Nut tightening and torque testing machine

Abstract

The utility model provides a nut tightening and torque detection machine, which belongs to the field of automatic equipment. It solves the problem of manual assembly of existing wheel hub nuts. The nut tightening and torque detection machine includes a control system, an equipment frame and a hub tooling. The equipment frame is provided with a jacking and positioning mechanism, and the hub tooling can be positioned and installed on the jacking and positioning mechanism. A tightening mechanism is provided in the equipment frame, and a moving mechanism is also provided on the equipment frame. The moving mechanism includes a moving slide rail, a moving support plate, and a servo motor. An anti-lifting cylinder is provided at the end of the moving slide rail. The tightening mechanism includes a tightening shaft and a driving motor. A precision reducer is provided between the tightening shaft and the driving motor, and a detection mechanism is provided between the servo motor and the tightening head. The utility model has the advantages of high assembly efficiency and accurate detection.

Description

Technical Field

[0001] The utility model belongs to the field of automatic equipment and relates to a nut tightening and rotation torque detection machine. Background Art

[0002] With the continuous development of industry, the automobile industry has also developed rapidly, and people's requirements for automobile quality are also constantly improving, especially the tightening and assembly of automobile wheel hub main nuts and the requirements for bearing preload are relatively strict. At present, many automobile manufacturers generally use manual assembly when assembling wheel hub main nuts, and reverse the shaft head nut by 1 / 4 to 1 / 8 turn. This method relies on the experience of the assembly workers to judge the locking and reverse rotation stroke of the shaft head nut 4, which is highly subjective, and the axle assembly quality is uneven, with a high rework rate. Summary of the invention

[0003] The purpose of the utility model is to provide a nut tightening and rotation torque detection machine to solve the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved by the following technical solutions: a nut tightening and torque detection machine, characterized in that it includes a control system, an equipment frame and a hub tooling for hub installation, and a jacking and positioning mechanism for jacking and positioning the hub tooling is provided on the equipment frame;

[0005] The hub tooling can be positioned and installed on the jacking and positioning mechanism;

[0006] A tightening mechanism that can move up and down and is used to tighten the hub nut is arranged in the equipment frame;

[0007] A moving mechanism for driving the tightening mechanism to move up and down is also provided on the equipment frame, and the moving mechanism includes a moving slide rail located on the equipment frame, a moving support plate cooperating with the moving slide rail, and a servo motor for driving the moving support plate to move up and down;

[0008] A reverse-lifting cylinder for lifting the movable support plate is arranged at the end of the movable slide rail;

[0009] The tightening mechanism comprises a tightening shaft for tightening the hub nut and a driving motor for driving the tightening head to work, and a precision reducer is arranged between the tightening shaft and the driving motor;

[0010] A detection mechanism for detecting the rotational torque is also provided between the servo motor and the tightening head;

[0011] The tightening mechanism, the moving mechanism, the anti-lifting cylinder, the lifting positioning mechanism and the detecting mechanism can realize automatic tightening of the wheel hub nut and detection of the rotational torque under the control of the control system.

[0012] In the above-mentioned nut tightening and torque detection machine, the detection mechanism can drive the inner gear ring of the wheel hub to rotate and detect the torque, and is electrically connected to the control system. A torque sensor for detecting the tightening torque is arranged above the detection mechanism.

[0013] In the above-mentioned nut tightening and rotation torque detection machine, the torque sensor is connected to the control system, and a display screen for observing, displaying and operating detection data is also provided on the equipment frame, and the display screen is electrically connected to the control system.

[0014] In the above-mentioned nut tightening and torque detection machine, a blocking mechanism for limiting the position of the moving support plate is arranged on the moving slide rail.

[0015] Compared with the prior art, the nut tightening and rotational torque detection machine has a reasonable structural design. The connecting end of the tightening shaft is detachably connected with a sleeve, which can be plugged into the wheel hub nut and drive the shaft head nut to rotate forward and reversely. By configuring different sleeves, the shaft head nut tightening and rotational torque detection equipment of the utility model can be applied to wheel hub nuts of various sizes. At the same time, by cooperating with the detection mechanism, the anti-lifting cylinder and the lifting and positioning mechanism, the rotational torque after the wheel hub nut is tightened can be detected, thereby realizing the integration of nut tightening and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a main structural schematic diagram of the nut tightening and rotation torque detection machine.

[0017] Figure 2 It is a side view structural schematic diagram of the nut tightening and rotation torque detection machine.

[0018] In the figure, 1. Equipment frame; 2. Wheel hub tooling; 3. Lifting and positioning mechanism; 4. Moving slide rail; 5. Moving support plate; 6. Servo motor; 7. Counter-lifting cylinder; 8. Tightening shaft; 9. Driving motor; 10. Precision reducer; 11. Detection mechanism; 12. Torque sensor; 13. Display screen; 14. Blocking mechanism. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2As shown, the nut tightening and torque detection machine includes a control system, an equipment frame 1 and a hub tooling 2 for mounting a hub, the equipment frame 1 is provided with a jacking and positioning mechanism 3 for jacking and positioning the hub tooling 2, the hub tooling 2 can be positioned and mounted on the jacking and positioning mechanism 3, the equipment frame 1 is provided with a tightening mechanism that can move up and down and is used for tightening the hub nut, the equipment frame 1 is also provided with a moving mechanism for driving the tightening mechanism to move up and down, the moving mechanism includes a moving slide rail 4 located on the equipment frame 1, a moving support plate 5 that cooperates with the moving slide rail 4, and a moving support plate 5 for driving the moving slide rail 4. A servo motor 6 is provided for moving the movable pallet 5 up and down, and a reverse-lifting cylinder 7 is provided at the end of the movable slide rail 4 for lifting the movable pallet 5. The tightening mechanism includes a tightening shaft 8 for tightening the hub nut and a driving motor 9 for driving the tightening head. A precision reducer 10 is provided between the tightening shaft 8 and the driving motor 9. A detection mechanism 11 for detecting the rotational torque is also provided between the servo motor 6 and the tightening head. The tightening mechanism, the moving mechanism, the reverse-lifting cylinder 7, the lifting and positioning mechanism 3 and the detection mechanism 11 can realize automatic tightening of the hub nut and detection of the rotational torque under the control of the control system.

[0021] This equipment is a tightening detection machine, which is used to tighten the wheel hub nut and detect the rotational torque. The equipment consists of a bed, a tightening shaft 8, a moving mechanism, a drive motor 9, a precision reducer 10, a counter-jacking cylinder 7, a pneumatic jacking positioning mechanism and a control system.

[0022] The above-mentioned structural design is reasonable. The connecting end of the tightening shaft 8 is detachably connected with a sleeve, which can be plugged into the wheel hub nut and drive the shaft head nut to rotate forward and reversely. By configuring different sleeves, the shaft head nut tightening and rotational torque detection equipment of the utility model can be applied to wheel hub nuts of various sizes. At the same time, by cooperating with the detection mechanism 11, the anti-lifting cylinder 7 and the lifting and positioning mechanism 3, the rotational torque after the wheel hub nut is tightened can be detected, thereby realizing the integration of nut tightening and detection.

[0023] To further elaborate, the detection mechanism 11 can drive the inner gear ring of the wheel hub to rotate and detect the rotational torque, and is electrically connected to the control system. A torque sensor 12 for detecting the tightening torque is arranged above the detection mechanism 11, and the torque sensor 12 is connected to the control system. A display screen 13 for observing, displaying and operating detection data is also arranged on the equipment frame 1, and the display screen 13 is electrically connected to the control system.

[0024] Preferably, a blocking mechanism 14 for limiting and blocking the moving support plate 5 is provided on the moving slide rail 4 .

[0025] Preferably, the tightening shaft 8 is provided with an elastic sleeve for tightening the nut with torque and having a detachable structure, and the elastic sleeve can be replaced according to hub nuts of different specifications and sizes.

[0026] Working steps

[0027] 1. The hub tooling 2 enters the tightening station in the equipment frame 1. The photoelectric switch confirms whether there is a workpiece (if there is no workpiece, the accompanying tooling is automatically released), and the lifting and positioning mechanism rises to position and lift the hub tooling 2;

[0028] 2. Manually take the planetary wheel carrier from the material tray and install it into the inner gear ring, and pre-tighten the large nut;

[0029] 3. Press the start button, the moving mechanism drives the tightening shaft 8 to descend, and after the elastic sleeve on the tightening shaft 8 is inserted into the large nut, the nut is automatically tightened to the set torque, the tightening machine stops, the tightening mechanism gear automatically separates from the detection gear, the reverse cylinder 7 rises to disengage the tightening mechanism from the nut, and the detection mechanism 11 starts to drive the inner gear ring to detect the rotational torque. The tightening torque and starting torque are directly displayed on the human-machine interface;

[0030] 4. Manually tighten the positioning screw, press the test button, and test the starting torque again;

[0031] 5. After the inspection is completed, all mechanisms return to their original positions, the pneumatic stopper descends, and the wheel hub tooling 2 is released to enter the next process.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0033] Although this article uses more terms such as equipment frame 1, wheel hub fixture 2, lifting and positioning mechanism 3, moving slide rail 4, moving support plate 5, servo motor 6, anti-lifting cylinder 7, tightening shaft 8, driving motor 9, precision reducer 10, detection mechanism 11, torque sensor 12, display screen 13, blocking mechanism 14, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. Nut tightening and torque testing machine, characterized in that: It comprises a control system, an equipment frame (1) and a wheel hub tooling (2) for mounting the wheel hub, wherein the equipment frame (1) is provided with a lifting and positioning mechanism (3) for lifting and positioning the wheel hub tooling (2); The wheel hub tooling (2) can be positioned and installed on the jacking and positioning mechanism (3); A tightening mechanism that can move up and down and is used to tighten the hub nut is arranged in the equipment frame (1); A moving mechanism for driving the tightening mechanism to move up and down is also provided on the equipment frame (1), the moving mechanism comprising a moving slide rail (4) on the equipment frame (1), a moving support plate (5) cooperating with the moving slide rail (4), and a servo motor (6) for driving the moving support plate (5) to move up and down; A reverse-lift cylinder (7) for lifting the movable support plate (5) is provided at the end of the movable slide rail (4); The tightening mechanism comprises a tightening shaft (8) for tightening the hub nut and a driving motor (9) for driving the tightening head to work, and a precision reducer (10) is provided between the tightening shaft (8) and the driving motor (9); A detection mechanism (11) for detecting the rotational torque is also provided between the servo motor (6) and the tightening head; The tightening mechanism, the moving mechanism, the anti-lifting cylinder (7), the lifting and positioning mechanism (3) and the detection mechanism (11) can realize automatic tightening of the hub nut and detection of the rotational torque under the control of the control system.

2. The nut tightening and torque detection machine according to claim 1, characterized in that: The detection mechanism (11) can drive the wheel hub inner gear ring to rotate and detect the rotational torque, and is electrically connected to the control system. A torque sensor (12) for detecting the tightening torque is arranged above the detection mechanism (11).

3. The nut tightening and torque detection machine according to claim 2, characterized in that: The torque sensor (12) is connected to a control system. A display screen (13) for observing, displaying and operating detection data is also provided on the equipment frame (1). The display screen (13) is electrically connected to the control system.

4. The nut tightening and torque detection machine according to claim 1, characterized in that: A blocking mechanism (14) for limiting and blocking the moving support plate (5) is provided on the moving slide rail (4).

5. The nut tightening and torque detection machine according to claim 1, characterized in that: The tightening shaft (8) is provided with an elastic sleeve which is used for tightening the nut with torque and has a detachable structure. The elastic sleeve can be replaced according to wheel hub nuts of different specifications and sizes.

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