Lifting drive device

Abstract

The present invention relates to the technical field of power devices, and in particular to a lifting drive device. The lifting drive device comprises: a base, a drive motor, a driving wheel, a driven wheel, a steel belt, and a rocker arm, wherein the rocker arm comprises a connecting portion and a rotating portion; the drive motor is connected to the base, the output shaft of the drive motor is in transmission connection with the driving wheel, the driving wheel is in transmission connection with the driven wheel, one end of the steel belt is connected to the driven wheel, the other end of the steel belt is connected to the connecting portion, the rotating portion is rotatably connected to the base, and the rocker arm is provided with a connecting member for connecting to a driven member.

Description

Technical Field

[0001] The present invention relates to the technical field of power devices, and in particular to a lifting drive device. Background Art

[0002] At present, common lifting drive mechanisms include screw mechanisms, gear rack mechanisms or pulley mechanisms, but for equipment with high integration requirements, small lifting range (for example: -2mm-+2mm) and small installation space, the common lifting drive mechanism structure is not compact enough and occupies a large space. Summary of the Invention

[0003] The object of the present invention is to provide a lifting drive device to solve, to a certain extent, the technical problem in the prior art that the lifting drive mechanism occupies a large space.

[0004] The present invention provides a lifting drive device, comprising: a base, a driving motor, a driving wheel, a driven wheel, a steel belt and a rocker arm, wherein the rocker arm comprises a connecting part and a rotating part; the driving motor is connected to the base, the output shaft of the driving motor is transmission-connected to the driving wheel, the driving wheel is transmission-connected to the driven wheel, one end of the steel belt is connected to the driven wheel, the other end of the steel belt is connected to the connecting part, the rotating part is rotationally connected to the base, and the rocker arm is provided with a connecting part for connecting to a driven part.

[0005] When the driving motor is working, the output shaft can drive the driving wheel to rotate, and the driving wheel drives the driven wheel to rotate, and the driven wheel spreads or rolls up the steel belt, thereby realizing the extension and contraction of the steel belt. The connecting part of the rocker arm is connected to the steel belt, and the rotating part of the rocker arm is rotatably connected to the base. The steel belt extends and contracts, thereby driving the connecting part to descend or lift, thereby making the rotating part of the rocker arm rotate relative to the base, that is, the entire rocker arm realizes rotation relative to the base, and all parts of the rocker arm except the rotating point connected to the base rotation are moved in the length direction of the steel belt, that is, they move upward in the lifting direction of the driven part; the part of the rocker arm located on the side of the rotating part close to the connecting part descends with the elongation of the steel belt and rises with the contraction of the steel belt, while the part of the rocker arm located on the side of the rotating part away from the connecting part rises with the elongation of the steel belt and descends with the contraction of the steel belt; thus, the connecting part arranged on the rocker arm can be raised and lowered, thereby driving the driven part connected to the connecting part to rise and fall. Among them, the steel belt is expanded and contracted by rolling up or spreading out the steel belt, thereby reducing the size in the lifting direction and the space occupied in the lifting direction, making the lifting drive device compact in structure, occupying less space and having a high degree of integration; the rocker arm structure is used to realize lifting drive, which can be suitable for small-range lifting and precise control.

[0006] Furthermore, the connecting member is rotationally connected to the rocker arm, and the outer contour of the connecting member for abutting against the driven member is in an arc shape.

[0007] Furthermore, the connecting member is a bearing.

[0008] Furthermore, the connecting portion and the rotating portion are respectively located at two ends of the rocker arm, the connecting member is located between the connecting portion and the rotating portion, and the connecting member is arranged close to the rotating portion.

[0009] Furthermore, the base includes a rocker arm bracket and a motor bracket that are connected to each other; the rocker arm bracket and the motor bracket are respectively provided with through holes, the rotating part is rotatably connected to the rocker arm bracket, the driving motor is connected to the motor bracket, the driven wheel is rotatably connected to the motor bracket, the driving wheel and the steel belt are both located in the motor bracket, and the connecting part passes through the through hole and extends into the motor bracket to be connected to the steel belt.

[0010] Furthermore, in the length direction of the steel belt, a connecting groove is provided on one side of the rocker arm bracket, and a mounting groove is provided on the other side of the rocker arm bracket, and the rocker arm is rotatably connected in the mounting groove.

[0011] Furthermore, the lifting drive device also includes a lower limit member arranged on the base, the lower limit member is located in the descending direction of the connecting part, and the lower limit member can contact the connecting part to prevent the connecting part from continuing to descend.

[0012] Furthermore, the lower limiting member includes a limiting nail, and the limiting nail is fixed on the side wall of the rocker arm bracket close to the motor bracket.

[0013] Furthermore, the base further comprises a sealing cover, which is detachably connected to the opening of the mounting groove, and the lower limiting member comprises a limiting block provided on the sealing cover.

[0014] Furthermore, the lifting drive device also includes a synchronous belt, the driving wheel is coaxially fixed with the output shaft of the driving motor, and the synchronous belt is connected between the driving wheel and the driven wheel.

[0015] It should be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily limiting of the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. Together, the description and the drawings serve to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a lifting drive device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional view of the lifting drive device shown;

[0019] Figure 3 This is a cross-sectional view of a lifting drive device according to another embodiment of the present invention.

[0020] Icons: 10-rocker arm bracket; 20-motor bracket; 30-drive motor; 40-driving pulley; 50-driven pulley; 60-steel belt; 70-rocker arm; 80-connecting part; 90-sealing cover; 100-synchronous belt; 110-driven part; 120-limiting pin; 130-limiting block; 11-connecting groove; 12-installing groove; 13-strip groove; 71-connecting part; 72-rotating part. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] like Figure 1 and Figure 2 As shown, the present invention provides a lifting drive device, including: a base, a driving motor 30, a driving wheel 40, a driven wheel 50, a steel belt 60 and a rocker arm 70, the rocker arm 70 includes a connecting part 71 and a rotating part 72; the driving motor 30 is connected to the base, the output shaft of the driving motor 30 is transmission-connected to the driving wheel 40, the driving wheel 40 is transmission-connected to the driven wheel 50, one end of the steel belt 60 is connected to the driven wheel 50, the other end of the steel belt 60 is connected to the connecting part 71, the rotating part 72 is rotationally connected to the base, and the rocker arm 70 is provided with a connecting part 80 for connecting to the driven part 110.

[0027] In this embodiment, when the drive motor 30 is working, the output shaft can drive the driving wheel 40 to rotate, and the driving wheel 40 drives the driven wheel 50 to rotate. The driven wheel 50 spreads or rolls up the steel belt 60, thereby realizing the extension and retraction of the steel belt 60. The connecting portion 71 of the rocker arm 70 is connected to the steel belt 60, and the rotating portion 72 of the rocker arm 70 is rotatably connected to the base. The steel belt 60 is extended and retracted, thereby driving the connecting portion 71 to descend or rise, thereby causing the rotating portion 72 of the rocker arm 70 to rotate relative to the base, that is, the entire rocker arm 70 is rotated relative to the base. The parts outside the moving point all move in the length direction of the steel belt 60, that is, they move upward in the lifting direction of the driven member 110; the part of the rocker arm 70 located on the side of the rotating part 72 close to the connecting part 71 descends as the steel belt 60 extends and rises as the steel belt 60 contracts, while the part of the rocker arm 70 located on the side of the rotating part 72 away from the connecting part 71 rises as the steel belt 60 extends and descends as the steel belt 60 contracts; thus, the connecting member 80 provided on the rocker arm 70 can be raised and lowered, thereby driving the driven member 110 connected to the connecting member 80 to rise and fall. The steel belt 60 is extended and retracted by rolling up or unrolling it, thereby reducing the size in the lifting direction and the space occupied in the lifting direction, making the lifting drive device compact, space-saving, and highly integrated; the rocker arm 70 structure is used to achieve lifting drive, which is suitable for small-scale lifting and precise control.

[0028] like Figure 2As shown, based on the above embodiment, the connecting member 80 is further rotatably connected to the rocker arm 70, and the outer contour of the connecting member 80 for contacting with the driven member 110 is in an arc shape.

[0029] In this embodiment, the connecting member 80 is rotationally connected to the rocker arm 70, and the outer contour of the connecting member 80 abuts against the driven member 110 (for example, the actuator shaft). When the connecting member 80 moves with the rocker arm 70, the connecting member 80 drives the driven member 110 to rise and fall. Since the connecting member 80 not only moves in the lifting direction, but also rotates around the rotating connection point between the rotating part 72 and the base, there is relative sliding between the connecting member 80 and the driven member 110. The connecting member 80 is rotationally connected to the rocker arm 70, and the outer contour of the connecting member 80 is arranged in an arc shape, which can reduce the resistance between the connecting member 80 and the driven member 110, thereby ensuring that the driven member 110 is driven to move smoothly.

[0030] The connecting member 80 may include a rotating shaft and a roller, the roller is sleeved on the rotating shaft, a mounting cavity is provided on the rocker arm 70 , the rotating shaft is fixed in the mounting cavity, and the roller abuts against the driven member 110 .

[0031] As an optional solution, the connecting member 80 is a bearing, which is easy to install and rotates smoothly.

[0032] Based on the above embodiments, further, the positional relationship between the connecting portion 71, the rotating portion 72 and the connecting member 80 can be set as needed. For example, the connecting member 80 and the connecting portion 71 are respectively located at the two ends of the rocker arm 70, and the rotating portion 72 is located between the connecting portion 71 and the connecting member 80.

[0033] As an alternative, Figure 2 As shown, the connecting portion 71 and the rotating portion 72 are respectively located at two ends of the rocker arm 70 , and the connecting member 80 is located between the connecting portion 71 and the rotating portion 72 , and the connecting member 80 is arranged close to the rotating portion 72 .

[0034] In this embodiment, the connecting member 80 is disposed between the rotating portion 72 and the connecting portion 71. Thus, the connecting member 80 descends as the steel belt 60 extends and ascends as the steel belt 60 contracts, thereby facilitating control of the lifting motion. Furthermore, the drive motor 30 is relatively far from the connecting member 80, and thus also from the driven component 110, which facilitates a more rational distribution layout.

[0035] like Figure 1 and Figure 2As shown, based on any of the above embodiments, the base further includes a rocker arm bracket 10 and a motor bracket 20 that are connected to each other; the rocker arm bracket 10 and the motor bracket 20 are respectively provided with through holes, the rotating part 72 is rotatably connected to the rocker arm bracket 10, the driving motor 30 is connected to the motor bracket 20, the driven wheel 50 is rotatably connected to the motor bracket 20, the driving wheel 40 and the steel belt 60 are both in the motor bracket 20, and the connecting part 71 extends into the motor bracket 20 through the through hole to be connected to the steel belt 60.

[0036] In this embodiment, the base includes a rocker arm bracket 10 and a motor bracket 20. The rocker arm bracket 10 and the motor bracket 20 can be set with corresponding structures according to the specific installation environment, which is also beneficial to reducing the weight of the base, thereby facilitating the lightweighting of the lifting drive device.

[0037] Specifically, the motor bracket 20 is set in a U shape, the fixing part of the drive motor 30 is fixed on the outside of the motor bracket 20, the output shaft of the drive motor 30 passes through the first side wall of the motor bracket 20 and is rotatably connected to the second side wall opposite to the first side wall, the driven wheel 50 can be rotatably connected to the first side wall and the second side wall through the rotating shaft, the driven wheel 50 is set parallel to the axial direction and the axial direction of the output shaft of the drive motor 30, and the driving wheel 40 is coaxially fixed with the output shaft of the drive motor 30. Such a structure is compact and reduces space occupation.

[0038] The rocker arm bracket 10 and the motor bracket 20 can be connected by integral molding, welding, clamping or threaded connection.

[0039] like Figure 1 and Figure 2 As shown, based on the above embodiment, further, in the length direction of the steel belt 60, a connecting groove 11 is provided on one side of the rocker arm bracket 10, and a mounting groove 12 is provided on the other side of the rocker arm bracket 10, and the rocker arm 70 is rotatably connected in the mounting groove 12.

[0040] In this embodiment, the connection groove 11 can be used to connect to the driven member 110. The connection groove 11 can restrain the driven member 110 and further reduce the weight of the base, thereby further reducing the weight of the lifting drive device. The mounting groove 12 can also further reduce the weight of the base, thereby further reducing the weight of the lifting drive device.

[0041] like Figure 2 As shown, based on the above embodiment, further, a strip groove 13 is provided on the bottom plate of the connecting groove 11, a connecting port is provided on the bottom plate of the strip groove 13, and a portion of the connecting member 80 extends out of the connecting port; a through hole is also provided on the bottom plate of the connecting groove 11, and a portion of the rotating part 72 extends out of the through hole.

[0042] In order to avoid interference between the rotating portion 72 and the driven member 110, the top of the connecting portion 71 (the side away from the installation cavity) can be set to a polygonal or arc shape. A flow channel for medium circulation can be set on the side wall of the strip groove.

[0043] like Figure 2 As shown, based on the above embodiment, the connecting member 80 is further located between the connecting portion 71 and the rotating portion 72, and the connecting member 80 is arranged close to the rotating portion 72. The lifting drive device also includes a lower limit member provided on the base, the lower limit member is located in the descending direction of the connecting portion 71, and the lower limit member can contact the connecting portion 71 to prevent the connecting portion 71 from continuing to descend.

[0044] In this embodiment, during the descent of the connecting member 80, after the connecting member 80 descends a certain distance, the lower limit member can abut against the connecting portion 71, thereby preventing the rocker arm 70 from continuing to rotate, preventing the connecting member 80 from continuing to descend, and avoiding the connecting member 80 from descending excessively.

[0045] As an alternative, Figure 2 As shown, the lower limiting member includes a limiting nail 120, which is fixed on the side wall of the rocker arm bracket 10 close to the motor bracket.

[0046] As an alternative, Figure 3 As shown, the base further includes a sealing cover 90 , which is detachably connected to the opening of the mounting groove 12 , and the lower limiting member includes a limiting block 130 provided on the sealing cover.

[0047] It should be noted that only the limiting pin 120 or only the limiting block 130 may be provided, or both the limiting pin 120 and the limiting block 130 may be provided.

[0048] Based on the above embodiment, the connecting member 80 is located between the connecting portion 71 and the rotating portion 72, and is positioned near the rotating portion 72. The connecting portion 71 extends through the through hole into the motor bracket 20 to connect with the steel belt 60. In other words, the connection between the connecting portion 71 and the steel belt 60 is located within the motor bracket 20. An upper limit member can be provided on the motor bracket. The upper limit member is located in the direction of the upward movement of the connecting portion 71 and can contact the connecting portion 71 to prevent the connecting portion 71 from rising further.

[0049] In this embodiment, during the raising process of the connecting member 80, when the connecting member 80 is raised a certain distance, the upper limit member can abut against the connecting portion 71, thereby preventing the rocker arm 70 from continuing to rotate, preventing the connecting member 80 from continuing to rise, and avoiding the connecting member 80 from rising too far.

[0050] Among them, a protrusion can be provided on the motor bracket 20, which can contact the connecting portion 71 to prevent the connecting portion 71 from continuing to rise. Optionally, the upper edge of the through hole of the motor bracket 20 forms an upper limit member, which has a simple structure, avoids setting too many parts, and simplifies assembly.

[0051] On the base support of the above embodiment, a gear transmission can be provided between the driving wheel 40 and the driven wheel 50. Optionally, the lifting drive device further includes a synchronous belt 100. The driving wheel 40 is coaxially fixed to the output shaft of the drive motor 30, and the synchronous belt 100 is connected between the driving wheel 40 and the driven wheel 50, thereby simplifying the transmission structure.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description. In addition, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments.

Claims

1. A lifting drive device, characterized in that: include: A base, a drive motor, a driving wheel, a driven wheel, a steel belt and a rocker arm, wherein the rocker arm includes a connecting portion and a rotating portion; the drive motor is connected to the base, the output shaft of the drive motor is transmission-connected to the driving wheel, the driving wheel is transmission-connected to the driven wheel, one end of the steel belt is connected to the driven wheel, the other end of the steel belt is connected to the connecting portion, the rotating portion is rotationally connected to the base, and the rocker arm is provided with a connecting member for connecting to a driven member; The connecting member is a bearing; the connecting member is rotatably connected to the rocker arm, and the outer contour of the connecting member abuts against the driven member; The base includes a rocker arm bracket and a motor bracket that are connected to each other; the rocker arm bracket and the motor bracket are respectively provided with through holes, the rotating portion is rotatably connected to the rocker arm bracket, the driving motor is connected to the motor bracket, the driven wheel is rotatably connected to the motor bracket, the driving wheel and the steel belt are both located in the motor bracket, the connecting portion passes through the through hole and extends into the motor bracket to be connected to the steel belt; in the length direction of the steel belt, one side of the rocker arm bracket is provided with a connecting groove, and the other side of the rocker arm bracket is provided with a mounting groove, the rocker arm is rotatably connected in the mounting groove, and the connecting groove is used to be connected to the driven member; It also includes: a lower limit member arranged on the base, the lower limit member is located in the descending direction of the connecting part, and the lower limit member can contact the connecting part to prevent the connecting part from continuing to descend; and an upper limit member arranged on the motor bracket, the upper limit member is located in the ascending direction of the connecting part, and the upper limit member can contact the connecting part to prevent the connecting part from continuing to rise.

2. The lifting drive device according to claim 1, characterized in that: The connecting portion and the rotating portion are respectively located at two ends of the rocker arm, the connecting member is located between the connecting portion and the rotating portion, and the connecting member is arranged close to the rotating portion.

3. The lifting drive device according to claim 1, characterized in that: The lower limiting member includes a limiting nail, and the limiting nail is fixed on the side wall of the rocker arm bracket close to the motor bracket.

4. The lifting drive device according to claim 1, characterized in that: The base further includes a sealing cover, which is detachably connected to the opening of the mounting groove, and the lower limiting member includes a limiting block arranged on the sealing cover.

5. The lifting drive device according to claim 1, characterized in that: The lifting drive device further includes a synchronous belt, the driving wheel is coaxially fixed with the output shaft of the driving motor, and the synchronous belt is connected between the driving wheel and the driven wheel.

Images