achieve stepless adjustment of rim width. It does not require the setting of complex hydraulic pipelines or the use of motor adjustment, which is more environmentally friendly and energy-saving.

[0020] 4. Each linear drive component uses a cylinder to prevent hydraulic oil from leaking onto the tire and causing waste tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the rear tire inflation device with stepless rim width adjustment.

[0022] Figure 2 For Figure 1 A schematic diagram with some parts hidden on the basis of the original image.

[0023] Figure 3 It is a three-dimensional diagram of the opening and closing mechanism, the floating adjustment mechanism and the third linear drive mechanism.

[0024] Figure 4 This is a schematic diagram of the first clamping component and the second clamping component in a combined state.

[0025] Figure 5 This is a schematic diagram of the first clamping component and the second clamping component in an open state.

[0026] Figure 6 For Figure 5 A schematic diagram showing the second sealing component hidden from view from another direction.

[0027] Figure 7 It is a structural diagram of the opening and closing mechanism and the floating adjustment mechanism.

[0028] Symbols in the accompanying drawings:

[0029] Frame 10, first sealing assembly 11, second sealing assembly 12, controller A.

[0030] First linear drive mechanism 13 , first bracket 130 , first cylinder 131 .

[0031] Pull rod 14, protruding part 140.

[0032] Opening and closing mechanism 15, support base 150, first clamping member 151, first groove 151a, first coupling portion 151b, first clearance groove 151c, second clamping member 152, second clearance groove 152c, second groove 152a, second coupling portion 152b, support frame 153, baffle 153a, transmission rod 153b, connecting plate 153c, baffle rod 153d, linear actuator 154, spring 155, limit switch 156, trigger member 157, proximity switch 158, connecting rod 159.

[0033] Floating adjustment mechanism 16, support plate 160, second bracket 161, pressing plate 161a, stud 162b, second cylinder 162, piston rod 162a.

[0034] The third linear drive mechanism 17 , the mounting plate 170 , and the third cylinder 171 .

[0035] Detection assembly 18 , fixing plate 180 , linear displacement sensor 181 , first connecting plate 182 , guide sleeve 183 , guide rod 184 . DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 7As shown, the tire rear inflation device with stepless rim width adjustment includes a frame 10, a first sealing component 11, a second sealing component 12, a first linear drive mechanism 13, a pull rod 14, an opening and closing mechanism 15, a floating adjustment mechanism 16, a third linear drive mechanism 1, and a controller A. Controller A preferably adopts an industrial computer. The various parts and the relationship between them are described in detail below.

[0038] A first sealing assembly 11 is fixed to the frame 10 and includes a first flange and a first rim. One end of the first flange is fixed to the frame 10, and the other end of the first flange is fixed to the first rim. The first rim is used to mate with and seal the tire. A second sealing assembly 12 is located above the first sealing assembly 11 and includes a second flange and a second rim. The second flange is fixed to the second rim. The second rim is used to mate with and seal the tire.

[0039] The first linear drive mechanism 13 is connected to the controller A, and the first linear drive mechanism 13 is arranged on the frame 10; the first linear drive mechanism 13 includes a first bracket 130, a first cylinder 131, and a first solenoid valve (not shown in the figure), the first bracket 130 is fixed to the frame 10, the first cylinder 131 is installed on the first bracket 130, the first cylinder 131 is fixed to the pull rod 14, the first solenoid valve is connected to the first cylinder 131, and the first solenoid valve is connected to the controller A. As needed, the controller A controls the first solenoid valve to be opened or closed or in the middle position.

[0040] The pull rod 14 is connected to the first linear drive mechanism 13. A protruding part 140 is provided on the circumference of the pull rod 14 to increase the binding force after being clamped by the opening and closing mechanism 15. The protruding part 140 includes a thread, and the thread has multiple sections. In this embodiment, the thread has two sections, and these thread sections are arranged at intervals.

[0041] The opening and closing mechanism 15 is electrically connected to the controller A. Under the control of the controller A, the opening and closing mechanism 15 is opened or closed. The pull rod 14 passes through the opening and closing mechanism 15. Before the pull rod 14 rises or falls, the opening and closing mechanism 15 switches from the engaged state to the open state to release the clamped pull rod 14. After the pull rod 14 rises or falls to the set position, the opening and closing mechanism 15 switches from the open state to the engaged state to clamp the pull rod 14.

[0042] The opening and closing mechanism 15 includes a support seat 150, a first clamping component 151, a second clamping component 152, a support frame 153, and a linear drive 154. The first clamping component 151 and the second clamping component 152 are both matched with the support seat 150. The first clamping component 151 is provided with a first groove 151a that cooperates with the pull rod 14, and the second clamping component 152 is provided with a second groove 152a that cooperates with the pull rod 14. When the first clamping component 151 and the second clamping component 152 are combined, the first groove 151a and the second groove 152a form a through hole, and the support frame 153 and the linear drive 154 are connected. The support seat 150 is fixed, and the linear drive 154 is installed on the support frame 153. The linear drive 154 includes a cylinder and a solenoid valve. The cylinder in the linear drive 154 can also be replaced by a hydraulic cylinder. The solenoid valve in the linear drive 154 is electrically connected to the controller A. The linear drive 154 is connected to the first clamping component 151. When the linear drive 154 drives the first clamping component 151 and the second clamping component 152 to combine, the pull rod 14 is clamped. When the linear drive 154 drives the first clamping component 151 and the second clamping component 152 to separate, the pull rod 14 is released.

[0043] In this embodiment, a first coupling portion 151b for coupling with the pull rod 14 is provided in the first groove 151a, and a second coupling portion 152b for coupling with the pull rod 14 is provided in the second groove 152a. The first coupling portion 151b and the second coupling portion 152b are both threads, and the first coupling portion 151b and the second coupling portion 152b respectively cooperate with the threads on the pull rod 14. For example, when the linear drive 154 drives the first clamping component 151 and the second clamping component 152 to switch from an open state to a coupled state to clamp the pull rod 14, the first coupling portion 151b and the second coupling portion 152b respectively engage with the raised components 140 on the pull rod 14. Through this engagement, when the controller A controls the first solenoid valve to be in a neutral state, the piston rod of the first cylinder 131 has no axial restraining force on the pull rod 14. At this time, an axial restraining force is formed on the pull rod 14 after the pull rod 14 is clamped by the opening and closing mechanism 15.

[0044] The first coupling portion 151b and the second coupling portion 152b are respectively engaged with the threads on the pull rod 14. When the linear drive 154 drives the first clamping component 151 and the second clamping component 152 to switch from the coupled state to the open state to release the clamped pull rod 14, it is necessary to separate the first clamping component 151 and the second clamping component 152 from the pull rod 14. Then, when the pull rod 14 needs to be raised or lowered later, the opening and closing mechanism 15 will not hinder the pull rod 14 in the axial direction. Therefore, in this embodiment, the first clamping component 151 is slidably engaged with the support seat 150, and the second clamping component 152 is slidably engaged with the support seat 150. The support seat 150 is provided with a sliding groove. The first clamping component 151 and the second clamping component 152 are slidably engaged with the sliding groove on the support seat 150. The support frame 153 includes a baffle 153a, transmission rod 153b, connecting plate 153c, the baffle 153a is fixedly connected to the support seat 150, and the baffle 153a and the first clamping part 151 are both provided with a clearance hole, the transmission rod 153b passes through the clearance holes on the baffle 153a and the first clamping part 151 and is gap-matched with the clearance holes, one end of the transmission rod 153b is fixed to the second clamping part 152, and the other end of the transmission rod 153b is fixed to the connecting plate 153c, and the connecting plate 153c is fixed to the linear drive 154; when the first clamping part 151 and the second clamping part 152 are in a combined state, the distance between the first clamping part 151 and the baffle 153a is smaller than the working stroke of the linear drive 154, for example, the distance between the first clamping part 151 and the baffle 153a is one half of the working stroke of the linear drive 154.

[0045] In this embodiment, a blocking rod 153d is further included. One end of the blocking rod 153d is fixed to the floating adjustment mechanism 16. The blocking rod 153d passes through the sliding groove on the support seat 150. The other end of the blocking rod 153d is fixed to the support seat 150. The blocking rod 153d is located between the first clamping member 151 and the second clamping member 152. When the first clamping member 151 and the second clamping member 152 are in a coupled state, the first clamping member 151 and the second clamping member 152 cooperate with the blocking rod 153d. Preferably, the first clamping member 151 is provided with a first clearance groove 151c for cooperating with the blocking rod 153d, and the second clamping member 152 is provided with a second clearance groove 152c for cooperating with the blocking rod 153d. When the first clamping member 151 and the second clamping member 152 are in a coupled state, the blocking rod 153d cooperates with the first clearance groove 151c and the second clearance groove 152c.

[0046] Based on the above, when it is necessary to switch the first clamping member 151 and the second clamping member 152 from the combined state to the open state to release the clamped pull rod 14, the piston rod of the linear actuator 154 retracts and applies a pulling force to the first clamping member 151, so that the first clamping member 151 moves toward the baffle 153a. Since the first clamping member 151 and the second clamping member 152 are in the combined state, the distance between the first clamping member 151 and the baffle 153a is half of the stroke of the linear actuator 154. When the first clamping member 151 and the baffle 153a are in the combined state, the distance between the first clamping member 151 and the baffle 153a is half of the stroke of the linear actuator 154. When the first clamping part 151 and the baffle 153a are in contact with each other, the linear drive 154 continues to work. At this time, since the piston rod of the linear drive 154 cannot continue to retract, it can only force the cylinder of the linear drive 154 to move. The cylinder of the linear drive 154 drives the transmission rod 153b to move linearly, and then the transmission rod 153b drives the second clamping part 152 to move in the opposite direction relative to the first clamping part 151, thereby switching the first clamping part 151 and the second clamping part 152 from the combined state to the open state to release the clamped pull rod 14.

[0047] When it is necessary to switch the first clamping member 151 and the second clamping member 152 from the open state to the combined state to clamp the pull rod 14, the piston rod of the linear actuator 154 extends to apply a thrust to the first clamping member 151, causing the first clamping member 151 to move toward the baffle 153d. Since the first clamping member 151 and the second clamping member 152 are in the combined state, the distance between the first clamping member 151 and the baffle 153a is half of the working stroke of the linear actuator 154. Therefore, when the first clamping member 151 and the baffle 153d hit each other, the linear actuator 154 The working stroke is only half completed. At this time, since the piston rod of the linear driver 154 cannot continue to extend, it can only force the cylinder of the linear driver 154 to move. The cylinder of the linear driver 154 drives the transmission rod 153b to move linearly, and then the transmission rod 153b drives the second clamping part 152 to move toward the first clamping part 151, thereby switching the first clamping part 151 and the second clamping part 152 from the open state to the combined state to clamp the pull rod 14. At this time, the blocking rod 153d cooperates with the groove wall surface of the first makeshift groove 151c and the second makeshift groove 152c.

[0048] The opening and closing mechanism 15 also includes a spring 155, one end of which is against the frame 10, and the other end of the spring 155 is against the support seat 150. The spring 155 is compressed between the frame 10 and the support seat 150. Before the controller A controls the first solenoid valve to be in the neutral state, the elastic force of the spring 155 is transmitted to the first clamping part 151 and the second clamping part 152 through the support seat 150, thereby eliminating the gap between the first coupling part 151b and the second coupling part 152b and the protruding part 140. After the opening and closing mechanism 15 clamps the pull rod 14, the dimensional accuracy of the pull rod 14 in the axial direction is improved.

[0049] The opening and closing mechanism 15 also includes a limit switch 156 and a trigger component 157. The limit switch 156 is fixed to the floating adjustment mechanism 16. The trigger component 157 is used to trigger the limit switch 156 when the first clamping component 151 is opened. The trigger component 157 is fixed to the first clamping component 151, and the limit switch 156 is electrically connected to the controller A.

[0050] The linear drive 154 drives the first clamping component 151 to move, so that the first clamping component 151 and the second clamping component 152 are switched from the combined state to the open state. Since the trigger component 157 is fixed to the first clamping component 151, when the first clamping component 151 moves, the trigger component 157 follows the first clamping component 151 to move. When the trigger component 157 contacts the limit switch 156 and generates pressure on the limit switch 156, the limit switch 156 sends an open signal to the controller A, and the controller A can give a signal to proceed to the next action.

[0051] The opening and closing mechanism 15 also includes a proximity switch 158 and a connecting rod 159. The proximity switch 158 is fixed to the floating adjustment mechanism 16, and the connecting rod 159 is fixed to the first clamping component 151. The proximity switch 158 and the connecting rod 159 cooperate to detect the position of the first clamping component 151 switching from the open state to the closed state.

[0052] When the linear drive 154 drives the first clamping part 151 to move, so that the first clamping part 151 and the second clamping part 152 switch from an open state to a combined state, the connecting rod 159 moves with the first clamping part 151, and the proximity switch 158 feeds back the signal of the physical changes (such as magnetic field, capacitance change, etc.) generated when the connecting rod 159 approaches to the controller A. The controller A determines whether the first clamping part 151 and the second clamping part 152 are combined in place based on the signal provided by the proximity switch 158.

[0053] The floating adjustment mechanism 16 is used to drive the opening and closing mechanism 15 to rise or fall. The floating adjustment mechanism 16 supports the opening and closing mechanism 15. The third linear drive mechanism 16 is fixed to the frame 10. The floating adjustment mechanism 16 is electrically connected to the controller A.

[0054] The floating adjustment mechanism 16 includes a support plate 160, a second bracket 161, and a second cylinder 162. The support plate 160 supports the opening and closing mechanism 15. The support seat 150 cooperates with the support plate 160. The second bracket 161 passes through the support plate 160 and fastens the support plate 160 and the opening and closing mechanism 15 into one. The second bracket 161 includes a pressure plate 161a and a stud 162b. One end of the stud 162b is fixed to the pressure plate 162a, and the other end of the stud 162b passes through the support plate 160 and is fastened to the support seat 150. The proximity switch 158 is fixed to the support plate 160.

[0055] The second cylinder 162 is used to drive the opening and closing mechanism 15 to rise or fall. The second cylinder 162 is used to adjust the rim width. The cylinder body of the second cylinder 162 cooperates with the second bracket 161. The piston rod 162a of the second cylinder 162 passes through the support plate 160 and the opening and closing mechanism 15 and is fixed to the frame 10. The second cylinder 162 is connected to a solenoid valve, which is electrically connected to the controller A. The piston rod 162a in the second cylinder 162 is loosely matched with the through-holes provided in the support plate 160 and the opening and closing mechanism 15. When the second cylinder 162 is in operation, the cylinder body of the second cylinder 162 rises or falls, thereby driving the opening and closing mechanism 15 to rise or fall.

[0056] The third linear drive mechanism 17 drives the second sealing assembly 12 to engage with the tire. The third linear drive mechanism 17 is connected to the tie rod 14 and the second sealing assembly 12. The floating adjustment mechanism 16 is electrically connected to the controller A. In this embodiment, the third linear drive mechanism 17 includes a mounting plate 170 and a third cylinder 171. The mounting plate 170 is fixed to the tie rod 14. The third cylinder 171 drives the second sealing assembly 12 to engage with the tire. The third cylinder 171 is fixed to the mounting plate 170 and connected to the second sealing assembly 12. The third cylinder 171 includes a cylinder body and a third solenoid valve. The third solenoid valve is connected to the cylinder body and the third solenoid valve is connected to the controller A. The piston rod of the cylinder body is provided with a limit member.

[0057] This embodiment further includes a detection assembly 18 for detecting the extent of the rise or fall of the second sealing assembly 12. Detection assembly 18 includes a fixed plate 180 and a linear displacement sensor 181. Fixed plate 180 is fixed to second sealing assembly 12, and linear displacement sensor 181 is connected to fixed plate 180. Linear displacement sensor 181 is connected to controller A and detects the extent of the rise or fall of second sealing assembly 12 and feeds the detection result back to controller A.

[0058] This embodiment also includes a guiding mechanism, which includes a first connecting plate 182, a guide sleeve 183 fixed to the first connecting plate 182, and a guide rod 184. The first connecting plate 182 is fixed to the frame 10 or the first linear drive mechanism 13. A through hole is provided on the first connecting plate 182. The guide sleeve 183 cooperates with the through hole on the first connecting plate 182. The guide rod 184 passes through the guide sleeve 183 and slides with the guide sleeve 183. The guide rod 184 is fixed to the fixed plate 180. When the second sealing assembly 12 rises or falls, the guide rod 184 guides the second sealing assembly 12.

[0059] The parameters of the vulcanized tire are input into the controller A, and the working process of the device of the present invention to inflate the tire is as follows:

[0060] S1, matching the vulcanized tire with the first sealing assembly 11, and forming a seal on one end of the tire through the first rim in the first sealing assembly 11.

[0061] In step S2, controller A activates linear actuator 154, which drives first clamping member 151 and second clamping member 152 from a coupled state to an open state, releasing pull rod 14. When trigger member 157 contacts and exerts pressure on limit switch 156, limit switch 156 sends a fully open signal to controller A, allowing controller A to initiate the next action.

[0062] S3, controller A controls the first linear drive mechanism 13 to work, the first linear drive mechanism 13 drives the pull rod 14 to descend, and the second sealing component 12 follows the pull rod 14 to descend. During the descent of the second sealing component 12, the linear displacement sensor 18 detects the descent size of the second sealing component 12. When the descent size of the second sealing component 12 reaches the set requirement of controller A, controller A controls the first linear drive mechanism 13 to stop working. At this time, the second sealing component 12 is located above the tire, that is, the second sealing component 12 is not in contact with the tire.

[0063] S4, controller A controls the linear actuator 154 to operate, and the linear actuator 154 drives the first clamping member 151 and the second clamping member 152 to switch from the open state to the engaged state to clamp the pull rod 14. The proximity switch 158 feeds back the signal of the physical change generated by the approach of the connecting rod 159 to the controller A. Controller A determines that the first clamping member 151 and the second clamping member 152 are engaged in place based on the signal provided by the proximity switch 158. Only then does controller A give the signal for the next action. Because the pull rod 14 is clamped by the opening and closing mechanism 15, even if an axial force is directly applied to the pull rod 14, the pull rod 14 cannot rise or fall along the height direction of the frame 10.

[0064] S5, controller A controls the first solenoid valve in the first linear drive mechanism 13 to be in a neutral state. At this time, the piston rod of the first cylinder 131 has no axial constraint on the pull rod 14, and the clamping of the pull rod 14 by the opening and closing mechanism 15 overcomes the gravity of the pull rod 14 and the second sealing assembly 12.

[0065] At step S6, controller A activates second cylinder 162 based on the user's input of tire model and size. Second cylinder 162 drives opening and closing mechanism 15 to rise or fall along the height of frame 10. Because pull rod 14 is clamped by opening and closing mechanism 15 and the first solenoid valve in first linear drive mechanism 13 is in neutral, pull rod 14 follows the rise or fall of opening and closing mechanism 15. Pull rod 14 also drives the second sealing assembly 12 and the piston rod of first cylinder 131 to rise or fall. Because the position of first sealing assembly 11 is fixed, the width of the wheel rim is adjusted when second sealing assembly 12 rises or falls.

[0066] S7, when the pull rod 14 rises or falls to make the second sealing assembly 12 reach the required position, the controller A controls the second cylinder 162 to stop working, and the position adjustment of the second sealing assembly 12 is ended at this time. The controller A controls the third linear drive mechanism 17 to work, and the third cylinder 171 drives the second sealing assembly 12 to combine with the tire to form a seal on the other end of the tire.

[0067] S8, controller A controls the third solenoid valve in the third linear drive mechanism 17 to be in the middle position, so that the cylinder body in the third cylinder in the third linear drive mechanism 17 is in a free state, and then the tire is inflated. As the internal air pressure of the tire increases, the tire expands, and the expanded tire pushes back the second sealing component 12. The second sealing component 12 pushes the piston rod of the third cylinder 171 to move. When the limiting component on the piston rod hits the mounting plate 170, the piston rod cannot be pushed further to move. The limiting component protects the third cylinder 171 to avoid damage to the third cylinder 171.

Claims

1. A tire rear inflation device with stepless rim width adjustment, comprising a frame (10), a first sealing assembly (11) fixed to the frame (10), a second sealing assembly (12) located above the first sealing assembly (11), and a controller (A), characterized in that: It also includes: a first linear drive mechanism (13) electrically connected to the controller (A), and the first linear drive mechanism (13) is arranged on the frame (10); A pull rod (14), the pull rod (14) is connected to the first linear drive mechanism (13); An opening and closing mechanism (15) is electrically connected to the controller (A), the pull rod (14) passes through the opening and closing mechanism (15), and before the pull rod (14) is raised or lowered, the opening and closing mechanism (15) switches from a combined state to an open state to release the clamped pull rod (14), and after the pull rod (14) is raised or lowered to a set position, the opening and closing mechanism (15) switches from an open state to a combined state to clamp the pull rod (14); a floating adjustment mechanism (16) for driving the opening and closing mechanism (15) to rise or fall, the floating adjustment mechanism (16) supporting the opening and closing mechanism (15), the third linear drive mechanism (16) being fixed to the frame (10), and the floating adjustment mechanism (16) being electrically connected to the controller (A); A third linear drive mechanism (17) drives the second sealing assembly (12) to cooperate with the tire, the third linear drive mechanism (17) is connected to the pull rod (14), the third linear drive mechanism (17) is connected to the second sealing assembly (12), and the floating adjustment mechanism (16) is electrically connected to the controller (A).

2. The tire rear inflation device with stepless rim width adjustment according to claim 1, characterized in that: The first linear drive mechanism (13) includes a first bracket (130), a first cylinder (131), and a first solenoid valve. The first bracket (130) is fixed to the frame (10), the first cylinder (131) is installed on the first bracket (130), the first cylinder (131) is fixed to the pull rod (14), and the first solenoid valve is connected to the first cylinder (131).

3. The tire rear inflation device with stepless rim width adjustment according to claim 1, characterized in that: A protruding component (140) is provided on the circumferential surface of the pull rod (14) for increasing the binding force after being clamped by the opening and closing mechanism (15).

4. The tire rear inflation device with stepless rim width adjustment according to claim 1, characterized in that: The opening and closing mechanism (15) includes a support seat (150), a first clamping component (151), a second clamping component (152), a support frame (153), and a linear drive (154). The first clamping component (151) and the second clamping component (152) are both matched with the support seat (150). The first clamping component (151) is provided with a first groove (151a) matched with the pull rod (14). The second clamping component (152) is provided with a second groove (151b) matched with the pull rod (14). 2a), the support frame (153) is fixed to the support seat (150), the linear drive (154) is installed on the support frame (153), the linear drive (154) is connected to the first clamping component (151), the linear drive (154) drives the first clamping component (151) and the second clamping component (152) to clamp the pull rod (14) when the linear drive (154) drives the first clamping component (151) and the second clamping component (152) to separate to release the pull rod (14).

5. The tire rear inflation device with stepless rim width adjustment according to claim 4, characterized in that: A first combining portion (151b) for combining with the pull rod (14) is provided in the first groove (151a), and a second combining portion (152b) for combining with the pull rod (14) is provided in the second groove (152a).

6. The tire rear inflation device with stepless rim width adjustment according to claim 5, characterized in that: The first clamping component (151) is in sliding engagement with the support seat (150), and the second clamping component (152) is in sliding engagement with the support seat (150); The support frame (153) comprises a baffle (153a), a transmission rod (153b), and a connecting plate (153c); the baffle (153a) is fixedly connected to the support seat (150); the baffle (153a) and the first clamping component (151) are both provided with clearance holes; the transmission rod (153b) passes through the clearance holes on the baffle (153a) and the first clamping component (151) and is clearance-matched with the clearance holes; one end of the transmission rod (153b) is fixed to the second clamping component (152); the other end of the transmission rod (153b) is fixed to the connecting plate (153c); and the connecting plate (153c) is fixed to the linear driver (154); When the first clamping component (151) and the second clamping component (152) are in a combined state, the distance between the first clamping component (151) and the baffle (153a) is smaller than the working stroke of the linear drive (154).

7. The tire rear inflation device with stepless rim width adjustment according to claim 6, characterized in that: The opening and closing mechanism (15) further comprises a blocking rod (153d), one end of which is fixed to the floating adjustment mechanism (16), and the blocking rod (153d) is located between the first clamping component (151) and the second clamping component (152). When the first clamping component (151) and the second clamping component (152) are in a combined state, the blocking rod (153d) cooperates with the first clamping component (151) and the second clamping component (152).

8. The tire rear inflation device with stepless rim width adjustment according to claim 5, characterized in that: The opening and closing mechanism (15) further comprises a spring (155), one end of the spring (155) abuts against the frame (10), and the other end of the spring (155) abuts against the support seat (150).

9. The tire rear inflation device with stepless rim width adjustment according to claim 5, characterized in that: The opening and closing mechanism (15) further includes a limit switch (156), and the limit switch (156) is fixed to the floating adjustment mechanism (16); A triggering component (157) is used to trigger the limit switch (156) when the first clamping component (151) is opened, and the triggering component (157) is fixed to the first clamping component (151). A proximity switch (158), the proximity switch (158) being fixed to the floating adjustment mechanism (16); A connecting rod (159) is fixed to the first clamping component (151), and a proximity switch (158) cooperates with the connecting rod (159) to detect the position of the first clamping component (151) and the second clamping component (152) when they are in a combined state.

10. The tire rear inflation device with stepless rim width adjustment according to claim 1, characterized in that: The floating adjustment mechanism (16) includes: a support plate (160), the support plate (160) supports the opening and closing mechanism (15); a second bracket (161), the second bracket (161) passing through the support plate (160) and fastening the support plate (160) and the opening and closing mechanism (15) into one body; A second cylinder (162) is used to adjust the rim width. The cylinder body of the second cylinder (162) cooperates with the second bracket (161). The piston rod of the second cylinder (162) passes through the support plate (160) and the opening and closing mechanism (15) and is fixed to the frame (10).

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