Indirect detection clamping mechanism

Abstract

The utility model relates to the technical field of welding detection equipment, in particular to an indirect detection clamping mechanism which comprises a pressing air cylinder, a pressing arm and a proximity switch and further comprises a heat insulation cover and a floating rod, the heat insulation cover is fixed to the top of the pressing arm, and the proximity switch is horizontally arranged in the heat insulation cover. The floating rod is slidably arranged on the pressing arm in the vertical direction, the upper end of the floating rod is arranged in the heat shield and used for shielding the sensing end of the proximity switch, and the lower end of the floating rod is arranged below the pressing arm and used for abutting against a to-be-welded workpiece; the proximity switch is protected through the heat insulation cover, so that the proximity switch is not prone to being damaged by high temperature generated during arc welding, meanwhile, the proximity switch is not in direct contact with a workpiece to be welded through the floating rod, and the service life of the proximity switch is prolonged. The problem that a proximity switch of an existing welding detection clamp is prone to being damaged by high temperature generated during arc welding is solved, and the maintenance frequency of the proximity switch is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding detection equipment, in particular to an indirect detection clamping mechanism. Background Art

[0002] With the continuous improvement of the level of automation in the manufacturing industry, traditional detection technologies have been widely used in various industrial applications. For example, in the spot welding process, a welding detection fixture equipped with a proximity switch is usually used to detect the position and confirm the status of the workpiece, such as the welding detection fixture disclosed in CN215867166U.

[0003] For example, the proximity switch on the welding detection fixture mentioned above is external. When the fixture is used for arc welding, arc welding generates a lot of high temperature compared to spot welding. Therefore, the proximity switch is very likely to malfunction or even be damaged due to long-term exposure to high temperature environment, which makes the maintenance frequency of the proximity switch high. Utility Model Content

[0004] In view of this, the utility model proposes an indirect detection clamping mechanism, which protects the proximity switch by providing a heat insulation cover, so that the proximity switch is not easily damaged by the high temperature generated during arc welding. At the same time, by providing a floating rod, the proximity switch is not directly in contact with the workpiece to be welded, which is beneficial to improving the service life of the proximity switch, solving the problem that the proximity switch of the existing welding detection fixture is easily damaged by the high temperature generated during arc welding, and effectively reducing the maintenance frequency of the proximity switch.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] The utility model provides an indirect detection clamping mechanism, comprising a pressing cylinder, a pressing arm and a proximity switch, wherein:

[0007] One end of the pressing arm is fixedly connected to the output end of the pressing cylinder, and the other end extends along a first preset direction and is fixedly connected to the proximity switch, where the first preset direction is a horizontal direction;

[0008] Also included are a heat shield and a floating rod, wherein

[0009] The heat shield is fixed on the top of the pressure arm, and the proximity switch is horizontally arranged inside the heat shield;

[0010] The floating rod is vertically slidably arranged on the pressing arm. The upper end of the floating rod is arranged inside the heat insulation cover and is used to shield the sensing end of the proximity switch. The lower end is arranged below the pressing arm and is used to support the workpiece to be welded.

[0011] On the basis of the above technical solution, preferably, the pressing cylinder and the pressing arm form a vertical flipping mechanism.

[0012] On the basis of the above technical solution, preferably, a protrusion is provided on the top of the pressure arm, and the proximity switch passes through the protrusion and is fixedly connected.

[0013] On the basis of the above technical solution, preferably, the upper end of the floating rod is arranged on a side of the protrusion away from the pressing cylinder.

[0014] On the basis of the above technical solution, preferably, a heat insulation coating is provided on the inner surface of the heat insulation cover.

[0015] On the basis of the above technical solution, preferably, a wiring hole is provided on one end of the heat insulation cover close to the pressing cylinder.

[0016] On the basis of the above technical solution, preferably, the heat insulation cover is buckled upside down on the top of the pressure arm and fixedly connected by bolts.

[0017] On the basis of the above technical solution, preferably, a through hole is vertically provided on the pressure arm, and the floating rod is slidably provided in the through hole, wherein,

[0018] The upper end of the floating rod is provided with a first flange, and the first flange is arranged inside the heat insulation cover.

[0019] On the basis of the above technical solution, preferably, it further includes a pressing block, a compression spring and a sleeve, wherein,

[0020] The pressing block is fixed to the lower end of the floating rod, and the lower end of the pressing block is provided with a second flange;

[0021] The compression spring is sleeved on the outside of the floating rod, the lower end of the compression spring abuts against the top of the pressure block, and the upper end abuts against the bottom of the pressure arm;

[0022] The sleeve is sleeved on the outside of the compression spring, and the upper end of the sleeve is fixedly connected to the bottom of the pressure arm;

[0023] The upper end of the pressing block is slidably arranged in the sleeve, and the top of the second flange and the bottom of the sleeve selectively abut against each other.

[0024] On the basis of the above technical solution, preferably, it further includes a fixed base, wherein the fixed base is fixed to the side of the pressing cylinder.

[0025] The indirect detection clamping mechanism of the utility model has the following beneficial effects compared with the prior art:

[0026] (1) By arranging the proximity switch inside the heat insulation cover, it is convenient to isolate the external high temperature through the heat insulation cover, thereby realizing protection of the proximity switch, making it less likely to be damaged by the high temperature generated during arc welding. At the same time, by arranging the floating rod, the proximity switch is not directly in contact with the workpiece to be welded, avoiding direct transmission of high temperature to the proximity switch, which is beneficial to prolonging the service life of the proximity switch, effectively reducing the maintenance frequency, and improving the stability of the operation of the proximity switch.

[0027] (2) By setting up a heat shield, dust can be effectively isolated, making it difficult for dust to adhere to the sensing end of the proximity switch, reducing false alarms or failures caused by dust, and further reducing maintenance requirements.

[0028] (3) By setting the top of the second flange and the bottom of the sleeve to selectively abut against each other, the mechanism has both the function of clamping the workpiece and the function of position detection, realizing the combination of clamping and detection, which can effectively reduce the number of welding fixtures arranged on the welding platform and save space above the welding platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a three-dimensional diagram of an indirect detection clamping mechanism of the utility model;

[0031] Figure 2 This is a front view of an indirect detection clamping mechanism of the utility model;

[0032] Figure 3 It is a partial cross-sectional view taken along the AA line of the present invention;

[0033] Figure 4 This is a partial exploded view of an indirect detection clamping mechanism of the utility model;

[0034] In the figure: 1. Clamping cylinder; 2. Pressing arm; 3. Proximity switch; 4. Heat shield; 5. Floating rod; 6. Pressing block; 7. Compression spring; 8. Sleeve; 9. Fixed base; 201. Protrusion; 202. Through hole; 401. Wiring hole; 501. First flange; 601. Second flange. DETAILED DESCRIPTION

[0035] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] like Figure 1-4 As shown, an indirect detection clamping mechanism of the present invention includes a pressing cylinder 1, a pressing arm 2, a proximity switch 3, a heat shield 4 and a floating rod 5.

[0037] Among them, the clamping cylinder 1 is any pneumatic clamping cylinder in the prior art, such as a welding clamping cylinder structure disclosed in CN220347573U. The clamping cylinder 1 is used to drive the pressing arm 2 to flip vertically, that is, the clamping cylinder 1 and the pressing arm 2 form a vertical flipping mechanism, and the flipping angle is 0-120 degrees. The side of the clamping cylinder 1 is fixed with a fixed base 9 by bolts, and a linear module can be set at the bottom of the fixed base 9. Specifically, the fixed base 9 is fixed to the output end of the linear module by bolts. The linear module is used to drive the fixed base 9 to move horizontally to adjust the use position of the mechanism. The linear module is not drawn in the diagram.

[0038] like Figure 3 As shown, one end of the pressing arm 2 is fixedly connected to the output end of the pressing cylinder 1, and the other end extends along a first preset direction and is fixedly connected to the proximity switch 3, and the first preset direction is a horizontal direction; the heat insulation cover 4 is fixed to the top of the pressing arm 2, and the proximity switch 3 is horizontally arranged inside the heat insulation cover 4; the floating rod 5 is vertically slidably arranged on the pressing arm 2, the upper end of the floating rod 5 is arranged inside the heat insulation cover 4 and is used to shield the sensing end of the proximity switch 3, and the lower end is arranged below the pressing arm 2 and is used to support the workpiece to be welded.

[0039] When it is necessary to clamp the workpiece to be welded, the clamping cylinder 1 drives the clamping arm 2 to flip toward the workpiece to be welded, and makes the bottom of the floating rod 5 press against the surface of the workpiece to be welded, so as to clamp the workpiece to be welded and fix it on the welding platform. In the clamping state, the upper end of the floating rod 5 blocks the sensing end of the proximity switch 3, and the proximity switch 3 has a signal, indicating that the workpiece is clamped. On the contrary, when not clamped, the upper end of the floating rod 5 is below the sensing end of the proximity switch 3, and no obstruction is formed. At this time, the proximity switch 3 has no signal, indicating that the workpiece is not clamped.

[0040] like Figure 3As shown, in order to facilitate the installation of the proximity switch 3, a protrusion 201 is provided on the top of the pressure arm 2, and the proximity switch 3 passes through the protrusion 201 and is fixedly connected. The upper end of the floating rod 5 is provided on the side of the protrusion 201 away from the clamping cylinder 1. Specifically, a mounting hole is provided horizontally along the protrusion 201. The sensing end of the proximity switch 3 is fixed with a screw after passing through the mounting hole. The threaded end of the screw is screwed to the side of the protrusion 201 and against the surface of the proximity switch 3.

[0041] The heat shield 4 is made of metal or plastic, and a heat insulation coating is provided on its inner surface, such as a ceramic heat insulation layer, a silicate heat insulation layer, etc. Figure 3 As shown, a wiring hole 401 is provided on one end close to the clamping cylinder 1 for routing the cable of the proximity switch 3. During installation, the heat insulation cover 4 is inverted on the top of the pressure arm 2 and fixedly connected by a bolt. The threaded end of the bolt passes through the side end of the heat insulation cover 4 and is screwed to the pressure arm 2.

[0042] In the above structure, a through hole 202 is vertically provided on the upper side of the pressure arm 2. Figure 3 As shown, a floating rod 5 is slidably arranged in the through hole 202, wherein a first flange 501 is provided at the upper end of the floating rod 5, and the first flange 501 is arranged inside the heat insulation cover 4. The first flange 501 is used to prevent the floating rod 5 from escaping from the through hole 202 and is used to block the sensing end of the proximity switch 3.

[0043] In order to make the mechanism have better clamping ability, the mechanism also includes a pressure block 6, a compression spring 7 and a sleeve 8, wherein the pressure block 6 is fixed to the lower end of the floating rod 5, and the lower end of the pressure block 6 is provided with a second flange 601; the compression spring 7 is sleeved on the outside of the floating rod 5, the lower end of the compression spring 7 abuts the top of the pressure block 6, and the upper end abuts the bottom of the pressure arm 2; the sleeve 8 is sleeved on the outside of the compression spring 7, and the upper end of the sleeve 8 is fixedly connected to the bottom of the pressure arm 2; the upper end of the pressure block 6 is slidably set in the sleeve 8, and the top of the second flange 601 and the bottom of the sleeve 8 selectively abut each other.

[0044] In the clamping state, the bottom surface of the second flange 601 abuts against the surface of the workpiece to be welded, and the top surface of the second flange 601 abuts against the bottom end surface of the sleeve 8. At this time, the compression spring 7 is in a compressed and deformed state, and the first flange 501 at the upper end of the floating rod 5 is blocked at the sensing end of the proximity switch 3. In the non-clamping state, Figure 3 As shown, the compression spring 7 is relaxed, and the first flange 501 on the upper end of the floating rod 5 is below the sensing end of the proximity switch 3 without forming any obstruction. The compression spring 7 is mainly used for the rapid return of the floating rod 5.

[0045] In the above structure, the pressing block 6 can increase the clamping area and improve the clamping capacity of the mechanism. At the same time, the pressing block 6 is fixedly connected to the floating rod 5 by bolts, which facilitates the disassembly of the pressing block 6 and facilitates replacement when the bottom surface of the pressing block 6 is damaged.

[0046] The method of using the indirect detection clamping mechanism of the utility model is as follows:

[0047] The mechanism is fixed on the welding platform. After the welding workpiece is placed on the welding platform, the clamping cylinder 1 drives the clamping arm 2 to flip toward the workpiece to clamp the workpiece through the clamping block 6. After clamping, the first flange 501 blocks the sensing end of the proximity switch 3. The proximity switch 3 has a signal, indicating that the workpiece is clamped and subsequent welding operations can be carried out.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An indirect detection clamping mechanism, comprising a pressing cylinder (1), a pressing arm (2) and a proximity switch (3), wherein: One end of the pressing arm (2) is fixedly connected to the output end of the pressing cylinder (1), and the other end extends along a first preset direction and is fixedly connected to the proximity switch (3), wherein the first preset direction is a horizontal direction; It is characterized in that it also includes a heat shield (4) and a floating rod (5), wherein: The heat insulation cover (4) is fixed on the top of the pressure arm (2), and the proximity switch (3) is horizontally arranged inside the heat insulation cover (4); The floating rod (5) is arranged on the pressing arm (2) in a vertical sliding manner, the upper end of the floating rod (5) is arranged inside the heat insulation cover (4) and is used to shield the sensing end of the proximity switch (3), and the lower end is arranged below the pressing arm (2) and is used to support the workpiece to be welded.

2. The indirect detection clamping mechanism according to claim 1, wherein: The pressing cylinder (1) and the pressing arm (2) form a vertical flipping mechanism.

3. The indirect detection clamping mechanism according to claim 1, characterized in that: A protrusion (201) is provided on the top of the pressure arm (2), and the proximity switch (3) passes through the protrusion (201) and is fixedly connected.

4. The indirect detection clamping mechanism according to claim 3, wherein: The upper end of the floating rod (5) is arranged on a side of the protrusion (201) away from the pressing cylinder (1).

5. The indirect detection clamping mechanism according to claim 1, wherein: A heat insulation coating is provided on the inner surface of the heat insulation cover (4).

6. The indirect detection clamping mechanism according to claim 5, characterized in that: A wiring hole (401) is provided on one end of the heat insulation cover (4) close to the pressing cylinder (1).

7. The indirect detection clamping mechanism according to claim 1, characterized in that: The heat insulation cover (4) is buckled upside down on the top of the pressure arm (2) and fixedly connected by bolts.

8. The indirect detection clamping mechanism according to claim 1, characterized in that: A through hole (202) is vertically provided on the pressure arm (2), and the floating rod (5) is slidably provided in the through hole (202), wherein: The upper end of the floating rod (5) is provided with a first flange (501), and the first flange (501) is arranged inside the heat insulation cover (4).

9. The indirect detection clamping mechanism according to claim 8, characterized in that: It also includes a pressure block (6), a compression spring (7) and a sleeve (8), wherein: The pressing block (6) is fixed to the lower end of the floating rod (5), and the lower end of the pressing block (6) is provided with a second flange (601); The compression spring (7) is sleeved on the outside of the floating rod (5), the lower end of the compression spring (7) abuts against the top of the pressure block (6), and the upper end abuts against the bottom of the pressure arm (2); The sleeve (8) is sleeved on the outside of the compression spring (7), and the upper end of the sleeve (8) is fixedly connected to the bottom of the pressure arm (2); The upper end of the pressing block (6) is slidably arranged in the sleeve (8), and the top of the second flange (601) and the bottom of the sleeve (8) selectively abut against each other.

10. The indirect detection clamping mechanism according to claim 1, characterized in that: It also includes a fixed base (9), wherein the fixed base (9) is fixed to the side of the pressing cylinder (1).

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