Anti-collision mechanism

Abstract

The invention provides an anti-collision mechanism which comprises an anti-collision seat, an ejector rod, a spring, a detection block and a proximity switch, the anti-collision seat and a fixed seat are relatively fixed, and the ejector rod penetrates through a front side plate and a rear side plate of the anti-collision seat from left to right and is in sliding connection with the side plates; the right end of the ejector rod extends into a center hole of the first high-precision chuck in the axial direction, the end of the ejector rod is connected with a collet end opening of the first high-precision chuck, the spring and the detection block are arranged on the ejector rod in the anti-collision base in a sleeving mode, the detection block is located on the side close to the fixing base and fixedly connected with the ejector rod, and the proximity switch is arranged on one side of the ejector rod and perpendicular to the ejector rod. The detection end of the proximity switch directly faces the ejector rod, and the ejector rod can drive the detection block to move in the axial direction of the ejector rod, so that the proximity switch detects the detection block. The mechanism is of a contact type mechanical structure, and is simple in structure, high in reliability and convenient to maintain; the device is matched with a visual system of the automatic welding machine, so that machine collision caused by faults of the visual system or abnormal signals given by the visual system is prevented, and the safety and the reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automation equipment, in particular to a kind of anti-collision mechanism. BACKGROUND

[0002] As Figure 1 It is a kind of automatic welding machine double chuck mechanism, and workpiece positioning clamping is realized by the fixed chuck assembly and the moving chuck assembly oppositely arranged when welding.The fixed chuck assembly and the moving chuck assembly in the above structure are limited in action by the vision system, but it is found in actual use that when the vision system fails or abnormal signals appear, it will cause the moving chuck assembly to collide with the fixed chuck assembly;In addition, due to the dimensional error of the workpiece, when clamping the product, the clamp and the workpiece will collide due to the over-limit value, thereby causing the workpiece or clamp to be damaged.

[0003] Therefore, it is necessary to improve the existing chuck mechanism to solve the above problems. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the deficiencies in the prior art, and the present application provides an anti-collision mechanism.

[0005] The technical scheme adopted by the present application to solve its technical problem is: an anti-collision mechanism is connected to the fixed chuck assembly, the fixed chuck assembly includes a fixed seat and a first high-precision chuck, the first high-precision chuck is connected to the right side of the fixed seat, and a central hole is provided in the first high-precision chuck in the circumferential direction;The anti-collision mechanism includes an anti-collision seat, a top rod, a spring, a detection block and a proximity switch, wherein the anti-collision seat is fixed opposite to the fixed seat, specifically, the anti-collision seat is fixedly connected to the outer side of the housing of the second synchronous transmission assembly, the top rod penetrates the front and rear side plates of the anti-collision seat from left to right and is slidably connected with the side plates;The top rod extends into the central hole of the first high-precision chuck in the axial direction, and the end is connected with the collet port of the first high-precision chuck, the spring and the detection block are sleeved on the top rod inside the anti-collision seat, and the detection block is located on the side close to the fixed seat and is fixedly connected with the top rod, the proximity switch is arranged on one side of the top rod and is perpendicular to the top rod, and the detection end of the proximity switch faces the top rod, and the top rod can drive the detection block to move in the axial direction of the top rod, so that the proximity switch detects the detection block.

[0006] The anti-collision mechanism is mainly to prevent the moving chuck assembly from colliding with the product in the fixed chuck assembly when clamping the product beyond the limit value, and the product in the fixed chuck assembly will retract, after the product retracts, the corresponding top rod and detection block will also retract synchronously, the detection block retracts to trigger the proximity switch, and the proximity switch sends a signal, which is input into the PLC controller to control the equipment to stop running and alarm.

[0007] Further, in order to facilitate the installation of the proximity switch, a proximity switch mounting plate is further arranged, which is fixedly connected to the anti-collision seat, and the proximity switch is fixedly connected to the proximity switch mounting plate.

[0008] Further, in order to facilitate the adjustment of the installation position of the proximity switch, an obround adjusting hole is further arranged on the proximity switch mounting plate, the proximity switch is arranged in the adjusting hole, and the position of the proximity switch in the adjusting hole is adjustable.

[0009] Since the length of the ejector rod in the axial direction is relatively long, in order to ensure smooth movement of the ejector rod after force is applied, and to avoid bending of the whole due to gravity, a guide sleeve is further arranged, one end of the guide sleeve is fixedly connected to the side plate of the anti-collision seat, the other end of the guide sleeve extends into the center hole of the first high-precision chuck, the ejector rod passes through the guide sleeve and is in sliding connection with the guide sleeve. The guide sleeve supports and guides the ejector rod, avoids deformation of the ejector rod, and ensures smooth movement.

[0010] In order to facilitate the installation of the guide sleeve, a guide sleeve hole is further arranged on the side plate of the anti-collision seat, and the guide sleeve is arranged in the guide sleeve hole.

[0011] Further, in order to avoid axial movement of the guide sleeve under the action of friction when the ejector rod is subjected to axial force, affecting the accuracy of detection, a flange part is arranged on the outer wall of the guide sleeve, and the flange part abuts against the right side of the side plate of the anti-collision seat.

[0012] The anti-collision mechanism provided by the present application increases the anti-collision mechanism on the fixed chuck assembly, and the anti-collision mechanism can produce a buffering effect during clamping, thereby avoiding damage to the product and the chuck. The anti-collision mechanism is a contact type mechanical structure, which is simple in structure, does not require complex circuits and control systems, has high reliability, a long service life, and is easy to maintain. The anti-collision mechanism cooperates with the vision system of the automatic welding machine to form a double insurance, prevents the anti-collision mechanism from being damaged due to a fault of the vision system or an abnormal signal given by the vision system, and further improves the safety and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described below in combination with the drawings and examples.

[0014] Figure 1 is a structure diagram of a double-chuck mechanism of the automatic welding machine.

[0015] Figure 2 is an assembly structure diagram of the anti-collision mechanism and the double-chuck mechanism of the present application.

[0016] Figure 3 is Figure 2 the anti-collision mechanism.

[0017] Figure 4 is Figure 3 schematic diagram of the cross-sectional structure along the top rod axis.

[0018] Figure 5 is the anti-collision mechanism of the anti-collision mechanism.

[0019] Figure 6 schematic diagram of the structure of the anti-collision seat.

[0020] In the figure: 1, base, 2, fixed chuck assembly, 2.1, fixed seat, 2.2, first high-precision chuck, 2.3, center hole, 3, moving chuck assembly, 4, anti-collision mechanism, 4.1, anti-collision seat, 4.2, top rod, 4.3, spring, 4.4, detection block, 4.5, proximity switch, 4.6, guide sleeve, 4.61, flange part, 4.7, proximity switch mounting plate, 4.71, adjusting hole, 4.8, connecting hole, 4.9, guide sleeve hole, 5, cover. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0024] As Figures 2-6As shown, the anti-collision mechanism 4 of the present application is connected to the fixed chuck assembly 2 which is arranged on the base 1 of the double chuck mechanism of the automatic welding machine, the fixed chuck assembly 2 comprises a fixed seat 2.1 and a first high-precision chuck 2.2, the first high-precision chuck 2.2 is connected to the right side of the fixed seat 2.1, and a central hole 2.3 is arranged in the first high-precision chuck 2.2 in a circumferential direction; the anti-collision mechanism 4 comprises an anti-collision seat 4.1, a top rod 4.2, a spring 4.3, a detection block 4.4 and a proximity switch 4.5, wherein the anti-collision seat 4.1 is in a U-shaped structure as a whole, the anti-collision seat 4.1 is fixedly connected to the fixed seat 2.1, specifically, the anti-collision seat 4.1 is fixedly connected to the outer side of the cover 5 of the second synchronous transmission assembly, the top rod 4.2 penetrates the front and rear side plates of the anti-collision seat 4.1 from left to right and is slidably connected with the side plates, the right end of the top rod 4.2 extends into the central hole 2.3 of the first high-precision chuck 2.2 in an axial direction, and the end is connected to the collet port of the first high-precision chuck 2.2, the spring 4.3 and the detection block 4.4 are sleeved on the top rod 4.2 inside the anti-collision seat 4.1, the detection block 4.4 is located on the side close to the fixed seat 2.1 and is fixedly connected with the top rod 4.2, the proximity switch 4.5 is arranged on one side of the top rod 4.2 and is perpendicular to the top rod 4.2, the detection end of the proximity switch 4.5 faces the top rod 4.2, and the top rod 4.2 can drive the detection block 4.4 to move in an axial direction of the top rod 4.2, so that the proximity switch 4.5 detects the detection block 4.4.

[0025] As Figures 4-6As shown, to facilitate the installation of the proximity switch, a proximity switch mounting plate 4.7 is also included. The proximity switch mounting plate 4.7 is fixedly connected to the anti-collision seat 4.1, and the proximity switch 4.5 is fixedly connected to the proximity switch mounting plate 4.7. To facilitate the adjustment of the installation position of the proximity switch 4.5, the proximity switch mounting plate 4.7 is also provided with an oval adjustment hole 4.71. The proximity switch is installed in the adjustment hole 4.71, and the position of the proximity switch 4.5 in the adjustment hole 4.71 is adjustable. Since the push rod 4.2 is relatively long along the axial direction, to ensure its smooth movement under force and to avoid overall deformation and bending due to gravity, a guide sleeve 4.5 is also included. One end of the guide sleeve 4.5 is fixedly connected to the side plate of the anti-collision seat 4.1, and the other end extends into the center hole 2.3 of the first high-precision chuck 2.2. The push rod 4.2 passes through the guide sleeve 4.5 and is slidably connected to the guide sleeve 4.5. The guide sleeve 4.5 supports and guides the top rod 4.2 to prevent deformation and ensure smooth movement. To facilitate the installation of the guide sleeve 4.5, a guide sleeve hole 4.9 is provided on the side plate of the anti-collision seat 4.1, and the guide sleeve 4.5 is installed within the guide sleeve hole 4.9. To facilitate the connection and fixation of the anti-collision seat 4.1, multiple oval connecting holes 4.8 are also provided on its side plate. To prevent the guide sleeve 4.5 from axially moving under friction when the top rod 4.2 is subjected to axial force, thus affecting the accuracy of the detection, a flange portion 4.61 is provided on the outer wall of the guide sleeve 4.5, and the flange portion 4.61 abuts against the right side of the side plate of the anti-collision seat 4.1.

[0026] The anti-collision mechanism 4 in this embodiment is mainly used in the double chuck mechanism of the automatic welding machine. For the detailed structure and working principle of the double chuck mechanism of the automatic welding machine, please refer to Chinese invention patent application No. 202521849989.3. Therefore, it will not be described in detail here.

[0027] Working principle: like Figure 5 As shown in the figure, the red arrows indicate the direction of force and the direction of movement. When the right end of the first high-precision chuck 2.2 is clamping the workpiece, it will be subjected to the reaction force of the workpiece in the direction of the arrow. Under the action of this force, the push rod 4.2 will be pushed to the left along the arrow. The detection block 4.4 fixed on the push rod 4.2 will also move synchronously. When an abnormality occurs and the limit position is exceeded, the movement position of the detection block 4.4 reaches the detection end of the proximity switch 4.5. The proximity switch 4.5 outputs a signal to indicate that the travel limit is exceeded, thereby stopping the movement of the automatic welding machine control moving chuck assembly 3 to avoid collision and damage to the workpiece or chuck.

[0028] The above is the ideal embodiment of the present application, and the above description can be changed and modified without departing from the scope of the present application. The technical scope of the present application is not limited to the above description, and should be determined by the scope of the claims.

Claims

1. A collision avoidance mechanism, characterized in that: The anti-collision mechanism is connected to the fixed chuck assembly, which includes a fixed base and a first high-precision chuck. The first high-precision chuck is connected to the right side of the fixed base and has a central hole along its circumferential direction. The anti-collision mechanism includes an anti-collision seat, a push rod, a spring, a detection block, and a proximity switch. The anti-collision seat is fixed relative to the fixed base. The push rod passes through the front and rear side plates of the anti-collision seat from left to right and is slidably connected to the side plates. The right end of the push rod extends axially into the central hole of the first high-precision chuck, and its end is connected to the collet port of the first high-precision chuck. The spring and the detection block are sleeved on the push rod inside the anti-collision seat, and the detection block is located on the side closer to the fixed base and is fixedly connected to the push rod. The proximity switch is located on one side of the push rod and is perpendicular to the push rod. The detection end of the proximity switch faces the push rod, and the push rod can drive the detection block to move axially along the push rod, so that the proximity switch detects the detection block.

2. The anti-collision mechanism as described in claim 1, characterized in that: It also includes a proximity switch mounting plate, which is fixedly connected to the anti-collision seat, and the proximity switch is fixedly connected to the proximity switch mounting plate.

3. The anti-collision mechanism as described in claim 2, characterized in that: The proximity switch mounting plate is also provided with an oval adjustment hole, the proximity switch is installed in the adjustment hole, and the position of the proximity switch in the adjustment hole is adjustable.

4. The anti-collision mechanism as described in claim 1, characterized in that: It also includes a guide sleeve, one end of which is fixedly connected to the side plate of the anti-collision seat, and the other end extends into the center hole of the first high-precision chuck. The push rod passes through the guide sleeve and is slidably connected to the guide sleeve.

5. The anti-collision mechanism as described in claim 4, characterized in that: The side plate of the anti-collision seat is also provided with a guide sleeve hole, and the guide sleeve is installed in the guide sleeve hole.

6. The anti-collision mechanism as described in claim 4, characterized in that: The outer wall of the guide sleeve is provided with a flange, which abuts against the right side of the anti-collision seat side plate.

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