A quick replacement device for a heading machine drill bit

Abstract

The utility model discloses a kind of quick replacement device of tunneling machine drill bit, belong to tunneling machine technical field, a kind of quick replacement device of tunneling machine drill bit, including upper assembly and lower assembly, upper assembly includes upper connecting piece and the four-jaw chuck of fixed connection in the top of upper connecting piece;Lower assembly includes lower connecting piece and the four-jaw chuck of fixed connection in the bottom of lower connecting piece, lower connecting piece is installed with multiple quick clamps for locking upper assembly and lower assembly.The quick replacement problem of tunneling machine and drill bit is solved, the quick, convenient replacement of drill bit is realized, improves equipment utilization and adaptation flexibility, significantly reduces the labor intensity of worker.

Description

Technical Field

[0001] This utility model relates to a quick-change device for drill bits in tunneling machines, belonging to the field of tunneling machine technology. Background Technology

[0002] In mining and tunneling operations, tunnel boring machines (TBMs) are indispensable heavy machinery. Traditionally, the mechanical arm of a mining TBM is connected to the drill bit using bolts. While this connection method is simple and robust, it has revealed several drawbacks in practical use. Bolted connections require specialized tools for disassembly and assembly, making drill bit replacement cumbersome and time-consuming, thus impacting construction progress and efficiency. Furthermore, the traditional method offers limited compatibility between TBMs and drill bits, lacking flexibility. In addition, frequent disassembly and assembly operations increase the labor intensity of workers and may lead to wear and damage to connecting components, ultimately affecting the equipment's lifespan and safety.

[0003] To address the aforementioned issues, developing a device capable of quickly changing drill bits is of paramount importance. A drill bit quick-change device for tunneling machines aims to overcome the shortcomings of traditional connection methods. Through innovative design, it enables rapid and convenient drill bit replacement, improving equipment utilization and adaptability, significantly reducing the labor intensity of workers, and is of great significance for enhancing the efficiency of mining and tunnel excavation.

[0004] Therefore, developing a quick-change device for tunneling machine drill bits that is simple in structure, easy to operate, and highly reliable is of great value to the current field of mining equipment technology. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a quick replacement device for tunneling machine drill bits, which solves the problem of quick replacement of tunneling machine and drill bits, realizes quick and convenient replacement of drill bits, improves equipment utilization and adaptability, and significantly reduces the labor intensity of workers.

[0006] The technical solution adopted by this utility model to solve its existing problems is:

[0007] A quick-change device for a tunneling machine drill bit includes an upper component and a lower component. The upper component includes an upper connector and a four-jaw chuck fixedly connected to the top of the upper connector.

[0008] The lower assembly includes a lower connector and a four-jaw chuck fixedly connected to the bottom of the lower connector. The lower connector is equipped with multiple quick clamps for locking the upper and lower assemblies together.

[0009] Preferably, the upper connector is provided with a mating shaft and multiple clamping grooves, and the lower connector is provided with a mating hole, the mating shaft extends into the mating hole, and the mating shaft is slidably connected to the mating hole.

[0010] Preferably, the mating shaft is provided with a tapered end and a limiting groove, and the mating hole is provided with a square protrusion and multiple stepped through holes, with the limiting groove and the square protrusion slidably connected.

[0011] Preferably, a limiting component is installed in each step through hole, the limiting component including a limiting rod and a limiting spring sleeved on the limiting rod;

[0012] The limiting rod is slidably connected to the stepped through hole. One end of the limiting rod is provided with a tapered head, which abuts against the mating shaft. The other end of the limiting rod is provided with an arc-shaped end, which extends out of the lower connecting piece. One end of the limiting spring is fixedly connected to the tapered head, and the other end of the limiting spring is fixedly connected to the stepped through hole.

[0013] The limiting rod has a limiting hole at one end of its arc-shaped end.

[0014] Preferably, the quick clamp includes a clamping rod and a clamp handle. The clamping rod abuts against the bottom surface of the clamping groove. The lower end of the clamp handle is provided with a square through groove and a positioning pin mounting hole, and the positioning pin mounting hole is aligned with the limiting hole.

[0015] Preferably, a spring positioning pin is installed in the positioning pin mounting hole, and the lower end of the spring positioning pin extends into the limiting hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This application features a modular design with strong versatility. Simply pulling up or pressing down the clamp handle of the quick-clamping device allows for the tightening or loosening of the tunneling machine and drill bit. The four-jaw chuck configuration enables the clamping of different sized tunneling machine arms and drill bits, expanding the applicability of both the tunneling machine and the drill bit. This allows a single tunneling machine to be compatible with different models of drill bits, and vice versa, enabling quick and convenient drill bit replacement. This improves equipment utilization and adaptability, and significantly reduces the labor intensity of workers. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a quick-change device for a tunneling machine drill bit according to the present invention;

[0019] Figure 2 This is a partial sectional front view of a quick-change device for a tunneling machine drill bit according to the present invention;

[0020] Figure 3This is a partial enlarged view of point A in the partial sectional main view of a quick-change device for a tunneling machine drill bit according to this utility model;

[0021] Figure 4 This is a partial enlarged view of section B in the enlarged view of section A of the quick-change device for a tunneling machine drill bit according to this utility model;

[0022] Figure 5 This is a full sectional top view of a quick-change device for a tunneling machine drill bit according to the present invention;

[0023] Figure 6 This is a structural diagram of the upper connecting part of a quick-change device for a tunneling machine drill bit according to the present invention;

[0024] Figure 7 This is a structural diagram of the lower connecting part of a quick-change device for a tunneling machine drill bit according to the present invention;

[0025] Figure 8 This is a partial sectional front view of the lower connecting part of a quick-change device for a tunneling machine drill bit according to the present invention;

[0026] Figure 9 This is a structural diagram of the quick clamp of a tunneling machine drill bit quick change device according to the present invention.

[0027] In the picture:

[0028] 1. Upper connector, 101. Mating shaft, 102. Tapered end, 103. Limiting groove, 104. Pressing groove; 2. Lower connector, 201. Mating hole, 202. Square protrusion, 203. Stepped through hole; 3. Four-jaw chuck; 4. Quick clamp, 401. Pressing rod, 402. Clamp handle, 403. Square through groove, 404. Positioning pin mounting hole; 5. Limiting assembly, 501. Limiting rod, 50101. Tapered head, 50102. Arc-shaped end, 50103. Limiting hole, 502. Limiting spring; 6. Spring positioning pin, 601. Lifting handle. Detailed Implementation

[0029] This specification and claims do not distinguish components by differences in name, but by differences in function. In the description of this utility model, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In this utility model, unless otherwise expressly specified and limited, terms such as "installed," "connected," "joined," and "fixed" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0030] like Figures 1-9 The diagram shows a quick-change device for a tunneling machine drill bit, comprising an upper assembly and a lower assembly. The upper assembly includes an upper connector 1 and a four-jaw chuck 3 fixedly connected to the top of the upper connector 1. The lower assembly includes a lower connector 2 and a four-jaw chuck 3 fixedly connected to the bottom of the lower connector 2. The lower connector 2 is equipped with multiple quick-clamping clamps 4 for locking the upper and lower assemblies together.

[0031] The upper connecting member 1 is provided with a mating shaft 101 and multiple clamping grooves 104. The mating shaft 101 is provided with a tapered end 102 and a limiting groove 103. The lower connecting member 2 is provided with a mating hole 201, which is provided with a square protrusion 202 and multiple stepped through holes 203. During assembly, the limiting groove 103 and the square protrusion 202 are aligned, the mating shaft 101 extends into the mating hole 201, and the mating shaft 101 is slidably connected to the mating hole 201. The limiting groove 103 and the square protrusion 202 are slidably connected, and the mating groove 103 and the square protrusion 202 restrict the circumferential rotation of the upper connecting member 1 and the lower connecting member 2.

[0032] The stepped through hole 203 includes a large-diameter section and a small-diameter section. A limiting component 5 is installed within each stepped through hole 203. The limiting component 5 includes a limiting rod 501 and a limiting spring 502 sleeved on the limiting rod 501. The limiting rod 501 is slidably connected to the small-diameter section of the stepped through hole 203. One end of the limiting rod 501 has a tapered head 50101 located in the large-diameter section of the stepped through hole 203, abutting against the mating shaft 101. The other end of the limiting rod 501 has an arc-shaped end 50102 extending beyond the lower connecting member 2. One end of the limiting spring 502 is fixedly connected to the tapered head 50101, and the other end is fixedly connected to the stepped end face of the stepped through hole 203. The arc-shaped end 50102 of the limiting rod 501 is provided with a limiting hole 50103.

[0033] The quick clamp 4 includes a clamping rod 401 and a clamp handle 402. The clamping rod 401 abuts against the bottom surface of the clamping groove 104 to lock the upper and lower components. The lower end of the clamp handle 402 is provided with a square through groove 403 and a positioning pin mounting hole 404, which is aligned with the limiting hole 50103. A spring positioning pin 6 is installed in the positioning pin mounting hole 404, and the lower end of the spring positioning pin 6 extends into the limiting hole 50103. The spring positioning pin 6 is provided with a lifting handle 601.

[0034] Figures 1-5 For the connection status of the quick-change device for the tunneling machine drill bit, combined with Figure 3 The quick clamp 4 locks the upper and lower components together, and the cooperating shaft 101 presses the limiting component 5. The limiting spring 502 is in a compressed state. When it is necessary to separate the upper and lower components, lift the lifting handle 601 of the spring positioning pin 6 so that the lower end of the spring positioning pin 6 disengages from the limiting hole 50103. Pull up the clamp handle 402 of the quick clamp 4. The clamp handle 402 rotates clockwise by a certain angle. The clamping rod 401 of the quick clamp 4 rotates counterclockwise by a certain angle. The clamping rod 401 separates from the clamping groove 104. By dragging the lower component by hand, the lower component can be separated from the upper component. At this time, the limiting spring 502 is released. The limiting component 5 is reset under the action of the limiting spring 502. The limiting rod 501 moves as a whole towards the cooperating hole 201, and the conical head 50101 extends into the cooperating hole 201.

[0035] In the operation of a tunneling machine, the upper component is fixed to the machine's robotic arm via a four-jaw chuck 3, and the lower component is fixed to the drill bit via the same four-jaw chuck 3. The four-jaw chuck 3 can clamp robotic arms of different sizes and drill bits of different sizes, expanding the applicability of both the tunneling machine and the drill bit. This allows one tunneling machine to be compatible with different types of drill bits, and vice versa. Each jaw of the four-jaw chuck can move independently, making it particularly suitable for clamping eccentric, non-circular, or irregularly shaped workpieces, such as square, rectangular, and elliptical shapes. Due to its greater clamping force, it is also commonly used to clamp heavier cylindrical workpieces.

[0036] Combination Figure 3 As shown, during operation, the drill bit with the lower component is aligned with the mechanical arm of the tunneling machine with the upper component. The limiting groove 103 of the mating shaft 101 of the upper connecting member 1 is aligned with the square protrusion 202 of the mating hole 201 of the lower connecting member 2. The mating shaft 101 is pushed into the mating hole 201. Because the lower end of the mating shaft 101 has a tapered end 102, during the process of the mating shaft 101 being pushed in, the tapered end 102 and the tapered head 50101 of the limiting rod 501 slide together. The limiting rod 501 is squeezed, and the tapered head 50101 is pushed into the stepped through hole 203. The limiting spring 502 is compressed, and the end of the limiting rod 501 with the arc-shaped end 50102 moves outward. At this time, the clamp handle of the quick clamp 4 is... When 402 is pressed down, the clamp handle 402 rotates counterclockwise to a position perpendicular to the limit rod 501. The clamping rod 401 of the quick clamp 4 rotates clockwise to a position perpendicular to the clamping groove 104 and abuts against the bottom surface of the clamping groove 104, locking the upper and lower components. During the counterclockwise rotation of the clamp handle 402, the lower end of the spring positioning pin 6 slides against the arc-shaped end 50102, and the lower end of the spring positioning pin 6 falls into the limit hole 50103, limiting the clamp handle 402. This prevents the clamp handle 402 from opening during operation, enhancing the safety performance of the quick-change device for the tunneling machine drill bit. As described above, the clamp handles 402 of each quick clamp 4 are pressed down sequentially until the drill bit is finally fixedly connected to the tunneling machine.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A quick-change device for a tunneling machine drill bit, comprising an upper assembly and a lower assembly, characterized in that: The upper component includes an upper connector (1) and a four-jaw chuck (3) fixedly connected to the top of the upper connector (1); The lower component includes a lower connector (2) and a four-jaw chuck (3) fixedly connected to the bottom of the lower connector (2). Multiple quick clamps (4) are installed on the lower connector (2) for locking the upper component and the lower component together.

2. The quick-change device for tunneling machine drill bits according to claim 1, characterized in that: The upper connector (1) is provided with a mating shaft (101) and a plurality of pressing grooves (104), and the lower connector (2) is provided with a mating hole (201). The mating shaft (101) extends into the mating hole (201) and the mating shaft (101) is slidably connected to the mating hole (201).

3. The quick-change device for tunneling machine drill bits according to claim 2, characterized in that: The mating shaft (101) is provided with a tapered end (102) and a limiting groove (103). The mating hole (201) is provided with a square protrusion (202) and multiple stepped through holes (203). The limiting groove (103) and the square protrusion (202) are slidably connected.

4. The quick-change device for tunneling machine drill bits according to claim 3, characterized in that: Each step through hole (203) is equipped with a limit assembly (5), which includes a limit rod (501) and a limit spring (502) sleeved on the limit rod (501); The limiting rod (501) is slidably connected to the stepped through hole (203). One end of the limiting rod (501) is provided with a tapered head (50101), which abuts against the mating shaft (101). The other end of the limiting rod (501) is provided with an arc-shaped end (50102), which extends out of the lower connecting piece (2). One end of the limiting spring (502) is fixedly connected to the tapered head (50101), and the other end of the limiting spring (502) is fixedly connected to the stepped through hole (203). The arc-shaped end (50102) of the limiting rod (501) is provided with a limiting hole (50103).

5. The quick-change device for tunneling machine drill bits according to claim 4, characterized in that: The quick clamp (4) includes a clamping rod (401) and a clamp handle (402). The clamping rod (401) abuts against the bottom surface of the clamping groove (104). The lower end of the clamp handle (402) is provided with a square through groove (403) and a positioning pin mounting hole (404). The positioning pin mounting hole (404) is aligned with the limiting hole (50103).

6. The quick-change device for tunneling machine drill bits according to claim 5, characterized in that: A spring positioning pin (6) is installed in the positioning pin mounting hole (404), and the lower end of the spring positioning pin (6) extends into the limiting hole (50103).

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