CN211053145U - Linkage type clamping mechanism - Google Patents

Abstract

The utility model discloses a linkage type clamping mechanism, which comprises two positioning devices and two pressing devices, wherein the positioning devices are provided with a plurality of limiting points which are distributed in a centering surrounding way and can be adjusted in position; the pressure position device is positioned between the two positioning devices, one pressure position device is respectively connected with corresponding limit points on the two positioning devices, the pressure position device can move along with the position adjustment of the limit points, the pressure position device is provided with a movable pressure connecting position, and the pressure connecting positions are at least two and are distributed around the central shaft of the positioning devices. The utility model discloses can adapt to the not unidimensional of work piece at any time and carry out quick accurate fixed with spacing, effectively ensure simultaneously that the work piece of clamping joint can not incline and the center is skew, satisfy current processing demand better.

Description

Linkage type clamping mechanism

Technical Field

The utility model relates to a mechanical fixture specifically is coordinated type clamping mechanism.

Background

In the current mechanical production and processing, large workpieces with large body length such as columns, pipes, inner containers, bottles and the like are fixed on stations by using corresponding positioning devices for processing, the common positioning of the common workpieces is mostly realized by using clamps, most of the existing clamps are used for fastening and clamping local parts of the workpieces, such as clamp devices of lathes, but the clamps are only suitable for the workpieces with strong rigidity and short shape, the inner containers, the bottles and the thick pipes with poor rigidity and large length are not suitable for fixing the workpieces by using the clamps, the processing positions of the workpieces span a wide range, and the local fastening and clamping can not guarantee the complete fixation or alignment of the workpieces, so the whole workpieces are required to be fixed in a contact manner.

In the prior art, some clamping devices or limiting clamps are used for processing large workpieces of cylindrical structures such as liners and bottles, wherein some mechanisms adopt dispersed parts to be abutted against the workpieces, and all the parts are independently operated and are asynchronous mechanisms, so that the large workpieces are wide in applicable size and low in accuracy; or some clamping devices which are matched with a die specially suitable for workpieces with single size are adopted for clamping, namely, the clamping devices are integrated mechanisms which are difficult to simultaneously adapt to various sizes of workpieces, but have better precision than the clamping devices. However, these clamping mechanisms cannot be adapted to various sizes and have high precision, and cannot well meet the current increasing industrial requirements.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a coordinated type clamping mechanism realizes being suitable for spacing and fixed that multiple size and precision are high simultaneously to the work piece.

The utility model provides a technical scheme that its technical problem adopted is:

The linkage type clamping mechanism comprises two positioning devices and two pressing devices, wherein the positioning devices are provided with a plurality of positioning points which are distributed in a centering surrounding manner and can be adjusted; the pressure position device is positioned between the two positioning devices, one pressure position device is respectively connected with corresponding limit points on the two positioning devices, the pressure position device can move along with the position adjustment of the limit points, the pressure position device is provided with a movable pressure connecting position, and the pressure connecting positions are at least two and are distributed around the central shaft of the positioning devices.

The positioning device comprises a positioning ring and limiting pieces, the positioning ring is vertically arranged, the limiting pieces are equidistantly and circumferentially distributed on the positioning ring, each limiting piece can be radially adjusted along the positioning ring, and one end of each limiting piece, opposite to the center of the positioning ring, is a limiting point for abutting against a workpiece; the pressing device comprises a connecting rod and a pressing assembly, the connecting rod is parallel to the central line of the positioning device, two limiting parts corresponding to the two positioning devices are respectively connected with two ends of the connecting rod, and the pressing assembly is installed on the connecting rod.

The positioning device further comprises a driving ring, the driving ring is rotatably arranged on the positioning ring, the driving ring is in spiral transmission connection with the limiting piece, the limiting piece is in sliding connection with the positioning ring, the limiting piece is slidably arranged on a sliding groove of the positioning ring, and the cross section of the limiting piece is in an I shape.

The positioning device further comprises a driver, the outer wall of the driver is fixedly connected with the positioning ring, the driving ring is a toothed ring, and the driver correspondingly extends out of a driving rotating shaft with a gear and is in threaded connection with the side wall of the driving ring.

The end of the limiting part is provided with a butt-joint rod, the butt-joint rod is parallel to the axis of the positioning ring, one end of the butt-joint rod is arranged on the limiting part and extends outwards, and the outward end of the butt-joint rod extends outwards along the radial direction in an inclined mode.

The limiting part is provided with a rod seat used for installing a rod body at the tail end, one side of the rod seat is connected with the limiting part, the rod seat is provided with a recessed port respectively connected with the abutting rod and the connecting rod, and the abutting rod and the connecting rod are flush with one side wall surface facing the center of the positioning device.

The pressing component comprises a fixed frame, a pressing component and a power cylinder, the fixed frame is fixedly connected with the connecting rod and the power cylinder respectively, and the pressing component is connected with a piston rod of the power cylinder.

The pressing component is in a portal frame shape, two ends of the fixed frame are respectively provided with a connecting plate for connecting the connecting rod, the jacking part is positioned between the lower side of the fixed frame and the connecting rod, the power cylinder is installed on the upper side face of the fixed frame, a piston rod of the power cylinder penetrates through the fixed frame and is connected with the jacking part, two ends of the jacking part are respectively provided with a jacking block, the jacking block is in an arch-like shape, and two lower ends of two sides of the jacking block are respectively provided with a jacking rod.

The pressing device further comprises an alignment assembly, the alignment assembly is installed on the connecting rod, and the alignment assembly is provided with a movable blocking and connecting portion.

The alignment assembly comprises a connecting frame and a cylinder, one end of the connecting frame is clamped with the connecting rod through a clamping piece, the cylinder is tightly installed on the connecting frame, and a blocking piece is installed at the tail end of a piston rod of the cylinder.

The utility model has the advantages that: the linkage type clamping mechanism can be suitable for different sizes of workpieces at any time to carry out quick accurate fixing and limiting, and meanwhile, the clamping workpiece can be effectively prevented from inclining and deviating from the center, and the current processing requirement can be better met.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an embodiment of the positioning device of the present invention;

Fig. 3 is a schematic structural diagram of an embodiment of the middle-pressure station assembly of the present invention;

Fig. 4 is an enlarged schematic view of a partial installation structure in the embodiment of fig. 1 of the present invention.

Detailed Description

Referring to fig. 1 and 2, the linkage type clamping mechanism of the present invention includes two positioning devices and two pressing devices, the two positioning devices are provided with a plurality of positioning points which are centered, distributed around and can be synchronously adjusted, and the two positioning devices can synchronously adjust the position of the positioning points to adapt to hollow workpieces such as cylindrical, coil, pipe, etc. or solid workpieces such as bar, column, etc.; the pressing device is positioned between the two positioning devices, one pressing device is respectively connected with corresponding limit points on the two positioning devices, the pressing device can move along with the position adjustment of the limit points, the pressing device is provided with a movable pressing position for abutting against the middle section part of a workpiece, the pressing position preferably comprises at least two pressing positions which are distributed around the central shaft of the positioning devices, the two positioning devices are respectively arranged in tandem or in a head-to-tail manner, the horizontally arranged workpiece is clamped and connected through the limit points, each limit point can synchronously move with the pressing devices to realize the position adjustment, the workpieces with different sizes can be clamped and connected, each limit point can be firstly adjusted to a position matched with the workpiece, then the workpiece is placed in the positioning device to be abutted by each limit point, then each limit point synchronously condenses towards the central direction, so that the two positioning devices can clamp and connect the two ends of the workpiece, and simultaneously the pressing device clamps and connects the middle section part of the workpiece through the pressing position, the clamping is carried out from front, middle and back linkage; the positioning devices can directly realize the movement of a plurality of limiting points by a plurality of pneumatic cylinders, hydraulic cylinders and the like, and can also be realized by a mechanism such as a mandril, a clamping mechanism and the like, meanwhile, the two positioning devices can synchronously control the independent operation of respective positioning of the limiting points through a control system, and the linkage execution of the respective positioning can also be realized by utilizing a linkage structure; the pressing device can realize the pressing movement of the pressing position by a pressing mechanism or a clamp mechanism which is driven by general hydraulic pressure or pneumatic pressure, such as the telescopic pressing of a hydraulic rod, and such as a double-sided or multi-sided clamping mechanism driven by a multi-hydraulic rod or a pull rod.

Referring to fig. 1 and 2, as a preferred embodiment, the positioning device includes a positioning ring 11 and limiting members 12, the positioning ring 11 is installed vertically, a plurality of limiting members 12 are equidistantly and circumferentially distributed on the positioning ring 11, each limiting member 12 can be synchronously adjusted radially along the positioning ring 11, and one end of the limiting member 12 facing the center of the positioning ring 11 is a limiting point for abutting against a workpiece; the pressing device comprises a connecting rod 31 and a pressing component 32, the connecting rod 31 is parallel to the central line of the positioning device, two limiting parts 12 corresponding to the two positioning devices are respectively connected with two ends of the connecting rod 31, and the pressing component 32 is installed on the connecting rod 31; one side or one end of the pressing component 32 opposite to and abutted against the workpiece is a pressing position of a pressing device, the pressing component 32 can be a pressing block structure or an abutting point structure, the pressing component 32 can be used for installing the required pressing component 32 on the connecting rod 31 at the required position according to the factors of the shape, stress and the like of the workpiece, the pressing component 32 can be distributed in a plurality of numbers around the central line, namely the workpiece, or distributed in a plurality of numbers along the connecting rod 31 as required, so that sufficient pressing position abutting is provided from the annular and axial positions respectively, the pressing component 32 can approach or depart from the workpiece along with the connecting rod 31 and the limiting part 12, and meanwhile, the pressing component 32 can drive the pressing component 32 to abut against the workpiece through a hydraulic mechanism, a pneumatic cylinder or a motor connecting screw and other telescopic mechanisms; the positioning ring 11 is of an annular structure, the central part of the positioning ring is hollow, a workpiece and other mechanisms can penetrate through the positioning ring, the positioning ring can be suitable for hollow pipe type, barrel type workpieces or solid workpieces, the limiting part 12 can be directly clamped by a hydraulic rod or a pneumatic rod to advance and retract, the limiting part 12 can also be driven by a motor through a gear rack structure or a gear screw structure, and the positioning device can adjust the outer diameter sizes of the corresponding different workpieces through the radial movement of the limiting part 12 on the positioning ring 11.

Referring to fig. 2, the positioning device further includes a driving ring 13, the driving ring 13 is concentrically and rotatably mounted on the positioning ring 11, the driving ring 13 is in screw transmission connection with the limiting member 12, and the limiting member 12 is in sliding connection with the positioning ring 11; the driving ring 13 can be matched with the latch, the pin shaft or the guide post of the limiting part 12 through a spiral groove or a curved groove to perform spiral transmission, the positioning ring 11 is provided with a radially extending sliding groove matched with the sliding connection of the limiting part 12, the limiting part 12 is slidably mounted on the sliding groove of the positioning ring 11, and the cross section of the limiting part 12 is in an I shape, so that the limiting part 12 can only slide along the sliding groove of the positioning ring 11; the driving ring 13 is movably sleeved on the annular wall protruding in the axial direction of the positioning ring 11, and can also be slidably embedded in the inner side of the positioning ring 11, the driving ring 13 can be driven to rotate by a motor or a transmission mechanism, and then the rotation of the driving ring is converted into the linear motion of the limiting piece 12, the mechanism of the mechanism is the same as that of a common three-jaw chuck, so that the connection example of the driving ring 13 and the limiting piece 12 is omitted in the drawing, the limiting piece 12 is driven by the rotation of the driving ring 13, that is, all the limiting pieces 12 are driven simultaneously, and the driving ring.

Referring to fig. 2, the positioning device further includes a driver 14, an outer wall of the driver 14 is tightly connected with the positioning ring 11, the driving ring 13 is a toothed ring, the driver 14 correspondingly extends out of a driving shaft assembly with a gear to be in threaded connection with a side wall of the driving ring 13, the driver 14 can be a rotating shaft of a servo motor or a motor directly connected with the side wall of the driving ring 13 or a driving shaft passing through a reduction box and then passing through the gear driving ring 13, as shown in the figure, an outer ring surface is preferably designed on a tooth surface of the driving ring 13, and the driver 14 is engaged and driven from the outer side of the driving ring 13; each part of the positioning device is integrated on the positioning ring 11, so that the module body formed by each accessory is convenient.

Referring to fig. 1 and 2, the end of the limiting member 12 is provided with an abutting rod 121, the abutting rod 121 is parallel to the axis of the positioning ring 11, one end of the abutting rod 121 is installed on the limiting member 12 and extends outward, the outward end of the abutting rod 121 extends outward along a radial direction, the abutting rod 121 uses a rod body as an abutting surface, when installed, a workpiece passes through the positioning ring 11 from the outer side of one positioning device along the axial direction, the abutting rod 121 serves as a bearing and gear component and contacts the outer wall of the workpiece with a low pressure in a limiting manner, meanwhile, an outward flared horn formed by each abutting rod 121 can be guided into the workpiece and arrives at the two positioning devices in an aligned manner, the abutting rod 121 can be preferably a round rod, and a plurality of round rod bodies can be directly applied to; preferably, each positioning ring 11 has an even number of limiting members 12 symmetrically distributed left and right, and each two opposite limiting members 12 are located on the same radial straight line, so that the workpiece with multiple symmetrical shapes, such as a circle, a rectangle, a regular polygon, and the like, can be better adaptively limited.

Referring to fig. 4, a rod seat 122 for installing a rod body is disposed at the end of the limiting member 12, one side of the rod seat 122 is connected to the limiting member 12, recessed ports connected to the abutting rod 121 and the connecting rod 31 respectively are disposed at the lower end of the rod seat 122, the ends of the abutting rod 121 and the connecting rod 31 are opposite and flush with a side wall surface facing the center of the positioning device, the outer diameter of the abutting rod 121 is smaller than that of the connecting rod 31, the recessed port of the rod seat 122 is segmented into a segment, one segment is higher in position and smaller in inner diameter, the other segment is lower in position and larger in inner diameter, the abutting rod 121 and the connecting rod 31 are respectively assembled on two sides and flush with a side surface of the abutting, except for a limiting point connected to the two positioning devices, the connecting rod 31 is used as an extension of the abutting.

Referring to fig. 3, the pressing assembly 32 includes a fixed frame 321, a pressing member 322 and a power cylinder 323, the fixed frame 321 is respectively fastened to the connecting rod 31 and the power cylinder 323, the pressing member 322 is connected to a piston rod of the power cylinder 323, one end of the pressing member 322 faces a center line of the positioning device and correspondingly presses the workpiece, the power cylinder 323 drives the pressing member 322 to move toward the workpiece and realize pressing, the pressing assembly 32 fixes the power cylinder 323 by using the fixed frame 321 as a base, the power cylinder 323 further drives the pressing member 322 to press and retreat toward the workpiece, the pressing assembly 32 is an active pressing, and the pressing is more flexible and accurate.

Referring to fig. 3, the pressing component 32 is in a shape of a portal frame, two ends of the fixed frame 321 are respectively provided with a connecting plate 3211 for vertically connecting the connecting rod 31, the pressing component 322 is located between the lower side of the fixed frame 321 and the connecting rod 31, the power cylinder 323 is installed on the upper side of the fixed frame 321, a piston rod of the power cylinder 323 passes through an opening of the fixed frame 321 and is connected with the pressing component 322, two ends of the pressing component 322 are respectively provided with a pressing block 3221, the pressing block 3221 is in an arch-like shape, the middle of the pressing block 3221 is an abdicating notch corresponding to the abdicating connecting rod 31, the lower ends of two sides of the pressing block 3221 are respectively provided with a pressing rod 3222 for abutting against a workpiece, at least two pressing rods 3222 of one pressing component 32 are respectively located at two sides of the connecting rod 31 and are parallel to the connecting rod 31, the connecting rod 31 passes through the connecting plate 3211 at one end of the fixed frame 321, the connecting rod 31 is, two sides of two pressing blocks 3221 of one pressing member 322 are respectively provided with a same pressing rod 3222, the pressing member 322 is driven by the power cylinder 323, the pressing member 322 can move up and down in the space between the fixed frame 321 and the connecting rod 31, when moving down along with the pressing member 322, the arched notch in the middle of the pressing block 3221 is matched with the abdicating connecting rod 31, so that the position conflict between the pressing block 3221 and the connecting rod 31 is avoided, the pressing rod 3222 moves along with the pressing member 322 to press and abut against a workpiece at two pressing positions, and the two rod bodies can be correspondingly suitable for the surfaces of workpieces with various shapes in an abutting mode.

Referring to fig. 3, the top pressing member 322 is provided with two guide rods 3223 extending toward the fixed frame 321, the fixed frame 321 is provided with two sleeves 3212 correspondingly sleeved with the guide rods 3223, the upper surface of the fixed frame 321 is rectangular, the guide rods 3223 and the sleeves 3212 are respectively arranged on two sides of the power cylinder 323 in a linear array, the guide rods 3223 penetrate through the sleeves 3212 from the lower side of the fixed frame 321 to be in sliding fit, and the top pressing member 322 is guided to move stably in a reciprocating manner.

Referring to fig. 3, the connecting plate 3211 is a separate component vertically connected to the lower side of the end of the fixed frame 321, the connecting plate 3211 is fastened and connected by passing through the fixed frame 321 through bolts or screws, a gap is left between the middle section and the end of the connecting plate 3211 to divide the connecting plate into two parts and facilitate deformation, meanwhile, the end of the connecting plate 3211 is provided with an arc-shaped clamping opening for clamping the connecting rod 31, and a matching bolt transversely passes through the middle section of the connecting plate 3211 to draw the two parts together so as to clamp the connecting rod 31; similarly, the pressing block 3221 is also an independent component and is vertically fastened and connected to two ends of the pressing member 322 through a bolt and a screw, the tail end of the pressing block 3221 is also provided with an arc-shaped clamping opening for clamping the pressing rod 3222, a gap which divides the tail end of the pressing block 3221 into two parts and facilitates slight deformation is similarly reserved between the middle section and the tail end of the pressing block 3221, and the pressing rod 3222 is clamped by the bolt which is matched with the bolt to transversely penetrate through the middle section of the connecting pressing block 3221 and pull the two parts together; the fixed frame 321 and the connecting plate 3211, and the pressing member 322 and the pressing block 3221 may also be integrally formed components.

Referring to fig. 1 and 4, the positioning device further includes an alignment assembly 33, the alignment assembly 33 is mounted on the connecting rod 31, the alignment assembly 33 has a movable blocking portion, the positioning assembly is set at a position close to one of the positioning devices, and the blocking portion blocks the movement of the workpiece along the central line direction of the positioning device, before loading the workpiece or during unloading the workpiece, the blocking portion can move away from the blocking portion to facilitate the workpiece entering and exiting or loading and unloading, and the blocking portion of the alignment assembly 33 can be implemented by a blocking member capable of rotating back and forth, swinging or extending, such as a hinge member only rotatable around the connecting rod 31, or a lock pin capable of extending out of the connecting rod 31.

Referring to fig. 4, the aligning assembly 33 includes a connecting frame 331 and an air cylinder 332, one end of the connecting frame 331 clamps the connecting rod 31 through a clamping member, the air cylinder 332 is fixedly mounted on the connecting frame 331, a stopper serving as a stopper is mounted at a distal end of a piston rod of the air cylinder 332, a guide hole matching with the piston rod slidably penetrating through the air cylinder 332 is further disposed on the connecting frame 331, the air cylinder 332 drives the stopper to move back and forth into the positioning device, a workpiece is loaded on the clamping mechanism and needs to move along a central line to reach a corresponding position, the aligning assembly 33 pushes out the stopper through the air cylinder 332 before the workpiece is loaded, so that the end of the workpiece after being loaded reaches the stopper to be stopped as a reference position, when the workpiece is unloaded, the air cylinder 332 moves the stopper away from the position, and the workpiece can be quickly.

The linkage clamping method of the linkage type clamping mechanism comprises the following steps: the two positioning devices synchronously regulate and control the position of each limit point to a position corresponding to the size of the outer wall of the workpiece in a linkage manner according to the size of the workpiece, and the pressing device moves to the corresponding position along with the limit point; secondly, according to the shape of the workpiece and the positions of the limit points around the workpiece, the workpiece can be placed between the limit points along the central line direction of the positioning device or from a radial vacant position, each limit point can move or be finely positioned to clamp the workpiece, and the crimping position of the crimping device is in corresponding crimping with the surface of the workpiece; thirdly, the pressing position of the pressing position device leaves the surface of the workpiece, the clamping of each limit point is released, and the workpiece moves out; and then loading the next workpiece, and repeating the second step and the third step if the size of the workpiece is not changed, or repeating the first step, the second step and the third step if the size of the workpiece is changed. The workpiece is clamped and connected by the corresponding limiting points after the workpiece is placed, the middle part of the workpiece is pressed and connected by the pressing and positioning device, the flow is opposite when the workpiece is unloaded, the pressing and connecting position of the pressing and positioning device leaves the surface of the workpiece, or the clamping and connecting is released by fine adjustment or movement of each limiting point, and if the size of the workpiece is not changed, the limiting points do not need to be further adjusted.

In a preferred embodiment, every two limiting members 12 corresponding to the two positioning devices and the connecting rod 31 connected with the limiting members 12 are adjusted in a linkage manner along the radial direction of the positioning ring 11, the limiting members 12 are in positions, the limiting points are condensed around the workpiece to be clamped between the limiting members 12 after the workpiece is fed along the central line direction of the positioning ring 11, and at least two pressing assemblies 32 are pressed against the workpiece after the connecting rod 31 is in position. The pressing component 32 can be pressed to the workpiece symmetrically from the upper and lower sides or the left and right sides according to different factors, and the limiting component 12 is clamped around the workpiece at least from the lower half-circumference direction, i.e. the two sides are clamped and matched with the lower side for supporting, and the limiting component 12 can also be completely clamped around the workpiece in the whole circumference.

Still further, through the cooperation of the driving ring 13 and the driving ring 14 or other synchronous mechanisms, the position limiting members 12 of the same positioning device are synchronously adjusted along the radial direction in a linkage manner, the position of each limiting member 12 relative to the center position is consistent all the time, and the position limiting members 12 of two positioning devices are also consistent, that is, each limiting member 12 can be adjusted at the same time when the workpieces are transported and loaded, and the center is always determined to be unchanged.

Furthermore, a workpiece is loaded from one side of a positioning device along the central line, even if the workpiece deviates, the edge of one end of the workpiece is contacted with the obliquely outwards extending part of the abutting rod 121 and automatically guided to the central position, the abutting rod 121 and the connecting rod 31 are guided together in the process of entering the workpiece, and the aligning component 33 moves the aligning position between the blocking part and the limiting point to be abutted against the workpiece at one side close to the positioning device; when the workpiece is unloaded, the stop part of the positioning component 33 is moved away from the positioning position, the pressing component 32 returns to the original flavor and stops pressing, the limiting part 12 is unclamped, and the workpiece is moved away from the positioning device along the central line direction.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be noted that the terms of left, right, upper and lower directions in the embodiments of the present invention are only relative concepts or are referred to the normal use state of the product, and should not be considered as limiting.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should fall within the protection scope of the present invention as long as the technical effects are achieved by any of the same or similar means.

Claims (10)

1. Linkage type clamping mechanism, its characterized in that: the positioning device is provided with a plurality of centering surrounding distributed position-adjustable limit points; the pressure position device is positioned between the two positioning devices, one pressure position device is respectively connected with corresponding limit points on the two positioning devices, the pressure position device can move along with the position adjustment of the limit points, the pressure position device is provided with a movable pressure connecting position, and the pressure connecting positions are at least two and are distributed around the central shaft of the positioning devices.

2. The coordinated type clamping mechanism of claim 1, characterized in that: the positioning device comprises a positioning ring and limiting pieces, the positioning ring is vertically arranged, the limiting pieces are equidistantly and circumferentially distributed on the positioning ring, each limiting piece can be radially adjusted along the positioning ring, and one end of each limiting piece, opposite to the center of the positioning ring, is a limiting point for abutting against a workpiece; the pressing device comprises a connecting rod and a pressing assembly, the connecting rod is parallel to the central line of the positioning device, two limiting parts corresponding to the two positioning devices are respectively connected with two ends of the connecting rod, and the pressing assembly is installed on the connecting rod.

3. The coordinated type clamping mechanism of claim 2, characterized in that: the positioning device further comprises a driving ring, the driving ring is rotatably arranged on the positioning ring, the driving ring is in spiral transmission connection with the limiting piece, the limiting piece is in sliding connection with the positioning ring, the limiting piece is slidably arranged on a sliding groove of the positioning ring, and the cross section of the limiting piece is in an I shape.

4. The linkage type clamping mechanism according to claim 3, characterized in that: the positioning device further comprises a driver, the outer wall of the driver is fixedly connected with the positioning ring, the driving ring is a toothed ring, and the driver correspondingly extends out of a driving rotating shaft with a gear and is in threaded connection with the side wall of the driving ring.

5. The linkage type clamping mechanism according to any one of claims 2 to 4, wherein: the end of the limiting part is provided with a butt-joint rod, the butt-joint rod is parallel to the axis of the positioning ring, one end of the butt-joint rod is arranged on the limiting part and extends outwards, and the outward end of the butt-joint rod extends outwards along the radial direction in an inclined mode.

6. The linkage type clamping mechanism according to claim 5, characterized in that: the limiting part is provided with a rod seat used for installing a rod body at the tail end, one side of the rod seat is connected with the limiting part, the rod seat is provided with a recessed port respectively connected with the abutting rod and the connecting rod, and the abutting rod and the connecting rod are flush with one side wall surface facing the center of the positioning device.

7. The linkage type clamping mechanism according to any one of claims 2 to 4, wherein: the pressing component comprises a fixed frame, a pressing component and a power cylinder, the fixed frame is fixedly connected with the connecting rod and the power cylinder respectively, and the pressing component is connected with a piston rod of the power cylinder.

8. The linkage type clamping mechanism according to claim 7, characterized in that: the pressing component is in a portal frame shape, two ends of the fixed frame are respectively provided with a connecting plate for connecting the connecting rod, the jacking part is positioned between the lower side of the fixed frame and the connecting rod, the power cylinder is installed on the upper side face of the fixed frame, a piston rod of the power cylinder penetrates through the fixed frame and is connected with the jacking part, two ends of the jacking part are respectively provided with a jacking block, the jacking block is in an arch-like shape, and two lower ends of two sides of the jacking block are respectively provided with a jacking rod.

9. The linkage type clamping mechanism according to any one of claims 2 to 4, wherein: the pressing device further comprises an alignment assembly, the alignment assembly is installed on the connecting rod, and the alignment assembly is provided with a movable blocking and connecting portion.

10. The ganged clamp mechanism of claim 9, wherein: the alignment assembly comprises a connecting frame and a cylinder, one end of the connecting frame is clamped with the connecting rod through a clamping piece, the cylinder is tightly installed on the connecting frame, and a blocking piece is installed at the tail end of a piston rod of the cylinder.

Images