Multi-oil-cylinder drill rod clamping structure

Abstract

The invention discloses a multi-oil-cylinder drill rod clamping structure, and belongs to the technical field of engineering machinery. A multi-oil-cylinder drill rod clamping structure comprises a slip clamping seat and a slip seat. A plurality of clamping driving mechanisms, a central shaft, spherical clamping keys and bearing seats are arranged between the slip clamping seats and the slip seats; the central shaft is inserted into one sides of the output ends of the clamping driving mechanisms and is in running fit with the slip clamping seats; the spherical clamping keys are mounted at one ends, far away from the central shaft, of the clamping driving mechanisms; the bearing seats are in running fit with the spherical clamping keys and are connected with the slip seats; the multiple clamping driving mechanisms are distributed around the center line of the slip bowl in a circumferential array mode. According to the multi-oil-cylinder drill rod clamping structure, the multiple hydraulic oil cylinders are arranged and distributed around the center line of the slip bowl in the circumferential array mode, the hydraulic oil cylinders are evenly distributed, the applied force is even and strong, the process of inserting connection between the slip clamping seat and the slip bowl is smoother, the clamped slip clamping seat and the clamped slip bowl are tightly connected, and the clamping effect is good. And loosening is not easy.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engineering machinery, and particularly relates to a multi-oil-cylinder drill rod clamping structure. BACKGROUND

[0002] Engineering machinery is widely used in the fields of construction engineering, transportation construction, energy industry construction and production, raw material industry construction and production such as mining, agricultural and water conservancy construction, industrial and civil building, city construction, and environmental protection.

[0003] When some components are used, in order to facilitate subsequent actions, a controllable clamping component needs to be used for clamping, such as a slip clamping seat and a slip seat. The above components need to be able to be pressed together and also need to be able to be separated. At present, a single oil cylinder is mostly used to clamp the above components, and the following problems exist. The clamping force on the slip clamping seat and the slip seat is small, the force distribution is uneven, the components are easily displaced, and the movement of the internal components of the slip clamping seat is hindered. Therefore, the application provides a multi-oil-cylinder drill rod clamping structure. SUMMARY

[0004] The purpose of the application is to provide a multi-oil-cylinder drill rod clamping structure to solve the problem that the use of a single oil cylinder to clamp the slip clamping seat and the slip seat results in a small clamping force on the slip clamping seat and the slip seat, uneven force distribution, easy displacement of the components, and hindering of the movement of the internal components of the slip clamping seat.

[0005] To achieve the above purpose, the application provides the following technical scheme. A multi-oil-cylinder drill rod clamping structure includes a slip clamping seat and a slip seat. A plurality of clamping drive mechanisms are arranged between the slip clamping seat and the slip seat. A central shaft is arranged on one side of the output end of the clamping drive mechanism and rotationally cooperates with the slip clamping seat. A spherical key is installed at the end of the clamping drive mechanism away from the central shaft. A bearing seat is movably connected with the spherical key and connected with the slip seat. The plurality of clamping drive mechanisms are circumferentially arrayed around the center line of the slip seat. The inner side of the slip clamping seat is sequentially provided with a first straight pipe portion, an inner conical portion, and a second straight pipe portion. First and second planes are respectively arranged at the first and second straight pipe portions. The slip seat is provided with an outer conical portion that cooperates with the inner conical portion.

[0006] Preferably, the bearing seat is provided with an end cover that is pressed at the spherical key. The end cover is provided with a first oil injection hole for injecting lubricating oil. An oil cup is arranged at the first oil injection hole for sealing.

[0007] Preferably, the clamping drive mechanism is provided with four clamping drive mechanisms that are distributed in a square shape.

[0008] Preferably, the slip seat is provided with a slip seat key.

[0009] Preferably, the bearing seat and the slip seat are provided with a bearing cover, one end of the bearing cover abuts against the outer wall of the bearing seat, the other end of the bearing cover abuts against the slip seat, and the bearing cover and the bearing seat are fixedly connected through screws.

[0010] Preferably, the slip seat is provided with two groups of rectangular broken line springs, and the slip seat is provided with a plurality of arc slips which are distributed in a circumferential array around the center line of the slip seat.

[0011] Preferably, the side of the slip seat away from the slip seat is provided with a circular plate abutting against the outer wall of the slip seat, a lower gear ring inserted with the circular plate, a spline sleeve abutting against the outer wall of the lower gear ring, and a connecting flange abutting against the outer wall of the spline sleeve, and the circular plate, the lower gear ring and the spline sleeve are fixedly connected through screws.

[0012] Preferably, the spline sleeve and the lower gear ring are provided with a key, one end of the key abuts against the outer wall of the lower gear ring, and the other end of the key abuts against the outer wall of the spline sleeve.

[0013] Preferably, the slip seat and the slip seat are inserted with a main shaft at the middle position, the slip seat is provided with a driving seat for driving the main shaft, the driving seat is provided with a middle gear coaxial with the center line of the main shaft, the middle gear is provided with a driving gear connected through tooth engagement transmission, and the driving gear is provided with a driving motor for providing power.

[0014] Preferably, the bearing seat is provided with a cover, the cover abuts against the outer wall of the bearing seat, the inner side of the bearing seat is provided with a bearing for reducing friction, the bearing seat is provided with a second oil injection hole for aligning the bearing, the second oil injection hole is provided with a plunger for sealing, the inner side of the bearing is provided with a positioning plate, one end of the positioning plate abuts against the outer wall of the slip seat, and the positioning plate and the cover are fixedly connected through fastening screws.

[0015] Beneficial effects: Firstly, the present application provides a multi-oil-cylinder drill rod clamping structure, a plurality of hydraulic cylinders are arranged, and the plurality of hydraulic cylinders are distributed in a circumferential array around the center line of the slip seat, one end of the hydraulic cylinder is rotatably connected with the slip seat and the slip seat through a center shaft and the like, and the other end of the hydraulic cylinder is movably connected with the slip seat and the slip seat through a spherical key and a bearing seat, so that the hydraulic cylinder has sufficient freedom during the pressure exertion process, the hydraulic cylinders are uniformly distributed, the exertion force is uniform and strong, and the insertion process between the slip seat and the slip seat is more smooth.

[0016] Secondly, the multi-oil-cylinder drill rod clamping structure provided by the application is characterized in that a plurality of hydraulic oil cylinders are arranged, and the plurality of hydraulic oil cylinders are arranged in a circumferential array around the center line of the slip seat; one end of each of the hydraulic oil cylinders is rotationally connected with the slip clamping seat and the slip seat through a central shaft and the like, and the other end of each of the hydraulic oil cylinders is movably connected with the slip clamping seat and the slip seat through a spherical clamping key and a bearing seat; in this way, the hydraulic oil cylinders have sufficient degrees of freedom during the process of exerting pressure, the hydraulic oil cylinders are uniformly distributed, the exerted force is uniform and strong, and the process of inserting the slip clamping seat and the slip seat is more smooth, and the slip clamping seat and the slip seat are tightly connected after being clamped and are not prone to loosening. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic view of the multi-oil-cylinder drill rod clamping structure in the application; Figure 2 FIG. 2 is a left view of the multi-oil-cylinder drill rod clamping structure in the application; Figure 3 FIG. 3 is a structural schematic view of the clamping driving mechanism and the bearing seat in the application; Figure 4 FIG. 4 is a structural schematic view of the bearing cover in the application; Figure 5 FIG. 5 is a structural schematic view of the circular plate, the lower gear ring and the clamping key in the application; Figure 6 FIG. 6 is a structural schematic view of the slip clamping seat and the slip seat in the application; Figure 7 FIG. 7 is a structural schematic view of the arc-shaped slip in the application; Figure 8 FIG. 8 is a structural schematic view of the driving seat in the application.

[0018] BRIEF DESCRIPTION OF DRAWINGS 1, central shaft; 2, clamping driving mechanism; 3, bearing seat; 4, spherical clamping key; 5, end cover; 6, oil cup; 7, bearing cover; 8, rectangular broken line spring; 9, arc-shaped slip; 10, slip clamping seat; 1001, first straight pipe part; 1002, inner conical part; 1003, second straight pipe part; 1004, slip seat clamping key; 11, slip seat; 1101, outer conical part; 12, circular plate; 13, lower gear ring; 14, clamping key; 15, spline sleeve; 16, connecting flange; 17, driving seat; 18, intermediate gear; 19, driving gear; 20, cover; 21, bearing; 22, fastening screw; 23, positioning plate; 24, oil seal. DETAILED DESCRIPTION

[0019] The specific embodiments of the application are described in detail below, but it should be understood that the protection scope of the application is not limited by the specific embodiments.

[0020] Example 1

[0021] As shown in Figures 1-8 A multi-oil cylinder drill pipe clamping structure, including slip clamping seat 10, slip seat 11, characterized in that, between the slip clamping seat 10 and the slip seat 11 is provided with several clamping drive mechanism 2, the center shaft 1 inserted into the output end of the clamping drive mechanism 2 on one side and rotating with the slip clamping seat 10, the spherical key 4 installed at the end of the clamping drive mechanism 2 away from the center shaft 1, the bearing seat 3 movably matched with the spherical key 4 and connected with the slip seat 11; A plurality of clamping drive mechanisms 2 are distributed around the center line of the slip seat 11; The inner side of the slip clamping seat 10 is sequentially provided with a first straight pipe part 1001, an inner conical part 1002 and a second straight pipe part 1003, and the first straight pipe part 1001 and the second straight pipe part 1003 are respectively provided with a first plane and a second plane; The slip seat 11 is provided with an outer conical part 1101 matched with the inner conical part 1002.

[0022] Example two

[0023] On the basis of example one, the main shaft is inserted into the middle position of the slip clamping seat 10 and the slip seat 11, the drive seat 17 is arranged at the slip clamping seat 10 for driving the main shaft, the intermediate gear 18 is arranged in the drive seat 17 and coincides with the center line of the main shaft, the drive gear 19 is arranged at the intermediate gear 18 and connected through tooth engagement transmission, and the drive motor is arranged at the drive gear 19 for providing power. The bearing seat 3 is provided with a cover 20 abutting against the outer wall of the bearing seat 3, the bearing 21 for reducing friction is arranged on the inner side of the bearing seat 3, the second oil injection hole for aligning the bearing 21 is arranged at the bearing seat 3, the plunger for sealing is arranged at the second oil injection hole, the positioning plate 23 is arranged on the inner side of the bearing 21, one end of the positioning plate 23 abuts against the outer wall of the slip seat 11, and the positioning plate 23 is fixedly connected with the cover 20 through the fastening screw 22.

[0024] Example three

[0025] On the basis of example one, the bearing cover 7 is arranged between the bearing seat 3 and the slip seat 11, one end of the bearing cover 7 abuts against the outer wall of the bearing seat 3, the other end of the bearing cover 7 abuts against the slip seat 11, and the bearing cover 7 is fixedly connected with the bearing seat 3 through the screw; two groups of rectangular broken line springs 8 are arranged in the slip seat 11, and the arc-shaped slips 9 are arranged in the slip seat 11 and distributed around the center line of the slip seat 11. The clamping seat 10 has a circular plate 12 abutting against the outer wall of the clamping seat 10, a lower gear ring 13 inserted into the circular plate 12, a spline sleeve 15 abutting against the outer wall of the lower gear ring 13, and a connecting flange 16 abutting against the outer wall of the spline sleeve 15 on the side away from the clamping seat 11. The circular plate 12, the lower gear ring 13, and the spline sleeve 15 are fixedly connected by screws.

[0026] Example 4

[0027] like Figures 1-8 As shown in the figure, the multi-cylinder drill pipe clamping structure provided in this embodiment of the invention includes a slip clamping seat 10 and a slip seat 11. A plurality of clamping drive mechanisms 2 are arranged between the slip clamping seat 10 and the slip seat 11. A central shaft 1 is inserted into one side of the output end of the clamping drive mechanism 2 and rotates with the slip clamping seat 10. A spherical key 4 is installed at one end of the clamping drive mechanism 2 away from the central shaft 1. A bearing seat 3 is movably engaged with the spherical key 4 and connected to the slip seat 11.

[0028] It should be noted that an end cap 5 is provided at the bearing housing 3, the end cap 5 presses against the spherical key 4, and the end cap 5 is provided with a first oil injection hole for injecting lubricating oil, and an oil cup 6 for sealing is provided at the first oil injection hole.

[0029] Specifically, the clamping drive mechanism 2 can be a hydraulic cylinder with a size of 80. 40 29. Multiple clamping drive mechanisms 2 are arranged in a circular array around the center line of the clamping seat 11. Specifically, there are four clamping drive mechanisms 2, and the four clamping drive mechanisms 2 are arranged in a square.

[0030] Multiple hydraulic cylinders are arranged in a circumferential array around the center line of the slip seat 11. The hydraulic cylinders are connected to the slip clamping seat 10 and the slip seat 11 by rotating components such as the central shaft 1 at one end and moving components such as the spherical key 4 and the bearing seat 3 at the other end. This allows the hydraulic cylinders to have sufficient freedom during the application of pressure, and the hydraulic cylinders are evenly distributed, resulting in uniform and strong force, which makes the insertion process between the slip clamping seat 10 and the slip seat 11 smoother.

[0031] Specifically, the inner side of the slip clamping seat 10 is provided with a first straight tube portion 1001, an inner tapered portion 1002, and a second straight tube portion 1003 in sequence. The first straight tube portion 1001 and the second straight tube portion 1003 are respectively provided with a first plane and a second plane. The first plane is used for mounting components, specifically for mounting the arc-shaped slip 9. The second plane is used to improve the sealing performance at the connection between the slip clamping seat 10 and the slip seat 11. The slip clamping seat 10 is provided with a slip seat key 1004.

[0032] More specifically, the outer conical part 1101 is provided at the card slot 11 and matched with the inner conical part 1002. The inner conical part 1002 and the outer conical part 1101 have the same inclination angle. When the inner conical part 1002 of the card clamping seat 10 is matched with the outer conical part 1101, the card clamping seat 10 and the card slot 11 can be matched with each other. The sealed performance of the card clamping seat 10 and the card slot 11 after pressing is good.

[0033] It should be noted that the bearing cover 7 is provided between the bearing seat 3 and the card slot 11. One end of the bearing cover 7 is abutted against the outer wall of the bearing seat 3, and the other end of the bearing cover 7 is abutted against the card slot 11. The bearing cover 7 and the bearing seat 3 are fixedly connected by screws.

[0034] Specifically, the bearing cover 7 can be referred to as Figure 4 Two groups of rectangular broken line springs 8 are provided in the card slot 11. A plurality of arc-shaped cards 9 are arranged in a circumferential array around the center line of the card slot 11.

[0035] Specifically, the bearing cover 7 can be referred to as Figure 5 The side of the card clamping seat 10 away from the card slot 11 is provided with a circular plate 12 abutted against the outer wall of the card clamping seat 10, a lower gear ring 13 matched with the circular plate 12, a spline sleeve 15 abutted against the outer wall of the lower gear ring 13, and a connecting flange 16 abutted against the outer wall of the spline sleeve 15. It should be noted that the spline sleeve 15 and the lower gear ring 13 are provided with a clamping key 14. One end of the clamping key 14 is abutted against the outer wall of the lower gear ring 13, and the other end of the clamping key 14 is abutted against the outer wall of the spline sleeve 15.

[0036] It should be noted that the circular plate 12, the lower gear ring 13, and the spline sleeve 15 are fixedly connected by screws.

[0037] Specifically, the main shaft is inserted into the middle position of the card clamping seat 10 and the card slot 11. The driving seat 17 for driving the main shaft is provided at the card clamping seat 10. The intermediate gear 18 is provided in the driving seat 17 and coincides with the center line of the main shaft. The driving gear 19 is provided at the intermediate gear 18 and is connected by tooth engagement transmission. The driving motor is provided at the driving gear 19 for providing power. The driving gear 19 is provided with two, and the two driving gears 19 are respectively located on both sides of the intermediate gear 18.

[0038] The bearing cover 7 can be referred to as Figure 4 The cover 20 is provided at the bearing seat 3 and abutted against the outer wall of the bearing seat 3. The bearing 21 for reducing friction is provided inside the bearing seat 3. The bearing 21 is a tapered roller bearing. The second oil injection hole for aligning the bearing 21 is provided at the bearing seat 3. The plunger for sealing is provided at the second oil injection hole. The positioning plate 23 is provided inside the bearing 21. One end of the positioning plate 23 is abutted against the outer wall of the card slot 11. The positioning plate 23 and the cover 20 are fixedly connected by the fastening screw 22.

[0039] It should be noted that the bearing 21 is provided with an oil seal 24 which is clamped into the bearing seat 3.

[0040] In summary, the multi-oil-cylinder drill rod clamping structure provided by the embodiment of the present application has the following advantages: the hydraulic cylinders are arranged in a plurality of and are distributed in a circumferential array around the center line of the slip seat 11, and one end of the hydraulic cylinder is rotatably connected with the slip clamping seat 10 and the slip seat 11 through the central shaft 1 and the like, and the other end is movably connected with the slip clamping seat 10 and the slip seat 11 through the spherical clamping key 4 and the bearing seat 3, so that the hydraulic cylinder has sufficient freedom during the process of exerting pressure, and the hydraulic cylinders are uniformly distributed, and the exerted force is uniform and strong, so that the process of inserting the slip clamping seat 10 and the slip seat 11 is more smooth.

[0041] In summary, the multi-oil-cylinder drill rod clamping structure provided by the embodiment of the present application has the following advantages: the hydraulic cylinders are arranged in a plurality of and are distributed in a circumferential array around the center line of the slip seat 11, and one end of the hydraulic cylinder is rotatably connected with the slip clamping seat 10 and the slip seat 11 through the central shaft 1 and the like, and the other end is movably connected with the slip clamping seat 10 and the slip seat 11 through the spherical clamping key 4 and the bearing seat 3, so that the hydraulic cylinder has sufficient freedom during the process of exerting pressure, and the hydraulic cylinders are uniformly distributed, and the exerted force is uniform and strong, so that the process of inserting the slip clamping seat 10 and the slip seat 11 is more smooth.

[0042] The above disclosure is only several specific embodiments of the present application, but the embodiments of the present application are not limited thereto, and any changes that can be thought of by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A multi-cylinder drill rod clamping structure, comprising a slip clamping seat (10) and a slip seat (11), characterized in that, A plurality of clamping drive mechanisms (2), a central shaft (1) inserted into the output end of the clamping drive mechanism (2) and rotatingly engaged with the clamping seat (10), a spherical key (4) installed at the end of the clamping drive mechanism (2) away from the central shaft (1), and a bearing seat (3) movably engaged with the spherical key (4) and connected to the clamping seat (11) are provided between the clamping seat (10) and the clamping seat (11). Multiple clamping drive mechanisms (2) are arranged in a circumferential array around the center line of the clamp seat (11); The inner side of the clamping seat (10) is provided with a first straight tube section (1001), an inner conical section (1002), and a second straight tube section (1003) in sequence. The first straight tube section (1001) and the second straight tube section (1003) are respectively provided with a first plane and a second plane. The slip seat (11) is provided with an outer conical part (1101) that mates with the inner conical part (1002).

2. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, An end cap (5) is provided at the bearing housing (3), the end cap (5) is pressed against the spherical key (4), and the end cap (5) is provided with a first oil injection hole for injecting lubricating oil, and an oil cup (6) for sealing is provided at the first oil injection hole.

3. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, The clamping drive mechanism (2) is provided in four parts, and the four clamping drive mechanisms (2) are distributed in a square shape.

4. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, The slip clamping seat (10) is provided with a slip seat key (1004).

5. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, A bearing cover (7) is provided between the bearing housing (3) and the slip seat (11). One end of the bearing cover (7) abuts against the outer wall of the bearing housing (3), and the other end of the bearing cover (7) abuts against the slip seat (11). The bearing cover (7) and the bearing housing (3) are fixedly connected by screws.

6. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, The slip seat (11) is provided with two sets of rectangular snap-wire springs (8), and the slip seat (11) is provided with a number of arc-shaped slips (9) arranged in a circular array around the center line of the slip seat (11).

7. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, The side of the clamping seat (10) away from the clamping seat (11) is provided with a circular plate (12) abutting against the outer wall of the clamping seat (10), a lower gear ring (13) inserted into the circular plate (12), a spline sleeve (15) abutting against the outer wall of the lower gear ring (13), and a connecting flange (16) abutting against the outer wall of the spline sleeve (15). The circular plate (12), the lower gear ring (13), and the spline sleeve (15) are fixedly connected by screws.

8. The multi-cylinder drill rod clamping structure as described in claim 7, characterized in that, A retaining key (14) is provided between the spline sleeve (15) and the lower gear ring (13). One end of the retaining key (14) abuts against the outer wall of the lower gear ring (13), and the other end of the retaining key (14) abuts against the outer wall of the spline sleeve (15).

9. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, A main shaft is inserted at the middle position between the clamping seat (10) and the clamping seat (11). A drive seat (17) for driving the main shaft is provided at the clamping seat (10). An intermediate gear (18) that coincides with the center line of the main shaft is provided inside the drive seat (17). A drive gear (19) connected by gear meshing transmission is provided at the intermediate gear (18). A drive motor for providing power is provided at the drive gear (19).

10. The multi-cylinder drill rod clamping structure as described in claim 1, characterized in that, A cover (20) is provided at the bearing housing (3), and the cover (20) abuts against the outer wall of the bearing housing (3). A bearing (21) for reducing friction is provided on the inner side of the bearing housing (3). A second oil injection hole for aligning the bearing (21) is provided at the bearing housing (3). A plunger for sealing is provided at the second oil injection hole. A positioning plate (23) is provided on the inner side of the bearing (21). One end of the positioning plate (23) abuts against the outer wall of the slip seat (11). The positioning plate (23) and the cover (20) are fixedly connected by fastening screws (22).

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