SU1747249A1 - Vice - Google Patents

Abstract

The invention relates to devices for clamping workpieces and improves productivity. The vice contains a body with a fixed sponge 1, a movable sponge 2 installed in its guides, a screw 3 with left and right threads, interacting with nuts 4 and 5, a worm and a worm sector with a spline sleeve and a torque limit clutch. On the shank of the screw 3 there is installed a sleeve 10 with slots interacting with the slots of the hub of the worm sector, spring loaded 13, To fix the clutch of the slits of the worm sector and the hub 10, there is a ring-lock 14. 2 Cp f-ly, 3 ill.

Description

fig i

The invention relates to mechanical engineering, in particular to devices for clamping workpieces.

The floating law is known, which includes a housing with floating lips, a working screw with left and right threads, a drive coupling installed on the thread of the free end of the screw, a sleeve installed between the outer end of the drive coupling, one of the lips, and an emphasis that interacts with the inner end of the coupling.

The disadvantages of this device are low productivity due to insufficient speed, a small and unregulated clamping force on the part.

A self-centering clamping device is known, comprising a base, a housing fixed thereto, two sliders located in the housing, two jaws fixed on sliders, two coaxial screws with right and left threads that engage with sliders and with stops at the outer ends, threaded a sleeve mounted on the inner ends of the screws; a power drive; additional jaws mounted with an angular displacement.

The disadvantages of this device are low speed, unregulated clamping force.

The closest in technical essence are self-centering vise containing jaws that are moved along the body guides by means of nuts having additional guides, and a detachable screw having right and left threads.

The disadvantages of this device are insufficient productivity, a small and unregulated clamping force.

The purpose of the invention is to increase labor productivity and reduce the effort on the handle.

The goal is achieved by the fact that the screw is made with a cylindrical shaft coaxially with a thread and with non-braking threads, and the vice is provided with a screw with a handle mounted on a movable sponge, a worm sector with a spline sleeve mounted on a cylindrical shaft of the screw with the possibility of a screw, a spring-loaded bushing with a handle at one end and slots at the other end mounted on the screw shank with the possibility of axial movement relative to the screw and their slots interacting with the slots w streets of the worm sector, fixed from turning relative to the screw, and

ring-lock installed on the hub of the worm sector with the possibility of interaction with the spring-loaded hub. In addition, the vise is equipped with a clutch.

of the torque limit set on the handle of the screw with the possibility of interaction with the screw, and the threads of the screw and nuts are multi-threaded.

A vice with sponges is known that is moved along the body guides by means of nuts and a detachable screw having right and left threads. The right and left threads of the screw provide accelerated convergence of the jaws, which slightly increases

5 performance. But for reliable clamping of the part, it is necessary to additionally apply a considerable force to the screw handle, which negatively affects the performance, since either

0 lengthen the handle, or act in another way. In addition, due to the inaccuracy of the applied efforts, the deformation of the part is possible.

A comparative analysis with this technical solution, the prototype, shows that the claimed vice is characterized by the fact that they use screws and nuts with multiple non-self-braking threads and cylindrical coaxially threaded threads.

0 with a shank, one nut fastened in the housing, and the other in a movable sponge and together with the screw they move reciprocally relative to each other; spring loaded sleeve with handle

5 at one end and slots at the other end, mounted on the shank of the screw with the possibility of axial movement relative to the screw and interacting with its slots with the slots of the worm sleeve

0 sector and fixed from turning relative to the screw, and a ring-clamp mounted on the hub of the worm sector with the possibility of interaction with the spring-loaded hub; worm sector with

5 sleeve with slots, mounted on a cylindrical shank of the screw with the ability to interact with a screw: a screw with a handle, mounted on a movable sponge together with a nut, as well as a coupling

0 of the torque limit, actuating the power mechanism and mounted on the axis of the screw of the power mechanism.

Screw and nuts with multi-directional thread are known. In known solutions

5, the nuts are fixed (integral) on the movable jaws, or one nut is used, fixed in the housing or in the movable jaw. The screw is fastened either by both ends in the housing, or by one of them in a movable sponge or housing. In accordance with the invention, the nuts are fastened — one in the housing, the other in the movable jaw, and the screw rotates in both of them and is not fastened. At the same time, due to the multidirectional thread, the effect of speed is achieved as in the prototype, i.e. different from the known solutions, in which the movable sponge is detached from the screw and advanced manually along the guides, but also different from the prototype, since the displacement of the movable sponge is carried out both by axial movement of the nut fixed in it and by axial movement the screw itself in the housing nut. In addition, the outer end of the screw is made in the form of a cylindrical shank coaxially with the thread, i.e. the screw performs a new function — it serves as an axis for the worm-sector bush and a guide for using the vice.

The switch of use mode, which is a sleeve with a vice handle fixed in it, mounted on a cylindrical shank of the screw with the possibility of axial movement, fixed from turning, spring-loaded to prevent self-engagement with the sleeve of the worm sector, and having slots at the end is new for the vice. a distinctive feature that significantly distinguishes it from known solutions. The force mechanism in the form of a worm gearbox is known, but in this case it performs a new function — it prevents, with a simultaneous significant increase in clamping force, the rotation of a screw with non-braking thread.

To improve the accuracy of the relative positioning of the movable and fixed jaws, the distance between the points of the supports of the movable jaw to the body of the vice is adjusted during the work on the vise. A support ring is selected as one of the support points; it is located at the junction of the cylindrical movable jaw guide with the housing. As the second support, the guide rails of the base plate rigidly connected to the base of the movable jaw are selected. The installation of guides is made on the base plate by adjusting the wedge bars.

In a vice, the complete tightness of the working area of the rubbing pairs (screw-bushing) and the worm gear pair is ensured. Tightness is achieved through the use of stuffing boxes, reflectors and gaskets at the installation sites of the hatches.

FIG. 1 shows a vice, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. one.

The vice contains a body with a fixed 5 sponge 1, a movable sponge 2 installed in its guides, a screw 3 of a displacement mechanism mounted in nuts 4 and 5, with the nut 4 fixed in the housing 1. and a nut 5 in the movable sponge 2, the power mechanism b, consisting of a worm 7 and a screw-hole sector 8 with a slotted hub and having a wrench 9 of the torque limit on the axis, the Force Mechanism 6 is fixed on the moving jaw 2 together with

5 by a nut 5. On the cylindrical shank of the screw 3 which is coaxial with the thread, there is a mechanism for switching the operating mode of the vice consisting of a sleeve 10 that moves freely along the axis of the screw 3 and is secured against turning by a bolt 11. At the free end of the sleeve there is a rod-handle 12 dl rotation of the screw 3. The sleeve 10 has splines on the inner end and is spring-loaded to prevent

5 self-engagement with the splines of the screw-shaped sector 8 by the spring 13. In the groove of the splines of the sleeve and the sector there is a split-ring-lock 14, which ensures reliable adhesion of the splines. In the inner part of the cylindrical cavity of the housing 1, a support ring 15 is installed, which serves as a support for the cylindrical guide jaw 2, which is supported in the front part by means of the support plate 16

5 to guide rails 17, adjustable by means of wedge-shaped rails 18.

The device works as follows.

During installation of the part, the vise operates in the speed mode when the sleeve 10 is held by the spring 13 from engagement with the splines of the worm sector 8. Rotate the screw 3 using the handle 12 and sets the moving sponge 2 in motion.

5 In this case, the screw 3 is screwed into the nut 4 and simultaneously turned out of the nut 5, causing it to move along the axis of the screw towards the nut 4, and since the nut 5 is fixed in the movable jaw 2, the latter also

0 moves towards the sponge of the housing 1. Due to this interaction of the screw and nuts, the speed of convergence (dilution) of the sponges is doubled, and due to the use of, for example, a three-thread, another three

5 times. Having pressed the part, the vice is put in the clamping mode. To do this, by pressing the outer end of the sleeve 10 and compressing the spring 13, its splines are engaged with the splines of the worm sector 8. The engagement is fixed by a ring-latch 14. Then the handle

through the clutch 9 of the limiting moment, rotating the screw to 7, rotate the sector 8, the force from which through the sleeve 10 is transmitted to the screw 3 and the movable sponge 2. Due to the worm gear, the force applied to the handle increases several times and the part is securely clamped in the lips without any extra human effort.

To prevent damage (breakage) of the part when the required clamping forces are exceeded, the clutch 9 of the torque limit is triggered. In order to remove the movable jaw 2 from the product, the actions are repeated in reverse order.

With the presence of multidirectional threads in the prototype and the proposed device, the latter has great performance due to the increase in speed and saving time for clamping the product. In addition, the clamping of the part does not require significant efforts, which significantly improves the working conditions.

Claims (3)

1. A vice containing a body with guides and a fixed sponge, a movable sponge mounted on the guiding bodies, two nuts with left and right threads, one of which is installed in the body, and the other on the movable sponge, a screw with left and right thread associated with nuts, characterized in that. that, in order to increase labor productivity and reduce effort on the handle, the screw is made with non-self-braking threads and a cylindrical shaft aligned with the thread, and the vice is provided with a screw with a handle mounted on a movable jaw, a worm sector with a sleeve with slots, mounted on a cylindrical shank of the screw with the ability to interact with a screw, spring-loaded sleeve with a handle at one end and slots at the other end mounted on the shank screws with the possibility of axial movement relative to the screw and interacting with their slots with the splines of the hub of the worm sector and fixed against turning with the screw, and a lock ring mounted on the hub of the worm sector with the possibility of interaction with the spring-loaded hub. 2. Clamp under item 1, characterized in that the threads of the screw and nuts are made multiple. 3. Clamp on PP. 1 and 2, characterized in that they are equipped with a torque limit clutch mounted on the screw of the screw with the ability to interact with worm com. Type A FIG% eleven eight FIG. 3 6-5 76 77 ra /