阅读说明：本技术 一种兼容不同高度工件的夹紧装置 (Clamping device compatible with workpieces with different heights ) 是由 杨更新 于 2020-12-08 设计创作，主要内容包括：本发明提供了一种兼容不同高度工件的夹紧装置,包括导轨、上夹爪和下夹爪,所述上夹爪和所述下夹爪均安装在所述导轨上,所述上夹爪和所述下夹爪均具有同轴开口,所述同轴开口内穿插有丝杠,所述丝杠的底端连接有驱动装置,驱动装置驱动丝杠旋转进而带动上下夹爪在导轨上移动,实现工件的加工动作。本发明能够兼容不同高度、不同厚度的工件夹紧,不需要调整机构二次调节夹具的位置,实现自动夹紧,还可根据工艺调节夹紧力,结构简单,成本低廉。(The invention provides a clamping device compatible with workpieces with different heights, which comprises a guide rail, an upper clamping jaw and a lower clamping jaw, wherein the upper clamping jaw and the lower clamping jaw are both arranged on the guide rail, the upper clamping jaw and the lower clamping jaw are respectively provided with a coaxial opening, a lead screw is inserted into the coaxial openings, the bottom end of the lead screw is connected with a driving device, and the driving device drives the lead screw to rotate so as to drive the upper clamping jaw and the lower clamping jaw to move on the guide rail, so that the processing action of the workpieces is realized. The clamping device can be compatible with clamping of workpieces with different heights and thicknesses, does not need to adjust the position of the clamp for the second time by an adjusting mechanism, realizes automatic clamping, can adjust the clamping force according to the process, and has the advantages of simple structure and low cost.)

1. The utility model provides a clamping device of compatible not co-altitude work piece, its characterized in that includes the guide rail, goes up clamping jaw and lower clamping jaw, go up the clamping jaw with lower clamping jaw is all installed on the guide rail, go up the clamping jaw with lower clamping jaw all has coaxial opening, the lead screw has been alternate in the coaxial opening, the bottom of lead screw is connected with drive arrangement.

2. The clamping device for workpieces with different heights according to claim 1, wherein a guide rail sliding block is arranged on the guide rail, the upper clamping jaw or the lower clamping jaw is respectively installed on the guide rail through the guide rail sliding block, an upper limiting device is arranged at the top end of the guide rail, and a lower limiting device is arranged at the bottom end of the guide rail.

3. The clamping device for workpieces with different heights according to claim 1, wherein the upper clamping jaw and the lower clamping jaw are hollow closed boxes, and the bottom surface of the upper clamping jaw and the top surface of the lower clamping jaw are both made of hard material plates.

4. The clamping device for workpieces with different heights according to claim 1, wherein a lead screw nut is installed in a bottom opening or a top opening of the upper clamping jaw and used for driving the upper clamping jaw to move.

5. The clamping device for workpieces with different heights according to claim 4, wherein the top surface and the bottom surface of the lower clamping jaw are provided with openings, a first bearing is installed in the opening of the top surface of the lower clamping jaw, a second bearing is installed in the opening of the bottom surface of the lower clamping jaw, and the inner ring of the first bearing or the inner ring of the second bearing is connected with the outer wall of the lead screw.

6. The clamping device for workpieces with different heights according to claim 5, wherein the screw comprises a screw portion and a connecting portion, the screw portion passes through the top openings of the screw nut and the upper clamping jaw and is used for the screw nut to drive the upper clamping jaw to move, the connecting portion is inserted into the first bearing and the second bearing, and the bottom end of the connecting portion is connected with the driving device.

7. The clamping device for workpieces with different heights as set forth in claim 5, wherein the first bearing and the second bearing are tapered roller bearings.

8. The clamping device for workpieces with different heights as claimed in claim 6, wherein the driving device comprises a servo motor and a speed reducer, and the servo motor is connected with the bottom end of the lead screw through the speed reducer.

9. The clamping device for workpieces with different heights according to claim 5, wherein a connecting cover is installed in the opening on the top surface of the lower clamping jaw and used for connecting the lower clamping jaw with the lead screw, and an inner flange is arranged on the opening on the bottom surface of the lower clamping jaw and used for supporting the second bearing.

10. A clamping device compatible with workpieces with different heights as claimed in claim 9, wherein the bottom surface of the lower clamping jaw is connected with the driving device.

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to a clamping device compatible with workpieces with different heights.

Background

The clamping device is widely applied in the mechanical industry, the two clamping jaws of the common clamping device move oppositely and symmetrically and synchronously at present, but the clamping device cannot be compatible with clamping of workpieces with different heights and different thicknesses under the condition that the clamping device is fixed, and if the compatible clamping is to be realized, the common technical means at present comprise the following steps: 1. the clamping jaw is provided with a position adjusting structure, if the heights of workpieces are different, the position of the clamping jaw is adjusted through the position adjusting structure, the clamping of the workpieces with different heights is compatible, but the general function is single, and the automation characteristic is not achieved. 2. The two clamping jaws are provided with independent driving devices, and the clamping of workpieces with different heights and different thicknesses is realized by respectively controlling the movement of the two clamping jaws, but each clamping jaw of the clamp is provided with a driving device, so that the problems of high energy consumption, high cost, low efficiency and the like are caused. 3. The clamping device has the advantages that the clamping devices are arranged on different heights to clamp workpieces with different heights and different thicknesses, the clamp is complex to use, the cost is high, and the clamp is difficult to adapt to modern requirements.

Disclosure of Invention

The invention aims to provide a clamping device compatible with workpieces with different heights, which can be freely adjusted through a slide rail and a lead screw clamping jaw and can clamp the workpieces with different heights and different thicknesses through a driving device.

The invention provides a clamping device compatible with workpieces with different heights, which comprises a guide rail, an upper clamping jaw and a lower clamping jaw, wherein the upper clamping jaw and the lower clamping jaw are both arranged on the guide rail, the upper clamping jaw and the lower clamping jaw are provided with coaxial openings, a lead screw is inserted into the coaxial openings, and the bottom end of the lead screw is connected with a driving device. The guide rail is used for allowing the upper clamping jaw and the lower clamping jaw to move on the guide rail and providing support for the upper clamping jaw and the lower clamping jaw, the lead screw is used for controlling the movement of the upper clamping jaw and the lower clamping jaw, the inner diameter of an opening in the upper clamping jaw and the lower clamping jaw is smaller than the outer diameter of the lead screw, and the driving device is used as a rotating power source of the lead screw.

Furthermore, a guide rail sliding block is arranged on the guide rail, the upper clamping jaw or the lower clamping jaw is installed on the guide rail through the guide rail sliding block respectively, an upper limiting device is arranged at the top end of the guide rail, and a lower limiting device is arranged at the bottom end of the guide rail. The sliding block is used as a middle connecting piece between the upper clamping jaw and the lower clamping jaw and the screw rod to help the upper clamping jaw and the lower clamping jaw to slide on the sliding block, the upper limiting device does not allow the upper clamping jaw to be separated from the guide rail, the lower limiting device does not allow the lower clamping jaw to be separated from the guide rail, and the upper limiting device and the lower limiting device are specifically an upper limiting block and a lower limiting block.

Furthermore, the upper clamping jaw and the lower clamping jaw are hollow closed boxes, and the bottom surface of the upper clamping jaw and the top surface of the lower clamping jaw are both hard material plates. Hard material can not damage the bending when the clamping jaw presss from both sides tight work piece, and the clamp force is stronger.

Furthermore, a screw nut is installed in the bottom opening or the top opening of the upper clamping jaw and used for driving the upper clamping jaw to move. The up-and-down movement of the screw nut on the screw can drive the upper clamping jaw to move synchronously on the screw.

Further, the top surface and the bottom surface of lower clamping jaw all have the opening, install first bearing in the top surface opening of lower clamping jaw, install the second bearing in the bottom surface opening of lower clamping jaw, first bearing or the inner ring of second bearing all with lead screw outer wall connection. The bearing is used as the radial support of the screw rod, and the inner ring rotates along with the screw rod.

Further, the lead screw includes screw rod portion and connecting portion, screw rod portion passes lead screw nut with go up the open-top of clamping jaw, be used for lead screw nut drives it removes to go up the clamping jaw, connecting portion insert first bearing and affiliated second bearing, the bottom of connecting portion with drive arrangement connects. The screw rod portion is located the top of clamping jaw down, and when going up the clamping jaw and moving to the lowest position, lead screw nut is in the bottommost on the screw rod portion promptly, and connecting portion can need not have the screw thread, and only rotate as the pivot can.

Further, the first bearing and the second bearing are tapered roller bearings. In this clamping device, it is necessary to support the screw in the radial direction, and a large axial force, such as the weight of the workpiece, is generated during the clamping process, so that a tapered roller bearing is preferably used.

Further, drive arrangement includes servo motor and reduction gear, servo motor through the reduction gear with the bottom of lead screw is connected. The clamping process is a slow process, and the rotation amount of the servo motor can be controlled more easily by using the speed reducer.

Further, install the connection lid in the top surface opening of lower clamping jaw, the connection lid be used for connecting lower clamping jaw with the lead screw, be equipped with inboard flange on the bottom surface opening of lower clamping jaw, inboard flange is used for supporting the second bearing. The second bearing can be directly put into from the top surface opening of lower clamping jaw, on the inboard flange of below, makes the second bearing not fall out from the bottom surface opening, and first bearing can rely on lead screw connecting portion's shoulder to support, connects lid and first bearing cooperation, with the connecting portion fixed connection of lower clamping jaw and lead screw, for clamping action provides axial support, in order to be stable in the use, connects the lid and still fixes first bearing pressure fastening.

Further, the bottom surface of the lower clamping jaw is connected with the driving device. The driving device can move axially along with the lower clamping jaw.

According to the technical scheme, the upper clamping jaw and the lower clamping jaw of the clamp can automatically adjust the height by adopting the matching of the sliding rail and the lead screw, the clamping of workpieces with different heights and different thicknesses is compatible, the position of the clamp does not need to be adjusted by an adjusting mechanism for the second time, the automatic clamping is realized, the servo motor and the reducer are matched to provide power, the labor is saved, the clamping force can be automatically adjusted by controlling the servo motor according to the process, the structure is simple, and the cost is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of FIG. 4 at C in accordance with the present invention;

FIG. 6 is an enlarged view of FIG. 4 taken at D of the present invention;

FIG. 7 is an enlarged view of FIG. 4 at E in the present invention;

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 3 according to the present invention;

description of reference numerals:

the device comprises a guide rail 1, a guide rail sliding block 101, an upper limiting block 102, a lower limiting block 103, an upper clamping jaw 2, a lower clamping jaw 3, a first bearing 301, a second bearing 302, a connecting cover 303, a lead screw 4, a lead screw nut 401, a screw rod part 402, a connecting part 403 and a driving device 5.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-8:

the invention provides a clamping device compatible with workpieces with different heights, which comprises a guide rail 1, an upper clamping jaw 2 and a lower clamping jaw 3, wherein the upper clamping jaw 2 and the lower clamping jaw 3 are both arranged on the guide rail 1, the upper clamping jaw 2 and the lower clamping jaw 3 are provided with coaxial openings, a screw rod 4 is inserted into the coaxial openings, and the bottom end of the screw rod 4 is connected with a driving device 5. Guide rail 1's effect is the upper and lower clamping jaw of allowwing to move on it, provide support for upper and lower clamping jaw, the effect of lead screw 4 is the removal of clamping jaw about controlling, the opening is circular through-hole, the internal diameter of the opening on the upper and lower clamping jaw is less than lead screw 4's external diameter, drive arrangement 5 is as the rotation power supply of lead screw 4, guide rail 1 is vertical linear type, upper and lower clamping jaw can directly design the slider respectively and install on guide rail 1, or design the slider in addition and regard as intermediate junction spare, fix upper and lower clamping jaw on guide rail 1, upper and lower clamping jaw can be respectively along guide rail 1 and do the free movement of vertical direction, drive arrangement 5's output shaft is connected with lead screw 4's bottom, drive arrangement 5 drives lead screw 4 and rotates.

The guide rail 1 is provided with a guide rail sliding block 101, the upper clamping jaw 2 or the lower clamping jaw 3 is respectively installed on the guide rail 1 through the guide rail sliding block 101, the top end of the guide rail 1 is provided with an upper limiting device, and the bottom end of the guide rail 1 is provided with a lower limiting device. The slider is as the intermediate junction spare of upper and lower clamping jaw and lead screw 4, and the clamping jaw slides on the slider about the help, and when the device did not use, under the action of gravity, lower clamping jaw 3 slided the lowermost end of guide rail 1 through the slider, with lower stop device contact, upper clamping jaw 2 supported through screw-nut 401, upper stop device does not allow upper clamping jaw 2 to break away from guide rail 1, lower stop device does not allow lower clamping jaw 3 to break away from guide rail 1, upper stop device and lower stop device specifically are upper stop block 102 and lower stop block 103.

The upper clamping jaw 2 and the lower clamping jaw 3 are hollow closed boxes, and the bottom surface of the upper clamping jaw 2 and the top surface of the lower clamping jaw 3 are both hard material plates. The hard material plate is preferably a hard metal plate, other materials with enough hardness are all available, the best clamping effect is mainly achieved, of course, materials with enough hardness are also needed for other surfaces, the upper clamping jaw 2 or the lower clamping jaw 3 can be helped not to be damaged and bent when clamping a workpiece, the clamping force is stronger, the clamping effect is better, or the upper clamping jaw 2 or the lower clamping jaw 3 can be directly designed into a metal block, and the opening is designed into a through hole and the like.

A screw nut 401 is arranged in the bottom opening or the top opening of the upper clamping jaw 2, and the screw nut 401 is used for driving the upper clamping jaw 2 to move. The up-and-down movement of the screw nut 401 on the screw 4 can drive the upper clamping jaw 2 to move synchronously on the screw 4. The lead screw nut 401 is fixed on the opening of the upper clamping jaw 2 through a screw, and the lead screw nut 401 can be independently installed in the top opening or the bottom opening, and can also be installed in both openings.

The top surface and the bottom surface of the lower clamping jaw 3 are provided with openings, a first bearing 301 is installed in the opening of the top surface of the lower clamping jaw 3, a second bearing 302 is installed in the opening of the bottom surface of the lower clamping jaw 3, and inner rings of the first bearing 301 or the second bearing 302 are connected with the outer wall of the lead screw 4. The bearing is used as the radial support of the screw rod 4, the inner ring rotates along with the screw rod 4, and the lower clamping jaw 3 is connected with the connecting part 403 of the screw rod 4 through the bearing.

The screw 4 comprises a screw part 402 and a connecting part 403, the screw part 402 passes through the screw nut 401 and the top opening of the upper clamping jaw 2, the screw nut 401 drives the upper clamping jaw 2 to move, the connecting part 403 is inserted into the first bearing 301 and the second bearing 302, and the bottom end of the connecting part 403 is connected with the driving device 5. Screw portion 402 is located the top of lower clamping jaw 3, when going up clamping jaw 2 and moving to the lowest position, lead screw nut 401 is in the bottommost end on screw portion 402 promptly, connecting portion 403 can not have the screw thread, only rotate as the pivot can, when drive arrangement 5 drives lead screw 4 and rotates, lead screw nut 401 of screw portion 402 drives clamping jaw 2 and reciprocates, after last clamping jaw 2 contacts treating the clamp work piece, lead screw nut 401 counteracts on lead screw 4, lead screw 4 reciprocates in lead screw nut 401, last connection lid 303 and the first bearing 301 of lower clamping jaw 3, indirectly fixed lower clamping jaw 3 and lead screw 4 connecting portion 403, follow lead screw 4 and move, reach the work piece clamping position.

The first bearing 301 and the second bearing 302 are tapered roller bearings. In this clamping device, it is necessary to support the screw 4 not only in the radial direction but also in the clamping process to generate a large axial force such as the weight of the workpiece itself, and therefore, it is preferable to use a tapered roller bearing.

The driving device 5 comprises a servo motor and a speed reducer, and the servo motor is connected with the bottom end of the lead screw 4 through the speed reducer. The clamping process is a slow process, and the rotation amount of the servo motor can be controlled more easily by using the speed reducer. The reducer may be a small worm gear reducer, a gear box or the like, which is a common product on the market and the specific description thereof is not described here.

Install in the top surface opening of lower clamping jaw 3 and connect lid 303, it is used for connecting to connect lid 303 lower clamping jaw 3 with lead screw 4, be equipped with inboard flange on the bottom surface opening of lower clamping jaw 3, inboard flange is used for supporting second bearing 302. The second bearing 302 can be directly put into from the top surface opening of the lower clamping jaw 3 to the inner side flange below, so that the second bearing 302 does not fall out from the bottom surface opening, the first bearing 301 can be supported by the shaft shoulder of the connecting part 403 of the lead screw 4, the connecting cover 303 is matched with the first bearing 301, the lower clamping jaw 3 is fixedly connected with the connecting part 403 of the lead screw 4, axial support is provided for clamping action, the position of the clamping jaw is adjusted, and the clamping function compatible with different heights is realized. The connection cover 303 is also press-fixed to the first bearing 301 for stability during use.

The bottom surface of the lower jaw 3 is connected to a drive 5. The bottom surface of the lower clamping jaw 3 is connected with the shell of the speed reducer, the lower clamping jaw 3 is put down to move, the driving device 5 moves along with the lower clamping jaw 3, the operation is simple and convenient, and the driving device 5 can play a role similar to that of the connecting cover 303 to fixedly connect the screw rod 4 with the lower clamping jaw 3.

When the device is used, the upper clamping jaw 2 is fixed with the screw nut 401, the lower clamping jaw 3 is fixed with the screw rod 4, the screw rod 4 is driven by the servo motor through the speed reducer, and the speed reducer is also fixed with the lower clamping jaw 3; the upper clamping jaw and the lower clamping jaw 3 can slide on the linear guide rail 1 (the driving device 5 slides along the upper clamping jaw and the lower clamping jaw 3), under the action of gravity, the driving device 5 and the lower clamping jaw 3 can be in contact with the lower limiting block 103 at the tail end of the linear guide rail 1, when clamping starts, the driving device 5 drives the screw rod 4 to rotate, firstly, under the influence of gravity, the lower clamping jaw 3 does not act, the upper clamping jaw 2 acts, after the upper clamping jaw 2 is in contact with a workpiece, the upper clamping jaw 2 and the screw nut 401 cannot move, the screw rod 4 continues to rotate, the screw rod 4 is reacted by the screw nut 401, the lower clamping jaw 3 is driven by the connecting cover 303 and the like to act again until being in contact with the workpiece, clamping is realized, and.

When the clamping is released, the driving device 5 rotates reversely, the lower clamping jaw 3 acts firstly under the action of gravity to release the workpiece, and after the lower clamping jaw 3 moves to the tail end of the linear guide rail 1 to be contacted with the lower limiting block 103, the upper clamping jaw 2 releases the workpiece, so that the workpiece is released.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.