CN111136417A - Welding workpiece clamping device - Google Patents

Abstract

The invention discloses a welding workpiece clamping device which comprises a sleeve main body, a lifting ring, a guide mechanism, a first swinging body and a second swinging body, wherein the sleeve main body is telescopic in the vertical direction, the first swinging body and the second swinging body are inclined in the horizontal direction, the sleeve main body, the first swinging body and the second swinging body are connected through a pin shaft and can rotate around the pin shaft, a position stop mechanism is arranged in the sleeve main body, each swinging body is provided with a clamping assembly and an adjusting assembly, the clamping assemblies are sleeved on the swinging bodies, the distance between the clamping assemblies is adjusted through the adjusting assemblies, and the swinging bodies are provided with opening and closing control mechanisms for controlling the opening and closing angles of the swinging bodies on two sides with the pin. The invention aims to provide a welding workpiece clamping device which can clamp a large welding workpiece and directly transport the welding workpiece to a welding position for welding, can automatically clamp and release the workpiece without manpower, saves labor force, ensures safety, effectively avoids the problem of workpiece deformation, has a simple structure, saves energy and well controls production cost.

Description

Welding workpiece clamping device

Technical Field

The invention relates to the technical field of welding, in particular to a welding workpiece clamping device. The IPC classification number is B23K 37/04.

Background

At present, the automobile manufacturing industry in China is developing rapidly and gradually becomes one of the post industries in China. In the automobile manufacturing process, the welding of sheet metal parts is an important process, and in the whole welding operation, a special clamping system needs to be matched for use so as to realize the rapid feeding/discharging of the sheet metal parts, and the sheet metal parts are effectively fixed and positioned after the feeding so as to guarantee the welding precision, so that the welding clamping system is an important auxiliary tool.

For welding non-bearing type vehicle bodies, such as large workpieces like automobile beams, the workpieces are clamped by a manipulator mode at present, but the clamping structure cannot consider the deformation and safety problems of the large workpieces, so that the accuracy of a welding position and the welding quality are affected, the working efficiency is reduced, the manipulator needs a plurality of electronic components, the structure is very complex, and the production cost is also affected.

The invention carries out detailed retrieval through the state intellectual property office official website retrieval service system, obtains the following prior arts, and simply introduces the prior arts so as to better understand the inventive concept of the invention and show the technical advantages and the technical characteristics of the invention.

Prior art 1: CN209550948U discloses an automatic welding fixture, which comprises: the welding machine comprises a first support, a second support, a ball screw, a motor, a cross beam, a sliding block, a connecting plate, a welding machine, a first clamp and a second clamp, wherein the first support and the second support are symmetrically and fixedly installed on the ground, the cross beam is fixedly installed between the first support and the second support, the ball screw is composed of a screw rod and a rotating nut, the nut is screwed on the periphery of the screw rod, two ends of the screw rod respectively penetrate through the first support and the second support and are rotatably installed on the first support and the second support, one end of the screw rod is connected with the motor which is fixedly installed on the first support or the second support, the cross beam is provided with a sliding groove, the sliding block is arranged on the sliding groove in a sliding manner, the nut is fixedly installed at the top end of the sliding block, the bottom end of the sliding block is fixedly connected with the welding machine through the connecting plate; but the adjusting capability of the device is poor, and the welding quality is difficult to ensure.

Prior art 2: CN107470820A discloses a reversed assembly welding tool, which comprises a working platform, a positioning module and a pressing module; the positioning module comprises a first positioning frame detachably erected on the working platform and a first supporting cross bar arranged on the first positioning frame; the first support cross bar is provided with a first positioning piece with a positioning datum plane facing downwards; the pressing module comprises a supporting upright post detachably erected on the working platform, and a first pressing frame and a second pressing frame which are arranged on the supporting upright post; the first pressing frame is provided with a first pressing ejector rod used for abutting against the upper surface of the workpiece to be welded, and the second pressing frame is provided with a second pressing ejector rod used for abutting against the upper surface of the workpiece to be welded. But the adjusting capability of the device is poor, and the welding quality is difficult to ensure.

Prior art 3: CN202037429U discloses a side beam welding pallet, which comprises a base, wherein two ends of the base are respectively provided with a fixing portion for being fixedly connected with a workpiece to be welded, two sides of the base are respectively provided with a connecting portion for clamping a welding turntable or a manipulator, and the base is uniformly provided with a plurality of mounting portions for fixing an auxiliary welding fixture. The fixture can be fixedly connected with workpieces to be welded with structures of different sizes, the rotary table and the manipulator are clamped at the interface parts at the two ends of the fixture, the interface parts can be universal in size and have hanging bayonet sockets, the connecting parts can be transferred along with the workpieces, the operation mode of following with the workpieces to be welded is realized, and the universality of the fixture tool is improved. But the adjusting capability of the device is poor, and the welding quality is difficult to ensure.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a welding workpiece clamping device capable of clamping a large welding workpiece and the like, directly transporting the welding workpiece to a welding position for welding, and effectively avoiding the problem of workpiece deformation by providing an opening and closing control mechanism; by arranging the position stop mechanism, the clamping and releasing of the workpiece can be automatically carried out without manual operation, so that the labor force is saved and the safety is ensured; the structure is simple, other power supplies such as electric signals or air pressure are not needed, energy is saved, and therefore production cost is well controlled.

The technical scheme adopted by the invention for solving the technical problems is as follows: a welding workpiece clamping device comprises a sleeve main body which extends and retracts in the vertical direction, a hanging ring arranged at the top of the sleeve main body, a guide mechanism, a first swinging body which inclines in the horizontal direction and a second swinging body which inclines in the horizontal direction, the sleeve main body, the first swinging body and the second swinging body are connected with each other through a pin shaft and can rotate around the pin shaft from the side surface, a position stop mechanism is arranged in the sleeve main body and stops the whole length of the sleeve main body at the shortest or longest position alternately, each swinging body is provided with a clamping component and an adjusting component, the clamping components are sleeved on the swinging body and the distance between the clamping components is adjusted through the adjusting component, the swing body is provided with an opening and closing control mechanism which controls the opening and closing angle of the swing body on two sides with the pin shaft as the center.

Further, the sleeve main body includes an outer cylinder, an inner cylinder, and a link, the guide mechanism is provided on one side of the sleeve main body, the guide mechanism includes a rotary member, a sliding body provided obliquely on a side wall of the outer cylinder, the rotary member includes a sliding shaft having an elongated shaft shape, and an engaging claw fixed to a side surface of the sliding shaft, the engaging claw sliding within the sliding body by telescopic movement of the sleeve main body.

Further, the slider body includes a pair of rails made of an elongated metal sheet, each of which is disposed in parallel with a space, and the engaging claw is formed by bending a round bar at a right angle at the center of the sliding shaft and forming an "L" shape.

Further, position stop mechanism includes cam plate, back shaft, spring and swing pawl, the cam plate inserts in the urceolus and fixed the upper portion that sets up at the urceolus internal surface, the pinhole that the back shaft was seted up through the downside of inner tube inserts the inner tube, the back shaft is fixed to the upper side surface of inner tube and the longitudinal direction of perpendicular to inner tube, swing pawl and spring insert in the back shaft in proper order, swing pawl upper end opening upwards is outstanding and is "L" shape on the whole, swing pawl is fixed to the cam plate.

Further, the cam plate comprises a cam base plate, an upper cam part, a middle cam part and a lower cam part, wherein the upper cam part comprises a first arc-shaped cam surface and a second straight-surface cam surface, and the first cam surface and the second cam surface are continuous; the middle cam portion has a third cam surface integrally formed on an entire outer periphery thereof and protrudes in an island shape in a center of the cam base plate; the lower cam portion includes fourth cam surface, fifth cam surface, fourth cam surface and fifth cam surface all are straight surface and the angle of intersection is the acute angle.

Further, the centre gripping subassembly is established on the swing body and is followed swing body sliding connection's centre gripping body and centre gripping arm including the cover, centre gripping body and centre gripping arm integrated into one piece, centre gripping arm perpendicular to centre gripping body, centre gripping arm in close contact with welding workpiece carries out the centre gripping operation.

Furthermore, the adjusting assembly comprises a first positioning plate fixedly connected with the swinging body, a second positioning plate fixedly connected with the clamping body, and a long bolt arranged between the first positioning plate and the second positioning plate, one side of the long bolt is fixedly connected with the first positioning plate, the other side of the long bolt adjusts the length through adjusting nuts respectively arranged on two sides of the second positioning plate, and the length direction of the long bolt is parallel to the length direction of the swinging body.

Further, switching control mechanism includes opening adjusting part and closed adjusting part, the fixed setting of opening adjusting part is in oscillating body one end, and carries out the regulation of aperture between the oscillating body of both sides with the sliding shaft cooperation of rotating member, the fixed end that sets up in one side of oscillating body of closed adjusting part, closed adjusting part carries out the regulation of closed angle between the oscillating body of both sides with the round pin axle cooperation.

Further, the opening adjusting assembly comprises a fixing nut and a first adjusting bolt, the fixing nut is fixedly arranged at the lower part of one end of the swinging body and perpendicular to the swinging body, the first adjusting bolt is in threaded connection with the fixing nut, and the distance from the top of the first adjusting bolt to the sliding shaft is adjusted through the screwing length of the first adjusting bolt.

Further, the closed adjusting assembly comprises an adjusting body and a second adjusting bolt, the adjusting body is fixedly arranged at the tail end of one side face of the swinging body, a screw hole is formed in the center of the adjusting body, the central axis of the screw hole is parallel to the swinging body, the second adjusting bolt is arranged in the screw hole, and the distance from the top of the second adjusting bolt to the front edge of the other swinging body is adjusted through the screwing length of the second adjusting bolt.

The invention has the advantages that:

the invention relates to a welding workpiece clamping device, which comprises a sleeve main body, a hanging ring, a guide mechanism, a first swinging body and a second swinging body, wherein the sleeve main body is telescopic in the vertical direction, the hanging ring is arranged at the top of the sleeve main body, the first swinging body is inclined in the horizontal direction, the second swinging body is inclined in the horizontal direction, workpieces and the like can be lifted and directly transported to a welding position for welding, the telescopic sleeve main body and a position stop mechanism can be arranged to extend and contract along the length direction of the sleeve main body on the whole length, and the sleeve main body is temporarily stopped at the position when the sleeve main body is completely extended and reduced to the minimum, so that the clamping and the releasing of the workpieces can be automatically carried out, the manual operation is not needed, the; the opening and closing control mechanism is arranged to control the opening and closing angles of the swinging bodies on two sides by taking the pin shaft as the center, and the downward rotation of the swinging bodies is limited, so that the closing angle cannot become narrower, and the problem of workpiece deformation is effectively avoided; by arranging the clamping assembly and the adjusting assembly, the clamping body can move and position on the swinging body in the forward and backward directions, can be adjusted and used for clamping various workpieces with different lengths, has strong applicability, can also adjust the weight balance determined by the arrangement of parts and the weight balance generated due to manufacturing deviation, and can keep the stability in a lifting state; the structure is simple, other power supplies such as electric signals or air pressure are not needed, energy is saved, and therefore production cost is well controlled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic view of a structure of the position stop mechanism of the present invention.

Fig. 4 is a schematic view of the structure of the cam plate of the present invention.

FIG. 5 is a schematic block diagram of a closure adjustment assembly of the present invention.

Fig. 6 is a schematic diagram of the operation of the present invention in the Y direction.

Fig. 7 is a schematic view of the operation of the present invention in the Z direction.

Wherein:

1. a sleeve body; 101. an outer cylinder; 102. an inner barrel; 103. a connecting rod; 104. a long hole; 105. a connecting pin;

2. a hoisting ring; 3. a first swinging body; 4. a second swinging body; 5. a pin shaft;

6. a position stop mechanism; 601. a cam plate; 6011. a cam base plate;

6012. an upper cam portion; 60121. a first cam surface; 60122. a second cam surface;

6013. a middle cam portion; 60131. a circular arc cam surface; 60132. a first linear cam surface;

60133. a first inclined cam surface; 60134. a second inclined cam surface; 60135. a third inclined cam surface; 60136. a second linear cam surface;

6014. a lower cam portion; 60141. a fourth cam surface; 60142. a fifth cam surface;

602. a swing pawl; 6021. a turning part; 6022. a swing lever; 6023. a guide claw; 6024. a swing shaft hole;

603. a spring; 604. a support shaft; 605. a screw;

7. a guide mechanism; 701. a sliding body; 7011. a track;

702. a rotating member; 7021. a sliding shaft; 7022. an engaging claw;

703. a first bearing portion; 704. a second bearing portion;

8. a clamping assembly; 801. a clamping body; 802. a clamp arm;

9. an adjustment assembly; 901. a first positioning plate; 902. a second positioning plate; 903. a long bolt; 904. adjusting the nut;

10. an opening/closing control mechanism; 1001. an opening adjustment assembly; 10011. fixing a nut; 10012. a first adjusting bolt;

1002. closing the adjustment assembly; 10021. an adjuster; 10022. a second adjusting bolt;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, a welding workpiece clamping device comprises a sleeve main body 1 which extends and retracts in the vertical direction, a hanging ring 2 which is arranged at the top of the sleeve main body 1, a guiding mechanism 7, a first swinging body 3 which inclines in the horizontal direction, and another second swinging body 4 which inclines in the horizontal direction, wherein the sleeve main body 1, the first swinging body 3 and the second swinging body 4 are connected with each other through a pin shaft 5 and can rotate around the pin shaft 5 from the side surface, a position stopping mechanism 6 is arranged in the sleeve main body 1, the position stopping mechanism 6 stops the whole length of the sleeve main body 1 at the shortest or longest position alternately, each swinging body is provided with a clamping component 8 and an adjusting component 9, the clamping component 8 is sleeved on the swinging body and the distance between the clamping components 8 is adjusted through the adjusting component 9, the swinging body is provided with an opening and closing control mechanism 10, the open/close control mechanism 10 controls the open/close angle of the swinging bodies on both sides around the pin 5.

The sleeve main body 1 includes an outer cylinder 101, an inner cylinder 102, and a link 103, the outer cylinder 101 is fitted with the inner cylinder 102, the guide mechanism 7 is provided at one side of the sleeve main body 1, the guide mechanism 7 includes a rotary member 702, a sliding body 701 provided obliquely on a side wall of the outer cylinder 101, the rotary member 702 includes a sliding shaft 7021 having an elongated shaft shape, and an engaging claw 7022 fixed to a side surface of the sliding shaft 7021, the engaging claw 7022 is formed by bending a round bar at a right angle at the center of the sliding shaft 7021 and forming an "L" shape, and the engaging claw 7022 slides within the sliding body 701 by a telescopic motion of the sleeve main body 1.

The sleeve body 1 has an outer shape of an elongated tube, an outer cylinder 101 of a square tube shape having a closed upper end and a hollow inside, and an inner space having a square cross section, an inner cylinder 102 of a square tube shape having a rectangular cross section and an inner hollow opening between upper and lower sides, an inner diameter of the inner cylinder 102 being smaller than an inner diameter of the outer cylinder 101, and an upper end of the inner cylinder 102 being slidably inserted into a lower end opening of the outer cylinder 101.

A pin hole is formed in a side surface of the lower end of the inner cylinder 102 in the horizontal direction, and a connecting pin 105 is inserted through a long hole 104 and the pin hole formed in the outer cylinder 101 and the inner cylinder 102, so that the lower end of the link 103 is fixed to the connecting pin 105, and the link 103 is made to be slidable up and down in the longitudinal direction thereof with respect to the outer cylinder 101 by the connecting pin 105.

The lifting ring 2 is fixedly arranged at the top of the sleeve main body 1 in a welding mode and the like, and the lifting ring 2 is hooked on a crane through a steel wire or a chain so that the whole device is lifted.

The slider 701 includes a channel-shaped rail 7011 formed of a pair of elongated metal pieces, each of the rails 7011 is disposed in parallel with a space therebetween, and the slider 701 is disposed obliquely so as to form a gentle angle with the vertical direction.

The second swinging body 4 is provided with a first bearing portion 703 and a second bearing portion 704, the sliding shaft 7021 passes through the first bearing portion 703 and the second bearing portion 704 and is connected with the first bearing portion 703 and the second bearing portion 704 in a relatively rotatable manner, so that the engaging claw 7022 of the sliding shaft 7021 can be disengaged from the sliding body 701, and the sleeve main body 1 is tilted to one side away from the rotating member 702 as a whole, that is, the sleeve main body 1 is folded as a whole, so that the device is convenient to package and store as a whole.

The first and second swinging bodies 3 and 4 are formed by bending an elongated steel plate to have a substantially U-shape, and a reinforcing plate is fixed at a position near an opening having the U-shape, the reinforcing plate being disposed between inner walls of both side walls.

The position stop mechanism 6 can temporarily hold a position by an extended or retracted position in the telescopic movement of the outer cylinder 101 and the inner cylinder 102. By this position stop mechanism 6, when the inner cylinder 102 is inserted into the innermost part of the outer cylinder 101, the position is temporarily held, so that even if the inner cylinder 102 is pulled out from the outer cylinder 101, it can have a function of not extending; then, when the inner cylinder 102 is inserted into the inside of the outer cylinder 101 again, the engagement is released, and the inner cylinder 102 can be extended outward from inside the outer cylinder 101. The position stop mechanism 6 has a function of alternately maintaining the minimum telescopic length and the maximum telescopic length by extending and contracting the inner cylinder 102 in the outer cylinder 101.

As shown in fig. 3, the position stop mechanism 6 includes a cam plate 601, a support shaft 604, a spring 603, and a swing pawl 602, the cam plate 601 being inserted into the outer cylinder 101 and fixedly provided at an upper portion of the inner surface of the outer cylinder 101 by screws 605, the screws 605 being respectively fixed in screw holes on the cam plate 601. The support shaft 604 is inserted into the inner cylinder 102 through a pin hole formed in a lower side surface of the inner cylinder 102, the support shaft 604 is fixed to an upper side surface of the inner cylinder 102 and is perpendicular to a longitudinal direction of the inner cylinder 102, the swing pawl 602 and the spring 603 are sequentially inserted into the support shaft 604, an upper end opening of the swing pawl 602 protrudes upward and is formed in an "L" shape as a whole, and the swing pawl 602 is fixed to the cam plate 601.

The rocking pawl 602 includes a turning portion 6021, a rocking lever 6022, and a guide claw 6023, wherein the turning portion 6021 has a rocking shaft hole 6024 opened at the center thereof, and the inner diameter of the rocking shaft hole 6024 is larger than the outer diameter of the support shaft 604, so that the rocking pawl 602 can freely rotate with respect to the support shaft 604. The swing lever 6022 is connected to an upper portion of the pivot part 6021 so as to extend upward, and a guide claw 6023 bent at a right angle is provided at an upper end of the swing lever 6022. The swing pawl 602 is formed in a slightly L-shape as viewed from the side by the swing lever 6022 and the guide claw 6023.

The spring 603 constantly presses the rocking pawl 602 toward the inner wall surface of the inner tube 102 due to its elasticity, and one side surface of the turning portion 6021 is elastically pressed against the inner wall of the inner tube 102, and a frictional force is generated between the inner wall of the inner tube 102 and the one side surface of the turning portion 6021, and the angular position of the rocking pawl 602 can be maintained so that the rocking pawl 602 does not fall to one side due to its own weight. So that the rocking pawl 602 is held at the raised position (the last angular position at which the rocking pawl 602 contacts and tilts with respect to the support shaft 604), and the angular position does not change unless a force is applied again.

The cam plate 601 has a cam surface formed by cutting the side surface of a thick metal plate (e.g., a material such as brass) using a milling machine or the like, so that a cam curve having a special shape according to which the guide pawls 6023 are made to follow is formed on the side surface of the cam plate 601 to make the swing lever 6022 (i.e., the entire swing pawl 602) movable to oscillate the swing pawl 602 at a constant cycle around the center of the support shaft 604.

The cam plate 601 includes a cam base plate 6011, an upper cam portion 6012, a middle cam portion 6013, and a lower cam portion 6014, as shown in fig. 4, the cam base plate 6011 is obtained by cutting a thick metal plate by milling or the like, the upper cam portion 6012 protrudes from an upper portion of the cam base plate 6011, and includes a first cam surface 60121 having an arc shape and a second cam surface 60122 having a straight surface, and the first cam surface 60121 and the second cam surface 60122 are continuous; the middle cam portion 6013 protrudes from the center of the cam base plate 6011 and has a third cam surface integrally formed over the entire outer circumference thereof, and protrudes in an island shape at the center of the cam base plate 6011; the lower cam portion 6014 protrudes from a lower portion of the cam base plate 6011, and includes a fourth cam surface 60141 and a fifth cam surface 60142, where the fourth cam surface 60141 and the fifth cam surface 60142 are both straight surfaces and have an acute intersection angle.

The first cam surface 60121 has an inverted "U" shape, and the apex of the first cam surface 60121 is formed in a semicircular shape, the apex B thereof is located slightly to the right of the center of the upper cam portion 6012, and the junction points a at both ends of the first cam surface 60121 and the second cam surface 60122 are located substantially at the center of the upper cam portion 6012. An upwardly open circular cam surface 60131 is formed on the upper portion of the third cam surface, a bottom point C of the circular cam surface 60131 is inclined to the left, a first linear cam surface 60132 perpendicular to the vertical direction is formed on the left side of the third cam surface, a junction point D between the circular cam surface 60131 and the first linear cam surface 60132, a first inclined cam surface 60133 inclined to the lower right is formed on the lower left portion of the third cam surface, a junction point E between the first linear cam surface 60132 and the first inclined cam surface 60133, a second inclined cam surface 60134 inclined to the upper right is formed on the lower portion of the third cam surface, a junction point F between the second inclined cam surface 60134 and the first inclined cam surface 60133, a third inclined cam surface 60135 connected to the second inclined cam surface 60134 and formed to the upper right, and a junction point G between the third inclined cam surface 60135 and the second inclined cam surface 60134, a second straight cam surface 60136 perpendicular to the vertical direction is formed on the right side surface of the third cam surface, a joint point between the second straight cam surface 60136 and the third inclined cam surface 60135 is H, and a joint point between the second straight cam surface 60136 and the circular arc cam surface 60131 is J. The point of engagement of the fourth cam surface 60141 with the fifth cam surface 60142 is at the apex K of the acute angle formed.

When the guide pawl 6023 moves on the cam plate 601, as shown in fig. 4, the original position of the guide pawl 6023 is at the broken line position in the drawing, first comes into contact with the second inclined cam surface 60134 and moves upward to the right, when the guide pawl 6023 passes through the joint point G, comes into contact with the third inclined cam surface 60135, continues to move upward to the right to pass through the joint point H, further comes into contact with the second linear cam surface 60136, then moves vertically to the joint point J, when the guide pawl 6023 further moves upward, that is, comes into contact with the lower surface of the first cam surface 60121, and the guide pawl 6023 finally moves to the position of the apex B along the first cam surface 60121 and stops at this position. When the guide claw 6023 is pulled down with respect to the cam plate 601, the guide claw 6023 is separated from the apex B and brought into contact with the circular arc cam surface 60131, when the guide claw 6023 is brought into contact with the inclined surface of the circular arc cam surface 60131 and pulled down, the guide claw 6023 reaches the bottom point C position of the circular arc cam surface 60131, and when the point C position is reached, the guide claw 6023 stops at this position and cannot move further downward, in which state the guide claw 6023 is locked on the circular arc cam surface 60131 of the middle cam portion 6013, and the rocking pawl 602 and the inner cylinder 102 in fig. 4 are locked.

When the guide claw 6023 is pushed up with respect to the cam plate 601, the guide claw 6023 is point-separated from the bottom C and brought into contact with the lower surface of the second cam face 60122, and since the point C is located on the left side of the engagement point a, the guide claw 6023 brought into contact with the second cam face 60122 is moved leftward in fig. 4 along the inclined face of the second cam face 60122 by being pushed up. When the guide pawl 6023 is pulled down relative to the cam plate 601 after moving leftward to some extent, by contacting the first linear cam surface 60132, it moves downward until the guide pawl 6023 contacts the upper surface of the fourth cam surface 60141, and when the guide pawl 6023 contacts the fourth cam surface 60141, the guide pawl 6023 moves rightward along the slope of the fourth cam surface 60141 until it reaches the apex K. If the guide claw 6023 moves below this apex K, the guide claw 6023 is positioned on the right side of the engagement point F in fig. 4, and when the guide claw 6023 is in such a position, the guide claw 6023 is positioned on the left side of the engagement point F when the guide claw 6023 is pushed upward again with respect to the cam plate 601 so that it does not contact the first inclined cam surface 60133 but contacts the lower surface of the second inclined cam surface 60134. Thereafter, the same movement as described above is performed. Therefore, when the guide pawls 6023 move up and down with respect to the cam plate 601, the movement of the guide pawls 6023 rotates counterclockwise around the center cam portion 6013, and the movement locus is indicated by X in fig. 4.

When the inner cylinder 102 and the outer cylinder 101 are assembled, the upper end of the inner cylinder 102 is inserted into the lower opening of the outer cylinder 101, and the positions of the long hole 104 and the pin hole are adjusted, the connecting pin 105 is inserted into the pin hole from one side of the outer cylinder 101, passes through the pin hole and the long hole 104, and then passes out from the rear surface of the outer cylinder 101, thereby connecting the outer cylinder 101 and the inner cylinder 102, and when the inner cylinder 102 is inserted into the outer cylinder 101 in the above manner, the swing pawl 602 is fixed to the cam plate 601 and comes into surface contact with the cam plate 601.

As shown in fig. 2, the clamping assembly 8 includes a clamping body 801 and a clamping arm 802, which are sleeved on the swinging body and slidably connected along the swinging body, the clamping body 801 and the clamping arm 802 are integrally formed, the clamping arm 802 is perpendicular to the clamping body 801, and the clamping arm 802 can be pressed on the left and right side surfaces of the workpiece to pinch and lift the workpiece, so as to move the workpiece to a welding position for welding operation.

As shown in fig. 2, the adjusting assembly 9 includes a first positioning plate 901 fixedly connected to the swing body, a second positioning plate 902 fixedly connected to the clamping body 801, and a long bolt 903 disposed between the first positioning plate 901 and the second positioning plate 902, wherein one side of the long bolt 903 is fixedly connected to the first positioning plate 901, the other side of the long bolt 903 is adjusted in length by adjusting nuts 904 disposed on both sides of the second positioning plate 902, and the length direction of the long bolt 903 is parallel to the length direction of the swing body.

The adjusting assembly 9 is connected with a long bolt 903 connected to the oscillating body in a cantilever manner and a clamping body 801 sliding on the oscillating body through threads, so that the clamping body 801 can move and position on the oscillating body in the forward and backward directions, can be adjusted and used for clamping various workpieces with different lengths, has strong applicability, can also adjust the weight balance determined by the arrangement of parts and the weight balance generated due to manufacturing deviation, and can keep the stability in a lifting state.

The holding member 801 is a frame body having a square cross section and a hollow U-shape inside, and the shape of the inner opening of the frame body is slightly larger than that of the inner opening of the swing member, so that the opening of the holding member 801 can be inserted into the rear end of the swing member,

the holding body 801 and the holding arm 802 at the lower portion of the holding apparatus can be moved from holding a long workpiece to holding a short workpiece by adjusting the adjusting unit 9 and the opening/closing control mechanism 10, and the holding body 801 and the holding arm 802 can be disposed to be in close contact with both left and right sides of the workpiece almost at the same time so that the fixing arm does not move unnecessarily when fixing and loading/unloading the workpiece. Therefore, the size of the clamping workpiece can be set, and the lifting and the holding can be carried out in a narrow environment.

As shown in fig. 2, the opening/closing control mechanism 10 includes an opening adjustment assembly 1001 and a closing adjustment assembly 1002, the opening adjustment assembly 1001 is fixedly disposed at one end of the first swinging member 3 and is matched with the sliding shaft 7021 of the rotating member 702 to adjust the opening degree between the swinging members at both sides, the closing adjustment assembly 1002 is fixedly disposed at the end of the first swinging member 3, and the closing adjustment assembly 1002 is matched with the pin 5 to adjust the closing angle between the swinging members at both sides.

The opening adjustment assembly 1001 includes a fixing nut 10011 and a first adjustment bolt 10012, as shown in fig. 2, the fixing nut 10011 is fixedly disposed at a lower portion of one end of the first swing body 3 and the fixing nut 10011 is perpendicular to the first swing body 3, the first adjustment bolt 10012 is screwed with the fixing nut 10011, and a distance from a top of the first adjustment bolt 10012 to the sliding shaft 7021 is adjusted by a screwing length of the first adjustment bolt 10012.

As shown in fig. 5, the closing adjustment assembly 1002 includes an adjustment body 10021 and a second adjustment bolt 10022, the adjustment body 10021 is fixedly disposed at the end of the first swinging body 3 and the adjustment body 10021 protrudes from the side of the first swinging body 3, the adjustment body 10021 is centrally disposed with a screw hole having a central axis parallel to the first swinging body 3, the second adjustment bolt 10022 is disposed in the screw hole, and the distance from the top of the second adjustment bolt 10022 to the front edge of the second swinging body 4 is adjusted by the screwing length of the second adjustment bolt 10022.

A pin hole is formed in a side wall of the first swinging body 3 to be fitted to a side surface of the lower end of the inner cylinder 102, and the pin shaft 5 is inserted by aligning the center axis of the pin hole so that the first swinging body 3 and the second swinging body 4 are rotatably connected. At this time, the central axis of the screw hole is spaced apart from the central axis of the pin hole in the vertical direction, and thus the central axis M of the second adjustment bolt 10022, which is screwed into the adjustment body 10021, is spaced apart from the central axis N of the pin hole in the axial direction.

Therefore, since the center axes M, N are vertically separated from each other, the head of the second adjustment bolt 10022 comes into contact with the lower portion of the leading end edge of the second swinging body 4. Second oscillating body 4 is rotatable about pin shaft 5, and the lower surface of the front edge of second oscillating body 4 is in contact with the head of second adjusting bolt 10022, so that first oscillating body 3 and second oscillating body 4 do not rotate. In other words, even if the first and second swinging bodies 3 and 4 are suspended by the sleeve main body 1, the first and second swinging bodies 3 and 4 have a slightly downward "C" shape, and the closing angle does not become narrower. The angle at which the first and second swinging bodies 3 and 4 are closed downward is related to the length by which the second adjustment bolt 10022 is screwed into the adjustment body 10021, and can be adjusted by moving the position of the head of the second adjustment bolt 10022.

The working mode is as follows:

when the integrated liner body 1 is assembled, as shown in fig. 1, the first oscillating body 3 and the second oscillating body 4 are assembled and alternately assembled so that the positions of the pin holes are matched. Then, the lower end of the inner cylinder 102 is fitted into the space between the first and second swinging bodies 3 and 4, thereby aligning the positions between the pin holes. Then, the pin 5 is inserted into the pin hole from the side surface of the first swinging body 3 to connect these three members. After the device is assembled, the lifting ring 2 is hooked on a crane through a steel wire or a chain to lift the whole device. By the contact of the head of the first adjustment bolt 10012 of the opening adjustment assembly 1001 with the lower surface of the slide shaft 7021, the first and second swinging bodies 3 and 4 are restricted from rotating about the pin 5, so that the clamping device is in an open state (see fig. 6).

When the work gripping is performed, the apparatus comes above the work, and when the center lower surface of the apparatus contacts the work, as shown in fig. 6, when the object moves in the Y direction so that the inner cylinder 102 is inserted into the outer cylinder 101, the swing pawl 602 moves between the upper cam portion 6012 and the middle cam portion 6013. And then closely contact the left and right sides of the workpiece through the clamping assembly 8 and the adjusting assembly 9. Then the crane lifts the workpiece by a wire or chain, as shown in fig. 7, when the object is lifted in the Z direction, the hoisting ring 2 is pulled by a wire or the like hung on the crane, the outer cylinder 101 is pulled, the inner cylinder 102 is pulled by the connecting pin 105, and the closing angle is not made narrower by the closing adjusting component 1002, so as to avoid the workpiece from being deformed due to excessive pressing on the workpiece.

When the weight W is gripped and moved to a predetermined position, the weight W needs to be put down at that position, and the wire rope suspended from the crane is further lowered as shown in the Y direction in fig. 6, so that the inner cylinder 102 is pushed into the inside of the outer cylinder 101, so that the total length of the sleeve body 1 is shortened. As the outer cylinder 101 descends, the inner cylinder 102 relatively rises, so that the swing pawl 602 connected to the inner cylinder 102 moves, and by the movement of the X movement locus, the swing pawl 602 is caused to escape from the upper surface of the cam portion 6013, that is, the workpiece is released.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A welding workpiece clamping device is characterized by comprising a sleeve main body which extends and retracts in the vertical direction, a hanging ring arranged at the top of the sleeve main body, a guide mechanism, a first swinging body which inclines in the horizontal direction and a second swinging body which inclines in the horizontal direction, the sleeve main body, the first swinging body and the second swinging body are connected with each other through a pin shaft and can rotate around the pin shaft from the side surface, a position stop mechanism is arranged in the sleeve main body and stops the whole length of the sleeve main body at the shortest or longest position alternately, each swinging body is provided with a clamping component and an adjusting component, the clamping components are sleeved on the swinging body and the distance between the clamping components is adjusted through the adjusting component, the swing body is provided with an opening and closing control mechanism which controls the opening and closing angle of the swing body on two sides with the pin shaft as the center.

2. The welding workpiece holding device as set forth in claim 1, wherein the sleeve main body comprises an outer cylinder, an inner cylinder and a link, the guide mechanism is provided on one side of the sleeve main body, the guide mechanism comprises a rotary member, a slide body provided obliquely on a side wall of the outer cylinder, the rotary member comprises a slide shaft having an elongated shaft shape, and an engaging claw fixed to a side surface of the slide shaft, the engaging claw slides within the slide body by telescopic movement of the sleeve main body.

3. A welding workpiece holding apparatus as claimed in claim 2, wherein said sliding body comprises a pair of rails made of an elongated metal piece, each of said rails being disposed in parallel with a space therebetween, and said engaging claw is formed by bending a round bar at a right angle at the center of the sliding shaft and forming an "L" shape.

4. The welding workpiece clamping device as claimed in claim 1, wherein said position stop mechanism comprises a cam plate inserted into the outer cylinder and fixedly disposed at an upper portion of an inner surface of the outer cylinder, a support shaft inserted into the inner cylinder through a pin hole formed in a lower side surface of the inner cylinder, said support shaft fixed to an upper side surface of the inner cylinder and perpendicular to a longitudinal direction of the inner cylinder, a spring, and a swing pawl inserted into the support shaft in this order, said swing pawl having an upper end opening protruding upward and being formed in an "L" shape as a whole, said swing pawl being fixed to the cam plate.

5. The welding workpiece holding apparatus of claim 4, wherein the cam plate comprises a cam base plate, an upper cam portion, a middle cam portion, and a lower cam portion, the upper cam portion comprises a first cam surface having an arc shape and a second cam surface having a straight surface, and the first cam surface and the second cam surface are continuous; the middle cam portion has a third cam surface integrally formed on an entire outer periphery thereof and protrudes in an island shape in a center of the cam base plate; the lower cam portion includes fourth cam surface, fifth cam surface, fourth cam surface and fifth cam surface all are straight surface and the angle of intersection is the acute angle.

6. The welding workpiece clamping device of claim 1, wherein the clamping assembly comprises a clamping body and a clamping arm, the clamping body and the clamping arm are sleeved on the swinging body and slidably connected along the swinging body, the clamping body and the clamping arm are integrally formed, the clamping arm is perpendicular to the clamping body, and the clamping arm is in close contact with the welding workpiece to perform clamping operation.

7. The welding workpiece clamping device as claimed in claim 1, wherein the adjusting component comprises a first positioning plate fixedly connected with the oscillating body, a second positioning plate fixedly connected with the clamping body, and a long bolt arranged between the first positioning plate and the second positioning plate, one side of the long bolt is fixedly connected with the first positioning plate, the other side of the long bolt is adjusted in length through adjusting nuts respectively arranged on two sides of the second positioning plate, and the length direction of the long bolt is parallel to the length direction of the oscillating body.

8. The welding workpiece clamping device as claimed in claim 1, wherein the open-close control mechanism comprises an open adjusting component and a close adjusting component, the open adjusting component is fixedly arranged at one end of the first swinging body and is matched with the sliding shaft of the rotating member to adjust the opening degree between the swinging bodies at two sides, the close adjusting component is fixedly arranged at the tail end of the first swinging body, and the close adjusting component is matched with the pin shaft to adjust the close angle between the swinging bodies at two sides.

9. The welding workpiece clamping device as claimed in claim 8, wherein the opening adjusting assembly comprises a fixing nut fixedly provided at a lower portion of one end of the first swinging body and perpendicular to the first swinging body, and a first adjusting bolt threadedly engaged with the fixing nut and adjusting a distance from a top of the first adjusting bolt to the sliding shaft by a screwed-in length of the first adjusting bolt.

10. The welding workpiece clamping device as claimed in claim 8, wherein the closing adjusting assembly comprises an adjusting body and a second adjusting bolt, the adjusting body is fixedly arranged at the tail end of the first swinging body, a screw hole is arranged at the center of the adjusting body, the central axis of the screw hole is parallel to the first swinging body, the second adjusting bolt is arranged in the screw hole, and the distance from the top of the second adjusting bolt to the front edge of the second swinging body is adjusted through the screwing length of the second adjusting bolt.

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