CN201115908Y - Automatic centering locking mechanism - Google Patents

Abstract

The utility model relates to a self-centring locking mechanism used for fixing a workpiece in the machining industry. The self-centring locking mechanism comprises a clamp body, wherein, a push rod which can move axially is arranged in the inner side of the clamp body; one end of the push rod touches with the incline of an apical axis which is positioned in a hole inside a support saddle fixed and connected with the clamp body; the other end of the push rod is connected with a rotating rod positioned in the clamp body in a screw thread way; the rotating rod is axially positioned in the clamp body; a core pin is arranged in an inner hole on the rotating rod; one end of the core pin is sleeved with a spring which props between the rotating rod and the core pin; holes are axially produced on the rotating rod; clamp pins are arranged in the holes; one ends of the clamp pins present a fork shape and prong the core pin; the holes are arranged on the clamp pins; declinate slotted holes are arranged at the corresponding positions on the core pin; pin rolls are arranged in the holes on the clamp pins and the declinate slotted holes on the core pin. In the self-centring locking mechanism, a locking device of the clamp pins is added under the circumstances of screw thread squegging, the clamping capability is increased, the locking can be acted automatically, the self-centring locking mechanism is flexible and reliable, and the workpiece precision cannot be influenced during the machining process.

Description

Self-alignment locking mechanism

Technical field

The utility model relates to a kind of retaining mechanism, is used for fixing the self-alignment locking mechanism of workpiece in particularly a kind of machining industry.

Background technology

In the machining industry, the device that is used for fixing workpiece is more, with the apparatus structure of the immediate fixation workpiece of the utility model be: a clamp body is arranged, being provided with in the clamp body inboard can axially movable push rod, one termination of push rod contacts with the apical axis inclined-plane, apical axis is positioned at the hole of the bearing inboard of fixedlying connected with clamp body, the other end of push rod is threaded with the bull stick T type that is positioned at clamp body, the bull stick axial location is in clamp body, rotate bull stick by mechanical spanner during work, because the bull stick axial location is in clamp body, the push rod that is threaded with bull stick can axially move under the driving of bull stick, promoting apical axis by the inclined-plane moves, the apical axis external end head can lean on the workpiece that desire is fixed, be provided with this device that three branches such as circumference are provided with on clamp body, three apical axis can lean on workpiece simultaneously, finally reach the purpose of fixation workpiece.The fixture shortcoming of this structure is that locking effect is bad after clamping, and the self-locking that can only lean on screw thread in the course of the work, because vibration or other reasons may cause becoming flexible, influences the machining accuracy of workpiece.

The utility model content

Problem to be solved in the utility model is the problem that the fixing back of existing Work fixing device lock ability is strong, easily become flexible, often influence machining accuracy, at the problems referred to above, but the purpose of this utility model provides in the strong auto lock of a kind of ability of clamping, flexibility and reliability, the process not the self-alignment locking mechanism that can exert an influence to workpiece accuracy, overcomes the deficiencies in the prior art.

Self-alignment locking mechanism of the present utility model, it comprises clamp body 13, being provided with in the inboard of clamp body 13 can axially movable push rod 3, one termination of push rod 3 contacts with apical axis 2 inclined-planes, apical axis 2 is positioned at the hole of bearing 1 inboard of fixedlying connected with clamp body 3, the other end of push rod 3 is threaded with the bull stick 4 that is positioned at clamp body 13, bull stick 4 axial location are in clamp body 13, it is characterized in that: in the endoporus of bull stick 4, be provided with core bar 6, one end of core bar 6 is with spring 14 and leans between bull stick 4 and core bar 6, on bull stick 4, radially process porose, be provided with locking pin 7 in this hole, an end of locking lock 7 is forked and pitches on core bar 6, and is porose on locking pin 7, in the corresponding position of core bar 6 oblique slotted hole is arranged, bearing pin 15 is packed in the hole and the oblique slotted hole on the core bar 6 on the locking pin 7.

Self-alignment locking mechanism of the present utility model, a termination of wherein said push rod 3 and contact position, apical axis 2 inclined-plane are the dovetail groove connected mode.

Self-alignment locking mechanism of the present utility model, the external end head of wherein said apical axis 2 is connected to clamping head 11, is provided with adjusting pad 10 between clamping head 11 and apical axis 2.

Self-alignment locking mechanism of the present utility model, owing in the endoporus of bull stick 4, be provided with core bar 6, one end of core bar 6 is with spring 14 and leans between bull stick 4 and core bar 6, on bull stick 4, radially process porose, be provided with locking pin 7 in this hole, one end of locking lock 7 is forked and pitches on core bar 6, porose on locking pin 7, in the corresponding position of core bar 6 oblique slotted hole is arranged, bearing pin 15 is packed in the hole and the oblique slotted hole on the core bar 6 on the locking pin 7, push rod 21 during work on the machinery spanner withstands on the core bar 6, core bar 6 is moved up, and spring 14 is compressed, and bearing pin 15 moves along the oblique elongated slot on the core bar 6, force locking pin 7 to move right, break away from the madial wall of clamp body 13.Mechanical then spanner rotates bull stick 4, makes push rod 3 make up or down rectilinear motion under threaded function, does the rectilinear motion of horizontal direction by inclined-plane drive apical axis 2, to reach the clamping of workpiece or the purpose of unclamping.When manipulator broke away from this mechanism, because the effect core bar 6 of spring 14 moves downward, bearing pin 15 moved along the long skewed slot on the core bar 6, forces locking pin 7 to withstand clamp body 13, to reach locking state.So this device has increased the locking device of locking pin 7 again under the situation of screw thread self-locking, its ability that clamps is strengthened, auto lock, flexibility and reliability can not exert an influence to workpiece accuracy in the process.

Description of drawings

Fig. 1 is the structural representation of the utility model specific embodiment;

Fig. 2 is an A-A sectional schematic diagram shown in Figure 1.

The specific embodiment

As shown in the figure: 13 is clamp body, is inlaid with positioning sleeve 12 in the inboard of clamp body 13, and the top bolting is connected with bearing 1.Push rod 3 is equipped with at endoporus place at positioning sleeve 12, the upper end of push rod 3 extend in the bearing 1, in bearing 1 with the push rod 3 vertical apical axis 2 that are provided with, be connected by oat tail groove structure between push rod 3 and the apical axis 2, stretch out outside the bearing 1 another termination of apical axis 2, and the clamping head 11 that has been threaded, between apical axis 2 and clamping head 11, be provided with adjusting pad 10.

The endoporus place, bottom of push rod 3 is processed with T type internal thread, and the upper end that is positioned at the bull stick 4 of positioning sleeve 12 is processed with T type external screw thread and push rod 3 matches.Bearing 5 and bearing 18 are installed between bull stick 4 and the clamp body 13 to be used for supporting and carrying down moving mutually.Bolting has end cap 16 on the below clamp body 13 of bearing 18, between end cap 16 and the bull stick 4 sealing ring 8 is arranged, and is fixed with cover plate 9.4 endoporus places are provided with core bar 6 at bull stick, and the upper end of core bar 6 is with spring 14 and leans between bull stick 4 and core bar 6.Be processed with radial hole on the bull stick 4 between bearing 5 and the bearing 18, locking pin 7 is housed in this hole, an end of locking lock 7 is forked and pitches on core bar 6, and the prong inboard that is processed with plane and locking pin 7 herein on the core bar 6 matches.Processing is porose on locking pin 7, is processed with oblique slotted hole in the corresponding position of core bar 6, and bearing pin 5 is packed in the hole and the oblique slotted hole on the core bar 6 on the locking pin 7.

The course of work is as follows: when the push rod 21 on the mechanical spanner 20 withstands on the lower surface of core bar 6, core bar 6 is moved up, and this moment, spring 14 was compressed, and bearing pin 15 moves along the oblique elongated slot on the core bar 6, force locking pin 7 to move right, make the madial wall of the left end head disengaging clamp body 13 of locking pin 7.Mechanical then spanner 20 rotates bull stick 4, make push rod 3 under threaded function, make up or down rectilinear motion, drive apical axis 2 is done horizontal direction in bearing 1 inboard rectilinear motion by the dovetail groove between push rod 3 and the apical axis 2, owing to be that three groups of these devices are installed on the clamp body 13, the external end head of three apical axis 2 moves simultaneously, can clamp or unclamps workpiece 19.When manipulator broke away from this mechanism, because the effect core bar 6 of spring 14 moves downward, bearing pin 15 moved along the long skewed slot on the core bar 6, forces locking pin 7 to withstand clamp body 13, reaches locking state.

Claims (3)

1, a kind of self-alignment locking mechanism, it comprises clamp body (13), being provided with in the inboard of clamp body (13) can axially movable push rod (3), one termination of push rod (3) contacts with apical axis (2) inclined-plane, apical axis (2) is positioned at the inboard hole of bearing (1) of fixedlying connected with clamp body (3), the other end of push rod (3) is threaded with the bull stick that is positioned at clamp body (13) (4) T type, bull stick (4) axial location is in clamp body (13), it is characterized in that: in the endoporus of bull stick (4), be provided with core bar (6), one end of core bar (6) is with spring (14) and leans between bull stick (4) and core bar (6), on bull stick (4), radially process porose, be provided with locking pin (7) in this hole, one end of locking lock (7) is forked and pitches on core bar (6), go up porose at locking pin (7), there is oblique slotted hole corresponding position at core bar (6), and bearing pin (15) is packed in the hole and the oblique slotted hole on the core bar (6) on the locking pin (7).

2, self-alignment locking mechanism according to claim 1 is characterized in that: a termination of described push rod (3) and apical axis (2) contact position, inclined-plane are the dovetail groove connected mode.

3, self-alignment locking mechanism according to claim 2 is characterized in that: the external end head of described apical axis (2) is connected to clamping head (11), is provided with adjusting pad (10) between clamping head (11) and apical axis (2).

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