Hollow rod fixing type telescopic air cylinder and expansion chuck assembly

Abstract

The utility model discloses a hollow rod fixed type telescopic air cylinder and an expansion chuck assembly, the hollow rod fixed type telescopic air cylinder comprises a hollow rod, a piston rod, a cylinder cover, a cylinder body, a first inflation nozzle and a second inflation nozzle, and the expansion chuck assembly comprises a nasal tube, a rear pull ring, a conical tube, an expansion chuck and a rear pull ring driving structure. Compared with an existing method, the hollow rod fixed type telescopic air cylinder is fixed to an external part through the hollow rod, so that the air cylinder is fixed to adapt to more working environments, load conditions, installation spaces and the like; the air cylinder is applied to the expansion chuck assembly, the drill plate is clamped, and the air cylinder serves as a cutting discharge channel.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder structures, and particularly relates to a hollow rod fixed type telescopic cylinder and an expansion chuck assembly. Background Art

[0002] A cylinder is an actuator that converts hydraulic energy or pneumatic energy into mechanical energy and performs linear reciprocating motion or oscillating motion. Common installation forms of cylinders include flange fixed type, tripod fixed type, earring fixed type, and middle swing fixed type. In practical applications, it is necessary to select a suitable cylinder fixing form according to specific working environments, load conditions, installation spaces, etc. to ensure that the cylinder can work normally and stably. At present, the application scenarios of cylinders are relatively narrow. Therefore, it is necessary to develop a new type of cylinder fixing form. Content of the Utility Model

[0003] Utility Model Purpose: To solve the above problems, the utility model fixes the cylinder through a hollow rod and an external part, thereby realizing the fixation of the cylinder, and at the same time increasing the fixing form of the cylinder to adapt to more working environments, load conditions, installation spaces, etc.; this cylinder realizes the function of clamping a drill template and acting as a chip discharge channel.

[0004] Technical Solution: To achieve the above purpose, a hollow rod fixed type telescopic cylinder described in the utility model includes a hollow rod, a piston rod sleeved on the hollow rod, a cylinder head arranged below the piston rod, a cylinder body fixedly connected to the cylinder head, a first air inlet and a second air inlet arranged on the outer side of the cylinder body; the hollow rod, the piston rod, the cylinder head, and the cylinder body are all coaxially arranged. At the same time, the hollow rod penetrates through the piston rod and the cylinder head, and the cylinder body includes the cylinder head and part of the piston rod; the cylinder head is fixedly connected to the hollow rod, and the piston rod slides up and down along the hollow rod; when inflating from the outside into the first air inlet or the second air inlet, the piston rod slides axially forward or backward.

[0005] Further, the inside of the hollow rod is a through hollow structure.

[0006] Further, a linear bearing placed vertically is arranged inside the piston rod.

[0007] Further, the linear bearing is cylindrical.

[0008] Further, a first sealing ring is arranged on the inner ring of the cylinder head, the first sealing ring contacts the hollow rod, and a second sealing ring is arranged on the outer ring of the cylinder head, and the second sealing ring contacts the cylinder body.

[0009] Further, the outer side surface of the cylinder head is in a stepped shape with gradually increasing circles, and both the top surface and the bottom surface of the cylinder head are circular rings, and the diameter of the top surface is smaller than that of the bottom surface.

[0010] Further, a third sealing ring is provided on the inner ring of the lower part of the piston rod. The third sealing ring contacts the hollow rod. A fourth sealing ring is provided on the outer ring of the lower part, and the fourth sealing ring contacts the cylinder block. A fifth sealing ring is provided on the outer ring of the upper part of the piston rod, and the fifth sealing ring contacts the cylinder block.

[0011] Further, the cylinder block and the cylinder head form an air chamber, and the piston rod divides the cylinder into a first air chamber and a second air chamber.

[0012] Further, the first air chamber is a sealed space formed by the inner wall of the cylinder block and the outer wall of the piston rod. The first air chamber is connected to the first inflation nozzle; the second air chamber is a sealed space formed by the bottom of the piston rod, the top of the cylinder head, the outer wall of the hollow rod, and the inner wall of the cylinder block. The second air chamber is connected to the second inflation nozzle; a spring is provided in the first air chamber, and the spring is sleeved on the piston rod.

[0013] An expansion chuck assembly with a hollow rod fixed type telescopic cylinder includes a drill template, a tapered tube sleeved on the drill template, an expansion chuck sleeved on the tapered tube, a rear pull ring sleeved on the expansion chuck, a nose tube sleeved between the rear pull ring and the expansion chuck, and a rear pull ring driving structure; the main body of the nose tube is a hollow cylinder, and the nose tube is coaxially butted with the hollow rod; one end of the rear pull ring driving structure is hinged to the rear pull ring, and the other end is connected to the piston rod.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following remarkable effects: The cylinder is fixed by fixing the hollow rod with external parts; the piston rod slides up and down along the hollow rod to achieve the purpose of bearing torque load; the cylinder is applied to clamp the drill template and act as a cutting discharge channel. Description of the Drawings

[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the hollow rod fixed type telescopic cylinder described in the present invention.

[0016] Figure 2 It is a cross-sectional view of the structure of the hollow rod fixed type telescopic cylinder described in the present invention.

[0017] Figure 3 It is an exploded view of the structure of the hollow rod fixed type telescopic cylinder described in the present invention.

[0018] Figure 4 It is a planar schematic diagram of the structure of the expansion chuck described in the present invention.

[0019] Figure 5 It is a three-dimensional schematic diagram of the structure of the expansion chuck described in the present invention.

[0020] Figure 6 It is a cross-sectional view of the structure of the expansion chuck along the cutting direction described in the present invention. Detailed Embodiments

[0021] The utility model discloses a hollow rod fixed telescopic air cylinder and an expansion chuck assembly. Please refer to Figures 1 to 3As shown, the hollow rod fixed telescopic cylinder provided by the utility model is further described in detail below: the hollow rod fixed telescopic cylinder comprises a vertically arranged hollow rod 12, a piston rod 13 sleeved on the hollow rod 12, a cylinder cover 27 arranged below the piston rod 13, a cylinder body 11 fixedly connected to the cylinder cover 27 by a retaining ring 28, and a first inflation nozzle 15 and a second inflation nozzle 16 arranged on the outside of the cylinder body 11; the hollow rod 12, the piston rod 13, the cylinder cover 27, and the cylinder body 11 are all coaxially arranged, and the hollow rod 12 passes through the piston rod 13 and the cylinder cover 27, and the cylinder body 11 includes the cylinder cover 27 and a part of the piston rod 13; the cylinder cover 27 is locked and fixed to the hollow rod 12 by a locking nut 14 The fixed connection ensures the sealing between the cylinder cover 27 and the hollow rod 12; the piston rod 13 slides up and down along the hollow rod 12, and the piston rod 13 and the outer wall of the hollow rod 12 are constrained by 5 degrees of freedom through the sliding bearing, so that the cylinder can also withstand a certain eccentric load moment along the axial direction of the hollow rod 12 when bearing thrust load, but the piston rod 13 cannot withstand the torsion load without constraint of the sliding bearing; compressed air is passed from the outside to the first inflation nozzle 15, the second inflation nozzle 16 is connected to the atmosphere, and the piston rod 13 slides downward; compressed air is passed from the outside to the second inflation nozzle 16, the first inflation nozzle 15 is connected to the atmosphere, and the piston rod 13 slides upward, achieving the purpose of driving external components. A vertically placed linear bearing 20 is provided in the piston rod 13, and the linear bearing 20 is cylindrical, ensuring that the piston rod 13 can slide linearly along the outer wall of the hollow rod 12, and at the same time, the sealing of the fifth sealing ring 24, the third sealing ring 22 and the fourth sealing ring 23 will not fail due to the change of the movement direction. The hollow rod 12, the piston rod 13, the cylinder cover 27 and the cylinder body 11 are all hollow structures that penetrate through. The upper end of the hollow rod 12 is provided with a threaded interface, which is connected to other objects through the threaded interface; the outer side surface of the cylinder cover 27 is a circle of gradually increasing steps. The top and bottom surfaces of the cylinder cover 27 are both annular, and the top surface diameter is smaller than the bottom surface diameter. The outer side surface is in contact with the cylinder body 11, and the bottom surface of the cylinder cover 27 is connected to the retaining spring 28. The retaining spring 28 is fixed on the cylinder body 11 so that the cylinder cover 27 and the cylinder body 11 do not move; the inner ring of the cylinder cover 27 is provided with a first sealing ring 21, and the first sealing ring 21 is in contact with the hollow rod 12, so that the compressed air in the second air chamber will not flow to the outside through the gap between the cylinder cover 27 and the hollow rod 12. The outer ring of the cylinder cover 27 is provided with a second sealing ring 26, and the second sealing ring 26 is in contact with the cylinder body 11. A third sealing ring 22 is provided on the inner ring of the lower part of the piston rod 13, and the third sealing ring 22 contacts the piston rod 13; a fourth sealing ring 23 is provided on the outer ring of the lower part, and the fourth sealing ring 23 contacts the cylinder body 11; a fifth sealing ring 24 is provided on the outer ring of the upper part of the piston rod 13, and the fifth sealing ring 24 contacts the cylinder body; the first air chamber is separated from the outside by the third sealing ring 22, the fourth sealing ring 23 and the fifth sealing ring 24, and the second air chamber is separated from the outside by the first sealing ring 21, the second sealing ring 26, the third sealing ring 22, the fourth sealing ring 23 and the fifth sealing ring 24.The cylinder block 11 and the cylinder head 27 form an air chamber, and the piston rod 13 divides the air chamber into a first air chamber and a second air chamber; the first air chamber is a sealed space formed by the inner wall of the cylinder block 11 and the outer wall of the piston rod 13, and the first air chamber is connected to the first inflation nozzle 15; the second air chamber is a sealed space formed by the bottom of the piston rod 13, the top of the cylinder head 27, the outer wall of the hollow rod 12 and the inner wall of the cylinder block 11, and the second air chamber is connected to the second inflation nozzle 16. A spring 25 is provided in the first air chamber to restore the piston rod 13 to its original position when not under external air pressure, enabling the cylinder to have a self-resetting performance.

[0022] As Figures 4 to 5 shown, the expansion chuck assembly with a hollow rod fixed type telescopic cylinder provided by the present utility model will be further described in detail below: The expansion chuck part includes a drill template 107, a tapered tube 106 sleeved on the drill template 107, an expansion chuck 105 sleeved on the tapered tube 106, a rear pull ring 104 sleeved on the expansion chuck 105, a nose tube 102 sleeved between the rear pull ring 104 and the expansion chuck 105, and a rear pull ring drive structure 103. Among them, the main body of the nose tube 102 is a hollow cylinder, and the nose tube 102 is coaxially docked with the hollow rod 12; one end of the rear pull ring drive structure 103 is hinged to the rear pull ring 104, and the other end is connected to the piston rod 13. The cylinder 101 is a hollow rod fixed type telescopic cylinder, and the inside of the cylinder 101 is a hollow structure. The cylinder 101 realizes the extension and contraction of the piston rod 13 through the injection of air pressure, thereby driving the extension and contraction of the rear pull ring drive structure 103. This structure drives the rear pull ring 104 to perform forward and backward telescoping along the nose tube 102. During the forward and backward telescoping process of the rear pull ring 104, it drives the expansion chuck 105 to move forward and backward on the surface of the tapered tube 106, thereby realizing the radial expansion and contraction of the expansion chuck 105.

[0023] By injecting air pressure into the first air nozzle 15 of the cylinder 101, the piston rod 13 can be contracted. The piston rod 13 and the rear pull ring drive structure 103 are locked by bolts. Therefore, the rear pull ring drive structure 103 will also contract backward accordingly. The rear pull ring drive structure 103 and the rear pull ring 104 are in a sliding connection. The backward movement of the rear pull ring drive structure 103 will drive the rear pull ring 104 to move backward along the nose tube 102. The tapered tube 106 and the nose tube 102 are in a locked state. The backward movement of the rear pull ring 104 will drive the expansion chuck 105 to move backward along the tapered tube 106. At this time, the tapered tube 106 is in a state of being smaller at the front and larger at the back. That is, during the backward movement of the expansion chuck 105, its radial diameter will gradually expand, thereby realizing the clamping of the expansion chuck 105 and the drill template 107.

[0024] The cylinder 101 can extend the piston rod 13 by injecting air pressure through the second air nozzle 16. The piston rod 13 and the rear pull ring drive structure 103 are locked by bolts. Therefore, the rear pull ring drive structure 103 will also extend backward accordingly. The rear pull ring drive structure 103 is slidably connected to the rear pull ring 104. The backward movement of the rear pull ring drive structure 103 will drive the rear pull ring 104 to move forward along the nasal tube 102. The conical tube 106 and the nasal tube 102 are in a state of threaded locking. The forward movement of the rear pull ring 104 will drive the expansion chuck 105 to move forward along the conical tube 106. Here, the conical tube 106 is in a state of being smaller at the front and larger at the rear. That is, during the backward movement of the expansion chuck 105, its radial diameter will gradually decrease, so as to realize the loosening of the expansion chuck 105 from the drill template 107.

[0025] In addition to driving the expansion chuck 105 to clamp the drill template, the cylinder 101 can also act as a chip discharge channel. The chips generated by drilling can enter the inside of the nasal tube 102 through the inside of the conical tube 106 and be conveyed out of the body through the hollow rod 12. At the same time, the locking nut 14 can be connected to a negative pressure vacuum cleaner to assist in the discharge of chips, as Figure 6 shown.

Claims

1. A hollow rod fixed telescopic cylinder, characterized in that: The invention comprises a hollow rod (12), a piston rod (13) sleeved on the hollow rod (12), a cylinder cover (27) arranged below the piston rod (13), a cylinder body (11) fixedly connected to the cylinder cover (27), and a first inflation nozzle (15) and a second inflation nozzle (16) arranged outside the cylinder body (11); the hollow rod (12), the piston rod (13), the cylinder cover (27) and the cylinder body (11) are all coaxially arranged, and the hollow rod (12) penetrates the piston rod (13) and the cylinder cover (27); the cylinder body (11) comprises the cylinder cover (27) and part of the piston rod (13); the cylinder cover (27) is fixedly connected to the hollow rod (12), and the piston rod (13) slides up and down along the hollow rod (12); when inflating from the outside to the first inflation nozzle (15) or the second inflation nozzle (16), the piston rod (13) slides in the positive or reverse direction along the axial direction.

2. The hollow rod fixed telescopic cylinder according to claim 1, characterized in that: The interior of the hollow rod (12) is a penetrating hollow structure.

3. The hollow rod fixed telescopic cylinder according to claim 1, characterized in that: A vertically placed linear bearing (20) is provided inside the piston rod (13).

4. The hollow rod fixed telescopic cylinder according to claim 3, characterized in that: The linear bearing (20) is cylindrical.

5. The hollow rod fixed telescopic cylinder according to claim 1, characterized in that: The inner ring of the cylinder cover (27) is provided with a first sealing ring (21), the first sealing ring (21) is in contact with the hollow rod (12), and the outer ring of the cylinder cover (27) is provided with a second sealing ring (26), the second sealing ring (26) is in contact with the cylinder body (11).

6. The hollow rod fixed telescopic cylinder according to claim 1, characterized in that: The outer side surface of the cylinder cover (27) is in the shape of a series of gradually increasing steps, the top surface and the bottom surface of the cylinder cover (27) are both in the shape of annular rings, and the diameter of the top surface is smaller than the diameter of the bottom surface.

7. The hollow rod fixed telescopic cylinder according to claim 1, characterized in that: The piston rod (13) is provided with a third sealing ring (22) on the inner ring at the bottom, the third sealing ring (22) is in contact with the hollow rod (12), the piston rod (13) is provided with a fourth sealing ring (23) on the outer ring at the bottom, the fourth sealing ring (23) is in contact with the cylinder body (11), and the piston rod (13) is provided with a fifth sealing ring (24) on the outer ring at the top, the fifth sealing ring (24) is in contact with the cylinder body (11).

8. The hollow rod fixed telescopic cylinder according to claim 1, characterized in that: The cylinder body (11) and the cylinder cover (27) form an air chamber, and the piston rod (13) divides the cylinder into a first air chamber and a second air chamber.

9. The hollow rod fixed telescopic cylinder according to claim 8, characterized in that: The first air chamber is a closed space formed by the inner wall of the cylinder body (11) and the outer wall of the piston rod (13), and the first air chamber is connected to the first inflation nozzle (15); the second air chamber is a closed space formed by the bottom of the piston rod (13), the top of the cylinder cover (27), the outer wall of the hollow rod (12) and the inner wall of the cylinder body (11), and the second air chamber is connected to the second inflation nozzle (16); a spring (25) is provided in the first air chamber, and the spring (25) is sleeved on the piston rod (13).

10. An expansion chuck assembly having a hollow rod fixed telescopic cylinder as claimed in any one of claims 1 to 9, characterized in that: The invention also comprises a drilling template (107), a conical tube (106) sleeved on the drilling template (107), an expansion chuck (105) sleeved on the conical tube (106), a rear pull ring (104) sleeved on the expansion chuck (105), a nose tube (102) sleeved between the rear pull ring (104) and the expansion chuck (105), and a rear pull ring driving structure (103); the nose tube (102) is hollow and cylindrical in shape, and the nose tube (102) is coaxially connected to the hollow rod (12); one end of the rear pull ring driving structure (103) is hinged to the rear pull ring (104), and the other end is connected to the piston rod (13).

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