A nut hole deburring elastic brush adjusting device and method

Abstract

The present application belongs to the technical field of nut deburring processing, and particularly relates to a nut inner hole deburring elastic brush adjusting device and method, which comprises a mounting frame, the lower end of the mounting frame is provided with two synchronous electric hydraulic cylinder bodies, and the lower ends of the two synchronous electric hydraulic cylinder bodies are fixedly connected to the upper end of a supporting horizontal plate. The synchronous electric hydraulic cylinder body is arranged to drive the supporting horizontal plate to ascend and descend, and the T-shaped guide rod and the L-shaped guide sliding plate are matched with the guide structure, so that the axial height of the overall burr brush roller can be stably adjusted, the clamping positions of different nuts can be adapted, and meanwhile, the linkage structure such as the synchronous electric push rod body, the rotating connection ring, the push-pull rod and the hinged plate can drive the four connecting blocks to synchronously slide centripetally or centrifugally in the four sliding through grooves in the inner part of the circular plate, so that the radial distribution circle diameter of the burr brush roller can be accurately controlled.

Description

Technical Field

[0001] This invention belongs to the technical field of nut deburring, specifically relating to an elastic brush adjustment device and method for deburring the inner hole of a nut. Background Technology

[0002] In the fields of mechanical manufacturing and fastener processing, nuts are standard connecting parts, and the quality of their inner hole threads directly affects the assembly accuracy and connection strength. During the cutting or extrusion molding process of nuts, irregular burrs are easily generated on the inner hole end face and thread tips. If these burrs are not completely removed, they will not only cause jamming and damage to the mating surfaces when the threads are screwed on, but may also fall off during subsequent use, contaminating the hydraulic or pneumatic system and causing serious safety hazards.

[0003] Problems with existing technology:

[0004] 1. The spacing and overall height of the burr brush rollers in traditional brush roller devices are mostly fixed, making it difficult to adjust flexibly according to the inner diameter of the nut to be processed and the axial position of the nut. When processing nuts of different specifications, it is often necessary to stop the machine to replace the corresponding brush roller tooling or adjust the equipment layout. The operation is cumbersome and inefficient, which seriously restricts the flexible processing capability of the production line.

[0005] 2. Most existing equipment uses a unidirectional continuous rotation method for deburring. This method easily causes the removed metal debris to become embedded in the threaded gaps of the nut's inner hole under centrifugal force or gravity, making it difficult to remove. This necessitates additional manual blowing or cleaning processes, which not only increases production costs but also affects the surface quality of the inner thread and the accuracy of subsequent assembly. Summary of the Invention

[0006] The purpose of this invention is to provide an elastic brush adjustment device and method for deburring the inner hole of nuts. This invention solves the problem that the spacing and overall height of the deburring brush rollers in traditional brush roller devices are mostly fixed, making it difficult to flexibly adjust them according to the inner diameter of the nut to be processed and the axial position of the nut. When processing nuts of different specifications, it is often necessary to stop the machine to replace the corresponding brush roller tooling or adjust the equipment layout. This is cumbersome, inefficient, and seriously restricts the flexible processing capability of the production line.

[0007] The specific technical solution adopted by this invention is as follows:

[0008] A flexible brush adjustment device for deburring the inner hole of a nut includes a mounting frame. Two synchronous electric hydraulic cylinder bodies are mounted on the lower end of the mounting frame. The lower ends of the two synchronous electric hydraulic cylinder bodies are fixedly connected to the upper end of a support plate. A circular rotating disk is movably connected to the support plate through connecting holes inside it. A connecting assembly is mounted on the lower end of the circular rotating disk. Four evenly distributed deburring brush rollers are mounted on the lower end of the connecting assembly. An adjustment assembly is mounted on the upper end of the support plate. The lower end of the adjustment assembly passes through two sliding through holes inside the circular rotating disk and is connected to the connecting assembly. The lower side of the adjustment assembly is connected to the circular rotating disk.

[0009] Several rolling balls are provided at the connection between the support plate and the circular rotating disk. Two L-shaped guide slides are fixedly connected to the upper left and right sides of the support plate. The four L-shaped guide slides are slidably connected to four T-shaped guide rods through guide holes opened inside their upper ends. The upper ends of the four T-shaped guide rods are fixedly connected to the lower end of the mounting frame.

[0010] The adjustment assembly includes a concave frame, the lower end of which is fixedly connected to the upper end of a support cross plate. A motor is fixedly installed at the upper end of the concave frame. The output shaft of the motor is fixedly connected to a disc. A push rod is fixedly connected to the front end of the disc away from the axis. The push rod is movably connected to a T-shaped push-pull block with a push groove inside at the rear end. A meshing toothed plate is fixedly connected to the front end of the T-shaped push-pull block. The meshing toothed plate meshes with a meshing gear. The meshing gear is fixedly connected to the upper end of a rotating shaft.

[0011] The upper side of the rotating shaft is movably connected to the upper end of the concave frame, and the lower side of the rotating shaft is movably connected to a concave plate. The lower end of the concave plate is fixedly connected to the upper end of the supporting horizontal plate. The lower end of the rotating shaft is fixedly connected to a circular rotating disk. The upper and lower ends of the T-shaped push-pull block are both fixedly connected to supporting sliders. The two supporting sliders are slidably connected to two limiting rods. The left and right ends of the two limiting rods are fixedly connected to the relatively close ends of the two fixed plates. The lower ends of the two fixed plates are both fixedly connected to the upper end of the concave frame.

[0012] Two synchronous electric push rod bodies are fixedly installed at the upper end of the concave frame. The lower ends of the two synchronous electric push rod bodies are fixedly connected to a rotating connecting ring. The rotating connecting ring is movably connected to an annular rotating plate through a rotating connecting groove opened inside it. Several rolling balls are provided at the connection between the annular rotating plate and the rotating connecting ring. Two push-pull rods are fixedly connected to the lower end of the annular rotating plate. The lower ends of the two push-pull rods pass through two sliding through holes opened inside the circular rotating disk and are connected to the connecting assembly. Restricting slide plates are fixedly connected to both ends of the rotating connecting ring. The two restricting slide plates are slidably connected to two restricting rods. The upper ends of the two restricting rods are fixedly connected to the concave frame, and the lower ends of the two restricting rods are fixedly connected to the supporting cross plate.

[0013] The connecting assembly includes a second circular plate, the upper end of which is fixedly connected to the lower ends of two push-pull rods. The second circular plate is slidably connected to four fixed rods through four evenly spaced through holes inside. The upper ends of the four fixed rods are fixedly connected to a circular rotating disk, and the lower ends of the four fixed rods are fixedly connected to the upper end of a first circular plate. The first circular plate is slidably connected to four connecting blocks through four evenly spaced sliding through slots inside. A burr brush roller is fixedly installed at the lower end of each of the four connecting blocks.

[0014] Each of the four connecting blocks is movably connected to one end of one of the four hinge plates via a hinge shaft at its upper end. The other end of each of the four hinge plates is connected to a circular plate with four hinge seats at its lower end. Each of the four connecting blocks is slidably connected to one of the four limiting rod groups via a group of limiting holes inside. Each of the four limiting rod groups is fixedly connected inside the four sliding through slots.

[0015] A method for using an elastic brush adjustment device for deburring the inner hole of a nut includes the following steps:

[0016] a1. First, fix the nut to be processed on the worktable. Start the two synchronous electric hydraulic cylinders. The electric hydraulic cylinders push the support plate and move it smoothly downward along the T-shaped guide rod through the L-shaped guide slide. This drives the circular rotating disk, connecting components, and four burr brush rollers to descend as a whole until the lower end of the burr brush rollers extends into the inner hole of the nut to be processed. Adjust the processing depth according to the axial thickness of the nut. Then, according to the inner hole diameter of the nut to be processed, start the two synchronous electric push rods. The electric push rods push the rotating connecting ring and the annular rotating plate downward, so that the two push-pull rods pass through the sliding through hole and press down the second circular plate. The second circular plate is closer to the first circular plate. Through the hinge plate, the four connecting blocks slide synchronously along the sliding through groove of the first circular plate under the guidance of the limiting rod group. This drives the four burr brush rollers to move synchronously until the outer wall of the four burr brush rollers is tightly attached to the processing surface of the inner hole of the nut.

[0017] a2. After the above adjustments are completed, start the motor in the adjustment assembly. The motor output shaft drives the disc to rotate. The push rod on the disc slides in the push groove, driving the T-shaped push-pull block and the meshing tooth plate to perform reciprocating linear motion. The meshing tooth plate drives the meshing gear to rotate alternately in the forward and reverse directions. The reciprocating torque is transmitted to the circular rotating disc through the rotating shaft. The circular rotating disc rotates with low friction with the assistance of the first rolling ball. The fixed rod drives the first circular plate and four burr brush rollers to perform high-frequency reciprocating rotation grinding on the inner wall of the nut until the burrs are completely removed.

[0018] The technical effects achieved by this invention are as follows:

[0019] 1. This invention utilizes a synchronous electric hydraulic cylinder to drive the lifting and lowering of a support plate. Combined with a T-shaped guide rod and an L-shaped guide slide, this allows for stable adjustment of the overall axial height of the burr brush roller, adapting to different nut clamping positions. Simultaneously, through a linkage structure including a synchronous electric push rod, rotating connecting ring, push-pull rod, and hinge plate, four connecting blocks can be driven to slide synchronously inward or outward within four sliding through-grooves inside a circular plate. This precisely controls the radial distribution diameter of the burr brush roller. Through this bidirectional axial and radial adjustment linkage, the device can quickly and accurately adapt to nuts with different inner hole sizes and installation heights without replacing any parts, greatly improving the equipment's versatility and processing efficiency.

[0020] 2. This invention adjusts the motor-driven disc and push rod in the assembly to drive the meshing gear plate to move back and forth, thereby causing the meshing gear to drive the rotating shaft and the circular rotating disc to rotate in both directions. The reciprocating rotation of the circular rotating disc enables the four burr brush rollers to perform high-frequency reciprocating grinding on the inner wall of the nut, effectively preventing the phenomenon of debris being squeezed into the gap along the thread direction during unidirectional rotation, significantly improving the cleanliness of the inner thread. Furthermore, rolling balls are provided at the connection between the support plate and the circular rotating disc, and at the connection between the annular rotating plate and the rotating connecting ring, effectively reducing the sliding friction during the relative movement of the components, reducing energy loss, and extending the service life of the equipment under long-term reciprocating working conditions. Attached Figure Description

[0021] Figure 1 This is a front-view stereoscopic structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure in the front cross-section of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the main cross-section of the supporting horizontal plate in this invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the adjustment component in this invention, shown in the front cross-section.

[0025] Figure 5 This is a right-view stereoscopic structural diagram of the adjustment component in this invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the connecting component in this invention, shown in the front cross-section.

[0027] Figure 7 This is a front-view three-dimensional structural diagram of the connecting component in this invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Mounting bracket; 2. T-shaped guide rod; 3. Synchronous electric hydraulic cylinder body; 4. Adjustment assembly; 41. Concave frame; 42. Limiting rod one; 43. Push-pull rod; 44. Limiting slide plate; 45. Rolling ball two; 46. Synchronous electric push rod body; 47. Fixing plate; 48. Meshing toothed plate; 49. Limiting rod two; 410. Disc; 411. Support slider; 412. Meshing gear; 413. Rotating shaft; 414. Concave plate; 415. T-shaped push rod 416. Pull block; 417. Motor; 418. Push rod; 419. Annular rotating plate; 410. Rotating connecting ring; 5. L-shaped guide slide plate; 6. Circular rotating disk; 7. Supporting horizontal plate; 8. Connecting assembly; 81. Circular plate one; 82. Limiting rod group; 83. Sliding through groove; 84. Connecting block; 85. Hinge plate; 86. Hinge seat; 87. Circular plate two; 88. Fixing rod; 9. Burr brush roller; 10. Rolling ball one; 11. Sliding through hole. Detailed Implementation

[0030] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0031] like Figure 1-7As shown, an elastic brush adjustment device for deburring the inner hole of a nut includes a mounting frame 1. Two synchronous electric hydraulic cylinder bodies 3 are mounted on the lower end of the mounting frame 1. The lower ends of the two synchronous electric hydraulic cylinder bodies 3 are fixedly connected to the upper end of a support plate 7. A circular rotating disk 6 is movably connected to the support plate 7 through connecting holes inside it. A connecting assembly 8 is mounted on the lower end of the circular rotating disk 6. Four evenly distributed deburring brush rollers 9 are mounted on the lower end of the connecting assembly 8. An adjustment assembly 4 is mounted on the upper end of the support plate 7. The lower end of the adjustment assembly 4 passes through two sliding through holes 11 inside the circular rotating disk 6 and is connected to the connecting assembly 8. The lower side of component 4 is connected to the circular rotating disk 6. The main body 3 of the synchronous electric hydraulic cylinder drives the support plate 7 to move downward. In turn, with the cooperation of the circular rotating disk 6 and the connecting component 8, the four burr brush rollers 9 can be moved downward. The position height of the four burr brush rollers 9 can be adjusted according to the different heights of the nuts to be processed. With the cooperation of the adjusting component 4 and the connecting component 8, the four burr brush rollers 9 can be driven to move synchronously closer to or further away from each other according to the different inner holes of the nuts to be processed. This allows the device to adapt to nuts with different inner holes and expands its application range.

[0032] Furthermore, several rolling balls 10 are provided at the connection between the supporting horizontal plate 7 and the circular rotating disk 6. Two L-shaped guide slide plates 5 are fixedly connected to the upper left and right sides of the supporting horizontal plate 7. The four L-shaped guide slide plates 5 are slidably connected to the four T-shaped guide rods 2 through the guide holes opened inside their upper ends. The upper ends of the four T-shaped guide rods 2 are fixedly connected to the lower end of the mounting frame 1. The cooperation of the L-shaped guide slide plates 5 and the T-shaped guide rods 2 can increase the stability of the supporting horizontal plate 7 during the up and down movement. The rolling balls 10 can effectively reduce the friction between the circular rotating disk 6 and the supporting horizontal plate 7 during the rotation, thus extending the service life of the device.

[0033] Furthermore, the adjusting component 4 includes a concave frame 41, the lower end of which is fixedly connected to the upper end of the supporting cross plate 7. A motor 416 is fixedly mounted on the upper end of the concave frame 41. The output shaft of the motor 416 is fixedly connected to the disc 410. A push rod 417 is fixedly connected to the front end of the disc 410 away from the axis. The push rod 417 is movably connected to a T-shaped push-pull block 415 with a push groove inside at its rear end. A meshing toothed plate 48 is fixedly connected to the front end of the T-shaped push-pull block 415. The meshing toothed plate 48 and... The meshing gear 412 is engaged and fixedly connected to the upper end of the rotating shaft 413. The upper side of the rotating shaft 413 is movably connected to the upper end of the concave frame 41. A concave plate 414 is movably connected to the lower side of the rotating shaft 413. The lower end of the concave plate 414 is fixedly connected to the upper end of the supporting horizontal plate 7. The lower end of the rotating shaft 413 is fixedly connected to the circular rotating disk 6. Support sliders 411 are fixedly connected to both the upper and lower ends of the T-shaped push-pull block 415. The two support sliders 411 slide with the two limiting rods 49 respectively. The two limiting rods 49 are fixedly connected to the relatively close ends of the two fixed plates 47 at their respective ends. The lower ends of the two fixed plates 47 are fixedly connected to the upper end of the concave frame 41. The rotation of the output shaft of the motor 416 drives the disc 410 to rotate. In turn, with the cooperation of the push rod 417, the support slider 411, the limiting rods 49 and the fixed plates 47, the T-shaped push-pull block 415 can be driven to reciprocate in the left and right directions. During the reciprocating motion of the T-shaped push-pull block 415, with the cooperation of the meshing tooth plate 48, the meshing gear 412 and the rotating shaft 413, the circular rotating disk 6 can be driven to reciprocate. With the cooperation of the connecting component 8, the rotation of the circular rotating disk 6 can drive the four burr brush rollers 9 to reciprocate, thereby cleaning the burrs in the inner hole of the nut. The reciprocating rotation of the four burr brush rollers 9 can effectively reduce the situation where the cleaned burr debris is easily left in the thread gap in the inner hole of the nut.

[0034] Two synchronous electric push rod bodies 46 are fixedly installed at the upper end of the concave frame 41. The lower ends of the two synchronous electric push rod bodies 46 are fixedly connected to the rotating connecting ring 419. The rotating connecting ring 419 is movably connected to the annular rotating plate 418 through a rotating connecting groove opened inside it. Several rolling balls 45 are provided at the connection between the annular rotating plate 418 and the rotating connecting ring 419. Two push-pull rods 43 are fixedly connected to the lower end of the annular rotating plate 418. The lower ends of the two push-pull rods 43 pass through two sliding through holes 11 opened inside the circular rotating disk 6 and are connected to the connecting assembly 8. The left and right ends of the rotating connecting ring 419 are fixedly connected to the connecting components 8. The two limiting slide plates 44 are slidably connected to the two limiting rods 42 respectively. The upper ends of the two limiting rods 42 are fixedly connected to the concave frame 41, and the lower ends of the two limiting rods 42 are fixedly connected to the support cross plate 7. The cooperation of the limiting slide plates 44 and the limiting rods 42 can increase the stability of the rotating connecting ring 419 during its up and down movement. The rotating connecting ring 419 is driven to move downward by the synchronous electric push rod body 46. Then, with the cooperation of the annular rotating plate 418, the push-pull rod 43 and the connecting component 8, the four burr brush rollers 9 can be driven to move away from the center synchronously, thereby adapting to nuts with different inner holes.

[0035] The connecting assembly 8 includes a second circular plate 87. The upper end of the second circular plate 87 is fixedly connected to the lower ends of two push-pull rods 43. The second circular plate 87 is slidably connected to four fixed rods 88 through four evenly spaced through holes inside it. The upper ends of the four fixed rods 88 are all fixedly connected to the circular rotating disk 6, and the lower ends of the four fixed rods 88 are all fixedly connected to the upper end of a first circular plate 81. The first circular plate 81 is slidably connected to four connecting blocks 84 through four evenly spaced sliding through slots 83 inside it. The lower ends of the four connecting blocks 84 are all fixedly mounted with burr brush rollers 9. The four connecting blocks 84 are movably connected to one end of four hinge plates 85 through hinge shafts set at their upper ends. The other ends of the four hinge plates 85 are all connected to the second circular plate 87, which has four hinge seats 86 at its lower end. The four connecting blocks 84 are slidably connected to one end of four hinge plates 85 through four evenly spaced through holes inside them. The limiting hole group is slidably connected to four limiting rod groups 82, which are fixedly connected to the inside of four sliding through grooves 83. The rotation of the circular rotating disk 6, in cooperation with the four fixed columns, can drive the circular plate 1 81 to rotate. Then, with the cooperation of the limiting rod groups 82 and the connecting blocks 84, the four burr brush rollers 9 can be driven to rotate, thereby achieving the effect of cleaning burrs in the inner hole of the nut. The push-pull rod 43 drives the circular plate 2 87 to move downward relative to the circular plate 1 81. Then, with the cooperation of the hinge plate 85 and the limiting rod groups 82, the four connecting blocks 84 can be driven to move synchronously away from the center of the circular plate 2 87, thereby realizing the adjustment of the position between the four burr brush rollers 9, which is convenient for adapting nuts with different inner holes.

[0036] The working principle of this invention is as follows:

[0037] a1. First, fix the nut to be processed on the worktable. Start the two synchronous electric hydraulic cylinders 3. The electric hydraulic cylinders push the support plate 7 and move it smoothly downward along the T-shaped guide rod 2 through the L-shaped guide slide plate 5. This drives the circular rotating disk 6, the connecting assembly 8 and the four burr brush rollers 9 to descend as a whole until the lower end of the burr brush rollers 9 extends into the inner hole of the nut to be processed. Adjust the processing depth according to the axial thickness of the nut. Then, according to the inner hole diameter of the nut to be processed, start the two synchronous electric push rods 46. The electric push rods push the rotating connecting ring 419 and the annular rotating plate 418 downward, so that the two push-pull rods 43 pass through the sliding through hole 11 and press down the second circular plate 87. The second circular plate 87 is close to the first circular plate 81. Through the hinge plate 85, push the four connecting blocks 84 to slide synchronously along the sliding through groove 83 of the first circular plate 81 under the guidance of the limiting rod group 82. This drives the four burr brush rollers 9 to move synchronously until the outer wall of the four burr brush rollers 9 is tightly attached to the processing surface of the inner hole of the nut.

[0038] a2. After the above adjustments are completed, start the motor 416 in the adjustment assembly 4. The output shaft of the motor 416 drives the disc 410 to rotate. The push rod 417 on the disc 410 slides in the push groove, driving the T-shaped push-pull block 415 and the meshing tooth plate 48 to perform reciprocating linear motion. The meshing tooth plate 48 drives the meshing gear 412 to rotate alternately in the forward and reverse directions. The reciprocating torque is transmitted to the circular rotating disk 6 through the rotating shaft 413. The circular rotating disk 6 rotates with low friction with the assistance of the rolling ball 10. The fixed rod 88 drives the circular plate 81 and the four burr brush rollers 9 to perform high-frequency reciprocating rotation grinding on the inner wall of the nut until the burrs are completely removed.

[0039] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A flexible brush adjustment device for deburring the inner hole of a nut, comprising a mounting bracket (1), characterized in that: The lower end of the mounting bracket (1) is provided with two synchronous electric hydraulic cylinder bodies (3). The lower ends of the two synchronous electric hydraulic cylinder bodies (3) are fixedly connected to the upper end of the support plate (7). The support plate (7) is movably connected to a circular rotating disk (6) through a connecting hole opened inside it. The lower end of the circular rotating disk (6) is provided with a connecting component (8). The lower end of the connecting component (8) is provided with four evenly distributed burr brush rollers (9). The upper end of the support plate (7) is provided with an adjusting component (4). The lower end of the adjusting component (4) passes through two sliding through holes (11) opened inside the circular rotating disk (6) and is connected to the connecting component (8). The lower side of the adjusting component (4) is connected to the circular rotating disk (6).

2. The elastic brush adjustment device for deburring the inner hole of a nut according to claim 1, characterized in that: Several rolling balls (10) are provided at the connection between the support plate (7) and the circular rotating disk (6). Two L-shaped guide slides (5) are fixedly connected to the upper left and right sides of the support plate (7). The four L-shaped guide slides (5) are slidably connected to the four T-shaped guide rods (2) respectively through the guide holes opened inside their upper ends. The upper ends of the four T-shaped guide rods (2) are fixedly connected to the lower end of the mounting frame (1).

3. The elastic brush adjustment device for deburring the inner hole of a nut according to claim 1, characterized in that: The adjustment component (4) includes a concave frame (41), the lower end of which is fixedly connected to the upper end of the support plate (7). A motor (416) is fixedly installed on the upper end of the concave frame (41). The output shaft of the motor (416) is fixedly connected to a disc (410). A push rod (417) is fixedly connected to the front end of the disc (410) away from the axis. The push rod (417) is movably connected to a T-shaped push-pull block (415) with a push groove inside the rear end. A meshing toothed plate (48) is fixedly connected to the front end of the T-shaped push-pull block (415). The meshing toothed plate (48) meshes with a meshing gear (412). The meshing gear (412) is fixedly connected to the upper end of the rotating shaft (413).

4. The elastic brush adjustment device for deburring the inner hole of a nut according to claim 3, characterized in that: The upper side of the rotating shaft (413) is movably connected to the upper end of the concave frame (41), and the lower side of the rotating shaft (413) is movably connected to the concave plate (414). The lower end of the concave plate (414) is fixedly connected to the upper end of the support plate (7). The lower end of the rotating shaft (413) is fixedly connected to the circular rotating disk (6). The upper and lower ends of the T-shaped push-pull block (415) are both fixedly connected to the support slider (411). The two support sliders (411) are slidably connected to the two limiting rods (49) respectively. The left and right ends of the two limiting rods (49) are fixedly connected to the relatively close ends of the two fixed plates (47) respectively. The lower ends of the two fixed plates (47) are both fixedly connected to the upper end of the concave frame (41).

5. The elastic brush adjustment device for deburring the inner hole of a nut according to claim 3, characterized in that: Two synchronous electric push rod bodies (46) are fixedly installed at the upper end of the concave frame (41). The lower ends of the two synchronous electric push rod bodies (46) are fixedly connected to the rotating connecting ring (419). The rotating connecting ring (419) is movably connected to the annular rotating plate (418) through a rotating connecting groove opened inside it. Several rolling balls (45) are provided at the connection between the annular rotating plate (418) and the rotating connecting ring (419). Two push-pull rods (43) are fixedly connected to the lower end of the annular rotating plate (418). The lower ends of the two push-pull rods (43) pass through the two sliding through holes (11) opened inside the circular rotating disk (6) and are connected to the connecting assembly (8). The left and right ends of the rotating connecting ring (419) are fixedly connected to the limiting slide plate (44). The two limiting slide plates (44) are slidably connected to the two limiting rods (42). The upper ends of the two limiting rods (42) are fixedly connected to the concave frame (41), and the lower ends of the two limiting rods (42) are fixedly connected to the supporting horizontal plate (7).

6. The elastic brush adjustment device for deburring the inner hole of a nut according to claim 5, characterized in that: The connecting assembly (8) includes a second circular plate (87), the upper end of which is fixedly connected to the lower ends of two push-pull rods (43). The second circular plate (87) is slidably connected to four fixed rods (88) through four through holes evenly opened inside it. The upper ends of the four fixed rods (88) are all fixedly connected to a circular rotating disk (6). The lower ends of the four fixed rods (88) are all fixedly connected to the upper end of a first circular plate (81). The first circular plate (81) is slidably connected to four connecting blocks (84) through four sliding through grooves (83) evenly opened inside it. The lower ends of the four connecting blocks (84) are all fixedly installed with burr brush rollers (9).

7. The elastic brush adjustment device for deburring the inner hole of a nut according to claim 1, characterized in that: The four connecting blocks (84) are movably connected to one end of the four hinge plates (85) through the hinge shafts provided at their upper ends. The other end of the four hinge plates (85) is connected to the circular plate (87) with four hinge seats (86) at its lower end. The four connecting blocks (84) are slidably connected to the four limiting rod groups (82) through the limiting hole group opened inside them. The four limiting rod groups (82) are fixedly connected inside the four sliding through slots (83).

8. A method of using the elastic brush adjustment device for deburring the inner hole of a nut according to any one of claims 1-7, comprising the following steps: a1. First, fix the nut to be processed on the worktable, start the two synchronous electric hydraulic cylinder bodies (3), the electric hydraulic cylinder pushes the support plate (7), and moves smoothly downward along the T-shaped guide rod (2) through the L-shaped guide slide (5), thereby driving the circular rotating disk (6), connecting assembly (8) and four burr brush rollers (9) to descend as a whole until the lower end of the burr brush roller (9) extends into the inner hole of the nut to be processed, and adjusts it to a suitable processing depth according to the axial thickness of the nut. Then, according to the inner hole diameter of the nut to be processed, start the two synchronous electric push rod bodies (4) 6) The electric push rod pushes the rotating connecting ring (419) and the annular rotating plate (418) downward, so that the two push-pull rods (43) pass through the sliding through hole (11) and press down the circular plate two (87). The circular plate two (87) is close to the circular plate one (81). Through the hinge plate (85), the four connecting blocks (84) are pushed to slide synchronously along the sliding through groove (83) of the circular plate one (81) under the guidance of the limiting rod group (82), thereby driving the four burr brush rollers (9) to move synchronously until the outer wall of the four burr brush rollers (9) is tightly attached to the machined surface of the nut inner hole. a2. After the above adjustment is completed, start the motor (416) in the adjustment component (4). The output shaft of the motor (416) drives the disc (410) to rotate. The push rod (417) on the disc (410) slides in the push groove, driving the T-shaped push-pull block (415) and the meshing tooth plate (48) to perform left and right reciprocating linear motion. The meshing tooth plate (48) drives the meshing gear (412) to rotate alternately in the forward and reverse directions. The reciprocating torque is transmitted to the circular rotating disk (6) through the rotating shaft (413). The circular rotating disk (6) rotates with low friction with the assistance of the rolling ball (10). The fixed rod (88) drives the circular plate (81) and four burr brush rollers (9) to perform high-frequency reciprocating rotation grinding on the inner wall of the nut until the burrs are completely removed.

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