Quick-change tunneling machine cutting head assembly

Abstract

The utility model belongs to the field of cutting head assembly, concretely relates to quick change type heading machine cutting head assembly, including cutting head, the outer ring wall welding of cutting head has tooth holder, and tooth holder and cutting head are tangentially arranged, the inside slide coupling of tooth holder has a pick, the fixed connection of pick has a lock pin, the end of tooth holder slide coupling has a convex block, the fixed connection of the tail end of convex block has an arc lock piece, the arc lock piece and lock pin slide coupling, the outer ring wall fixed connection of arc lock piece has fixed piece. The utility model discloses through setting up the multiple through spring elastic expansion's snap pin in the radial inside of pick, then sets up corresponding snap groove and ring groove in tooth holder again, like this, can install through the mode of inserting and pulling pick, and the quick replacement of single pick in later period is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cutting head assembly, concretely to quick replacement type heading machine cutting head assembly. BACKGROUND

[0002] The heading machine is the key core equipment for breaking rock and excavating roadway in coal mine, tunnel and other underground engineering. The cutting head completes the heading operation by high-speed rotation and directly impacting and grinding the rock wall through a large number of cutting teeth installed thereon. As the cutting tooth is a consumable part directly involved in breaking, it bears extremely high impact load, abrasive wear and alternating stress in harsh working conditions, and is prone to wear, alloy head falling off or fracture failure, so it needs to be frequently replaced.

[0003] Through retrieval, in the utility model patent with patent grant announcement No. CN219081585U, a kind of heading machine cutting head assembly is disclosed, including tooth holder, the upper portion of tooth holder is provided with through hole, cutting tooth is arranged through through hole, tooth holder one end is fixedly provided with stop block, recess is opened in the upper portion of stop block, internal thread is arranged on the inner wall of recess, screw rod is fixedly arranged at the middle position of the end of cutting tooth close to stop block, and the one end of screw rod is arranged in recess and is tightly screwed together with stop block.

[0004] At present, the vast majority of cutting teeth of heading machine adopt traditional "elastic retaining ring" or "U-shaped clamp spring" type fixing method. Specifically, a ring groove is processed at the tail of cutting tooth, and when it is inserted into tooth holder, an elastic clamp spring is embedded into the corresponding clamp groove in tooth holder and clamped into the ring groove of cutting tooth, and the elastic tension of clamp spring is used to prevent cutting tooth from falling off. When disassembling, special tools such as clamp spring pliers are needed to pry out the clamp spring on the space-limited cutting head, which is extremely inconvenient to operate. After being subjected to strong vibration and impact, the clamp spring is prone to fatigue, deformation or even collapse, which leads to loosening and falling off of cutting tooth, and it is not stable enough. Therefore, it needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing quick replacement type heading machine cutting head assembly, which solves the problems of inconvenient replacement and unstable installation of the cutting teeth of existing cutting head.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: quick replacement type heading machine cutting head assembly, including cutting head, the outer circle wall of cutting head is welded with tooth holder, and tooth holder and cutting head are tangentially arranged, the inside of tooth holder is slidably connected with cutting tooth, the cutting tooth is fixedly connected with locking pin, the end of tooth holder is slidably connected with convex block, the end of convex block is fixedly connected with circular arc lock piece, the circular arc lock piece is slidably connected with locking pin, the outer circle wall of circular arc lock piece is fixedly connected with fixed piece, the inside of fixed piece is slidably connected with fastening bolt, and the end of fastening bolt is connected with locking pin through thread.

[0007] Preferably, a positioning block is fixedly connected to one end of the cutting tooth located inside the tooth holder, and the positioning block engages with the tooth holder. The positioning block serves to position the cutting tooth within the tooth holder.

[0008] Preferably, the cutting tooth has multiple locking pins slidably connected internally, which engage with the tooth base. A spring is also provided inside the cutting tooth; one end of the spring is fixedly connected to a locking pin, and the other end is fixedly connected to the inner surface of the cutting tooth. The spring and locking pins form a spring-and-clamp structure, facilitating the disassembly and replacement of the cutting tooth.

[0009] Preferably, the inner wall of the toothed seat has an annular groove, and the arcuate end of the locking pin is located within the annular groove. The annular groove provides a locking position for the locking pin within the toothed seat.

[0010] Preferably, a slide rail is provided at the end of the toothed seat, and the convex letter slider is located within the slide rail. The cross-section of the slide rail is the same as the cross-section of the convex letter slider, which facilitates the sliding of the convex letter slider at the end of the toothed seat without causing it to fall off.

[0011] Preferably, the arc-shaped locking plate has a notch, and the locking pin is located within the notch. The notch allows the arc-shaped locking plate to enclose the locking pin after rotating via the convex slider.

[0012] Preferably, the fastening bolt penetrates the fixing plate, and the protruding part of the fastening bolt abuts against the fixing plate. By configuring the fastening bolt, it cooperates with the locking pin to lock the cutting teeth after installation, improving the stability after installation.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model provides multiple locking pins that are elastically extended and retracted by springs inside the radial direction of the cutting tooth, and then sets corresponding locking grooves and ring grooves in the tooth base. In this way, the cutting tooth can be installed by inserting and removing it, which facilitates the quick replacement of individual cutting teeth in the later stage.

[0015] 2. This utility model sets a locking pin on the cutting tooth, and then sets an arc locking piece at the end of the tooth seat, which is rotated by the cooperation of the convex slider and the slide rail. The arc locking piece wraps around the locking pin and is pressed by high-strength fastening bolts, forming a vibration-resistant locking force, which further improves the stability of the cutting tooth after installation. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Top sectional view;

[0018] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0019] Figure 4 This utility model Figure 1 A schematic diagram of the cutting tooth structure;

[0020] Figure 5 This utility model Figure 1 A schematic diagram of the arc-shaped locking plate structure;

[0021] Figure 6 This utility model Figure 1 A cross-sectional schematic diagram of the tooth seat structure.

[0022] In the diagram: 1. Cutting head; 2. Tooth seat; 3. Cutting tooth; 4. Positioning block; 5. Locking pin; 6. Spring; 7. Locking pin; 8. Raised slider; 9. Arc locking plate; 91. Notch; 10. Fixing plate; 11. Fastening bolt; 201. Circular groove; 202. Slide rail. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 A quick-change tunneling machine cutting head assembly includes a cutting head 1. A toothed seat 2 is welded to the outer wall of the cutting head 1, and the toothed seat 2 is tangentially positioned to the cutting head 1. A cutting tooth 3 is slidably connected inside the toothed seat 2. A positioning block 4 is fixedly connected to one end of the cutting tooth 3 inside the toothed seat 2, and the positioning block 4 engages with the toothed seat 2. The positioning block 4 positions the cutting tooth 3 within the toothed seat 2. Multiple locking pins 5 are slidably connected inside the cutting tooth 3, engaging with the toothed seat 2. A spring 6 is installed inside the cutting tooth 3, with one end fixedly connected to the locking pin 5 and the other end fixedly connected to the inner surface of the cutting tooth 3. The spring 6 and locking pins 5 form a spring-and-pin structure, facilitating the disassembly and replacement of the cutting tooth 3. An annular groove 201 is formed on the inner wall of the toothed seat 2, and the arc-shaped end of the locking pin 5 is located within the annular groove 201. The annular groove 201 provides an engaging position for the locking pin 5 within the toothed seat 2.

[0025] Please seeFigure 2 , Figure 3 , Figure 4 , Figure 5 A locking pin 7 is fixedly connected to the cutting tooth 3. A convex slider 8 is slidably connected to the end of the tooth base 2. A slide rail 202 is provided at the end of the tooth base 2, and the convex slider 8 is located in the slide rail 202. The cross-section of the slide rail 202 is the same as the cross-section of the convex slider 8, which facilitates the sliding of the convex slider 8 at the end of the tooth base 2 without it falling off. An arc-shaped locking piece 9 is fixedly connected to the end of the convex slider 8. The arc-shaped locking piece 9 is slidably connected to the locking pin 7. A notch 91 is provided on the arc-shaped locking piece 9, and the locking pin 7 is located in the notch 91. Through the notch 91, the arc-shaped locking piece 9 can wrap around the locking pin 7 after the convex slider 8 rotates. A fixing piece 10 is fixedly connected to the outer ring wall of the arc-shaped locking piece 9. A fastening bolt 11 is slidably connected inside the fixing piece 10. The end of the fastening bolt 11 is threadedly connected to the locking pin 7. The fastening bolt 11 is set through the fixing piece 10, and the boss of the fastening bolt 11 abuts against the fixing piece 10. By setting the fastening bolt 11, which cooperates with the locking pin 7, it has a locking effect on the cutting tooth 3 after installation, thus improving the stability after installation.

[0026] The specific implementation process of this utility model is as follows: First, align the tail of the new cutting tooth 3 with the entrance of the tooth seat 2, and at the same time align the positioning block 4 on the cutting tooth 3 with the corresponding slot inside the tooth seat 2. Then, push the cutting tooth 3 into the tooth seat 2 by hand. When the cutting tooth 3 is pushed to the predetermined depth, the locking pin 5 inside it will automatically pop out under the elastic force of the spring 6 and lock into the annular groove 201 on the inner wall of the tooth seat 2. Then rotate the arc locking plate 9. The arc locking plate 9 slides in the slide 202 through the convex slider 8 until the notch 91 on it tightly wraps the locking pin 7 on the cutting tooth 3. The fastening bolt 11 passes through the hole on the fixing plate 10 and screws into the threaded hole at the top of the locking pin 7. In this way, the installation and locking of a single cutting tooth 3 is completed. Similarly, the above steps can be reversed to complete the replacement of the cutting tooth 3. It is simple and convenient.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change tunneling machine cutting head assembly, comprising a cutting head (1), characterized in that: The outer ring wall of the cutting head (1) is welded with a tooth seat (2), and the tooth seat (2) and the cutting head (1) are tangentially connected. The tooth seat (2) is slidably connected with a cutting tooth (3), and a locking pin (7) is fixedly connected to the cutting tooth (3). The end of the tooth seat (2) is slidably connected with a convex slider (8), and the end of the convex slider (8) is fixedly connected with an arc locking piece (9). The arc locking piece (9) is slidably connected to the locking pin (7). The outer ring wall of the arc locking piece (9) is fixedly connected with a fixing piece (10), and a fastening bolt (11) is slidably connected to the inside of the fixing piece (10). The end of the fastening bolt (11) is connected to the locking pin (7) by a thread.

2. The quick-change tunneling machine cutting head assembly according to claim 1, characterized in that: The cutting tooth (3) is fixedly connected to a positioning block (4) at one end inside the tooth base (2), and the positioning block (4) is engaged with the tooth base (2).

3. The quick-change tunneling machine cutting head assembly according to claim 1, characterized in that: The cutting tooth (3) has multiple locking pins (5) slidably connected inside. The locking pins (5) are engaged with the tooth seat (2). The cutting tooth (3) has a spring (6) inside. One end of the spring (6) is fixedly connected to the locking pin (5), and the other end of the spring (6) is fixedly connected to the inner surface of the cutting tooth (3).

4. The quick-change tunneling machine cutting head assembly according to claim 3, characterized in that: The inner wall of the tooth seat (2) is provided with an annular groove (201), and the arc end of the locking pin (5) is located in the annular groove (201).

5. The quick-change tunneling machine cutting head assembly according to claim 1, characterized in that: The tooth seat (2) has a slide (202) at its end, and the convex slider (8) is located in the slide (202).

6. The quick-change tunneling machine cutting head assembly according to claim 1, characterized in that: The arc-shaped locking plate (9) has a notch (91) and the locking pin (7) is located inside the notch (91).

7. The quick-change tunneling machine cutting head assembly according to claim 1, characterized in that: The fastening bolt (11) is provided through the fixing plate (10), and the boss of the fastening bolt (11) abuts against the fixing plate (10).

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