A quick coupling device for a drill

Abstract

A quick connecting device for a drilling machine, comprising a locking body, a retaining frame connected to the locking body, a plurality of needle rollers connected to the retaining frame, and a fixing shell connected to the locking body, wherein the locking body is provided with a first limiting groove and a plurality of cam grooves, the retaining frame is provided with a plurality of second limiting grooves, the cam grooves are uniformly distributed around the central axis of the locking body, the first limiting groove is in communication with the cam grooves, the first limiting groove and the retaining frame are matched in shape and size, the needle rollers are matched with the second limiting grooves in cross-sectional shape and size, the number of the needle rollers is the same as that of the cam grooves and the second limiting grooves, and the number of the cam grooves is greater than or equal to three.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, and in particular to a quick-connect device for a drilling machine. Background Technology

[0002] The main function of a drilling machine is to drive the drill bit to break the rock at the bottom of the hole and to lower or lower the drill bit into or out of the hole. A drilling machine includes a drilling machine body, a joint connected to the drilling machine body, and a drill bit connected to the joint. During drilling, different drill bits need to be selected according to the required hole diameter. In the existing technology, the connection methods between the joint and the drill bit include threaded connection and pin fixing connection. Among them, the traditional threaded connection method can ensure the reliability of the drill bit connection, but when frequently changing drill bits, it is necessary to use tools to repeatedly tighten or loosen the threads, which is cumbersome and time-consuming and can easily affect the construction efficiency. In addition, although the pin fixing connection method can slightly improve the efficiency of disassembling and assembling the drill bit compared to the threaded connection method, it still has certain limitations. For example, after the drill bit is severely worn, the positioning hole on the drill bit may not be accurately aligned with the positioning hole on the joint. In addition, the connection method between the outer shell and the locking part on the joint is similar, resulting in low disassembly and assembly efficiency and difficulty in ensuring the structural stability of the joint. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a quick-connect device for drilling machines that can improve assembly and disassembly efficiency and ensure stable connection structures between the connector and the drill bit, as well as between the locking element and the housing.

[0004] The technical solution of this utility model is as follows: A quick-connect device for a drilling machine includes a locking body, a retainer connected to the locking body, a plurality of needle rollers connected to the retainer, and a fixed housing connected to the locking body. The locking body is provided with a first limiting groove and a plurality of cam grooves. The retainer is provided with a plurality of second limiting grooves. The cam grooves are evenly distributed around the central axis of the locking body. The first limiting groove communicates with the cam grooves. The shape and size of the first limiting groove are adapted to the retainer. The cross-sectional shape and size of the needle rollers are adapted to the second limiting grooves. The number of needle rollers is the same as the number of cam grooves and second limiting grooves. The number of cam grooves is greater than or equal to three.

[0005] Using the above technical solution, firstly, the needle rollers are sequentially placed into the second limiting groove of the retainer. Then, the retainer is placed into the locking body, ensuring that each needle roller is located in the gap between the cam groove and the retainer. Since the width of one end of the cam groove is greater than the width of the other end, when placing the retainer, the needle rollers are first placed at the end with the larger width of the cam groove. Then, the fixing housing is placed on the locking body, and the drill bit is inserted into the retainer. Then, the drilling machine is turned on to drive the locking housing to rotate. Due to inertia, the retainer is initially in a stationary state. Therefore, when the locking housing rotates, the inner wall of the cam groove will push the needle rollers towards the center of the retainer until the needle rollers contact the drill bit, thereby clamping the needle rollers between the drill bit and the inner wall of the locking body. Multiple needle rollers position the drill bit, ensuring the positional stability of the drill bit. When the drilling machine stops working, the locking body loses its rotational force, and the clamping force of the needle rollers on the drill bit weakens, allowing the user to quickly remove the drill bit. Compared with traditional drilling machines, this greatly improves the efficiency of changing drill bits, thereby improving work efficiency.

[0006] Further features of this invention: The locking body has several fixing holes, and each fixing hole has a return spring connected to the fixing hole and a slider connected to the return spring. The shape and size of the fixing hole and the slider are adapted to each other. When the return spring is compressed to a certain extent, the slider can be completely inserted into the fixing hole. The inner wall of the fixing housing has several fixing grooves. The depth at both ends of the fixing groove is less than the depth of the middle part of the fixing groove. The two adjacent fixing grooves are not connected. The fixing grooves and fixing holes are evenly distributed with the central axis of the locking body as the axis.

[0007] Using the above technical solution, when it is necessary to install the fixed housing, firstly, the return spring and the slider are placed into the fixing hole, then the slider is pressed into the fixing hole, and then the fixing groove on the fixed housing is aligned with the position of the fixing hole, and the fixed housing is pressed down so that the fixing groove covers the fixing hole. One end of the slider slides into the fixing groove by the reaction force of the return spring, thereby ensuring the stability of the position between the locking body and the fixed housing. When it is necessary to disassemble the fixed housing, it is only necessary to rotate the fixed housing. Since the depth at both ends of the fixing groove is less than the depth of the middle part of the fixing groove, the slider can be pulled out of the fixing groove until the slider is pressed against the inner wall of the fixed housing, and then the fixed housing can be pulled out. This can achieve quick disassembly of the fixed housing, which greatly improves the disassembly efficiency compared with the traditional joint device.

[0008] A further feature of this invention is that it includes a wave-shaped gasket located between the locking body and the retainer, wherein the outer diameter of the wave-shaped gasket is adapted to the inner diameter of the locking body.

[0009] By adopting the above technical solution, since the wave-shaped gasket is located between the locking body and the retainer, the connection tightness between the retainer and the fixed housing can be improved, thereby improving the overall structural stability of the device and reducing the failure rate of the equipment.

[0010] A further feature of this invention is that the fixed housing is provided with a first positioning groove, and the retainer is provided with a plurality of second positioning grooves at one end near the fixed housing. The shape and size of the first positioning groove are adapted to the shape and size of the retainer at the end near the fixed housing.

[0011] By adopting the above technical solution, since the fixed housing is provided with a first positioning groove and the retainer is provided with a number of second positioning grooves at one end near the fixed housing, when installing the fixed housing, the end of the retainer needs to be inserted into the first positioning groove, thereby further ensuring the positional stability between the fixed housing and the retainer, thereby improving the overall structural stability of the device and reducing the failure rate of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a quick-connect device for a drilling machine according to a specific embodiment of the present invention.

[0013] Figure 2 This is a schematic diagram of the unfolded state of a quick-connect device for a drilling machine according to a specific embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of the structure of the fixed housing in a quick-connect device for a drilling machine according to a specific embodiment of the present invention.

[0015] 1-Locking body, 2-Cage, 3-Needle roller, 4-Fixed housing, 5-First limiting groove, 6-Cam groove, 7-Second limiting groove, 8-Fixing hole, 9-Reset spring, 10-Slider, 11-Fixing groove, 12-Wave wave washer, 13-First positioning groove, 14-Second positioning groove. Detailed Implementation

[0016] like Figure 1-3As shown, a quick-connect device for a drilling machine includes a locking body 1, a retainer 2 connected to the locking body 1, a plurality of needle rollers 3 connected to the retainer 2, and a fixed housing 4 connected to the locking body 1. The locking body 1 is provided with a first limiting groove 5 and a plurality of cam grooves 6. The retainer 2 is provided with a plurality of second limiting grooves 7. The cam grooves 6 are evenly distributed around the central axis of the locking body 1. The first limiting groove 5 communicates with the cam grooves 6. The shape and size of the first limiting groove 5 are adapted to the retainer 2. The cross-sectional shape and size of the needle rollers 3 are adapted to the second limiting grooves 7. The number of needle rollers 3 is the same as the number of cam grooves 6 and the number of second limiting grooves 7. The number of cam grooves 6 is greater than or equal to three.

[0017] First, place the needle rollers 3 sequentially into the second limiting groove 7 of the retainer 2. Then, place the retainer 2 into the locking body 1, ensuring that each needle roller 3 is located in the gap between the cam groove 6 and the retainer 2. Since the width of one end of the cam groove 6 is greater than the width of the other end, when placing the retainer 2, first ensure that the needle roller 3 is located at the wider end of the cam groove 6. Then, cover the locking body 1 with the fixing housing 4, then insert the drill bit into the retainer 2, and then start the drilling machine to rotate the locking housing. Due to inertia, the retainer 2 is initially in a stationary state. Therefore, when the locking housing rotates, the inner wall of the cam groove 6 pushes the needle roller 3 towards the center of the retainer 2 until the needle roller 3 contacts the drill bit, thereby clamping the needle roller 3 between the drill bit and the inner wall of the locking body 1. Multiple needle rollers 3 position the drill bit, which can ensure the positional stability of the drill bit. When the drilling machine stops working, the locking body 1 loses its rotational force, and the clamping force of the needle roller 3 on the drill bit weakens, so that the user can quickly remove the drill bit. Compared with traditional drilling machines, this greatly improves the efficiency of changing drill bits, thereby improving work efficiency.

[0018] The locking body 1 has several fixing holes 8. A return spring 9 and a slider 10 connected to the return spring 9 are provided on the fixing holes 8. The shape and size of the fixing holes 8 and the slider 10 are adapted to each other. When the return spring 9 is compressed to a certain extent, the slider 10 can be completely inserted into the fixing hole 8. The inner wall of the fixing housing 4 has several fixing grooves 11. The depth of the two ends of the fixing groove 11 is less than the depth of the middle part of the fixing groove 11. The two adjacent fixing grooves 11 are not connected. The fixing grooves 11 and the fixing holes 8 are evenly distributed with the central axis of the locking body 1 as the axis.

[0019] When the fixed housing 4 needs to be installed, first, the return spring 9 and the slider 10 are placed into the fixing hole 8. Then, the slider 10 is pressed into the fixing hole 8. Next, the fixing groove 11 on the fixed housing 4 is aligned with the position of the fixing hole 8, and the fixed housing 4 is pressed down so that the fixing groove 11 covers the fixing hole 8. One end of the slider 10 slides into the fixing groove 11 by the reaction force of the return spring 9, which can ensure the stability of the position between the locking body 1 and the fixed housing 4. When the fixed housing 4 needs to be disassembled, the fixed housing 4 only needs to be rotated. Since the depth of the two ends of the fixing groove 11 is less than the depth of the middle part of the fixing groove 11, the slider 10 can be pulled out of the fixing groove 11 until the slider 10 is pressed against the inner wall of the fixed housing 4. Then the fixed housing 4 can be pulled out. This can achieve quick disassembly of the fixed housing 4, which greatly improves the disassembly efficiency compared with the traditional joint device.

[0020] It also includes a wave-shaped gasket 12, which is located between the locking body 1 and the retainer 2, and the outer diameter of the wave-shaped gasket 12 is adapted to the inner diameter of the locking body 1.

[0021] Since the wave-shaped gasket 12 is located between the locking body 1 and the retainer 2, it can improve the tightness of the connection between the retainer 2 and the fixed housing 4, thereby improving the overall structural stability of the device and reducing the failure rate of the equipment.

[0022] The fixed housing 4 is provided with a first positioning groove 13, and the retainer 2 is provided with a plurality of second positioning grooves 14 near the fixed housing 4. The shape and size of the first positioning groove 13 are adapted to the shape and size of the retainer 2 near the fixed housing 4.

[0023] Since the fixed housing 4 is provided with a first positioning groove 13 and the retainer 2 is provided with a number of second positioning grooves 14 near the fixed housing 4, when installing the fixed housing 4, the end of the retainer 2 needs to be inserted into the first positioning groove 13, so as to further ensure the positional stability between the fixed housing 4 and the retainer 2, thereby improving the overall structural stability of the device and reducing the failure rate of the equipment.

Claims

1. A quick-connect device for a drilling machine, characterized in that: The device includes a locking body, a retainer connected to the locking body, a plurality of needle rollers connected to the retainer, and a fixed housing connected to the locking body. The locking body has a first limiting groove and a plurality of cam grooves. The retainer has a plurality of second limiting grooves. The cam grooves are evenly distributed around the central axis of the locking body. The first limiting groove communicates with the cam grooves. The shape and size of the first limiting groove are adapted to the retainer. The cross-sectional shape and size of the needle rollers are adapted to the second limiting grooves. The number of needle rollers is the same as the number of cam grooves and second limiting grooves. The number of cam grooves is greater than or equal to three.

2. A quick-connect device for a drilling machine according to claim 1, characterized in that: The locking body has several fixing holes, and a return spring and a slider connected to the return spring are provided on the fixing holes. The shape and size of the fixing holes and the slider are adapted to each other. When the return spring is compressed to a certain extent, the slider can be completely inserted into the fixing hole. The inner wall of the fixing housing has several fixing grooves. The depth of the two ends of the fixing groove is less than the depth of the middle part of the fixing groove. The two adjacent fixing grooves are not connected. The fixing grooves and fixing holes are evenly distributed with the central axis of the locking body as the axis.

3. A quick-connect device for a drilling machine according to claim 1, characterized in that: It also includes a wave-shaped gasket, which is located between the locking body and the retainer, and the outer diameter of the wave-shaped gasket is adapted to the inner diameter of the locking body.

4. A quick-connect device for a drilling machine according to claim 1, characterized in that: The fixed housing is provided with a first positioning groove, and the retainer is provided with a plurality of second positioning grooves near the fixed housing end. The shape and size of the first positioning groove are adapted to the shape and size of the retainer near the fixed housing end.

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