Handheld clamping tool for tiny parts

Abstract

The handheld clamping tool comprises a lengthening rod, a clamping head, a pressing device and a fixing device, the front end of the lengthening rod is in threaded connection with the clamping head, the front end of the clamping head is a circular truncated cone, a long groove in the axial direction is machined in the side wall of the clamping head, a round hole used for installing a shaft is formed in the opposite position of the side wall of the long groove, and the pressing device is connected with the fixing device. The fixing device is installed on the front side of the long groove and connected with the clamping head through a shaft, the pressing device is installed on the rear side of the long groove and connected with the clamping head through a shaft, and the top face of the front end of the pressing device abuts against the bottom face of the rear end of the fixing device. The device is compact in structure and small in size, can effectively realize clamping of tiny parts, avoids the conditions of inconvenient hand holding and operator contusion caused by too small parts, eliminates potential safety hazards in the machining process, reduces the filing time and energy of production operators, and improves the production efficiency. An operator can be assisted in clamping and filing key type tiny parts only through simple steps, the product machining efficiency is improved, and the product precision is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of tiny parts processing tooling, and in particular relates to a hand-held clamping tool for tiny key parts the size of rice grains. Background Art

[0002] The transmission key product is currently used as a newly developed product in the spacecraft servo power system, which is used for the connection and actuation transmission between different parts. The two mating parts are processed with a square groove that closely matches the size of the transmission key at the assembly of the transmission key. In order to ensure that the transmission key is installed in place smoothly, the transmission key needs to be blunted on all sides.

[0003] The transmission key is shaped like a grain of rice, with a size of 6mm×3mm×2mm. Since the parts are small and there is no effective clamping tool or method, the current blunting operation is performed by directly holding the parts manually. In the actual operation, it is often the case that the parts are too small to hold steadily, and the strength cannot be controlled after holding them hard, resulting in hand contusions. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a handheld clamping tool for tiny parts, which ensures stable clamping of the parts and solves the problem of inconvenient operation of the current micro transmission parts.

[0005] The technical solution adopted by the present invention is: a handheld clamping tool for tiny parts, including an extension rod, a clamping head, a presser, and a fixer. The front end of the extension rod is threadedly connected to the clamping head, and the front end of the clamping head is a truncated cone. A long groove along the axial direction is processed on the side wall of the clamping head, and a circular hole for installing the shaft is provided at a relative position of the side wall of the long groove. The fixer is installed on the front side of the long groove, and the fixer is connected to the clamping head shaft. The presser is installed on the rear side of the long groove, and the presser is connected to the clamping head shaft. The front end top surface of the presser is against the rear end bottom surface of the fixer, and the fixer is driven to rotate around the shaft connected to the fixer by the presser rotating around the shaft connected to the presser, so that the distance between the front end of the fixer and the front end of the clamping head changes. The front end of the clamping head is an L-shaped notch for installing parts.

[0006] Preferably, the front end of the fixture that contacts the part is a chuck portion, and the chuck portion is a special-shaped surface formed by a combination of a plane and an arc surface. The plane is the contact surface that is opposite to the surface of the part when the part is clamped, and the arc surface is located behind the plane to prevent the fixture from interfering with the surface of the part and affecting the rotation when it rotates around the axis to release the part.

[0007] Preferably, the L-shaped slot includes a short side surface and a long side surface connected at right angles, the length of the long side surface is the same as the height of the part, and when the fixture is rotated until the plane of the clamping head is parallel to the short side surface, the plane and the short side surface are respectively pressed against the upper and lower surfaces of the part to clamp the part.

[0008] Preferably, the included angle between the short side surface and the front end surface of the clamping head is an acute angle, and when the part is clamped between the clamping head and the fixture, at least one edge to be blunted protrudes from the front end surface of the clamping head.

[0009] Preferably, at least one half of the volume of the part is clamped in the cavity formed between the clamping head and the fixture.

[0010] Preferably, the L-shaped notch and the surface of the clamping head in contact with the part are covered with a felt pad to reduce damage to the surface of the part caused by the overly soft part when clamping.

[0011] The beneficial effects of the present invention are as follows: the present invention has a compact structure and a small size, can effectively realize the clamping of tiny parts, avoids the inconvenience of holding and injury to operators caused by parts being too small, eliminates potential safety hazards in the processing process, reduces the time and energy of production operators on filing and repairing, and only requires simple steps to assist operators in clamping and filing tiny key parts, thereby improving the processing efficiency of the product and ensuring the product accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a schematic diagram of the structure of a handheld clamping tool for tiny parts.

[0013] Figure 2 Schematic diagram of the parts clamping state.

[0014] Figure 3 This is a schematic diagram of the loosened state of the parts.

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of a handheld clamping tool.

[0016] Figure numerals: 1-extension rod, 2-presser, 3-clamping head, 4-fixer, 5-part, 301-long groove, 302-short side surface, 303-long side surface, 401-plane surface, 402-arc surface. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The "front side" mentioned herein refers to Figure 1 Left side direction, "back side" refers to Figure 1 Right direction; the top surface of the structure refers to Figure 1 The upper structural surface of the structure in the direction of the view shown, the bottom surface of the structure refers to Figure 1 The view direction shown is the lower structural surface of the structure.

[0018] like Figure 1As shown, a hand-held clamping tool for tiny parts includes an extension rod 1, a clamping head 3, a presser 2, and a fixer 4. The front end of the extension rod 1 is threadedly connected to the clamping head 3. The extension rod 1 is a standard part and can be used with clamping heads 3 of different specifications, which is convenient for storage and grasping. The front end of the clamping head 3 is a truncated cone, and the rear end transitions to a cylinder, which is threadedly connected to the extension rod 1. An axially long groove 301 is machined on the side wall of the clamping head 3. The front end of the long groove 301 passes through the front end of the clamping head 3. The bottom surface of the front side of the long groove 301 is a sloped surface, and the shape of the bottom surface of the rear side groove matches the shape of the bottom surface of the presser 2. The side walls of the long groove 301 are provided with two circular holes for installing the shaft at the front and rear positions, such as Figure 4 As shown, a fixture 4 is installed on the front side of the long slot 301, and the fixture 4 is connected to the clamping head 3 through an axis. A pusher 2 is installed on the rear side of the long slot 301, and the pusher 2 is connected to the clamping head 3 through an axis. The front end top surface of the pusher 2 is against the rear end bottom surface of the fixture 4. The pusher 2 rotates around the axis connected to the pusher 2 to drive the fixture 4 to rotate around the axis connected to the fixture 4 so that the distance between the front end of the fixture 4 and the front end of the clamping head 3 changes. The front end of the clamping head 3 is an L-shaped notch for installing parts. The L-shaped notch includes a short side surface 302 and a long side surface 303 connected at right angles. The length of the long side surface 303 is the same as the height of the part 5. Figure 2 As shown, when the fixture 4 rotates to the point where the plane 401 of the clamping head is parallel to the short side surface 302, the plane 401 and the short side surface 302 respectively press against the upper and lower surfaces of the part 5 to clamp the part 5. The short side surface 302 and the front end surface of the clamping head 3 form an acute angle, and when the part 5 is clamped between the clamping head 3 and the fixture 4, at least one edge to be blunted protrudes from the front end surface of the clamping head 3. At the same time, at least half of the volume of the part 5 is clamped in the cavity formed between the clamping head 3 and the fixture 4 to ensure the stability of the clamping.

[0019] like Figure 2 and Figure 3 As shown, the front end of the fixture 4 and the contact part 5 are the chuck parts, which are special-shaped surfaces formed by the combination of the plane 401 and the arc surface 402. The plane 401 is the contact surface that contacts the surface of the part 5 when the part 5 is clamped, and the arc surface 402 is located behind the plane 401 to prevent the fixture 4 from interfering with the surface of the part 5 when the part 5 is rotated around the axis to release the part 5 and affecting the rotation. The L-shaped notch and the contact surfaces of the chuck parts with the parts, i.e., the short side surface 302, the long side surface 303 and the plane 401, are covered with felt pads to reduce the damage to the surface of the part 5 caused by the overly soft (such as copper, aluminum and other soft alloys) part 5 when clamping.

[0020] When clamping part 5, part 5 is placed at the L-shaped notch of the clamp 3. After part 5 is placed in place, the fixture 4 rotates around the axis, the relative position of the clamping head 3 remains unchanged, and part 5 contacts and gradually presses the clamping part of the fixture 4, the plane 401. Finally, the purpose of clamping is achieved. After the filing is completed, the fixture 4 rotates in the opposite direction around the axis to eliminate the clamping force between the part 5 and the part 5. Finally, the part 5 is disengaged from the clamping tool, and the part 5 is taken out.

[0021] like Figure 4 As shown, the clamping tool of the present invention converts the pressing force of the hand into the clamping force of the part 5 by a secondary conduction method. After the part 5 is installed in the L-shaped notch and placed in place, the hand presses the part of the rear side of the presser 2 protruding from the clamping head 3, and transmits the pressing force to the contact part between the presser 2 and the fixture 4 through the rotating shaft. After the force is transmitted, it is finally transmitted to the contact part between the fixture 4 and the part 5, that is, the plane 401, through the rotating shaft on the fixture 4, to achieve the transmission of the hand force. The clamping force of the part 5 is proportional to the force pressed by the hand, so that the operator can control the pressing force when filing to meet the actual use requirements of the part 5.

[0022] The above are specific embodiments of the present invention and the technical principles used. Any modifications and equivalent changes based on the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A handheld clamping tool for tiny parts, characterized by: It includes an extension rod, a clamping head, a presser, and a fixer. The front end of the extension rod is threadedly connected to the clamping head. The front end of the clamping head is a truncated cone. An axial long groove is processed on the side wall of the clamping head. A circular hole for installing the shaft is provided at a relative position of the side wall of the long groove. The fixer is installed on the front side of the long groove and is connected to the clamping head shaft. The presser is installed on the rear side of the long groove and is connected to the clamping head shaft. The front end top surface of the presser is against the rear end bottom surface of the fixer. The presser is rotated around the shaft connected to the presser to drive the fixer to rotate around the shaft connected to the fixer so that the distance between the front end of the fixer and the front end of the clamping head changes. The front end of the clamping head is an L-shaped notch for installing parts.

2. A handheld clamping tool for tiny parts according to claim 1, characterized in that: The front end of the fixture that contacts the part is the chuck part, which is a special-shaped surface formed by a combination of a plane and an arc surface. The plane is the contact surface that is in contact with the surface of the part when the part is clamped, and the arc surface is located behind the plane to prevent the fixture from interfering with the surface of the part and affecting the rotation when it rotates around the axis to release the part.

3. A handheld clamping tool for tiny parts according to claim 2, characterized in that: The L-shaped slot includes a short side and a long side connected at right angles, the length of the long side is the same as the height of the part, and when the fixture is rotated until the plane of the clamping head is parallel to the short side, the plane and the short side respectively press against the upper and lower surfaces of the part to clamp the part.

4. A handheld clamping tool for tiny parts according to claim 3, characterized in that: The included angle between the short side surface and the front end surface of the clamping head is an acute angle, and when the part is clamped between the clamping head and the fixture, at least one edge to be blunted protrudes from the front end surface of the clamping head.

5. A handheld clamping tool for tiny parts according to claim 3, characterized in that: At least one-half of the volume of the part is clamped in the cavity formed between the clamping head and the fixture.

6. A handheld clamping tool for tiny parts according to claim 3, characterized in that: The L-shaped slot and the surface of the chuck head that contacts the part are covered with felt pads.

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