Tire balancing machine adaptive fixture based on hub bolt hole locking and use method

Abstract

The invention discloses a tire balancing machine adaptive fixture based on hub bolt hole locking and a use method, and belongs to the technical field of tire dynamic balance detection. The locking device comprises a center disc and a plurality of locking columns. The center of the center disc is provided with a center shaft hole used for being connected with a balancing machine main shaft and provided with a plurality of sets of first connecting holes evenly distributed in the circumferential direction with the center shaft hole as the center. One end of the locking column is an installation end, the other end of the locking column is an insertion end, the installation end is selectively connected with the first connecting holes in different positions of the center disc so as to be matched with the hubs with the corresponding diameters, the insertion end penetrates through the corresponding bolt holes in the hubs, and a conical surface structure is arranged at the end of the insertion end and used for guiding centering during insertion; and after being inserted, the bolt is in interference fit with the inner wall of the bolt hole to realize locking. Hub bolt hole positioning replaces center hole locking, the adjustable locking column is matched with the multi-hole hub, conical surface self-centering and interference self-locking are utilized, damage to the hub is avoided, and the device is suitable for dynamic balance detection of various vehicle types.

Description

Technical Field

[0001] This invention belongs to the field of tire dynamic balancing testing technology, specifically relating to a tire balancing machine adapter fixture and its usage method based on wheel hub bolt hole locking. Background Technology

[0002] Tire balancing machines are essential equipment in automotive repair and maintenance, used to detect the imbalance and phase of tires during rotation. Current technology typically uses a center hole positioning method, fixing the tire to the machine's spindle via a center hole locking device. However, this center hole positioning method has the following problems: First, the center hole locking device requires a large locking force, which can easily damage the center hole of the aluminum alloy wheel hub, especially for large off-road tires, where excessive force can easily cause deformation of the center hole. Second, the positioning accuracy of the center hole is relatively low, and it is prone to slight eccentricity during high-speed rotation, affecting the detection accuracy. In addition, the center hole size of wheel hubs varies for different vehicle models, requiring the use of center hole clamps of various specifications, which increases equipment cost and operational complexity. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, the purpose of this invention is to provide a tire balancing machine adapter clamp and its usage method based on wheel hub bolt hole locking.

[0004] This invention provides the following technical solution: a tire balancing machine adapter clamp based on wheel hub bolt hole locking, comprising a central plate and multiple locking pins detachably mounted on the central plate; the central plate has a central shaft hole for connecting with the main shaft of the balancing machine, and multiple sets of first connecting holes evenly distributed circumferentially around the central shaft hole; one end of each locking pin is an mounting end, and the other end is an insertion end. The mounting end can be selectively connected to the first connecting holes at different positions on the central plate to adapt to wheel hubs of corresponding diameters. The insertion end passes through the corresponding bolt hole on the wheel hub. The end of the insertion end has a tapered surface structure for guiding alignment during insertion and forming an interference fit with the inner wall of the bolt hole after insertion to achieve locking.

[0005] Furthermore, each set of first connecting holes is located on a distributed circumference of different diameters to accommodate hubs with different pitch circle diameters.

[0006] Furthermore, the central disk is provided with two sets of first connecting holes, one set of which has a circumference diameter that matches the standard pitch circle diameter of a five-hole wheel hub, and the other set of which has a circumference diameter that matches the standard pitch circle diameter of a six-hole wheel hub.

[0007] Furthermore, the mounting end of the locking pin is inserted into the corresponding first connecting hole and tightly fitted with the first connecting hole, and a set of elastic elements for tight fitting are provided on the mounting end.

[0008] Furthermore, the elastic element is one of an O-ring, a spring retainer, or a rubber sleeve.

[0009] Furthermore, the locking column is a split assembly structure, including upper and lower columns that are tightly fitted together, with the upper column serving as the mounting end and the lower column serving as the insertion end.

[0010] Furthermore, the central disk is provided with annular guide structures extending outward along the edge of the central shaft hole on both sides.

[0011] Furthermore, the outer side of the clamp is provided with a positioning sleeve for limiting the position.

[0012] A method for using a tire balancing machine clamp based on hub bolt hole positioning includes the following sequential steps: Step S1: Initial tire alignment Lift the tire to be tested, align the center hole of the hub axially and fit it onto the main shaft of the balancing machine. The tire is temporarily supported on the main shaft without clamps. Step S2: Fixture alignment and insertion Select a multi-functional clamp that matches the number and distribution of the wheel hub bolt holes, and slide it in from the outside of the tire along the main shaft axis, so that the multiple locking pins on the clamp are respectively inserted into the bolt holes of the wheel hub; Step S3: Axial propulsion and self-locking Continue advancing the clamp along the axial direction until the tapered surface at the end of the locking column forms an interference fit with the wheel hub bolt hole, thus achieving reliable fixation of the tire on the main shaft; Step S4: Balance Detection After the clamp is installed, start the balancing machine to drive the tire and clamp to rotate as a whole for dynamic balance testing and adjustment.

[0013] By employing the above-described technology, the beneficial effects of the present invention compared to the prior art are as follows: 1) In this invention, the wheel hub bolt hole positioning method is used instead of the traditional center hole locking method, which has higher positioning accuracy and is suitable for dynamic balance testing of large-size and off-road tires. It can perfectly match the driving process and better reflect the true dynamic balance state of the tire. 2) The clamp of this invention adopts a multi-set first connecting hole design. By selecting the first connecting holes at different positions to install the locking pin, it can be adapted to five-hole and six-hole wheel hubs, with strong versatility and is suitable for a variety of car, SUV, off-road vehicle, commercial vehicle and other models on the market. 3) In this invention, self-positioning and centering are achieved through the tapered surface structure at the end of the locking column, and self-locking is achieved by forming an interference fit after insertion. No additional locking operation is required, making installation simple and quick and improving work efficiency. 4) This invention avoids damage to the aluminum alloy wheel hub caused by center hole locking, protects the integrity of the wheel hub, and extends the service life of the wheel hub; 5) The locking pin of the present invention adopts a split assembly structure, which is convenient for replacement and maintenance and reduces the cost of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the clamp of the present invention; Figure 2 This is a schematic diagram of the structure of the central disk of the present invention; Figure 3 This is a schematic diagram of the locking pin structure of the present invention; Figure 4 This is a schematic diagram of the upper column of the locking column of the present invention; Figure 5 This is a schematic diagram of the structure of the lower column in the locking column of the present invention; Figure 6 This is a schematic diagram of the assembly structure of the clamp and the wheel hub of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0016] Conversely, this invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the invention as defined in the claims. Furthermore, to provide a better understanding of the invention, certain specific details are described in detail below. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0017] like Figures 1-5 As shown, the present invention provides a tire balancer adapter clamp based on wheel hub bolt hole locking, including a center plate 1 and a plurality of locking pins 2 detachably disposed on the center plate 1.

[0018] Specifically, the center plate 1 has a central shaft hole 101 for connecting to the main shaft of the balancing machine. The diameter of the central shaft hole 101 matches the diameter of the main shaft of the balancing machine, ensuring that the clamp can be stably installed on the main shaft. The center plate 1 has multiple sets of first connecting holes 102 evenly distributed circumferentially around the central shaft hole 101. Each set of first connecting holes 102 is located on a circumference with different diameters to accommodate hubs with different pitch circle diameters.

[0019] Specifically, the center plate 1 is provided with two sets of first connecting holes 102. The diameter of the circumference of one set of first connecting holes 102 matches the standard pitch circle diameter of a five-hole wheel hub, while the diameter of the circumference of the other set of first connecting holes 102 matches the standard pitch circle diameter of a six-hole wheel hub. By selecting different positions of the first connecting holes 102 to install the locking pin 2, it can be adapted to wheel hubs of different specifications, providing strong versatility.

[0020] Specifically, one end of the locking pin 2 is the mounting end 201, and the other end is the insertion end 202.

[0021] The mounting end 201 can be selectively inserted into the corresponding first connecting holes 102 on the central disk 1, and is tightly fitted with the first connecting holes 102. The mounting end 201 is provided with a set of elastic elements 3 for tight fitting; the elastic elements 3 can be one of an O-ring, a spring retainer, or a rubber sleeve. The elastic elements 3 enhance the friction between the mounting end 201 and the first connecting holes 102, preventing the locking pin 2 from loosening during rotation.

[0022] The insertion end 202 is used to pass through the corresponding bolt hole on the wheel hub, and the end of the insertion end 202 is provided with a tapered surface structure. The tapered surface structure plays a guiding and centering role when inserted into the wheel hub bolt hole, ensuring that the locking pin 2 can be smoothly inserted into the bolt hole. After insertion, the tapered surface structure forms an interference fit with the inner wall of the bolt hole, producing a radial expansion self-locking effect, realizing reliable fixation of the tire on the main shaft without the need for additional locking operations.

[0023] Specifically, the locking pin 2 adopts a split assembly structure, including an upper pin and a lower pin that fit together tightly. The upper pin serves as the mounting end 201, and the lower pin serves as the insertion end 202. This split structure facilitates replacement and maintenance. When the insertion end 202 wears out, only the lower pin needs to be replaced, reducing operating costs.

[0024] Specifically, the center plate 1 has annular guide structures 103 extending outward along the edge of the central shaft hole 101 on both sides. The outer diameter of the annular guide structure 103 is coaxial with the central shaft hole 101, and is used to initially guide the center hole of the tire hub during installation to ensure that the clamp can be smoothly inserted into the main shaft.

[0025] Specifically, a positioning sleeve for limiting the position is provided on the outer side of the clamp. The positioning sleeve can limit the axial position of the clamp on the main shaft and prevent the clamp from moving axially during rotation. The positioning sleeve adopts a hollow sleeve design, with its inner hole matching the main shaft of the balancing machine, and its outer surface is usually cylindrical or has a guide structure; the inner hole matches the main shaft with a tapered surface or precision clearance fit, and the end has a guide chamfer for easy assembly. During assembly, the positioning sleeve is inserted axially along the main shaft from the outside of the clamp. The inner hole of the positioning sleeve matches the main shaft, and the outer surface contacts the clamp. It can be gently pushed in without strong pressure. After the positioning sleeve is in place, the clamp and the hub are fixed by the self-locking of the tapered surface of the locking pin. The positioning sleeve plays an axial limiting role to prevent the clamp from moving axially during rotation.

[0026] like Figure 6 As shown, the present invention also provides a tire balancing machine fixture installation method based on hub bolt hole positioning, comprising the following sequential steps: Step S1: Initial tire alignment Lift the tire to be tested, align the center hole of the hub axially, and fit it onto the main shaft of the balancing machine. The tire is temporarily supported on the main shaft without clamps. At this time, the tire is in a free state and can be slightly rotated to adjust its position.

[0027] Step S2: Fixture alignment and insertion Based on the number of bolt holes and pitch circle diameter of the wheel hub, select the corresponding number and position of locking pins 2 and install them onto the center plate 1. For example, for a five-hole wheel hub, select five locking pins 2 and install them in the corresponding first connecting holes 102; for a six-hole wheel hub, select six locking pins 2 and install them in the corresponding first connecting holes 102. Then, insert the configured clamps axially along the main shaft from the outside of the tire, so that the insertion end 202 of each locking pin 2 is inserted into the corresponding bolt holes of the wheel hub.

[0028] Step S3: Axial propulsion and self-locking The clamp continues to advance axially until the tapered surface at the end of the locking pin 2 forms an interference fit with the wheel hub bolt hole, generating a radially expanding self-locking effect, thus reliably fixing the tire on the main shaft. Due to the guiding effect of the tapered surface structure, the locking pin 2 can automatically center, ensuring that the center of rotation of the tire coincides with the center of the main shaft.

[0029] Step S4: Balance Detection After the clamps are installed, the balancing machine is started to rotate the tire and clamps as a whole for dynamic balance testing and adjustment. Because the clamps are positioned between the clamps and the wheel hub through bolt holes, the positioning accuracy is high and can accurately reflect the true dynamic balance state of the tire.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tire balancing machine adapter clamp based on wheel hub bolt hole locking, characterized in that, The device includes a central disc (1) and multiple locking pins (2) detachably mounted on the central disc (1). The central disc (1) has a central shaft hole (101) for connecting to the main shaft of the balancing machine, and multiple sets of first connecting holes (102) are evenly distributed in a circle around the central shaft hole (101). One end of the locking pin (2) is an installation end (201), and the other end is an insertion end (202). The installation end (201) can be selectively connected to the first connecting holes (102) at different positions on the central disc (1) to match the corresponding diameter of the hub. The insertion end (202) passes through the corresponding bolt hole on the hub. The end of the insertion end (202) has a tapered surface structure for guiding alignment during insertion and forming an interference fit with the inner wall of the bolt hole after insertion to achieve locking.

2. The tire balancing machine adapter fixture based on wheel hub bolt hole locking as described in claim 1, characterized in that, Each set of first connecting holes (102) is located on a distribution circumference with different diameters to fit hubs with different pitch circle diameters.

3. The tire balancing machine adapter fixture based on wheel hub bolt hole locking according to claim 1, characterized in that, The central disk (1) is provided with two sets of first connecting holes (102), one set of first connecting holes (102) has a circumference diameter that matches the standard pitch circle diameter of a five-hole hub, and the other set of first connecting holes (102) has a circumference diameter that matches the standard pitch circle diameter of a six-hole hub.

4. The tire balancing machine adapter fixture based on wheel hub bolt hole locking as described in claim 1, characterized in that, The mounting end (201) of the locking pin (2) is inserted into the corresponding first connecting hole (102) and is tightly fitted to the first connecting hole (102). A set of elastic elements (3) for tight fitting are provided on the mounting end (201).

5. A tire balancing machine adapter fixture based on wheel hub bolt hole locking as described in claim 4, characterized in that, The elastic element (3) is one of an O-ring, a spring retainer, or a rubber sleeve.

6. The tire balancing machine adapter fixture based on wheel hub bolt hole locking according to claim 1, characterized in that, The locking column (2) is a split assembly structure, including upper and lower columns that are tightly fitted together. The upper column serves as the mounting end (201), and the lower column serves as the insertion end (202).

7. A tire balancing machine adapter fixture based on wheel hub bolt hole locking as described in claim 1, characterized in that, The central disk (1) is provided with annular guide structures (103) extending outward along the edge of the central shaft hole (101) on both sides.

8. A tire balancing machine adapter fixture based on wheel hub bolt hole locking as described in claim 1, characterized in that, The outer side of the clamp is equipped with a positioning sleeve for limiting the position.

9. A method for using a tire balancing machine clamp based on hub bolt hole positioning, characterized in that, Includes the following sequential steps: Step S1: Initial tire alignment Lift the tire to be tested, align the center hole of the hub axially and fit it onto the main shaft of the balancing machine. The tire is temporarily supported on the main shaft without clamps. Step S2: Fixture alignment and insertion Select a multi-functional clamp that matches the number and distribution of the wheel hub bolt holes, and insert it from the outside of the tire along the main shaft axis so that the multiple locking pins (2) on the clamp are inserted into the bolt holes of the wheel hub respectively; Step S3: Axial propulsion and self-locking Continue to advance the clamp along the axial direction until the tapered surface at the end of the locking column (2) forms an interference fit with the wheel hub bolt hole, thereby achieving reliable fixation of the tire on the main shaft; Step S4: Balance Detection After the clamp is installed, start the balancing machine to drive the tire and clamp to rotate as a whole for dynamic balance testing and adjustment.

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