Auxiliary frame lower arm bolt tightening mechanism

Abstract

The utility model relates to the technical field of automobile part machining, in particular to an auxiliary frame lower arm bolt tightening mechanism which comprises a bottom plate, a straight head tightening mechanism, an elbow tightening mechanism and a photographing mechanism, and the straight head tightening mechanism, the elbow tightening mechanism and the photographing mechanism are installed on the bottom plate. The straight head tightening mechanism comprises a first tightening shaft and a straight head sleeve installed at the front end of the first tightening shaft. The elbow tightening mechanism comprises a sliding plate assembly, a second tightening shaft installed on the sliding plate assembly and an elbow sleeve installed at the front end of the second tightening shaft. The utility model aims to provide an auxiliary frame lower arm bolt tightening mechanism which is used for tightening an auxiliary frame steering gear box and a lower arm bolt, and solves the technical problems that in the prior art, the production efficiency is low, and quality defects are easily caused to products or equipment is abnormally collided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to a sub-frame lower arm bolt tightening mechanism. Background Art

[0002] In the current automobile subframe production, the steering gear and the lower arm need to be tightened. In the current production process, the lower arm is pre-tightened manually, and then flows to the next station through the roller line for final tightening by manual or equipment.

[0003] The manual final tightening method requires a large torque for the bolts and there are many bolts to be tightened, so the labor intensity is high. When tightening with equipment, the robot is generally used to load the tightening gripper to tighten the steering gear and lower arm of the auxiliary vehicle; the existing tightening gripper conventionally adopts a spring buffer method, because when tightening, there are many postures of the tightening gripper, and the force of the spring in each posture is different, so the spring selection is more difficult; when the spring force is too large, it is easy to cause product quality defects and the sleeve wears too quickly; when the spring force is too small, the gripper is likely to hit the machine when the robot is running.

[0004] At the same time, due to the rise of the concept of Industry 4.0, the requirements for automation of production lines in the automotive industry are getting higher and higher. It is necessary to develop a system to optimize and improve the above problems and improve production efficiency and equipment stability. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies, the purpose of the utility model is to provide a subframe lower arm bolt tightening mechanism, which is used to tighten the subframe steering machine and the lower arm bolts, to solve the technical problems of low production efficiency and easy quality defects in products or abnormal collisions of equipment under the existing technology.

[0006] The technical solution of the utility model is a sub-frame lower arm bolt tightening mechanism, comprising a base plate, a straight head tightening mechanism installed on the base plate, an elbow head tightening mechanism and a photographing mechanism, wherein the elbow head tightening mechanism is connected to a cylinder; the straight head tightening mechanism comprises a first tightening shaft, a straight head sleeve installed at the front end of the first tightening shaft; the elbow head tightening mechanism comprises a slide plate assembly, a second tightening shaft installed on the slide plate assembly, and an elbow head sleeve installed at the front end of the second tightening shaft.

[0007] Furthermore, a wireless receiver is disposed at the rear end of the first tightening shaft and the rear end of the second tightening shaft.

[0008] Furthermore, the photographing mechanism includes an external protective plate and a 3D camera installed in the external protective plate.

[0009] Furthermore, the skateboard assembly includes a skateboard and a base fixed on the bottom plate, the base is provided with a slide rail, the skateboard is provided with a slider, and the slider is installed on the slide rail; the cylinder is connected and fixed to the skateboard.

[0010] Furthermore, a connecting block is provided on the slide plate, and the second tightening shaft is fixed on the connecting block.

[0011] Furthermore, in order to stably fix the tightening station, a connecting mounting plate is also provided on the base plate.

[0012] The beneficial effect of the utility model is that it is a sub-frame lower arm bolt tightening mechanism, which is mainly composed of a straight tightening shaft, an elbow tightening shaft, a sleeve, a guide rail, a slide plate, a cylinder, and a 3D camera. The roller conveyor transports the workpiece to the tightening station. After the robot starts to take a photo and locate the workpiece, it drives the tightening mechanism to tighten the bolts one by one. The elbow tightening shaft is buffered by a cylinder, and the cylinder switches compressed air of different pressures through the solenoid valve air circuit to achieve automatic adjustment of the buffering force, so as to replace the previous spring buffer structure. By using a cylinder for buffering and adjusting the extension force of the cylinder through compressed air of different pressures, the extension force can be automatically adjusted to adapt to the force conditions under different postures; the 3D camera is used for photo positioning to compensate for the position difference caused by the processing error of the sub-frame and the error of the positioning tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] For ease of explanation, the present invention is described in detail with reference to the following preferred embodiments and accompanying drawings.

[0014] Figure 1 This is a front plan view of a bolt tightening mechanism for a lower arm of a sub-frame according to the utility model;

[0015] Figure 2 It is a front view three-dimensional structural schematic diagram of a sub-frame lower arm bolt tightening mechanism of the utility model;

[0016] Figure 3 The utility model is a top view of a three-dimensional structure of a bolt tightening mechanism for a lower arm of a sub-frame.

[0017] Figure numerals: base plate 1, straight head tightening mechanism 2, elbow head tightening mechanism 3, camera mechanism 4, first tightening shaft 21, straight head sleeve 22, slide plate assembly 5, second tightening shaft 31, elbow head sleeve 32, wireless receiver 6, external guard plate 41, 3D camera 42, base 51, slide plate 52, cylinder 7, slide rail 53, slider 54, connecting block 511, connecting mounting plate 8, stabilizing frame 11. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] The following is a further description of the subframe lower arm bolt tightening mechanism described in the utility model with reference to the accompanying drawings:

[0021] like Figure 1-3 The sub-frame lower arm bolt tightening mechanism shown in the figure includes a base plate 1, a straight head tightening mechanism 2 installed on the base plate 1, an elbow tightening mechanism 3 and a photographing mechanism 4. The photographing mechanism 4 includes an external guard plate 41 and a 3D camera 42 installed in the external guard plate 41 to protect the camera from damage. The position of each screw can be better detected by performing an all-round scan of the workpiece with the 3D camera. A connecting mounting plate 8 is provided on the base plate 1, and the tightening mechanism can be fixed in a suitable position by connecting the mounting plate.

[0022] In this embodiment, the elbow tightening mechanism is connected to a cylinder 7, which controls the buffer. The cylinder switches compressed air of different pressures through the solenoid valve air circuit to achieve automatic adjustment of the buffer force, thereby replacing the previous spring buffer style; the straight head tightening mechanism 2 includes a first tightening shaft 21, a straight head sleeve 22 installed at the front end of the first tightening shaft 21, and a stabilizing frame 11 is provided on the bottom plate for stabilizing the straight head tightening mechanism; the elbow tightening mechanism 3 includes a slide plate assembly 5, a second tightening shaft 31 installed on the slide plate assembly 5, and an elbow sleeve 32 installed at the front end of the second tightening shaft 31.

[0023] In this embodiment, the skateboard assembly 5 consists of a skateboard 51 and a base 52 fixed on the bottom plate 1, a slide rail 53 is provided on the base 52, and a slider 54 is provided on the skateboard 51, and the slider 54 is installed on the slide rail 53; the cylinder 7 is connected and fixed to the skateboard 51, and the skateboard can be displaced on the base, and automatic buffer adjustment is realized under the action of the cylinder. A connecting block 511 is also provided on the skateboard 51, and the second tightening shaft 31 is fixed on the connecting block 511 to ensure that the second tightening shaft does not shake.

[0024] In this embodiment, wireless receivers 6 are provided at the rear ends of the first tightening shaft 21 and the second tightening shaft 31 , and various operation instructions can be obtained through the wireless receivers to realize automated production in practical applications.

[0025] The utility model discloses a bolt tightening mechanism for the lower arm of a sub-frame, which is mainly composed of a straight tightening shaft, an elbow tightening shaft, a sleeve, a guide rail, a slide plate, a cylinder, and a 3D camera. The roller conveyor transports the workpiece to the tightening station. After the robot starts to take a photo and locate the workpiece, it drives the tightening mechanism to tighten the bolts one by one. The elbow tightening shaft is buffered by a cylinder. The cylinder switches compressed air of different pressures through the solenoid valve air circuit to achieve automatic adjustment of the buffering force, replacing the previous spring buffering structure. The cylinder is used for buffering, and the extension force of the cylinder is adjusted by compressed air of different pressures to achieve automatic adjustment of the extension force to adapt to the force conditions under different postures; the 3D camera is used for photo positioning to compensate for the position difference caused by the processing error of the sub-frame and the error of the positioning tray.

[0026] 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 in the protection scope of the present invention.

Claims

1. A sub-frame lower arm bolt tightening mechanism, characterized in that: It includes a base plate, a straight tightening mechanism installed on the base plate, an elbow tightening mechanism and a photographing mechanism, wherein the elbow tightening mechanism is connected to a cylinder; the straight tightening mechanism includes a first tightening shaft and a straight sleeve installed at the front end of the first tightening shaft; the elbow tightening mechanism includes a slide plate assembly, a second tightening shaft installed on the slide plate assembly, and an elbow sleeve installed at the front end of the second tightening shaft.

2. A subframe lower arm bolt tightening mechanism according to claim 1, characterized in that: A wireless receiver is disposed at the rear end of the first tightening shaft and the rear end of the second tightening shaft.

3. The subframe lower arm bolt tightening mechanism according to claim 1, characterized in that: The photographing mechanism includes an external guard plate and a 3D camera installed in the external guard plate.

4. The subframe lower arm bolt tightening mechanism according to claim 1, characterized in that: The slide plate assembly comprises a slide plate and a base fixed on a bottom plate, the base is provided with a slide rail, the slide plate is provided with a slider, and the slider is installed on the slide rail; the cylinder is connected and fixed to the slide plate.

5. The subframe lower arm bolt tightening mechanism according to claim 4, characterized in that: The slide plate is provided with a connecting block, and the second tightening shaft is fixed on the connecting block.

6. The subframe lower arm bolt tightening mechanism according to claim 1, characterized in that: The bottom plate is also provided with a connecting and mounting plate.

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