An internal cutting power head with a hydraulic adjustment device

Abstract

An internal circular cutting power head with a hydraulic adjustment device belongs to the technical field of cutting power heads and solves technical problems such as deformation of the blade due to friction, vibration and other factors affecting the cutting effect and the large number of pulley transmission structures during cutting processing. The solution is: an internal circular cutting power head with a hydraulic adjustment device, including a first hydraulic adjustment device, a drive motor, a second hydraulic adjustment device and a cutter disc device arranged from left to right in sequence, the first hydraulic adjustment device includes a first cylinder, a first piston, an adjustment sleeve and a pressure gauge, the second hydraulic adjustment device includes a motor connecting flange, a bearing sleeve, a bearing retaining ring, a number of bearings, a second cylinder and a second piston, and the cutter disc device includes a cutter disc flange, a fixed cutter disc, a movable cutter disc, an internal circular cutting blade and an annular pressure plate. The present invention is easy to observe and can quickly adjust the working state of the internal circular cutting blade without affecting the efficiency and quality of cutting, and the setting of the drive motor saves structure.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting power heads, and particularly relates to an internal circle cutting power head with a hydraulic adjustment device. Background Art

[0002] The inner circle cutting blade is a kind of cutting tool with ultra-thin thickness. It can quickly cut the inner circle of the workpiece through rapid rotation. It has the advantages of small cutting gap, small cutting flatness, high grinding efficiency, etc. The inner circle cutting blade is bolted to the fixing device through a circle of connecting bolt holes around it. Since the inner circle cutting blade is very thin, it can only achieve better cutting effect by stretching it straight.

[0003] In the actual work process, there are two aspects of the problem:

[0004] 1. The blade needs to be pre-tightened after installation and before cutting. During the cutting process, the blade will be deformed due to factors such as friction, vibration, force, and heat, which greatly affects the cutting effect and needs to be tightened again. At this time, the connecting bolts are generally tightened manually, which is not only time-consuming, but also easy to cause uneven tightening of a circle of bolts, resulting in slight tilt of the inner circle cutting blade, etc., which will affect the cutting efficiency and quality;

[0005] Second, most of the inner circle cutting blades work by driving the pulley structure through the motor. The pulley structure involves many parts and takes up more space. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an internal circular cutting power head with a hydraulic adjustment device, which solves the technical problems that the blade is deformed due to friction, vibration, force, heat and other factors during cutting, affecting the cutting effect, and there are many pulley transmission structures.

[0007] In order to solve the above problems, the technical solution of the present invention is: an internal cutting power head with a hydraulic adjustment device, wherein: it includes a first hydraulic adjustment device, a drive motor, a second hydraulic adjustment device and a cutter disc device arranged in sequence from left to right; the drive motor is a coaxial double-shaft motor, and a through hole is arranged in the middle of the rotating shaft of the drive motor along the axial direction;

[0008] The first hydraulic adjustment device comprises a first cylinder, a first piston, an adjustment sleeve and a pressure gauge, the left protruding end of the rotating shaft extends from the right side wall of the first cylinder into the inner cavity of the first cylinder, the left protruding end of the rotating shaft is fixedly connected to the first cylinder, and the inner cavity of the first cylinder is communicated with the through hole of the rotating shaft; the adjustment sleeve is arranged on the left side of the first cylinder, the inner wall of the right end of the adjustment sleeve is threadedly connected with the outer wall of the left end of the first cylinder, a first piston rod through hole is arranged in the middle of the left side wall of the adjustment sleeve, the first piston is arranged in the inner cavity of the first cylinder, and the piston rod of the left end of the first piston extends outward from the first piston rod through hole, a horizontal oil passage is arranged in the middle of the first piston, and the pressure gauge is arranged on the left side of the first piston and communicated with the oil passage;

[0009] The second hydraulic adjustment device comprises a motor connecting flange, a bearing sleeve, a bearing retaining ring, a plurality of bearings, a second cylinder and a second piston. The motor connecting flange is fixedly arranged on the right end face of the driving motor. A rotating shaft through hole is arranged in the middle of the motor connecting flange. The bearing sleeve is installed on the right side of the motor connecting flange. The second cylinder is arranged in the bearing sleeve. The second piston is arranged in the inner cavity of the second cylinder. The outer wall of the second cylinder is connected to the bearing sleeve through a plurality of bearings and the second cylinder rotates relative to the bearing sleeve. The bearing retaining ring is arranged on the right end face of the bearing sleeve and the inner diameter of the bearing retaining ring is smaller than the outer diameter of the bearing. The right protruding end of the rotating shaft passes through the rotating shaft through hole of the motor connecting flange and then extends into the inner cavity of the second cylinder from the left side wall of the second cylinder. The second cylinder is fixedly connected to the right protruding end of the rotating shaft, and the inner cavity of the second cylinder is communicated with the through hole.

[0010] The cutter disc device comprises a cutter disc flange, a fixed cutter disc, a movable cutter disc, an inner circle cutting blade and an annular pressure plate, wherein the fixed cutter disc is a horizontally arranged cylindrical guide sleeve, the cutter disc flange is connected to the left end face of the fixed cutter disc, the annular pressure plate is arranged on one side of the right end face of the fixed cutter disc and is connected to the fixed cutter disc through connecting bolts, the movable cutter disc is a cylindrical cylinder body with an opening at one end, the movable cutter disc is horizontally arranged in the inner cavity of the fixed cutter disc, the open end of the movable cutter disc is close to one side of the annular pressure plate, the horizontal width of the movable cutter disc is a matching size with the horizontal width of the fixed cutter disc, the outer diameter of the movable cutter disc is consistent with the inner diameter of the fixed cutter disc, and the mounting edge of the inner circle cutting blade is arranged between the annular pressure plate and the fixed cutter disc;

[0011] A second piston rod through hole is provided in the middle of the cutter disc flange, and an annular boss matching the second piston is provided on the left side wall of the cutter disc flange and the circumferential direction of the second piston rod through hole. The cutter disc flange is arranged on the right side of the second hydraulic adjustment device and is connected to the right end face of the second cylinder barrel through bolts, and the annular boss extends into the inner cavity of the second cylinder barrel, and the piston rod at the right end of the second piston passes through the second piston rod through hole and is connected to the movable cutter disc; a butterfly spring is installed at the contact between the end face of the cutter disc flange and the end face of the second piston;

[0012] Hydraulic oil is contained in the oil passage, the first cylinder barrel, the through hole and the cavity of the second cylinder barrel.

[0013] Furthermore, a first sealing ring is installed at the contact point between the inner wall of the first cylinder and the left extended end of the rotating shaft.

[0014] Furthermore, two sets of round nuts are installed on the left end outer wall of the left extended end of the rotating shaft to fix the first cylinder.

[0015] Furthermore, a first retaining ring is provided at the left end of the first cylinder.

[0016] Furthermore, a second sealing ring is installed at the contact point between the inner wall of the second cylinder and the right extended end of the rotating shaft.

[0017] Furthermore, a round nut is installed on the outer wall of the left end of the second cylinder to axially fix the bearing.

[0018] Furthermore, the bearings are provided in three groups, and bearing adjustment pads are provided between the bearings.

[0019] Furthermore, the second cylinder is fixedly mounted on the right protruding end of the rotating shaft through a tightening sleeve.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. After working for a period of time, the inner circle cutting blade becomes loose, and the pressure of the hydraulic oil will float on the pressure gauge. Observe the pressure gauge and manually twist the adjustment sleeve. The adjustment sleeve drives the first piston to move. The hydraulic oil pushes the second piston on the right side to move under the action of the first piston. At this time, the moving cutter disc will squeeze the inner circle cutting blade in a whole circle, and stretch the inner circle cutting blade evenly again;

[0022] 2. A coaxial double-shaft motor is used. A through hole is opened in the rotating shaft of the driving motor to connect the hydraulic oil on both sides. When the driving motor works, the rotating shaft rotates, driving the second cylinder on the right to rotate, and then driving the cutter disc device to rotate for cutting.

[0023] The present invention is convenient to observe and simple to operate, and the working state of the inner circle cutting blade can be quickly adjusted without affecting the cutting efficiency and quality. The arrangement of the driving motor saves structure and space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1 An internal cutting power head with a hydraulic adjustment device is shown, wherein: it comprises a first hydraulic adjustment device 1, a drive motor 2, a second hydraulic adjustment device 3 and a cutter head device 4 arranged in sequence from left to right; the drive motor 2 is a coaxial double-shaft motor, and a through hole 2-2 is arranged in the middle of the rotating shaft 2-1 of the drive motor 2 along the axial direction;

[0027] The first hydraulic adjustment device 1 comprises a first cylinder 1-1, a first piston 1-2, an adjustment sleeve 1-3 and a pressure gauge 1-4. The left protruding end of the rotating shaft 2-1 extends from the right side wall of the first cylinder 1-1 into the inner cavity of the first cylinder 1-1. The left protruding end of the rotating shaft 2-1 is fixedly connected to the first cylinder 1-1. The inner cavity of the first cylinder 1-1 is connected to the through hole 2-2 of the rotating shaft 2-1. The adjustment sleeve 1-3 is arranged on the left side of the first cylinder 1-1. The inner wall of the right end of the adjustment sleeve 1-3 is connected to the inner cavity of the first cylinder 1-1. The outer wall of the left end of the first cylinder 1-1 is threadedly connected, and a first piston rod through hole 1-3-1 is provided in the middle of the left side wall of the adjustment sleeve 1-3. The first piston 1-2 is arranged in the inner cavity of the first cylinder 1-1, and the piston rod at the left end of the first piston 1-2 extends outward from the first piston rod through hole 1-3-1. A horizontal oil passage 1-2-1 is provided in the middle of the first piston 1-2. The pressure gauge 1-4 is arranged on the left side of the first piston 1-2 and is connected to the oil passage 1-2-1.

[0028] The second hydraulic adjustment device 3 includes a motor connecting flange 3-1, a bearing sleeve 3-2, a bearing retaining ring 3-3, a plurality of bearings 3-4, a second cylinder 3-5 and a second piston 3-6. The motor connecting flange 3-1 is fixedly arranged on the right end face of the driving motor 2. A rotating shaft through hole 3-1-1 is arranged in the middle of the motor connecting flange 3-1. The bearing sleeve 3-2 is installed on the right side of the motor connecting flange 3-1. The second cylinder 3-5 is arranged in the bearing sleeve 3-2. The second piston 3-6 is arranged in the inner cavity of the second cylinder 3-5. The outer wall of the second cylinder 3-5 is provided with a rotating shaft through hole 3-1-1. The second cylinder 3-5 is connected to the bearing sleeve 3-2 through a plurality of bearings 3-4 and rotates relative to the bearing sleeve 3-2. The bearing retaining ring 3-3 is arranged on the right end surface of the bearing sleeve 3-2 and the inner diameter of the bearing retaining ring 3-3 is smaller than the outer diameter of the bearing 3-4. The right protruding end of the rotating shaft 2-1 passes through the rotating shaft through hole 3-1-1 of the motor connecting flange 3-1 and then extends into the inner cavity of the second cylinder 3-5 from the left side wall of the second cylinder 3-5. The second cylinder 3-5 is fixedly connected to the right protruding end of the rotating shaft 2-1, and the inner cavity of the second cylinder 3-5 is communicated with the through hole 2-2.

[0029] The cutter disc device 4 comprises a cutter disc flange 4-1, a fixed cutter disc 4-2, a movable cutter disc 4-3, an inner circle cutting blade 4-4 and an annular pressure plate 4-5, wherein the fixed cutter disc 4-2 is a horizontally arranged cylindrical guide sleeve, the cutter disc flange 4-1 is connected to the left end face of the fixed cutter disc 4-2, the annular pressure plate 4-5 is arranged on one side of the right end face of the fixed cutter disc 4-2 and is connected to the fixed cutter disc 4-2 through connecting bolts, the movable cutter disc 4-3 is a cylindrical cylinder body with an opening at one end, the movable cutter disc 4-3 is horizontally arranged in the inner cavity of the fixed cutter disc 4-2, the open end of the movable cutter disc 4-3 is close to one side of the annular pressure plate 4-5, the horizontal width of the movable cutter disc 4-3 is a matching size with the horizontal width of the fixed cutter disc 4-2, the outer diameter of the movable cutter disc 4-3 is consistent with the inner diameter of the fixed cutter disc 4-2, and the mounting edge of the inner circle cutting blade 4-4 is arranged between the annular pressure plate 4-5 and the fixed cutter disc 4-2;

[0030] A second piston rod through hole 4-1-1 is provided in the middle of the cutter disc flange 4-1, and an annular boss 4-1-2 matching the second piston 3-6 is provided on the left side wall of the cutter disc flange 4-1 and the circumferential direction of the second piston rod through hole 4-1-1. The cutter disc flange 4-1 is arranged on the right side of the second hydraulic adjustment device 3 and is connected to the right end face of the second cylinder barrel 3-5 through bolts, and the annular boss 4-1-2 extends into the inner cavity of the second cylinder barrel 3-5, and the piston rod at the right end of the second piston 3-6 passes through the second piston rod through hole 4-1-1 and is connected to the movable cutter disc 4-3; a butterfly spring 5 is installed at the contact between the end face of the cutter disc flange 4-1 and the end face of the second piston 3-6;

[0031] Hydraulic oil is contained in the oil passage 1-2-1, the first cylinder 1-1, the through hole 2-2 and the cavity of the second cylinder 3-5.

[0032] Furthermore, a first sealing ring 6 is installed at the contact point between the inner wall of the first cylinder 1-1 and the left extended end of the rotating shaft 2-1.

[0033] Furthermore, two sets of round nuts are installed on the left outer wall of the left extended end of the rotating shaft 2-1 to fix the first cylinder 1-1.

[0034] Furthermore, a first retaining ring 7 is provided at the left end of the first cylinder 1 - 1 .

[0035] Furthermore, a second sealing ring 8 is installed at the contact point between the inner wall of the second cylinder 3-5 and the right extended end of the rotating shaft 2-1.

[0036] Furthermore, a round nut is installed on the outer wall of the left end of the second cylinder 3-5 to axially fix the bearing 3-4.

[0037] Furthermore, the bearings 3-4 are provided in three groups, and bearing adjustment pads 9 are provided between the bearings.

[0038] Furthermore, the second cylinder 3 - 5 is fixedly mounted on the right protruding end of the rotating shaft 2 - 1 through a tightening sleeve.

[0039] Working process of the present invention:

[0040] The driving motor 2 is a pair of coaxial double-output shaft motors, and a through hole 2-2 is provided in the rotating shaft 2-1, and the through hole 2-2 connects the left and right sides. The oil passage 1-2-1, the first cylinder 1-1, the through hole 2-2 and the cavity of the second cylinder 3-5 are filled with hydraulic oil, and the pressure value displayed by the pressure gauge 1-4 is observed and recorded;

[0041] The driving motor 2 starts to work, the rotating shaft 2-1 rotates, and the first hydraulic adjustment device 1 on the left side rotates along with the rotation of the rotating shaft 2-1. The motor connecting flange 3-1, the bearing sleeve 3-2 and the bearing retaining ring 3-3 on the right side are stationary. The second cylinder 3-5 is fixedly connected to the right protruding end of the rotating shaft 2-1 through a tightening sleeve. The second cylinder 3-5 rotates along with the rotating shaft 2-1. The cutter disc flange 4-1 is connected to the right end face of the second cylinder 3-5 through bolts. Under the rotation of the second cylinder 3-5, the cutter disc flange 4-1, the fixed cutter disc 4-2, the inner circle cutting blade 4-4 and the annular pressure plate 4-5 are driven to rotate at the same time, and the inner circle cutting blade 4-4 starts to work for cutting.

[0042] After the inner circle cutting blade 4-4 has been working for a period of time, if the pressure gauge 1-4 changes, it means that the inner circle cutting blade 4-4 has become loose, and the adjusting sleeve 1-3 is screwed inward to push the first piston 1-2 to move. Under the action of the hydraulic oil, the second piston 3-6 is pushed to squeeze the butterfly spring 5, and the moving cutter disc 4-3 is connected to the piston rod at the right end of the second piston 3-6, that is, the moving cutter disc 4-3 moves to the right with the second piston 3-6, and the moving cutter disc 4-3 squeezes the inner circle cutting blade 4-4 located at the front in a full circle, and then adjusts the inner circle cutting blade 4-4 to be evenly stretched and straightened, thereby ensuring the cutting efficiency and quality.

Claims

1. An internal cutting power head with a hydraulic adjustment device, characterized in that: The invention comprises a first hydraulic adjustment device (1), a drive motor (2), a second hydraulic adjustment device (3) and a cutter head device (4) which are arranged in sequence from left to right; the drive motor (2) is a coaxial double-shaft motor, and a through hole (2-2) is arranged in the middle of the rotating shaft (2-1) of the drive motor (2) along the axial direction; The first hydraulic adjustment device (1) comprises a first cylinder (1-1), a first piston (1-2), an adjustment sleeve (1-3) and a pressure gauge (1-4); the left protruding end of the rotating shaft (2-1) extends from the right side wall of the first cylinder (1-1) into the inner cavity of the first cylinder (1-1); the left protruding end of the rotating shaft (2-1) is fixedly connected to the first cylinder (1-1); the inner cavity of the first cylinder (1-1) is connected to the through hole (2-2) of the rotating shaft (2-1); the adjustment sleeve (1-3) is arranged on the left side of the first cylinder (1-1); the right side of the adjustment sleeve (1-3) is connected to the inner cavity of the first cylinder (1-1); The inner wall of the end is threadedly connected with the outer wall of the left end of the first cylinder (1-1); a first piston rod through hole (1-3-1) is provided in the middle of the left side wall of the adjustment sleeve (1-3); the first piston (1-2) is arranged in the inner cavity of the first cylinder (1-1), and the piston rod at the left end of the first piston (1-2) extends outward from the first piston rod through hole (1-3-1); a horizontal oil passage (1-2-1) is provided in the middle of the first piston (1-2); the pressure gauge (1-4) is arranged on the left side of the first piston (1-2) and is connected to the oil passage (1-2-1); The second hydraulic adjustment device (3) comprises a motor connection flange (3-1), a bearing sleeve (3-2), a bearing retaining ring (3-3), a plurality of bearings (3-4), a second cylinder (3-5) and a second piston (3-6); the motor connection flange (3-1) is fixedly arranged on the right end surface of the drive motor (2); a rotating shaft through hole (3-1-1) is arranged in the middle of the motor connection flange (3-1); the bearing sleeve (3-2) is installed on the right side of the motor connection flange (3-1); the second cylinder (3-5) is arranged in the bearing sleeve (3-2); the second piston (3-6) is arranged in the inner cavity of the second cylinder (3-5); and the outer wall of the second cylinder (3-5) is provided with a rotating shaft through hole (3-1-1). The second cylinder (3-5) is connected to the bearing sleeve (3-2) through a plurality of bearings (3-4) and rotates relative to the bearing sleeve (3-2); the bearing retaining ring (3-3) is arranged on the right end surface of the bearing sleeve (3-2) and the inner diameter of the bearing retaining ring (3-3) is smaller than the outer diameter of the bearing (3-4); the right protruding end of the rotating shaft (2-1) passes through the rotating shaft through hole (3-1-1) of the motor connecting flange (3-1) and then extends into the inner cavity of the second cylinder (3-5) from the left side wall of the second cylinder (3-5); the second cylinder (3-5) is fixedly connected to the right protruding end of the rotating shaft (2-1), and the inner cavity of the second cylinder (3-5) is communicated with the through hole (2-2); The cutter disc device (4) comprises a cutter disc flange (4-1), a fixed cutter disc (4-2), a movable cutter disc (4-3), an inner circular cutting blade (4-4) and an annular pressure plate (4-5); the fixed cutter disc (4-2) is a horizontally arranged cylindrical guide sleeve; the cutter disc flange (4-1) is connected to the left end face of the fixed cutter disc (4-2); the annular pressure plate (4-5) is arranged on one side of the right end face of the fixed cutter disc (4-2) and is connected to the fixed cutter disc (4-2) via connecting bolts; the movable cutter disc (4-3) is an open end The movable cutter disc (4-3) is horizontally arranged in the inner cavity of the fixed cutter disc (4-2), the open end of the movable cutter disc (4-3) is close to one side of the annular pressure plate (4-5), the horizontal width of the movable cutter disc (4-3) and the horizontal width of the fixed cutter disc (4-2) are matching dimensions, the outer diameter of the movable cutter disc (4-3) and the inner diameter of the fixed cutter disc (4-2) are consistent in size, and the mounting edge of the inner circle cutting blade (4-4) is installed between the annular pressure plate (4-5) and the fixed cutter disc (4-2); A second piston rod through hole (4-1-1) is provided in the middle of the cutter disc flange (4-1); an annular boss (4-1-2) matching with the second piston (3-6) is provided on the left side wall of the cutter disc flange (4-1) and in the circumferential direction of the second piston rod through hole (4-1-1); the cutter disc flange (4-1) is provided on the right side of the second hydraulic adjustment device (3) and is connected to the right end face of the second cylinder barrel (3-5) by bolts; the annular boss (4-1-2) extends into the inner cavity of the second cylinder barrel (3-5); the piston rod at the right end of the second piston (3-6) passes through the second piston rod through hole (4-1-1) and is connected to the movable cutter disc (4-3); a butterfly spring (5) is installed at the contact point between the end face of the cutter disc flange (4-1) and the end face of the second piston (3-6); Hydraulic oil is contained in the oil passage (1-2-1), the first cylinder barrel (1-1), the through hole (2-2) and the cavity of the second cylinder barrel (3-5).

2. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: A first sealing ring (6) is installed at the contact point between the inner wall of the first cylinder (1-1) and the left extended end of the rotating shaft (2-1).

3. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: Two sets of round nuts are installed on the left end outer wall of the left extended end of the rotating shaft (2-1) to fix the first cylinder (1-1).

4. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: A first retaining ring (7) is provided at the left end of the first cylinder (1-1).

5. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: A second sealing ring (8) is installed at the contact point between the inner wall of the second cylinder (3-5) and the right extended end of the rotating shaft (2-1).

6. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: A round nut is installed on the outer wall of the left end of the second cylinder (3-5) to axially fix the bearing (3-4).

7. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: The bearings (3-4) are provided in three groups, and bearing adjustment pads (9) are provided between the bearings.

8. The internal cutting power head with a hydraulic adjustment device according to claim 1, characterized in that: The second cylinder (3-5) is fixedly sleeved on the right protruding end of the rotating shaft (2-1) via a tightening sleeve.

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