Rotary tungsten needle holder

Abstract

The utility model belongs to the technical field of tungsten needle clamping devices, and particularly discloses a rotary tungsten needle clamping device which comprises a clamping head, one end of the clamping head is provided with a clamping hole in the axial direction, a tungsten needle can be inserted into the clamping hole, the other end of the clamping head is provided with an inserting rod in the axial direction, and the inserting rod is sleeved with a handle in a rotating mode. And the clamping head and the inserting rod synchronously rotate relative to the handle. According to the rotary tungsten needle clamping device, the inserting rod is axially arranged on the clamping head, so that the clamping head is rotationally connected with the handle through the inserting rod, the clamping head clamping a tungsten needle can rotate relative to the handle in the tungsten needle grinding process, the grinding requirement is lowered, grinding is easy and stable, and a user can use the rotary tungsten needle clamping device conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of tungsten needle holders, in particular to a rotary tungsten needle holder. Background Art

[0002] Tungsten needle is a tungsten product made of pure tungsten or tungsten alloy with a slender structure. It can be used as an electrode material in argon arc welding technology, and can also be used as an instrument probe. Since tungsten is a refractory metal material, it is resistant to high temperatures, has good conductivity and high strength. During argon arc welding, the tungsten needle acts as an electric needle to conduct current, ignite the arc and maintain stable arc burning. When the tungsten needle is used as an electrode, its end needs to be ground to a certain cone angle before use to make the arc more concentrated.

[0003] Since the tip of the tungsten needle is prone to overheating during grinding, a clamp is needed to clamp the tungsten needle for grinding to prevent scalding the user. The existing clamp mainly utilizes a tungsten needle pen cover and a tungsten needle pen holder to threadedly connect, and then push the tungsten needle chuck to clamp the tungsten needle. When in use, the user only needs to hold the handheld end of the clamp to grind the tungsten needle. Since the clamp needs to be manually rotated during the grinding process to grind the tip of the tungsten needle evenly, the grinding requirements are high, and the grinding is laborious and unstable, which brings many inconveniences to the user's grinding process.

[0004] Therefore, the inventor is committed to designing a tungsten needle holder to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a rotary tungsten needle holder, which has low grinding requirements and is easy and stable in grinding.

[0006] In order to achieve the above object, a technical solution adopted by the utility model is:

[0007] A rotary tungsten needle clamp comprises a clamping head, one end of the clamping head is provided with a clamping hole for inserting the tungsten needle along its axial direction, the other end of the clamping head is provided with a plug rod along its axial direction, a handle is rotatably sleeved outside the plug rod, and the clamping head and the plug rod rotate synchronously relative to the handle.

[0008] As an improvement of the rotary tungsten needle holder of the utility model, a plurality of bearings are sleeved at intervals on the plug-in rod, and the plug-in rod is rotatably connected to the handle through the plurality of bearings.

[0009] As an improvement of the rotary tungsten needle clamp of the utility model, one of the bearings is arranged on the step at the end of the plug-in rod, a screw is threadedly connected on the end surface of the plug-in rod, and the plug-in rod is fixedly connected to the inner ring of the corresponding bearing through the screw.

[0010] As an improvement of the rotary tungsten needle clamp of the utility model, the clamping head includes a clamping seat, a clamping sleeve and a plurality of clamps, the clamping seat is located between the clamping sleeve and the handle and the three are coaxially arranged, and the plurality of clamps are arranged in a circle in the clamping sleeve.

[0011] As an improvement of the rotary tungsten needle holder of the utility model, one end of the clamp seat extends along its axial direction into the sleeve to form a connecting portion, and the other end of the clamp seat extends outward along its axial direction to form the plug rod.

[0012] As an improvement of the rotary tungsten needle clamp of the utility model, the connecting part is threadedly connected to the sleeve, a socket is provided on the end surface of the connecting part, and a through hole surrounded by a plurality of the clamps is coaxially arranged with the socket and combined to form the clamping hole.

[0013] As an improvement of the rotary tungsten needle clamp of the utility model, an end cover of the handle away from the clamping head is provided with an end cover, and a gasket is provided between the end cover and the handle.

[0014] As an improvement of the rotary tungsten needle holder of the utility model, an inserting portion is provided on the covering surface of the end cover, and the inserting portion is inserted into the handle and threadedly connected with the handle.

[0015] As an improvement of the rotary tungsten needle holder of the utility model, the end of the end cover is hemispherical.

[0016] Compared with the prior art, the rotary tungsten needle holder of the utility model, by axially arranging a plug-in rod on the clamping head, makes the clamping head rotatably connected with the handle through the plug-in rod, so that during the tungsten needle grinding process, the clamping head holding the tungsten needle can rotate relative to the handle, thereby reducing the grinding requirements, and the grinding is easy and stable, which is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional enlarged view of the rotary tungsten needle holder of the utility model;

[0018] Figure 2 It is a three-dimensional exploded view of the rotary tungsten needle holder of the utility model;

[0019] Figure 3 It is a three-dimensional enlarged view of the rotary tungsten needle clamp of the utility model, in which the clamping head and the handle are in a separated state;

[0020] Figure 4 It is a three-dimensional exploded enlarged view of the handle, gasket and end cover of the utility model;

[0021] Figure 5 It is a three-dimensional exploded enlarged view of the clamping head of the utility model;

[0022] Figure 6 It is a three-dimensional exploded enlarged view of the clamping head of the utility model from another perspective;

[0023] Figure 7 It is an enlarged cross-sectional view of the clamping seat of the utility model;

[0024] Figure 8 It is a partial cross-sectional enlarged view of the rotary tungsten needle holder of the utility model.

[0025] Illustration Description:

[0026] 1. Handle; 2. Clamping head; 21. Clamping seat; 211. Connecting part; 212. Socket; 213. Connecting rod; 214. Step; 215. Connecting hole; 22. Jacket; 23. Clamping head; 3. First bearing; 31. Screw; 4. Second bearing; 5. End cover; 51. Inserting part; 6. Washer; 7. Tungsten needle. DETAILED DESCRIPTION

[0027] The following is a detailed explanation of the implementation of the present invention in conjunction with the accompanying drawings. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention.

[0028] Reference Figures 1 to 8 A rotary tungsten needle clamp comprises a clamping head 2 and a handle 1. One end of the clamping head 2 is provided with a clamping hole for inserting the tungsten needle 7 along its axial direction, and the other end of the clamping head 2 is provided with a plug-in rod 213 along its axial direction. The handle 1 is rotatably sleeved outside the plug-in rod 213, and the clamping head 2 and the plug-in rod 213 rotate synchronously relative to the handle 1.

[0029] Reference Figures 5 to 8 The clamping head 2 includes a clamping seat 21, a clamping sleeve 22 and a plurality of clamping heads 23.

[0030] The clamp seat 21 is located between the clamp sleeve 22 and the handle 1 and the three are coaxially arranged. The upper end of the clamp seat 21 extends outward along its axial direction to form the plug rod 213. The diameter of the clamp seat 21 is larger than the diameter of the plug rod 213 to form a step. The end of the plug rod 213 is provided with a step 214. The top surface of the plug rod 213 is provided with a connecting hole 215. The plug rod 213 is located in the handle 1. The lower end of the clamp seat 21 extends along its axial direction into the clamp sleeve 22 to form a connecting hole 215. The outer wall of the connecting portion 211 is provided with a thread, and a plug hole 212 is provided on the end surface of the bottom of the connecting portion 211. The plug hole 212 and the connecting hole 215 are arranged along the axial direction of the clamp seat 21 and the two are separated. The plug hole 212 can pass through the clamp seat 21 along the axial direction of the clamp seat 21 and extend into the plug rod 213. The clamp seat 21, the plug rod 213 and the connecting portion 211 are coaxial and formed integrally from the same material. The upper end of the jacket 22 is the connecting end. The lower end of the jacket 22 is a clamping end, and a thread is provided on the inner wall of the connecting end of the jacket 22. The connecting end of the jacket 22 is sleeved on the connecting portion 211 on the clamp seat 21 and is threadedly connected with the connecting portion 211. The clamping end of the jacket 22 is set in a conical shape, and a clamping hole is provided on the bottom end surface of the jacket 22. A plurality of chucks 23 are located in the clamping hole of the jacket 22. Two adjacent chucks 23 are elastically connected. The plurality of chucks 23 are arranged in a circle in the clamping hole of the jacket 22. The plurality of chucks 23 are arranged in a circle in the clamping hole of the jacket 22. The outer wall of 23 is inclined and matched with the tapered wall of the sleeve 22. The through hole surrounded by multiple chucks 23 is coaxially arranged with the jack 212 and combined to form the clamping hole. The clamping head 2 of the utility model can be directly purchased from the existing micro electric grinder hexagonal drill chuck on the market, or the tungsten needle 7 can be clamped by the chuck clamping principle disclosed in the Chinese utility model patent (application number 201620296407.8 or 201620389157.2).

[0031] Reference Figure 2 , Figure 3 and Figure 8 The plug-in rod 213 is inserted into the handle 1, and a plurality of bearings are sleeved on the plug-in rod 213 at intervals. The plug-in rod 213 is rotatably connected to the handle 1 through the plurality of bearings. The utility model preferably has two bearings, and the two bearings are specifically a first bearing 3 and a second bearing 4. The first bearing 3 and the second bearing 4 are arranged at intervals, wherein the first bearing 3 is sleeved on the step 214 at the top of the plug-in rod 213, and the top of the plug-in rod 213 is fixedly connected to the inner ring of the first bearing 3 by a screw 31 (that is, the screw 31 is threadedly connected to the connecting hole 215 at the top of the plug-in rod 213, and the nut of the screw 31 presses against the inner ring of the first bearing 3), and the second bearing 4 is located below the first bearing 3, and the second bearing 4 is sleeved on the step formed by the plug-in rod 213 and the clamp seat 21.

[0032] Reference Figure 2 , Figure 3 , Figure 4 and Figure 8The handle 1 is cylindrical, and an end cover 5 is provided at one end of the handle 1 away from the clamping head 2 (i.e., the top end of the handle 1), and an insertion portion 51 is provided on the covering surface of the end cover 5. The insertion portion 51 is inserted into the handle 1 and is threadedly connected to the handle 1. The end (i.e., the top end) of the end cover 5 is hemispherical, and an annular gasket 6 is provided between the end cover 5 and the handle 1.

[0033] Reference Figures 1 to 8 The method of using the rotary tungsten needle holder of the utility model is as follows:

[0034] Hold the clamp seat 21 with one hand, and use the other hand to rotate and loosen the clamp sleeve 22, so that the through hole surrounded by the multiple clamps 23 becomes larger, insert the tungsten needle 7 to be ground from the clamp hole of the clamp sleeve 22 into the insertion hole 212 of the clamp seat 21, and rotate the clamp sleeve 22 again to make the through hole surrounded by the multiple clamps 23 smaller and clamp the tungsten needle 7. At this time, the clamp sleeve 22 and the clamp seat 21 are threaded together;

[0035] Hold the handle 1 of the clamp and insert the end of the tungsten needle to be ground held by the clamping head 2 into the grinding hole of the grinder. Under the rotation of the grinding sheet of the grinder, the tungsten needle 7 and the entire clamping head 2 will rotate synchronously relative to the handle 1. The user does not need to rotate the clamp by himself and can grind easily.

[0036] After grinding is completed, the chuck 22 only needs to be rotated in the reverse direction to loosen the plurality of chucks 23, and the ground tungsten needle 7 can be removed.

[0037] The rotary tungsten needle holder of the utility model adopts a multi-bearing design for the handle 1 and the clamping seat 21, so that the entire clamping head 2 can rotate relative to the handle 1, thereby making the grinding rotation more uniform and smooth, and the grinding easier and more stable. Without replacing the clamping head 2, it can clamp tungsten needles 7 of more specifications such as 1.0, 1.6, 2.0, 2.4, 3.2, 4.0, 5.0, 6.0, etc. The depth of the clamping hole can be designed to reach 83mm, so that the tungsten needle 7 can be inserted more and the grinding is more accurate.

[0038] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of protection of the present invention. Therefore, equivalent changes made within the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A rotary tungsten needle holder, characterized in that: It comprises a clamping head, one end of which is provided with a clamping hole for inserting a tungsten needle along its axial direction, the other end of which is provided with a plug rod along its axial direction, a handle is rotatably sleeved outside the plug rod, and the clamping head and the plug rod rotate synchronously relative to the handle.

2. The rotary tungsten needle holder according to claim 1, characterized in that: A plurality of bearings are sleeved at intervals on the plug-in rod, and the plug-in rod is rotatably connected to the handle via the plurality of bearings.

3. The rotary tungsten needle holder according to claim 2, characterized in that: One of the bearings is arranged on a step at the end of the plug-in rod, a screw is threadedly connected on the end surface of the plug-in rod, and the plug-in rod is fixedly connected to the inner ring of the corresponding bearing through the screw.

4. The rotary tungsten needle holder according to claim 1, characterized in that: The clamping head comprises a clamping seat, a clamping sleeve and a plurality of clamping heads. The clamping seat is located between the clamping sleeve and the handle and the three are coaxially arranged. The plurality of clamping heads are arranged in a circle in the clamping sleeve.

5. The rotary tungsten needle holder according to claim 4, characterized in that: One end of the clamp seat extends along its axial direction into the jacket to form a connecting portion, and the other end of the clamp seat extends outward along its axial direction to form the plug-in rod.

6. The rotary tungsten needle holder according to claim 5, characterized in that: The connecting part is threadedly connected to the sleeve, an insertion hole is arranged on the end surface of the connecting part, and a through hole surrounded by a plurality of the clamps is coaxially arranged with the insertion hole and combined to form the clamping hole.

7. The rotary tungsten needle holder according to claim 1, characterized in that: An end cover of the handle away from the clamping head is provided with an end cover, and a gasket is provided between the end cover and the handle.

8. The rotary tungsten needle holder according to claim 7, characterized in that: An inserting portion is provided on the covering surface of the end cover, and the inserting portion is inserted into the handle and is threadedly connected with the handle.

9. The rotary tungsten needle holder according to claim 7, characterized in that: The end of the end cap is hemispherical.

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