A pick structure capable of pre-cutting
By designing a pre-breaking groove on the side wall of the tooth shank, the cutting teeth break at the pre-breaking groove when under stress, solving the problem of burr edge compression at the fracture after the cutting teeth breaks, achieving convenient dismantling and cost savings for the cutting teeth.
Patent Information
- Application Number
- CN202420841762.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing teeth are prone to break when cutting hard objects, and the burrs at the fracture are squeezed into the tooth sleeve and the hole wall of the tooth seat, resulting in difficulty in removing the tooth handle and increasing the replacement cost.
A pre-breakable tooth cutting structure is designed, and the side wall of the tooth cutting handle is equipped with an inwardly recessed pre-breaking groove, which breaks at the pre-breaking groove rather than at the tooth cutting root, thereby avoiding burr compression and simplifying the breaking and removal process.
The tooth cut is easy to break and remove, reducing replacement costs, and avoiding the difficulty of removal caused by burrs at the fracture.
Smart Images
Figure CN222701967U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pick, in particular to a pick structure capable of being pre-cut. Background Art
[0002] The pick is a tool used in the cutting system for cutting coal, gangue and rock. The tooth sleeve is an accessory that assists in installing the pick and protects the tooth seat. The tooth seat is the carrier for installing the cutting system. The pick is a consumable and can be directly replaced when it fails. The replacement method is simple.
[0003] In the prior art, during the cutting process, when the existing picks are cutting harder gangue, rock, or cutting into equipment, supporting devices, etc., the picks will break and fail. Due to the characteristics of the pick structure, the position where the pick breaks is the root of the pick shank at the head of the pick. Under the action of a large external force, the root of the shank is first bent and deformed, and accompanied by necking, until the pick is broken. After the pick is broken, the root of the pick is deformed due to bending, and part of the burrs at the fracture will be squeezed into the wall of the tooth sleeve and the tooth seat hole, making it very difficult to remove the pick shank. Under the condition that fire can be started, it can be cut off; under the condition that fire cannot be started, the tooth sleeve can only be scrapped and replaced together, increasing unnecessary cost investment, or the tooth seat is not installed with the pick, which can easily cause the subsequent pick to break frequently and accelerate the abnormal wear of the tooth seat, which is costly and inconvenient to break and remove. Now there is an urgent need for a pre-breakable pick structure to solve the above-mentioned problems. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a pick structure that can be pre-cut to solve the problems raised in the above-mentioned background technology. The present invention has a reasonable structure, is easy to break and remove, and has low cost.
[0005] In order to achieve the above object, the utility model is implemented through the following technical solutions: a pick structure capable of pre-cutting, comprising:
[0006] A pick head and a pick shank arranged at the end of the pick head, a side wall of the pick shank is provided with an inwardly recessed pre-breaking groove, and a pick root is arranged on the side of the pick shank away from the pick head.
[0007] Furthermore, the pre-breaking groove is an annular semicircular groove.
[0008] Furthermore, the diameter of the pick head on one side close to the pick shank is larger than the diameter of the pick shank, and the diameter of the pick shank is larger than the diameter of the pick root.
[0009] Furthermore, a chamfer is provided at the connection between the pick shank and the pick head.
[0010] Furthermore, a cemented carbide head is brazed on one end of the pick head away from the pick shank.
[0011] Furthermore, the surface of the cemented carbide head is provided with wear-resistant material.
[0012] According to a pre-breakable pick structure of the utility model, the pick shank and the pick root are installed inside the tooth sleeve, and the pick head is exposed outside the tooth sleeve. When the pick is subjected to a larger external force of the same level, it breaks at the pre-breaking groove of the pick shank instead of the pick root, thereby preventing the burrs at the fracture from squeezing into the tooth sleeve and the tooth seat hole wall, affecting the removal of the pick shank, and facilitating the breaking and removal. At the same time, it is prevented that the pick root is deformed due to pulling and bending, and part of the burrs at the fracture will be squeezed into the tooth sleeve and the tooth seat hole wall, making the removal of the pick shank very difficult. Under the condition that fire cannot be started, the tooth sleeve can only be scrapped and replaced together, resulting in increased costs, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:
[0014] Figure 1 It is a structural schematic diagram of a pick structure capable of pre-cutting according to an embodiment of the utility model;
[0015] Figure 2 It is a structural schematic diagram of a pick structure capable of pre-cutting installed inside a tooth seat according to an embodiment of the utility model;
[0016] Figure 3 A front view of a pick structure capable of pre-cutting according to an embodiment of the utility model installed inside a tooth seat;
[0017] In the figure: 1, pick head; 101, carbide head; 2, pre-cutting groove; 3, pick shank; 31, pick root; 4, chamfered corner; 5, tooth sleeve; 6, tooth seat. DETAILED DESCRIPTION
[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0019] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a technical solution: a pick structure capable of pre-cutting, comprising:
[0020] A pick head 1 and a pick shank 3 arranged at the end of the pick head 1, a side wall of the pick shank 3 is provided with a pre-breaking groove 2 recessed inwardly, a pick root 31 is arranged on the side of the pick shank 3 away from the pick head 1, the pick is arranged inside the tooth sleeve 5, and the tooth sleeve 5 is arranged inside the tooth seat 6. This design is such that the pick shank 3 and the pick root 31 are installed inside the tooth sleeve 5, and the pick head 1 is exposed outside the tooth sleeve 5. When the pick is subjected to a larger external force of the same level, it breaks at the pre-breaking groove 2 of the pick shank 3 instead of the pick root 31, thereby preventing the burrs at the fracture from being squeezed into the hole walls of the tooth sleeve 5 and the tooth seat 6, affecting the pick. The removal of the shank 3 facilitates breaking and taking out. At the same time, the position and depth of the pre-breaking groove 2 are determined through force analysis and calculation. According to different types of picks, different performance requirements, product quality of different manufacturing processes, etc., matching pre-breaking grooves 2 are designed to ensure the normal application of the picks under various conditions of use. At the same time, it is avoided that the root 31 of the pick is deformed due to bending, and part of the burrs at the fracture will be squeezed into the hole walls of the tooth sleeve 5 and the tooth seat 6, which makes it very difficult to remove the pick shank 3. Under the condition that fire cannot be started, the tooth sleeve 5 can only be scrapped and replaced together, which increases the cost, thereby saving costs.
[0021] Reference Figure 1 and Figure 2 The pre-breaking groove 2 is an annular semicircular groove. This design facilitates the cutting tooth to break in the pre-breaking groove 2. The diameter of the cutting tooth head 1 close to the cutting tooth shank 3 is larger than the diameter of the cutting tooth shank 3. The diameter of the cutting tooth shank 3 is larger than the diameter of the cutting tooth root 31, which improves the rationality of the design.
[0022] Reference Figure 1 A chamfer 4 is provided at the connection between the pick shank 3 and the pick head 1. This design reduces stress concentration, increases the root cross-sectional area of the pick head 1, improves the shear strength, and reduces the risk of shear fracture of the pick by using the chamfer 4.
[0023] Reference Figure 2 A cemented carbide head 101 is brazed on one end of the pick head 1 away from the pick shank 3, and a wear-resistant material is provided on the surface of the cemented carbide head 101, which improves the rationality of the design.
[0024] Reference Figure 1-Figure 3As an embodiment of the present utility model: the staff installs the pick shank 3 and the pick root 31 inside the tooth sleeve 5, and the pick head 1 is exposed outside the tooth sleeve 5. When the pick is subjected to a larger external force of the same level, it breaks at the pre-breaking groove 2 of the pick shank 3 instead of the pick root 31, thereby avoiding the burrs at the fracture being squeezed into the hole walls of the tooth sleeve 5 and the tooth seat 6, affecting the removal of the pick shank 3, and facilitating the breaking and removal. At the same time, the position and groove depth of the pre-breaking groove 2 are determined by force analysis and calculation. According to different types of picks, different performance requirements, product quality of different manufacturing processes, etc., matching pre-breaking grooves 2 are designed to ensure the normal application of the pick under various use conditions. At the same time, due to the deformation of the pick root 31 due to bending, part of the burrs at the fracture will be squeezed into the hole walls of the tooth sleeve 5 and the tooth seat 6, resulting in the pick shank 3. It is very difficult to remove. Under the condition that fire cannot be started, the tooth sleeve 5 can only be scrapped and replaced together, resulting in an increase in cost, thereby saving costs and improving the practicality of the present utility model.
[0025] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A pick structure capable of pre-cutting, characterized in that: include: A pick head (1) and a pick shank (3) arranged at the end of the pick head (1), the side wall of the pick shank (3) is provided with an inwardly recessed pre-breaking groove (2), and a pick root (31) is arranged on the side of the pick shank (3) away from the pick head (1).
2. A pre-cutting pick structure according to claim 1, characterized in that: The pre-breaking groove (2) is an annular semicircular groove.
3. A pre-cutting pick structure according to claim 1, characterized in that: The diameter of the pick head (1) on the side close to the pick shank (3) is larger than the diameter of the pick shank (3), and the diameter of the pick shank (3) is larger than the diameter of the pick root (31).
4. A pre-cutting pick structure according to claim 3, characterized in that: A chamfer (4) is provided at the connection between the pick shank (3) and the pick head (1).
5. A pre-cutting pick structure according to claim 1, characterized in that: A cemented carbide head (101) is brazed to one end of the pick head (1) away from the pick shank (3).
6. A pre-cutting pick structure according to claim 5, characterized in that: The surface of the cemented carbide head (101) is provided with wear-resistant material.