Adjustable round nose knife

Abstract

The utility model discloses an adjustable round nose knife, which belongs to the technical field of knives, and comprises a round nose knife, the outer surface of the round nose knife is movably connected with a knife handle, an inner cavity of the knife handle is provided with an adjusting mechanism, one end of the knife handle is provided with a limiting mechanism, and the other end of the knife handle is provided with an adjusting mechanism. A moving rod and a spring are pulled outwards to drive a tooth block to move outwards to leave a gear, then a rotating handle is held by hand to drive the gear and a screw rod to rotate, a round nose knife is driven to vertically move outwards under the cooperation of a sliding block and a sliding groove, the using length of the round nose knife is adjusted, and the machining requirements of different depths are met by flexibly adjusting the length of the round nose knife extending out of a knife handle; therefore, the required cutting depth can be achieved, the dynamic performance and the stability of the cutter are not influenced, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, and more specifically, to an adjustable round nose cutter. Background Technique

[0002] A round nose cutter refers to a cutting tool in the field of machining, specifically a turning tool or a milling cutter with a round tip shape. The characteristic of this cutting tool is that a continuous arc surface is formed at the tip, which is suitable for finish machining and semi-finish machining, especially suitable for the machining of curved surfaces, grooves and planes, and can effectively avoid stress concentration at sharp corners, improve the surface quality of workpieces and extend the service life of cutting tools.

[0003] When the existing round nose cutter is used for milling, it is inserted into the corresponding tool holder or tool seat. Due to the characteristics of its arc shape, it can machine parts with a smooth transition R-angle feature without sharp corner cutting. When the round nose cutter rotates for cutting, the arc tip can provide better chip evacuation effect, reduce cutting problems caused by chip accumulation, and can not only complete high-efficiency cutting, but also ensure the quality requirements of workpieces.

[0004] In the actual use process of the existing technology, since the length of the round nose cutter is fixed, it can only handle cutting tasks with a specific depth during machining. When deep cavity machining or shallow contour machining is required, it cannot be flexibly adjusted to meet the requirements of different workpieces. Therefore, an adjustable round nose cutter is proposed. Content of the Utility Model

[0005] 1. Technical Problems to be Solved

[0006] Aiming at the problems existing in the prior art, the utility model provides an adjustable round nose cutter. By pulling the moving rod and the spring outwards to drive the tooth block to move outwards away from the gear, and then holding the rotating handle to drive the gear and the screw rod to rotate, the round nose cutter is driven to move vertically outwards under the cooperation of the slider and the chute, and the length of the round nose cutter used is adjusted. By flexibly adjusting the length of the round nose cutter extending out of the tool holder, the machining requirements of different depths are met, so as to ensure that the required cutting depth can be achieved without affecting the dynamic performance and stability of the cutting tool, and the practicability of the device is improved.

[0007] 2. Technical Solutions

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] An adjustable round nose cutter, comprising a round nose cutter, the outer surface of the round nose cutter is movably connected with a tool handle, an adjusting mechanism is arranged in the inner cavity of the tool handle, and a limiting mechanism is arranged at one end of the tool handle; The adjusting mechanism includes two sliders symmetrically and fixedly connected to the outer surface of the round nose cutter, a screw rod is rotatably connected in the inner cavity of the tool handle, and a gear is fixedly connected to one end of the screw rod; The limiting mechanism includes a fixing plate fixedly connected to one end of the tool handle, a moving rod is inserted through the inner cavity of the fixing plate, and a tooth block is fixedly connected to the lower end of the moving rod.

[0010] Furthermore, a sliding groove is opened in the inner cavity of the tool handle, and the slider moves in the sliding groove.

[0011] Furthermore, a thread is arranged in the inner cavity of the round nose cutter, and the inner cavity of the round nose cutter is threadedly connected with the outer surface of the screw rod.

[0012] Furthermore, a thread is arranged in the inner cavity of the round nose cutter, and the inner cavity of the round nose cutter is threadedly connected with the outer surface of the screw rod.

[0013] Furthermore, the tooth block is meshed and connected with the gear, and a spring is sleeved on the outer surface of the moving rod.

[0014] Furthermore, one end of the spring is fixedly connected with the fixing plate, and the other end of the spring is fixedly connected with the tooth block.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] (1) In this solution, by pulling the moving rod and the spring outwards to drive the tooth block to move outwards and away from the gear, then holding the rotating handle to drive the gear and the screw rod to rotate, driving the round nose cutter to move vertically outwards under the cooperation of the slider and the sliding groove, adjusting the length of the round nose cutter used, and by flexibly adjusting the length of the round nose cutter extending out of the tool handle, the processing requirements of different depths are met, so as to ensure that both the required cutting depth can be achieved and the dynamic performance and stability of the tool are not affected, improving the practicability of the device.

[0018] (2) In this solution, the elastic force of the spring itself drives the tooth block to move inwards again to be meshed and connected with the gear to limit its position, avoiding the situation that the gear rotates randomly, and improving the stability of the device during use. Description of the drawings

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the semi-sectional internal structural schematic diagram of the present utility model;

[0021] Figure 3 is the partial structural schematic diagram of the present utility model;

[0022] Figure 4 This is a schematic diagram of the partial structure of the present utility model.

[0023] Explanation of the reference numerals in the figure:

[0024] 1. Round nose cutter; 101. Tool shank; 2. Adjusting mechanism; 201. Slide groove; 202. Slide block; 203. Screw; 204. Gear; 205. Rotating handle; 3. Limiting mechanism; 301. Tooth block; 302. Fixed plate; 303. Moving rod; 304. Spring. Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] Embodiment 1

[0029] Refer to Figure 1 、 Figure 2 And Figure 3, which is the first embodiment of the present utility model. This embodiment provides an adjustable round nose cutter, including a round nose cutter 1. The outer surface of the round nose cutter 1 is movably connected to a tool holder 101. An adjusting mechanism 2 is arranged in the inner cavity of the tool holder 101, including two sliders 202 symmetrically and fixedly connected to the outer surface of the round nose cutter 1. A screw rod 203 is rotatably connected in the inner cavity of the tool holder 101. One end of the screw rod 203 is fixedly connected to a gear 204;

[0030] Specifically, a chute 201 is opened in the inner cavity of the tool holder 101. The slider 202 moves in the chute 201. A thread is arranged in the inner cavity of the round nose cutter 1. The inner cavity of the round nose cutter 1 is threaded with the outer surface of the screw rod 203. One side of the gear 204 is fixedly connected to a rotating handle 205. A rubber sleeve is fixedly connected to the outer surface of the rotating handle 205;

[0031] Furthermore, during the use of the device, the operator drives the gear 204 and the screw rod 203 to rotate by holding the rotating handle 205, and drives the round nose cutter 1 to move vertically outwards under the cooperation of the slider 202 and the chute 201, adjusting the length of the round nose cutter 1 used, and flexibly adjusting the length of the round nose cutter 1 extending out of the tool holder 101.

[0032] Embodiment 2

[0033] Refer to Figure 1 、 Figure 2 And Figure 4 , which is the second embodiment of the present utility model. Based on the previous embodiment, a limiting mechanism 3 is arranged at one end of the tool holder 101, including a fixing plate 302 fixedly connected to one end of the tool holder 101. A moving rod 303 is inserted into the inner cavity of the fixing plate 302. A tooth block 301 is fixedly connected to the lower end of the moving rod 303;

[0034] Specifically, the tooth block 301 is meshed and connected with the gear 204. A spring 304 is sleeved on the outer surface of the moving rod 303. One end of the spring 304 is fixedly connected to the fixing plate 302, and the other end of the spring 304 is fixedly connected to the tooth block 301;

[0035] Furthermore, the operator drives the tooth block 301 to move outwards away from the gear 204 by pulling the moving rod 303 and the spring 304 outwards, and drives the tooth block 301 to move inwards again to be meshed and connected with the gear 204 by the elastic force of the spring 304 itself to limit its position, avoiding the situation that the gear 204 rotates randomly.

[0036] Working principle: During the use of the device, the round nose cutter 1 is used to cut the workpiece. When the cutting task of the workpiece changes and it is necessary to process deep cavities or shallow contours, the operator pulls the moving rod 303 and the spring 304 outwards to drive the tooth block 301 to move outwards and away from the gear 204. At this time, the gear 204 loses its fixed limit. The operator holds the rotating handle 205 and drives the gear 204 and the screw rod 203 to rotate, driving the round nose cutter 1 to move vertically outwards under the cooperation of the slider 202 and the chute 201, adjusting the length of the round nose cutter 1 used. By flexibly adjusting the length of the round nose cutter 1 extending out of the tool holder 101, the processing requirements of different depths can be met, so as to ensure that both the required cutting depth can be achieved and the dynamic performance and stability of the tool are not affected, improving the practicability of the device. After the adjustment is completed, the operator releases the moving rod 303, and the tooth block 301 is driven by the elastic force of the spring 304 to move inwards again and engage with the gear 204 to limit its position, avoiding the situation that the gear 204 rotates randomly and improving the stability of the device during use.

[0037] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An adjustable round nose knife, comprising a round nose knife (1), characterized in that: The outer surface of the round nose knife (1) is movably connected to a knife handle (101), the inner cavity of the knife handle (101) is provided with an adjustment mechanism (2), and one end of the knife handle (101) is provided with a limit mechanism (3); The adjusting mechanism (2) comprises two sliding blocks (202) symmetrically fixedly connected to the outer surface of the round nose knife (1); a screw rod (203) is rotatably connected to the inner cavity of the knife handle (101); and a gear (204) is fixedly connected to one end of the screw rod (203); The limiting mechanism (3) comprises a fixing plate (302) fixedly connected to one end of the knife handle (101), a moving rod (303) being inserted into the inner cavity of the fixing plate (302), and a tooth block (301) being fixedly connected to the lower end of the moving rod (303).

2. An adjustable round nose knife according to claim 1, characterized in that: The inner cavity of the knife handle (101) is provided with a sliding groove (201), and the sliding block (202) moves in the sliding groove (201).

3. An adjustable round nose knife according to claim 1, characterized in that: The inner cavity of the round nose knife (1) is provided with a thread, and the inner cavity of the round nose knife (1) is threadedly connected to the outer surface of the screw rod (203).

4. An adjustable round nose knife according to claim 1, characterized in that: A rotating handle (205) is fixedly connected to one side of the gear (204), and a rubber sleeve is fixedly connected to the outer surface of the rotating handle (205).

5. An adjustable round nose knife according to claim 1, characterized in that: The tooth block (301) and the gear (204) are meshed and connected, and a spring (304) is sleeved on the outer surface of the moving rod (303).

6. An adjustable round nose knife according to claim 5, characterized in that: One end of the spring (304) is fixedly connected to the fixed plate (302), and the other end of the spring (304) is fixedly connected to the gear block (301).

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