A fine grinding tool for the interior of a breaker cylinder

Abstract

The present application relates to the technical field of honing, and discloses a fine honing tool for the interior of a breaker cylinder block, including a hydraulic rod and a main spindle box. The main spindle box includes a second motor, and a rotary tooling is installed on the output shaft of the second motor; three grinding mechanisms are slidably installed inside the rotary tooling. A plurality of equally-angled distributed clamping grooves are formed on the outer surface of the rotary tooling and a synchronization mechanism is installed. A limiting mechanism is hinged inside the clamping grooves. After being redesigned, this device realizes the functions of synchronous centering and positioning of the rotary tooling and the grinding mechanisms, thereby improving the fine honing precision of the device for the inner wall of the cylinder block. This device is provided with three sliding grooves and a central mounting groove on the outer surface of the rotary tooling, and the three equally-angled distributed grinding mechanisms are sequentially arranged therein. The oilstone is controlled by a fourth spring to be at a position with a gap from the inner wall of the cylinder block, and the central positioning function of the device is given to the limiting mechanism and the synchronization mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of honing, and particularly relates to a fine honing tool for the interior of a breaker cylinder block. Background Art

[0002] A breaker is a device used for building demolition. It uses hydraulic power and drives a piston to reciprocate inside a cylinder block, driving the breaker to perform wall demolition operations. It has the advantages of convenient operation and high work efficiency. Generally, the interior of the breaker cylinder block needs to be finely honed to remove the surplus and impurities on the inner wall of the cylinder. In the prior art, the fine honing tool for the interior of the breaker cylinder block works in a honing manner, that is, multiple groups of oilstones that can rotate are driven by a rotating tool to rotate and rub against the interior of the breaker cylinder block to remove impurities and the surplus on the inner wall of the cylinder. At the same time, the entire rotating tool will also reciprocate along the axis of the inner wall of the cylinder to cover the inner wall of the cylinder comprehensively.

[0003] However, in the prior art, the fine honing tool for the interior of the breaker cylinder block does not strictly implement fine honing. When the rotating tool drives the oilstones to rotate inside the cylinder wall, there may be honing deviations. Since the inner wall of the cylinder is only positioned and centered once before processing (that is, to ensure that the rotating honing axis of the device coincides with the axis of the inner wall of the cylinder), and then, the high-speed rotating oilstones will polish the inner wall of the cylinder. However, the oilstones will continuously experience slight wear during operation, that is, the rotating honing radius of the oilstones will shrink. At this time, the rotating tool will drive the oilstones to move synchronously outward with the centrifugal force generated during rotation and make the oilstones closely adhere to the inside of the cylinder. Since the linear movement path of the rotating tool remains unchanged during operation, when the oilstones experience different degrees of wear (the oilstones are installed equidistantly on the outer side of the rotating tool in a circular pattern, and the outer side generally fits against the inner wall of the cylinder. Due to different positions during rotation, the forces received at the same position will inevitably be different during actual movement, resulting in inconsistent wear), their contact area and contact surface pressure with the inner wall of the cylinder are different, which leads to inconsistent rotating honing pressure on the inner wall of the cylinder and a decrease in the fine honing accuracy of the inner wall of the cylinder. Summary of the Invention

[0004] The present application provides a fine honing tool for the interior of a breaker cylinder block, which has the advantage of high fine honing accuracy and is used to solve the problem of low honing accuracy caused by uneven rotating honing pressure of the honing parts on the inner wall of the cylinder in the prior art.

[0005] To achieve the above object, the present application adopts the following technical solution: A fine honing tool for the interior of a breaker cylinder block, comprising:

[0006] A hydraulic rod and a main spindle box, the main spindle box includes a second motor, and the output shaft of the second motor is provided with a rotating tool;

[0007] Inside the rotating tooling, three grinding mechanisms are slidably installed. On the outer surface of the rotating tooling, multiple groups of equally angularly distributed clamping grooves are provided and a synchronization mechanism is installed. Inside the clamping grooves, a limiting mechanism is hinged.

[0008] The limiting mechanism includes a fixed column. An outer surface of the fixed column is movably sleeved with a limiting column. A top end of the limiting column is hermetically sleeved with a rotating cylinder. A roller is fixedly installed at a top end of the rotating cylinder. A buffer pad is fixedly sleeved on an outer surface of the roller.

[0009] The synchronization mechanism includes a fixed ring fixedly installed at a top of the outer surface of the rotating tooling and a connecting rod hinged to an outer surface of the fixed column. An outer surface of the rotating tooling is movably sleeved with a third spring and a moving ring. A connecting block is fixedly installed at a bottom of the moving ring. A top of the connecting rod is hinged to the connecting block.

[0010] Preferably, the fixed column is fixedly installed on an inner wall of the clamping groove. A placement cavity is provided inside the limiting column. A flexible hose is connected between an outer surface of the limiting column and the clamping groove. A valve plate is fixedly installed inside the rotating cylinder. A communicating cylinder and a second spring are hermetically sleeved inside the rotating cylinder. Two ends of the second spring are elastically connected to the rotating cylinder and the communicating cylinder respectively. A bottom end of the communicating cylinder abuts against the valve plate. Two ends of the third spring are elastically connected to the fixed ring and the moving ring respectively.

[0011] Preferably, the valve plate is located at a bottom of an inner cavity of the rotating cylinder. A diameter value of the valve plate is smaller than an inner diameter value of the inner cavity of the rotating cylinder.

[0012] Preferably, an installation groove and a liquid storage tank are respectively provided in a middle part and an upper part inside the rotating tooling. The liquid storage tank is provided with an opening at a top and a plug is installed. The inner cavity of the liquid storage tank is filled with a coolant. The placement cavity and the liquid storage tank are communicated through a flexible hose.

[0013] Preferably, three sliding grooves are provided on an inner wall of the installation groove. The grinding mechanism includes a slider movably clamped inside the sliding grooves. A fourth spring is elastically connected between an inner side of the slider and an inner wall of the installation groove. An oilstone is fixedly installed on an outer side of the slider through a fixing plate and bolts. The fixing plate is fixedly connected to the oilstone. The fixing plate is threadedly installed on the slider through bolts.

[0014] Preferably, a telescopic end of the hydraulic rod is fixedly connected to the main spindle box. Inside the main spindle box, a moving box and a first spring are movably sleeved. A first motor is fixedly installed on an inner wall of the main spindle box above the moving box. An output shaft of the first motor is installed with a cam. An outer surface of the cam abuts against a top of the moving box. The first spring is movably sleeved on an outer surface of the moving box. Two ends of the first spring are elastically connected to the moving box and a bottom of the inner wall of the main spindle box respectively. A second motor is fixedly installed inside the moving box.

[0015] Preferably, the three groups of the sliding grooves are circumferentially and equally angularly distributed on the outer surface of the rotary tooling, and the three groups of the rotary tooling and the clamping grooves are staggered with an included angle of 60° with each other.

[0016] Preferably, two groups of the fixing plates are provided and symmetrically distributed on the upper and lower sides of the slider, and the outer side surface of the oilstone is designed with an arc transition.

[0017] Preferably, the buffer pad is made of hard rubber, and the top opening of the communication cylinder faces the outer surface of the buffer pad.

[0018] Preferably, the rotating cylinder can drive the roller to freely rotate around the axis of the limit post. When the whole rotary tooling rotates around its own axis, the rotating cylinder and the roller will rotate 90° around the axis of the limit post.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The device is redesigned to realize the functions of synchronous centering and positioning of the rotary tooling and the grinding mechanism, thereby improving the fine grinding precision of the device for the inner wall of the cylinder. The device is provided with three groups of sliding grooves and an installation groove in the middle on the outer surface of the rotary tooling, and the three groups of equally angularly distributed grinding mechanisms are sequentially arranged therein. The oilstone is controlled by the spring four to be in a position with a gap between the inner wall of the cylinder. The centering function of the device is handed over to the limit mechanism and the synchronous mechanism; after the device enters the inner wall of the cylinder, due to the overall inclined design of the limit post and the rotating cylinder, the buffer pad and the roller first rotate and abut against the top of the inner wall of the cylinder. The connecting block and the connecting rod at the bottom of the moving ring are hinged to the outer surface of the limit post. When the roller is limited by the inner wall of the cylinder and rotates upward and contracts, the equally long connecting rod makes the rotation angles of the three groups of limit posts equal synchronously by rotational adaptation. At the same time, when the connecting rod moves upward through the hinged connection with the connecting block, it drives the moving ring to compress the spring three. Multiple groups make the roller and the buffer pad generate the same pressure when abutting against the inner wall of the cylinder. At this time, the rotary tooling realizes the function of collinear axes with the inner wall of the cylinder through the cooperation of the three groups of limit mechanisms and the synchronous mechanism.

[0021] 2. Then, when the rotary tooling rotates, due to the design that the rotating cylinder is sleeved on the top of the limit post in a sealed manner, the roller and the buffer pad rotate about 90° by themselves under the friction force of the inner wall of the cylinder, and the rotational adaptation of the roller is completed. At the same time, the centrifugal force generated when the rotary tooling drives the limit mechanism and the synchronous mechanism to rotate is used to keep the roller pressing on the inner wall of the cylinder synchronously. In this way, the synchronous centering task during the grinding process of the inner wall of the cylinder by the device is completely handed over to the limit mechanism and the synchronous mechanism to solve. Even if the oilstone is worn and consumed during work, the degree of consumption is highly synchronous, thus maintaining the precision of fine grinding of the inner wall of the cylinder.

[0022] 3. The device also integrates the cooling system inside the rotating tooling and the limiting mechanism. By opening a liquid storage tank inside the rotating tooling and filling it with coolant, and connecting it with a hose, the coolant can automatically fill the placement cavity and the inner cavity of the rotating cylinder under the action of gravity. When the device stops working, the second spring can exert pressure on the connecting cylinder, making it abut against the valve plate to form a seal. When the device is running and rotating, a centrifugal force will be generated in the inner cavity of the rotating cylinder, thus offsetting the elastic force of the second spring, creating a gap between the bottom opening of the connecting cylinder and the valve plate. With this design, the coolant can automatically drain along the rollers, thereby achieving synchronous lubrication and cooling between the device and the inner wall of the cylinder, greatly reducing the manufacturing cost of the device, and the provision of coolant does not require additional structures and energy, greatly improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings forming a part of the specification depict the embodiments disclosed in the present application and, together with the specification, are used to explain the principles disclosed in the present application in a clear and understandable manner.

[0024] Referring to the drawings, the present disclosure can be more clearly understood from the following detailed description, wherein:

[0025] Figure 1 is an internal display view of the overall structure of the present invention;

[0026] Figure 2 is a front sectional view of the overall structure of the present invention;

[0027] Figure 3 for the present invention Figure 2 is an enlarged view of the structure at A in the present invention;

[0028] Figure 4 is a side sectional view of the rotating tooling, limiting mechanism, synchronization mechanism and grinding mechanism of the present invention;

[0029] Figure 5 for the present invention Figure 4 is an enlarged view of the structure at B in the present invention;

[0030] Figure 6 is a top sectional view of the rotating tooling of the present invention;

[0031] Figure 7 is a separated view of the grinding mechanism of the present invention;

[0032] Figure 8 is a mating view of the limiting mechanism and the synchronization mechanism of the present invention;

[0033] Figure 9 is a separated view of the limiting mechanism of the present invention.

[0034] Wherein: 1. Hydraulic rod; 2. Main spindle box; 21. Motor 1; 22. Cam; 23. Movement box; 24. Spring 1; 25. Motor 2; 3. Rotating tooling; 31. Installation groove; 32. Sliding groove; 33. Liquid storage tank; 34. Plug; 4. Card slot; 5. Limiting mechanism; 51. Fixed column; 52. Limiting column; 53. Placing cavity; 54. Hose; 55. Rotating cylinder; 56. Valve plate; 57. Connecting cylinder; 58. Spring 2; 59. Roller; 510. Buffer pad; 6. Synchronization mechanism; 61. Fixed ring; 62. Spring 3; 63. Moving ring; 64. Connecting block; 65. Connecting rod; 7. Grinding mechanism; 71. Spring 4; 72. Slide block; 73. Fixed plate; 74. Bolt; 75. Oilstone. Detailed implementation manner

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] Please refer to Figures 1-9 , this embodiment discloses a fine grinding tool for the inside of a breaker cylinder body, including:

[0037] A hydraulic rod 1 and a main spindle box 2, the main spindle box 2 includes a motor 25, and a rotating tooling 3 is installed on the output shaft of the motor 25;

[0038] Three grinding mechanisms 7 are slidably installed inside the rotating tooling 3, a plurality of groups of card slots 4 are arranged on the outer surface of the rotating tooling 3 at equal angles and a synchronization mechanism 6 is installed, and a limiting mechanism 5 is hinged inside the card slot 4;

[0039] The limiting mechanism 5 includes a fixed column 51, a limiting column 52 is movably sleeved on the outer surface of the fixed column 51, a rotating cylinder 55 is hermetically sleeved at the top of the limiting column 52, a roller 59 is fixedly installed at the top of the rotating cylinder 55, and a buffer pad 510 is fixedly sleeved on the outer surface of the roller 59;

[0040] The synchronization mechanism 6 includes a fixed ring 61 fixedly installed on the top of the outer surface of the rotating tooling 3 and a connecting rod 65 hinged on the outer surface of the fixed column 51, a spring 3 62 and a moving ring 63 are movably sleeved on the outer surface of the rotating tooling 3, a connecting block 64 is fixedly installed at the bottom of the moving ring 63, and the top of the connecting rod 65 is hinged to the connecting block 64;

[0041] This device has been redesigned to achieve the functions of synchronous centering and positioning of the rotating tooling 3 and the grinding mechanism 7, thereby improving the fine grinding accuracy of the device for the inner wall of the cylinder. This device is provided with three groups of chutes 32 on the outer surface of the rotating tooling 3 and an installation groove 31 in the middle, and distributes the three groups of grinding mechanisms 7 evenly in angles in sequence. The oilstone 75 is controlled by the spring four 71 to be in a position with a gap from the inner wall of the cylinder, and the central positioning function of the device is handed over to the limiting mechanism 5 and the synchronous mechanism 6;

[0042] After the device enters the inner wall of the cylinder, by using the overall inclined design of the limiting column 52 and the rotating cylinder 55, the buffer pad 510 and the roller 59 are first rotationally abutted against the top of the inner wall of the cylinder. The connecting block 64 and the connecting rod 65 at the bottom of the moving ring 63 are hinged to the outer surface of the limiting column 52. When the roller 59 is limited by the inner wall of the cylinder and contracts and rotates upward, the equal-length connecting rod 65 makes the rotation angles of the three groups of limiting columns 52 equal synchronously through rotational adaptation. At the same time, when the connecting rod 65 moves upward through the hinged connection with the connecting block 64, it drives the moving ring 63 to compress the spring three 62, so that the roller 59 and the buffer pad 510 generate the same pressure when abutting against the inner wall of the cylinder. At this time, through the cooperation of the three groups of limiting mechanisms 5 and the synchronous mechanism 6, the rotating tooling 3 realizes the function that its axis is collinear with the axis of the inner wall of the cylinder.

[0043] Then, when the rotating tooling 3 rotates, due to the design that the rotating cylinder 55 is hermetically sleeved on the top of the limiting column 52, the roller 59 and the buffer pad 510 rotate about 90° by themselves under the friction force of the inner wall of the cylinder and complete the rotational adaptation of the roller 59. At the same time, when the rotating tooling 3 drives the limiting mechanism 5 and the synchronous mechanism 6 to rotate, the centrifugal force generated is used to keep the roller 59 pressing on the inner wall of the cylinder synchronously. In this way, the synchronous centering task during the grinding process of the inner wall of the cylinder by the device is completely solved by the limiting mechanism 5 and the synchronous mechanism 6. Even if the oilstone 75 is worn during operation, the degree of wear is highly synchronous, thus maintaining the accuracy of fine grinding of the inner wall of the cylinder.

[0044] Among them, the fixed column 51 is fixedly installed on the inner wall of the card slot 4. A placement cavity 53 is opened inside the limiting column 52. A hose 54 is connected between the outer surface of the limiting column 52 and the card slot 4. A valve plate 56 is fixedly installed inside the rotating cylinder 55. A communicating cylinder 57 and a spring two 58 are hermetically sleeved inside the rotating cylinder 55. The two ends of the spring two 58 are elastically connected to the rotating cylinder 55 and the communicating cylinder 57 respectively. The bottom end of the communicating cylinder 57 abuts against the valve plate 56. The two ends of the spring three 62 are elastically connected to the fixed ring 61 and the moving ring 63 respectively;

[0045] The device also integrates the cooling system inside the rotating tooling 3 and the limiting mechanism 5. By arranging a liquid storage tank 33 inside the rotating tooling 3 and filling it with coolant, and connecting it through a hose 54, the coolant can automatically fill the placement cavity 53 and the inner cavity of the rotating cylinder 55 under the action of gravity. When the device stops working, the second spring 58 can exert pressure on the connecting cylinder 57 to make it abut against the valve plate 56 to form a seal. When the device operates and rotates, a centrifugal force will be generated in the inner cavity of the rotating cylinder 55, thus offsetting the elastic force of the second spring 58 and creating a gap between the bottom opening of the connecting cylinder 57 and the valve plate 56. With such a design, the coolant can automatically drain along the roller 59, thereby achieving synchronous lubrication and cooling between the device and the inner wall of the cylinder, greatly reducing the manufacturing cost of the device, and the provision of coolant does not require additional structures and energy, greatly improving the practicality of the device.

[0046] Among them, the valve plate 56 is located at the bottom of the inner cavity of the rotating cylinder 55, and the diameter value of the valve plate 56 is smaller than the inner diameter value of the inner cavity of the rotating cylinder 55;

[0047] The diameter value of the valve plate 56 is smaller than the inner diameter value of the upper part of the inner cavity of the rotating cylinder 55. As Figure 5 shown, when the connecting cylinder 57 disengages from abutting against the valve plate 56, the coolant can enter the connecting cylinder 57 along the gap generated between the two and drain out, while abutting will automatically seal the connecting cylinder 57 to prevent the coolant from draining out randomly.

[0048] Among them, an installation groove 31 and a liquid storage tank 33 are respectively arranged in the middle and upper part inside the rotating tooling 3. The top of the liquid storage tank 33 is provided with an opening and a plug 34 is installed. The inner cavity of the liquid storage tank 33 is filled with coolant, and the placement cavity 53 and the liquid storage tank 33 are connected through a hose 54;

[0049] Three groups of fourth springs 71 are placed inside the installation groove 31 and are elastically connected to three groups of sliders 72 and oilstones 75 correspondingly. The coolant in the inner cavity of the liquid storage tank 33 can be connected to the hose 54 through a communication groove opened at its bottom and continuously supply coolant.

[0050] Among them, three groups of sliding grooves 32 are opened on the inner wall of the installation groove 31. The grinding mechanism 7 includes sliders 72 that are movably clamped inside the sliding grooves 32. A fourth spring 71 is elastically connected between the inner side of the slider 72 and the inner wall of the installation groove 31. The outer side of the slider 72 is fixedly installed with an oilstone 75 through a fixing plate 73 and a bolt 74. The fixing plate 73 is fixedly connected to the oilstone 75, and the fixing plate 73 is threadedly installed on the slider 72 through the bolt 74;

[0051] When the three groups of grinding mechanisms 7 are driven by the rotating tooling 3 to rotate at a high speed, they will move synchronously outward under the action of centrifugal force and generate a force on the inner wall of the cylinder, and cooperate with the high-speed rotation to achieve fine grinding of the inner wall of the cylinder.

[0052] Among them, the telescopic end of the hydraulic rod 1 is fixedly connected to the spindle box 2. Inside the spindle box 2, a moving box 23 and a first spring 24 are movably sleeved. A first motor 21 is fixedly installed on the inner wall of the spindle box 2 above the moving box 23. The output shaft of the first motor 21 is equipped with a cam 22. The outer surface of the cam 22 abuts against the top of the moving box 23. The first spring 24 is movably sleeved on the outer surface of the moving box 23. The two ends of the first spring 24 are elastically connected to the bottom of the moving box 23 and the inner wall of the spindle box 2 respectively. A second motor 25 is fixedly installed inside the moving box 23;

[0053] The hydraulic rod 1 is responsible for driving the entire rotating tooling 3 into the inner wall of the cylinder block. The first motor 21 drives the cam 22 to rotate, and every time it rotates one week, it pushes the moving box 23, the second motor 25 and the rotating tooling 3 downward. The first spring 24 just provides the power for upward reset, enabling the grinding mechanism 7 to fully grind the inner wall of the cylinder block during the up and down movement.

[0054] Among them, three groups of chutes 32 are circumferentially and equally angularly distributed on the outer surface of the rotating tooling 3. The three groups of rotating tooling 3 and the card slots 4 are staggered at an angle of 60° to each other;

[0055] The three groups of grinding mechanisms 7 and the three groups of limiting mechanisms 5 are staggered with each other and do not interfere with each other. The angle between adjacent ones is 60°. The angle between the three groups of limiting mechanisms 5 is 120° to each other.

[0056] Among them, two fixing plates 73 are provided and symmetrically distributed on the upper and lower sides of the slider 72. The outer side of the oilstone 75 is designed with an arc transition;

[0057] When the oilstone 75 is consumed, the connection between the oilstone 75 and the slider 72 can be disconnected by removing the bolt 74, which is convenient for replacement. The outer side of the oilstone 75 can perfectly fit the inner wall of the cylinder block, thereby improving the grinding efficiency.

[0058] Among them, the buffer pad 510 is made of hard rubber. The top opening of the communicating cylinder 57 faces the outer surface of the buffer pad 510;

[0059] The buffer pad 510 abuts against the inner wall of the cylinder block and generates frictional force, enabling the roller 59 to rotate synchronously for adaptation. The design of its flexible material can avoid rigid pressure damage to the inner wall of the cylinder block.

[0060] Among them, the rotating cylinder 55 can drive the roller 59 to freely rotate around the axis of the limiting column 52. When the entire rotating tooling 3 rotates around its own axis, the rotating cylinder 55 and the roller 59 will rotate 90° around the axis of the limiting column 52;

[0061] When the roller 59 abuts against the inner wall of the cylinder block and moves, it can freely rotate according to the movement of the device to complete the rotational adaptation.

[0062] Working principle:

[0063] When the device is working, first, start the hydraulic rod 1, and drive the spindle box 2, the rotary tooling 3, the synchronization mechanism 6 and the grinding mechanism 7 to move downward to the inner wall of the workpiece cylinder. The buffer pad 510 and the roller 59 first contact the top of the inner wall of the cylinder, and under the condition of being limited by the inner wall of the cylinder, the whole drives the limit column 52 to rotate counterclockwise synchronously around the axis of the fixed column 51, as Figure 4 , Figure 5 shown. When the limit column 52 drives the connecting rod 65 to rotate upward, the connecting rod 65 pushes the connecting block 64 and the moving ring 63 upward and compresses the third spring 62. Since the connecting rod 65 has a fixed length and the rotation angles of multiple groups of hoses 54 are the same, at this time, the rotation axes of the rotary tooling 3 and the grinding mechanism 7 are collinear with the axis of the inner wall of the cylinder;

[0064] Then, start the second motor 25, and drive the limit mechanism 5, the synchronization mechanism 6 and the grinding mechanism 7 to rotate inside the cylinder. At this time, the slider 72 and the oilstone 75 move outward toward the outside of the chute 32 under the action of centrifugal force, and contact, rotate and rub against the inner wall of the cylinder to perform fine grinding operation on the inner wall of the cylinder. At the same time, since the buffer pad 510 and the roller 59 contact the inner wall of the cylinder, the rotating cylinder 55 is driven to rotate 90° around the axis of the limit column 52 during self-rotation, so that the roller 59 and the buffer pad 510 continue to rotate. At the same time, the communicating cylinder 57 in the inner cavity of the rotating cylinder 55 moves toward the center of the roller 59 under the action of centrifugal force and compresses the second spring 58, so that the valve plate 56 is separated from the bottom end of the communicating cylinder 57. The coolant from the plug 34 is discharged to the top opening of the communicating cylinder 57 along the gaps between the valve plate 56 and the communicating cylinder 57 in the hoses 54, the placement cavity 53 and the inner cavity of the rotating cylinder 55 under the action of centrifugal force. The coolant directly sprays on the outer surface of the buffer pad 510 to lubricate the buffer pad 510 and the inner wall of the cylinder, and at the same time, provides lubrication and cooling between the oilstone 75 and the inner wall of the cylinder;

[0065] Finally, start the first motor 21, and drive the cam 22 to rotate, so that the moving box 23 and the second motor 25 make up-and-down reciprocating motions under the action of the cam 22 and the first spring 24. At this time, the rotary tooling 3 as a whole will drive the grinding mechanism 7 and the limit mechanism 5 to make up-and-down reciprocating motions, and the roller 59 and the buffer pad 510 in the up-and-down reciprocating motions continue to rotate 90° under the action of the inner wall of the cylinder to adapt to their up-and-down motions on the inner wall of the cylinder.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A fine grinding tool for the interior of a breaker cylinder body, comprising: A hydraulic rod (1) and a main spindle box (2), the main spindle box (2) includes a second motor (25), and a rotary tooling (3) is installed on the output shaft of the second motor (25); It is characterized in that three grinding mechanisms (7) are slidably installed inside the rotary tooling (3), a plurality of groups of equally angularly distributed card slots (4) are formed on the outer surface of the rotary tooling (3), and a synchronization mechanism (6) is installed, and a limiting mechanism (5) is hinged inside the card slot (4); The limiting mechanism (5) includes a fixed column (51), a limiting column (52) is movably sleeved on the outer surface of the fixed column (51), a rotary cylinder (55) is hermetically sleeved at the top of the limiting column (52), a roller (59) is fixedly installed at the top of the rotary cylinder (55), and a buffer pad (510) is fixedly sleeved on the outer surface of the roller (59); The synchronization mechanism (6) includes a fixed ring (61) fixedly installed on the top of the outer surface of the rotary tooling (3) and a connecting rod (65) hinged on the outer surface of the fixed column (51), a third spring (62) and a moving ring (63) are movably sleeved on the outer surface of the rotary tooling (3), a connecting block (64) is fixedly installed at the bottom of the moving ring (63), and the top of the connecting rod (65) is hinged to the connecting block (64); The fixed column (51) is fixedly installed on the inner wall of the card slot (4), a placement cavity (53) is formed inside the limiting column (52), a hose (54) is connected between the outer surface of the limiting column (52) and the card slot (4), a valve plate (56) is fixedly installed inside the rotary cylinder (55), a communicating cylinder (57) and a second spring (58) are hermetically sleeved inside the rotary cylinder (55), two ends of the second spring (58) are elastically connected to the rotary cylinder (55) and the communicating cylinder (57) respectively, the bottom end of the communicating cylinder (57) abuts against the valve plate (56), two ends of the third spring (62) are elastically connected to the fixed ring (61) and the moving ring (63) respectively, the valve plate (56) is located at the bottom of the inner cavity of the rotary cylinder (55), and the diameter value of the valve plate (56) is smaller than the inner diameter value of the inner cavity of the rotary cylinder (55).

2. The refined grinding tool for the interior of a breaker cylinder according to claim 1, characterized in that An installation groove (31) and a liquid storage tank (33) are respectively formed in the middle and upper part inside the rotary tooling (3), the top of the liquid storage tank (33) is provided with an opening and a plug (34) is installed, the inner cavity of the liquid storage tank (33) is filled with coolant, and the placement cavity (53) and the liquid storage tank (33) are communicated through a hose (54).

3. The refined grinding tool for the interior of a breaker cylinder according to claim 2, wherein, Three groups of sliding grooves (32) are formed on the inner wall of the installation groove (31), the grinding mechanism (7) includes a slider (72) movably clamped inside the sliding groove (32), a fourth spring (71) is elastically connected between the inner side of the slider (72) and the inner wall of the installation groove (31), an oilstone (75) is fixedly installed on the outer side of the slider (72) through a fixing plate (73) and a bolt (74), the fixing plate (73) is fixedly connected with the oilstone (75), and the fixing plate (73) is threadedly installed on the slider (72) through the bolt (74).

4. The internal fine grinding tooling for a breaker cylinder according to claim 3, characterized in that The telescopic end of the hydraulic rod (1) is fixedly connected to the spindle box (2); a motion box (23) and a spring 1 (24) are movably sleeved inside the spindle box (2); a motor 1 (21) located above the motion box (23) is fixedly mounted on the inner wall of the spindle box (2); a cam (22) is mounted on the output shaft of the motor 1 (21); the outer surface of the cam (22) abuts against the top of the motion box (23); the spring 1 (24) is movably sleeved on the outer surface of the motion box (23); the two ends of the spring 1 (24) are elastically connected to the motion box (23) and the bottom of the inner wall of the spindle box (2) respectively; and the motor 2 (25) is fixedly mounted inside the motion box (23).

5. A fine grinding tool for the interior of a breaker cylinder according to claim 4, characterized in that, The three groups of slide grooves (32) are distributed at equal angles on the outer surface of the rotating tooling (3) in a circular manner, and the three groups of rotating tooling (3) and the clamping grooves (4) are staggered and distributed at an angle of 60° to each other.

6. A fine grinding tool for the interior of a breaker cylinder according to claim 5, characterized in that, The fixing plates (73) are arranged in two groups and are symmetrically distributed on the upper and lower sides of the sliding block (72); the outer side surface of the oilstone (75) is designed to be an arc transition.

7. A fine grinding tool for the interior of a breaker cylinder according to claim 6, characterized in that, The buffer pad (510) is made of hard rubber, and the top opening of the connecting tube (57) faces the outer surface of the buffer pad (510).

8. A fine grinding tool for the interior of a breaker cylinder according to claim 7, characterized in that, The rotating drum (55) can drive the roller (59) to rotate freely around the axis of the limiting column (52); when the rotating tool (3) rotates around its own axis as a whole, the rotating drum (55) and the roller (59) rotate 90 degrees around the axis of the limiting column (52).

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