Pneumatic swing arm grinding device

Abstract

The utility model discloses a pneumatic swing arm grinding device which comprises a machine frame, a hinged shaft is arranged on the machine frame, a swing arm capable of swinging is hinged to the machine frame through the hinged shaft, an air cylinder is hinged to the machine frame, the air cylinder is provided with an output end capable of stretching out and retracting back, the output end is hinged to the swing arm, and the swing arm is provided with a grinding device used for grinding an electrode cap. The swing arm is provided with a chip collecting device used for sucking metal chips generated when the electrode cap is ground by the grinding device, the rack is provided with a first limiting mechanism which abuts against the swing arm after the output end extends to a preset position, and the rack is provided with a second limiting mechanism which abuts against the swing arm after the output end retracts to the preset position. The first limiting mechanism plays a role in abutting against the swing arm so as to prevent the swing arm from swinging excessively and supporting the swing arm. The second limiting mechanism has the effects of abutting against the swing arm to prevent the swing arm from swinging excessively and supporting the swing arm, so that the position accuracy of the swing arm after swinging is guaranteed, and the service life of the air cylinder is further guaranteed.

Description

A pneumatic swing arm grinding tool Technical Field

[0001] This utility model relates to the technical field of electrode cap processing equipment, specifically to a pneumatic swing arm grinding device. Background Technology

[0002] During welding, the electrode caps on the welding torch wear down. A grinder is typically used to re-grind the electrode caps to maintain their performance, and a new electrode cap is usually replaced after multiple re-grinding cycles. Chinese utility model patent CN222113819U discloses a grinding device for welding torch electrode caps. In use, a swing arm, driven by a drive mechanism and an adjustment mechanism, enables the grinding mechanism to reciprocate along the swing arm. The inventors found that this grinding device, using a motor and reducer as the drive mechanism, has a high overall cost and is relatively heavy. Chinese utility model patent CN217413516U discloses a swing arm grinding device. The swing arm component drives the boom to a preset position near the electrode cap of the welding torch, where the grinding component re-grinds the electrode cap. The inventors discovered that while a pneumatic cylinder drives the swing arm to swing, which is more lightweight than using a motor and reducer as the power source, the swing arm needs to accurately reach the preset position after swinging. Otherwise, the electrode cap may deform or have uneven thickness after grinding, affecting subsequent welding operations. Therefore, there is an urgent need for a lightweight pneumatic swing arm grinding tool that ensures the accuracy of the swing arm's position after swinging. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a pneumatic swing arm grinder that is lightweight and ensures the positional accuracy of the swing arm after swinging.

[0004] To solve the above-mentioned technical problems, the utility model includes a frame, the frame having a hinge shaft, a swing arm hinged to the frame via the hinge shaft, a cylinder hinged to the frame, the cylinder having an output end that can extend and retract, the output end being hinged to the swing arm, the swing arm having a grinding device for grinding electrode caps, the swing arm having a chip collecting device for sucking up metal chips generated during the grinding of electrode caps by the grinding device, the frame having a first limiting mechanism that abuts against the swing arm after the output end extends to a preset position, and the frame having a second limiting mechanism that abuts against the swing arm after the output end retracts to a preset position.

[0005] With the above structure, the swing arm is driven by a cylinder, resulting in a lightweight design. The cylinder extends and retracts its output end to drive the swing arm to swing around the hinge axis. This swing adjusts the positions of the grinding and chip-collecting devices, allowing them to move closer to and further away from the electrode cap on the welding torch. When the grinding and chip-collecting devices are close to the electrode cap, they perform grinding and chip collection. After grinding, they move away from the electrode cap to prevent interference with the welding torch in subsequent operations. A first limiting mechanism is provided, allowing the swing arm to swing to a preset position when the output end extends to the preset position. This first limiting mechanism also supports the swing arm and prevents excessive swing. A second limiting mechanism is provided, allowing the swing arm to swing to a preset position when the output end retracts to the preset position. This second limiting mechanism also supports the swing arm and ensures accurate positioning of the swing arm after swinging, while also extending the cylinder's service life.

[0006] Furthermore, the first limiting mechanism includes a first mounting bracket fixed to the frame, a first screw threaded onto the first mounting bracket, a hollow first internal threaded sleeve threaded onto the first screw threaded onto the first screw threaded onto the first screw threaded onto the first screw threaded onto the first screw threaded onto the first internal threaded sleeve, one end of the first internal threaded sleeve being open and the other end being closed, the closed end of the first internal threaded sleeve having a first through hole, a first protrusion being clamped between the first screw threaded onto the closed end of the first internal threaded sleeve, the first protrusion including a first body located between the first screw threaded onto the closed end of the first internal threaded sleeve, the first body having a first abutment threaded onto the first through hole extending toward the swing arm, the swing arm having a first contact member, the first abutment threaded onto the first contact member connected to the swing arm having been driven to a preset position. By setting the first mounting bracket, the first screw threaded onto the first internal threaded sleeve, the first protrusion, and the first contact member, the first abutment threaded onto the first contact member connected to the swing arm achieves limiting and support of the swing arm, preventing the first abutment threaded onto the swing arm from directly contacting the swing arm and causing deformation of the swing arm. By screwing the first screw, the distance between the first internal threaded sleeve, the first protrusion, and the swing arm can be flexibly adjusted to adapt to actual operational needs. This prevents interference between the first abutment and the first contact member before the output end extends to the preset position, and also prevents the first abutment and the first contact member from making contact after the output end extends to the preset position. After prolonged use, the first internal threaded sleeve can be unscrewed from the first screw, allowing the first protrusion to be easily removed for maintenance or replacement by operators. This prevents deformation of the first abutment due to pressure from the first contact member during prolonged use, which could lead to inaccurate contact between the first abutment and the first contact member.

[0007] Furthermore, the swing arm is provided with a transition seat, which has a plurality of slots spaced apart along the swing direction of the swing arm. A first contact element is inserted into one of these slots, and the first contact element within the slot is connected to the transition seat by fasteners. By providing the transition seat and slots, the plurality of slots provide several secure mounting positions for the first contact element, further allowing for flexible adjustment of the distance between the first internal threaded sleeve, the first protrusion, the swing arm, and the first contact element, thus further adapting to actual operational needs.

[0008] Furthermore, the second limiting mechanism includes a second mounting bracket fixed to the frame, a second screw threaded onto the second mounting bracket, and a hollow second internal threaded sleeve threaded onto the second screw. One end of the second internal threaded sleeve is open and the other end is closed. The closed end of the second internal threaded sleeve has a second through hole. A second protrusion is held between the second screw and the closed end of the second internal threaded sleeve. The second protrusion includes a second body located between the second screw and the closed end of the second internal threaded sleeve. The second body is fixed with a second abutment extending through the second through hole toward the swing arm. The swing arm has a second contact member. The second abutment can abut against the second contact member on the swing arm, which swings to a preset position under the drive of the output end retracted to the preset position. By setting the second mounting bracket, the second screw, the second internal threaded sleeve, the second protrusion, and the second contact member, the second abutment abuts against the second contact member connected to the swing arm to achieve limiting and support of the swing arm, preventing the second abutment from directly contacting the swing arm and causing deformation. By screwing on the second screw, the distance between the second internal threaded sleeve, the second protrusion, and the swing arm can be flexibly adjusted to adapt to actual operational needs. This prevents interference between the second abutment and the second contact before the output end retracts to the preset position, and also prevents the second abutment and the second contact from failing to make contact after the output end has retracted to the preset position. After prolonged use, the second internal threaded sleeve can be unscrewed from the second screw, allowing the second protrusion to be easily removed for maintenance or replacement by operators. This prevents deformation of the second abutment due to pressure from the second contact under prolonged use, which could lead to inaccurate contact between the second abutment and the second contact.

[0009] Furthermore, the first mounting bracket is equipped with a first proximity sensor for detecting the contact state between the first abutment and the first contact member. The position of the first proximity sensor on the first mounting bracket is adjustable. By setting the first proximity sensor, the contact state between the first abutment and the first contact member is automatically detected, automatically detecting whether the first contact member has reached a preset position after the swing arm swings, eliminating the need for manual observation by operators and ensuring smooth operation. By adjusting the position of the first proximity sensor on the first mounting bracket to adapt to actual on-site processing needs, the position of the first proximity sensor can be adjusted according to actual processing requirements, ensuring the accuracy of the detection operation.

[0010] Furthermore, the first mounting bracket is provided with an inclined first slide rail, on which a first slider is slidably connected. The first proximity sensor is mounted on the first slider, and the first slider is locked in position on the first slide rail by fasteners. By sliding the first slider, the position of the first proximity sensor is changed by changing its position on the first slide rail. Finally, the first slider is locked in position on the first slide rail by fasteners, thus achieving position locking of the first slider.

[0011] Furthermore, the second mounting bracket is equipped with a second proximity sensor for detecting the contact state between the second abutment and the second contact member. The position of the second proximity sensor on the second mounting bracket is adjustable. By setting the second proximity sensor, the contact state between the second abutment and the second contact member is automatically detected. It automatically detects whether the second contact member reaches a preset position after the swing arm swings, eliminating the need for manual observation by operators and ensuring smooth operation. Adjusting the position of the second proximity sensor on the second mounting bracket adapts to actual on-site processing requirements, ensuring the accuracy of the detection operation.

[0012] Furthermore, the second mounting bracket is equipped with an inclined second slide rail, on which a second slider is slidably connected. The second proximity sensor is mounted on the second slider, and the second slider is locked in place on the second slide rail by fasteners. By sliding the second slider, the position of the second proximity sensor is changed, thereby changing the position of the second slider on the second slide rail. Finally, the second slider is locked in place on the second slide rail by fasteners, thus achieving position locking of the second slider.

[0013] Furthermore, the swing arm is equipped with a sliding frame, the position of which is adjustable. The grinding device and the chip collection device are mounted on the sliding frame. By setting the sliding frame, the position of the sliding frame changes, causing the positions of the grinding device and the chip collection device to change as well. The grinding device and the chip collection device adapt to various spacing and posture requirements of the electrode cap.

[0014] In summary, this utility model has the advantages of being easy to use and having a reasonable structure. Attached Figure Description

[0015] Figure 1 is a three-dimensional structural schematic diagram of this utility model;

[0016] Figure 2 is a magnified view of a portion of area A in Figure 1;

[0017] Figure 3 is a three-dimensional structural schematic diagram of this utility model from another angle;

[0018] Figure 4 is a magnified view of area B in Figure 3;

[0019] Figure 5 is a top view of the structure of this utility model;

[0020] Figure 6 is a top view of the structure of the first limiting mechanism and the first proximity sensor;

[0021] Figure 7 is a schematic diagram of the structure viewed in section along line CC in Figure 6;

[0022] Figure 8 is a three-dimensional structural schematic diagram of the first internal threaded sleeve;

[0023] Figure 9 is a three-dimensional structural schematic diagram of the first protrusion;

[0024] Figure 10 is a top view of the structure of the second limiting mechanism and the second proximity sensor;

[0025] Figure 11 is a schematic diagram of the structure viewed in section along line DD in Figure 10;

[0026] Figure 12 is a three-dimensional structural schematic diagram of the second internal threaded sleeve;

[0027] Figure 13 is a three-dimensional structural diagram of the second protrusion;

[0028] In the diagram: 1. Frame; 2. Hinge shaft; 3. Swing arm; 31. First contact element; 32. Transition seat; 321. Slot; 33. Second contact element; 34. Sliding frame; 4. Cylinder; 41. Output end; 5. Grinding device; 6. Chip collection device; 7. First limiting mechanism; 71. First mounting bracket; 711. First slide rail; 712. First slider; 72. First screw; 73. First internal threaded sleeve; 731. First through hole; 74. First protrusion; 741. First body; 742. First abutment; 8. Second limiting mechanism; 81. Second mounting bracket; 811. Second slide rail; 812. Second slider; 82. Second screw; 83. Second internal threaded sleeve; 831. Second through hole; 84. Second protrusion; 841. Second body; 842. Second abutment; 9. First proximity sensor; 10. Second proximity sensor. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention. For ease of understanding, the upper side of Figure 1 is the upper side of the present invention, the lower side of Figure 1 is the lower side of the present invention, the left side of Figure 5 is the left side of the present invention, the right side of Figure 5 is the right side of the present invention, the upper side of Figure 5 is the front side of the present invention, and the lower side of Figure 5 is the rear side of the present invention.

[0030] Referring to Figures 1 to 5, this utility model includes a frame 1, which has a hinge shaft 2. A swing arm 3 is hinged to the frame 1 via the hinge shaft 2. In this embodiment, the swing arm 3 swings back and forth around the hinge shaft 2. The frame 1 has two bearing seats, and the hinge shaft 2 is rotatably connected to the two bearing seats. The swing arm 3 is fixed to the hinge shaft 2, and the swing arm 3 drives the hinge shaft 2 to rotate when it swings. Alternatively, the hinge shaft 2 can be fixed to the frame 1, and the swing arm 3 can be loosely fitted to the hinge shaft 2. A cylinder 4 is hinged to the frame 1. The cylinder 4 has an output end 41 that can extend and retract, and the output end 41 is hinged to the swing arm 3. The swing arm 3 is equipped with a grinding device 5 for grinding electrode caps, and a chip collecting device 6 for collecting metal chips generated when the grinding device 5 grinds the electrode caps. The grinding device 5 and the chip collecting device 6 are common components in the field of electrode cap grinding, and their structural principles are well known to those skilled in the art, and will not be described in detail here.

[0031] Referring to Figures 1 to 9, the frame 1 is provided with a first limiting mechanism 7 that abuts against the swing arm 3 after the output end 41 extends to a preset position. In this embodiment, the output end 41 extending to the preset position causes the swing arm 3 to swing forward around the hinge axis 2 to the preset position, and the output end 41 retracting to the preset position causes the swing arm 3 to swing backward around the hinge axis 2 to the preset position. The extension and retraction amounts of the output end 41 are determined by the operator based on the actual processing conditions when selecting the cylinder 4. The first limiting mechanism 7 includes a first mounting bracket 71 fixed to the frame 1, a first screw 72 screwed onto the first mounting bracket 71, and a hollow first internal threaded sleeve 73 screwed onto the first screw 72. One end of the first internal threaded sleeve 73 is open and the other end is closed, and the closed end of the first internal threaded sleeve 73 is provided with a first through hole 731. A first protrusion 74 is held between the closed end of the first screw 72 and the first internal threaded sleeve 73. The first protrusion 74 includes a first body 741 located between the closed end of the first screw 72 and the first internal threaded sleeve 73. The first body 741 is fixedly connected to a first abutment 742 that passes through the first through hole 731 and extends toward the swing arm 3. The swing arm 3 is provided with a first contact member 31. The first abutment 742 can abut against the first contact member 31 when the swing arm 3 swings to the preset position under the drive of the output end 41 extending to the preset position. The first screw 72, the first internal threaded sleeve 73, and the first protrusion 74 are generally inclined upwards from front to back to reliably abut against the swing arm 3. The first contact member 31 is generally square plate-shaped.

[0032] The first abutment 742 abuts against the first contact member 31 connected to the swing arm 3, thereby limiting and supporting the swing arm 3 and preventing deformation of the swing arm 3 due to direct contact between the first abutment 742 and the swing arm 3. By turning the first screw 72, the distance between the first internal threaded sleeve 73, the first protrusion 74, and the swing arm 3 can be flexibly adjusted to adapt to actual operational needs, preventing interference between the first abutment 742 and the first contact member 31 before the output end 41 extends to the preset position, and preventing non-contact between the first abutment 742 and the first contact member 31 after the output end 41 extends to the preset position. After prolonged use, the first internal threaded sleeve 73 can be unscrewed from the first screw 72, allowing the first protrusion 74 to be easily removed for maintenance or replacement by operators. This prevents deformation of the first abutment 742 due to pressure from the first contact member 31 during prolonged use, which could lead to inaccurate contact between the first abutment 742 and the first contact member 31.

[0033] Referring to Figures 1 to 7, preferably, the swing arm 3 is provided with a transition seat 32. The transition seat 32 has a plurality of slots 321 spaced apart along the swing direction of the swing arm 3. The first contact member 31 is inserted into one of the slots 321. The first contact member 31 in the slot 321 is connected to the transition seat 32 by fasteners. Screws can be used as fasteners. The plurality of slots 321 provide the first contact member 31 with a plurality of secure mounting positions, further flexibly adjusting the distance between the first internal threaded sleeve 73, the first protrusion 74 and the swing arm 3 and the first contact member 31, further adapting to actual operating requirements. The first mounting bracket 71 is provided with a first proximity sensor 9 for detecting the contact state between the first abutment 742 and the first contact member 31. The position of the first proximity sensor 9 on the first mounting bracket 71 is adjustable. The transmitting end of the first proximity sensor 9 faces the first contact member 31 abutting behind the first abutment 742. When the first contact member 31 abuts the first abutment 742, the first proximity sensor 9 can send a signal to confirm that the output end 41 of the cylinder 4 has completed the command to extend to the preset position. By setting a first proximity sensor 9, the contact state between the first abutment 742 and the first contact member 31 is automatically detected. The system automatically detects whether the first contact member 31 reaches a preset position after the swing arm 3 swings, eliminating the need for manual observation by operators and ensuring smooth operation. The position of the first proximity sensor 9 on the first mounting bracket 71 can be adjusted to meet actual processing needs, ensuring the accuracy of the detection operation. The first mounting bracket 71 is equipped with an inclined first slide rail 711, with a first slider 712 slidably connected to it. The first proximity sensor 9 is mounted on the first slider 712, which is locked in place on the first slide rail 711 by fasteners. The first slide rail 711 is inclined upwards from front to back. The first slide rail 711 is approximately C-shaped with an upward opening, and the left and right sides of the top of the first slide rail 711 bend inwards. The first slider 712 includes a sensor mounting block abutting against the top surface of the first slide rail 711 and a sliding plate located within the first slide rail 711. The fastener can be a screw, with the screw head abutting against the sensor mounting block and the screw stud passing through the sensor mounting block and screwed onto the sliding plate. The screw locks the sensor mounting block and the sliding plate between the left and right sides of the top of the first slide rail 711. Alternatively, a screw and nut combination can be used as the fastener. When using a screw and nut combination, the screw passes through the first slider 712 and the first slide rail 711 before being screwed onto the nut. The first slide rail 711 has an elongated hole to avoid the screw. By sliding the first slider 712, the position of the first proximity sensor 9 is changed on the first slide rail 711, and finally, the first slider 712 is locked onto the first slide rail 711 using the fastener, thus locking the position of the first slider 712.

[0034] Referring to Figures 1 to 3 and Figures 10 to 13, the frame 1 is provided with a second limiting mechanism 8 that abuts against the swing arm 3 after the output end 41 retracts to a preset position. The second limiting mechanism 8 includes a second mounting bracket 81 fixed to the frame 1, and a second screw 82 is screwed onto the second mounting bracket 81. A hollow second internal threaded sleeve 83 is screwed onto the second screw 82. One end of the second internal threaded sleeve 83 is open and the other end is closed. The closed end of the second internal threaded sleeve 83 is provided with a second through hole 831. A second protrusion 84 is held between the second screw 82 and the closed end of the second internal threaded sleeve 83. The second protrusion 84 includes a second body 841 located between the second screw 82 and the closed end of the second internal threaded sleeve 83. The second body 841 is fixed with a second abutment 842 that passes through the second through hole 831 and extends toward the swing arm 3. The swing arm 3 is provided with a second contact member 33. The second abutment 842 can abut against the second contact member 33 on the swing arm 3 when it swings to the preset position under the drive of the output end 41 retracted to the preset position. The second abutment 842 abuts against the second contact member 33 connected to the swing arm 3 to limit and support the swing arm 3, and to prevent the second abutment 842 from directly contacting the swing arm 3 and causing deformation of the swing arm 3. By turning the second screw 82, the distance between the second internal thread sleeve 83, the second protrusion 84 and the swing arm 3 can be flexibly adjusted to adapt to actual operation requirements, and to prevent the second abutment 842 and the second contact member 33 from contacting each other before the output end 41 retracts to the preset position and causing mutual interference, and prevent the second abutment 842 and the second contact member 33 from not contacting each other after the output end 41 retracts to the preset position. After prolonged use, the second internal threaded sleeve 83 can be unscrewed from the second screw 82, allowing the second protrusion 84 to be easily removed. Then, the operator can repair or replace the second protrusion 84 to prevent deformation of the second abutment 842 due to pressure from the second contact member 33 during prolonged use, which could cause misalignment between the second abutment 842 and the second contact member 33. In this embodiment, the first abutment 742 abuts against the front side of the first contact member 31, and the second abutment 842 abuts against the rear side of the second contact member 33.

[0035] Referring to Figures 1 to 3 and Figures 10 to 13, the second mounting bracket 81 is equipped with a second proximity sensor 10 for detecting the contact state between the second abutment 842 and the second contact member 33. The position of the second proximity sensor 10 on the second mounting bracket 81 is adjustable. The transmitting end of the second proximity sensor 10 faces the second contact member 33 abutting behind the second abutment 842. When the second contact member 33 abuts the second abutment 842, the second proximity sensor 10 can send a signal to confirm that the output end 41 of the cylinder 4 has completed the command to retract to the preset position. By setting the second proximity sensor 10, the contact state between the second abutment 842 and the second contact member 33 is automatically detected, automatically detecting whether the second contact member 33 has reached the preset position after swinging with the swing arm 3, eliminating the need for manual observation by operators and ensuring smooth operation. By adjusting the position of the second proximity sensor 10 on the second mounting bracket 81 to adapt to the actual processing requirements on site, the position of the second proximity sensor 10 can be adjusted according to the actual processing requirements, ensuring the accuracy of the detection operation. The second mounting bracket 81 is provided with an inclined second slide rail 811, on which a second slider 812 is slidably connected. The second proximity sensor 10 is mounted on the second slider 812, and the second slider 812 is locked in place on the second slide rail 811 by fasteners. The second slide rail 811 and the second slider 812 can adopt the same structure as the first slide rail 711 and the first slider 712. The second slide rail 811 is inclined downwards from front to back. By sliding the second slider 812, the position of the second proximity sensor 10 is changed by changing the position of the second slider 812 on the second slide rail 811. Finally, the position of the second slider 812 is locked on the second slide rail 811 by fasteners, thus achieving position locking of the second slider 812.

[0036] Referring to Figures 1, 3, and 5, the swing arm 3 is equipped with a sliding frame 34. The position of the sliding frame 34 on the swing arm 3 is adjustable. The grinding device 5 and the chip collecting device 6 are mounted on the sliding frame 34. Changing the position of the sliding frame 34 causes changing the positions of the grinding device 5 and the chip collecting device 6, allowing them to adapt to various spacing and posture requirements of the electrode cap. Specifically, the swing arm 3 is equipped with a linear drive mechanism. The linear drive mechanism has a sliding end capable of left-right, up-down, or forward-backward translation. The linear drive mechanism can be a lead screw and nut mechanism, an electric push rod cylinder, or a pneumatic cylinder. The sliding frame 34 is connected to the sliding end of the linear drive mechanism, thereby achieving position adjustment of the sliding frame 34. The sliding frame 34 can be guided by linear bearings.

[0037] In use, this invention uses a cylinder 4 as a driving component to drive the swing arm 3, resulting in a lightweight design. The cylinder 4 drives the swing arm 3 to swing around the hinge shaft 2 by extending and retracting its output end 41. The swing arm 3 adjusts the position of the grinding device 5 and the chip collecting device 6, allowing them to approach and move away from the electrode cap on the welding torch. When the grinding device 5 and the chip collecting device 6 are close to the electrode cap, they perform grinding and chip collection on the cap. After grinding, the grinding device 5 and the chip collecting device 6 move away from the electrode cap to prevent interference with the welding torch in subsequent operations. By setting the first limiting mechanism 7, the swing arm 3 swings to the preset position under the drive of the output end 41 extended to the preset position. The first limiting mechanism 7 can resist the swing arm 3 to prevent excessive swinging. The first limiting mechanism 7 can also support the swing arm 3. By setting the second limiting mechanism 8, the swing arm 3 swings to the preset position under the drive of the output end 41 retracted to the preset position. The second limiting mechanism 8 can resist the swing arm 3 to prevent excessive swinging. The second limiting mechanism 8 can also support the swing arm 3, thereby ensuring the positional accuracy of the swing arm 3 after swinging and also ensuring the service life of the cylinder 4.

[0038] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the protection scope of this utility model.

Claims

1. A pneumatic swing arm grinding device, characterized in that: The device includes a frame (1), which is provided with a hinge (2). The frame (1) is hinged to a swing arm (3) that can swing through the hinge (2). The frame (1) is hinged to a cylinder (4). The cylinder (4) has an output end (41) that can extend and retract. The output end (41) is hinged to the swing arm (3). The swing arm (3) is provided with a grinding device (5) for grinding the electrode cap. The swing arm (3) is provided with a chip collection device (6) for sucking up the metal chips generated when the grinding device (5) grinds the electrode cap. The frame (1) is provided with a first limiting mechanism (7) that abuts the swing arm (3) after the output end (41) extends to a preset position. The frame (1) is provided with a second limiting mechanism (8) that abuts the swing arm (3) after the output end (41) retracts to a preset position.

2. The pneumatic swing arm grinder according to claim 1, characterized in that: The first limiting mechanism (7) includes a first mounting bracket (71) fixed to the frame (1), the first mounting bracket (71) being screwed with a first screw (72), the first screw (72) being screwed with a hollow first internal threaded sleeve (73), the first internal threaded sleeve (73) being open at one end and closed at the other end, the closed end of the first internal threaded sleeve (73) being provided with a first through hole (731), and a first protrusion (74) being clamped between the first screw (72) and the closed end of the first internal threaded sleeve (73). The first protrusion (74) includes a first body (741) located between the closed end of the first screw (72) and the first internal threaded sleeve (73). The first body (741) is fixedly connected to a first abutment (742) that passes through the first through hole (731) and extends toward the swing arm (3). The swing arm (3) is provided with a first contact (31). The first abutment (742) can abut against the first contact (31) on the swing arm (3) which swings to the preset position under the drive of the output end (41) that extends to the preset position.

3. The pneumatic swing arm grinder according to claim 2, characterized in that: The swing arm (3) is provided with a transition seat (32), and the transition seat (32) is provided with a number of slots (321) spaced apart along the swing direction of the swing arm (3). A first contact (31) is inserted into one of the slots (321), and the first contact (31) in the slot (321) is connected to the transition seat (32) by fasteners.

4. The pneumatic swing arm grinder according to claim 1, characterized in that: The second limiting mechanism (8) includes a second mounting bracket (81) fixed to the frame (1), the second mounting bracket (81) being screwed with a second screw (82), the second screw (82) being screwed with a hollow second internal threaded sleeve (83), the second internal threaded sleeve (83) being open at one end and closed at the other end, the closed end of the second internal threaded sleeve (83) being provided with a second through hole (831), and a second protrusion (84) being clamped between the second screw (82) and the closed end of the second internal threaded sleeve (83). The second protrusion (84) includes a second body (841) located between the closed end of the second screw (82) and the second internal threaded sleeve (83). The second body (841) is fixedly connected to a second abutment (842) that passes through the second through hole (831) and extends toward the swing arm (3). The swing arm (3) is provided with a second contact (33). The second abutment (842) can abut against the second contact (33) on the swing arm (3) that swings to the preset position under the drive of the output end (41) that has retracted to the preset position.

5. The pneumatic swing arm grinder according to claim 3, characterized in that: The first mounting bracket (71) is provided with a first proximity sensor (9) for detecting the contact state between the first abutment (742) and the first contact member (31), and the position of the first proximity sensor (9) on the first mounting bracket (71) is adjustable.

6. The pneumatic swing arm grinder according to claim 5, characterized in that: The first mounting bracket (71) is provided with an inclined first slide rail (711), and the first slide rail (711) is slidably connected to a first slider (712). The first proximity sensor (9) is located on the first slider (712), and the first slider (712) is locked in position on the first slide rail (711) by fasteners.

7. The pneumatic swing arm dresser of claim 4, wherein: The second mounting bracket (81) is provided with a second proximity sensor (10) for detecting the contact state between the second abutment (842) and the second contact (33), and the position of the second proximity sensor (10) on the second mounting bracket (81) is adjustable.

8. The pneumatic swing arm dresser of claim 7, wherein: The second mounting bracket (81) is provided with an inclined second slide rail (811), and the second slide rail (811) is slidably connected to a second slider (812). The second proximity sensor (10) is located on the second slider (812), and the second slider (812) is locked in position on the second slide rail (811) by fasteners.

9. The pneumatic swing arm grinder according to claim 1, characterized in that: The swing arm (3) is provided with a sliding frame (34), the position of the sliding frame (34) on the swing arm (3) can be adjusted, and the grinding device (5) and the chip collection device (6) are installed on the sliding frame (34).

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