CN210383094U

CN210383094U - Guide control mechanism of pneumatic lifting table

Info

Publication number: CN210383094U
Application number: CN201920791112.1U
Authority: CN
Inventors: 张春勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-04-24
Anticipated expiration: 2029-05-29

Abstract

The utility model discloses a guiding control mechanism of pneumatic lift table, including the desktop backup pad, the lower plate, go up the fixed block, but air spring and wedge switch can be locked, it locates outside the air spring can be locked to go up the fixed block cover, but the both ends of air spring are connected respectively, the lower connecting plate, first straight line bearing sleeve is located outside first straight line optical axis and is installed in last fixed block, connecting plate is connected to first straight line optical axis one end, the other end is equipped with first cylinder coil spring, interior bushing connection lower plate and cover are located outside the lower connecting plate, outer bushing desktop backup pad and cover are located outside the upper connecting plate, wedge switch's inclined wedge face can support and press the valve thimble, make the direction motion that the lower plate was kept away from or is close to interior bushing relatively in. The utility model discloses compact structure, the direction precision is high, utilizes rotatable wedge switch ingenious control can lock the air spring, and cylindrical coil spring has solved the impact problem that can lock the air spring when rising to the end, and this direction control mechanism makes the desktop go up and down more smoothly, steady, is difficult for rocking.

Description

Guide control mechanism of pneumatic lifting table

Technical Field

The utility model relates to a house jacking equipment's technical field, more specifically relates to direction control mechanism of pneumatic lift table.

Background

The pneumatic lifting mechanism is widely applied to height-adjustable articles such as beds, chairs, tables and the like, and has the main function of linearly moving a load through self expansion and contraction. With the improvement of the requirements of people on living quality, the home with the lifting function can be developed rapidly.

The pneumatic lifting table on the market at present generally realizes the direction function with interior outer tube and with interior sleeve pipe matched with plane bearing, because of interior, outer tube is extruded or rolled by aluminum product or steel and is formed, and the plane precision of direction is relatively poor, and sleeve pipe and kingpin fit clearance are big, and the desktop produces very easily and rocks the phenomenon, and the kingpin size needs hierarchical assembly, and is very inconvenient, and the quality is also unstable. The dynamic bearing capacity of the pneumatic lifting table in the market is small, and once the supporting force of the air spring is too large, the table top can generate impact phenomenon when lifted to the top, so that the table top shakes, and further popularization of the pneumatic lifting table is limited.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a direction control mechanism of pneumatic lift table that direction precision is high, frictional resistance is little, have buffer function, and this direction control mechanism uses can avoid the desktop vibration phenomenon in the pneumatic lift table.

According to one aspect of the present invention, there is provided a guiding control mechanism for a pneumatic lifting table, comprising a table top supporting plate, a lower bottom plate, an upper fixing block, a lockable gas spring and a wedge switch, wherein the upper fixing block is sleeved outside a cylinder of the lockable gas spring, a lower connecting plate is arranged at the bottom of the cylinder of the lockable gas spring, an upper connecting plate is arranged at the end of a piston rod of the lockable gas spring, a first linear bearing is arranged in the upper fixing block, a first linear optical axis matched with the first linear bearing is arranged in the first linear bearing, the upper end of the first linear optical axis is connected with the upper connecting plate, a first cylindrical helical spring is sleeved at the lower end of the first linear optical axis to offset the impact force of the lockable gas spring, an inner sleeve is arranged on the lower connecting plate, the inner sleeve is connected to the lower bottom plate, the outer sleeve is, the wedge surface of the wedge switch is positioned above the valve thimble of the lockable gas spring and can be pressed against the valve thimble, and when the wedge surface of the wedge switch is pressed against the valve thimble, the outer sleeve can move relative to the inner sleeve in the direction away from or close to the lower base plate.

Therefore, the wedge-shaped switch can rotate around the center of the wedge-shaped switch, the valve ejector pin of the lockable gas spring can be pressed by the wedge surface below the wedge-shaped switch to control the extension and retraction of the lockable gas spring, and the control mode has the advantages of simple structure and low manufacturing cost; when a valve thimble of the lockable gas spring is pressed down, a piston rod of the lockable gas spring extends, the upper connecting plate and the outer sleeve pipe ascend under the guiding action of the first linear bearing and the first linear optical axis, the table top is connected to a table top supporting plate on the outer sleeve pipe, and the table top ascends along with the outer sleeve pipe; when the table top rises to a required height, the wedge-shaped switch is rotated, the valve ejector pin of the lockable gas spring is reset upwards, the position of the piston rod of the lockable gas spring is locked and fixed, the table top can be stopped at any height, and the table top can bear a large pressing load; if the piston rod of the lockable gas spring extends to the tail end, the first cylindrical spiral spring is arranged on the first linear optical axis and can offset the impact force of the lockable gas spring, so that the table top can be stably lifted and locked; when the desktop is required to descend, the wedge-shaped switch is rotated to enable the valve ejector pin of the lockable gas spring to be pressed down, a user presses down the desktop by hand, the piston rod of the lockable gas spring retracts due to the force exerted by the hand, the upper connecting plate and the outer sleeve descend under the guiding action of the first linear bearing and the first linear optical axis, when the desktop descends to a required height, the wedge-shaped switch is rotated, the valve ejector pin of the lockable gas spring resets upwards, the position of the piston rod of the lockable gas spring is locked, and the desktop can stop. Adopt linear bearing and straight line optical axis to cooperate, compare in plane bearing, linear bearing has the friction with straight line optical axis little, and the stable advantage of motion, can obtain the linear motion that sensitivity is high, the precision is high, but including being equipped with the impact force that first cylindrical helical spring can offset the lockable air spring, vibration phenomenon when having avoided the desktop to rise to the top.

In some embodiments, the wedge switch is connected with the control part, the control part includes the cable, the switch body and switch spanner, the switch body is installed and is drawn the index guide holder, switch spanner's one end rotatable coupling is internal in the switch, wedge switch is connected to the one end of cable, the other end of cable passes and draws the index guide holder and be connected with switch spanner, when switch spanner is in the stress state, the cable drives the wedge switch and rotates so that can lock the direction motion that air spring drive outer tube kept away from or was close to the lower plate for interior sleeve pipe. Therefore, when the switch wrench is pulled, the switch wrench rotates in the switch body, the stay cable is pulled to enable the stay cable to be tightened, the wedge-shaped switch rotates around the center of the wedge-shaped switch, the wedge surface of the wedge-shaped switch abuts against the valve ejector pin of the lockable gas spring, the lockable gas spring is opened, the piston rod of the lockable gas spring indirectly drives the tabletop to ascend in an extending mode, if pressure is applied to the tabletop by hands in an opening state of the lockable gas spring, the piston rod of the lockable gas spring can retract, and therefore the tabletop is driven to descend. When the switch wrench is loosened, the stay cable is loosened, the wedge-shaped switch rotates back under the action of the upward resetting action force of the valve ejector pin of the lockable gas spring, the valve ejector pin rises and can be locked by the lockable gas spring, and at the moment, the lockable gas spring can bear larger downward action force. When the piston rod of the lockable gas spring extends to the tail end, the first cylindrical spiral spring can counteract the impact force of the lockable gas spring, so that the table top is prevented from vibrating, and the table top is stably lifted and locked.

In some embodiments, two or three sets of first linear optical axes are provided, and the first linear bearings matched with the first linear optical axes and the first cylindrical helical springs sleeved on the first linear optical axes are consistent with the first linear optical axes in number. From this, first straight line optical axis and first straight line bearing constitute guiding mechanism, adopt two sets of or three guiding mechanism to accomplish the direction of desktop lift in-process for the lift of desktop is more steady, can bear bigger axial force and yawing force.

In some embodiments, the upper fixing block is fixedly connected to the inner side of the inner sleeve, a spring seat is arranged at the free end of the first linear optical axis, one end of the first cylindrical helical spring is mounted on the spring seat, and the other end of the first cylindrical helical spring is free. From this, first cylinder coil spring easy dismounting is convenient for debugging and later maintenance.

In some embodiments, the wedge switch is provided with a rotating shaft at the center, and the rotating shaft is rotatably connected with the upper connecting plate.

In some embodiments, the device further comprises a middle sleeve, an outer step tube, a lower fixing block, an upper supporting rod and a lower supporting rod, wherein the cylinder barrel of the lockable gas spring is arranged in the outer step tube, the upper fixing block and the lower fixing block are respectively arranged at the upper end and the lower end of the outer step tube, the upper fixing block and the lower fixing block are respectively provided with an upper pulley and a lower pulley, an annular rope is sleeved between the upper pulley and the lower pulley, two sides of the annular rope are respectively provided with a first connecting block and a second connecting block, the first connecting block is connected with the lower end of the upper supporting rod, the upper end of the upper supporting rod is connected with an upper connecting plate, the second connecting block is connected with the upper end of the lower supporting rod, the lower end of the lower supporting rod is connected with a lower base plate, the lower fixing block is internally provided with a second linear bearing, the second linear bearing is internally provided with a second linear optical axis matched with the second, the second cylindrical spiral spring is positioned above the second linear bearing, the middle sleeve is connected with the upper fixing block, and the inner sleeve, the middle sleeve and the outer sleeve are distributed from inside to outside.

Therefore, the outer sleeve, the middle sleeve and the inner sleeve form a three-layer sleeve, the bottom of the inner sleeve is connected to the lower bottom plate, the upper end of the middle sleeve is connected with the upper fixing block, and the top of the outer sleeve is connected to the desktop supporting plate; when a valve ejector pin of the lockable gas spring is pressed down, a piston rod of the lockable gas spring extends, an upper connecting plate and an outer sleeve are lifted to drive an upper supporting rod arranged on the upper connecting plate to ascend, a first connecting block is lifted to drive an annular rope to rotate, a second connecting block descends, a lower bottom plate is pushed by a lower supporting rod to descend, an inner sleeve also descends, when the required height is reached, the lockable gas spring is locked by rotating the wedge switch, and at the moment, a table top can bear a larger load; if the piston rod of the lockable gas spring extends to the tail end, the first cylindrical helical spring on the first linear optical axis and the second cylindrical helical spring on the second linear optical axis can respectively counteract the impact force in the upper direction and the lower direction, so that the table top vibration phenomenon is avoided; when the desktop is required to descend, the wedge switch is rotated to enable the valve ejector pin of the lockable gas spring to be pressed down, a user presses the desktop with a hand, due to the downward force exerted by the hand, the piston rod of the lockable gas spring retracts, the upper connecting plate and the outer sleeve descend to drive the upper supporting rod to descend, the position of the first connecting block descends to drive the annular rope to rotate, the second connecting block ascends and drives the lower base plate to ascend through the lower supporting rod, so that the inner sleeve is retracted into the middle sleeve, the middle sleeve is accommodated in the outer sleeve, when the desktop descends to a required position, the wedge switch rotates back under the upward resetting acting force of the valve ejector pin of the lockable gas spring, the valve ejector pin ascends, the lockable gas spring is locked, and the operation. The rotation of the wedge-shaped switch is controlled by rotating the switch wrench of the control part to drive the tightness of the inhaul cable, and the wedge surface of the wedge-shaped switch can control the opening or closing of a valve ejector pin of the lockable gas spring so as to control the stretching and locking of the lockable gas spring.

In some embodiments, the upper fixing block and the lower fixing block are connected by a long screw. From this, install in the last fixed block and the lower fixed block at outer step pipe both ends, the rethread long screw rod is fixed upper and lower fixed block, ensures at the in-process that goes up and down, the stability of whole equipment.

In some embodiments, the upper fixing block is provided with a second linear optical axis abdicating hole, and the lower fixing block is provided with a first linear optical axis abdicating hole. Therefore, the linear optical axis abdicating holes are formed in the upper fixing block and the lower fixing block, so that when the lifting table is pressed to the lowest position, the linear optical axes can be accommodated in the linear optical axis abdicating holes of the upper fixing block and the lower fixing block, the lifting stroke can be increased under the condition that the total height of the lifting table is certain, the requirement of people on the lifting height is met to the maximum extent, the length of the linear optical axes is guaranteed as far as possible, and the guide is guaranteed to be more stable while the lifting height is guaranteed.

In some embodiments, the first linear optical axis and the first linear bearing are provided in one set, and the second linear optical axis and the second linear bearing are provided in two sets. From this, the upper portion, first straight line optical axis and the piston rod that can lock the air spring play the guide effect jointly, and lower part, two second straight line optical axes play the guide effect jointly, go up and down steadily in the same direction as smooth no jamming.

In some embodiments, the lockable gas spring is located at the center of the upper fixing block, the upper fixing block and the lower fixing block are respectively provided with mounting grooves for the upper pulley and the lower pulley, the two sets of second linear optical axes are symmetrically arranged relative to the lockable gas spring, and the first linear optical axis and the annular rope are symmetrically arranged relative to the lockable gas spring. Therefore, the lockable gas spring, the annular rope and the positions of the first and second linear optical axes are reasonably arranged, so that the guide control mechanism is more compact in structure, and the space is saved.

Compared with the prior art, the beneficial effects of the utility model are that: the guide control mechanism of the pneumatic lifting table provided by the utility model has compact structure, adopts the linear bearing and the linear optical axis to replace the plane needle bearing on the traditional product, and has small friction resistance and high guide precision; the opening and the locking of the lockable gas spring are skillfully controlled by combining the inclined wedge surface of the rotatable wedge switch with the inhaul cable, and the wedge switch has small size and low cost; no matter two sections of the inner sleeve and the outer sleeve are lifted or three sections of the inner sleeve, the middle sleeve, the outer sleeve and the outer sleeve are lifted, a first cylindrical spiral spring or a second cylindrical spiral spring is arranged on a first linear optical axis or a second linear optical axis, when the lockable gas spring extends to the tail end of a stroke, the cylindrical spiral spring is compressed, acting force opposite to the lockable gas spring is generated, the rising resultant force of a table top is gradually reduced, and the problem of impact when the lockable gas spring rises to the tail end is solved; the impact force at the tail end of the lockable gas spring can be counteracted by the cylindrical spiral spring, so that the force value of the lockable gas spring can be increased, and the supporting force of the pneumatic lifting table is increased; in order to solve the problem that a part of users press down difficultly under light load, the lower part of the desktop is provided with the matching balancing weight, and the users can select the balancing weight with proper weight according to the weight of articles placed on the desktop, so that the lifting operation is always in a comfortable state.

Drawings

FIG. 1 is a schematic perspective view of an embodiment 1 of a guide control mechanism of a pneumatic elevating table;

FIG. 2 is a schematic view of the structure of FIG. 1;

FIG. 3 is a schematic view of the internal structure of FIG. 1;

FIG. 4 is a schematic structural view in a lowered state of embodiment 1;

FIG. 5 is a schematic structural view in the raised state of embodiment 1;

FIG. 6 is a schematic view showing the connection of the lockable gas spring, the wedge switch and the operation member in embodiment 1;

FIG. 7 is a schematic structural view of embodiment 2 of a guide control mechanism of the pneumatic elevating table;

FIG. 8 is a schematic view showing a distribution structure of a first straight optical axis in embodiment 2;

FIG. 9 is a schematic structural view in a lowered state of embodiment 2;

FIG. 10 is a schematic structural view in a raised state of embodiment 2;

FIG. 11 is a schematic structural view of embodiment 3 of a guide control mechanism of the pneumatic elevating table;

FIG. 12 is a schematic view showing a distribution structure of a first straight optical axis of embodiment 3;

FIG. 13 is a schematic structural view in a lowered state of embodiment 3;

FIG. 14 is a schematic structural view in a raised state of embodiment 3;

FIG. 15 is an exploded view schematically showing embodiment 3;

fig. 16 is a schematic diagram of the structure of a wedge switch.

Detailed Description

The present invention will be further described with reference to the following embodiments.

Example 1

As shown in fig. 1 to 3, the guiding control mechanism of the pneumatic lifting table according to an embodiment of the present invention includes a table top supporting plate 11, a lower bottom plate 21, an upper fixing block 31, a lockable gas spring 4 and a wedge switch 5. The shape structure of the upper fixing block 31 may be a rectangular structure or a circular structure, and the rectangular structure is adopted in this embodiment. The upper fixing block 31 is fixedly sleeved on the upper end of the cylinder 41 of the lockable gas spring 4, the bottom of the cylinder 41 of the lockable gas spring 4 is connected with the lower connecting plate 22 and locked by a nut, and the upper end part of the piston rod 42 of the lockable gas spring 4 is fixedly connected with the upper connecting plate 12. A first linear bearing 311 is fixedly installed in the upper fixing block 31, and a first linear optical shaft 312 engaged with the first linear bearing 311 is installed in the first linear bearing 311. The first linear bearing 311 may be of a standard type or an elongated type. The upper end of the first linear optical axis 312 is connected to the lower portion of the upper connecting plate 12 by a screw or a weld nut, and the lower end of the first linear optical axis 312 is sleeved with a first cylindrical helical spring 313 to counteract the impact force of the lockable gas spring 4. The first cylindrical coil spring 313 is formed by winding a quenched steel wire. The outer cover of the lower connecting plate 22 is provided with an inner sleeve 6 and is welded and fixed, the bottom of the inner sleeve 6 is connected to the lower bottom plate 21, the side wall of the upper fixing block 31 is provided with a fixing hole 310, and the upper fixing block 31 is connected to the inner side of the inner sleeve 6 and is fixed in the fixing hole 310 through screw locking. The outer sleeve 7 is arranged on the outer cover of the upper connecting plate 12 and is welded and fixed, the desktop supporting plate 11 is arranged on the top of the outer sleeve 7 and is welded and fixed, and the inner sleeve 6 is sleeved on the outer sleeve 7. The wedge switch 5 is rotatably mounted on the upper connecting plate 12, specifically, the upper connecting plate 12 is mounted with the backing plate 13, the center of the wedge switch 5 is mounted with the rotating shaft 52, and the rotating shaft 52 is rotatably connected to the connecting plate 12. In order to facilitate fine adjustment of the height, a backing plate 13 may be added between the upper connecting plate 12 and the wedge switch 5. The backing plate 13 is provided with a through hole for the end of the piston rod 42 of the lockable gas spring 4 and the valve needle 43 to pass through, and the wedge surface 51 of the wedge switch 5 is located above the valve needle 43 of the lockable gas spring 4 and can press against the valve needle 43. When the wedge surface 51 of the wedge switch 5 presses against the valve needle 43, the lockable gas spring 4 extends or compresses, and the outer sleeve 7 can move in a direction away from or close to the lower base plate 21 relative to the inner sleeve 6 under the guiding action of the linear bearing 311 and the linear optical axis 312.

For controlling the wedge switch 5, the wedge switch 5 is connected with a control member 9. As shown in fig. 6, the manipulation member 9 includes a cable 91, a switch body 92, and a switch wrench 93. The switch body 92 is provided with a pull index guide seat 94, one end of a switch wrench 93 is rotatably connected in the switch body 92, one end of a pull cable 91 is connected with the joint 53 of the wedge switch 5, and the other end of the pull cable 91 passes through the pull index guide seat 94 to be connected with the switch wrench 93. As shown in fig. 16, the wedge surface 51 of the wedge switch 5 is a spiral curved surface, and the wedge switch 5 is provided with a vertical arc groove 531 and a horizontal groove 532 to form a joint 53. When the switch wrench 93 is under a force, the pull cable 91 rotates the wedge switch 5 to extend or compress the lockable gas spring 4, so as to drive the outer sleeve 7 to move relative to the inner sleeve 6 in a direction away from or close to the lower base plate 21. Specifically, when the switch wrench 93 is pulled, the switch wrench 93 rotates in the switch body 92, the pulling cable 91 is pulled to tighten the pulling cable 91, the wedge switch 5 rotates around the center thereof, the wedge surface 51 of the wedge switch 5 presses against the valve needle 43 of the lockable gas spring 4, the lockable gas spring 4 is opened, and the piston rod 42 of the lockable gas spring 4 extends to indirectly drive the tabletop 100 to ascend. If pressure is applied to the table top 100 by hand in the opened state of the lockable gas spring 4, the piston rod 42 of the lockable gas spring 4 can be retracted to drive the table top 100 to descend. When the switch wrench 93 is loosened, the cable 91 is loosened, the wedge switch 5 rotates back under the action of the upward resetting force of the valve thimble 43 of the lockable gas spring 4, the valve thimble 43 rises, the lockable gas spring 4 is locked, and at the moment, the lockable gas spring 4 can bear a larger downward action force. When the piston rod 42 of the lockable gas spring 4 extends to the end, the first cylindrical coil spring 313 can counteract the impact force when the lockable gas spring 4 extends to the end, so as to avoid the vibration of the table top 100, and to stably lift and lock the table top 100.

A spring seat 314 is mounted on a free end of the first linear optical axis 312 by a screw, one end of a first cylindrical coil spring 313 is mounted on the spring seat 314, and the other end of the first cylindrical coil spring 313 is free. First cylindrical helical spring 313 easy dismounting, the debugging and the later maintenance of being convenient for.

In order to solve the problem that some users press down difficultly under light load, an optional counterweight 101 is arranged below the tabletop 100, and the optional counterweight 101 is arranged below the tabletop support plate 11. The user can select the balancing weight 101 with proper weight according to the weight of the articles placed on the tabletop 100, so that the lifting is always in a comfortable state.

Working process of the embodiment 1:

as shown in fig. 4 and 5, when the tabletop 100 needs to be lifted, the switch wrench 93 is pulled, the switch wrench 93 rotates in the switch body 92, the pulling cable 91 is pulled to tighten the pulling cable 91, the wedge switch 5 rotates around the central rotating shaft 52, the wedge surface 51 of the wedge switch 5 presses against the valve thimble 43 of the lockable gas spring 4, the valve thimble 43 of the lockable gas spring 4 is pressed, the lockable gas spring 4 is opened, the piston rod 42 of the lockable gas spring 4 extends to push the upper connecting plate 12 to move upward, under the guiding action of the first linear bearing 311 and the first linear optical shaft 312, the upper connecting plate 12 and the outer sleeve 7 are lifted, the tabletop 100 is connected to the tabletop support plate 11 on the outer sleeve 7, the outer sleeve 7 moves relative to the inner sleeve 6 in a direction away from the lower base plate 21, and the tabletop 100 ascends along with the outer sleeve 7. When the table top 100 is lifted to a required height, the switch wrench 93 is loosened, the pull cable 91 is loosened, the wedge switch 5 rotates back under the action of the upward resetting force of the valve ejector pin 43 of the lockable gas spring 4, the valve ejector pin 43 is lifted, the position of the piston rod 42 of the lockable gas spring 4 is locked, the table top 100 stops lifting, the table top 100 can stop at any height, and at the moment, the lockable gas spring 4 can bear a large downward action force. If the piston rod 42 of the lockable gas spring 4 extends to the end, since the first cylindrical coil spring 313 is installed on the first linear optical axis 312, the first cylindrical coil spring 313 can counteract the impact force of the lockable gas spring 4, so that the table top 100 can be smoothly lifted and locked.

When the desktop 100 is required to descend, the switch wrench 93 is pulled, the pull cable 91 is pulled to tighten the pull cable 91, the wedge switch 5 rotates around the central rotating shaft 52, the wedge surface 51 of the wedge switch 5 abuts against the valve ejector pin 43 of the lockable gas spring 4, at this time, when the lockable gas spring 4 is in an open state, pressure is applied to the desktop 100 by hand, the piston rod 42 of the lockable gas spring 4 retracts to drive the upper connecting plate 12 to move downwards, under the guiding action of the first linear bearing 311 and the first linear optical shaft 312, the upper connecting plate 12 and the outer sleeve 7 descend, the outer sleeve 7 moves towards the direction close to the lower bottom plate 21 relative to the inner sleeve 6, and the desktop 100 is driven to descend. When the table top 100 is lowered to a required height, the switch wrench 93 is loosened, the valve ejector pin 43 of the lockable gas spring 4 is reset upwards, the wedge switch 5 rotates, the position of the piston rod 42 of the lockable gas spring 4 is locked, and the table top 100 can be stopped.

Example 2

As shown in fig. 7 and 8, embodiment 2 differs from embodiment 1 only in that three sets of guides for the first linear optical axis 312 are provided. Specifically, the first linear optical axis 312 has three sets, the first linear bearings 311 engaged with the first linear optical axis 312 and the first cylindrical helical spring 313 sleeved on the first linear optical axis 312 have three sets, and on the upper fixing base, the three sets of first linear bearings 311 are uniformly distributed centering on the lockable gas spring 4. In practical applications, the guiding mechanism may also be two sets, that is, two sets are provided for each of the first linear optical axis 312, the first linear bearing 311 and the first cylindrical coil spring 313. In this embodiment, the upper fixing block 31 is of a circular structure, and the upper free end of the first cylindrical helical spring 313 is also clamped with a spring seat 314. The first linear light shaft 312 and the first linear bearing 311 form a guiding mechanism, and three groups of guiding mechanisms are adopted to complete guiding in the lifting process of the table top 100, so that the lifting of the table top 100 is more stable. Fig. 9 and 10 show the ascending and descending states of the present embodiment, and the working process of the present embodiment is the same as that of embodiment 1.

Example 3

As shown in fig. 11, 12 and 15, the guiding control mechanism of the pneumatic lifting table according to an embodiment of the present invention includes a table top supporting plate 11, a lower bottom plate 21, an upper fixing block 31, a lower fixing block 32, an outer step tube 44, a lockable gas spring 4, a wedge switch 5, an outer sleeve 7, a middle sleeve 8, an inner sleeve 6, an upper supporting rod 315 and a lower supporting rod 325. In this embodiment, the external structures of the upper fixing block 31 and the lower fixing block 32 are cylindrical structures.

The cylinder 41 of the lockable gas spring 4 is arranged in the outer step pipe 44, steps are arranged at the upper end and the lower end of the outer step pipe 44, and the upper fixing block 31 and the lower fixing block 32 are respectively arranged on the steps at the upper end and the lower end of the outer step pipe 44. The upper fixing blocks 31 and the lower fixing blocks 32 which are arranged at the two ends of the outer step pipe 44 are connected through four long screw rods 33, and the two ends of each long screw rod 33 are locked through nuts, so that the stability of the whole equipment can be ensured in the lifting process. The bottom of the cylinder 41 of the lockable gas spring 4 is connected with a lower connecting plate 22 and locked by a nut, and the upper end of the piston rod 42 of the lockable gas spring 4 is fixedly connected with an upper connecting plate 12. A first linear bearing 311 is fixedly installed in the upper fixing block 31, and a first linear optical shaft 312 engaged with the first linear bearing 311 is installed in the first linear bearing 311. The upper end of the first linear optical shaft 312 is connected to the lower portion of the upper connecting plate 12 by a screw or a weld nut, and the free end of the first linear optical shaft 312 is sleeved with a first cylindrical helical spring 313 to counteract the impact force when the lockable gas spring 4 extends to the tail end. The lower fixing block 32 is fixedly provided with a second linear bearing 321, a second linear optical axis 322 matched with the second linear bearing 321 is arranged in the second linear bearing 321, and the lower end of the second linear optical axis 322 penetrates through the lower connecting plate 22 to be connected with the lower bottom plate 21 through a screw or a welding nut. A second cylindrical coil spring 323 is sleeved outside the second linear optical axis 322, and the second cylindrical coil spring 323 is located above the second linear bearing 321. The upper fixing block 31 and the lower fixing block 32 are respectively provided with an upper pulley 301 and a lower pulley 302, and an annular rope 303 is sleeved between the upper pulley 301 and the lower pulley 302. The both sides of looped rope 303 are equipped with first connecting block 304 and second connecting block 305 respectively, and the lower extreme of upper support pole 315 is connected to first connecting block 304, and upper connecting plate 12 is connected through the screw in the upper end of upper support pole 315, and the upper end of lower support pole 325 is connected to second connecting block 305, and the lower extreme of lower support pole 325 passes through screwed connection bottom plate 21.

The inner sleeve 6, the middle sleeve 8 and the outer sleeve 7 are distributed from inside to outside to form a three-layer sleeve. Specifically, an inner sleeve 6 is covered on the lower connecting plate 22, and the bottom of the inner sleeve 6 is fixedly connected to the lower bottom plate 21; the upper end of the middle sleeve 8 is connected and fixed with the upper fixing block 31, and a gap is formed between the upper fixing block 31 and the middle sleeve 8, so that the inner sleeve 6 is accommodated in the gap in a descending state; the outer sleeve 7 is arranged and fixed outside the upper connecting plate 12, the inner sleeve 6 is sleeved outside the outer sleeve 7, and the desktop supporting plate 11 is arranged and fixed at the top of the outer sleeve 7. The wedge switch 5 is rotatably mounted on the upper connecting plate 12, specifically, a rotating shaft 52 is mounted at the center of the wedge switch 5, the rotating shaft 52 is rotatably connected to the upper connecting plate 12, a threaded hole for fixing the end of the piston rod 42 of the lockable gas spring 4 is formed in the upper connecting plate 12, and an inclined wedge surface 51 of the wedge switch 5 is located above the valve thimble 43 of the lockable gas spring 4 and can press against the valve thimble 43. When the wedge surface 51 of the wedge switch 5 presses against the valve needle 43, the lockable gas spring 4 performs an extension or compression movement, and the outer sleeve 7 can move relative to the inner sleeve 6 in a direction away from or close to the lower base plate 21.

For controlling the wedge switch 5, the wedge switch 5 is connected with a control member 9. The control member 9 in this embodiment has the same structure as that in embodiment 1, and as shown in fig. 6 and 15, the control member 9 includes a cable 91, a switch body 92, and a switch wrench 93. The switch body 92 is provided with a pull index guide seat 94, one end of a switch wrench 93 is rotatably connected in the switch body 92, one end of a pull cable 91 is connected with the wedge switch 5, and the other end of the pull cable 91 passes through the pull index guide seat 94 to be connected with the switch wrench 93.

In this embodiment, the first linear optical axis 312, the first linear bearing 311, and the first cylindrical coil spring 313 are provided in one set, and the second linear optical axis 322, the second linear bearing 321, and the second cylindrical coil spring 323 are provided in two sets. The upper part, the first linear optical axis 312 and the piston rod 42 of the lockable gas spring 4 play a role in guiding together, and the lower part, the two second linear optical axes 322 play a role in guiding together, so that the lifting is stable and smooth without clamping stagnation. The lockable gas spring 4 is located at the center of the upper fixed block 31, the upper fixed block 31 and the lower fixed block 32 are respectively provided with the mounting grooves 34 of the upper pulley 301 and the lower pulley 302, the two groups of second linear optical axes 322 are symmetrically arranged relative to the lockable gas spring 4, and the first linear optical axis 312 and the annular rope 303 are symmetrically arranged relative to the lockable gas spring 4. The lockable gas spring 4, the annular rope 303, the first linear optical axis 322 and the second linear optical axis 322 are reasonably arranged, so that the guide control mechanism is more compact in structure, and the space is saved. The first cylindrical coil spring 313 and the second cylindrical coil spring 323 are wound from quenched steel wire. The annular rope 303 is made of steel wire rope or steel belt. In practical applications, the first linear optical axis 312 and the first linear bearing 311, and the second linear optical axis 322 and the second linear bearing 321 may be replaced by linear guide rails and sliders.

The upper fixing block 31 is provided with two second linear optical axis yielding holes 316, and the lower fixing block 32 is provided with a first linear optical axis yielding hole 326. The linear optical axis abdicating holes are formed in the upper fixing block 31, the lower fixing block 32, and the linear optical axis abdicating holes are formed in the upper fixing block 31, the lower fixing block 32, so that when the lifting table is pressed to the lowest position, the linear optical axis can be accommodated in the linear optical axis abdicating holes of the upper fixing block 31 and the lower fixing block 32, the lifting stroke can be increased under the condition that the total height of the lifting table is certain, the requirement of people on the lifting height is met to the maximum extent, the length of the linear optical axis is guaranteed as far as possible, and the guide is.

In this embodiment, an optional counterweight 101 may be disposed below the tabletop 100, and a user may select a counterweight 101 with a suitable weight according to the weight of the tabletop 100 on which the articles are placed, so that the lifting is always in a comfortable state.

Working process of this example 3:

as shown in fig. 13 and 14, when the tabletop 100 needs to be lifted, the switch wrench 93 is pulled, the switch wrench 93 rotates in the switch body 92, the pulling cable 91 is pulled to tighten the pulling cable 91, the wedge switch 5 rotates around the central rotating shaft 52, the wedge surface 51 of the wedge switch 5 presses against the valve thimble 43 of the lockable gas spring 4, the valve thimble 43 of the lockable gas spring 4 is pressed, the lockable gas spring 4 is opened, the piston rod 42 of the lockable gas spring 4 extends, and the upper connecting plate 12 is pushed to move upwards; under the guiding action of the first linear bearing 311 and the first linear optical axis 312, the outer sleeve 7 can be lifted upwards relative to the middle sleeve 8, the upper supporting rod 315 installed on the upper connecting plate 12 is driven to ascend, the first connecting block 304 is lifted upwards, so that the annular rope 303 is driven to rotate, meanwhile, the second connecting block 305 descends, the lower bottom plate 21 is pushed to descend through the lower supporting rod 325, the inner sleeve 6 moves downwards relative to the middle sleeve 8, the outer sleeve 7 and the inner sleeve 6 move towards two opposite directions respectively, three-section lifting is realized, and under the condition that the stroke of the lockable gas spring 4 is certain, the lifting height of the lifting table is greatly increased.

When the table top 100 is lifted to a required height, the switch wrench 93 is loosened, the pull cable 91 is loosened, the wedge switch 5 rotates back under the action of the upward resetting force of the valve ejector pin 43 of the lockable gas spring 4, the valve ejector pin 43 is lifted, the position of the piston rod 42 of the lockable gas spring 4 is locked, the table top 100 stops lifting, the table top 100 can stop at any height position, at the moment, the lockable gas spring 4 can bear a large downward action force, and the table top 100 can bear a large load. If the piston rod 42 of the lockable gas spring 4 extends to the end, the first cylindrical helical spring 313 on the first linear optical axis 312 and the second cylindrical helical spring 323 on the second linear optical axis 322 can counteract the impact force generated by the sudden stop of the gas spring, specifically, the first cylindrical helical spring 313 is compressed and abuts against the lower end surface of the upper fixed block 31, and the second cylindrical helical spring 323 is compressed and abuts against the upper end surface of the lower fixed block 32, so that the vibration phenomenon of the table top 100 is avoided.

When the table top 100 needs to be lowered, the wedge switch 5 is rotated to press down the valve ejector pin 43 of the lockable gas spring 4, a user presses down the table top 100 by hand, due to the force exerted by hand, the piston rod 42 of the lockable gas spring 4 retracts, the upper connecting plate 12 and the outer sleeve 7 descend to drive the upper supporting rod 315 to descend, the first connecting block 304 descends to drive the annular rope 303 to rotate, the second connecting block 305 ascends to drive the lower bottom plate 21 to ascend through the lower supporting rod 325, so that the inner sleeve 6 is retracted into the middle sleeve 8, the middle sleeve 8 is accommodated in the outer sleeve 7, when the table top 100 descends to a required position, the wedge switch 5 rotates back under the action of the upward reset force of the valve ejector pin 43 of the lockable gas spring 4, the valve ejector pin 43 ascends, the lockable gas spring 4 is locked, and the operation is. When the lifting table is pressed down to the lowest position, the linear optical axis can be accommodated in the linear optical axis abdicating holes of the upper and lower fixing blocks 31 and 32.

The utility model provides a direction control mechanism of pneumatic lift table mainly is applied to two solar terms and moves lift table, the pneumatic lift table of three section, the pneumatic lift table of both legs, pneumatic lift tatami, children study table, computer elevating platform, the pneumatic lift table of car as a house, laboratory test bench and other house products. The guide control mechanism of the pneumatic lifting table is compact in structure, a linear bearing and a linear optical axis are adopted to be matched to replace a planar needle bearing on a traditional product, the friction resistance is small, and the guide precision is high. The opening and the locking of the lockable gas spring 4 are skillfully controlled by the wedge surface 51 of the rotatable wedge switch 5 in combination with the inhaul cable 91, and the wedge switch 5 has small size and low cost. No matter two-section lifting of the inner and outer sleeves 7 or three-section lifting of the inner, middle and outer sleeves 7, the first or second cylindrical helical spring 323 is mounted on the first or second linear optical axis 322, when the lockable gas spring 4 extends to the end of the stroke, the cylindrical helical spring is compressed, an acting force opposite to that of the lockable gas spring 4 is generated, the resultant force of the lifting of the table top 100 is gradually reduced, and the impact problem when the lockable gas spring 4 rises to the end is solved. The impact force at the tail end of the lockable gas spring 4 can be offset by the cylindrical spiral spring, so that the force value of the lockable gas spring 4 can be increased, the supporting force of the pneumatic lifting table is increased, the lifting structure with the buffer spring solves the problem of small dynamic bearing capacity of the pneumatic lifting table, and the application field of the pneumatic lifting table is widened.

The foregoing is only a partial description of the present invention, and it should be understood that various other modifications, improvements and equivalents may be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The guide control mechanism of the pneumatic lifting table is characterized by comprising a table top supporting plate (11), a lower bottom plate (21), an upper fixing block (31), a lockable gas spring (4) and a wedge-shaped switch (5), wherein the upper fixing block (31) is sleeved outside a cylinder barrel of the lockable gas spring (4), a lower connecting plate (22) is arranged at the bottom of the cylinder barrel of the lockable gas spring (4), an upper connecting plate (12) is arranged at the end part of a piston rod of the lockable gas spring (4), a first linear bearing (311) is arranged in the upper fixing block (31), a first linear optical axis (312) matched with the first linear optical axis is arranged in the first linear bearing (311), the upper end of the first linear optical axis (312) is connected with the upper connecting plate (12), a first cylindrical spiral spring (313) is sleeved at the lower end of the first linear optical axis (312) to offset the impact force of the lockable gas spring (4), lower junction plate (22) dustcoat is equipped with interior sleeve pipe (6), interior sleeve pipe (6) is connected on lower plate (21), upper junction plate (12) dustcoat is equipped with outer tube (7), the top of outer tube (7) is located in desktop backup pad (11), wedge switch (5) are rotatable to be installed in upper junction plate (12), wedge face (51) of wedge switch (5) are located valve thimble (43) top that can lock air spring (4) and can support and press valve thimble (43), and when wedge face (51) of wedge switch (5) supported and pressed valve thimble (43), the direction motion that lower plate (21) was kept away from or was close to in interior sleeve pipe (6) relatively in outer tube (7).

2. The guidance control mechanism for a pneumatic elevating table as claimed in claim 1, the wedge-shaped switch (5) is connected with a control piece (9), the control piece (9) comprises a guy cable (91), a switch body (92) and a switch wrench (93), the switch body (92) is provided with a pull index guide seat (94), one end of the switch wrench (93) is rotatably connected in the switch body (92), one end of the inhaul cable (91) is connected with the wedge-shaped switch (5), the other end of the inhaul cable (91) penetrates through the pull index guide seat (94) to be connected with the switch wrench (93), when the switch wrench (93) is in a stressed state, the stay cable (91) drives the wedge switch (5) to rotate so that the lockable gas spring (4) drives the outer sleeve (7) to move relative to the inner sleeve (6) in a direction away from or close to the lower bottom plate (21).

3. The guiding control mechanism of the pneumatic lifting table as claimed in claim 2, wherein the number of the first linear optical axis (312) is two or three, and the number of the first linear bearing (311) engaged with the first linear optical axis (312) and the number of the first cylindrical helical spring (313) sleeved on the first linear optical axis (312) are the same as the number of the first linear optical axis (312).

4. The guiding control mechanism of the pneumatic lifting table as claimed in claim 1 or 3, wherein the upper fixing block (31) is fixedly connected to the inner side of the inner sleeve (6), a spring seat (314) is arranged at the free end of the first linear optical axis (312), one end of the first cylindrical helical spring (313) is mounted on the spring seat (314), and the other end of the first cylindrical helical spring (313) is free.

5. A guide control mechanism of a pneumatic lifting table as claimed in claim 4, wherein the wedge switch (5) is provided with a rotating shaft (52) at the center, and the rotating shaft (52) is rotatably connected to the upper connecting plate (12).

6. The guide control mechanism of the pneumatic lifting table according to claim 1 or 2, further comprising a middle sleeve (8), an outer step pipe (44), a lower fixing block (32), an upper support rod (315) and a lower support rod (325), wherein the cylinder of the lockable gas spring (4) is disposed in the outer step pipe (44), the upper fixing block (31) and the lower fixing block (32) are respectively mounted at the upper end and the lower end of the outer step pipe (44), the upper fixing block (31) and the lower fixing block (32) are respectively mounted with an upper pulley (301) and a lower pulley (302), an annular rope (303) is sleeved between the upper pulley (301) and the lower pulley (302), a first connecting block (304) and a second connecting block (304) are respectively arranged at two sides of the annular rope (303), the first connecting block (304) is connected with the lower end of the upper support rod (315), the upper end of the upper support rod (315) is connected with the upper connecting plate (12), the upper end of lower carriage (325) is connected in second connecting block (305), lower plate (21) is connected to the lower extreme of lower carriage (325), be equipped with second linear bearing (321) down in fixed block (32), be equipped with in second linear bearing (321) with it complex second straight line optical axis (322), the lower extreme of second straight line optical axis (322) passes lower connecting plate (22) and is connected with lower plate (21), second straight line optical axis (322) overcoat is equipped with second cylinder coil spring (323), second cylinder coil spring (323) are located second linear bearing (321) top, fixed block (31) is connected in well sleeve pipe (8), interior sleeve pipe (6), well sleeve pipe (8), outer tube (7) distribute from inside to outside.

7. The guiding control mechanism of pneumatic lifting table as claimed in claim 6, wherein the upper fixing block (31) is connected with the lower fixing block (32) by a long screw (33).

8. The guiding control mechanism of pneumatic lifting table as claimed in claim 7, wherein the upper fixing block (31) is provided with a second linear optical axis relief hole (316), and the lower fixing block (32) is provided with a first linear optical axis relief hole (326).

9. The mechanism of claim 6, wherein the first linear optical axis (312) and the first linear bearing (311) are provided in one set, and the second linear optical axis (322) and the second linear bearing (321) are provided in two sets.

10. The guiding control mechanism of pneumatic lifting table as claimed in claim 9, wherein the lockable gas spring (4) is located at the center of the upper fixing block (31), the upper fixing block (31) and the lower fixing block (32) are respectively provided with mounting grooves (34) for the upper pulley (301) and the lower pulley (302), two sets of the second linear optical axes (322) are symmetrically disposed with respect to the lockable gas spring (4), and the first linear optical axes (312) and the circular rope (303) are symmetrically disposed with respect to the lockable gas spring (4).