CN220555002U - Clamp - Google Patents

Abstract

The utility model belongs to the technical field of clamping, and discloses a clamp. The fixture comprises a mounting seat, a pressing part and a first fixing part, wherein the mounting seat is provided with a containing groove, the containing groove comprises a first pressing surface, the pressing part and a rod body to be processed are arranged in the containing groove, the pressing part and the first pressing surface are arranged along the radial interval of the rod body to be processed to form a processing space for containing a cutter, the pressing part comprises a second pressing surface, the first pressing surface and the second pressing surface are obliquely arranged and are mutually separated from the bottom surface from the opening of the containing groove to the containing groove, and the first fixing part is used for fixing the pressing part and the mounting seat so that the first pressing surface, the second pressing surface and the bottom surface of the containing groove can be clamped together to be processed. When the clamp is used for clamping the rod-shaped workpiece, the clamp can not interfere with the cutter, and the cutter can form an uninterrupted longer milling plane on the rod-shaped workpiece.

Description

Clamp

Technical Field

The utility model relates to the technical field of clamping, in particular to a clamp.

Background

Milling is a machining method for machining the surface of an object by using a milling cutter as a cutter. When milling a rod-shaped workpiece, in order to avoid the influence of running of the workpiece on the milling precision of the workpiece during milling, the rod-shaped workpiece needs to be clamped and fixed and then milled.

In the prior art, some clamps can clamp and fix a rod-shaped workpiece, but when the clamps clamp, a part of the clamps can be positioned in a processing space of a milling cutter, so that for some rod-shaped workpieces with longer milling areas, the milling cutter can interfere with the clamps during milling, and the clamps can influence the milling cutter to form an uninterrupted longer milling plane on the rod-shaped workpiece.

Therefore, a new clamp is needed to solve the problem that the milling cutter cannot form an uninterrupted and long milling plane on the rod-shaped workpiece.

Disclosure of Invention

The utility model aims to provide a clamp, and a cutter can form an uninterrupted long milling plane on a rod-shaped workpiece when the clamp is used for clamping the rod-shaped workpiece.

To achieve the purpose, the utility model adopts the following technical scheme:

a clamp, comprising:

the mounting seat is provided with a containing groove, and the containing groove comprises a first pressing surface;

the pressing piece and the rod body to be processed are arranged in the accommodating groove, the pressing piece and the first pressing surface are arranged at intervals along the radial direction of the rod body to be processed so as to form a processing space for accommodating a cutter, the pressing piece comprises a second pressing surface, and the first pressing surface and the second pressing surface are obliquely arranged and are mutually far away from each other from the opening of the accommodating groove to the bottom surface of the accommodating groove; and

the first fixing piece is used for fixing the pressing piece and the mounting seat, so that the first pressing surface, the second pressing surface and the bottom surface jointly clamp the rod body to be processed.

As the optimal scheme of anchor clamps, the quantity of second is supported and is pressed the face, the holding tank has along the length direction of waiting to process the stick body extends central line L, two the second is supported and is pressed the face and is arranged symmetrically in the both sides of central line L, every the second is supported and is pressed the face, the first that corresponds is supported and is pressed the face and the bottom surface cooperatees in order to centre gripping one wait to process the stick body.

As a preferable scheme of the clamp, the first pressing surface and the bottom surface form a first included angle alpha ₁ The second pressing surface and the bottom surface form a second included angle alpha ₂ The first included angle alpha ₁ With the second included angle alpha ₂ Equal.

As a preferable mode of the clamp, the first included angle alpha ₁ And the second included angle alpha ₂ All are 60-65 degrees.

As a preferable scheme of the clamp, the number of the pressing pieces is one, and the pressing pieces extend along the length direction of the rod body to be processed; or (b)

The number of the pressing pieces is at least two, and the at least two pressing pieces are arranged at intervals along the length direction of the rod body to be processed.

As the preferred scheme of anchor clamps, anchor clamps still include the locating part, the holding groove is followed wait to process the length direction of the barred body and link up and form the through-hole, the locating part will arbitrary the shutoff of through-hole, wait to process the one end of barred body with the locating part butt.

As a preferred aspect of the fixture, the mounting base further includes:

the upper end face is positioned above the first pressing face and is in transitional connection with the first pressing face through the first convex cambered face.

As a preferred aspect of the jig, the pressing member further includes:

the upper surface is positioned above the second pressing surface, and the upper surface is in transitional connection with the second pressing surface through the second outer convex cambered surface.

As a preferable scheme of the clamp, the rod body to be processed is processed by the cutter to form a processing surface, and the processing surface is higher than the upper end surface and the upper surface.

As a preferable mode of the clamp, the pressing piece further comprises a lower surface, and when the first pressing surface, the second pressing surface and the bottom surface jointly clamp the rod body to be processed, a gap delta t is formed between the lower surface and the bottom surface.

The beneficial effects are that:

the utility model provides a novel anchor clamps, the clamp piece and the bar-shaped work piece body of this anchor clamps set up in the storage tank, and when the first face of supporting presses, the second supports the face and the bottom surface in storage tank centre gripping bar-shaped work piece jointly, compress tightly the face and be used for holding the waiting processing space of cutter with first the face of supporting, when the cutter is milling to bar-shaped work piece like this, anchor clamps can not take place to interfere with the cutter, consequently, when using this anchor clamps centre gripping bar-shaped work piece, the cutter can form incessant and longer milling plane on bar-shaped work piece.

Drawings

FIG. 1 is a schematic view of a structure of a clamp according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a mounting seat according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a compressing member according to an embodiment of the present utility model;

fig. 4 is a side view of a clamp provided by an embodiment of the present utility model.

In the figure:

1. a mounting base; 11. a receiving groove; 111. a first pressing surface; 112. a bottom surface; 113. a through hole; 12. an upper end surface; 13. a sidewall surface; 14. the first convex cambered surface;

2. a pressing member; 21. a second pressing surface; 22. an upper surface; 23. a lower surface; 24. a second outwardly convex cambered surface;

3. a limiting piece;

4. a first fixing member;

5. a second fixing member;

100. a rod body to be processed; 110. and (5) processing the surface.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Milling is a mechanical processing method for processing the surface of an object by taking a milling cutter as a cutter, and has high working efficiency, so that the milling method is widely applied. During milling, it is often necessary to mill a rod-shaped workpiece, and to machine a plane, a groove, a special shape, etc. on the surface of the workpiece for subsequent use.

In the field of medical devices, there are also a number of products which require milling, such as the support rods of orthopedic external fixation stents. The external fixing support for orthopaedics is mainly used for fracture treatment and skeleton reconstruction and comprises spicules, steel rings and supporting rods, one ends of the spicules are inserted into bones, the steel rings at the other ends of the spicules are connected, the external fixing support for orthopaedics generally comprises a plurality of steel rings, the plurality of steel rings are supported by the supporting rods, and meanwhile the supporting rods and the steel rings are fixed by fixing pieces. The bracing piece is bar-shaped work piece, mills on the bracing piece and has the plane, and when bracing piece and steel ring were connected, the mounting butt realized the firm connection of bracing piece and steel ring on the plane, guaranteed that the relative position of two adjacent steel rings does not change, and the plane can also prevent that the mounting from taking place relative rotation with bar-shaped bracing piece simultaneously. In addition, because the injured positions of all patients are different, the connection positions of the steel ring and the supporting rod need to be adjusted according to actual conditions, and therefore the milling plane on the supporting rod needs to be longer and uninterrupted.

Because the rod-shaped workpiece has a special shape, the rod-shaped workpiece is easy to displace or rotate under the driving of the acting force of the milling cutter during milling, so that the milling precision is influenced, and the workpiece is clamped and fixed by a clamp during milling and then is subjected to milling. However, when the existing clamp clamps the rod-shaped workpiece, a part of the clamp is positioned in the processing space of the milling cutter, so that for some rod-shaped workpieces with longer milling areas, the milling cutter can interfere with the clamp during milling, the clamp can influence the milling cutter to form an uninterrupted longer milling plane on the rod-shaped workpiece, and the existing clamp is not suitable for milling of the workpiece similar to the support rod.

To solve the above-mentioned problems, as shown in fig. 1, the embodiment of the disclosure provides a fixture, the fixture includes a mounting base 1, a pressing member 2 and a first fixing member 4, the mounting base 1 is provided with a receiving groove 11, the receiving groove 11 includes a first pressing surface 111, the pressing member 2 and a rod body 100 to be processed are disposed in the receiving groove 11, the pressing member 2 and the first pressing surface 111 are disposed at intervals along a radial direction of the rod body 100 to be processed to form a processing space for accommodating a tool, the pressing member 2 includes a second pressing surface 21, the first pressing surface 111 and the second pressing surface 21 are disposed obliquely and are separated from each other from an opening of the receiving groove 11 to a bottom surface 112 of the receiving groove 11, and the first fixing member 4 fixes the pressing member 2 and the mounting base 1 so that the first pressing surface 111, the second pressing surface 21 and the bottom surface 112 clamp the rod body 100 to be processed together. The fixture can clamp and fix the rod body 100 to be processed, after the rod body 100 to be processed is clamped, the cutter mills the rod body 100 to be processed in the processing space, the fixture cannot interfere with the cutter in the processing process, so that the cutter can form an uninterrupted longer milling plane on the rod body 100 to be processed, and in the embodiment of the disclosure, the length of the milling plane is about 70% -90% of the length of the rod body 100 to be processed.

Specifically, as shown in fig. 1, the first fixing member 4 is a screw, and the screw connection is stable and the assembly and the disassembly are convenient. Of course, other structures such as pins, snaps, etc. that perform the securing function are within the scope of the disclosed embodiments.

As shown in fig. 1 and 2, the number of the second pressing surfaces 21 is two, the accommodating groove 11 has a center line L extending along the length direction of the rod 100 to be processed, the two second pressing surfaces 21 are symmetrically arranged at two sides of the center line L, and each second pressing surface 21, the corresponding first pressing surface 111 and the bottom surface 112 cooperate to clamp one rod 100 to be processed. The clamp can clamp and fix two rod bodies 100 to be processed simultaneously, so that efficient milling of the rod bodies 100 to be processed is realized, and the working efficiency is improved.

As shown in fig. 1, the number of the pressing members 2 is at least two, and the at least two pressing members 2 are arranged at intervals along the length direction of the rod body 100 to be processed. At least two compacting pieces 2 can guarantee to wait to process the steady fixed of the stick body 100, and the interval arrangement of compacting pieces 2 can reserve bigger processing space for the cutter simultaneously, more makes things convenient for the cutter to wait to process the milling process of stick body 100.

In addition, the number of the pressing members 2 can be adaptively adjusted according to the length of the rod body 100 to be processed by the fixture, so long as the clamping and fixing effects of the fixture on the rod body 100 to be processed are ensured, and the use flexibility of the fixture is higher.

In other embodiments, the number of pressing members 2 may be one, and the pressing members 2 extend along the length direction of the rod 100 to be processed. One pressing piece 2 can be more convenient to assemble and disassemble the pressing piece 2 and the mounting seat 1, so that the assembling and disassembling speed of the clamp is higher.

As shown in fig. 1, the fixture further includes a limiting member 3, the accommodating groove 11 penetrates along the length direction of the rod body 100 to be processed and forms a through hole 113, any through hole 113 is plugged by the limiting member 3, and one end of the rod body 100 to be processed is abutted against the limiting member 3. The fixture realizes the accurate positioning of the rod body 100 to be processed by arranging the limiting piece 3, and meanwhile, the limiting piece 3 can limit the rod body 100 to be processed to move in the length direction, so that the milling accuracy of a cutter is prevented from being influenced by the relative displacement of the rod body 100 to be processed and the mounting seat 1 in the processing process, and the milling accuracy of the rod body 100 to be processed is ensured.

Specifically, as shown in fig. 1, the fixture further includes a second fixing member 5, and the second fixing member 5 fixes the limiting member 3 to the mounting base 1. The second fixing piece 5 is a screw, and the screw connection is stable and the disassembly and the assembly are convenient. Of course, other structures such as pins, snaps, etc. that perform the securing function are within the scope of the disclosed embodiments.

In addition, as shown in fig. 2, after the rod body 100 to be processed is clamped by the clamp, in order to avoid the clamp running during the processing, the clamp needs to be fixed by a flat pliers or other tools and then milled, and meanwhile, the clamp needs to be guaranteed to be placed horizontally and then milled, so that levelness measurement needs to be performed on the fixed clamp. To solve this problem, as shown in fig. 2, the mounting base 1 further includes a sidewall surface 13, where the sidewall surface 13 is perpendicular to the bottom surface 112. Specifically, the flat tongs will fix two side wall surfaces 13, and then the bottom surface 112 is used for levelness measurement, so that the side wall surfaces 13 are perpendicular to the bottom surface 112, and the horizontal correction of the clamp by an operator is more convenient, thereby ensuring the milling precision.

As shown in fig. 2, the mounting seat 1 further includes an upper end surface 12 and a first convex cambered surface 14, the upper end surface 12 is located above the first pressing surface 111, and the upper end surface 12 is in transitional connection with the first pressing surface 111 through the first convex cambered surface 14. The first convex cambered surface 14 can ensure that the mounting seat 1 cannot scratch the rod body 100 to be processed.

As shown in fig. 3, the pressing member 2 further includes an upper surface 22 and a second outer convex arc surface 24, the upper surface 22 is located above the second pressing surface 21, and the upper surface 22 is in transitional connection with the second pressing surface 21 through the second outer convex arc surface 24. The second outward convex cambered surface 24 can ensure that the pressing piece 2 cannot scratch the rod body 100 to be processed, and the first outward convex cambered surface 14 and the second outward convex cambered surface 24 can ensure that the clamp cannot damage the rod body 100 to be processed during clamping.

As shown in fig. 4, the first pressing surface 111 forms a first angle α with the bottom surface 112 ₁ The second pressing surface 21 forms a second angle alpha with the bottom surface 112 ₂ First included angle alpha ₁ With a second included angle alpha ₂ Equal. During the clamping process, the first pressing surface 111, the second pressing surface 21 and the bottom surface 112 jointly clamp the rod body 100 to be processed, thereby forming a first included angle α ₁ With a second included angle alpha ₂ Equality can ensure that the contact point of the first abutting surface 111 and the rod body 100 to be processed and the contact point of the second abutting surface 21 and the rod body 100 to be processed are on the same horizontal plane, thereby ensuring that the clamp clamps the rod body 100 to be processed firmly, and ensuring that the rod body 100 to be processed can not run in the accommodating groove 11 in the milling process。

Furthermore, if the first angle alpha is at the time of clamping ₁ With a second included angle alpha ₂ If the angle of the first pressing surface 111 is too large, the contact point of the first pressing surface 111 and the rod body 100 to be processed will be close to the first outer convex cambered surface 14, the contact point of the second pressing surface 21 and the rod body 100 to be processed will be close to the second outer convex cambered surface 24, and the positions of the first outer convex cambered surface 14 and the second outer convex cambered surface 24 are easy to be damaged after multiple clamping due to lower structural strength of the first outer convex cambered surface 14 and the second outer convex cambered surface 24; if a first included angle alpha ₁ With a second included angle alpha ₂ If the angle of the first pressing surface 111 is too small, the contact point between the first pressing surface 111 and the rod 100 to be processed will be close to the bottom surface 112, the contact point between the second pressing surface 21 and the rod 100 to be processed will be close to the lower surface 23 of the pressing member 2, the processing space for accommodating the tool will be small, and the fixture and the tool will be involved easily during the processing, so as to affect the milling effect.

To solve the above problem, as shown in FIG. 4, a first angle alpha ₁ With a second included angle alpha ₂ All are 60-65 degrees. A first included angle alpha of 60-65 DEG ₁ With a second included angle alpha ₂ It is possible to ensure that the contact point of the first pressing surface 111 and the rod body 100 to be processed and the contact point of the second pressing surface 21 and the rod body 100 to be processed are at proper positions, avoid interference between the fixture and the cutter, ensure milling effect and prolong the service life of the fixture.

Further, as shown in fig. 4, the bar body 100 to be machined is machined by a cutter to form a machined surface 110, and the machined surface 110 is higher than the upper end surface 12 and the upper surface 22. The arrangement ensures that the fixture reserves enough machining space for the tool, and ensures that the tool does not interfere with the fixture in the whole milling process, thereby ensuring that the tool can form an uninterrupted longer milling plane on the rod body 100 to be processed.

In addition, there may be dimensional errors in the rod 100 to be machined, which may result in the hold-down member 2 having been in contact with the bottom surface 112 when the diameter of the rod 100 to be machined is small, but the rod 100 to be machined is still not clamped. To solve this problem, as shown in fig. 4, the pressing member 2 further includes a lower surface 23, and when the first pressing surface 111, the second pressing surface 21, and the bottom surface 112 hold the rod body 100 to be processed together, the lower surface 23 and the bottom surface 112 are provided with a gap Δt. The reserved gap deltat can ensure that the pressing piece 2 can still clamp and fix the rod body 100 to be processed under the condition of error.

Specifically, the gap Δt is 0.2mm to 2mm. The deltat of 0.2 mm-2 mm can ensure the clamping effect of the pressing piece 2 on the rod body to be processed 100 and can relax the processing and manufacturing precision requirements of the clamp, thereby reducing the manufacturing cost of the clamp on the basis of ensuring the clamping effect of the clamp.

The working process of the clamp is described below with reference to fig. 1:

firstly, fixing the limiting piece 3 and the mounting seat 1 by using the second fixing piece 5;

then, the first fixing piece 4 is used for connecting the pressing piece 2 with the mounting seat 1, and enough space is reserved for being filled into the rod body 100 to be processed, and the pressing piece 2 is not mounted in place at the moment, so that the mounting seat 1 and the pressing piece 2 are only ensured not to be separated;

secondly, placing two rod bodies 100 to be processed into the accommodating groove 11, and enabling the rod bodies 100 to be processed to be in abutting connection with the limiting piece 3;

finally, the pressing member 2 is fixed to the mounting base 1 by the first fixing member 4, and at this time, the rod 100 to be processed is clamped by the first pressing surface 111, the second pressing surface 21, and the bottom surface 112.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The anchor clamps, its characterized in that includes:

the mounting seat (1), a containing groove (11) is formed in the mounting seat (1), and the containing groove (11) comprises a first pressing surface (111);

the pressing piece (2), the pressing piece (2) and the rod body (100) to be processed are arranged in the accommodating groove (11), the pressing piece (2) and the first pressing surfaces (111) are arranged at intervals along the radial direction of the rod body (100) to be processed so as to form a processing space for accommodating a cutter, the pressing piece (2) comprises a second pressing surface (21), and the first pressing surfaces (111) and the second pressing surfaces (21) are obliquely arranged and are mutually far away from each other from the opening of the accommodating groove (11) to the bottom surface (112) of the accommodating groove (11); and

the first fixing piece (4) is used for fixing the pressing piece (2) and the mounting seat (1), so that the first pressing surface (111), the second pressing surface (21) and the bottom surface (112) jointly clamp the rod body (100) to be processed.

2. The fixture according to claim 1, wherein the number of the second pressing surfaces (21) is two, the accommodating groove (11) is provided with a central line L extending along the length direction of the rod body (100) to be processed, the two second pressing surfaces (21) are symmetrically arranged at two sides of the central line L, and each second pressing surface (21), the corresponding first pressing surface (111) and the bottom surface (112) are matched to clamp one rod body (100) to be processed.

3. The clamp according to claim 1, characterized in that the first abutment surface (111) forms a first angle α with the bottom surface (112) ₁ The second pressing surface (21) and the bottom surface (112) form a second included angle alpha ₂ The first included angle alpha ₁ With the second included angle alpha ₂ Equal.

4. A clamp according to claim 3, wherein the first included angle α ₁ And the second included angle alpha ₂ All are 60-65 degrees.

5. The clamp according to claim 1, characterized in that the number of the pressing members (2) is one, the pressing members (2) extending in the length direction of the rod body (100) to be processed; or (b)

The number of the pressing pieces (2) is at least two, and at least two pressing pieces (2) are arranged at intervals along the length direction of the rod body (100) to be processed.

6. The fixture according to any one of claims 1 to 5, further comprising a limiting member (3), wherein the accommodating groove (11) penetrates along the length direction of the rod body (100) to be processed and forms a through hole (113), any one of the through holes (113) is plugged by the limiting member (3), and one end of the rod body (100) to be processed is abutted against the limiting member (3).

7. The clamp according to any one of claims 1 to 5, wherein the mount (1) further comprises:

the upper end face (12) and the first outward protruding cambered surface (14), the upper end face (12) is located on the first pressing surface (111), and the upper end face (12) is in transitional connection with the first pressing surface (111) through the first outward protruding cambered surface (14).

8. The clamp according to claim 7, characterized in that the hold-down element (2) further comprises:

the upper surface (22) and the second outer convex cambered surface (24), the upper surface (22) is located above the second pressing surface (21), and the upper surface (22) is in transitional connection with the second pressing surface (21) through the second outer convex cambered surface (24).

9. The fixture according to claim 8, characterized in that the rod (100) to be machined is machined by the tool to form a machined surface (110), the machined surface (110) being higher than the upper end surface (12) and the upper surface (22).

10. The clamp according to any one of claims 1 to 5, characterized in that the pressing member (2) further comprises a lower surface (23), the lower surface (23) and the bottom surface (112) being provided with a gap Δt when the first pressing surface (111), the second pressing surface (21) and the bottom surface (112) jointly clamp the rod body (100) to be processed.