A puller

Abstract

The utility model discloses a kind of pullers, including base, first lifting mechanism, second lifting mechanism and the bearing device for bearing target object;The first lifting mechanism includes first pedestal and the first lifting seat that can be opposite first pedestal along lifting direction according to first preset single-stage adjustment distance multistage adjustment position;The second lifting mechanism includes second pedestal and the second lifting seat that can be opposite second pedestal along lifting direction according to second preset single-stage adjustment distance multistage adjustment position;The first pedestal is connected with the base, the first lifting seat is connected with the second pedestal, and the bearing device is installed in the second lifting seat;First preset single-stage adjustment distance is in lifting direction single-stage adjustment distance greater than or less than second preset single-stage adjustment distance in lifting direction single-stage adjustment distance.The puller can effectively solve the problem of poor lifting adjustment effect of current puller.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a lifting device. Background Technology

[0002] Wrist lifters are used to stabilize the hand during surgery. With the help of the equipment, the patient's hand or fingers are fixed to the hanger, so that when the patient is lying down, the arm is at a 90-degree angle to the body / operating table, which makes it easier for the doctor to perform the operation.

[0003] Existing medical stents generally have a primary lifting and adjustment mechanism to accommodate patients with different arm lengths. However, the current lifting and adjustment mechanism is relatively inconvenient during the adjustment process, especially for fine adjustments, making it difficult to achieve a position that puts both patients and doctors in a comfortable position.

[0004] In conclusion, how to effectively solve the problem of poor lifting and lowering adjustment of the current lifting device is an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a lifting device that can effectively solve the problem of poor lifting and adjusting effect of current lifting devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lifting device includes a base, a first lifting mechanism, a second lifting mechanism, and a support device for carrying a target object; the first lifting mechanism includes a first base and a first lifting seat capable of being adjusted in multiple stages relative to the first base along the lifting direction by a first preset single-stage adjustment distance; the second lifting mechanism includes a second base and a second lifting seat capable of being adjusted in multiple stages relative to the second base along the lifting direction by a second preset single-stage adjustment distance; the first base is connected to the base, the first lifting seat is connected to the second base, and the support device is installed on the second lifting seat; the first preset single-stage adjustment distance in the lifting direction is greater than or less than the second preset single-stage adjustment distance in the lifting direction.

[0008] In the aforementioned lifting device, because the first preset single-stage adjustment distance in the lifting direction is greater than or less than the second preset single-stage adjustment distance in the lifting direction, one of the first lifting mechanism and the second lifting mechanism is a fine-tuning mechanism, and the other is a coarse-tuning mechanism. In use, the target object is supported by the carrying device, then the coarse-tuning mechanism is adjusted, followed by the fine-tuning mechanism, to bring the carrying device to the target position. Two sets of lifting mechanisms with different single-stage adjustment distances are provided between the carrying device and the base, serving as fine-tuning and coarse-tuning mechanisms respectively. The coarse-tuning mechanism provides initial adjustment, while the fine-tuning mechanism provides precise adjustment to a more accurate position, improving the adjustment speed and resulting in better lifting adjustment performance. In summary, this lifting device effectively solves the problem of poor lifting adjustment performance in current lifting devices.

[0009] In some embodiments, in the lifting direction, the first preset single-stage adjustment distance is greater than the second preset single-stage adjustment distance.

[0010] In some embodiments, the second base includes at least one guide rod movable in a lifting direction, at least one of the guide rods being provided with lifting teeth. The second lifting base includes a base body and a locking member movably connected to the base body. The locking member has locking teeth that cooperate with the lifting teeth. When the locking member is moved to a first position, the locking teeth and the lifting teeth cooperate and abut against each other in the lifting direction to prevent the base body from moving relative to the guide rod in an upward and / or downward direction. When the locking member is moved to a second position, the locking teeth are displaced from the lifting teeth to allow the base body to move relative to the guide rod in the lifting direction.

[0011] In some embodiments, the locking member is rotatably mounted on the base to be movable between the first position and the second position; a first elastic device is provided between the locking member and the base to prevent the locking member from disengaging from the first position to move to the second position; the second lifting seat includes a release handle rotatably mounted on the base to push the locking member against the elastic force of the first elastic device to move to the second position when the release handle is pressed.

[0012] In some embodiments, a ratchet-pawl transmission mechanism is formed between the locking member and the lifting tooth to lock the seat body when it moves in the downward direction relative to the guide rod; while when the seat body moves in the upward direction relative to the guide rod, the inclined surface on one side of the lifting tooth can guide the first elastic device to adapt to deformation so that the locking member can move to the second position.

[0013] In some embodiments, the second lifting seat includes a rotatable operating handle, a lifting buckle that engages with the lifting teeth, and a second elastic device for pushing the lifting buckle to slide upward along the guide rod. When the handle is rotated, it can push the seat body to move upward along the guide rod.

[0014] In some embodiments, the second base includes a top plate and a bottom plate, the top plate and the bottom plate being provided with three guide rods, one of the three guide rods being provided with the lifting teeth.

[0015] In some embodiments, the first base is a first rod, the first lifting seat is a second rod, the first rod is a tube, and the second rod is inserted into the cavity of the first rod to achieve a sliding fit to achieve lifting and lowering movement in the lifting direction; the first rod and the second rod are limited by an elastic pin and a pin hole to prevent movement in the lifting direction.

[0016] In some embodiments, the base has a hinge seat, and the first base has a pin hole that mates with the hinge shaft of the hinge seat. The pin hole extends in an elongated shape along the lifting direction so that the first base can move along the lifting direction to an insertion position and a disengagement position. When the first base moves to the insertion position, it can be inserted into the base along the lifting direction to prevent the first base from rotating relative to the base. When the first base moves to the disengagement position, it can disengage from the base along the lifting direction so that the first base can rotate relative to the base.

[0017] In some embodiments, the support device is a hanging rod for lifting the wrist joint. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the lifting device provided in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the bottom cross-sectional structure of the lifter provided in an embodiment of the present utility model;

[0021] Figure 3 A schematic diagram of the bottom partial structure of the lifter provided in an embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the upper structure of the lifting device provided in an embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the upper internal structure of the lifter provided in an embodiment of this utility model.

[0024] The following labels are shown in the attached diagram:

[0025] 1. Base; 2. First lifting mechanism; 3. Second lifting mechanism; 4. Supporting device;

[0026] Plate 1-1, hinge seat 1-2, insertion hole 1-3;

[0027] First base 2-1, first lifting seat 2-2, elastic pin 2-3, pin hole 2-4, hinge hole 2-5;

[0028] Second base 3-1, second lifting seat 3-2;

[0029] Guide rod 3-11, lifting gear 3-12, top plate 3-13, bottom plate 3-14, plug-in column 3-15;

[0030] 3-21. Seat body 3-22. Locking element 3-23. Locking tooth 3-24. First elastic device 3-25. Release handle 3-26. Operating handle 3-27. Lifting buckle 3-28. Second elastic device 3-29.

[0031] The first preset single-stage adjustment distance is h1; the second preset single-stage adjustment distance is h2. Detailed Implementation

[0032] This utility model discloses a lifting device to effectively solve the problem of poor lifting and adjusting effect of current lifting devices.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-5 , Figure 1 This is a schematic diagram of the structure of the lifting device provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the bottom cross-sectional structure of the lifter provided in an embodiment of the present utility model; Figure 3 A schematic diagram of the bottom partial structure of the lifter provided in an embodiment of this utility model; Figure 4 A schematic diagram of the upper structure of the lifting device provided in an embodiment of this utility model; Figure 5 A schematic diagram of the upper internal structure of the lifting device provided in this embodiment of the utility model.

[0035] In some embodiments, a lifting device is provided, such as a wrist joint lifting device, or a device for lifting a target object. Specifically, the lifting device may mainly include a base 1, a first lifting mechanism 2, a second lifting mechanism 3, and a support device 4, wherein the support device 4 is such as a wrist joint support device to keep the wrist joint in a lifted state, specifically, the support device 4 is such as a hanging rod.

[0036] The first lifting mechanism 2 includes a first base 2-1 and a first lifting seat 2-2. The first lifting seat 2-2 can be adjusted in multiple stages relative to the first base 2-1 along the lifting direction by a first preset single-stage adjustment distance. In this context, "multiple-stage adjustment positions" refers to at least two adjustment stages, and generally more than five. The single-stage adjustment distance refers to the distance between two adjacent positions, especially in the lifting direction; there may be deviations in the adjustment distance of each stage in the lifting direction. If the first preset single-stage adjustment distance is equal at each stage, such as h1 cm, when the first lifting seat 2-2 and the first base 2-1 are relatively fixed, the first lifting seat 2-2 can move h1 cm relative to the first base 2-1 in the lifting direction and then continue to maintain the relative fixed position of the first lifting seat 2-2 and the first base 2-1 to maintain a supported state. The first preset single-stage adjustment distance can be the distance between adjacent pin holes 2-4 as described below.

[0037] The second lifting mechanism 3 includes a second base 3-1 and a second lifting seat 3-2. The second lifting seat 3-2 can adjust its position relative to the second base 3-1 in multiple stages along the lifting direction according to a second preset single-stage adjustment distance. If the second preset single-stage adjustment distance is equal at each stage, such as h2 cm, when the second lifting seat 3-2 and the second base 3-1 are relatively fixed, the second lifting seat 3-2 can move h2 cm relative to the second base 3-1 in the lifting direction and then continue to maintain the relative fixed position of the second lifting seat 3-2 and the second base 3-1 to maintain the supported state. The second preset single-stage adjustment distance can be the distance between adjacent lifting teeth 3-12 as described below.

[0038] The first base 2-1 is connected to the base 1, and the first lifting seat 2-2 is connected to the second base 3-1. This allows the first lifting mechanism 2 to adjust the distance between the second base 3-1 and the base 1 in the lifting direction, thereby adjusting the positional relationship of the bearing device 4 relative to the base 1 in the lifting direction. The bearing device 4 is installed on the second lifting seat 3-2, and the second lifting mechanism 3 adjusts the distance between the bearing device 4 and the first lifting seat 2-2 in the lifting direction, thereby adjusting the distance between the bearing device 4 and the base 1 in the lifting direction. The lifting direction is generally up and down, but it can be other directions as well. The first lifting mechanism 2 and the second lifting mechanism 3 should be able to lift in the same direction, but they do not need to be completely identical. For example, the angle between the lifting direction of the second lifting mechanism 3 and the lifting direction of the first lifting mechanism 2 should be less than 90 degrees. Preferably, the lifting direction of the second lifting mechanism 3 is the same as that of the first lifting mechanism 2.

[0039] The first preset single-stage adjustment distance in the lifting direction is greater than or less than the second preset single-stage adjustment distance in the lifting direction, i.e., h1 > h2 or h1 < h2, so that one of the first lifting mechanism 2 and the second lifting mechanism 3 is a coarse adjustment mechanism and the other is a fine adjustment mechanism. If the first preset single-stage adjustment distance in the lifting direction is less than the second preset single-stage adjustment distance in the lifting direction, then the first lifting mechanism 2 is a fine adjustment mechanism and the second lifting mechanism 3 is a coarse adjustment mechanism; conversely, if the first preset single-stage adjustment distance in the lifting direction is greater than the second preset single-stage adjustment distance in the lifting direction, then the second lifting mechanism 3 is a fine adjustment mechanism and the first lifting mechanism 2 is a coarse adjustment mechanism. Generally, for ease of adjustment, the first preset single-stage adjustment distance can be between four and ten times the second preset single-stage adjustment distance, and at this time, the total adjustable stroke length of the second lifting seat 3-2 relative to the second base 3-1 in the lifting direction is not less than the first preset single-stage adjustment distance, to ensure better fine adjustment.

[0040] In the aforementioned lifting device, because the first preset single-stage adjustment distance in the lifting direction is greater than or less than the second preset single-stage adjustment distance in the lifting direction, one of the first lifting mechanism 2 and the second lifting mechanism 3 is a fine-tuning mechanism and the other is a coarse-tuning mechanism. In use, the target object is supported by the carrying device 4, then the coarse-tuning mechanism is adjusted, followed by the fine-tuning mechanism, so that the carrying device 4 reaches the target position. Two sets of lifting mechanisms with different single-stage adjustment distances are provided between the carrying device 4 and the base 1, serving as fine-tuning and coarse-tuning mechanisms respectively. The coarse-tuning mechanism provides initial adjustment, while the fine-tuning mechanism provides precise adjustment to a more accurate position, increasing the adjustment speed and improving the lifting device's lifting adjustment effect. In summary, this lifting device effectively solves the problem of poor lifting adjustment effect in current lifting devices.

[0041] In some embodiments, the first preset single-stage adjustment distance in the lifting direction may be greater than the second preset single-stage adjustment distance, thus making the first lifting mechanism 2 a coarse adjustment mechanism and the second lifting mechanism 3 a fine adjustment mechanism. Generally, the operator's hands are closer to the bearing device 4, and placing the fine adjustment mechanism on the side closer to the bearing device 4 makes operation more convenient and simple for the operator.

[0042] In some embodiments, the second base 3-1 may include at least one guide rod 3-11 that moves in the lifting direction, and at least one guide rod 3-11 may be provided with lifting teeth 3-12; that is, if only one guide rod 3-11 is provided, then the guide rod 3-11 is provided with lifting teeth 3-12; if two or more guide rods 3-11 are provided, only one guide rod 3-11 may be provided with lifting teeth 3-12, while some or all of the remaining guide rods 3-11 may be provided with lifting teeth 3-12 or none of them may be provided with lifting teeth 3-12.

[0043] The second lifting seat 3-2 includes a seat body 3-21 and a locking member 3-22 movably connected to the seat body 3-21, so that the locking member 3-22 can move relative to the seat body 3-21 to a first position or a second position. The locking member 3-22 and the seat body 3-21 can be movably connected, such as by rotation or sliding.

[0044] The locking element 3-22 has a locking tooth 3-23 that engages with the lifting tooth 3-12. When the locking element 3-22 moves to the first position, the locking tooth 3-23 and the lifting tooth 3-12 engage in the lifting direction to prevent the seat 3-21 from moving relative to the guide rod 3-11 in the upward and / or downward directions. As shown in the attached figure, when the locking element 3-22 moves to the first position, the locking tooth 3-23 and the lifting tooth 3-12 engage in the lifting direction to prevent the seat 3-21 from moving relative to the guide rod 3-11 in the downward direction, thus providing support. However, in the upward direction, there is no restriction, allowing free movement. Of course, relative movement can also be restricted in both the upward and downward directions simultaneously. It should be noted that, for ease of explanation of its structural relationship, one direction of the lifting direction is the upward direction, and the other direction is the downward direction; when the lifting direction is vertical, the upward direction is the upward direction, and the downward direction is the downward direction.

[0045] When the locking member 3-22 moves to the second position, the locking tooth 3-23 and the lifting tooth 3-12 are misaligned to avoid the lifting tooth 3-12, so that the seat 3-21 can move relative to the guide rod 3-11 in the lifting direction to facilitate movement adjustment and / or reset.

[0046] When adjustment is needed, the locking element 3-22 is moved to the second position, at which point the base 3-21 can move up and down to adjust to the target position or reset. Moving the locking element 3-22 to the first position achieves locking, at which point the base 3-21 can no longer move relative to the guide rod 3-11, i.e., relative to the second base 3-1, in the corresponding direction. Through the engagement of the lifting gear 3-12, the second preset single-stage adjustment distance can be made sufficiently small to facilitate higher precision adjustments.

[0047] In some embodiments, for ease of operation, the locking element 3-22 can be rotatably mounted on the base 3-21 so that it can move between a first position and a second position, that is, it can rotate from the first position to the second position and from the second position to the first position.

[0048] Specifically, a first elastic device 3-24 can be provided between the locking member 3-22 and the seat 3-21 to prevent the locking member 3-22 from disengaging from the first position to move to the second position, so as to keep it in the first position.

[0049] In some embodiments, for ease of operation, the second lifting seat 3-2 preferably includes a release handle 3-25 rotatably mounted on the seat body 3-21, so that when the release handle 3-25 is pressed during operation, it can push the locking member 3-22 to overcome the elastic force of the first elastic device 3-24 and move to the second position for ease of operation.

[0050] One specific connection method, but not limited to this, is as follows: Locking member 3-22 can be a locking rod. One end of locking member 3-22 is the locking end, and it is provided with locking teeth 3-23. The middle part is hinged to the base 3-21, and the other end is the force-bearing end, connected to the upper end of the first elastic device 3-24. The first elastic device 3-24 is a tension spring, and the lower end of the first elastic device 3-24 is connected to the base 3-21 to prevent the force-bearing end from moving upward. That is, based on the lever principle, it can prevent the locking end of locking member 3-22 from moving downward. The upward rotation of the locking end can be directly or indirectly prevented by the corresponding structure on the base 3-21. As shown in the attached figure, locking member 3-22 in the first position can directly prevent the force-bearing end from moving downward through the support part on the base 3-21. The release handle 3-25 has an operating end at one end for easy pressure application, and the other end abuts against the force-bearing end of locking member 3-22, with the middle part hinged to the base 3-21. When the locking element 3-22 is in the first position, when the operating end is subjected to downward pressure, the actuating end moves upward, overcoming the deformation tension of the first elastic device 3-24, pushing the force-bearing end upward, while the locking end moves downward, until the locking tooth 3-23 disengages from the lifting tooth 3-12, at which point the locking element 3-22 enters the second position.

[0051] In some embodiments, a ratchet-pawl transmission mechanism can be formed between the locking member 3-22 and the lifting tooth 3-12 to achieve locking when the seat 3-21 moves in the descending direction relative to the guide rod 3-11; while when the seat 3-21 moves in the ascending direction relative to the guide rod 3-11, the inclined surface on one side of the lifting tooth 3-12 can guide the first elastic device 3-24 to adapt to deformation, so that the locking member 3-22 can move to the second position. Specifically, as shown in the figure, when the seat 3-21 moves upward, the upper side of the locking tooth 3-23 abuts against the downward inclined surface corresponding to the lifting tooth 3-12, so that the locking end is subjected to a downward force, pushing the locking member 3-22 to rotate. At this time, as long as the force is large enough to overcome the elastic force of the first elastic device 3-24, the locking member 3-22 can be pushed to rotate out of the second position. Then the seat 3-21 can continue to move upward until the locking tooth 3-23 corresponds to the previous tooth groove. Under the action of the first elastic device 3-24, the locking end moves upward to enter the tooth groove.

[0052] Of course, the first elastic device 3-24 mentioned above can also be a compression elastic device, and the locking end and the force-bearing end of the locking member 3-22 can also be located on one side of the hinge shaft. Similarly, the action end and the operation end can also be located on one side of the hinge shaft.

[0053] In some embodiments, for ease of operation, the second lifting seat 3-2 may include a rotatable operating handle 3-26, a lifting buckle 3-27 that engages with the lifting gear 3-12, and a second elastic device 3-28 for pushing the lifting buckle 3-27 to slide upward along the guide rod 3-11. When the operating handle 3-26 is rotated, it can push the seat body 3-21 to move upward along the guide rod 3-11. That is, based on the engagement relationship between the lifting buckle 3-27 and the lifting gear 3-12, when the operating handle 3-26 is rotated, a driving force is generated to push the seat body 3-21 upward.

[0054] Specifically, when the operating handle 3-26 is rotated relative to the second lifting seat 3-2 in a preset direction (counterclockwise as shown in the attached diagram), it can push the lifting buckle 3-27 to move relative to the seat 3-21 in the downward direction.

[0055] The second elastic device 3-28 deforms elastically, and because the lifting buckle 3-27 abuts against the lifting tooth 3-12, it cannot move downward relative to the lifting tooth 3-12. At this time, it pushes the seat 3-21 and the locking piece 3-22 to move upward. When the operating handle 3-26 is released, under the elastic force of the second elastic device 3-28, the operating handle 3-26 rotates in the opposite direction (clockwise) of the preset direction. At the same time, the lifting buckle 3-27 moves upward relative to the seat 3-21. Because the locking piece 3-22 abuts against the lifting tooth 3-12, the seat 3-21 cannot move downward, so it pushes the lifting buckle 3-27 to move upward. Due to the guide slope, the lifting buckle 3-27 can move upward along the lifting tooth 3-12. The lifting buckle 3-27 can be equipped with a lateral floating elastic structure. By abutting against the lifting tooth 3-12, it prevents the lifting buckle 3-27 from descending relative to the lifting tooth 3-12. When the lifting buckle 3-27 moves upward, the lateral floating elastic structure abuts against the upper inclined surface, pushing the lateral floating elastic structure to avoid the lifting tooth 3-12, thereby allowing it to move upward relative to the lifting tooth 3-12. Alternatively, the lifting buckle 3-27 can be allowed to float laterally.

[0056] In some embodiments, for ease of fixing, the second base 3-1 may include a top plate 3-13 and a bottom plate 3-14, wherein the top plate 3-13 and the bottom plate 3-14 are provided with three guide rods, one of which is provided with a lifting tooth 3-12. For ease of installation, the bottom of the bottom plate 3-14 may have an insert post for inserting into the first lifting seat 2-2 and for connection by a resilient locking pin to prevent disengagement.

[0057] In some embodiments, the first base 2-1 can be the first rod, and the first lifting seat 2-2 can be the second rod. The first rod and the second rod are slidably engaged with each other along the lifting direction. The first rod and the second rod are engaged through a group of elastic pins 2-3 arranged in an array along the lifting direction. The group of elastic pins 2-3 can include one pin hole 2-4 and multiple elastic pins 2-3, or it can be a combination of multiple pin holes 2-4 and one elastic pin 2-3, or multiple pin holes 2-4 and multiple elastic pins 2-3. When the elastic pin 2-3 is inserted into the pin hole 2-4, it prevents the first rod and the second rod from sliding relative to each other. When the elastic pin 2-3 is pressed to be able to withdraw from the pin hole 2-4, the first rod and the second rod can move relative to each other. The first rod and the second rod can be engaged in the form of a slider, or they can be engaged in a sliding fit by a sleeved fit. For example, if the first rod is a tube and the second rod is inserted into the tube cavity, both can be square tubes or both can be round tubes. For ease of setup, the first rod has multiple pin holes 2-4, and the second rod has one elastic pin 2-3. Alternatively, to ensure the strength of the first rod and facilitate cleaning, the first rod can have one elastic pin 2-3, and the second rod can have multiple pin holes 2-4.

[0058] In some embodiments, for ease of storage, the base 1 may have a hinge seat 1-2, and the first base 2-1 may have a hinge hole 2-5 that mates with the hinge shaft of the hinge seat 1-2. The hinge hole 2-5 extends in the lifting direction as an elongated hole so that the first base 2-1 can move in the lifting direction to an insertion position and a disengagement position. When the first base 2-1 moves to the insertion position, it can be inserted into the base 1 in the lifting direction to prevent the first base 2-1 from rotating relative to the base 1. When the first base 2-1 moves to the disengagement position, it can disengage from the base 1 in the lifting direction so that the first base 2-1 can rotate relative to the base 1 for easy storage. As shown in the figure, the base 1 includes a plate 1-1 and a hinge seat 1-2. The plate 1-1 has an insertion hole 1-3 that mates with the first base 2-1, and the two side ears of the hinge seat 1-2 are located on both sides of the insertion hole 1-3. When the first rod is inserted into the insertion hole 1-3, the first rod is perpendicular to the plate 1-1. When the first rod is removed from the insertion hole 1-3, the first rod can rotate to be parallel to the plate 1-1.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting device, characterized in that, The device includes a base (1), a first lifting mechanism (2), a second lifting mechanism (3), and a support device (4) for carrying the target object. The first lifting mechanism (2) includes a first base (2-1) and a first lifting seat (2-2) that can be adjusted in multiple stages relative to the first base (2-1) along the lifting direction by a first preset single-stage adjustment distance. The second lifting mechanism (3) includes a second base (3-1) and a second lifting seat (3-2) that can be adjusted in multiple stages relative to the second base (3-1) along the lifting direction by a second preset single-stage adjustment distance. The first base (2-1) is connected to the base (1), the first lifting seat (2-2) is connected to the second base (3-1), and the support device (4) is installed on the second lifting seat (3-2). The first preset single-stage adjustment distance in the lifting direction is greater than or less than the second preset single-stage adjustment distance in the lifting direction.

2. The lifting device according to claim 1, characterized in that, In the lifting direction, the first preset single-stage adjustment distance is greater than the second preset single-stage adjustment distance.

3. The lifting device according to claim 1, characterized in that, The second base (3-1) includes at least one guide rod (3-11) movable in the lifting direction, and at least one of the guide rods (3-11) is provided with a lifting tooth (3-12). The second lifting seat (3-2) includes a seat body (3-21) and a locking member (3-22) movably connected to the seat body (3-21). The locking member (3-22) has a locking tooth (3-23) that cooperates with the lifting tooth (3-12). When the locking member (3-22) is moved to a first position, the locking tooth (3-23) and the lifting tooth (3-12) cooperate and abut in the lifting direction to prevent the seat body (3-21) from moving relative to the guide rod (3-11) in the rising direction and / or falling direction. When the locking member (3-22) is moved to a second position, the locking tooth (3-23) and the lifting tooth (3-12) are displaced so that the seat body (3-21) moves relative to the guide rod (3-11) in the lifting direction.

4. The lifting device according to claim 3, characterized in that, The locking element (3-22) is rotatably mounted on the base (3-21) to be movable between the first position and the second position; a first elastic device (3-24) is provided between the locking element (3-22) and the base (3-21) to prevent the locking element (3-22) from disengaging from the first position to move to the second position; the second lifting seat (3-2) includes a release handle (3-25) rotatably mounted on the base (3-21) to push the locking element (3-22) against the elastic force of the first elastic device (3-24) to move to the second position when the operation of the release handle (3-25) is pressed.

5. The lifting device according to claim 4, characterized in that, A ratchet-pawl transmission mechanism is formed between the locking member (3-22) and the lifting tooth (3-12) to lock the seat (3-21) when it moves in the downward direction relative to the guide rod (3-11); and when the seat (3-21) moves in the upward direction relative to the guide rod (3-11), the inclined surface on one side of the lifting tooth (3-12) can guide the first elastic device (3-24) to adapt to deformation so that the locking member (3-22) can move to the second position.

6. The lifting device according to claim 3, characterized in that, The second lifting seat (3-2) includes a rotatable operating handle (3-26), a lifting buckle (3-27) that cooperates with the lifting gear (3-12), and a second elastic device (3-28) for pushing the lifting buckle (3-27) to slide upward along the guide rod (3-11). When the operating handle (3-26) is rotated, it can push the seat body (3-21) to move upward along the guide rod (3-11).

7. The lifting device according to claim 3, characterized in that, The second base (3-1) includes a top plate (3-13) and a bottom plate (3-14). The top plate (3-13) and the bottom plate (3-14) are provided with three guide rods (3-11), and one of the three guide rods (3-11) is provided with the lifting tooth (3-12).

8. The lifting device according to claim 1, characterized in that, The first base (2-1) is the first rod body, and the first lifting seat (2-2) is the second rod body. The first rod body is a pipe fitting, and the second rod body is inserted into the cavity of the first rod body to achieve a sliding fit so as to achieve lifting and lowering movement in the lifting direction. The first rod body and the second rod body are limited by an elastic pin (2-3) and a pin hole (2-4) to prevent movement in the lifting direction.

9. The lifting device according to claim 1, characterized in that, The base (1) has a hinge seat (1-2), and the first base (2-1) has a hinge hole (2-5) that cooperates with the hinge shaft of the hinge seat (1-2). The hinge hole (2-5) extends in the lifting direction as an elongated hole so that the first base (2-1) can move in the lifting direction to the insertion position and the disengagement position. When the first base (2-1) moves to the insertion position, it can be inserted into the base (1) in the lifting direction to prevent the first base (2-1) from rotating relative to the base (1). When the first base (2-1) moves to the disengagement position, it can disengage from the base (1) in the lifting direction so that the first base (2-1) can rotate relative to the base (1).

10. The lifting device according to claim 1, characterized in that, The support device (4) is a hanging rod used to lift the wrist joint.

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