CN215974776U - Lifting device and car lifting jack using same - Google Patents

Abstract

The application relates to the technical field of vehicle maintenance equipment and discloses a lifting device and a car lifting jack using the lifting device, wherein the lifting device comprises a lead screw, a working nut in threaded connection with the lead screw, a connecting block detachably connected to the working nut and a driving lead screw rotation driving motor, the working nut drives the connecting block to synchronously move along the axial direction of the lead screw, the connecting block is used for being fixedly connected with a lifted piece, and the lifting device can achieve the effect of saving cost when the working nut is replaced by detachably manufacturing the working nut and the connecting block; the car lifting jack can achieve the effect of saving cost when the car lifting jack is maintained by applying the lifting device to the car lifting jack.

Description

Lifting device and car lifting jack using same

Technical Field

The application relates to the technical field of vehicle maintenance equipment, in particular to a lifting device and a car lifting jack using the same.

Background

Along with the vigorous development of rail transit, in order to ensure the safety of rail transit, after the rail vehicle runs for a period of time, the wheels in the bogie and other parts of the vehicle body need to be overhauled, the vehicle needs to be lifted to a certain height during maintenance, and at the moment, the vehicle needs to be lifted by using a vehicle lifting jack.

In the related art, for example, chinese patent publication No. CN105293362A discloses a synchronous lifting method for a driving unit based on a pressure sensor, the synchronous lifting system for a car lifting machine includes four movable car lifting machines, each movable car lifting machine includes a vertically arranged machine body, a bracket mechanism for lifting a car body and vertically arranged lead screw in the machine body, the lead screw is provided with a working nut in a matching manner, the working nut is fixedly connected to the bracket mechanism, and the bracket mechanism includes a bracket and a support head horizontally arranged in the bracket; the bracket comprises two side plates which are arranged oppositely and are parallel to each other and a supporting mechanism for connecting the side plates, the supporting head comprises two side plates which are arranged along the inner sides of the two side plates respectively, and one ends of the side plates, which face the working side of the car lifting jack, are connected with supporting blocks; the screw rod driving device further comprises a driving motor for driving the screw rod to rotate.

When the driving motor works, the driving motor drives the lead screw to rotate, the lead screw and the working nut rotate relatively, and then the working nut drives the bracket mechanism to move in the vertical direction, so that the bracket mechanism lifts the vehicle.

In view of the above-mentioned related technologies, the inventor believes that, due to the large mass of the vehicle, after the car lifting jack is used for a long time, the working nut is seriously worn by the lead screw, and then the threaded connection between the working nut and the lead screw is easy to fail, and at this time, the bracket mechanism needs to be replaced, and finally, the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

In order to alleviate the higher problem of cost of maintenance when changing work nut, the first purpose of this application provides a elevating gear.

The application provides a lifting device adopts following technical scheme:

the utility model provides a lifting device, includes that lead screw, threaded connection are at the work nut on the lead screw, can dismantle connecting block and the drive lead screw rotation driving motor of connection on the work nut, the work nut drives the axial synchronous motion of connecting block along the lead screw, the connecting block be used for with by lifting piece fixed connection.

Through adopting above-mentioned technical scheme, when using elevating gear, with the connecting block with by lifting piece fixed connection together, by the lifting piece can be bracket mechanism, then start driving motor, driving motor drives the lead screw, owing to be set up the restriction by lifting piece on the lifting piece by lifting piece pivoted locating part, so work nut can not follow the synchronous rotation of lead screw, work nut takes place relative rotation with the lead screw, then make work nut along the length direction motion of lead screw, thereby make work nut drive the connecting block motion, the connecting block is driving by the lifting piece motion, realize the elevating movement by the lifting piece promptly.

After the lifting device works for a long time, when the working nut needs to be replaced, the working nut is separated from the connecting block, then the working nut is unscrewed from the lead screw, a new working nut is screwed on the lead screw, and meanwhile, the working nut is connected with the connecting block, so that the replacement of the working nut is completed, the situation that parts except the working nut need to be replaced is reduced in the process, and the effect of reducing the maintenance cost of the lifting device is finally achieved.

Optionally, the top of the working nut is fixedly connected with a pre-pressing piece sleeved outside the screw rod, the radial cross section of the pre-pressing piece is polygonal, the bottom of the connecting block is provided with a clamping groove matched with the pre-pressing piece, and the pre-pressing piece is connected with the clamping groove in an inserting mode.

By adopting the technical scheme, when the screw rod rotates, the working nut cannot rotate along with the screw rod due to the matching of the pre-pressing piece and the clamping groove, and then the working nut and the screw rod rotate relatively, so that the working nut moves along the length direction of the screw rod, the working nut drives the connecting block to move, and the lifting of the lifted piece by the lifting device is realized; when changing work nut, separate connecting block and pre-compaction piece earlier, then unscrew work nut from the lead screw, on twisting the lead screw with new work nut again, make the pre-compaction piece plug-in simultaneously advance the joint groove, finally reached the effect of being convenient for change work nut.

Optionally, the side of the working nut near the top of the working nut is provided with a synchronizing rod, the bottom of the connecting block is provided with a synchronizing structure matched with the synchronizing rod, and the synchronizing rod and the synchronizing structure are matched to enable the connecting block and the working nut to move synchronously.

By adopting the technical scheme, when the screw rod rotates, the working nut cannot rotate along with the screw rod due to the matching of the synchronizing rod and the synchronizing structure, and then the working nut and the screw rod rotate relatively, so that the working nut moves along the length direction of the screw rod, the working nut drives the connecting block to move, and the lifting of the lifted piece by the lifting device is realized; when the working nut is replaced, the synchronizing rod is separated from the synchronizing structure, the working nut is unscrewed from the screw rod, a new working nut is screwed on the screw rod, meanwhile, the synchronizing rod and the synchronizing structure are mutually matched, and finally the effect of facilitating replacement of the working nut is achieved.

Optionally, the synchronizing structure includes an accommodating groove and a synchronizing groove which are all formed in the bottom of the connecting block, the synchronizing groove is communicated with the accommodating groove, one end of the top of the working nut is inserted into the accommodating groove, and the synchronizing rod is inserted into the synchronizing groove.

By adopting the technical scheme, when the screw rod rotates, the working nut cannot rotate along with the screw rod due to the matching of the synchronizing rod and the synchronizing groove, and then the working nut and the screw rod rotate relatively, so that the working nut moves along the length direction of the screw rod, the working nut drives the connecting block to move, and the lifting of the lifted piece by the lifting device is realized; when the working nut is replaced, the connecting block is separated from the working nut, so that the synchronizing rod is separated from the synchronizing groove, the working nut is unscrewed from the screw rod, a new working nut is screwed onto the screw rod, the synchronizing rod is inserted into the synchronizing groove, and finally the effect of facilitating replacement of the working nut is achieved.

Optionally, the synchronizing structure includes polylith joint piece, polylith the equal fixed connection of joint piece is in the bottom of connecting block, adjacent two have the clearance that holds the synchronizing bar between the joint piece, the synchronizing bar inserts in the clearance between two adjacent joint pieces.

By adopting the technical scheme, when the screw rod rotates, the synchronous rod and the clamping block are matched with each other, so that the working nut cannot rotate along with the screw rod, and then the working nut and the screw rod rotate relatively, so that the working nut moves along the length direction of the screw rod, the working nut drives the connecting block to move, and the lifting of the lifted piece by the lifting device is realized; when changing work nut, with connecting block and work nut separation, then unscrew work nut from the lead screw, on twisting the lead screw with new work nut again, make the synchronizing bar insert between two adjacent joint pieces simultaneously, finally reach the effect that the staff of being convenient for changed work nut.

Optionally, an insert rod is arranged between the working nut and the connecting block, and the insert rod is used for enabling the working nut and the connecting block to move synchronously.

By adopting the technical scheme, when the screw rod rotates, the working nut cannot rotate due to the matching of the inserted rod, the working nut and the connecting block, and then the working nut and the screw rod rotate relatively, so that the working nut moves along the length direction of the screw rod, the working nut drives the connecting block to move, and the lifting of the lifted piece by the lifting device is realized; when changing work nut, slide to the connecting block, the connecting block takes place relative slip with work nut, and the inserted bar separates with work nut or connecting block, then unscrews work nut from the lead screw, on twisting the lead screw with new work nut again, and the inserted bar links together connecting block and work nut simultaneously, accomplishes the change of work nut promptly, finally reaches the effect of being convenient for change work nut.

Optionally, threaded connection has safety nut on the lead screw, safety nut is located the one end that work nut deviates from the connecting block, safety nut and work nut interval set up.

Through adopting above-mentioned technical scheme, when the gravity of being lifted is great, can lead to work nut's wearing and tearing serious, make work nut's screw thread to become invalid easily then, directly drop on safety nut after work nut's screw thread became invalid, safety nut supports work nut, and then increases the security when staff uses elevating gear.

Optionally, a linkage rod is slidably connected between the working nut and the safety nut, and the linkage rod is used for enabling the working nut and the safety nut to move synchronously.

By adopting the technical scheme, after the working nut fails, the working nut moves towards the direction close to the safety nut, and at the moment, the linkage rod and the working nut or the safety nut slide relatively, so that the normal function of the safety nut is ensured; before installing work nut and safety nut to the lead screw, install the linkage pole earlier, install back on work nut and safety nut with the gangbar, have the clearance between work nut and the safety nut, then twist the work nut on the lead screw, to work nut pivoted in-process, safety nut and work nut rotate in step under the effect of gangbar, thereby make safety nut also threaded connection on the lead screw, through setting up the gangbar, can realize the synchronous rotation of safety nut and work nut, when the lead screw rotates and drives work nut, need not to twist safety nut alone again and move, and then reach the effect that reduces staff's work load.

In order to alleviate the problem that the cost is higher when the lifting device to the car lifting jack maintains, the second purpose of this application is to provide a car lifting jack that uses above-mentioned lifting device.

The utility model provides an use above-mentioned elevating gear's car lifting jack, still includes organism and the bracket mechanism on the vertical sliding connection organism, the one end of lead screw passes bracket mechanism and rotates with the organism to be connected, connecting block and bracket mechanism fixed connection, driving motor and organism fixed connection.

Through adopting above-mentioned technical scheme, when using the car lifting jack to lift the vehicle, place four car lifting jacks respectively in the relative both sides of vehicle, then stretch into the bottom of vehicle with the one end of bracket mechanism, start driving motor, driving motor drives the lead screw, and relative rotation takes place for lead screw and working nut, and the lead screw drives the connecting block motion, and the connecting block drives the bracket mechanism motion, and bracket mechanism conflicts and carries out the lifting to the vehicle with the bottom of vehicle, realizes the lifting of vehicle promptly.

When the working nut on the lifting device is replaced, only one part of the working nut needs to be replaced, and finally the effect of reducing the cost when the lifting device of the car lifting jack is maintained is achieved.

Optionally, two telescopic pipes are sleeved outside the screw rod, one telescopic pipe is abutted to the bottom of the connecting block, the top of the telescopic pipe is detachably connected with the machine body, the other telescopic pipe is abutted to the machine body, and the top of the telescopic pipe is detachably connected with the safety nut.

By adopting the technical scheme, when the lifting device lifts the bracket mechanism, the telescopic pipe at the bottom of the working nut is lengthened, and the telescopic pipe at the top of the working nut is compressed, so that the telescopic pipe can protect the screw rod for all time, the damage of the screw rod from the outside is reduced, and the service life of the car lifting jack is prolonged; when the bracket mechanism lifts the vehicle, the gravity borne by the bracket mechanism is large, the friction force between the screw rod and the safety nut is large, lubricating oil needs to be smeared on the screw rod, the telescopic pipe protects the screw rod all the time, and the situation that dust is adhered to the screw rod is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the screw rod, the working nut, the connecting block and the driving motor, the working nut is detachably connected with the connecting block, the connecting block is fixedly connected with the lifted piece, and when the working nut is replaced, only one part of the working nut needs to be replaced, so that the effect of reducing the cost is achieved;

the prepressing piece is inserted in the clamping groove by arranging the prepressing piece and the clamping groove, when the working nut and the screw rod rotate relatively, the connecting block moves synchronously with the working nut under the action of the prepressing piece and the clamping groove, when the working nut is replaced, the prepressing piece is separated from the clamping groove and then screwed off the screw rod, and therefore the effect of facilitating replacement of the working nut is achieved;

through setting up synchronizing bar and synchronizing structure, synchronizing structure and the mutually supporting of synchronizing bar make work nut and connecting rod simultaneous movement, when changing work nut, separate synchronizing bar and synchronizing structure earlier, then unscrew work nut from the lead screw, install new work nut to the lead screw on again, and synchronizing bar and synchronizing structure mutually support simultaneously, and then have reached the effect that the staff of being convenient for changed work nut.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment 1 of a lifting device of the present application;

fig. 2 is a partial structural schematic view of an embodiment 1 of the lifting device of the present application, mainly showing a clamping groove;

fig. 3 is a partial structural sectional view of the lifting device of the embodiment 1 of the present application, mainly showing the connection relationship among the linkage rod, the working nut and the safety nut;

fig. 4 is a partial structural sectional view of the lifting device of embodiment 1 of the present application, mainly illustrating another connection relationship among the linkage rod, the working nut and the safety nut;

fig. 5 is a partial structural sectional view of the lifting device of embodiment 1 of the present application, mainly illustrating another connection relationship among the linkage rod, the working nut and the safety nut;

fig. 6 is a partial structural schematic view of an embodiment 2 of the lifting device of the present application, mainly illustrating a synchronous structure;

fig. 7 is a partial structural schematic view of an example 2 of the lifting device of the present application, mainly illustrating another embodiment of the synchronous structure;

FIG. 8 is a schematic view of a part of the structure of an embodiment 2 of the lifting device of the present application, which mainly shows another embodiment of the synchronous structure;

fig. 9 is a schematic view of a part of the structure of the lifting device in embodiment 3 of the present application, which mainly shows the connection relationship among the inserted link, the connecting block and the working nut;

fig. 10 is a partial structural schematic view of a lifting device in accordance with embodiment 3 of the present application, which mainly shows another connection relationship among the inserted link, the connecting block and the working nut;

fig. 11 is a schematic view of a part of the structure of the lifting device in embodiment 3 of the present application, which mainly shows another connection relationship among the inserted link, the connecting block and the working nut;

fig. 12 is a schematic structural diagram of an embodiment of the car lifting jack of the present application.

Description of reference numerals: 100. a lead screw; 110. a telescopic pipe; 200. a working nut; 210. pre-tabletting; 220. a synchronization lever; 230. a placement chamber; 300. connecting blocks; 310. a clamping groove; 400. a drive motor; 500. a safety nut; 510. a linkage rod; 520. an accommodating chamber; 600. a synchronization structure; 610. accommodating grooves; 620. a synchronization slot; 630. a clamping block; 640. hiding the groove; 650. a communicating hole; 700. inserting a rod; 800. a body; 900. a carriage mechanism.

Detailed Description

The present application is described in further detail below with reference to figures 1-12.

The embodiment of the application discloses a lifting device.

Example 1:

referring to fig. 1, an elevating apparatus includes a lead screw 100, a work nut 200, a connection block 300, and a driving motor 400, wherein the work nut 200 is threadedly connected to the lead screw 100, the connection block 300 is sleeved outside the lead screw 100, and the connection block 300 can slide along a length direction of the lead screw 100. The working nut 200 is detachably connected with the connecting block 300, and the driving motor 400 is in transmission connection with the lead screw 100. After the connecting block 300 is connected to the working nut 200, the working nut 200 supports the connecting block 300, and the working nut 200 drives the connecting block 300 to move along the axial direction of the lead screw 100. When the lifting device is used, the connecting block 300 is fixedly connected with the lifted piece. Then, the driving motor 400 is started, and the driving motor 400 drives the lead screw 100. Because the limited part limiting the rotation of the lifted part is arranged on the lifted part, and the connecting block 300 is fixedly connected with the lifted part, the working nut 200 cannot rotate along with the lead screw 100, the working nut 200 moves along the length direction of the lead screw 100, the connecting block 300 and the working nut 200 synchronously move, and the connecting block 300 drives the lifted part to move, namely, the lifted part is lifted.

When the gravity of the object lifted by the lifting member is large, the pressure applied to the working nut 200 is large, which in turn causes the wear between the working nut 200 and the lead screw 100 to be increased, and the working nut 200 needs to be replaced. When the working nut 200 is replaced, the working nut 200 is separated from the connection block 300, the working nut 200 is unscrewed from the lead screw 100, and a new working nut 200 is screwed onto the lead screw 100, while the new working nut 200 is connected to the connection block 300. When the working nut 200 is replaced, other parts do not need to be replaced, and the effect of saving the cost when the working nut 200 is replaced is further achieved.

Referring to fig. 1 and 2, in order to realize the detachable connection and the synchronous motion of the connection block 300 and the working nut 200, one end of the working nut 200 close to the connection block 300 is fixedly connected with a pre-pressing piece 210, a clamping groove 310 is formed in the end surface of the connection block 300 facing the working nut 200, and the clamping groove 310 is matched with the pre-pressing piece 210. After the pre-pressing piece 210 is inserted into the clamping groove 310, the connecting block 300 moves synchronously with the working nut 200 under the mutual cooperation of the pre-pressing piece 210 and the clamping groove 310. The radial cross section of the pre-pressing piece 210 is a polygon, which may be any polygon, and in order to facilitate the bottom of the connecting block 300 to be provided with the clamping groove 310, the radial cross section of the pre-pressing piece 210 is a regular hexagon in this embodiment.

If the working nut 200 which is seriously worn is not replaced, the threaded connection between the working nut 200 and the lead screw 100 is possibly failed, so that the lifted piece falls from a high place, and a huge potential safety hazard exists.

In order to reduce the potential safety hazard of the lifted piece as much as possible, a safety nut 500 is connected to the screw rod 100 in a threaded manner, and the safety nut 500 is located at one end of the working nut 200, which is far away from the connecting block 300. After the working nut 200 and the safety nut 500 are both connected to the lead screw 100, a gap is formed between the working nut 200 and the safety nut 500, so that when the threaded connection between the working nut 200 and the lead screw 100 is in effect (the threaded connection between the working nut 200 and the lead screw 100 can bear the gravity of a lifted piece), the safety nut 500 is free from external pressure. After work nut 200 became invalid with lead screw 100's threaded connection, work nut 200 moved towards safety nut 500, made work nut 200 to contradict on safety nut 500 then, safety nut 500 supported work nut 200, and safety nut 500 and carried on spacingly to work nut 200's motion, and the reduction is descended suddenly by the lifting piece and probably is led to the fact the condition of injury to the staff and takes place, and then reduces elevating gear's potential safety hazard.

After the screw 100 drives the working nut 200 to a predetermined position, the safety nut 500 needs to be screwed, so that the gap between the safety nut 500 and the working nut 200 is kept small. The smaller the gap between the safety nut 500 and the working nut 200 is, the smaller the impact of the falling of the lifted piece on the safety nut 500 is after the threaded connection between the working nut 200 and the lead screw 100 fails, and the safer the lifting device is.

Referring to fig. 3, in order to realize the synchronous movement of the safety nut 500 and the working nut 200 and reduce the occurrence of the situation that a worker needs to manually screw the safety nut 500, a plurality of linkage rods 510 are arranged between the working nut 200 and the safety nut 500, the central axis of each linkage rod 510 is parallel to the central axis of the screw 100, and the linkage rods 510 are uniformly arranged along the circumferential direction of the screw 100 at intervals. One end of each linkage rod 510 is connected with one end of the working nut 200 close to the safety nut 500, and the other end of each linkage rod 510 is connected with one end of the safety nut 500 close to the working nut 200, so that the synchronous movement of the safety nut 500 and the working nut 200 is realized, and the situation that workers need to manually screw the safety nut 500 is reduced.

A plurality of accommodating cavities 520 are formed in the opposite end faces of the working nut 200 and the safety nut 500. After the linkage rod 510, the working nut 200 and the safety nut 500 are all mounted on the screw rod 100, one end of the linkage rod 510 is inserted into the accommodating cavity 520 of the working nut 200, and the other end of the linkage rod 510 is inserted into the accommodating cavity 520 of the safety nut 500; the distance between the bottoms of the two opposite accommodating cavities 520 of the working nut 200 and the safety nut 500 is greater than the length of the linkage rod 510. When the lead screw 100 drives the working nut 200, the working nut 200 drives the safety nut 500 to rotate under the action of the linkage rod 510, so that the safety nut 500 and the working nut 200 can rotate synchronously, and the situation that workers need to rotate the safety nut 500 manually is reduced.

Before the working nut 200 and the safety nut 500 are connected to the screw 100, one ends of the linkage rods 510 are inserted into the corresponding accommodating cavities 520 in the safety nut 500, and then the working nut 200 is installed, so that the other ends of the linkage rods 510 are inserted into the corresponding accommodating cavities 520 in the working nut 200, and a gap is formed between the working nut 200 and the safety nut 500. Then, the working nut 200 is screwed on the screw 100, and when the working nut 200 is screwed on the screw 100, the clearance between the safety nut 500 and the working nut 200 is kept unchanged, and as the working nut 200 moves towards the middle section of the screw 100, the safety nut 500 is also screwed on the screw 100, that is, the installation of the working nut 200 and the safety nut 500 is completed.

After the threaded connection between the working nut 200 and the lead screw 100 fails, the working nut 200 moves towards the direction of the safety nut 500, so that the depth of the linkage rod 510 inserted into the accommodating cavity 520 in the working nut 200 is continuously increased, finally, the linkage rod 510 is located at one section outside the safety nut 500 and is completely inserted into the accommodating cavity 520 in the working nut 200, at the moment, the working nut 200 is abutted against the safety nut 500, and the mounting nut 500 supports the working nut 200.

Referring to fig. 4, in this embodiment, the relationship among the linkage rod 510, the safety nut 500 and the working nut 200 may also be that the linkage rod 510 is fixedly connected to the end surface of the safety nut 500 facing the working nut 200, at this time, a plurality of accommodating cavities 520 are formed on the end surface of the working nut 200 facing the safety nut 500 corresponding to the plurality of linkage rods 510, and the depth of the accommodating cavities 520 is greater than the length of the linkage rods 510. The end of the linkage rod 510 remote from the safety nut 500 is inserted into the corresponding receiving cavity 520. When the working nut 200 and the safety nut 500 move relatively, one end of the linkage rod 510 far away from the safety nut 500 slides relatively to the accommodating cavity 520 on the working nut 200.

Referring to fig. 5, in this embodiment, the relationship among the linkage rod 510, the safety nut 500 and the working nut 200 may also be that the linkage rod 510 is fixedly connected to the end surface of the working nut 200 facing the safety nut 500, at this time, a plurality of accommodating cavities 520 are formed on the end surface of the safety nut 500 facing the working nut 200 corresponding to the plurality of linkage rods 510, and the depth of the accommodating cavities 520 is greater than the length of the linkage rods 510. The end of the linkage bar 510 remote from the work nut 200 is inserted into the corresponding receiving cavity 520. When the working nut 200 and the safety nut 500 move relatively, one end of the linkage rod 510 far away from the working nut 200 slides relatively to the accommodating cavity 520 on the safety nut 500.

The implementation principle of the lifting device in the embodiment of the application is as follows: when the lifting device is used, the connecting block 300 and the lifted piece are fixedly connected together, then the driving motor 400 is started, and the driving motor 400 drives the lead screw 100. The working nut 200 rotates relative to the lead screw 100 under the action of the limiting member on the lifted member, and then the working nut 200 moves along the length direction of the lead screw 100, that is, the lifted member is lifted.

When the working nut 200 is replaced, the connecting block 300 is separated from the working nut 200, then the prepressing piece 210 is separated from the clamping groove 310, then the working nut 200 is unscrewed from the lead screw 100, then a new working nut 200 is screwed onto the lead screw 100, and meanwhile the prepressing piece 210 is inserted into the clamping groove 310, namely the replacement of the working nut 200 is completed.

Example 2:

referring to fig. 6 to 8, the present embodiment is different from embodiment 1 in that a synchronizing rod 220 is provided on a circumferential side surface of one end of the working nut 200 near the connection block 300, and a central axis of the synchronizing rod 220 is disposed perpendicular to a central axis of the lead screw 100. The bottom of the connecting block 300 is provided with a synchronizing structure 600, the synchronizing structure 600 is matched with the synchronizing rod 220, and the synchronizing rod 220 and the synchronizing structure 600 are matched with each other to enable the connecting block 300 and the working nut 200 to move synchronously.

Referring to fig. 6, in order to achieve the synchronous movement and the detachable connection of the working nut 200 and the connection block 300 through the mutual cooperation of the synchronization rod 220 and the synchronization structure 600, the synchronization rod 220 is provided with a plurality of synchronization rods 220, the plurality of synchronization rods 220 are uniformly arranged along the circumferential direction of the working nut 200 at intervals, and each synchronization rod 220 is fixedly connected with the working nut 200. The synchronizing structure 600 includes an accommodating groove 610 and a plurality of synchronizing grooves 620, the accommodating groove 610 and the plurality of synchronizing grooves 620 are communicated with each other, and the accommodating groove 610 and the synchronizing grooves 620 are all provided on the end surface of the connecting block 300 facing the working nut 200. The receiving groove 610 is adapted to an end of the working nut 200 adjacent to the connecting block 300, and the synchronizing groove 620 is adapted to the corresponding synchronizing bar 220. After the working nut 200 and the connection block 300 are connected, one end of the working nut 200 close to the connection block 300 is inserted into the receiving groove 610, and one of the synchronization rods 220 is inserted into one of the synchronization grooves 620. When the working nut 200 moves in the length direction of the screw 100, the connecting block 300 follows the working nut 200 under the mutual cooperation of the synchronizing rod 220 and the synchronizing groove 620, i.e., the synchronous movement of the connecting block 300 and the working nut 200 is realized.

When the working nut 200 is replaced, the connecting block 300 is separated from the working nut 200, then the synchronizing rod 220 is separated from the synchronizing groove 620, then the working nut 200 is unscrewed from the lead screw 100, then a new working nut 200 is connected to the lead screw 100 in a threaded manner, and meanwhile, one synchronizing rod 220 is inserted into one synchronizing groove 620, so that the replacement of the working nut 200 is completed.

Referring to fig. 7, in this embodiment, the synchronizing structure 600 may further be configured such that the synchronizing structure 600 includes a plurality of clamping blocks 630, each of the clamping blocks 630 is fixedly connected to the end surface of the connecting block 300 facing the working nut 200, and a gap for accommodating the synchronizing rod 220 is formed between two adjacent clamping blocks 630. After the working nut 200 and the connecting block 300 are connected together, both sides of each synchronizing rod 220 are respectively abutted against two adjacent catching blocks 630. When the working nut 200 moves, the connecting block 300 moves synchronously with the working nut 200 under the mutual cooperation of the clamping block 630 and the synchronizing rod 220.

When the working nut 200 is replaced, the synchronizing rod 220 on the working nut 200 is separated from the clamping blocks 630 on the connecting block 300, then the working nut 200 is unscrewed from the lead screw 100, a new working nut 200 is screwed onto the lead screw 100, and meanwhile, the synchronizing rod 220 is inserted between two adjacent clamping blocks 630, namely, the replacement of the working nut 200 is completed.

Referring to fig. 8, the synchronizing structure 600 and the synchronizing bar 220 of the present embodiment may be further configured such that the synchronizing structure 600 includes a hidden groove 640 and a communication hole 650, the hidden groove 640 is formed at the bottom of the connecting block 300, the hidden groove 640 allows one end of the working nut 200 to be inserted into the connecting block 300, and the communication hole 650 is formed at the connecting block 300 and the working nut 200. After the end of the working nut 200 close to the connection block 300 is inserted into the hidden groove 640, the communication hole 650 of the working nut 200 corresponds to the communication hole 650 of the connection block 300, and at this time, the end of the synchronization rod 220 is inserted into the two communication holes 650, so that the connection between the connection block 300 and the working nut 200 is realized.

When the working nut 200 moves, the connection block 300 moves in synchronization with the working nut 200 by the mutual engagement of the synchronization rod 220 and the communication hole 650. When the work nut 200 is replaced, the synchronization rod 220 is pulled out from the communication hole 650, the work nut 200 is unscrewed from the screw rod 100, a new work nut 200 is screwed onto the screw rod 100, and when the communication hole 650 of the work nut 200 and the communication hole 650 of the connection block 300 correspond to each other, the synchronization rod 220 is inserted into the two communication holes 650, thereby completing the replacement of the work nut 200.

The implementation principle of the lifting device in the embodiment of the application is as follows: when the working nut 200 is replaced, the connecting block 300 is separated from the working nut 200, the synchronizing rod 220 is moved out of the synchronizing groove 620, and then the working nut 200 is unscrewed from the screw 100. The new work nut 200 is screwed to the lead screw 100 while the synchronization rod 220 is inserted into the synchronization groove 620, thereby completing the replacement of the work nut 200.

Example 3:

referring to fig. 9, the present embodiment is different from embodiment 1 in that a plurality of insert rods 700 are disposed between the working nut 200 and the connecting block 300, the plurality of insert rods 700 are sequentially disposed at intervals along the circumferential direction of the lead screw 100, and each insert rod 700 is disposed parallel to the lead screw 100. The opposite end surfaces of the working nut 200 and the connecting block 300 are provided with placing cavities 230 corresponding to the inserting rods 700. After the working nut 200 is coupled to the connecting block 300, one end of an insertion rod 700 is inserted into one of the placing cavities 230 of the working nut 200, and the other end of the insertion rod 700 is inserted into one of the placing cavities 230 of the connecting block 300. When the working nut 200 moves, the connection block 300 follows the movement of the working nut 200 by the interaction of the insertion rod 700 and the placing chamber 230.

When the working nut 200 is installed, the inserted link 700 is inserted into the placing cavity 230 on the working nut 200, then the working nut 200 is screwed on the lead screw 100, and when the inserted link 700 corresponds to the placing cavity 230 on the connecting block 300, the connecting block 300 is slid, so that a section of the inserted link 700, which is located outside the working nut 200, is inserted into the placing cavity 230 of the connecting block 300, and the installation of the working nut 200 is completed.

When the working nut 200 is replaced, the connecting block 300 is slid first to separate the insertion rod 700 from the placing cavity 230 on the connecting block 300, then the working nut 200 is unscrewed from the lead screw 100, then the insertion rod 700 is pulled out of the working nut 200 and inserted into a new working nut 200, then the new working nut 200 is screwed onto the lead screw 100, and meanwhile, the insertion rod 700 is inserted into the placing cavity 230 on the connecting block 300, thus completing the replacement of the working nut 200.

Referring to fig. 10, the relationship among the insertion rod 700, the working nut 200 and the connecting block 300 in this embodiment may be that the insertion rod 700 is fixedly connected to the end surface of the connecting block 300 facing the working nut 200, and at this time, a plurality of placing cavities 230 are formed on the end surface of the working nut 200 facing the connecting block 300 corresponding to the plurality of insertion rods 700. When the connection block 300 is connected with the work nut 200, the insert rod 700 is inserted into the placing cavity 230 on the work nut 200. When the connection block 300 is separated from the work nut 200, the insert rod 700 slides relative to the placing chamber 230.

Referring to fig. 11, in the present embodiment, the relationship among the insertion rod 700, the working nut 200 and the connecting block 300 may be that the insertion rod 700 is fixedly connected to the end surface of the working nut 200 facing the connecting block 300, and at this time, a plurality of placing cavities 230 are formed on the end surface of the connecting block 300 facing the working nut 200 corresponding to the plurality of insertion rods 700. When the connecting block 300 is coupled with the working nut 200, the insert pin 700 is inserted into the placing cavity 230 on the connecting block 300. When the connection block 300 is separated from the work nut 200, the insert rod 700 slides relative to the placing chamber 230.

The implementation principle of the lifting device in the embodiment of the application is as follows: when the working nut 200 is replaced, the connecting block 300 is separated from the working nut 200, and then the insert rod 700 moves out of the placing cavity 230 on the connecting block 300. Then the working nut 200 is unscrewed from the screw 100, the inserted link 700 is removed from the working nut 200, the inserted link 700 is inserted into the placing cavity 230 on the new working nut 200, then the working nut 200 is screwed to the screw 100, and simultaneously, the section of the inserted link 700 which is positioned outside the working nut 200 is inserted into the placing cavity 230 on the connecting block 300, namely, the replacement of the working nut 200 is completed.

The embodiment of the application also discloses a car lifting jack using the lifting device.

Referring to fig. 12, a car lifting jack using a lifting device includes a detachable body 800, a bracket mechanism 900, and the lifting device of any of embodiments 1 to 3, wherein one end of the bracket mechanism 900 is disposed in the body 800, and the bracket mechanism 900 is slidably connected to the body 800 in a vertical direction. The lead screw 100 is vertically arranged in the machine body 800 and is rotatably connected with the machine body 800, one end of the lead screw 100 penetrates through the bracket mechanism 900, the connecting block 300 is fixedly connected with the bracket mechanism 900, and the driving motor 400 is fixedly connected with the bottom of the machine body 800.

When the car lifting jack is used for lifting a car, four car lifting jacks are needed to be used, the four car lifting jacks are respectively and uniformly placed on two opposite sides of the car, and then one end, far away from the machine body 800, of the bracket mechanism 900 is inserted into the bottom of the car. The driving motor 400 is started, the driving motor 400 drives the lead screw 100, the working nut 200 rotates with the lead screw 100, then the working nut 200 moves along the length direction of the lead screw 100, the working nut 200 drives the connecting block 300 to move, and the connecting block 300 drives the bracket mechanism 900 to move. With the continuous movement of the tray mechanism 900, the tray mechanism 900 interferes with the bottom of the vehicle, and the tray mechanism 900 lifts the vehicle.

When the car lifting jack lifts a car, the pressure born by the bracket mechanism 900 is large, so that the friction force between the working nut 200 and the lead screw 100 is large, and lubricating oil needs to be smeared on the lead screw 100 in the actual use process of the car lifting jack, so that the effect of reducing the friction force between the working nut 200 and the lead screw 100 is achieved. However, when the car lifting jack lifts the car, dust at the bottom of the car can adhere to the lead screw 100, so that lubricating oil on the lead screw 100 is polluted, and the lubricating effect of the lubricating oil on the lead screw 100 is reduced.

Referring to fig. 12, in order to reduce the contamination of the lubricant applied to the lead screw 100, two telescopic pipes 110 are sleeved outside the lead screw 100. One end of an extension tube 110 is detachably connected with the top of the machine body 800 by a clamp, and the other end of the extension tube 110 is abutted against the top of the connecting block 300. One end of the other telescopic tube 110 is detachably connected with the safety nut 500 through a clamp, and the other end of the telescopic tube 110 is abutted against the bottom of the machine body 800. When the connecting block 300 moves in the length direction of the lead screw 100, one telescopic tube 110 is compressed, and the other telescopic tube 110 is extended. The two extension tubes 110 isolate the lead screw 100 from the outside, thereby reducing the occurrence of dust adhering to the lead screw 100 and further reducing the occurrence of pollution of lubricating oil smeared on the lead screw 100.

It should be noted here that the telescopic tube 110 may also protect the lead screw 100, and the telescopic tube 110 may reduce direct contact between an external object and the lead screw 100, so as to reduce damage to the lead screw 100 caused by the external object, thereby achieving an effect of increasing the service life of the car lifting jack.

The implementation principle of the car lifting jack using the lifting device in the embodiment of the application is as follows: when the working nut 200 installed on the car lifting jack is replaced, the machine body 800 is firstly disassembled, then the lead screw 100 is taken down from the machine body 800, then the working nut 200 is separated from the connecting block 300, the working nut 200 is unscrewed from the lead screw 100, then a new working nut 200 is screwed on the lead screw 100, meanwhile, the working nut 200 is connected with the connecting block 300, then the lead screw 100 is reinstalled in the machine body 800, and finally the machine body 800 is assembled, namely, the replacement of the working nut 200 is completed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A lifting device is characterized in that: including work nut (200), the connection of screw thread on lead screw (100), connecting block (300) and the drive lead screw (100) of dismantling on work nut (200) rotate driving motor (400), work nut (200) drive connecting block (300) along the axial synchronous motion of lead screw (100), connecting block (300) be used for with by lifting piece fixed connection.

2. A lifting device as claimed in claim 1, characterized in that: the top fixedly connected with of work nut (200) cup joints at the outside pre-compaction piece (210) of lead screw (100), the radial cross-section of pre-compaction piece (210) is the polygon, joint groove (310) with pre-compaction piece (210) looks adaptation is seted up to the bottom of connecting block (300), pre-compaction piece (210) are pegged graft with joint groove (310).

3. A lifting device as claimed in claim 1, characterized in that: the side of week that work nut (200) are close to self top one end is provided with synchronizing bar (220), the bottom of connecting block (300) is provided with the synchronizing structure (600) with synchronizing bar (220) adaptation, synchronizing bar (220) and synchronizing structure (600) cooperation make connecting block (300) and work nut (200) simultaneous movement.

4. A lifting device as claimed in claim 3, characterized in that: the synchronous structure (600) comprises an accommodating groove (610) and a synchronous groove (620) which are all formed in the bottom of the connecting block (300), the synchronous groove (620) is communicated with the accommodating groove (610), one end of the top of the working nut (200) is inserted into the accommodating groove (610), and the synchronous rod (220) is inserted into the synchronous groove (620).

5. A lifting device as claimed in claim 3, characterized in that: the synchronizing structure (600) includes polylith joint piece (630), polylith the equal fixed connection in the bottom of connecting block (300) of joint piece (630), adjacent two have the clearance that holds synchronizing bar (220) between joint piece (630), synchronizing bar (220) insert in the clearance between two adjacent joint pieces (630).

6. A lifting device as claimed in claim 1, characterized in that: an inserting rod (700) is arranged between the working nut (200) and the connecting block (300), and the inserting rod (700) is used for enabling the working nut (200) and the connecting block (300) to move synchronously.

7. A lifting device as claimed in claim 1, characterized in that: threaded connection has safety nut (500) on lead screw (100), safety nut (500) are located work nut (200) and deviate from the one end of connecting block (300), safety nut and work nut interval set up.

8. A lifting device as claimed in claim 7, characterized in that: a linkage rod (510) is connected between the working nut (200) and the safety nut (500) in a sliding mode, and the linkage rod (510) is used for enabling the working nut (200) and the safety nut (500) to move synchronously.

9. A car lifting jack using the lifting device of any one of claims 1 to 8, characterized in that: still include organism (800) and vertical sliding connection bracket mechanism (900) on organism (800), the one end of lead screw (100) is passed bracket mechanism (900) and is rotated with organism (800) and be connected, connecting block (300) and bracket mechanism (900) fixed connection, driving motor (400) and organism (800) fixed connection.

10. The car lifting jack using the lifting device according to claim 9, wherein: the outer portion of the screw rod (100) is sleeved with two telescopic pipes (110), the bottom of one telescopic pipe (110) is abutted to the top of the connecting block (300), the top of the telescopic pipe (110) is detachably connected with the machine body (800), the bottom of the other telescopic pipe (110) is abutted to the machine body (800), and the top of the telescopic pipe (110) is detachably connected with the safety nut (500).

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