Water drilling machine connector

Abstract

The invention provides a water drilling machine connector which comprises a main body connected with a water drilling machine, a water flow channel is arranged in the main body, an expansion connector is arranged at one end, connected with a drill bit, of the main body, and the expansion connector has an expansion state and a contraction state. When the expansion connector is in a contraction state, the expansion connector and the drill bit are freely pulled out. The drill bit connector has the advantages that the connector capable of expanding freely is arranged at the end, connected with the drill bit, of the connector body, so that the drill bit can be rapidly disassembled by controlling the connector of the connector to contract in the radial direction when the drill bit is disassembled, and the drill bit is basically not affected by rusting.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling equipment, in particular to a connector for a water drilling machine. Background Art

[0002] A water drill is a drilling device. The connector of the existing water drill includes a male end and a female end, which are respectively connected to the drill bit and the water drill body, and then the male end and the female end are butted. For example, a quick adapter for a water drill disclosed in announcement number CN217439982U includes a male connector and a female connector, wherein the male connector is connected to the drill bit. The drill bit has different sizes for different requirements and needs to be replaced frequently. Since the male connector is made of iron and the water drill works in a humid environment for a long time, the male connector and the drill bit are often stuck, which makes it difficult to disassemble the male connector and the drill bit. If a male connector is connected to each drill bit, it will cause waste and extremely high cost. Summary of the invention

[0003] The technical problem to be solved by the present invention is how to design a connector of a water drilling machine to prevent rust between the connector and the drill bit and prevent it from being difficult to disassemble.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A water drill connector comprises a main body connected to the water drill, a water flow channel is arranged in the main body, an expansion connector is arranged at one end of the main body connected to a drill bit, the expansion connector has an expansion state and a contraction state, when the expansion connector is in the expansion state, it is connected and fixed to the drill bit, when the expansion connector is in the contraction state, the expansion connector and the drill bit can be freely pulled out.

[0006] Preferably, a driving mechanism for driving the expansion connector to switch between an expanded state and a contracted state is provided in the main body.

[0007] Preferably, the driving mechanism includes a movable rod for pushing the expansion connector, a gear mechanism for driving the movable rod to rotate, and a spiral track mechanism for driving the movable rod to reciprocate, wherein the movable rod is provided with a water flow channel that runs through the movable rod, and the gear driving mechanism drives the movable rod to rotate while the spiral track mechanism drives the movable rod to reciprocate.

[0008] Preferably, the movable rod end has a conical structure for pushing the expansion connector to switch from a contracted state to an expanded state, and the expansion connector includes a plurality of threaded blocks that can move radially on the main body, and the main body is provided with a space for radial movement of the threaded blocks, and the outer end of each threaded block has an outwardly protruding thread tooth, and the thread teeth of each threaded block in the expanded state jointly form an external thread that is threadedly connected to the drill bit.

[0009] Preferably, a reset elastic member is provided between the threaded block and the main body, and the threaded block is in a retracted state through the reset elastic member when there is no movable rod pushing it, and the outer surface of the threaded block is flush with or concave in the outer surface of the main body when the threaded block is in the retracted state.

[0010] Preferably, the threaded block is provided with a first fixing portion for fixing or clamping the reset elastic member, and the inner wall of the space of the main body for radial movement of the threaded block is provided with a second fixing portion for fixing or clamping the reset elastic member.

[0011] Preferably, the gear drive mechanism includes a sun gear arranged on a movable rod, a planetary gear movably arranged on the main body, and a driving sleeve having an inner gear ring on the inner wall. The outer surface of the planetary gear is provided with a long tooth structure for axial movement and engagement of the sun gear. The sun gear moves axially along the planetary gear while rotating.

[0012] Preferably, the main body comprises a first part and a second part, wherein the first part is connected to the water drilling rig, the second part is assembled and connected to the first part, the planetary gear is movably connected to the second part, the second part is axially hollow, and a through groove communicating with the inside and outside for the planetary gear to be embedded and movable is provided on the second part, and grooves for the planetary wheel axle to be installed are provided on both sides of the through groove, one end of the groove is open, and one side thereof is communicated with the through groove, and the shafts at both ends of the planetary wheel are overlapped in the groove, and a first retaining ring and a second retaining ring are provided on the outer wall of the second part at the axle positions at both ends of the planetary wheel to prevent the axle from slipping out, the number of the planetary gears is at least three, and they are evenly distributed around the sun gear in an annular shape, and the spiral track mechanism is provided between the inner wall of the second part and the outer wall of the movable rod, and the spiral track mechanism comprises a spiral groove provided on the inner wall of the second part or the outer wall of the movable rod, and a protrusion matching the spiral groove is provided on the outer wall of the movable rod or the inner wall of the second part.

[0013] Preferably, the drive sleeve is sleeved on the outside of the second part, and a movable clamping mechanism is provided between the drive sleeve and the second part. After the drive sleeve is sleeved on the second part, it can and can only rotate along the axis of the second part. A pressure cap is provided at one end of the drive sleeve, and the pressure cap and the drive sleeve are threadedly connected. A spring sheet is provided between the pressure cap and the second part, wherein one end of the spring sheet abuts the second clamping ring, and the other end abuts the pressure cap.

[0014] Preferably, a positioning mechanism is provided between the driving sleeve and the second part, and the positioning mechanism includes a circle of positioning holes provided on the outer wall of the second part, and positioning pieces that can be movably inserted into the positioning holes are threadedly connected at corresponding positions of the driving sleeve.

[0015] The beneficial effect of the present invention is that the present invention provides a freely expandable connector at one end where the connector body is connected to the drill bit, so that when the drill bit is removed, the drill bit can be quickly removed by controlling the radial contraction of the connector connector, and is basically not affected by rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a cross-sectional view of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the first part of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the second part of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the thread block of the present invention;

[0021] Figure 6 is a structural schematic diagram of a resetting elastic member;

[0022] Figure 7 It is a structural schematic diagram of the movable rod;

[0023] Figure 8 is a schematic diagram of the structure of the driving sleeve;

[0024] Fig. 9 It is a schematic diagram of the structure of the gland;

[0025] Fig.10 This is a schematic diagram of the structure of the present invention without the driving sleeve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example

[0028] See also Figure 1-Figure 10, as shown in the figure, is a water drill connector, including a main body 100 connected to the water drill. To facilitate the connection of various parts, the main body 100 in this embodiment includes a first part 101 and a second part 102, wherein the first part 101 is connected to the water drill, and the second part 102 is assembled and connected to the first part 101. This embodiment adopts threaded connection and fixing. The first part 101 and the second part 102 are both hollow structures in the axial direction, one part is used as a water flow channel, and the other part is used as a chamber for installing parts. The first part 101 is provided with an internal thread and is threadedly connected to the water drill. An expansion connector is provided at one end of the second part 102 of the main body 100 connected to the drill bit. The expansion connector has an expanded state and a contracted state. When the expansion connector is in the expanded state, it is connected and fixed to the drill bit. When the expansion connector is in the contracted state, the expansion connector and the drill bit can be freely pulled out. In this embodiment, the expansion connector is a plurality of threaded blocks 110 that can move radially on the main body 100, at least three, and evenly distributed in an annular shape. The main body 100 is provided with a space for the threaded blocks 110 to move radially. The outer end of each threaded block 110 has an outwardly protruding thread tooth, and the thread teeth of each threaded block 110 in the expanded state jointly form an external thread connected to the drill bit thread. Of course, the expansion connector can also be other radially movable structures, such as a clamping structure, and any existing connection method that can achieve transmission between the two should be within the protection scope of this application.

[0029] In the present embodiment, a driving mechanism for driving the expansion connector to switch between the expansion state and the contraction state is provided in the main body 100. The driving mechanism includes a movable rod 120 that pushes the expansion connector, a gear mechanism that drives the movable rod 120 to rotate, and a spiral track mechanism that drives the movable rod 120 to reciprocate, wherein the movable rod 120 is provided with a water flow channel that penetrates the movable rod 120, and the movable rod 120 is movably arranged in the main body 100, that is, the movable rod 120 is arranged in the hollow part between the first part 101 and the second part 102 of the main body 100, and can rotate circumferentially and move axially inside it. In the present embodiment, sealing rings 103 are provided at the contact positions with the first part 101 and the second part 102 on the movable rod 120 respectively to prevent water in the water flow channel from flowing into the gear assembly, and the gear driving mechanism drives the movable rod 120 to rotate while the spiral track mechanism drives the movable rod 120 to reciprocate. The gear drive mechanism in this embodiment includes a sun gear 1201 disposed on a movable rod 120, a planetary gear 130 movably disposed on a main body 100, and a drive sleeve 140 having an inner gear ring 1401 disposed on the inner wall. The outer surface of the planetary gear 130 is provided with a long tooth structure for the sun gear 1201 to axially move and mesh with. The sun gear 1201 moves axially along the planetary gear 130 while rotating. A reset elastic member 150 is disposed between the thread block 110 and the main body 100. The thread block 110 is in a retracted state through the reset elastic member 150 when there is no push from the movable rod 120, and the outer surface of the thread block 110 is flush with or concave to the outer surface of the main body 100 in the retracted state. In this embodiment, the movable rod 120 can be rotated through the planetary gear driving mechanism. Since the rotation of the movable rod 120 is restricted by the spiral track, the movable rod 120 also reciprocates in the main body 100 when rotating. When it runs to one side of the drill bit, it radially pushes the expansion connector so that the expansion connector can cooperate with the drill bit to connect, thereby realizing the assembly connection between the main body 100 and the drill bit. When the drill bit needs to be removed, it is only necessary to reversely screw the drive sleeve 140 to drive the movable rod 120 to retract inward. The expansion connector radially retracts under the action of the reset elastic member 150 without being pushed by the movable rod 120, and the drill bit loses the restriction of the thread and can be easily removed. In this embodiment, the thread has less friction in the radial direction and is easier to detach in the radial direction, thereby preventing the thread from rusting. The design of the planetary gear structure can be more stable when driving the movable rod 120 to rotate.

[0030] In order to install the planetary gear 130 in this embodiment, the planetary gear 130 is movably connected to the second part 102 in this embodiment, and a through groove 1021 that is communicated with the inside and outside for the planetary gear 130 to be embedded and movable is provided on the second part 102. Both sides of the through groove 1021 are provided with grooves 1022 for the axle of the planetary gear 130 to be installed. One end of the groove 1022 is open, and one side thereof is communicated with the through groove 1021. The shafts at both ends of the planetary gear 130 are overlapped in the groove 1022. The outer wall of the second part 102 is located at the axle positions at both ends of the planetary gear 130. A first snap ring 1023 and a second snap ring 1024 are provided to prevent the axle from slipping out. The first snap ring 1023 and the second snap ring The ring 1024 forms a limit piece for fixing the shafts at both ends of the planetary gear 130, so that the planetary gear 130 can only rotate in place. There are at least three planetary gears 130, and they are evenly distributed in a ring around the sun gear 1201. In this embodiment, the sun gear 1201 and the movable rod 120 are an integrated structure, that is, an external tooth structure is provided on the outer wall of the movable rod 120, and a spiral track mechanism is provided between the inner wall of the second part 102 and the outer wall of the movable rod 120. The spiral track mechanism includes a spiral groove 1025 provided on the inner wall of the second part 102 or the outer wall of the movable rod 120, and a protrusion 1202 that cooperates with the spiral groove 1025 is provided on the outer wall of the movable rod 120 or the inner wall of the second part 102.

[0031] The end of the movable rod 120 has a conical structure for pushing the expansion connector to switch from a contracted state to an expanded state. After the corresponding threaded blocks 110 are installed, the inner walls of each threaded block 110 jointly form a conical structure and match the conical structure of the end of the movable rod 120, so that the abutment surfaces of the two can be larger, ensuring the abutment strength, and also ensuring that the external thread of the threaded block 110 can be better combined with the internal thread of the drill bit to ensure the strength of the threaded connection.

[0032] The thread block 110 is provided with a first fixing portion 1101 for fixing or clamping the reset elastic member 150, and the inner wall of the space for the thread block 110 to move radially is provided with a second fixing portion 1026 for fixing or clamping the reset elastic member 150. In this embodiment, the first fixing portion 1101 is a slot formed by two parallel convex ribs, and the reset elastic member 150 is an elastic steel wire, which is clamped in the slot, and the second fixing portion 1026 is a slot concave in the inner wall of the space, and the two ends of the steel wire are respectively abutted in the slot of the inner wall of the space. The reset spring can not only play the role of retracting the thread block 110, but also can automatically slightly adjust and align the internal thread in the drill bit when the thread block 110 is connected with the thread in the drill bit, so that the three thread blocks 110 can be well matched with the thread of the drill bit at a suitable position, so as to prevent the situation where the outermost ends of the two threads are abutted against each other and cannot be threaded. Since the three thread blocks 110 are relatively small in width, the threads on each thread block 110 are close to a helical tooth structure. Since the reset elastic member 150 has a certain elasticity, the thread block 110 automatically squeezes out the best fitting position when matching with the internal thread of the drill bit, forming a better threaded connection.

[0033] The driving sleeve 140 described in this embodiment is sleeved on the outside of the second part 102, and a movable clamping mechanism is provided between the driving sleeve 140 and the second part 102. The movable clamping mechanism is the same as the axial positioning mechanism in the announcement number CN217439982U, which will not be elaborated in detail here. After the driving sleeve 140 is sleeved with the second part 102, it can and can only rotate along the axis of the second part 102. In order to prevent the movable rod 120 from automatically retreating, this embodiment is also provided with a positioning mechanism between the driving sleeve 140 and the second part 102. The positioning mechanism includes a circle of positioning holes 1027 provided on the outer wall of the second part 102, and a positioning piece 1402 that can be movably inserted into the positioning hole is threadedly connected at the corresponding position of the driving sleeve 140. In this embodiment, the positioning piece is a top screw. When the connector is connected to the drill bit, the positioning piece is screwed into the corresponding positioning hole at this time to prevent the driving sleeve 140 from rotating. Since the driving sleeve 140 is fixed and cannot rotate, the movable rod 120 cannot rotate either, thereby locking the movable rod 120. A gland 160 is provided at one end of the driving sleeve 140, and the gland 160 is threadedly connected to the driving sleeve 140, and a spring sheet 170 is provided between the gland 160 and the second portion 102, wherein one end of the spring sheet 170 abuts against the second clamping ring 1024, and the other end abuts against the gland 160. A sealing ring 103 is provided between the gland and the second portion 102. The arrangement of the gland ensures that both ends of the driving sleeve 140 are stably supported to prevent it from shaking.

[0034] In order to prevent sewage from entering the active space of the threaded block from the water flow channel, in this embodiment, a filter net is provided at the end of the second part of the main body or in the water flow channel at the end.

Claims

1. A water drilling rig connector, comprising a main body connected to the water drilling rig, wherein a water flow channel is provided in the main body, and characterized in that: An expansion connector is provided at one end of the main body connected to the drill bit. The expansion connector has an expansion state and a contraction state. When the expansion connector is in the expansion state, it is fixedly connected to the drill bit. When the expansion connector is in the contraction state, the expansion connector and the drill bit can be freely pulled out.

2. A water drilling rig connector as claimed in claim 1, characterized in that: A driving mechanism for driving the expansion connector to switch between an expansion state and a contraction state is arranged in the main body.

3. A water drilling rig connector as claimed in claim 2, characterized in that: The driving mechanism includes a movable rod that pushes the expansion connector, a gear mechanism that drives the movable rod to rotate, and a spiral track mechanism that drives the movable rod to reciprocate, wherein the movable rod is provided with a water flow channel that passes through the movable rod. The gear driving mechanism drives the movable rod to rotate while the spiral track mechanism drives the movable rod to reciprocate.

4. A water drilling rig connector as claimed in claim 3, characterized in that: The movable rod end has a conical structure for pushing the expansion connector to switch from a contracted state to an expanded state. The expansion connector includes a plurality of threaded blocks that can move radially on a main body. A space for radial movement of the threaded blocks is provided on the main body. The outer end of each threaded block has outwardly protruding thread teeth, and the thread teeth of each threaded block in the expanded state jointly form an external thread that is threadedly connected to the drill bit.

5. A water drilling rig connector as claimed in claim 4, characterized in that: A reset elastic member is provided between the thread block and the main body. The thread block is in a retracted state through the reset elastic member when there is no push from the movable rod, and the outer surface of the thread block is flush with or concave in the outer surface of the main body in the retracted state.

6. A water drilling rig connector as claimed in claim 5, characterized in that: The thread block is provided with a first fixing portion for fixing or clamping the reset elastic member, and the inner wall of the space of the main body for the thread block to move radially is provided with a second fixing portion for fixing or clamping the reset elastic member.

7. A water drilling rig connector as claimed in claim 3, characterized in that: The gear drive mechanism includes a sun gear arranged on a movable rod, a planetary gear movably arranged on a main body, and a driving sleeve with an inner gear ring on the inner wall. The outer surface of the planetary gear is provided with a long tooth structure for the axial movement and meshing of the sun gear. The sun gear moves axially along the planetary gear while rotating.

8. A water drilling rig connector as claimed in claim 7, characterized in that: The main body comprises a first part and a second part, wherein the first part is connected to the water drilling machine, the second part is assembled and connected to the first part, the planetary gear is movably connected to the second part, the second part is axially hollow, and a through groove for the planetary gear to be embedded and movable is provided on the second part, and grooves for the planetary gear axle to be installed are provided on both sides of the through groove, one end of the groove is open, and one side thereof is connected to the through groove, and the shafts at both ends of the planetary gear are overlapped in the groove, and a first retaining ring and a second retaining ring are provided on the outer wall of the second part at the axle positions at both ends of the planetary gear to prevent the axle from slipping out, the number of the planetary gears is at least three, and they are evenly distributed around the sun gear in an annular shape, and the spiral track mechanism is provided between the inner wall of the second part and the outer wall of the movable rod, and the spiral track mechanism comprises a spiral groove provided on the inner wall of the second part or the outer wall of the movable rod, and a protrusion matching the spiral groove is provided on the outer wall of the movable rod or the inner wall of the second part.

9. A water drilling rig connector as claimed in claim 8, characterized in that: The driving sleeve is sleeved on the outside of the second part, and a movable clamping mechanism is provided between the driving sleeve and the second part. After the driving sleeve is sleeved on the second part, it can and can only rotate along the axis of the second part. A pressure cap is provided at one end of the driving sleeve, and the pressure cap and the driving sleeve are threadedly connected. A spring sheet is provided between the pressure cap and the second part, wherein one end of the spring sheet abuts the second clamping ring, and the other end abuts the pressure cap.

10. A water drilling rig connector as claimed in claim 9, characterized in that: A positioning mechanism is also provided between the driving sleeve and the second part. The positioning mechanism includes a circle of positioning holes provided on the outer wall of the second part, and a positioning piece which can be movably inserted into the positioning hole is threadedly connected at a corresponding position of the driving sleeve.

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