CN201632816U

CN201632816U - Multi-spiral plate synchronous clamping device

Info

Publication number: CN201632816U
Application number: CN2009202519667U
Authority: CN
Inventors: 孙忠江
Original assignee: Tianjin Lilin Petroleum Machinery Co Ltd
Current assignee: Tianjin Lilin Petroleum Machinery Co Ltd
Priority date: 2009-12-25
Filing date: 2009-12-25
Publication date: 2010-11-17
Anticipated expiration: 2019-12-25

Abstract

The utility model relates to the technical field of processing of petroleum equipment, in particular to a multi-spiral plate synchronous clamping device applied to spiral connection detaching equipment for petroleum screw drill tools and pipes. The multi-spiral plate synchronous clamping device is characterized by comprising an oil cylinder, a rack and a gear. The rack connected with an oil cylinder piston is meshed with the gear on a clamping device to drive a multi-spiral screw inside a jaw driving groove to eccentrically rotate, and to lead a jaw shaft to axially move, thereby realizing synchronous clamping and loosening acts of work pieces. The clamping device consists of a jaw and the multi-spiral screw processing on the axial end face of the gear, a driving groove matched with a gear curve pusher rod in shape is processed on the jaw, and the multi-spiral screw is assembled inside the jaw driving groove. The device realizes motion at the same velocity by adopting one oil cylinder to drive the clamping device, and finally can guarantee realization of synchronization and concentricity of clamped work pieces. The use of one cylinder reduces volume, weight and cost of the device.

Description

Multi-head spiral dish synchronous clamping device

Technical field

The utility model belongs to oil equipment machining technique field, particularly relates to a kind of multi-head spiral dish synchronous clamping device that is applied in oil helicoid hydraulic motor and the tubing spiral connection disassemblerassembler.

Background technology

The helicoid hydraulic motor that generally uses in the oil drilling is to form by threaded connection between each parts, all will use assembling and disassembling stand to operate in the assembly and disassembly process.Clamping device in the at present existing assembling and disassembling stand equipment all is to be equipped with the flexible (see figure 6) that a plurality of oil cylinders are realized claw by a plurality of claws, yet in the real work because the pressure difference of each oil cylinder causes the movement rate difference of each claw, in the cross section after finally crowding around with the equipment decentraction.Particularly in when assembling because the workpiece decentraction that clamps, be difficult to realize smoothly to being threaded of clamping two parts workpiece, and, increased volume, weight and the cost of equipment owing to used a lot of oil cylinders.

The utility model content

The purpose of this utility model aims to provide a kind of multi-head spiral dish synchronous clamping device, it realizes the same rate motion by a plurality of claws that adopt a kind of clamping device, make that to crowd around the cross section concentric with equipment, finally can guarantee smoothly the clamping workpiece is realized reaching synchronously with one heart, and owing to used an oil cylinder, thereby reduced volume, weight and the cost of equipment.

For realizing that the purpose of this utility model adopts following technical scheme: a kind of multi-head spiral dish sychronisation, it is characterized in that, comprise that the multi-head spiral that tooth bar that oil cylinder and oil cylinder piston bar connect and the gears engaged on the clamping device drive the claw driver slot that is positioned on the gear does eccentric rotary, make the claw axially-movable simultaneously, realization is to the synchronous clamping of workpiece and unclamp action, described clamping device is made up of claw and the multi-head spiral processed on the gear axial end, the driver slot of processing and gear curve push rod respective shapes on claw, multi-head spiral is assembled in the claw driver slot.

The eccentric helical disk of design bull realizes promoting synchronously the structure of a plurality of claws on gear.

The eccentric spiral of described design bull has guaranteed the structure that multijaw is synchronous, claw stroke 40-120mm, eccentric coordinate X:40-80mm, Y:10-30mm.

The beneficial effects of the utility model are: when the gear of hydraulic oil cylinder driving rack drives multi-head spiral rotated, the eccentric rotary of multi-head spiral had realized the synchronous clamping of claw and has unclamped action by the driver slot on the claw.

The center of circle by accurate calculating and computer simulation choose reasonable multi-head spiral in the design of the utility model multi-head spiral distributes, and appropriate design multi-head spiral helix has been realized the rise maximization of multi-head spiral, there is no the motion dead point.The utility model has realized that not only a plurality of claws are synchronized with the movement, and saves a plurality of cylinder apparatus, has reduced volume, weight and the cost of equipment.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the multi-head spiral gear schematic diagram in the utility model device;

Fig. 3 is the A-A face cutaway view of Fig. 2;

Fig. 4 is the claw schematic diagram of band driver slot in the utility model;

Fig. 5 is that the F of Fig. 4 is to schematic diagram;

Fig. 6 is the clamping device structural representation of prior art.

The specific embodiment

In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with drawings and embodiments.

Among the figure, 1. claw, 2. oil cylinder, 3. gear, 4. tooth bar, 5. multi-head spiral, 6. claw driver slot.

As Fig. 1-Fig. 5 as can be known the utility model multi-head spiral synchronous clamping device the time be thereby that piston rod by an oil cylinder 2 drives tooth bar 4 driven gear 3 that moves up and down and rotates in work.The rotation of gear 3 makes the multi-head spiral 5 that is positioned at claw driver slot 6 do eccentric rotary, makes claw 1 axially-movable simultaneously, has realized synchronous clamping and action of releasing.This shows that this device realizes being synchronized with the movement of many claws under the prerequisite of having saved five cylinder apparatus, significantly reduced the volume of equipment, weight and cost.

Calculate choose reasonable center of circle O point with the claw of being with driver slot by precision as Fig. 2-gear that has multi-head spiral shown in Figure 5, choose reasonable curve Ra, Rb, make multi-head spiral when driving claw, have synchronously, with the advantage of rise, as claw stroke 40-120mm, eccentric coordinate X:40-80mm, realize the rise maximization during Y:10-30mm, clamping diameter maximization just.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. multi-head spiral dish sychronisation, it is characterized in that, comprise that the multi-head spiral that tooth bar that oil cylinder and oil cylinder piston bar connect and the gears engaged on the clamping device drive the claw driver slot that is positioned on the gear does eccentric rotary, make the claw axially-movable simultaneously, realization is to the synchronous clamping of workpiece and unclamp action, described clamping device is made up of claw and the eccentric spiral of the bull of processing on the gear axial end, the driver slot of processing and gear curve push rod respective shapes on claw, multi-head spiral is assembled in the claw driver slot.

2. multi-head spiral dish sychronisation according to claim 1 is characterized in that, the eccentric helical disk of design bull realizes promoting synchronously the structure of a plurality of claws on gear.

3. multi-head spiral dish sychronisation according to claim 2 is characterized in that, the eccentric helical disk of described bull is the eccentric spiral synchronization structure of bull.

4. multi-head spiral dish sychronisation according to claim 1 and 2 is characterized in that, described claw stroke 40-120mm, eccentric coordinate X:40-80mm, Y:10-30mm.