CN111323166A

CN111323166A - Locking tool for detecting dynamic balance of tire and dynamic balance detection system of tire

Info

Publication number: CN111323166A
Application number: CN202010302936.5A
Authority: CN
Inventors: 唐敏
Original assignee: Neolix Technologies Co Ltd
Current assignee: Neolithic Unmanned Vehicle Songyang Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-06-23
Anticipated expiration: 2040-04-17
Also published as: CN111323166B

Abstract

The invention relates to the technical field of automobile tire dynamic balance detection, and provides a locking tool for tire dynamic balance detection and a tire dynamic balance detection system. The locking tool comprises a telescopic mechanism and a clamping device; the telescopic mechanism comprises a body part and a telescopic part which can be sleeved on the shaft body, and the telescopic part is matched with the body part in a telescopic way; the clamping device is arranged on the body part and used for clamping the shaft body, so that the telescopic part and the hub form a contact type fit. The tire dynamic balance detection system comprises a tire dynamic balance testing machine and the locking tool. Through the combined use of telescopic machanism and clamping device, both guaranteed that clamping device can press from both sides tight axis body effectively fast, reliable and stable can not appear "smooth silk" problem for the speed of fixed wheel again, telescopic machanism directly compresses tightly the wheel moreover, and is fixed effectual, and whole operation has practiced thrift a large amount of time costs for manual screwing.

Description

Locking tool for detecting dynamic balance of tire and dynamic balance detection system of tire

Technical Field

The invention relates to the technical field of automobile tire dynamic balance detection, in particular to a locking tool for tire dynamic balance detection and a tire dynamic balance detection system.

Background

In the process of detecting the action balance of the automobile wheel, the wheel is required to be sleeved on a shaft body of a balance testing machine, and then a locking tool is matched with a thrust disc on the shaft body to clamp and fix a hub of the wheel.

The existing locking tool is a nut with a wrench, an external thread is arranged on a shaft body of the balance testing machine, an internal thread of the locking tool is matched with the external thread on the shaft body, and a hub is extruded to the thrust disc through the rotating locking tool, so that a wheel is fixed.

For avoiding the external screw thread damage on the balance testing machine axis body, locking tool's internal thread generally adopts the soft material of metal axis body such as plastics, like this in the repeated use, very easy emergence wearing and tearing when locking tool's internal thread and the external screw thread of metal axis body join up the interlock appear promptly, "smooth silk" phenomenon, and life is low, leads to tire locking not in place in addition easily, influences the authenticity of dynamic balance detection data. In addition, the manual screwing mode is complicated to operate, the efficiency is low, and the production efficiency is also seriously influenced.

Disclosure of Invention

In order to solve at least some technical problems mentioned in the background of the invention, the invention provides a locking tool for detecting dynamic balance of a tire, which comprises a telescopic mechanism and a clamping device;

the telescopic mechanism comprises a body part and a telescopic part which can be sleeved on the shaft body, and the telescopic part is matched with the body part in a telescopic way;

the clamping device is arranged on the body part and used for clamping the shaft body, so that the telescopic part and the hub form a contact type fit.

Optionally, a cylinder cavity is formed in the side wall of the body portion, a piston rod is arranged on the telescopic portion, and the piston rod is matched with the cylinder cavity piston.

Optionally, the body portion is provided with an air inlet and an air outlet communicated with the cylinder cavity, the air inlet is provided with a one-way air valve, the one-way air valve is communicated in the air inlet direction of the air inlet, and the air outlet is provided with an exhaust valve.

Optionally, a protection pad is arranged on one side of the telescopic part facing the hub.

Optionally, the protection pad is a plastic rubber ring.

Optionally, the clamping device includes a clamping piece and an elastic piece, the middle of the clamping piece is rotatably connected to the body portion, the elastic piece is elastically connected between the clamping piece and the body portion, and the elastic piece is used for enabling the first end of the clamping piece to abut against the shaft body through an elastic action, so as to clamp the shaft body.

Optionally, the body portion is provided with a window radially penetrating through a side wall thereof, and the first end of the clip passes through the window and abuts against the shaft body.

Optionally, the rotational connection between the clip and the body portion has a set radial protrusion; the window is equipped with backstop structure on being close to wheel hub's a side frame, works as the first end of clamping piece is contradicted on the axis body, just when pars contractilis and wheel hub form the contact-type cooperation, backstop structure is right the clamping piece forms and stops, in order to prevent the clamping piece rotates to the direction of contradicting the complex with the axis body to the throw off.

Optionally, the stop structure is a ramp structure.

Optionally, the resilient member is disposed in compression between an inner side of the second end of the clip and the body portion.

Optionally, the inner side of the first end of the clamping piece is provided with a thread structure or a claw structure.

Optionally, the number of the clamping devices is multiple, and the multiple clamping devices are uniformly distributed in the circumferential direction of the body part.

The invention also provides a tire dynamic balance detection system, which comprises a tire dynamic balance testing machine and the locking tool for tire dynamic balance detection.

According to the technical scheme, the telescopic mechanism and the clamping device are combined for use, so that the clamping device can effectively and quickly clamp the shaft body, stability and reliability are realized, the problem of 'thread slipping' is avoided, the wheel fixing speed is accelerated, the telescopic mechanism directly compresses the wheel, the fixing effect is good, a large amount of time cost is saved compared with manual screwing in the whole operation, and more profits are brought to enterprises.

Drawings

FIG. 1 is a perspective view of a locking tool for detecting dynamic balance of a tire according to an embodiment of the present invention;

FIG. 2 is a top view of a locking tool for tire dynamic balance detection according to an embodiment of the present invention;

FIG. 3A is a schematic cross-sectional view taken along line B-B of FIG. 2, showing the clip in a clamping position;

FIG. 3B is a schematic cross-sectional view taken along line B-B of FIG. 2, showing the clip in an open position;

FIG. 4 is a schematic view showing a state of use of a locking tool for detecting dynamic balance of a tire according to an embodiment of the present invention;

fig. 5 is a half-sectional view of fig. 4.

Reference numerals:

1. a shaft body; 2. a tire;

10. a telescoping mechanism; 11. a body portion; 12. a telescopic part; 13. a one-way air valve; 14. an exhaust valve; 15. a cylinder body; 16. a cylinder cavity; 17. a piston rod;

20. a clamping device; 21. a sleeve; 22. a clip; 23. an elastic member; 24. a window; 25. a threaded structure or a jaw structure; 26. a rotating shaft.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

Referring to fig. 1, 4 and 5, a locking tool for detecting dynamic balance of a tire according to an embodiment of the present invention includes a telescoping mechanism 10 and a clamping device 20; the telescopic mechanism 10 comprises a body part 11 and a telescopic part 12 which can be sleeved on the shaft body 1, and the telescopic part 12 is in telescopic fit with the body part 11, namely, the body part 11 and the telescopic part 12 are both of cylindrical structures and can relatively extend and retract axially; the clamping device 20 is disposed on the body portion 11 for clamping the axle body 1, i.e. the body portion 11 can be positioned on the axle body 1 by the clamping device 20, so that when the telescopic portion 12 is telescopic relative to the body portion 12, the telescopic portion 12 can move closer and farther relative to the hub, thereby forming a contact fit with the hub.

When the tool is used, firstly, a tire 2 is sleeved on a shaft body 1 of a tire dynamic balance testing machine, then the tool is sleeved on the shaft body 1, and the shaft body 1 is clamped by a clamping device 20, so that the clamping device 20 and the body part 11 are ensured to be fixed relative to the shaft body 1; and then, one end of the telescopic part 12 is abutted against the hub of the tire 2 by utilizing the extension of the telescopic mechanism 10 and is pushed axially until the hub is blocked by the thrust disc on the shaft body 1, so that the hub is clamped, and then, a dynamic balance detection test can be carried out.

In the embodiment, through the combination of the telescopic mechanism 10 and the clamping device 20, the abrasion of the locking tool caused by frequent screwing is avoided, the stability of dynamic balance detection is greatly improved, and the authenticity of detection data is improved; in addition, experiments prove that the mode of screwing the nut on the shaft body 1 in the prior art needs 45s approximately, the scheme does not need manual screwing and tightening operations, the operation time needs about 15s approximately, and the locking efficiency of the tire 2 is greatly improved.

As shown in fig. 2, in some embodiments, the body portion 11 includes a cylinder 15 and a sleeve 21, the telescopic portion 12 is located at one axial end of the cylinder 15 and forms a telescopic fit therewith, and the sleeve 21 is disposed on the cylinder 15 and located at an axial end opposite to the telescopic portion 12; the clamping device 20 may be provided on a sleeve 21, the diameter of the sleeve 21 being smaller than the diameter of the cylinder 15, preferably slightly larger than the diameter of the shaft body 1. The side wall of the cylinder body 15 is provided with a cylinder cavity 16, the cylinder cavity 16 can be annular, the expansion part 12 is provided with a piston rod 17, and the piston rod 17 is correspondingly matched with the cylinder cavity 16 in a piston manner.

In the above embodiment, the sleeve 21 is provided with an air inlet and an air outlet which are communicated with the cylinder cavity 16, the air inlet is provided with the one-way air valve 13, the one-way air valve 13 is communicated in the air inlet direction of the air inlet, and air can be injected into the cylinder cavity 16 from the one-way air valve 13 through the air gun; the exhaust port is provided with an exhaust valve 14, and the exhaust valve 14 is preferably a press type exhaust valve, so that the exhaust operation is convenient. The one-way air valve 13 and the air exhaust valve 14 can improve the convenience of inflation and decompression.

In other embodiments, the telescoping mechanism 10 may also be hydraulically driven, rack and pinion driven, screw nut driven, and ball screw driven.

In other embodiments, the clamping means may also comprise a bolt extending through and threadedly engaging the side wall of the body portion 11 and an arcuate jaw to which the end of the bolt is rotatably connected, whereby tightening of the rotary bolt presses the arcuate jaw against the shaft body 1. It should be noted that, a person skilled in the art may also implement the clamping of the shaft body 1 by various other well-known mechanisms, which are not described in detail herein.

In some embodiments, the clamping device 20 includes a clamping piece 22 and an elastic member 23, wherein a middle portion of the clamping piece 22 is rotatably connected to the body 11 through a rotating shaft 26, two radial ends of a rotating circumference of the clamping piece 22 are defined as a first end and a second end, and the elastic member 23 may be a spring elastically connected between the clamping piece 22 and the body 11. The elastic element 23 is used for making the first end of the clip 22 abut against the shaft body 1 through the elastic force to clamp the shaft body 1. Through the combined use with clamping piece 22 and elastic component 23, can guarantee under the circumstances that does not receive external force, make the first end of clamping piece 22 inwards press from both sides tight axis body 1 all the time, after the dynamic balance detects to finish, press down the second end of clamping piece 22 with the hand and can make clamping piece 22 break away from with axis body 1, it is all very convenient to tear open, adorn and locking operation.

In a further embodiment, the number of gripping devices 20 is two, two gripping devices 20 being symmetrically arranged on the sleeve 21. The two clamping devices 20 arranged symmetrically are easy to operate with one hand, and can form a balanced clamping force on the shaft body 1.

In order to improve the clamping effect, the inner side of the first end of the clamping piece 22 is provided with a thread structure or a claw structure 25, thereby increasing the friction force with the shaft body 1. In this embodiment, an external thread is provided on the shaft body 1, and an internal thread is provided on the clamping piece 22, so that the thread structure on the clamping piece 22 is matched with the external thread on the shaft body 1. In the matching process of the two, the screwing-in process is not needed, and the thread structure on the clamping piece 22 is directly clamped on the shaft body 1, so that the abrasion on the shaft body 1 is very small, and the phenomenon of 'thread slipping' is avoided.

The main body 11 may be integrally formed, or may be composed of two parts, i.e., a cylinder cavity 16 and a sleeve 21. In the present embodiment, the body portion 11 includes the cylinder chamber 16 and the sleeve 21, and the clip 22 and the elastic member 23 are disposed on the sleeve 21; the elastic member 23 is arranged compressed between the inside of the second end of the clip 22 and the sleeve 21. Referring to fig. 3A, in the natural state, the two jaws 22 are in the clamping state. When the second end of the clip 22 is pressed by hand, the clip 22 rotates, as shown in fig. 3B, and the first end of the clip 22 is opened outward, i.e., released from engagement with the shaft body 1.

In other embodiments, the elastic member 23 may be disposed in various ways, such as: the compression is arranged between the outer side of the first end of the clamping piece 22 and the body part, the tension is arranged between the outer side of the second end of the clamping piece 22 and the body part 11 or the tension is arranged between the inner side of the first end of the clamping piece 22 and the body part 11. Furthermore, the elastic member 23 may be a torsion spring fitted over the rotation shaft 26.

In some embodiments, the sleeve 21 has a window 24 radially penetrating through a sidewall thereof, and the first end of the clip 22 passes through the window 24 and abuts against the shaft body 1. The number of windows corresponds to the number of clips 22.

Preferably, the rotational connection between the clip 22 and the main body 11 has a set radial looseness, which means that the clip 22 can slightly displace in the radial direction of rotation relative to the main body 11, that is, the diameter of the shaft hole for realizing the rotational connection and matching of the two is larger than the diameter of the rotating shaft 26; a stopping structure is arranged on a frame of one side of the window 24 close to the hub, and when the first end of the clamping piece 22 abuts against the shaft body 1 and the telescopic portion 12 and the hub form a contact fit, the stopping structure stops the clamping piece 22 to prevent the clamping piece 22 from rotating in a direction of disengaging from the contact fit with the shaft body 1.

Specifically, when the clamping piece 22 clamps the shaft body 1, the telescopic mechanism 10 extends and presses the hub of the tire 2, the air cylinder pressure is high, if an operator carelessly presses/touches the second end of the clamping piece 22, the clamping jaw and the shaft body 1 may be unhooked from each other, and then the locking tool is ejected by high-pressure air at high speed, so that the operator and the external environment are threatened.

With the above preferred embodiment, when the high pressure gas filled in the cylinder chamber 16 and the expansion part 12 tightly abut against the hub, the main body 11 will receive a stronger reaction force, and the clip 22 is fixed relative to the axle, and the rotation between the main body 11 and the clip 22 has a set radial clearance, so that the main body 11 will move a set distance relative to the clip 11 toward the rear end of the axle 1, and at the same time, the distance between one side frame of the window close to the tire 2 and the clip 22 becomes smaller, or even abuts against each other, at this time, the stop structure disposed on one side frame of the window close to the tire 2 can stop one rotation direction of the clip 22, which is the direction that will cause the claw to disengage from the axle 1, thereby preventing the second end of the clip 22 from being pressed down, and preventing danger.

When the cylinder cavity 16 is decompressed, the reaction force applied to the body 11 disappears, and the clip 22 can move relative to the body 11 within the set radial momentum, so that the clip 22 can bypass the stop structure and can be pressed down manually.

In a further embodiment, the stop structure is a ramp structure. Namely, when the cylinder cavity 16 is in a pressurized state, the rotation of the clamping piece 22 in the direction of separating from the shaft body 1 is blocked by a slope surface on the window frame, and the more obvious the rotation trend of the clamping piece 22 is, the larger the resistance of the inclined surface structure is; and when the cylinder cavity 16 is in a decompression state, the interference of the inclined surface structure to the normal rotation of the clamping piece 22 is minimum, and the second end of the clamping piece 22 can be pressed down smoothly.

In some embodiments, the telescoping section 12 is provided with a protective pad on the side facing the hub. The protection pad is used to form a cushion between the telescopic portion 12 and the wheel hub, and to prevent the wheel hub from being damaged by impact or rigid compression of the telescopic mechanism 10. In this embodiment, the protection pad may be a plastic rubber ring, but in other embodiments, the protection pad may also be made of other flexible materials.

The embodiment of the invention also provides a tire dynamic balance detection system which comprises a dynamic balance testing machine and the locking tool for tire dynamic balance detection provided by the embodiment. By adopting the tire dynamic balance detection system provided by the embodiment, the accuracy and the efficiency of the tire dynamic balance detection are obviously improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A locking tool for detecting the dynamic balance of a tire is characterized by comprising a telescopic mechanism (10) and a clamping device (20);

the telescopic mechanism (10) comprises a body part (11) and a telescopic part (12) which can be sleeved on the shaft body (1), and the telescopic part (12) is matched with the body part (11) in a telescopic way;

the clamping device (20) is arranged on the body part (11) and used for clamping the shaft body (1) so that the telescopic part (12) can form a contact type fit with the hub.

2. The locking tool for detecting the dynamic balance of the tire according to claim 1, wherein a cylinder cavity (16) is formed on a side wall of the body portion (11), a piston rod (17) is arranged on the telescopic portion (12), and the piston rod (17) is in piston fit with the cylinder cavity (16).

3. The locking tool for detecting the dynamic balance of a tire according to claim 2, wherein the body portion (11) is provided with an intake port and an exhaust port communicating with the cylinder chamber (16), the intake port is provided with a one-way air valve (13) which is open in an intake direction of the intake port, and the exhaust port is provided with an exhaust valve (14).

4. The tire dynamic balance detecting locking tool according to claim 1, wherein a protection pad is provided on a side of the expansion part (12) facing the hub.

5. The locking tool for detecting the dynamic balance of the tire as claimed in claim 4, wherein the protection pad is a plastic rubber ring.

6. The locking tool for detecting the dynamic balance of the tire according to any one of claims 1 to 5, wherein the clamping device (20) comprises a clamping piece (22) and an elastic piece (23), the middle part of the clamping piece (22) is rotatably connected with the body part (11), the elastic piece (23) is elastically connected between the clamping piece (22) and the body part (11), and the elastic piece (23) is used for enabling the first end of the clamping piece (22) to abut against the shaft body (1) through the elastic action so as to clamp the shaft body (1);

preferably, the body part (11) is provided with a window (24) which radially penetrates through the side wall of the body part, and the first end of the clamping piece (22) penetrates through the window and is abutted against the shaft body (1);

further preferably, the rotational connection between the clip (22) and the body portion (11) has a set radial throw; a stopping structure is arranged on a frame on one side edge of the window close to the hub, when the first end of the clamping piece (22) is abutted against the shaft body (1) and the telescopic part (12) is in abutting fit with the hub, the stopping structure stops the clamping piece (22) to prevent the clamping piece (22) from rotating in the direction of disengaging from the abutting fit with the shaft body (1);

further preferably, the stop structure is a bevel structure.

7. The locking tool for detecting the dynamic balance of a tire according to claim 6, wherein the elastic member (23) is provided in compression between an inner side of the second end of the clip (22) and the body portion (11).

8. The locking tool for detecting dynamic balance of tire according to claim 6, wherein the inside of the first end of the clamping piece (22) is provided with a screw structure or a claw structure (25).

9. The locking tool for tire dynamic balance detection according to claim 6, wherein the number of the clamping devices (20) is plural, and the plural clamping devices (20) are uniformly distributed in a circumferential direction of the body portion (11).

10. A tire dynamic balance test system comprising a tire dynamic balance tester and the locking tool for tire dynamic balance test according to any one of claims 1 to 9.