Novel tooth holder with stable performance

Abstract

The utility model discloses a novel tooth holder with stable performance, and relates to the technical field of engineering machinery cutting equipment, the novel tooth holder comprises a tooth holder cylinder, a cutting tooth mounting cavity formed in the tooth holder cylinder and a base body connecting piece used for being connected with an equipment base body, the cutting tooth mounting cavity is a stepped through hole, and the cutting tooth mounting cavity is a cylindrical through hole. The cutting pick has the advantages that through the design of the stepped cutting pick mounting cavity and the cooperation of the cobalt-based tungsten carbide wear-resistant alloy layer on the inner wall, the locking stability and the wear resistance of the mounted cutting pick can be effectively improved. The diameter of the locking section is smaller than that of the guide section, the cutting pick can be limited and clamped, loosening of the cutting pick due to vibration during working is avoided, the abrasion-resistant alloy layer can resist friction loss of the cutting pick during frequent operation, the service life of the pick holder is prolonged, meanwhile, the clamping spring expansion groove in the bottom end of the inner wall of the pick holder cylinder further enhances the fixing strength of the cutting pick, and the service life of the cutting pick is prolonged. Equipment faults caused by loosening of the cutting pick are reduced, and the cutting pick is suitable for long-term stable operation under a high-load working condition.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery cutting equipment technology, specifically a new type of gear seat with stable performance. Background Technology

[0002] In the fields of mining, tunnel excavation, and construction machinery, the gear holder serves as the mounting carrier for the cutting teeth, and its performance directly affects the operating efficiency and service life of the equipment. When cutting hard materials such as rocks and ores, the gear holder must withstand severe impact loads, frictional wear, and alternating stresses, thus placing extremely high demands on its structural strength, wear resistance, and stability.

[0003] Existing tooth holders generally have some problems. First, the locking stability of the cutting tooth mounting structure in the existing technology is insufficient, and the wear-resistant layer is easily worn, resulting in loosening of the cutting tooth and short life of the tooth holder. Second, the existing tooth holder and substrate connection structure has weak impact resistance, and stress concentration is prone to cracking, making it difficult to adapt to complex working conditions. Therefore, we propose a new type of tooth holder with stable performance. Utility Model Content

[0004] The purpose of this invention is to provide a new type of tooth holder with stable performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel tooth holder with stable performance, comprising a tooth holder cylinder, a cutting tooth mounting cavity opened within the tooth holder cylinder, and a base connector for connecting the equipment base. The cutting tooth mounting cavity is a stepped through hole, and includes a guide section near the top of the tooth holder and a locking section at the bottom. The diameter of the locking section is smaller than that of the guide section, and the inner wall of the locking section is covered with a wear-resistant alloy layer. A snap-fit ​​reinforcing rib and a connecting steel block are connected between the tooth holder cylinder and the base connector.

[0006] As a further embodiment of this utility model: a locking hole A is provided on the outer surface of the toothed cylinder near the base connector, and a locking hole B of the same height as the locking hole A is provided on the surface of the base connector near the toothed cylinder. The locking holes A and B are welded at the edge position and connected to the outer surface of the locking reinforcing rib block.

[0007] As a further embodiment of this utility model: the bottom end of the inner wall of the tooth holder cylinder is provided with a retaining spring expansion groove for fastening the cutting teeth.

[0008] As a further embodiment of this utility model: the top surface and the ground surface of the tooth base cylinder are both provided with grooves to disperse stress, the grooves are arc-shaped grooves, and the bottom surface of the grooves forms an angle of 45°±15° with the axis of the cutting tooth mounting cavity.

[0009] As a further embodiment of this utility model: the wear-resistant alloy layer has a thickness of 2.5mm–3.5mm, and the wear-resistant alloy layer is bonded to the inner wall of the cutting tooth mounting cavity by high-frequency induction cladding, wherein the wear-resistant alloy layer is a cobalt-based tungsten carbide composite material.

[0010] As a further embodiment of this utility model: the surface of the snap-fit ​​reinforcing rib block is provided with a protrusion, the protrusion is adapted to the snap-fit ​​connection of the snap-fit ​​hole A and the snap-fit ​​hole B, the snap-fit ​​reinforcing rib block is welded to the tooth base cylinder and the base body connecting piece, and the tooth base cylinder is welded to the base body connecting piece.

[0011] As a further embodiment of this utility model: the upper and lower sides of the connecting steel block are welded to the snap-fit ​​reinforcing rib block, and the outer surface of the connecting steel block is welded to the toothed seat cylinder and the base connecting parts.

[0012] As a further embodiment of this utility model: the height of the snap-fit ​​reinforcing rib is 1 / 6–1 / 5 of the height of the toothed cylinder, and the thickness of the snap-fit ​​reinforcing rib is 5mm–8mm.

[0013] Compared with the prior art, the beneficial effects of this utility model by adopting the above technical solution are as follows:

[0014] 1. This utility model, through the design of a stepped cutting tooth mounting cavity, combined with a cobalt-based tungsten carbide wear-resistant alloy layer on the inner wall, can effectively improve the locking stability and wear resistance of the cutting tooth after installation. The diameter of the locking section is smaller than that of the guide section, which can form a limiting and clamping effect on the cutting tooth, preventing the cutting tooth from loosening due to vibration during operation. The wear-resistant alloy layer can resist the frictional wear of the cutting tooth during frequent operation, extending the service life of the tooth holder. At the same time, the retaining spring expansion groove at the bottom of the inner wall of the tooth holder further enhances the fixing strength of the cutting tooth, reducing equipment failure caused by the loosening of the cutting tooth, and is suitable for long-term stable operation under high load conditions;

[0015] 2. This utility model forms a high-strength mechanical support system by connecting the tooth base cylinder and the base body through snap-fit ​​reinforcing ribs, connecting steel blocks, and multiple welded structures. The height of the snap-fit ​​reinforcing ribs is a specific ratio to the height of the tooth base cylinder. Combined with the triangular support structure of the connecting steel blocks, the impact load during equipment operation can be evenly distributed. The arc-shaped grooves on the top and bottom surfaces of the tooth base cylinder can effectively release stress concentration and prevent the tooth base from cracking due to alternating stress. This structural design enables the tooth base to maintain structural integrity under complex working conditions, improving the overall reliability and durability of the equipment.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the novel tooth holder in an embodiment of this utility model;

[0018] Figure 2 This is a front view of the novel tooth holder in an embodiment of this utility model;

[0019] Figure 3 This is a partial three-dimensional schematic diagram of the novel tooth holder in an embodiment of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the novel tooth holder in an embodiment of this utility model;

[0021] Figure 5 This is a three-dimensional schematic diagram of the bottom of the novel tooth holder in an embodiment of this utility model;

[0022] Figure 6 This is a partial three-dimensional schematic diagram of the snap-fit ​​reinforcing rib block and the connecting steel block in an embodiment of this utility model.

[0023] In the figure: 1. New type of tooth seat; 2. Tooth seat cylinder; 21. Guide section; 22. Locking section; 23. Snap hole A; 24. Snap spring expansion groove; 25. Groove; 3. Cutting tooth mounting cavity; 4. Base connecting piece; 41. Snap-fit ​​reinforcing rib block; 42. Connecting steel block; 43. Snap hole B. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0025] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Please see the appendix Figure 1 - Appendix Figure 6 This utility model discloses a novel tooth holder with stable performance, comprising a novel tooth holder 1. The novel tooth holder 1 includes a tooth holder cylinder 2, a cutting tooth mounting cavity 3 opened in the tooth holder cylinder 2, and a base connecting member 4 for connecting the equipment base. The cutting tooth mounting cavity 3 is a stepped through hole. The cutting tooth mounting cavity 3 includes a guide section 21 near the top of the tooth holder and a locking section 22 at the bottom. The diameter of the locking section 22 is smaller than that of the guide section 21, and the inner wall of the locking section 22 is covered with a wear-resistant alloy layer. A snap-fit ​​reinforcing rib block 41 and a connecting steel block 42 are connected between the tooth holder cylinder 2 and the base connecting member 4.

[0027] In Embodiment 1, a locking hole A23 is provided on the outer surface of the tooth base cylinder 2 near the base connector 4. A locking hole B43 of the same height as the locking hole A23 is provided on the surface of the base connector 4 near the tooth base cylinder 2. The locking holes A23 and B43 are welded at the edge and connected to the outer surface of the locking reinforcing rib 41. A spring tensioning groove 24 for fastening the cutting tooth is provided at the bottom end of the inner wall of the tooth base cylinder 2. The top surface and the ground surface of the tooth base cylinder 2 are provided with stress-dispersing grooves 25. The grooves 25 are arc-shaped grooves. The bottom surface of the grooves 25 forms an angle of 45°±15° with the axis of the cutting tooth mounting cavity 3.

[0028] The surface of the substrate connector 4 is provided with a laser-clad wear-resistant coating, the coating composition of which is FeCrB alloy powder or WC-Co metal ceramic;

[0029] Specifically, the overall structural design:

[0030] The tooth holder 1 has a tooth holder cylinder 2 forged from 42CrMo alloy structural steel, with a diameter of 50mm and a height of 120mm. The cutting tooth mounting cavity 3 is a stepped through hole. The guide section 21 has a diameter of 32mm and a depth of 40mm, and the bottom locking section 22 has a diameter of 28mm and a depth of 30mm. The two are connected by a 1mm transition fillet. The inner wall of the locking section 22 is coated with a 3mm thick cobalt-based tungsten carbide composite wear-resistant alloy layer through high-frequency induction cladding. The hardness of the cladding layer reaches HRC65-70, and the bonding strength with the substrate is ≥400MPa.

[0031] In Example 2, the wear-resistant alloy layer has a thickness of 2.5mm–3.5mm, and the wear-resistant alloy layer is bonded to the inner wall of the cutting tooth mounting cavity 3 by high-frequency induction cladding. The wear-resistant alloy layer is a cobalt-based tungsten carbide composite material. The surface of the snap-fit ​​reinforcing rib block 41 is provided with protrusions, and the protrusions are matched and connected to the snap-fit ​​holes A23 and B43. The snap-fit ​​reinforcing rib block 41 is welded to the tooth base cylinder 2 and the base connecting piece 4. The tooth base cylinder 2 is welded to the base connecting piece 4. The upper and lower sides of the connecting steel block 42 are welded to the snap-fit ​​reinforcing rib block 41. The outer surface of the connecting steel block 42 is welded to the tooth base cylinder 2 and the base connecting piece 4. The height of the snap-fit ​​reinforcing rib block 41 is 1 / 6–1 / 5 of the height of the tooth base cylinder 2, and the thickness of the snap-fit ​​reinforcing rib block 41 is 5mm–8mm.

[0032] Specifically,

[0033] Cutting tooth fixing structure:

[0034] The bottom of the inner wall of the tooth holder 2 is provided with a retaining spring expansion groove 24 with a depth of 3mm and a width of 2mm. During assembly, the retaining spring is embedded in the groove to compress the tail of the cutting tooth. The diameter difference of the stepped hole is used to achieve double locking. The top and bottom surfaces of the tooth holder 2 are each provided with 3 arc-shaped grooves 25. The grooves 25 have a radius of 5mm, and the bottom surface is at a 45° angle with the axis of the cutting tooth mounting cavity 3. The grooves are 2mm deep and are used to disperse the radial stress during cutting tooth operation.

[0035] Matrix connection structure:

[0036] The base connector 4 is made of Q345B steel plate with a thickness of 20mm. It has a locking hole A23 and a locking hole B43 with a diameter of 10mm at the connection with the toothed cylinder 2. The center of the hole is 15mm away from the bottom surface of the toothed cylinder 2. The locking reinforcing rib block 41 is made of 40Cr steel with a height of 20mm, which is 1 / 6 of the height of the toothed cylinder 2 and a thickness of 6mm. After the protrusion on its surface is embedded in the locking hole A23 and the locking hole B43, a 5mm high weld is welded along the edge of the hole. The connecting steel block 42 is a 10mm thick triangular steel plate. The two right-angled sides are welded to the toothed cylinder 2 and the base connector 4 respectively, and the hypotenuse is welded to the locking reinforcing rib block 41 to form a triangular support structure.

[0037] Working principle:

[0038] The new tooth holder 1 achieves precise positioning and double locking of the cutting tooth through the stepped cutting tooth mounting cavity 3 and the retaining spring expansion groove 24. When the cutting tooth is inserted, it is first quickly guided in through the guide section 21 with a larger diameter until the shoulder of the cutting tooth abuts against the stepped surface of the guide section 21 and the locking section 22. Since the diameter of the locking section 22 is smaller than that of the guide section 21, its inner wall forms a radial limit on the cutting tooth to prevent axial movement of the cutting tooth. At the same time, the cobalt-based tungsten carbide wear-resistant alloy layer with a thickness of 2.5–3.5 mm on the inner wall of the locking section 22 is combined with the substrate through high-frequency induction cladding to form a rigid support surface, reducing direct friction between the cutting tooth and the tooth holder. When the cutting tooth is in place, the retaining spring is embedded in the retaining spring expansion groove 24 at the bottom of the inner wall of the tooth holder cylinder 2. Through elastic deformation, it squeezes the tail of the cutting tooth to generate an axial locking force. The difference in the diameter of the stepped hole and the double action of the retaining spring make the cutting tooth form a composite fixing structure of "mechanical limit + elastic clamping" after installation, which effectively resists vibration and impact loads during operation and prevents the cutting tooth from loosening.

[0039] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 limiting the scope of protection of this utility model.

[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0042] For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.

Claims

1. A novel gear seat with stable performance, comprising a novel gear seat (1), characterized in that: The novel tooth holder (1) includes a tooth holder cylinder (2), a cutting tooth mounting cavity (3) opened in the tooth holder cylinder (2), and a base connector (4) for connecting the equipment base. The cutting tooth mounting cavity (3) is a stepped through hole. The cutting tooth mounting cavity (3) includes a guide section (21) near the top of the tooth holder and a locking section (22) at the bottom. The diameter of the locking section (22) is smaller than that of the guide section (21), and the inner wall of the locking section (22) is covered with a wear-resistant alloy layer. A snap-fit ​​reinforcing rib block (41) and a connecting steel block (42) are connected between the tooth holder cylinder (2) and the base connector (4).

2. The novel gear seat with stable performance according to claim 1, characterized in that: The toothed cylinder (2) has a locking hole A (23) on its outer surface near the base connector (4). The base connector (4) has a locking hole B (43) at the same height as the locking hole A (23) on its surface near the toothed cylinder (2). The locking holes A (23) and B (43) are welded at the edge and connected to the outer surface of the locking reinforcing rib (41).

3. The novel gear seat with stable performance according to claim 1, characterized in that: The bottom of the inner wall of the tooth holder (2) is provided with a retaining spring expansion groove (24) for fastening the cutting teeth.

4. A novel gear seat with stable performance according to claim 1, characterized in that: The tooth base cylinder (2) has a stress-dispersing groove (25) on its top surface and ground surface. The groove (25) is an arc-shaped groove, and the bottom surface of the groove (25) forms an angle of 45°±15° with the axis of the cutting tooth mounting cavity (3).

5. A novel gear seat with stable performance according to claim 1, characterized in that: The wear-resistant alloy layer has a thickness of 2.5mm–3.5mm, and the wear-resistant alloy layer is bonded to the inner wall of the cutting tooth mounting cavity (3) by high-frequency induction cladding. The wear-resistant alloy layer is a cobalt-based tungsten carbide composite material.

6. A novel gear seat with stable performance according to claim 1, characterized in that: The surface of the snap-fit ​​reinforcing rib block (41) is provided with a protrusion. The protrusion is connected to the snap-fit ​​hole A (23) and the snap-fit ​​hole B (43). The snap-fit ​​reinforcing rib block (41) is welded to the tooth seat cylinder (2) and the base connecting piece (4). The tooth seat cylinder (2) is welded to the base connecting piece (4).

7. A novel gear seat with stable performance according to claim 1, characterized in that: The upper and lower sides of the connecting steel block (42) are welded to the snap-fit ​​reinforcing rib block (41), and the outer surface of the connecting steel block (42) is welded to the toothed seat cylinder (2) and the base connecting piece (4).

8. A novel gear seat with stable performance according to claim 1, characterized in that: The height of the snap-fit ​​reinforcing rib (41) is 1 / 6–1 / 5 of the height of the toothed cylinder (2), and the thickness of the snap-fit ​​reinforcing rib (41) is 5mm–8mm.

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