Slip type power head for drilling tool

Abstract

The utility model discloses a slip type power head for a drilling tool, and relates to the technical field of power heads. The device comprises a transmission case, a main shaft, a clamping sleeve body, a plurality of slip pieces, an inner sliding sleeve and an inner taper sleeve, one end of the clamping sleeve body is integrally connected with a step section through a connecting plate, the caliber of the step section is smaller than that of the clamping sleeve body, the end of the step section is fixed to one side of the transmission case through a flange and a fastener, and the main shaft is rotationally arranged in the transmission case and the clamping sleeve body. By means of the design of the inner sliding sleeve, a sealed oil cavity can be formed in the clamping sleeve, the front-back position of the inner sliding sleeve in the clamping sleeve can be controlled through hydraulic pressure, the clamping sleeve moves axially and does not interfere with the main shaft, and meanwhile the inner taper sleeve is matched with the slip piece with the upper surface being an inclined face, so that the clamping sleeve is not prone to falling off. The radial movement of the slip piece can be adjusted in the axial adjustment process of the inner taper sleeve, the leakage problem can be avoided under the condition that normal driving of the slip piece is ensured, and therefore the transmission efficiency of the power head is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power heads, in particular to a slip-type power head for drilling tools. Background Art

[0002] Reference Figure 3 It is a structural cross-sectional view of an existing power head. The main shaft of the existing power head is a hollow shaft body used for inserting and positioning the drill rod. The oil is input through the liquid supply pipe 16, and the oil is input into the pressure chamber 8 through the oil circuit 14, so as to suppress the slip and lock the drill. The rotation of the drill can be driven by driving the main shaft.

[0003] Since the position of the liquid supply pipe 16 is fixed but the main shaft needs to make a rotational motion, a gap seal 15 is used between the liquid supply pipe 16 and the main shaft to transmit power. However, the gap seal 15 will have a certain leakage problem during operation, resulting in a problem of reduced subsequent transmission efficiency.

[0004] Therefore, designing a power head device with high transmission efficiency is a problem that needs to be solved by workers in this field. Utility Model Content

[0005] The purpose of the utility model is to provide a cava type power head for drilling tools. Through the design of the inner sleeve, a sealed oil chamber can be formed in the clamping sleeve. The front and rear positions of the inner sleeve in the clamping sleeve can be controlled by hydraulic pressure. The clamping sleeve moves axially without interfering with the main shaft. At the same time, through the cooperation of the inner tapered sleeve and the cava member with an inclined upper surface, the radial movement of the cava member can be adjusted during the axial adjustment of the inner tapered sleeve, ensuring that leakage problems can be avoided when the cava member is driven normally, thereby improving the transmission efficiency of the power head.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a slip-type power head for drilling tools, comprising a transmission box, a main shaft, a clamping sleeve, a plurality of slips, an inner sliding sleeve and an inner cone sleeve;

[0008] One end of the clamping sleeve is integrally connected with a stage through a connecting plate, the diameter of the stage is smaller than the clamping sleeve, and the end of the stage is fixed to one side of the transmission box through a flange and a fastener;

[0009] The main shaft is rotatably arranged in the transmission box and the clamping sleeve, a front cover is fixed to the end of the main shaft, and a front rotary seal is arranged between the front cover and the end of the clamping sleeve;

[0010] A mounting opening is provided on the inner side of one end of the inner sleeve, an inner guide sleeve is provided on the other end of the inner sleeve, the small end of the inner cone sleeve is located in the mounting opening and an inner bearing is provided between them, and a plurality of sliding grooves are provided on the inner wall of the inner cone sleeve;

[0011] The peripheral side surface of the main shaft close to one end of the front cover is provided with a plurality of preset openings, and the plurality of slip members are respectively slidably arranged in the plurality of preset openings;

[0012] A plurality of sliding ends are fixed on the upper surface of the slip member, and the slip member is slidably arranged in the inner cone sleeve through the sliding ends and the slide grooves. The upper surface of the slip member is an inclined surface and slides along the inner wall of the inner cone sleeve;

[0013] The inner sleeve is slidably arranged in the clamping sleeve body near one end of the stage, the inner guide sleeve is slidably arranged between the main shaft and the stage, an oil cavity is formed between the inner sleeve, the inner guide sleeve, the clamping sleeve body and the connecting plate, and a liquid supply port connected to the oil cavity is provided on the connecting plate;

[0014] A plurality of coil springs are fixed between the front cover and the end of the inner cone sleeve, and the positions of the plurality of coil springs and the plurality of slips are misaligned.

[0015] Furthermore, the sliding end head comprises a pan head screw, and the pan head screw is vertically fixed on the upper surface of the slip member, and a spacer ring is provided between the screw head end of the pan head screw and the slip member.

[0016] Furthermore, the cross section of the slide groove is a T-shaped structure, the screw head end of the pan head screw slides along the wide groove portion of the slide groove, and the spacer slides along the narrow groove portion of the slide groove.

[0017] Furthermore, a motor is fixed on the outside of the transmission box, an output end of the motor passes through the side of the transmission box and is connected with a transmission tooth, and a large gear meshing with the transmission tooth is fixed on the peripheral side of the main shaft.

[0018] Furthermore, the transmission box is provided with a through opening on the side away from the motor, a cover plate is provided on the outside of the through opening, a core shaft is provided at the axis of the transmission gear, one end of the core shaft is rotatably connected to the through opening through a bearing, and the other end of the core shaft is connected to the output end of the motor through a key.

[0019] Furthermore, an oil outlet screw plug is fixed to the bottom surface of the transmission box, and an inspection box cover is fixed to the top of the transmission box via fasteners, and a vent cap is provided on the inspection box cover.

[0020] Furthermore, the main shaft passes through the side wall of the transmission box at one end close to the transmission box, a bearing is provided at the point where the main shaft passes through the side wall of the transmission box, and a rear rotating seal is provided between the stage and the main shaft.

[0021] Furthermore, a clearance groove is provided on the front cover, the inner cone sleeve is opposite to the clearance groove, and an oil filling cup is provided on the front cover.

[0022] Furthermore, sealing grooves are provided on the circumferential sides of the inner sliding sleeve and the inner guide sleeve, and sealing elements are provided in the sealing grooves.

[0023] The utility model has the following beneficial effects:

[0024] 1. The utility model can form a sealed oil chamber in the clamping sleeve through the design of the inner sleeve, and the front and rear positions of the inner sleeve in the clamping sleeve can be controlled by hydraulic pressure. The clamping sleeve moves axially without interfering with the main shaft. At the same time, through the cooperation of the inner tapered sleeve and the cava member with an inclined upper surface, the radial movement of the cava member can be adjusted during the axial adjustment of the inner tapered sleeve, ensuring that leakage problems can be avoided when the cava member is driven normally, thereby improving the transmission efficiency of the power head.

[0025] 2. The utility model installs the helical spring for resetting between the cover plate and the inner cone sleeve, and the cover plate and the inner cone sleeve move synchronously with the main shaft, thereby ensuring the stability and service life of the helical spring.

[0026] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a structural schematic diagram of a slip-type power head for drilling tools of the utility model;

[0029] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0030] Figure 3 It is a structural cross-sectional view of an existing power head;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1-transmission box, 2-spindle, 3-clamping sleeve, 4-slip piece, 5-inner sliding sleeve, 6-inner cone sleeve, 7-sliding end, 8-oil chamber, 9-helical spring, 10-motor, 11-transmission gear, 12-core shaft, 13-rear rotary seal, 14-oil circuit, 15-gap seal, 16-liquid supply pipe, 101-port, 102-cover plate, 103-oil outlet screw plug, 104-inspection box cover, 105-vent cap, 201-front cover, 202-front rotary seal, 203-preset port, 204-large gear, 205-allowance groove, 206-oil filling cup, 301-connecting plate, 302-stage, 501-installation port, 502-inner guide sleeve, 503-inner bearing, 504-seal, 601-slide groove, 701-pan head screw, 702-spacer, 801-liquid supply port. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1-2 As shown, the utility model is a slip-type power head for drilling tools, comprising a transmission box 1, a main shaft 2, a clamping sleeve 3, a plurality of slips 4, an inner sliding sleeve 5 and an inner cone sleeve 6;

[0035] One end of the clamping sleeve 3 is integrally connected to a stage 302 through a connecting plate 301. The diameter of the stage 302 is smaller than that of the clamping sleeve 3. The end of the stage 302 is fixed to one side of the transmission box 1 through a flange and fasteners.

[0036] The main shaft 2 is rotatably arranged in the transmission box 1 and the clamping sleeve 3, a front cover 201 is fixed to the end of the main shaft 2, and a front rotary seal 202 is arranged between the front cover 201 and the end of the clamping sleeve 3;

[0037] An installation opening 501 is provided on the inner side of one end of the inner sleeve 5, an inner guide sleeve 502 is provided on the other end of the inner sleeve 5, the small end of the inner cone sleeve 6 is located in the installation opening 501 and an inner bearing 503 is provided between them, and a plurality of slide grooves 601 are provided on the inner wall of the inner cone sleeve 6;

[0038] A plurality of preset openings 203 are provided on the peripheral side surface of the main shaft 2 near one end of the front cover 201, and a plurality of slip members 4 are slidably disposed in the plurality of preset openings 203;

[0039] A plurality of sliding ends 7 are fixed on the upper surface of the slip member 4. The slip member 4 is slidably arranged in the inner cone sleeve 6 through the sliding ends 7 and the slide groove 601. The upper surface of the slip member 4 is an inclined surface and slides along the inner wall of the inner cone sleeve 6.

[0040] The inner sleeve 5 is slidably disposed in the clamping sleeve body 3 near one end of the stage 302, the inner guide sleeve 502 is slidably disposed between the spindle 2 and the stage 302, an oil chamber 8 is formed between the inner sleeve 5, the inner guide sleeve 502, the clamping sleeve body 3 and the connecting plate 301, and a liquid supply port 801 communicating with the oil chamber 8 is provided on the connecting plate 301;

[0041] A plurality of coil springs 9 are fixed between the front cover 201 and the end of the inner cone sleeve 6 , and the plurality of coil springs 9 and the plurality of slip members 4 are misaligned.

[0042] Among them Figure 1-2 As shown, the sliding end 7 includes a pan head screw 701 , which is vertically fixed to the upper surface of the slip member 4 , and a spacer ring 702 is provided between the screw head end of the pan head screw 701 and the slip member 4 .

[0043] Among them Figure 1-2 As shown, the cross section of the slide groove 601 is a T-shaped structure, the screw head end of the pan head screw 701 slides along the wide groove portion of the slide groove 601, and the spacer 702 slides along the narrow groove portion of the slide groove 601.

[0044] Among them Figure 1 As shown, a motor 10 is fixed on the outside of the transmission box 1, the output end of the motor 10 passes through the side of the transmission box 1 and is connected to the transmission gear 11, and a large gear 204 meshing with the transmission gear 11 is fixed on the side of the main shaft 2.

[0045] Among them Figure 1 As shown, a through opening 101 is provided on the side of the transmission box 1 away from the motor 10, a cover plate 102 is provided on the outside of the through opening 101, a core shaft 12 is provided on the axis of the transmission tooth 11, one end of the core shaft 12 is rotatably connected to the through opening 101 through a bearing, and the other end of the core shaft 12 is connected to the output end of the motor 10 through a key.

[0046] Among them Figure 1 As shown, an oil outlet plug 103 is fixed to the bottom surface of the transmission box 1, and an inspection box cover 104 is fixed to the top of the transmission box 1 through fasteners, and a vent cap 105 is provided on the inspection box cover 104.

[0047] Among them Figure 1 As shown, the main shaft 2 passes through the side wall of the transmission box 1 at one end close to the transmission box 1 , a bearing is provided at the point where the main shaft 2 passes through the side wall of the transmission box 1 , and a rear rotary seal 13 is provided between the stage 302 and the main shaft 2 .

[0048] Among them Figure 1As shown, a clearance groove 205 is provided on the front cover 201 , the inner cone sleeve 6 is opposite to the clearance groove 205 , and an oil filling cup 206 is provided on the front cover 201 .

[0049] Among them Figure 1 As shown, sealing grooves are provided on the circumferential sides of the inner sliding sleeve 50 and the inner guide sleeve 502, and sealing members 504 are provided in the sealing grooves.

[0050] The working principle of the utility model is:

[0051] The pressurized oil is input into the oil chamber 8 through the liquid supply port 801. The pressure in the oil chamber 8 increases, thereby pushing the inner sliding sleeve 5 and the inner guide sleeve 502 to slide in the direction of the inner tapered sleeve 6, thereby driving the inner tapered sleeve 6 to slide in the direction of the front cover 201. With the cooperation of the slide groove 601 and the sliding end 7, the inner tapered sleeve 6 can be driven to slide along the preset port 203 toward the axial direction of the main shaft 2, so that the drill rod can be locked through the inner tapered sleeve 6, thereby realizing the locking connection between the main shaft 2 and the drill rod.

[0052] The motor 10 starts to drive the core shaft 12 and the transmission gear 11 to rotate, and the power can be transmitted to the main shaft 2 through the meshing of the transmission gear 11 and the large gear 204, and the power of the main shaft 2 is transmitted to the drilling tool to drive the drilling tool.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A slip-type power head for drilling tools, comprising a transmission box (1), a main shaft (2), a clamping sleeve (3) and a plurality of slips (4), characterized in that: It also includes an inner sliding sleeve (5) and an inner conical sleeve (6); One end of the clamping sleeve (3) is integrally connected to a stage (302) via a connecting plate (301); the diameter of the stage (302) is smaller than that of the clamping sleeve (3); and the end of the stage (302) is fixed to one side of the transmission box (1) via a flange and a fastener; The main shaft (2) is rotatably arranged in the transmission box (1) and the clamping sleeve (3); a front cover (201) is fixed to the end of the main shaft (2); and a front rotary seal (202) is provided between the front cover (201) and the end of the clamping sleeve (3); A mounting opening (501) is provided on the inner side of one end of the inner sliding sleeve (5), an inner guide sleeve (502) is provided on the other end of the inner sliding sleeve (5), a small end of the inner tapered sleeve (6) is located in the mounting opening (501) and an inner bearing (503) is provided therebetween, and a plurality of sliding grooves (601) are provided on the inner wall of the inner tapered sleeve (6); A plurality of preset openings (203) are provided on the peripheral side surface of the main shaft (2) close to one end of the front cover (201), and a plurality of the slip members (4) are respectively slidably arranged in the plurality of preset openings (203); A plurality of sliding ends (7) are fixed on the upper surface of the slip member (4); the slip member (4) is slidably arranged in the inner cone sleeve (6) through the sliding ends (7) and the slide groove (601); the upper surface of the slip member (4) is an inclined surface and slides along the inner wall of the inner cone sleeve (6); The inner sliding sleeve (5) is slidably arranged in the clamping sleeve body (3) near one end of the stage (302); the inner guide sleeve (502) is slidably arranged between the main shaft (2) and the stage (302); an oil chamber (8) is formed between the inner sliding sleeve (5), the inner guide sleeve (502), the clamping sleeve body (3) and the connecting plate (301); and a liquid supply port (801) is provided on the connecting plate (301) and is communicated with the oil chamber (8); A plurality of coil springs (9) are fixed between the front cover (201) and the end of the inner cone sleeve (6), and the plurality of coil springs (9) and the plurality of slip members (4) are misaligned in position.

2. A slip-type power head for drilling tools according to claim 1, characterized in that: The sliding end (7) comprises a pan head screw (701), and the pan head screw (701) is vertically fixed on the upper surface of the slip member (4). A spacer (702) is provided between the screw head end of the pan head screw (701) and the slip member (4).

3. A slip-type power head for drilling tools according to claim 2, characterized in that: The cross section of the slide groove (601) is a T-shaped structure, the screw head end of the pan head screw (701) slides along the wide groove portion of the slide groove (601), and the spacer (702) slides along the narrow groove portion of the slide groove (601).

4. A slip-type power head for drilling tools according to claim 1, characterized in that: A motor (10) is fixed on the outside of the transmission box (1); an output end of the motor (10) passes through the side of the transmission box (1) and is connected to a transmission tooth (11); a large gear (204) meshing with the transmission tooth (11) is fixed on the peripheral side of the main shaft (2).

5. A slip-type power head for drilling tools according to claim 4, characterized in that: The transmission box (1) is provided with a through opening (101) on a side away from the motor (10), a cover plate (102) is provided outside the through opening (101), a core shaft (12) is provided at the axis of the transmission gear (11), one end of the core shaft (12) is rotatably connected to the through opening (101) via a bearing, and the other end of the core shaft (12) is connected to the output end of the motor (10) via a key.

6. The slip-type power head for drilling tools according to claim 1, characterized in that: An oil outlet screw plug (103) is fixed to the bottom surface of the transmission box (1), and an inspection box cover (104) is fixed to the top of the transmission box (1) via a fastener, and a vent cap (105) is provided on the inspection box cover (104).

7. The slip-type power head for drilling tools according to claim 1, characterized in that: The main shaft (2) passes through the side wall of the transmission box (1) at one end close to the transmission box (1); a bearing is provided at the point where the main shaft (2) passes through the side wall of the transmission box (1); and a rear rotary seal (13) is provided between the stage (302) and the main shaft (2).

8. The slip-type power head for drilling tools according to claim 1, characterized in that: The front cover (201) is provided with a clearance groove (205), the inner cone sleeve (6) is located opposite to the clearance groove (205), and the front cover (201) is provided with an oil filling cup (206).

9. The slip-type power head for drilling tools according to claim 1, characterized in that: The inner sliding sleeve (5) and the inner guide sleeve (502) are both provided with sealing grooves on their circumferential sides, and sealing members (504) are provided in the sealing grooves.

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