A quick-change mounting structure for grinding head assembly

Abstract

This utility model relates to a quick-change installation structure for a grinding head assembly, including a grinding head assembly and a pneumatic grinding fixing device. The grinding head assembly consists of a grinding head support arm, a buffer block fixing block, an elastic buffer pad, and a sandpaper sheet. One end of the grinding head support arm is a straight arm, and the other end is a bent arm. Guide keys are provided opposite each other at the straight arm end, and radial positioning pin holes (hemispherical holes) are provided at a 90° angle to the two guide keys. One end of the pneumatic grinding fixing device is fixedly connected to the cantilever support rod of the grinding actuator, and the other end has an insertion hole with two guide keyways opposite each other on the hole wall. The two guide keyways are inserted into the two guide keys on the grinding head support arm. Two mounting cavities are provided opposite each other at a 90° angle to the two guide keyways at the other end of the pneumatic grinding fixing device. Each mounting cavity contains a set of elastic locking and unlocking components, and the two sets of elastic locking and unlocking components are respectively inserted into the two radial positioning pin holes on the grinding head support arm through a locking and unlocking pin. This structure has the advantages of convenient operation and stable reliability.

Description

Technical Field

[0001] This utility model belongs to the field of grinding structure technology, and in particular relates to a quick-change installation structure for a grinding head assembly. Background Technology

[0002] Currently, when using force-controlled grinding equipment to process the inner walls of irregularly shaped, multi-curved surfaces, the grinding actuators generally include a quick-change disc 1 (comprising a first disc body 1.1 and a second disc body 1.2 connected to each other), a force-controlled actuator 3, a cantilever support rod 5, a pneumatic grinding fixing device 6, and a grinding head assembly 7. The quick-change disc is connected to the output end of the grinding robot. The back of the housing of the force-controlled actuator is fixedly connected to the connecting side of the quick-change disc via a connector 2. The force control output end of the force-controlled actuator is vertically fixedly connected to one end of the cantilever support rod via a rod frame 4. The other end of the cantilever support rod is fixed to one end 6.1 of the pneumatic grinding fixing device. The other end 6.2 of the pneumatic grinding fixing device is the power output end, which is connected to the grinding head assembly. The grinding head assembly consists of a grinding head support arm and sandpaper installed at the end of the grinding head support arm.

[0003] Currently, the grinding head assembly and the pneumatic grinding fixing device are connected by a plug-in spline, and the grinding head assembly and the pneumatic grinding fixing device are fixed by radial fastening screws.

[0004] When grinding workpieces, the sandpaper wears down, requiring frequent replacement of the grinding head assembly. The connection method between the grinding head assembly and the pneumatic grinding fixing device necessitates repeated disassembly and tightening of the bolts, resulting in low replacement efficiency for the grinding head assembly. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes a quick-change installation structure for grinding head components that is convenient and easy to operate.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0007] A quick-change installation structure for a grinding head assembly includes a grinding head assembly 7 and a pneumatic grinding fixing device 6. The grinding head assembly consists of a grinding head support arm, a buffer block fixing block, an elastic buffer pad, and a sandpaper sheet; one end of the grinding head support arm is a straight arm end, and the other end is a bent arm end; two radially protruding guide keys are arranged opposite each other at the straight arm end, and a radial positioning pin hole is provided at a 90° angle to the two guide keys on the support arm end, the positioning pin hole being a hemispherical hole;

[0008] One end of the pneumatic grinding fixing device is fixedly connected to the cantilever support rod of the grinding actuator. The other end of the pneumatic grinding fixing device is provided with an insertion hole. Two guide keyways are provided opposite to each other on the hole wall of the insertion hole. The two guide keyways are inserted and matched with two guide flat keys on the grinding head support arm.

[0009] Two mounting cavities are provided at the other end of the pneumatic grinding fixing device at a 90° angle to the two guide keyways. The two mounting cavities are connected to the insertion hole. Each mounting cavity is provided with a set of elastic locking and unlocking components. The two sets of elastic locking and unlocking components are respectively inserted into two radial positioning pin holes on the grinding head support arm through a locking and unlocking pin. The grinding head support arm and the pneumatic grinding fixing device form an axial limiting fit.

[0010] The buffer block fixing block is vertically and fixedly connected to the bent arm end of the grinding head support arm, and the sandpaper is fixedly connected to the buffer block fixing block through an elastic buffer pad.

[0011] Furthermore, a spring support platform is provided near one end of each of the two mounting cavities, and a cavity cover is fixed to the outer end of each of the two mounting cavities. A through hole is provided near one end of the cavity cover, and a pressing recess is provided around the through hole.

[0012] Each set of elastic locking components also includes a locking / unlocking swing arm, a first compression spring, a second compression spring, and a locking / unlocking contact. A support shaft is vertically mounted in the middle of the locking / unlocking swing arm, rotatably. Both ends of the support shaft are fixed to shaft holes on opposite sidewalls of the corresponding mounting cavity, forming the swing center of the locking / unlocking swing arm. The locking / unlocking contact is vertically fixed to one outer end of the locking / unlocking swing arm and aligned with a through hole on the cavity cover. A first compression spring is installed on the inner side of the locking / unlocking swing arm, opposite the locking / unlocking contact, via a first spring guide post. The inner end of the first compression spring is pressed against the spring support platform in the corresponding mounting cavity. The locking / unlocking post is vertically fixed to the other inner end of the locking / unlocking swing arm. The inner end of the locking / unlocking post has a hemispherical structure. A second compression spring is installed on the outer side of the locking / unlocking swing arm, opposite the locking / unlocking post, via a protruding second spring guide post. The outer end of the second compression spring is pressed against the interior of the cavity cover outside the corresponding mounting cavity.

[0013] Furthermore, the buffer block fixing block is made of square nylon, the upper end of the elastic buffer pad is connected to the lower end of the buffer block fixing block by hook and loop fastener, and the lower end of the elastic buffer pad is connected to the back of the base of the sandpaper by hook and loop fastener.

[0014] The advantages and positive effects of this utility model are as follows:

[0015] This invention employs a quick-change installation structure for the grinding head assembly, allowing for easy disassembly and replacement with a simple manual pressing motion. Compared to existing screw-based fastening methods, this significantly improves replacement efficiency. Furthermore, the current method of repeatedly disassembling and tightening screws requires careful control of the tightening force and direction; improper control can lead to issues such as screw damage, affecting the secure hold of the grinding head assembly. This invention, however, utilizes the force balance of two compression springs to secure the grinding head assembly, offering the advantage of long-term stable and reliable operation. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the existing grinding actuator;

[0017] Figure 2 This is a cross-sectional view of the quick-change installation structure of the grinding head assembly of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of a portion at point A;

[0019] Figure 4 yes Figure 2 A magnified view of section B;

[0020] Figure 5 This is a schematic diagram showing the connection of the grinding head support arm, buffer block fixing block, elastic buffer pad block, and sandpaper sheet of this utility model. Detailed Implementation

[0021] The structure of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0022] For a quick-change mounting structure for a grinding head assembly, please refer to [link / reference]. Figures 1-5 The invention comprises a grinding head assembly and a pneumatic grinding fixing device. The grinding head assembly consists of a grinding head support arm 7.1, a buffer block fixing block 7.2, an elastic buffer pad 7.3, and a sandpaper disc 7.4. One end of the grinding head support arm is a straight arm, and the other end is a curved arm. Two radially protruding guide keys (not shown in the attached drawings) are arranged opposite each other at the straight arm end, and a radial positioning pin hole 7.1.1 is provided at a 90° angle between the support arm end and the two guide keys. The positioning pin hole is a hemispherical hole. A buffer block fixing block is vertically fixed to the curved arm end of the grinding head support arm. The buffer block fixing block is a square nylon block. The upper end of the elastic buffer pad is fixed to the lower end of the buffer block fixing block, and the lower end of the elastic buffer pad is fixedly connected to the back of the sandpaper disc's substrate.

[0023] In this utility model, to facilitate the replacement of the elastic buffer pad and the sandpaper, the upper end of the elastic buffer pad is connected to the lower end of the buffer block fixing block by hook and loop fastener, and the lower end of the elastic buffer pad is connected to the back of the base of the sandpaper by hook and loop fastener.

[0024] One end of the pneumatic grinding fixing device is fixedly connected to the cantilever support rod of the grinding actuator. The other end of the pneumatic grinding fixing device (which is the output end of the drive wheel) is provided with a socket. The diameter of the socket matches the outer diameter of the straight arm end of the grinding head support arm. Two guide keyways are provided opposite to each other on the wall of the socket. The width of the two guide keyways matches the width of the two guide flat keys. The two guide keyways cooperate with the two guide flat keys on the grinding head support arm to realize the circumferential limiting cooperation between the pneumatic grinding fixing device and the grinding head assembly. This enables the pneumatic grinding fixing device to drive the grinding head assembly to move in order to perform the grinding action.

[0025] Two mounting cavities 6.2.1 are arranged opposite each other at a 90° angle to the two guide keyways at the other end of the pneumatic grinding fixing device. Both mounting cavities communicate with the insertion hole, and a spring-loaded support platform 6.2.2 is provided near one end of each mounting cavity. A set of elastic locking and unlocking components is provided in each mounting cavity to axially limit the straight arm end of the grinding head support after it is inserted into the insertion hole of the pneumatic grinding fixing device. A cavity cover 14 is fixed to the outer end of each of the two mounting cavities by screws or other means, and a through hole 14.2 is provided near one end of the cavity cover. A pressing recess 14.1 is provided around the through hole.

[0026] Each set of elastic locking components includes a locking / unlocking swing arm 10, a first compression spring 8, a second compression spring 13, a locking / unlocking contact 9, and a locking / unlocking post 12. A support shaft 11 is vertically mounted through the middle of the locking / unlocking swing arm, allowing relative rotation. Both ends of the support shaft are fixed to shaft holes on opposite sidewalls of the corresponding mounting cavity. The support shaft forms the swing center of the locking / unlocking swing arm. The locking / unlocking contact is vertically fixed to one outer end of the locking / unlocking swing arm and aligned with a through hole on the cavity cover. A first compression spring is mounted on the inner side of the locking / unlocking swing arm, opposite the locking / unlocking contact, via a protruding first spring guide post. The inner end of the first compression spring is pressed against the spring support platform in the corresponding mounting cavity. The locking / unlocking post is vertically fixed to the other inner end of the locking / unlocking swing arm. The inner end of the locking / unlocking post has a hemispherical structure. A second compression spring is mounted on the outer side of the locking / unlocking swing arm, opposite the locking / unlocking post, via a protruding second spring guide post. The outer end of the second compression spring is pressed against the interior of the cavity cover outside the corresponding mounting cavity.

[0027] Using the above-mentioned elastic locking assembly, when the locking and unlocking column is not under force, the locking and unlocking swing arm is in a state of force balance under the action of the first and second compression springs on both sides. At this time, the locking and unlocking swing arm is parallel to the axis of the above-mentioned insertion hole. In this state, the outer end of the locking and unlocking contact extends out from the through hole on the corresponding cavity cover, and the inner end of the locking and unlocking column extends radially into the insertion hole and corresponds to the radial positioning pin hole after the grinding head support arm is inserted into the pneumatic grinding fixing device. This realizes the axial limitation of the grinding head assembly through the insertion and cooperation of the radial positioning pin hole and the locking and unlocking column.

[0028] When it is necessary to disassemble and replace the grinding head assembly, manually press the outer ends of the locking contacts on both sides. The locking arm rotates around the support shaft, causing the inner end of the locking pin to slide out from the radial locating pin hole on the grinding head support arm, releasing the axial restriction on the grinding head assembly. At this time, the grinding head assembly can be pulled outward to achieve quick disassembly. When installing a new grinding head assembly, it can be directly inserted. When the inner end of the locking pin slides to the radial locating pin hole, the axial phase of the grinding head assembly is automatically achieved.

[0029] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A quick-change mounting structure for a grinding head assembly, characterized in that: It includes a grinding head assembly and a pneumatic grinding fixing device; the grinding head assembly consists of a grinding head support arm, a buffer block fixing block, an elastic buffer pad block, and a sandpaper sheet; one end of the grinding head support arm is a straight arm end and the other end is a bent arm end; two radially protruding guide keys are arranged opposite each other at the straight arm end, and a radial positioning pin hole is provided at a position at a 90° angle with the two guide keys on the support arm end, the positioning pin hole is a hemispherical hole; One end of the pneumatic grinding fixing device is fixedly connected to the cantilever support rod of the grinding actuator. The other end of the pneumatic grinding fixing device is provided with an insertion hole. Two guide keyways are provided opposite to each other on the hole wall of the insertion hole. The two guide keyways are inserted and matched with two guide flat keys on the grinding head support arm. Two mounting cavities are provided at the other end of the pneumatic grinding fixing device at a 90° angle to the two guide keyways. The two mounting cavities are connected to the insertion hole. Each mounting cavity is provided with a set of elastic locking and unlocking components. The two sets of elastic locking and unlocking components are respectively inserted into two radial positioning pin holes on the grinding head support arm through a locking and unlocking pin. The grinding head support arm and the pneumatic grinding fixing device form an axial limiting fit. The buffer block fixing block is vertically and fixedly connected to the bent arm end of the grinding head support arm, and the sandpaper is fixedly connected to the buffer block fixing block through an elastic buffer pad.

2. The quick-change installation structure for the grinding head assembly according to claim 1, characterized in that: A spring support platform is provided near one end of each of the two mounting cavities. A cavity cover is fixed to the outer end of each of the two mounting cavities, and a through hole is provided near one end of the cavity cover. A pressing recess is provided around the through hole. Each set of elastic locking components also includes a locking / unlocking swing arm, a first compression spring, a second compression spring, and a locking / unlocking contact. A support shaft is vertically mounted in the middle of the locking / unlocking swing arm, rotatably. Both ends of the support shaft are fixed to shaft holes on opposite sidewalls of the corresponding mounting cavity, forming the swing center of the locking / unlocking swing arm. The locking / unlocking contact is vertically fixed to one outer end of the locking / unlocking swing arm and aligned with a through hole on the cavity cover. A first compression spring is installed on the inner side of the locking / unlocking swing arm, opposite the locking / unlocking contact, via a first spring guide post. The inner end of the first compression spring is pressed against the spring support platform in the corresponding mounting cavity. The locking / unlocking post is vertically fixed to the other inner end of the locking / unlocking swing arm. The inner end of the locking / unlocking post has a hemispherical structure. A second compression spring is installed on the outer side of the locking / unlocking swing arm, opposite the locking / unlocking post, via a protruding second spring guide post. The outer end of the second compression spring is pressed against the interior of the cavity cover outside the corresponding mounting cavity.

3. The quick-change installation structure for the grinding head assembly according to claim 1, characterized in that: The buffer block fixing block is a square nylon block. The upper end of the elastic buffer pad is connected to the lower end of the buffer block fixing block by hook and loop fastener. The lower end of the elastic buffer pad is connected to the back of the base of the sandpaper by hook and loop fastener.

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