CN111265055A

CN111265055A - Lifting control device and lifting bed

Info

Publication number: CN111265055A
Application number: CN202010119072.3A
Authority: CN
Inventors: 王小兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-06-12

Abstract

The invention discloses a lifting control device and a lifting bed, wherein the device comprises: driving source, rope winding shaft, lifting unit, diversion pulley and lifting rope, lifting unit includes: the lifting member is sleeved on the outer edge of the lifting threaded rod and is fixedly connected with the lifting threaded rod; the direction-changing pulley is fixed relative to the lifting threaded rod, the first end of the lifting rope is wound on the rope winding shaft, the middle part of the lifting rope winds around the direction-changing pulley, and the second end of the lifting rope is used for being connected with a controlled object. Therefore, the rope winding shaft is driven to rotate by the driving source, the lifting threaded rod can be driven to lift and descend at the same time by matching the thread matching relationship between the rope winding shaft and the lifting threaded rod, so that the lifting rope is wound on the rope winding shaft or released from the rope winding shaft, the controlled object is gradually lifted along with the gradual increase of the length of the lifting rope wound on the rope winding shaft, and conversely, the controlled object is gradually lowered along with the gradual decrease of the length of the lifting rope wound on the rope winding shaft; so that the long stroke control of the controlled object can be realized by winding the lifting rope.

Description

Lifting control device and lifting bed

Technical Field

The invention relates to the technical field of mechanical structures, in particular to a lifting control device and a lifting bed.

Background

Lifting control device uses very generally, and applicable structure is various, for example the utility model patent of grant bulletin number CN206735703U discloses a four-wheel elevating gear, as shown in fig. 1, it includes bottom plate support body 16, locate four group's truckles 1 of bottom plate support body 16 bottom and locate guiding mechanism and drive mechanism between bottom plate support body 16 and truckle 1, above-mentioned guiding mechanism is including locating the guide post of every group's truckle 1 mount pad top and locating the direction support 17 on bottom plate support body 16, this guide post pass bottom plate support body 16 and with the cooperation of leading about direction support 17. The transmission mechanism comprises a transverse gear transmission shaft 6, a longitudinal gear transmission shaft 13, gears and worm gear transmission mechanisms, wherein the gears and the worm gear transmission mechanisms are arranged at two ends of the transverse gear transmission shaft 6 and the longitudinal gear transmission shaft 13, the transverse gear transmission shaft 6 and the longitudinal gear transmission shaft 13 are both arranged on the bottom plate frame body 16, lifting racks meshed with the gears at two ends of the transverse gear transmission shaft 6 and the longitudinal gear transmission shaft 13 are arranged on four groups of guide posts, the four groups of guide posts are in synchronous transmission connection with the longitudinal gear transmission shaft 13 through the transverse gear transmission shaft 6, and the worm gear transmission mechanisms are arranged on the transverse gear transmission shaft 6 or the longitudinal gear transmission shaft 13 and are used for driving the bottom plate frame body 16 to move up and down on four groups of trundles 1.

For another example, the utility model with the publication number of CN201952162U discloses a lifting device and a packing box with the same, as shown in fig. 2, wherein the lifting device comprises: comprises the following steps: the bottom frame 10, the top frame 50, and the scissors-shaped mechanism 30 arranged between the bottom frame 10 and the top frame 50, a first bar-shaped groove 11 is arranged at one side end of the bottom frame 10, a second bar-shaped groove 51 is arranged at the same side end of the top frame 50, a first hinge hole 12 is arranged at the other side end of the bottom frame 10, a second hinge hole 52 is arranged at the same side end of the top frame 50, the scissors-shaped mechanism 30 is connected to the bottom frame 10 through the first bar-shaped groove 11 and the first hinge hole 12, and is connected to the top frame 50 through the second bar-shaped groove 51 and the second hinge hole 52.

The four-wheel lifting device directly utilizes the gear rack to realize lifting, and is usually used for realizing lifting control of short stroke, and the lifting control of long stroke needs to double the size of the gear rack to ensure the structural strength, so that the occupied space is large; the lifting device realizes lifting control through the scissors-shaped mechanism, and the scissors-shaped mechanism has the problem of large occupied space; it can be said that most of the lifting control devices in the prior art have the problem of large occupied space when realizing long-stroke lifting control.

It can be seen that the prior art is still in need of improvement and development.

Disclosure of Invention

In view of the above-mentioned disadvantages of the prior art, an object of the present invention is to provide a lift control device and a lift bed, which are capable of solving the problem of the prior art that the lift control device occupies a large space when realizing long-stroke lift control.

The technical scheme of the invention is as follows:

a lift control device, comprising: driving source, rope winding shaft, lifting unit, diversion pulley and lifting rope, the driving source is used for the drive to rotate around the rope winding shaft, lifting unit includes: the rope winding shaft is provided with a thread matched with the lifting threaded rod, or the rope winding shaft is fixedly connected with a thread piece matched with the lifting threaded rod, and the rope winding shaft is used for driving the lifting threaded rod to lift while rotating; the lifting piece is sleeved on the outer edge of the lifting threaded rod and is fixedly connected with the lifting threaded rod; the direction-changing pulley is fixed relative to the lifting threaded rod, the first end of the lifting rope is wound on the rope winding shaft, the middle part of the lifting rope winds around the direction-changing pulley, and the second end of the lifting rope is used for being connected with a controlled object.

The invention also provides a lifting bed, which comprises the lifting control device, so that the lifting bed can have all the characteristics and effects of the lifting control device, and the description is omitted.

Compared with the prior art, the lifting control device provided by the invention comprises a driving source, a rope winding shaft, a lifting assembly, a direction-changing pulley and a lifting rope, wherein the driving source is used for driving the rope winding shaft to rotate, and the lifting assembly comprises: the rope winding shaft is provided with a thread matched with the lifting threaded rod, or the rope winding shaft is fixedly connected with a thread piece matched with the lifting threaded rod, and the rope winding shaft is used for driving the lifting threaded rod to lift while rotating; the lifting piece is sleeved on the outer edge of the lifting threaded rod and is fixedly connected with the lifting threaded rod; become to pulley relative lifting threaded rod immovable, the first end of lifting rope twines in around the rope shaft, and diversion pulley is walked around at the middle part, and the second end is used for connecting by the controlled object. The lifting control device provided by the invention drives the rope winding shaft to rotate through the driving source, and can drive the lifting threaded rod to lift and lower simultaneously by matching with the thread matching relationship between the rope winding shaft and the lifting threaded rod, and the lifting rope can be wound on the rope winding shaft or released from the rope winding shaft by matching with the direction-changing pulley; the long stroke control of the controlled object can be realized by winding the lifting rope, and the problem that the lifting control device in the prior art occupies a large space when realizing the long stroke lifting control is solved.

Drawings

Fig. 1 is a schematic structural view of a four-wheel lifting device in the prior art.

Fig. 2 is a schematic structural diagram of a lifting device in the prior art.

Fig. 3 is a schematic structural diagram of a lift control device according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of an elevation control apparatus according to an embodiment of the present invention.

Fig. 5 is a schematic view of an assembly structure of the rope winding shaft, the nut, the rope winding shaft and the rotary support seat according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of a cord reel for use in an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a nut used in the embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a lead screw used in the embodiment of the present invention.

Fig. 9 is a schematic structural view of a lifting member used in the embodiment of the present invention.

Fig. 10 is a schematic structural view of a guiding fixture used in an embodiment of the invention.

Fig. 11 is a top view of an elevator control apparatus according to an embodiment of the present invention.

Fig. 12 is a schematic view of a direction-changing pulley used in an embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a second lift control device according to an embodiment of the present invention.

Fig. 14 is a cross-sectional view of the lift control device with the drive source hidden according to the third embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a fourth lifting control device according to an embodiment of the present invention.

Fig. 16 is a schematic view of an assembly structure of the lifting member and the guide fixing member according to the fourth embodiment of the present invention.

Fig. 17 is a cross-sectional view of the elevation control apparatus with the drive source hidden according to the fifth embodiment of the present invention.

Fig. 18a is a schematic structural view of a ball pivot assembly for use in the lift control apparatus of the present invention.

Fig. 18b is a schematic view of a configuration of a draft elbow used in the present invention.

Figure 19 is a schematic view of a first perspective of a slotted rotational axis of the ball pivot assembly of the present invention.

Fig. 20 is a structural view of a slotted rotational shaft in the ball pivot assembly of the present invention from a second perspective.

Figure 21 is a cross-sectional view of a slotted rotary shaft in the ball turn assembly of the present invention.

Fig. 22 is a schematic structural view of the lifting bed in the preferred embodiment of the present invention.

Fig. 23 is an enlarged view of a portion a in fig. 22.

Fig. 24 is an enlarged view of a portion B in fig. 22.

Fig. 25 is an enlarged view of a portion C in fig. 22.

Fig. 26 is an enlarged view of a portion D in fig. 22.

FIG. 27 is a schematic illustration of an alternate preferred embodiment of the present invention showing the structure of the lift bed with hidden hollow support tubes.

Fig. 28 is an enlarged view of a portion E in fig. 27.

Fig. 29 is an enlarged view of a portion F in fig. 27.

Fig. 30 is an enlarged view of a portion G in fig. 27.

Fig. 31 is an enlarged view of a portion H in fig. 27.

FIG. 32 is a schematic diagram of an elevated bed with hollow support tubes concealed in accordance with a further preferred embodiment of the invention.

Detailed Description

The present invention provides a lifting control device and a lifting bed, and the purpose, technical scheme and effect of the present invention are more clear and clear, and the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments are merely illustrative of the invention and are not intended to limit the invention.

The lifting control device provided by the invention is used for controlling the lifting of an object, and comprises: a driving source (which can be a manual driving source or an automatic driving source), a rope winding shaft, a lifting component, a direction-changing pulley and a lifting rope. The lifting assembly comprises: the lifting threaded rod is in threaded fit with the rope winding shaft, or the rope winding shaft is fixedly connected with a threaded piece matched with the lifting threaded rod. The direction-changing pulley is fixed relative to the lifting threaded rod or the lifting assembly, the first end of the lifting rope is wound on the rope winding shaft, the middle part of the lifting rope winds around the direction-changing pulley, and the second end of the lifting rope is used for being connected with a controlled object.

The basic operation principle of the lifting control device is as follows: the rope winding shaft is driven by the driving source to rotate, because the rope winding shaft is in threaded fit with the lifting threaded rod (or because the threaded piece is in threaded fit with the lifting threaded rod), and the lifting threaded rod is fixedly connected with the lifting piece, therefore, the lifting threaded rod and the lifting piece as well as the direction-changing pulley fixed on the lifting piece will perform lifting movement while the rope winding shaft rotates (whether the lifting threaded rod is lifted or lowered can be controlled by controlling the rotation direction of the rope winding shaft, and the lifting of the lifting threaded rod is limited by the stroke, which is well known by those skilled in the art and will not be described in detail), because the direction-changing pulley is fixed relative to the lifting threaded rod (namely, the direction-changing pulley can synchronously lift along with the lifting threaded rod), the lifting rope which bypasses the direction-changing pulley and has one end wound on the rope winding shaft can have a longer lifting rope wound on the rope winding shaft or part of the lifting rope can be released from the rope winding shaft.

Example one

As shown in fig. 3 to 10, in the present embodiment, the driving source is preferably a rotating motor 111, the rotating motor 111 is connected to the rope winding shaft 112, the rope winding shaft 112 is fixedly connected with a screw member, preferably a nut 120 (as shown in fig. 4 and 7), and adapted thereto, the lifting screw rod is a lead screw 113 (as shown in fig. 4 and 8), the lead screw 113 is disposed through the lifting member 114 (as shown in fig. 4 and 9), and two first locking nuts 121 are detachably connected to an outer edge of an upper end of the lead screw 113, as shown in fig. 4, (one or more) may also be seen, and the first locking nut 121 is tightly pressed against an upper end surface of the upper end housing of the lifting member 114, so as to fixedly connect the lead screw 113 and the lifting member 114 together.

The lifting piece is sleeved on the outer edge of the rope winding shaft, and a raised ring 135 (shown in figure 5) is arranged on the outer edge of the upper end of the rope winding shaft. The function of the raised ring 135 includes the following two aspects: 1. the contact area between the rope winding shaft and the lifting piece is reduced, and the friction is reduced; the lifting piece is prevented from contacting with the part of the lifting rope wound by the rope winding shaft, and the surface of the lifting piece is abraded due to the repeated winding of the lifting rope by the rope winding shaft; 2. the rope winding shaft and the lifting component are kept in central axial rotation and lifting of the hollow support pipe through the tight contact of the raised ring 135, the lifting piece and the guide limiting strip, and the system is more stable in operation.

Preferably, a rotary support 119 (shown in fig. 4 and 5) is sleeved on the outer edge of the lower end of the rope winding shaft 112, and a rotary bearing is disposed between the rotary support 119 and the rope winding shaft 112 (the rotary bearing structure is prior art and is not shown and illustrated separately); preferably, a stepped hole is formed in the middle of the rotary support 119, the rotary bearing is installed from an opening of the stepped hole and placed on the step, and then a gland 123 (shown in fig. 5) is connected to one end of the opening in a threaded manner, so that the outer ring of the bearing is locked in the support 119; after the lower end of the rope winding shaft 112 penetrates through the rotary support seat 119 to rotate the bearing, two second lock nuts 122 (one or more can also be used) are sleeved from the lower part (as shown in fig. 4), the lower end of the rope winding shaft is locked on the inner ring of the bearing, the rope winding shaft 112 is clamped by matching with the rotary support seat 119, the rope winding shaft 112 is prevented from being pulled out of the support seat 119 by external force, and then the lower end of the rope winding shaft 112 is connected with the rotary motor 111.

As shown in fig. 6, a spacer 118 is disposed on the outer edge of the middle portion of the rope winding shaft 112 (as shown in fig. 3 to 6), and the spacer 118 includes: a perforated disc and a partition sheet, wherein the perforated disc is provided with a rope threading hole 118a (shown in fig. 5), and the lifting rope 117 (shown in fig. 3 and 4) is wound on the rope winding shaft 112 after passing through the rope threading hole 118 a; the partition plate is disposed near one side of the driving source, and the partition plate may prevent the lifting rope 117 from being separated. It will be appreciated that the spacer 118 may be formed integrally with the cord reel 112 or may be fixedly attached to the cord reel 112. In addition, the spacer 118 may be replaced by a spacer, which is different in that the spacer includes only an open-hole circular sheet and does not have a partition sheet.

As shown in fig. 3, when the spacer or spacer 118 is opened at the lower end of the rope winding shaft 112, the diameter of the rope winding shaft 112 can be made larger; when the spacer or spacer 118 is disposed at the upper end of the rope winding shaft 112, that is, when the rope winding shaft 112 is sleeved at one end of the interior of the lifting sleeve, a space for winding the lifting rope 117 needs to be reserved between the rope winding shaft 112 and the lifting sleeve, so that the diameter of the rope winding shaft is relatively smaller in the same space, and the diameter of the rope winding shaft is larger, so that the lifting range is also larger.

The lower end of the rope winding shaft 112 is provided with a rotating groove 112a and is connected with an output shaft of the rotating motor 111 through the rotating groove 112 a; a first accommodating groove 112c is formed at the upper end of the rope winding shaft 112, and the lower end of the nut 120 is accommodated in the first accommodating groove 112 c; the first receiving groove 112c is communicated with the second receiving groove 112b, and the lower end of the screw 113 is received in the second receiving groove 112b and lifted up and down in the second receiving groove 112 b.

As shown in fig. 8, a positioning protrusion 113a is disposed at the upper end of the screw 113, and a positioning groove 114a adapted to the positioning protrusion 113a is disposed on the lifting member 114 (as shown in fig. 9); the outer edge of the lifting member 114 is provided with a guide protrusion 114b, the lifting member 114 is adapted with a guide fixing member 115 through the guide protrusion 114b (as shown in fig. 3, 4 and 10), and the guide fixing member 115 is provided with a guide groove 115a adapted to the guide protrusion 114 b. Further, the guiding fixture 115 has a triangular shape, and the first side and the second side respectively fit to two adjacent inner walls of the hollow support tube (i.e. the guiding fixture 115 is fixed at the corner of the hollow support tube 125, as shown in fig. 11). In addition, the guiding fixing piece can be arranged into other shapes as long as the guiding of the lifting piece and the stable arrangement of the lifting piece can be realized.

As shown in fig. 12, the direction-changing pulley 117 preferably includes a sliding base 117a and at least one sliding wheel 117b, and preferably, a plurality of sliding wheels 117b are provided, and the sliding base 117a has an 1/4 circular sector shape, and the sliding base is 1/4 circular sector shape in order to maximize the effective radius of the direction-changing pulley in a limited space. In the same space, the fan-shaped sliding base enables the effective radius of the direction-changing pulley to be large, and strain of the lifting rope can be reduced to the minimum. The number of the direction-changing pulleys 117 is fixed at the lower end of the lifting piece 114, the number of the direction-changing pulleys can be set to be 1, 2, 3, 4 or more, the number of the corresponding lifting ropes is the same as that of the openings on the partition pieces.

The lifting member has three functions: connect, guide and stabilize. One of the main purposes of the lifting piece is the connection function, the lifting threaded rod is arranged at the center of the rope winding shaft, the direction-changing pulley is required to be close to the outer edge of the rope winding shaft, and the lifting piece is used for connecting the lifting threaded rod and the rope winding shaft. The other two functions of the lifting piece are as follows: first, the lifting member is fixed with the lifting threaded rod to through the cooperation with the direction mounting, the guide threaded rod can only go up and down, drives the diversion pulley and goes up and down simultaneously, does not have its lift restriction function, and the rotary motion of winding rope shaft just can not be accurate turn into the linear lifting motion of threaded rod, and the winding rope shaft is rotatory just can not be accurate with the diversion pulley go up and down and realize the inseparable winding of lifting rope. And secondly, the lifting piece keeps the rope winding shaft and the lifting threaded rod always in the central axial position of the hollow supporting tube through close contact with the rope winding shaft and the guide fixing piece, so that the whole system can stably run. The form of the lifting member is not particularly limited, and the lifting member may be cylindrical or strip-shaped.

As shown in fig. 11, the driving source, the supporting base, the rope winding shaft, the lifting assembly and the direction-changing pulley are accommodated in the internal cavity of the hollow supporting tube. As can be seen from fig. 11, the guide holder 115 is screw-coupled to the hollow support tube 125, and the elevating member 114 is fitted to the guide holder 115 through the guide protrusion and the guide groove.

The operation principle of the lifting control device provided by the embodiment is as follows: the rotating motor 111 drives the rope winding shaft 112 to rotate, the nut 120 rotates synchronously with the rope winding shaft 112 due to the fixed connection between the rope winding shaft 112 and the nut 120, and simultaneously, the nut 120 is in threaded fit with the lead screw 113 (the lead screw 113 is limited by the guide fixing part 115 through the lifting part 114 and can only lift), so that the lifting component performs lifting motion while the rope winding shaft 112 rotates, the direction-changing pulley lifts along with the lifting component under the condition that the direction-changing pulley 116 is fixed on the lifting part 114, and the lifting rope 117 continuously winds around the rope winding shaft 112 or is released from the rope winding shaft 112 along with the rotation of the rope winding shaft 112 and the lifting of the direction-changing pulley.

Example two

As shown in fig. 13, the second embodiment is basically the same as the first embodiment in structure and principle, and the difference between the two embodiments is: in this embodiment, the rotating motor is eliminated, and a worm gear 127 is provided at the lower end of the rope winding shaft 112, and a handle 126 is connected to the worm gear 127, so that a user can manually control winding and releasing of the lifting rope 117 by the handle 126.

EXAMPLE III

As shown in fig. 14, the third embodiment is basically the same as the first embodiment in structure and principle, the same components are not shown or labeled again in this embodiment, and the difference between the two embodiments is that: the rope winding shaft 112 of the first embodiment is connected with the nut 120 and is matched with the screw 113 through the nut 120, so that the rope winding shaft 112 of the first embodiment does not need to be provided with threads on the inner wall; the inner wall of the rope winding shaft 128 (different in structure, and marked with different marks for distinguishing two rope winding shafts with different structures) in the embodiment is threaded and is directly in threaded fit with the lifting threaded rod, so that the arrangement of a nut is eliminated. In addition, the lifting threaded rod in this embodiment is a combination rod 129, the upper end of the combination rod 129 is a smooth round rod, and the lower end of the combination rod 129 is a worm. The principle of the lifting control device provided in this embodiment is substantially the same as that of the embodiment, and will not be described again.

Example four

As shown in fig. 15 and 16, the structure and principle of the fourth embodiment are basically the same as those of the first embodiment, and the same components are not repeated in this embodiment, but the two embodiments are different in that: the middle part of the lifting member 114 in the first embodiment is cylindrical, and two symmetrical guide grooves are formed in the middle part of the lifting member 131 (different structures, so different reference numerals are used, please refer to fig. 15 and 16) in the first embodiment on the basis of the cylindrical shape; in the first embodiment, the guiding fixing member 115 is a strip and has a guiding groove on the inner side, and the guiding fixing member 132 in the first embodiment is adapted to the guiding groove and is preferably fixed to the hollow supporting tube by a screw. In this embodiment, the inner arc surface of the guiding and fixing member 132 is attached to the protruding ring 135 on the outer edge of the upper end of the rope winding shaft, and also has the function of fixing the rope winding shaft, so that the rope winding shaft is kept in the central axial rotation of the hollow support tube. The restriction in this embodiment can be interchanged with other embodiments.

EXAMPLE five

As shown in fig. 17, the fifth embodiment is basically the same as the third embodiment in structure and principle, the same components are not shown or labeled again in this embodiment, and the difference between the two embodiments is that: the lifting threaded rod in the third embodiment is a combination rod 129, the upper end of the combination rod 129 is a smooth round rod, and the lower end of the combination rod 129 is a worm; the lifting threaded rod in the embodiment is a screw 134 (shown in fig. 17); in this embodiment, the inner wall of the rope winding shaft 133 (shown in fig. 17, the structure is slightly different, and therefore, the reference numerals are different from those in the other embodiments) is threaded to the screw 134.

As a modification of the above preferred embodiment, the lifting screw rod may be replaced with a turning assembly, such as a ball turning assembly 190 shown in fig. 18a, which includes: a slotted rotating shaft 191, a pressing cover 192, a diversion elbow 193, a connecting screw 194 and a plurality of balls 195, the slotted shaft 191 includes a shaft body 191a (as shown in fig. 19 to 21), and it is easily seen that the shaft body 191a is mainly composed of an inner cylinder and an outer cylinder (or a circular ring body is continuously extended from the middle outer edge of one cylinder), an inner ball circulation groove 191b is longitudinally formed in the outer cylinder, the two ends of the inner ball circulation groove 191b are respectively communicated with an insertion tube groove 191c (the diversion bend 193 is accommodated in the insertion tube groove 191c), the outer edge of the outer cylinder is provided with an outer ball circulation groove 191d (the outer ball circulation groove 191d is communicated between the two insertion tube grooves 191c), the ball circulation outer groove 191d is threaded, and the ball circulation inner groove 191b, the baffle bend 193, and the ball circulation outer groove 191d are filled with a plurality of balls 195. Further, the cannula groove 191c is communicated with a cover body receiving groove 191e, and the press cover 192 is received in the cover body receiving groove 191e and detachably connected to the slotted rotating shaft 191 through a connecting screw 194 to press and fix the diversion bend 193. It is understood that the attachment of the elbow may be by other means (e.g., adhesive, snap, etc.), and the cover receiving groove 191e need not be formed, nor does the present invention require the use of the gland 192.

When the grooved rotation shaft 191 rotates, the plurality of balls 195 continuously roll and circulate in the ball circulation inner groove 191b, the diversion bend 193 (as shown in fig. 18 b) and the ball circulation outer groove 191d, so that the screw sleeve (not shown) adapted to the ball rotation assembly 190 is driven by the ball rotation assembly 190 to move up and down, and the balls can reduce friction force, thereby the transmission efficiency of the ball rotation assembly 190 is higher than that of screw members such as worm and screw.

The lifting control device provided by the invention can utilize structural configurations such as the rope winding shaft, the lifting threaded rod and the like to enable the lifting rope to be wound on or released from the rope winding shaft (under the condition that the rotating speed of the rotating part is better matched with the lifting speed of the lifting part, the lifting rope is tightly and uniformly wound on or released from the rope winding shaft); so that the long stroke control of the controlled object can be realized by winding the lifting rope.

In the preferred embodiment of the present invention, the lifting bed is a two-legged lifting bed (i.e. a lifting bed with two strands of lifting ropes controlling the lifting of the bed from one side), and in fig. 22 (fig. 22 the invention hides the hollow support tube to clearly illustrate the winding structure of the lifting ropes), an open guide slot is provided at the middle part of the hollow support tube 127 adjacent to the bed surface, and the sliding components fixed at two corners of the side surface of the bed plate slide up and down along the hollow support tube 127 through the open guide slot. It will be appreciated that the other two support legs of the lifting bed, apart from the two hollow support tubes 127 which are hidden, are common bed feet.

In the lifting control structure of the two-legged lifting bed, the lifting rope wound around the rope shaft is preferably two strands, which are respectively denoted by 116a and 116b in fig. 23 to 26 (i.e., 116a and 116b represent the first lifting rope and the second lifting rope), and as can be seen from fig. 23 to 26, the two-legged lifting bed provided by the present invention further includes: a first sliding assembly 161 (shown in fig. 23, including four first sliding wheels, and a first connecting block for fixing the four first sliding wheels, wherein the first connecting block is fixedly connected to the first strand of lifting rope 116 a), a first fixed pulley 162 (shown in fig. 24), a second fixed pulley 163 (shown in fig. 24), a third fixed pulley 164 (shown in fig. 25), and a second sliding assembly 165 (shown in fig. 26, including four second sliding wheels, and a second connecting block for fixing the four second sliding wheels, wherein the second connecting block is fixedly connected to the second strand of lifting rope 116 b).

One end of the first lifting rope 116a wound out by the direction-changing pulley passes through the first fixed pulley 162 and then is connected to the first connecting block, and the first sliding assembly 161 is lifted along with the lifting of the first lifting rope 116 a; one end of the second lifting rope 116b wound out by the direction-changing pulley is connected to the second connecting block by the second fixed pulley 163 and the third fixed pulley 164 in sequence, and the second sliding assembly 162 is lifted along with the lifting of the second lifting rope 116 b; the two-leg lifting bed can be controlled to lift through the lifting control device.

It is easy to understand that the two-leg lifting bed can be respectively connected with one corner of the bed plate through two sets of independent lifting control devices to realize lifting; in addition, the connection between the lifting rope and the bed plate can be realized by other structures, the invention is not limited to this, and the above specific embodiment is only for explanation.

In another preferred embodiment of the present invention, the lifting bed is a four-legged lifting bed (four legs are hollow support tubes 127, and the lifting rope is pulled inside the four legs), an open slot is provided at the middle section of the hollow support tube 127 near the bed surface, and the sliding components fixed at two corners of the side surface of the bed plate slide up and down along the hollow support tube 127 through the open slot. Fig. 27 is a schematic structural view of the lifting bed with the hollow supporting tube 127 hidden in another preferred embodiment of the present invention, which can be seen from fig. 28 to 31, and the lifting bed in this embodiment further includes, in addition to the lifting control device: a third sliding assembly 171 (shown in fig. 28), a third fixed pulley 172 (shown in fig. 29), a fourth fixed pulley 173 (shown in fig. 28), a fifth fixed pulley 174 (shown in fig. 29), a sixth fixed pulley 186 (shown in fig. 27), a fourth sliding assembly (not shown, its structure please refer to other sliding assemblies), a seventh fixed pulley 175 (shown in fig. 29), an eighth fixed pulley 176 (shown in fig. 30), a ninth fixed pulley 177 (shown in fig. 31), a fifth sliding assembly 178 (shown in fig. 31), a tenth fixed pulley 179 (shown in fig. 30), a tenth fixed pulley 181 (not shown), and a sixth sliding assembly 180 (shown in fig. 29).

The first lifting rope 116a in this embodiment extends upward (as shown in fig. 30), then passes around the seventh fixed pulley 175, extends backward through the seventh fixed pulley 175 (the direction described with reference to fig. 27), then passes around the eighth fixed pulley 176, extends downward through the eighth fixed pulley 176, and then passes around the ninth fixed pulley 177 (the ninth fixed pulley 177 is connected to the fifth sliding assembly 178, so that a corner of the bed board fixedly connected to the fifth sliding assembly 178 is lifted along with the lifting of the first lifting rope 116 a); the first lifting rope 116a passes through the ninth fixed pulley 177 and then continues to extend upward, and then passes through the tenth fixed pulley 179 and then extends leftward (the direction based on fig. 27 is described), it is easy to see from fig. 30 that a fixed pulley is disposed on the left side of the enlarged view G, the fixed pulley is an eleventh fixed pulley 181 (as shown in fig. 27), and the first lifting rope 116a passing through the tenth fixed pulley 179 passes through the tenth fixed pulley 181 and then extends downward and is fixedly connected to the sixth sliding assembly 180, so that as the first lifting rope 116a goes up and down, a corner of the ceiling fixedly connected to the sixth sliding assembly 180 goes up and down.

The second lifting rope 116b in this embodiment extends upward first (as shown in fig. 27), then passes around the third fixed pulley 172, passes through the third fixed pulley 172, then extends downward, and then passes around the fourth fixed pulley 173 (the fourth fixed pulley 173 is connected to the third sliding component 171, so that a corner of the bed board fixedly connected with the third sliding component 171 is lifted along with the lifting of the second lifting rope 116 b); after passing through the fourth fixed pulley 173, the second fixed pulley extends upward again, then passes through the fifth fixed pulley 174, and extends to the left side after passing through the fifth fixed pulley 174 (the direction is described by taking fig. 27 as a reference), it is not difficult to see from fig. 27, a fixed pulley is arranged on the left side of the enlarged view F, the fixed pulley is the sixth fixed pulley 186, the second strand of lifting rope 116b passing through the fifth fixed pulley 174 passes through the sixth fixed pulley 186, and extends downward after passing through the sixth fixed pulley 186, and then is fixedly connected to the fourth sliding component, so that as the second strand of lifting rope 116b goes up and down, a corner of the bed board fixedly connected with the fourth sliding component goes up and down along with the lifting and down of the fourth strand of lifting rope 116 b.

The winding manner of the lifting rope described in this embodiment is only an example, and those skilled in the art can make adaptive adjustments to control the lifting of the lifting bed by using other structures, which are not specifically limited by the present invention.

In another preferred embodiment of the present invention, the lifting bed is a four-legged lifting bed, fig. 32 is a schematic structural view of the lifting bed with the hollow support tubes hidden in the other preferred embodiment of the present invention, two sets of lifting control devices are adopted, that is, the structures in the preferred embodiment of the lifting bed are respectively arranged on two sides of the bed plate, and the description of this embodiment is omitted.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims

1. A lifting control device is characterized by comprising: driving source, rope winding shaft, lifting unit, diversion pulley and lifting rope, the driving source is used for the drive to rotate around the rope winding shaft, lifting unit includes: the rope winding shaft is provided with a thread matched with the lifting threaded rod, or the rope winding shaft is fixedly connected with a thread piece matched with the lifting threaded rod, and the rope winding shaft is used for driving the lifting threaded rod to lift while rotating; the lifting piece is sleeved on the outer edge of the lifting threaded rod and is fixedly connected with the lifting threaded rod; the direction-changing pulley is fixed relative to the lifting threaded rod, the first end of the lifting rope is wound on the rope winding shaft, the middle part of the lifting rope winds around the direction-changing pulley, and the second end of the lifting rope is used for being connected with a controlled object.

2. The lift control device of claim 1, wherein the upper and/or lower ends of the rope spool are provided with spacer pads or spacers, the spacer pads comprising: the lifting rope is wound on the rope winding shaft after penetrating through the rope penetrating hole, and the partition piece is arranged on one side, away from the direction-changing pulley, of the perforated wafer; the spacer is provided with a rope threading hole, and the lifting rope penetrates through the rope threading hole and then is wound on the rope winding shaft.

3. The lifting control device as claimed in claim 1, wherein the direction-changing pulley comprises a sliding base and at least one sliding wheel, the sliding wheel is rotatably connected to the sliding base, and the sliding base is in a shape of 1/4 circular sectors.

4. The lifting control device as claimed in claim 1, wherein the lifting member is fitted around or wound around an outer edge of the rope winding shaft, and the direction-changing pulley is fixed to an end of the lifting member facing away from the end fitted with the lifting threaded rod.

5. The lift control device of claim 1, further comprising: the lifting piece comprises a hollow supporting tube and a guiding fixing piece, wherein a guiding strip is arranged at the outer edge of the lifting piece, a guiding groove matched with the guiding strip is formed in the inner side of the guiding fixing piece, and the guiding fixing piece is fixedly connected with or integrally formed with the hollow supporting tube.

6. The lifting control device according to claim 1, wherein the lifting control device further comprises a hollow support tube, or the lifting control device is installed in a hollow support tube of a mechanical device; the driving source, the rope winding shaft, the lifting assembly and the turning pulley are accommodated in the inner cavity of the hollow supporting tube.

7. The lift control device of claim 6, wherein a rotary support is mounted around the lower end of the cable shaft and fixedly attached to the hollow support tube.

8. An elevating bed comprising an elevating control device as claimed in any one of claims 1 to 7.