Tire uniformity testing machine with upper rim shaft locking function

Abstract

The invention provides a tire uniformity testing machine with an upper rim shaft locking function, the tire uniformity testing machine comprises an upper rim, a lower rim, an upper rim shaft, a main shaft, a locking mechanism and a position monitoring mechanism, the locking mechanism comprises a steel ball seat, a steel ball, a cylinder assembly and a piston assembly, and the position monitoring mechanism comprises a guide rod assembly and a position monitor. The upper rim shaft is locked through the locking mechanism, meanwhile, the moving position of the piston in the locking mechanism is monitored through the position monitoring mechanism, and therefore whether the piston moves in place or not is judged, and whether the locking mechanism is locked or not is judged. And by arranging the locking mechanism and the position monitoring mechanism, the locking alignment precision can be improved, and the safety of locking the upper rim shaft in place is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tire testing, and in particular relates to a tire uniformity testing machine with an upper rim shaft locking function. Background Art

[0002] The tire uniformity tester is a special equipment for fully automatic online detection of tire uniformity performance indicators. During the tire test, the tire needs to be clamped and locked through the upper and lower rims, and the tire is inflated. After reaching the pressure required for the test, the servo motor drives the load wheel pair to be clamped on the main shaft, and the inflated tire is loaded to simulate the state of the tire driving on the road. The main shaft drives the tire to rotate, and the force sensor fixed on the mobile frame collects the fluctuation of the tire's force during one rotation, so as to perform the tire uniformity test.

[0003] In the prior art, a tire uniformity tester sets a slot on the upper rim shaft and uses a block mechanism located on the outside of the upper rim shaft for locking. The block mechanism is driven by a driving device. Since the traditional tire uniformity tester cannot accurately understand the position information of the block mechanism, it is impossible to accurately judge the locking and unlocking status of the upper rim shaft, and there is a potential safety risk caused by inadequate locking.

[0004] Therefore, how to overcome the above technical defects is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a tire uniformity tester with an upper rim shaft locking function, which can improve the locking alignment accuracy and effectively improve the safety of locking the upper rim shaft in place.

[0006] In order to solve the above technical problems, the present invention provides a tire uniformity tester with an upper rim shaft locking function, comprising an upper rim, a lower rim, an upper rim shaft, a main shaft, a locking mechanism and a position monitoring mechanism, wherein the locking mechanism comprises a steel ball seat, a steel ball, a cylinder assembly and a piston assembly, and the position monitoring mechanism comprises a guide rod assembly and a position monitor;

[0007] The upper rim and the lower rim are used to clamp the tire to be tested, the upper rim shaft is connected to the upper rim and passes through the hollow cavity of the steel ball seat and the main shaft, the upper end of the steel ball seat is provided with a plurality of mounting holes for mounting steel balls, and the upper rim shaft is provided with a plurality of first slots corresponding to the mounting holes;

[0008] The lower wheel rim is fixedly connected to the steel ball seat, the cylinder assembly is covered on the outer side of the steel ball seat, a sealed sliding cavity is formed between the cylinder assembly and the steel ball seat, the piston assembly is slidably arranged in the sealed sliding cavity, and the piston assembly is provided with a plurality of second slots corresponding to the mounting holes;

[0009] The spindle and the steel ball seat are provided with an avoidance groove for the axial movement of the guide rod assembly, the inner end of the guide rod assembly extends into the avoidance groove and is connected to the piston assembly, and the outer end is located outside the spindle, and the position monitor is used to monitor whether the outer end of the guide rod assembly moves into position;

[0010] The main shaft and the steel ball seat are provided with a main shaft locking air path for inflating air into the sealing sliding cavity.

[0011] Optionally, in the above-mentioned tire uniformity testing machine, when the main shaft locking air circuit inflates the sealed sliding chamber, the piston assembly is pushed upward to the top, and the piston assembly pushes the steel ball of the steel ball seat to partially embed the steel ball into the first groove corresponding to the upper rim shaft, thereby realizing the locking of the upper rim shaft by the locking mechanism. At this time, the position monitor monitors whether the guide rod assembly moves into place; when the main shaft is released and the air circuit is ventilated, the steel ball of the steel ball seat is partially embedded in the second groove of the piston assembly, and the locking mechanism and the upper rim shaft are not locked.

[0012] Optionally, in the above-mentioned tire uniformity testing machine, the guide rod assembly includes a first guide rod and a second guide rod, one end of the first guide rod extends into the avoidance groove and the other end is located on the outside of the main shaft, one end of the second guide rod is connected to one end of the first guide rod, and the other end passes through the main shaft and the steel ball seat and is connected to the piston assembly, and the position monitor is used to monitor whether the other end of the first guide rod moves into place.

[0013] Optionally, in the above tire uniformity testing machine, the first guide rods are arranged in parallel, and / or the guide rod assemblies include at least three groups, and all the guide rod assemblies are monitored by the position monitor.

[0014] Optionally, in the above-mentioned tire uniformity testing machine, the position monitor includes a signal ring and a proximity switch, the signal ring is arranged at the outer end of the guide rod assembly, and the proximity switch is fixedly arranged relative to the main shaft.

[0015] Optionally, in the above-mentioned tire uniformity testing machine, the cylinder assembly includes a cylinder body, an outer guide sleeve and a pressure cover which are connected in sequence, the cylinder body and the outer guide sleeve cover are arranged on the outside of the piston assembly and form a cylindrical structure, and the pressure cover is arranged at the end of the cylindrical structure.

[0016] Optionally, in the above-mentioned tire uniformity testing machine, a sealing ring is provided between the pressure cover and the steel ball seat, and / or between the outer guide sleeve and the piston assembly, and / or between the cylinder body and the piston assembly, and / or between the outer guide sleeve and the cylinder body, and / or between the cylinder body and the steel ball seat.

[0017] Optionally, in the above-mentioned tire uniformity tester, the piston assembly includes a drive sleeve and a piston connected from top to bottom, the second slot is arranged on the drive sleeve, and the end of the guide rod assembly is connected to the piston.

[0018] Optionally, in the above tire uniformity testing machine, the upper rim and the upper rim shaft are connected via an upper rim adapter flange.

[0019] Optionally, in the above-mentioned tire uniformity testing machine, the steel ball seat is an inverted T-shaped structure and the outer diameter of the upper end is smaller than the outer diameter of the lower end, and the lower rim is arranged on the upper surface of the lower end of the steel ball seat.

[0020] Optionally, in the above-mentioned tire uniformity testing machine, a tire inflation air path for inflating the tire is provided on the steel ball seat and the main shaft.

[0021] Optionally, in the above tire uniformity testing machine, when the piston assembly is located at the top of the sealed sliding chamber, the first groove and the second groove are alternately arranged.

[0022] The present invention provides a tire uniformity tester with an upper rim shaft locking function, which has the following beneficial effects:

[0023] The steel ball seat, the piston assembly and the cylinder assembly are sequentially sleeved on the outer side of the upper rim shaft, and a sealed sliding cavity is formed between the steel ball seat and the cylinder assembly for the piston assembly to reciprocate in the height direction. The movement of the piston assembly in the sealed sliding cavity can be controlled by inflating or deflating the sealed sliding cavity through the main shaft locking air path. The movement of the piston assembly can control the horizontal movement of the steel ball on the steel ball seat. When the piston assembly moves to the top of the sealed sliding cavity, the side wall of the piston assembly without the second groove abuts against the steel ball on the steel ball seat, which can push the steel ball to move in the direction close to the upper rim shaft, and the steel ball can be embedded in the first groove of the upper rim shaft, thereby realizing the locking of the upper rim shaft and the steel ball seat.

[0024] At the same time, the inner end of the guide rod assembly is connected to the piston assembly. When the piston assembly moves, it can drive the guide rod assembly to move axially, and the position of the outer end of the guide rod assembly is monitored by the position monitor to see whether it has moved into place.

[0025] The locking mechanism is used to lock the upper rim shaft, and the position monitoring mechanism is used to monitor the moving position of the piston in the locking mechanism, so as to judge whether the piston is moved into place, and then judge whether the locking mechanism is locked. By setting the locking mechanism and the position monitoring mechanism, the locking alignment accuracy can be improved, and the safety of locking the upper rim shaft in place can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a tire uniformity testing machine with an upper rim shaft locking function provided by an embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of a tire uniformity testing machine with an upper rim shaft locking function provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a position monitoring mechanism provided by an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the structure of an upper rim shaft provided by an embodiment of the present invention;

[0031] Figure 5 A schematic structural diagram of a piston mechanism provided in an embodiment of the present invention.

[0032] In the above picture:

[0033] A-spindle locking air circuit;

[0034] B-tire inflation circuit;

[0035] 110 - upper rim shaft; 111 - first slot; 120 - upper rim adapter flange; 130 - upper rim;

[0036] 200-Tire;

[0037] 300 - lower rim;

[0038] 400-spindle;

[0039] 510-Steel ball seat; 520-Steel ball;

[0040] 610-cylinder; 620-outer guide sleeve; 630-pressure cover; 640-piston; 650-driving sleeve; 651-second slot;

[0041] 710 - second guide rod; 720 - first guide rod; 730 - signal ring; 740 - proximity switch. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] The core of the invention is to provide a tire uniformity tester with an upper rim shaft locking function, which can improve the locking alignment accuracy and effectively improve the safety of locking the upper rim shaft in place.

[0044] In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Specifically, please refer to Figure 1-Figure 5 The present invention provides a tire uniformity tester with an upper rim shaft locking function, comprising an upper rim 130, a lower rim 300, an upper rim shaft 110, a main shaft 400, a locking mechanism and a position monitoring mechanism.

[0046] The locking mechanism is used to lock and unlock the upper rim shaft 110, and mainly includes a steel ball seat 510, a steel ball 520, a cylinder assembly and a piston assembly. The position monitoring mechanism is used to monitor the moving position of the piston 640 in the locking mechanism, and the position monitoring mechanism includes a guide rod assembly and a position monitor. Further, the guide rod assembly includes a first guide rod 720 and a second guide rod 710; the position monitor includes a signal ring 730 and a proximity switch 740.

[0047] A clamping position for clamping and fixing the tire 200 to be tested is formed between the upper rim 130 and the lower rim 300 , and can support the upper and lower side surfaces of the tire 200 to be tested.

[0048] The upper rim shaft 110 is a T-shaped structure and the outer diameter of the upper end is larger than the outer diameter of the lower end. One end of the upper rim shaft 110 (i.e., the bottom surface of the upper end) is connected to the upper end surface of the upper rim 130 by bolts. The other end of the upper rim shaft 110 passes through the upper rim 130 and the steel ball seat 510 of the locking mechanism in sequence, and is inserted into the hollow cavity of the main shaft 400. The upper rim shaft 110 and the main shaft 400 are clearance-fitted.

[0049] Of course, the other end of the upper rim shaft 110 and the steel ball seat 510 of the locking mechanism are also clearance-matched, and the two can move relatively in the unlocked state.

[0050] The steel ball seat 510 has a hollow cavity that runs through both ends and is used to insert the upper rim shaft 110. The bottom surface of the lower end of the steel ball seat 510 is in contact with the upper end surface of the main shaft 400. The upper end of the steel ball seat 510 is provided with a plurality of mounting holes for mounting the steel balls 520 at intervals along the height direction. The steel balls 520 can move to the left and right sides in the mounting holes under the action of external force.

[0051] A plurality of first grooves 111 are provided on the side wall surface at the other end of the upper rim shaft 110 at intervals along the axial direction. The lower rim 300 is fixedly connected to the steel ball seat 510. The cylinder assembly cover is arranged on the outer side of the upper end of the steel ball seat 510. A sealed sliding cavity is formed between the cylinder assembly and the upper end of the steel ball seat 510. The piston assembly is slidably arranged in the sealed sliding cavity. The piston assembly is provided with a plurality of second grooves 651 at intervals on a side wall close to the steel ball seat 510.

[0052] An avoidance groove is opened on the main shaft 400, one end of the first guide rod 720 extends into the avoidance groove and the other end is located on the outside of the main shaft 400, one end of the second guide rod 710 is connected to one end of the first guide rod 720, and the other end passes through the main shaft 400 and the steel ball seat 510 and is connected to the piston assembly, the signal ring 730 is arranged at the other end of the first guide rod 720, and the proximity switch 740 is fixedly arranged relative to the main shaft 400.

[0053] Of course, in order to improve the accuracy of monitoring, the number of guide rod assemblies is multiple, and at least three sets of first guide rods 720 and second guide rods 710 can be provided for connecting with the external signal ring. The number and position of the signal ring 730, the proximity switch 740, the first guide rod 720 and the second guide rod 710 are all one-to-one corresponding.

[0054] The position switch formed by the proximity switch 740 and the signal ring 730 can be regarded as a whole. The two do not need to have direct mechanical contact. When the signal ring 730 approaches the sensing area of ​​the proximity switch 740, the proximity switch 740 can issue electrical instructions without contact, pressure, or sparks, and accurately reflect the position and stroke of the motion mechanism, thereby realizing the position monitoring function.

[0055] A main shaft locking gas path A for inflating the sealed sliding cavity is provided on the main shaft 400 and the steel ball seat 510, and gas is introduced into the main shaft locking gas path A through an external device.

[0056] Among them, the ball seat 510, the cylinder assembly, the main shaft 400 and the lower rim 300 are fixedly connected and belong to relatively fixed parts in the tire uniformity tester, while the piston assembly is a relatively movable part. The upper rim shaft 110 is relatively fixed to the main shaft 400 when the locking mechanism is locked, and the upper rim shaft 110 can move relative to the main shaft 400 when the locking mechanism is unlocked.

[0057] When the main shaft locking air path A inflates the sealed sliding chamber, the piston assembly is pushed upward to the top, and the piston assembly pushes the steel ball 520 of the steel ball seat 510 to partially embed the steel ball into the first slot 111 corresponding to the upper rim shaft 110, thereby realizing the locking of the upper rim shaft 110 by the locking mechanism. At this time, the second guide rod 710 drives the first guide rod 720 and the signal ring 730 to move to the first position, and the proximity switch 740 is used to determine whether the signal ring 730 has moved into place. It should be noted that when the locking position designed for the tire uniformity tester is consistent with the first position, it can be determined that the signal ring 730 has moved into place, that is, the piston assembly has moved into place. When the locking position designed for the tire uniformity tester is inconsistent with the first position, it can be determined that the signal ring 730 has not moved into place, that is, the piston assembly has not moved into place, and the tire uniformity tester needs to be tested. The internal situation of the tire uniformity tester is checked; when the main shaft is loosened and the air circuit is ventilated, the steel ball 520 of the steel ball seat 510 is partially embedded in the second groove 651 of the piston assembly, and the locking mechanism and the upper rim shaft 110 are not locked (i.e., they are in an unlocked state). At this time, the second guide rod 710 drives the first guide rod 720 and the signal ring 730 to move downward to the second position, and the proximity switch 740 is used to determine whether the signal ring 730 has moved into place. It should be noted that when the locking position designed for the tire uniformity tester is consistent with the second position, it can be determined that the signal ring 730 has moved into place, i.e., the piston assembly has moved into place. When the locking position designed for the tire uniformity tester is inconsistent with the second position, it can be determined that the signal ring 730 has not moved into place, i.e., the piston assembly has not moved into place, and the internal situation of the tire uniformity tester needs to be checked.

[0058] It should be noted that, through the mechanical linkage mechanism formed by the position detection mechanism, the first guide rod 720 and the second guide rod 710 serve as the piston 640 detection guide rods, which can lead out the signal ring 730 on the outside of the main shaft 400, and convert the action state of the piston assembly to the external signal ring 730. The position of the signal ring 730 is detected by the proximity switch 740, and the locking and releasing positions of the piston assembly and the steel ball 520 of the steel ball seat 510 are indirectly detected.

[0059] The tire uniformity tester with the upper rim shaft locking function provided by the present invention uses a locking mechanism to achieve the locking of the upper rim shaft 110, and uses a position monitoring mechanism to monitor the moving position of the piston 640 in the locking mechanism, thereby judging whether the piston 640 has moved into place, and further judging whether the locking mechanism is locked. By providing a locking mechanism and a position monitoring mechanism, the locking alignment accuracy can be improved, and the safety of the upper rim shaft 110 being locked in place can be effectively improved.

[0060] In a specific embodiment, the cylinder assembly includes a cylinder 610, an outer guide sleeve 620 and a gland 630 connected in sequence, the cylinder 610 and the outer guide sleeve 620 are arranged on the outside of the piston assembly to form a cylindrical structure, and the gland 630 is arranged at the end of the cylindrical structure. A sealed sliding cavity for the piston assembly to slide can be formed between the cylinder 610, the outer guide sleeve 620, the gland 630 and the upper end of the ball seat 510.

[0061] In order to further improve the sealing performance of the contact surface connection between the components, a sealing ring is provided between the gland 630 and the steel ball seat 510, and / or between the outer guide sleeve 620 and the piston assembly, and / or between the cylinder 610 and the piston assembly, and / or between the outer guide sleeve 620 and the cylinder 610, and / or between the cylinder 610 and the steel ball seat 510. The cross section of the sealing ring can be set to any shape.

[0062] Specifically, a mounting groove may be provided on the contact surface of each component, and the sealing ring is provided in the mounting groove.

[0063] In a specific embodiment, the piston assembly includes a driving sleeve 650 and a piston 640 connected from top to bottom, a second clamping groove 651 is provided on the driving sleeve 650, and an end of the second guide rod 710 is connected to the piston 640. In particular, the piston 640 and the sealing sliding chamber have the same radial size, so as to realize free movement in the height direction in the inflated state.

[0064] In order to arrange various components reasonably, the upper rim 130 and the upper rim shaft 110 are connected via an upper rim adapter flange 120 .

[0065] In a specific embodiment, the steel ball seat 510 is an inverted T-shaped structure and the outer diameter of the upper end is smaller than the outer diameter of the lower end. The lower rim 300 is arranged on the upper surface of the lower end of the steel ball seat 510, and the cylinder assembly cover is arranged on the outer side of the upper end of the steel ball seat 510.

[0066] Furthermore, the present invention can also improve the structure of the steel ball seat 510, so that the steel ball seat 510 and the lower rim seat 300 are combined into one part, and improve the structure of the spindle 400 device, so that the spindle 400 and the steel ball seat 510 are combined into one part. Such a configuration can reduce the force on the fixing bolt of the steel ball seat 510.

[0067] In addition, a tire inflation air path B for inflating the tire 200 is provided on the steel ball seat 510 and the main shaft 400, and the tire 200 is inflated through the tire inflation air path B. The main shaft locking air path A is connected to the space below the piston assembly where the sealed sliding chamber is located, and the piston assembly can be driven to move upward in the inflated state. Of course, a main shaft 400 loosening air path for inflating the space above the piston assembly where the sealed sliding chamber is located can also be provided on the cylinder body, the steel ball seat 510 and the main shaft 400, and the piston assembly can be driven to move downward in the inflated state.

[0068] In a specific embodiment, the locking principle of the upper rim shaft 110 is as follows: the upper rim shaft 110 is placed in the spindle 400, and is inflated through the spindle locking air path A. When the piston assembly moves upward, the steel ball 520 in the second groove 651 of the piston assembly passes through the mounting hole of the steel ball seat 510 and cooperates with the first groove 111 of the upper rim shaft 110. After the piston assembly moves to the locking position, the piston assembly presses against the steel ball 520 on the side wall surface where the second groove 651 is not provided, thereby locking the upper rim shaft 110 and the spindle 400. The steel ball 520 and the steel ball 520 sleeve cooperate to lock the upper rim shaft 110, thereby completing the locking of the tire 200.

[0069] When the piston assembly is located at the top of the sealed sliding cavity, the first clamping groove 111 and the second clamping groove 651 are arranged alternately, so that the side wall surface of the piston assembly can push the steel ball 520 in the steel ball seat 510 to partially embed into the first clamping groove 111 of the upper rim shaft 110. When the piston assembly moves downward from the top of the sealed sliding cavity, the steel ball 520 in the steel ball seat 510 can enter the second clamping groove 651 of the piston assembly, thereby realizing the unlocking of the upper rim shaft 110 and the main shaft 400.

[0070] In order to further improve the monitoring accuracy of the position monitoring mechanism, the second guide rod 710 is vertically arranged and the first guide rod 720 is parallelly arranged, so as to facilitate the first guide rod 720 to move up and down in the height direction.

[0071] In a specific embodiment, Figure 1 The upper rim shaft 110 and the main shaft 400 are shown in a locked state. The upper rim shaft 110 is locked by the steel ball 520, the upper rim 130 and the lower rim 300 lock the tire 200, the main shaft 400 inflates the tire 200 through the tire 200 inflation air path B, and inflates the sealed sliding cavity through the main shaft locking air path A.

[0072] The piston 640 and the driving sleeve 650 are pushed to a locked state in the sealed sliding cavity of the cylinder assembly, and the driving sleeve 650 pushes the steel ball 520 to a locked position through the mounting hole of the steel ball seat 510, and the steel ball 520 is pushed into the first clamping groove 111 of the upper rim shaft 110 to achieve locking of the upper rim shaft 110. At the same time, a second guide rod 710 is installed on the piston 640, and the second guide rod 710 is connected to the first guide rod 720 and leads out the main shaft 400. The signal ring 730 is installed at the lead-out end of the first guide rod 720, and the moving state of the piston 640 can be transmitted to the signal ring 730, and the internal locking information is synchronized. The proximity switch 740 detects the position of the signal ring 730, and indirectly detects the locking position of the piston 640 and the steel ball 520.

[0073] like Figure 2The upper rim shaft 110 and the main shaft 400 are shown in an unlocked state, the tire inflation air path B stops inflating, the main shaft locking air path A stops inflating, and the main shaft 400 releases the air path for inflation.

[0074] The driving sleeve 650 and the piston 640 are pushed to the unlocked state in the sealed sliding cavity in the cylinder assembly, and the steel ball 520 moves into the second slot 651 on the driving sleeve 650 through the mounting hole of the steel ball seat 510. The steel ball 520 no longer locks the upper rim shaft 110, and the upper rim shaft 110 can rise, and the tire 200 is released for the next step of detection.

[0075] At the same time, the action state of the piston assembly is transferred to the external signal ring 730 through the position monitoring mechanism, and the position of the signal ring 730 is detected by the proximity switch 740, thereby indirectly detecting the release position of the piston assembly.

[0076] The first card slot 111 and the second card slot 651 can be semicircular, trapezoidal or other shapes, which can be adaptively selected according to actual needs.

[0077] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0078] In the description of this application, the meaning of "plurality" is more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0079] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0080] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0081] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0082] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tire uniformity tester with upper rim shaft locking function, characterized in that: It includes an upper rim, a lower rim, an upper rim shaft, a main shaft, a locking mechanism and a position monitoring mechanism, wherein the locking mechanism includes a steel ball seat, a steel ball, a cylinder assembly and a piston assembly, and the position monitoring mechanism includes a guide rod assembly and a position monitor; The upper rim and the lower rim are used to clamp the tire to be tested, the upper rim shaft is connected to the upper rim and passes through the hollow cavity of the steel ball seat and the main shaft, the upper end of the steel ball seat is provided with a plurality of mounting holes for mounting steel balls, and the upper rim shaft is provided with a plurality of first slots corresponding to the mounting holes; The lower wheel rim is fixedly connected to the steel ball seat, the cylinder assembly is covered on the outer side of the steel ball seat, a sealed sliding cavity is formed between the cylinder assembly and the steel ball seat, the piston assembly is slidably arranged in the sealed sliding cavity, and the piston assembly is provided with a plurality of second slots corresponding to the mounting holes; The spindle and the steel ball seat are provided with an avoidance groove for the axial movement of the guide rod assembly, the inner end of the guide rod assembly extends into the avoidance groove and is connected to the piston assembly, and the outer end is located outside the spindle, and the position monitor is used to monitor whether the outer end of the guide rod assembly moves into position; The main shaft and the steel ball seat are provided with a main shaft locking air path for inflating air into the sealing sliding cavity.

2. The tire uniformity testing machine according to claim 1, characterized in that: When the main shaft locking air circuit inflates the sealed sliding chamber, the piston assembly is pushed upward to the top, and the piston assembly pushes the steel ball of the steel ball seat to partially embed the steel ball into the first groove corresponding to the upper rim shaft, thereby realizing the locking of the upper rim shaft by the locking mechanism. At this time, the position monitor monitors whether the guide rod assembly moves into place; when the main shaft is released and the air circuit is ventilated, the steel ball of the steel ball seat is partially embedded in the second groove of the piston assembly, and the locking mechanism and the upper rim shaft are not locked.

3. The tire uniformity testing machine according to claim 1, characterized in that: The guide rod assembly includes a first guide rod and a second guide rod, one end of the first guide rod extends into the avoidance groove and the other end is located outside the main shaft, one end of the second guide rod is connected to one end of the first guide rod, and the other end passes through the main shaft and the steel ball seat and is connected to the piston assembly, and the position monitor is used to monitor whether the other end of the first guide rod moves into place.

4. The tire uniformity testing machine according to claim 3, characterized in that: The first guide rods are arranged in parallel, and / or the guide rod assembly includes at least three groups.

5. The tire uniformity testing machine according to any one of claims 1 to 4, characterized in that: The position monitor comprises a signal ring and a proximity switch, wherein the signal ring is arranged at the outer end of the guide rod assembly, and the proximity switch is fixedly arranged relative to the main shaft.

6. The tire uniformity testing machine according to claim 1, characterized in that: The cylinder assembly includes a barrel, an outer guide sleeve and a pressure cover which are connected in sequence. The barrel and the outer guide sleeve are arranged on the outside of the piston assembly to form a cylindrical structure. The pressure cover is arranged at the end of the cylindrical structure.

7. The tire uniformity testing machine according to claim 6, characterized in that: A sealing ring is provided between the pressure cover and the steel ball seat, and / or between the outer guide sleeve and the piston assembly, and / or between the cylinder body and the piston assembly, and / or between the outer guide sleeve and the cylinder body, and / or between the cylinder body and the steel ball seat.

8. The tire uniformity testing machine according to claim 1, characterized in that: The piston assembly comprises a driving sleeve and a piston connected from top to bottom, the second clamping groove is arranged on the driving sleeve, and the end of the guide rod assembly is connected to the piston.

9. The tire uniformity testing machine according to claim 1, characterized in that: The upper rim and the upper rim shaft are connected via an upper rim adapter flange.

10. The tire uniformity testing machine according to claim 1, characterized in that: The steel ball seat is an inverted T-shaped structure, and the outer diameter of the upper end is smaller than the outer diameter of the lower end. The lower rim is arranged on the upper surface of the lower end of the steel ball seat.

11. The tire uniformity testing machine according to claim 1, characterized in that: The steel ball seat and the main shaft are provided with a tire inflation air path for inflating the tire.

12. The tire uniformity testing machine according to claim 1, characterized in that: When the piston assembly is located at the top of the sealed sliding cavity, the first clamping groove and the second clamping groove are arranged alternately.

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