Trolley base lifting device

Abstract

The utility model discloses a trolley base lifting device which comprises a lifting driving device, a transmission shaft, a bottom plate, a first module, a second module and two cross beams. The lifting driving device is installed on the bottom plate, and the first module and the second module are connected to the two ends of the transmission shaft respectively. The two cross beams correspond to the first module and the second module respectively, and universal wheels are fixedly installed on the two sides of each cross beam. The first module and the second module each comprise a transmission module connected with the bottom plate and the cross beam. The transmission module is arranged between the cross beam and the bottom plate, the transmission module drives the cross beam to move up and down so that the lifting distance of the bottom plate can be controlled, the trolley can be switched between the moving state and the fixed state, mode switching is easy and convenient, and operation is easy; the transmission shaft is in transmission connection with the transmission module through the transmission belt, the size of the trolley is reduced, and the utilization rate of the internal space of the trolley bottom plate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical robots, in particular to a trolley base lifting device. Background Art

[0002] Surgical robots are large medical devices that integrate multiple technologies such as medicine, biomechanics, mechanics, computer science, and microelectronics. Surgical robot trolleys usually use structures such as consoles, imaging systems, and robotic arms to assist doctors in their work, improve the efficiency and quality of medical services, reduce the labor intensity of manual handling, improve the accuracy and timeliness of transportation, and optimize the allocation of medical resources. However, surgical robot trolleys are usually heavy, and medical work has high requirements for the convenience of the trolley when moving and the stability when fixed. The mode switching structure designed in the prior art for switching between the mobile and fixed states of the surgical robot trolley is relatively complex. When the trolley is fixed, fixed legs and other similar technologies are generally used to fix the trolley. The switching steps between the mobile mode and the fixed mode of the trolley are cumbersome and time-consuming, and are prone to problems such as insufficient stability and shaking of the trolley base. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a trolley base lifting device, by setting a transmission module between the crossbeam and the bottom plate, the transmission module drives the bottom plate to move up and down, thereby realizing the adjustment of the distance between the bottom plate and the crossbeam, the trolley can realize the switching of the two modes of mobile state and stable state according to the actual needs of the user, and the switching of the mobile and fixed modes of the trolley is simple and easy to operate. And switching the trolley to a fixed state during the operation can increase the stability of the trolley, reduce the risk of the trolley moving due to external forces, and improve the safety of the operation.

[0004] The utility model provides a trolley base lifting device, comprising:

[0005] A lifting drive device, a transmission shaft, a base plate, a first module, a second module, and two cross beams; the lifting drive device is installed on the base plate, and provides driving force for the first module and the second module through the transmission shaft; the first module and the second module are respectively connected to the two ends of the transmission shaft, and the first module and the second module are symmetrically arranged with the center line of the base plate as the axis; the two cross beams are respectively arranged corresponding to the first module and the second module, and universal wheels are fixedly installed on both sides of each cross beam; the first module and the second module both include a transmission module connecting the base plate and the cross beam to adjust the distance between the base plate and the cross beam.

[0006] In a further technical solution, the transmission module includes a first transmission member and a second transmission member whose axes are perpendicular to each other, the transmission shaft, the first transmission member and the second transmission member are sequentially connected in transmission, one end of the second transmission member is fixedly arranged on the base plate, and the other end of the second transmission member is connected to the cross beam.

[0007] In a further technical solution, the first module and the second module both include a first synchronous wheel connected to the transmission shaft, and a second synchronous wheel connected to one end of the first transmission member close to the transmission shaft; the first synchronous wheel and the second synchronous wheel are connected by a transmission belt.

[0008] In a further technical solution, the first module and the second module both include a first transmission gear connected to the transmission shaft, and a second transmission gear connected to one end of the first transmission member close to the transmission shaft; the first transmission gear meshes with the second transmission gear for transmission.

[0009] In a further technical solution, a first transmission connecting member is provided on the crossbeam, and the first transmission connecting member is connected to the second transmission member.

[0010] In a further technical solution, the first module and the second module each include at least one guide rod, the guide rod connects the base plate and the cross beam, a guide rod connector is provided on the cross beam, and the guide rod connector is sleeved on the guide rod.

[0011] A further technical solution also includes a lifting distance control module, which includes a bracket, a sensing element and at least one sensing sheet, wherein the sensing element is installed on the beam, the bracket is installed on the base plate, and the extension direction of the bracket corresponds to the moving path of the sensing element; the sensing sheet is fixedly installed on the bracket, and the sensing element obtains the spacing information between the base plate and the beam when the beam moves to a position corresponding to the sensing sheet.

[0012] In a further technical solution, the number of the induction sheet is 1, and it is arranged at the top end or the bottom end of the bracket;

[0013] Alternatively, the number of the induction sheets is 2, and they are arranged at the top and bottom ends of the bracket.

[0014] In a further technical solution, the number of the induction sheets is at least three, and at least one of the induction sheets is disposed between the top end and the bottom end of the bracket.

[0015] In a further technical solution, an anti-slip pad is provided on the end surface of the bottom plate close to the ground.

[0016] The beneficial effects of the utility model are:

[0017] 1. By setting a transmission module between the crossbeam and the base plate, the transmission module drives the crossbeam to move up and down, thereby realizing the adjustment and control of the lifting distance of the universal wheel. When the universal wheel is in contact with the ground and the trolley is movable, the base plate moves downward under the driving action of the transmission module, and the distance between the crossbeam and the base plate increases until the base plate contacts the ground, and the universal wheel rises to a suspended state or flush with the bottom surface of the base plate, and the trolley realizes the mode switching from the mobile state to the fixed state. The trolley is simple to switch between the mobile and fixed modes and easy to operate. Moreover, switching the trolley to a fixed state during the operation can increase the stability of the trolley, reduce the risk of the trolley moving due to external forces, and improve the safety of the operation;

[0018] 2. The design of transmission belt transmission between the driving shaft and the transmission module of the trolley enables the lifting drive device to be set at the edge of the bottom plate, providing a larger installation space for other functional structures on the bottom plate of the trolley, reducing the volume of the trolley as a whole, reducing the footprint of the trolley, and improving the utilization rate of the internal space of the bottom plate of the trolley;

[0019] 3. A guide rod and a guide rod connector are arranged between the cross beam and the base plate. The guide rod and the guide rod connector cooperate to provide a guide for the vertical movement of the cross beam, further improve the stability of the universal wheel during the retraction or extension process, improve the balance stability of the base plate during the lifting process, and improve the safety and reliability of the trolley when switching modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a top view of the utility model;

[0022] Figure 2 It is a side view of the utility model;

[0023] Figure 3 It is a partial structural schematic diagram of the transmission module of the utility model.

[0024] Reference numerals:

[0025] 1. Lifting drive device; 2. Transmission shaft; 21. First synchronous wheel; 3. Bottom plate; 4. Crossbeam; 5. Transmission module; 51. First transmission member; 511. Second synchronous wheel; 52. Second transmission member; 53. First transmission connecting member; 6. Guide rod; 61. Guide rod connecting member; 7. Lifting distance control module; 71. Bracket; 72. Induction sheet; 73. Induction element; 8. Universal wheel. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] The orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In the present invention, unless otherwise clearly defined and specified, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or a connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The following further describes a preferred embodiment of the trolley base lifting device in conjunction with the accompanying drawings, but the following description is not intended to limit the trolley base lifting device in the present application.

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a trolley base lifting device, including a lifting drive device 1, a transmission shaft 2, a base plate 3, a first module, a second module, and two cross beams 4. The lifting drive device 1 is installed on the base plate 3, and provides driving force for the first module and the second module through the transmission shaft 2. The first module and the second module are respectively connected to the two ends of the transmission shaft 2, and the first module and the second module are symmetrically arranged with the center line of the base plate 3 as the axis. The two cross beams 4 are respectively arranged corresponding to the first module and the second module, and universal wheels 8 are fixedly installed on both sides of each cross beam 4. The first module and the second module both include a transmission module 5 connecting the base plate 3 and the cross beam 4 to adjust the distance between the base plate 3 and the cross beam 4.

[0032] The transmission shaft 2 can transmit the driving force of the lifting drive device 1 to the first module and the second module. Since the first module and the second module are connected through the transmission shaft 2, the transmission shaft 2 can drive the first module and the second module to move synchronously. The lifting drive device 1 can be any one of the power devices such as a servo motor, a cylinder or a motor. The present application does not specifically limit the structure of the lifting drive device 1. Specifically, the lifting drive device 1 drives the transmission shaft 2 to rotate, and the two ends of the transmission shaft 2 are respectively connected to the first module and the second module. Therefore, the first module and the second module move synchronously under the drive of the transmission shaft 2, ensuring the working consistency and synchronization of the first module and the second module.

[0033] The first module and the second module synchronously drive the cross beam 4 and the bottom plate 3 to make relative motion. Specifically, when the trolley is in a moving state, the universal wheel 8 contacts the ground to support the trolley, and the bottom plate 3 is in a suspended state. When the trolley is switched from a moving state to a fixed state, the lifting drive device 1 starts to work, the first module and the second module receive the driving force provided by the lifting drive device 1 and drive the bottom plate 3 to move downward, and the distance between the cross beam 4 and the bottom plate 3 increases until the bottom plate 3 contacts the ground. At this time, the trolley is supported by the bottom plate 3, and the trolley completes the switching from the moving state to the fixed state. The universal wheel 8 can be kept flush with the bottom surface of the bottom plate 3 as needed, or continue to rise to a suspended state to prevent the trolley from accidentally sliding. When the trolley is switched from a fixed state to a moving state, the lifting drive device 1 works, and the first module and the second module drive the cross beam 4 to move downward, thereby driving the universal wheel 8 to move downward. After the universal wheels 8 contact the ground to support the trolley, the base plate 3 moves up to a suspended state under the driving action of the first module and the second module, thereby realizing the switching of the trolley from a fixed state to a mobile state. The cross beam 4 and the base plate 3 of the trolley move relative to each other to realize the switching of the trolley between a stable state and a mobile state, so that the universal wheels 8 can extend out of the base plate 3 and contact the ground to move during the movement of the trolley. During the operation, the universal wheels 8 can be retracted so that the base plate 3 of the trolley is fixed on the ground to fix the trolley. During the operation, the base plate 3 of the trolley touches the ground, which can increase the stability of the trolley and reduce the risk of the trolley moving due to external forces. The switching between the mobile and fixed modes of the trolley is simple and easy to operate.

[0034] Optionally, the transmission module 5 includes a first transmission member 51 and a second transmission member 52 whose axes are perpendicular to each other. The transmission shaft 2, the first transmission member 51 and the second transmission member 52 are sequentially connected in transmission connection. One end of the second transmission member 52 is fixedly arranged on the bottom plate 3, and the other end of the second transmission member 52 is connected to the crossbeam 4. When the axis of the first transmission member 51 and the axis of the second transmission member 52 are perpendicular to each other, the size of the overall structure in the vertical direction can be reduced, and the space occupied by the device can be reduced. Preferably, as Figure 3 As shown, the present application takes a worm gear screw lift as an example to illustrate the above-mentioned transmission module 5. The above-mentioned first transmission member 51 can be a worm, and the above-mentioned second transmission member 52 can be a screw. The transmission shaft 2 is connected to the worm and provides a rotational driving force for the worm. The worm transmits the rotational driving force to the worm wheel, and the worm wheel is fixedly connected to the screw and performs rotational motion together.

[0035] It should be noted that in Figure 1In the illustrated embodiment, the first module and the second module both include a first synchronous wheel 21 connected to the transmission shaft 2, and a second synchronous wheel 511 connected to one end of the first transmission member 51 close to the transmission shaft 2, and the first synchronous wheel 21 and the second synchronous wheel 511 are connected by a transmission belt transmission, so that the first transmission member 51 and the transmission shaft 2 can move synchronously. When the transmission shaft 2 rotates under the drive of the lifting drive device 1, the transmission belt synchronously drives the first transmission member 51 to rotate, and the first transmission member 51 further transmits the rotational driving force of the transmission shaft 2 to the second transmission member 52, so that the second transmission member 52 starts to rotate, thereby realizing the relative movement between the crossbeam 4 and the bottom plate 3, and then enabling the user to switch between the two modes of the fixed state and the mobile state of the trolley according to actual needs. The design of the transmission belt transmission enables the lifting drive device 1 to be set at the edge of the plate surface of the bottom plate 3, providing a larger installation space for other functional structures inside the trolley, which can reduce the volume of the trolley as a whole, reduce the floor area of ​​the trolley, and improve the utilization rate of the internal space of the bottom plate 3 of the trolley. Furthermore, the use of a transmission belt transmission structure can adjust the length of the transmission belt according to actual needs, and adjust the distance of the transmission belt to adapt to base plates 3 of different sizes, thereby improving the scene adaptability of the trolley lifting device.

[0036] In another embodiment, the transmission shaft 2 is connected to the first transmission member 51 by a transmission gear. Specifically, the first module and the second module both include a first transmission gear connected to the transmission shaft 2, and a second transmission gear connected to one end of the first transmission member 51 close to the transmission shaft 2; the first transmission gear and the second transmission gear are meshed and transmitted, so that the first transmission member 51 and the transmission shaft 2 can move synchronously. When the transmission shaft 2 rotates under the drive of the lifting drive device 1, the first transmission gear and the second transmission gear are meshed and transmitted with each other, and synchronously drive the first transmission member 51 to rotate, and the first transmission member 51 further transmits the rotational driving force of the transmission shaft 2 to the second transmission member 52, so that the second transmission member 52 starts to rotate, thereby realizing the relative movement between the crossbeam 4 and the bottom plate 3, so that the user can switch the two modes of the trolley between the fixed state and the mobile state according to actual needs. Gear transmission is suitable for the case where the bottom plate 3 is small in area and the base space is compact, and the gear transmission is stable and reliable, which can improve the lifting stability of the bottom plate 3 of the trolley during the mode switching process.

[0037] Optionally, a first transmission connection member 53 is provided on the cross beam 4, and the first transmission connection member 53 is connected to the second transmission member 52. It should be understood that a through hole is provided at the center of the first transmission connection member 53 for installing the second transmission member 52, and the first transmission connection member 53 is used to transmit the transmission force of the second transmission member 52 to the cross beam 4, so as to drive the bottom plate 3 and the cross beam 4 to move relative to each other in the vertical direction.

[0038] Preferably, the first transmission connector 53 may be a screw nut, which is fixedly arranged on the crossbeam 4. Taking the transmission module 5 as a worm gear screw lift as an example, the screw nut cooperates with the screw to convert the rotational motion of the screw into the linear motion of the screw nut, so that the bottom plate 3 and the crossbeam 4 can move relative to each other in the vertical direction under the action of the transmission module 5. Specifically, when the trolley is changed from a mobile state to a fixed state, the bottom plate 3 moves downward under the driving action of the first transmission member 51 and the second transmission member 52, and the distance between the crossbeam 4 and the bottom plate 3 increases until the bottom plate 3 contacts the ground, and the universal wheel 8 is flush with the bottom surface of the bottom plate 3 or continues to rise to a suspended state, and the trolley realizes the switching from the mobile state to the fixed state. When the trolley is changed from a fixed state to a mobile state, the crossbeam 4 moves downward under the driving action of the first transmission member 51 and the second transmission member 52, and after the universal wheel 8 drops to contact the ground, the bottom plate 3 begins to move upward to a suspended state, thereby realizing the switching of the trolley from a stable state to a mobile state. The trolley moves by extending the universal wheels 8 out of the plane where the bottom plate 3 is located during the movement. During the operation, the universal wheels 8 are retracted above the plane where the bottom plate 3 is located to fix the bottom plate 3 of the trolley on the ground, so that the trolley remains stable when it does not need to move, and can be flexibly switched when the mode adjustment is required. The switching between the moving and fixed modes of the trolley is simple, labor-saving and easy to operate.

[0039] Optionally, an anti-skid pad is provided on the end surface of the bottom plate 3 close to the ground. It should be understood that the bottom plate 3 needs to contact the ground when the trolley is in a fixed state, and the anti-skid pad is provided on the side of the bottom plate 3 contacting the ground to increase the friction between the bottom plate 3 and the ground, that is, to further improve the stability of the trolley base when it is in a fixed state. The material selected for the anti-skid pad can be any one of silicone, rubber and other materials. Preferably, the surface of the anti-skid pad in contact with the ground is provided with raised anti-skid particles or raised anti-skid racks and other structures to improve the anti-skid effect of the anti-skid pad. When the bottom plate 3 of the trolley is in contact with the ground, that is, the trolley is in a stable state, the design of the anti-skid pad greatly reduces the movement and shaking of the trolley during surgery, and improves the safety of the trolley during use.

[0040] Optionally, the first module and the second module each include at least one guide rod 6, the guide rod 6 connects the bottom plate 3 and the cross beam 4, the cross beam 4 is provided with a guide rod connector 61, and the guide rod connector 61 is sleeved on the guide rod 6. Preferably, the first module and the second module are both provided with a guide rod 6, the guide rod 6 realizes the connection between the cross beam 4 and the bottom plate 3 through the guide rod connector 61, and when the cross beam 4 moves up and down under the driving action of the transmission module 5, the guide rod 6 has the function of providing vertical guidance for the cross beam 4. The balance stability of the bottom plate 3 and the cross beam 4 during the relative movement is ensured, and the safety and reliability of the use of the trolley are improved.

[0041] It should be noted that the guide rod connecting member 61 can be a bearing or other connecting member. Taking the guide rod connecting member 61 as a bearing as an example, a first mounting through hole is provided on the cross beam 4 to install the bearing. One end of the guide rod 6 is fixed on the base plate 3, and the other end of the guide rod 6 is installed in the bearing. When the cross beam 4 moves up and down under the driving action of the transmission module 5, the guide rod 6 and the bearing provide a guiding effect for the vertical movement of the cross beam 4, further improving the stability of the universal wheel 8 during the retraction or extension process, that is, improving the balance stability of the base plate 3 during the lifting process, and improving the safety and reliability of the trolley when in use.

[0042] It should be explained that the distance from the bottom end of the universal wheel 8 to the end face of the beam 4 away from the ground is l, and the distance from the end face of the bottom plate 3 close to the ground to the end face of the beam 4 away from the ground is h. When the bottom plate 3 moves to the ground, h≥l. It should be noted that when the bottom plate 3 moves to the ground, h≥l is the fixed state of the trolley base, and the bottom plate 3 abuts against the ground. When the bottom plate 3 abuts against the ground, h≥l can achieve the full retraction of the universal wheel 8 to ensure the stability of the trolley base when it abuts against the ground.

[0043] Optionally, a lifting distance control module 7 is also included, and the lifting distance control module 7 includes a bracket 71, a sensing element 73 and at least one sensing sheet 72. The sensing element 73 is installed on the crossbeam 4, and the bracket 71 is installed on the bottom plate 3, and the extension direction of the bracket 71 corresponds to the moving path of the sensing element 73. The sensing sheet 72 is fixedly installed on the bracket 71, and the sensing element 73 obtains the spacing information between the bottom plate 3 and the crossbeam 4 when the crossbeam 4 moves to the position corresponding to the sensing sheet 72. The above-mentioned sensing element 73 is used to cooperate with the above-mentioned sensing sheet 72 to realize the spacing control between the bottom plate 3 and the crossbeam 4. The lifting distance control module 7 is provided on the trolley base lifting device to control the spacing between the bottom plate 3 and the crossbeam 4. The above-mentioned sensing element 73 can be any one of the sensing elements such as sensors or sensing gratings. Preferably, taking the above-mentioned sensing element 73 as an example, the above-mentioned sensor is used to realize control by sensing the installation position of the sensing sheet 72, thereby realizing the mode switching between the moving state and the fixed state of the trolley. By providing the lifting distance control module 7, the lifting and lowering adjustment of the universal wheel 8 and the bottom plate 3 is realized, manual work is reduced, and the convenience and efficiency of mode switching are improved.

[0044] Preferably, the sensing element 73 is fixedly mounted on the cross beam 4, and the sensing sheet 72 is arranged on the moving path of the sensing element 73. The sensing element 73 always maintains a state of being arranged relative to the bracket 71 during the movement of the cross beam 4. It should be noted that the sensing element 73 needs to cooperate with the sensing sheet 72 to realize the control of the lifting distance of the bottom plate 3, so the sensing probe of the sensing element 73 needs to be arranged in the area corresponding to the sensing sheet 72, and the sensing element 73 can sense the position of the sensing sheet 72 to control the lifting movement of the bottom plate 3.

[0045] In one embodiment, the number of the sensing sheet 72 is 1, and it is arranged at the top or bottom of the bracket 71; or, the number of the sensing sheet 72 is 2, and it is arranged at the top and bottom of the bracket 71. Taking the above-mentioned sensing element 73 as a sensor as an example, when the number of the sensing sheet 72 is 1, the sensing sheet 72 can be arranged at the top of the bracket 71, and when the sensing element 73 is sensed, it indicates that the trolley is in a fixed state; the sensing sheet 72 can also be arranged at the bottom of the bracket 71, and when the sensing element 73 is sensed, it indicates that the trolley is in a moving state. Preferably, the number of the sensing sheets 72 can be 2, and they are respectively arranged at the top and bottom of the bracket 71, and the sensing sheet 72 close to the ground (bottom of the bracket) is used to limit the maximum distance that the above-mentioned universal wheel 8 extends from the above-mentioned bottom plate 3 to the ground, and the sensing sheet 72 arranged away from the ground (top of the bracket) is used to limit the retraction distance of the above-mentioned universal wheel 8. The distance between the bottom plate 3 and the cross beam 4 is measured through the induction between the sensing sheet 72 and the sensing element 73, and the movement of the two is controlled within a safe range, thereby realizing automatic adjustment of the trolley height and mode switching, reducing manual operations, and improving the lifting efficiency and safety of the trolley.

[0046] In another embodiment, the number of the above-mentioned sensing sheets 72 is at least three, and at least one sensing sheet 72 is arranged between the top and bottom ends of the bracket. Specifically, at least one sensing sheet 72 is arranged between the sensing sheets 72 arranged at the top and bottom ends of the bracket, and the sensing sheet arranged between the sensing sheets 72 at the top and bottom ends of the bracket 71 can be used to adjust the height of the trolley according to the habits of the trolley user, that is, to adjust the height of the universal wheel 8 extending from the above-mentioned bottom plate 3, thereby improving the scene adaptability and adjustment flexibility of the trolley.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A trolley base lifting device, characterized in that: include: A lifting drive device (1), a transmission shaft (2), a base plate (3), a first module and a second module, and two cross beams (4); The lifting drive device (1) is installed on the base plate (3) and provides driving force for the first module and the second module through the transmission shaft (2); The first module and the second module are respectively connected to two ends of the transmission shaft (2), and the first module and the second module are symmetrically arranged with the center line of the base plate (3) as the axis; The two cross beams (4) are respectively arranged corresponding to the first module and the second module, and universal wheels (8) are fixedly mounted on both sides of each cross beam (4); The first module and the second module both comprise a transmission module (5) connecting the base plate (3) and the cross beam (4) so ​​as to adjust the distance between the base plate (3) and the cross beam (4).

2. A trolley base lifting device according to claim 1, characterized in that: The transmission module (5) comprises a first transmission member (51) and a second transmission member (52) whose axes are perpendicular to each other; the transmission shaft (2), the first transmission member (51) and the second transmission member (52) are sequentially connected in transmission; one end of the second transmission member (52) is fixedly arranged on the base plate (3), and the other end of the second transmission member (52) is connected to the crossbeam (4).

3. A trolley base lifting device according to claim 2, characterized in that: The first module and the second module both comprise a first synchronous wheel (21) connected to the transmission shaft (2), and a second synchronous wheel (511) connected to an end of the first transmission member (51) close to the transmission shaft (2); the first synchronous wheel (21) and the second synchronous wheel (511) are connected via a transmission belt.

4. The trolley base lifting device according to claim 2, characterized in that: The first module and the second module both comprise a first transmission gear connected to the transmission shaft (2), and a second transmission gear connected to one end of the first transmission member (51) close to the transmission shaft (2); the first transmission gear meshes with the second transmission gear for transmission.

5. The trolley base lifting device according to claim 2, characterized in that: A first transmission connecting member (53) is provided on the crossbeam (4), and the first transmission connecting member (53) is connected to the second transmission member (52).

6. The trolley base lifting device according to claim 1, characterized in that: The first module and the second module each comprise at least one guide rod (6), the guide rod (6) connecting the base plate (3) and the crossbeam (4), the crossbeam (4) being provided with a guide rod connecting member (61), the guide rod connecting member (61) being sleeved on the guide rod (6).

7. The trolley base lifting device according to claim 1, characterized in that: The invention also comprises a lifting distance control module (7), wherein the lifting distance control module (7) comprises a bracket (71), a sensing element (73) and at least one sensing sheet (72), wherein the sensing element (73) is mounted on the crossbeam (4), the bracket (71) is mounted on the bottom plate (3), and the extension direction of the bracket (71) corresponds to the moving path of the sensing element (73); the sensing sheet (72) is fixedly mounted on the bracket (71), and the sensing element (73) obtains the spacing information between the bottom plate (3) and the crossbeam (4) when the crossbeam (4) moves to a position corresponding to the sensing sheet (72).

8. The trolley base lifting device according to claim 7, characterized in that: The number of the induction sheet (72) is one, and the induction sheet (72) is arranged at the top end or the bottom end of the bracket (71); Alternatively, the number of the induction sheets (72) is two, and they are arranged at the top and bottom ends of the bracket (71).

9. The trolley base lifting device according to claim 7, characterized in that: The number of the induction sheets (72) is at least three, wherein at least one of the induction sheets (72) is arranged between the top end and the bottom end of the bracket (71).

10. The trolley base lifting device according to claim 1, characterized in that: An anti-slip pad is arranged on the end surface of the bottom plate (3) close to the ground.

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