CN104400466A

CN104400466A - Workpiece machining self-locking clamping device

Info

Publication number: CN104400466A
Application number: CN201410704173.1A
Authority: CN
Inventors: 龙玉玲
Original assignee: CHONGQING SIKAIDI BUSH Co Ltd
Current assignee: CHONGQING SIKAIDI BUSH Co Ltd
Priority date: 2014-11-30
Filing date: 2014-11-30
Publication date: 2015-03-11

Abstract

The invention discloses a workpiece machining self-locking clamping device. The workpiece machining self-locking clamping device comprises a clamp body and a rotary handle and is characterized by comprising a bush, a shaft, a rack, a bush and a nut; the rotary handle, a circular conical surface section, a gear section, a bush section and a screw are sequentially connected to the shaft from the right end to the left end; the circular conical surface section on the shaft is matched with a circular conical surface inside the bush on the clamp body; a bevel gear section is engaged with the rack; the bush section is matched with the internal bush; a circular conical surface of the internal bush is matched with the bush on the clamp body; the shaft is finally fixed on the clamp body through the nut; angles of the two circular conical surfaces are same and alpha is smaller than or equal to 5 degrees; accordingly self-locking is achieved, and the positioning reference and the machining accuracy of workpieces are not influenced when the cutting force is large.

Description

Work pieces process self clamping device

Technical field

The present invention relates to a kind of for work pieces process clamping device, especially with the work pieces process self clamping device that cutting output is large.

Background technology

Along with industrial development, part processing is more and more, and be all Workpiece fixing will be stepped up at numerous processing modes, the size of Workpiece clamping power directly affects the positioning precision of workpiece, common clamp system can not come the position of the changing clamp point of application according to the actual size of workpiece, thus when cutting force is larger, then can affect the positioning datum of workpiece, and cause process effect and precision not high.

Summary of the invention

The object of the invention is to add man-hour because cutting force is larger for overcoming existing part, the location of workpiece is caused to be moved, affect processing effect and machining accuracy, and provide a kind of can the clamping of self-locking, ensure that in process, larger cutting force can not affect the positioning precision of part.

In order to achieve the above object, technical scheme of the present invention is: work pieces process self clamping device, comprise clamp body, turning handle, it is characterized in that: comprise lining, axle, tooth bar, lining, nut, axle is connection of rotating handle section successively from right-hand member to left end, taper seat section, gear segment, liner section, it is finally screw rod, axle is coordinated with lining internal conical surface by taper seat section on clamp body, helical gear section engages with tooth bar, recycle the taper seat of neck bush after liner section coordinates with neck bush to coordinate with the lining on clamp body, the taper seat finally by nut neck bush being pressed on lining is also pressed on taper seat on lining simultaneously, angle [alpha]≤5 ° of taper seat section.

In technique scheme, because the two-end structure of axle is similar, make the uniform force on axle, taper seat angle [alpha]≤5 °, cause direction stressed on tooth bar to be positioned at the stressed Self-locking angle of taper seat, reach self-locking, adopt gear drive, can effective clamping work pieces.

Improvement on such scheme is 3 times that the length of turning handle are accomplished maximum gauge on axle, effectively can be reduced labor intensity by principle of moments, is reduced in the power of shake turning handle.

Further improvement in such scheme is meshed gears is helical gear, the helical gear gear teeth, little by little enter engagement, little by little depart from engagement, stable drive, is very applicable to heavy load transmission, the error of spur gear owing to manufacturing, the instantaneous velocity of straight-tooth transmission is change, mainly can produce the uneven change of speed because foozle causes in the gear teeth engaging-in moment of nibbling out.

In such scheme, in order to ensure that axle can be clamped completely, prevent fastening nut from being that neck bush can not be limited to fix completely, when causing the turning handle when clamping work pieces, neck bush skids, the stressed problem such as asymmetric in two ends.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:

Fig. 1 is the overall plan figure of a kind of work pieces process self clamping device of the present invention;

Fig. 2 be Fig. 1 work pieces process self clamping device A to direction view;

Mark in above-mentioned figure is: clamp body 1, helical rack 2, lining 3, turning handle 4, axle 5, taper seat section 6, helical gear section 7, lining 8, neck bush 9, nut 10, screw rod 11, liner section 12.

Detailed description of the invention

Embodiments of the present invention as depicted in figs. 1 and 2, comprise clamp body 1, helical rack 2, lining 3, turning handle 4, axle 5, lining 8, neck bush 9, nut 10.Axle 5 is connection of rotating handle 4, taper seat section 6, helical gear section 7 successively from right-hand member to left end, has keyway section 12, is finally screw rod 11.

Axle 5 is coordinated with lining 3 internal conical surface by taper seat section 6 on clamp body 1, helical gear section 7 engages with helical rack 2, recycle the taper seat of neck bush 9 and coordinate with the lining 8 on clamp body after liner section 12 is connected with neck bush 9 key, also taper seat 6 is pressed on lining 3 while of on the taper seat finally by nut 10 neck bush 9 being pressed on lining 8.When rotating counterclockwise handle 4, band moving axis 5 rotates, and the helical gear 7 on axle engages with helical rack 2, helical rack 2 moves up and down, briquetting on the threaded rod of tooth bar lower end moves downward, clamping work pieces, when workpiece adds man-hour being cut, because transmission is by helical gear, so there is not gap, the simultaneously taper seat cone angle that coordinates with end cap of the taper seat of axle 5 right-hand member, and the scope of α is at 0 ~ 5 °, mechanism's self-locking, the clamping device of self-locking can bear larger cutting force like this.

Workpiece is placed on clamp body, with work pieces process self clamping device, labor cost is being clamped, rotate turning handle 4, axle 5 rotates thereupon, key on liner section 12 drives neck bush 9 to rotate, thus the two ends stress equalization of helical gear section 7 on axle 5, helical rack section 7 in rotation process by engaging with helical rack 2, realize moving up and down of helical rack 2, realize Workpiece clamping eventually through the briquetting on the thread segment of helical rack 2 lower end.

In clamping process, the length due to turning handle 4 accomplishes 3 times of maximum gauge on axle 5, increasing moment, reducing labour intensity by increasing distance.

Clamping transmission mainly carrys out transmission by helical gear, avoids the gap of two between cog in Spur Gear Driving, decreases the impact in transmission process.

After clamping during machining, because the two-end structure of axle 5 is similar, make the uniform force on axle 5, taper seat angle [alpha]≤5 °, cause direction stressed on tooth bar to be positioned at the stressed Self-locking angle of taper seat, reach self-locking cutting force very little on the impact of workpiece.

Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; without departing from the inventive concept of the premise; some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.

Claims

1. work pieces process self clamping device, comprise clamp body (1), turning handle (4), it is characterized in that: comprise lining (3), axle (5), tooth bar (2), lining (9), nut (10), axle (5) is connection of rotating handle section (4) successively from right-hand member to left end, taper seat section (6), gear segment (7), liner section (12), finally screw rod (11), axle (5) is coordinated with lining (3) internal conical surface by the upper taper seat section (6) of clamp body (1), helical gear (7) section engages with tooth bar (2), liner section (12) recycles the taper seat of neck bush (9) and coordinates with the lining (8) on clamp body after coordinating with neck bush (9), finally by nut (10), axle (5) is fixed on clamp body (1), identical and α≤5 ° of the angle of two taper seats.

2. work pieces process self clamping device as claimed in claim 1, is characterized in that: described turning handle (4) length is more than 3 times of the upper maximum gauge of axle (5).

3. work pieces process self clamping device as claimed in claim 1, is characterized in that: described gear segment (7) and tooth bar (2) are all helical teeth.

4. work pieces process self clamping device as claimed in claim 1, is characterized in that: liner section (12) is that key is connected with lining (9).