Transmission mechanism and single-power-source driving device

Abstract

The utility model belongs to the technical field of transmission, and discloses a transmission mechanism and a single power source driving device.The transmission mechanism comprises a transmission assembly, at least two lead screws and a power output piece, the transmission assembly is provided with a power input end and at least two power output ends, the power input end is used for being matched with a power source, and the power output end is used for being matched with the power source. Each lead screw is connected with one power output end and can be driven by the power output end to rotate, the power output piece is provided with at least two transmission parts, each transmission part is matched with one lead screw, and the power output piece can be driven by the lead screws to do linear motion. According to the transmission mechanism, the transmission mode that single input and multiple transmission outputs are gathered into single linear motion output is adopted, so that the reliability of the transmission mechanism is improved, and the motion stability of the transmission mechanism is ensured.

Description

Technical Field

[0001] The utility model relates to the field of drive technology, in particular to a transmission mechanism and a single power source drive device. Background Art

[0002] Common screw transmission mechanisms mostly use a single motor to control a single transmission output. Specifically, the motor directly drives the screw to rotate, so that the nut on the screw moves along the axial direction of the screw, thereby achieving linear motion output. However, the reliability of this transmission structure is relatively poor, and the motion stability is often affected by external factors. Especially when the surface area of ​​the external parts is large, the output linear motion stability is very poor, thus affecting the normal operation of related equipment. Utility Model Content

[0003] The first object of the utility model is to provide a transmission mechanism with high reliability and good stability.

[0004] The second purpose of the utility model is to provide a single-power source driving device, which has good reliability and can achieve a relatively stable linear driving function.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a transmission mechanism, comprising: a transmission component, the transmission component has a power input end and at least two power output ends, the power input end is used to cooperate with a power source; at least two lead screws, each of the lead screws is connected to one of the power output ends and can rotate under the drive of the power output end; a power output member, the power output member has at least two transmission parts, each of the transmission parts cooperates with one of the lead screws, and the power output member can perform linear motion under the drive of the lead screw.

[0007] The transmission mechanism of the utility model has the following beneficial effects: in the actual working process, the power source inputs power from the power input end to the transmission assembly, and then outputs it from multiple power output ends. Since each power output end is equipped with a lead screw, when the power source is started, multiple lead screws can rotate simultaneously, and since the power output member has multiple transmission parts, each transmission part is equipped with a lead screw, during the rotation of multiple lead screws, multiple transmission parts can be driven to move along the axial direction of the lead screw, thereby realizing the linear motion of the power output member. The transmission mechanism of this embodiment improves the reliability of the transmission mechanism and ensures the smoothness of the movement of the transmission mechanism through a transmission mode in which a single input and multiple transmission outputs are combined into a single linear motion output.

[0008] In some embodiments, the transmission mechanism further includes an anti-backlash component disposed on the lead screw, wherein the anti-backlash component cooperates with the lead screw and is used to eliminate the thread gap between the lead screw and the power output member.

[0009] In some specific embodiments, the anti-backlash assembly includes: a first nut, the first nut cooperates with the lead screw thread, and one end of the first nut stops at the power output member; a second nut, the second nut cooperates with the lead screw thread, and one end of the second nut is connected to the first nut; an elastic member, the elastic member is sleeved between the first nut and the second nut, one end of the elastic member stops at the power output member, and the other end stops at the second nut.

[0010] In some more specific embodiments, one of the first nut and the second nut is provided with an inserting protrusion, and the other is provided with an inserting groove, and the inserting protrusion can be matched with the inserting groove.

[0011] In some embodiments, the transmission mechanism includes a bottom shell and a top shell, the bottom shell and the top shell define an installation cavity, the transmission assembly is installed in the installation cavity, the two ends of the screw are rotatably matched with the bottom shell and the top shell respectively, and the power output part also includes a power output part connected to the transmission part, and the power output part extends out of the top shell.

[0012] In some specific embodiments, the plurality of transmission parts are distributed at intervals along the circumference of the power output part.

[0013] In some specific embodiments, the transmission assembly includes: a main gear, which is arranged in the installation cavity, and the output shaft of the power source passes through the bottom shell and cooperates with the main gear; a transmission gear group, the input gear of the transmission gear group is meshed with the main gear, and the output gear of the transmission gear group is connected to the screw.

[0014] In some specific embodiments, the lead screw includes a threaded section and an optical axis section connected to both ends of the threaded section, the threaded section is threadedly matched with the transmission part, the two optical axis sections are respectively matched with the bottom shell and the top shell, and the output gear sleeve is arranged on the optical axis section matched with the bottom shell.

[0015] In some specific embodiments, the transmission gear set also includes an intermediate gear, which is used to transmit power from the input gear to the output gear through meshing; the transmission assembly includes a support plate, which is arranged between the top shell and the bottom shell, and the two ends of the gear shaft of the intermediate gear are respectively rotatably connected to the bottom shell and the support plate.

[0016] The utility model also discloses a single-power source driving device, including a power source and the transmission mechanism described above, wherein the power input end of the transmission component of the transmission mechanism cooperates with the power source, and the power output member of the transmission mechanism is used to drive an external structure to perform linear motion.

[0017] The beneficial effects of the single-power source drive device of the utility model are as follows: in the actual working process, the power source inputs power from the power input end to the transmission component, and then outputs it from multiple power output ends. Since each power output end is equipped with a lead screw, when the power source is started, multiple lead screws can rotate simultaneously, and since the power output member has multiple transmission parts, each transmission part is equipped with a lead screw, during the rotation of multiple lead screws, multiple transmission parts can be driven to move along the axial direction of the lead screw, thereby realizing the linear motion of the power output member. The single-power source drive device of this embodiment improves the reliability of power output through a transmission mode in which single-input and multiple transmission outputs are combined into a single linear motion output, and can realize a relatively stable linear drive function.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a single power source driving device of an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the exploded structure of a single power source driving device of an embodiment of the utility model;

[0021] Figure 3 It is a sectional view of the practical single-power source driving device.

[0022] Reference numerals:

[0023] 100, transmission assembly; 110, main gear; 120, transmission gear set; 121, input gear; 122, output gear; 123, intermediate gear;

[0024] 200, lead screw; 210, threaded section; 220, optical axis section;

[0025] 300, power output member; 310, transmission unit; 320, power output unit;

[0026] 400, anti-backlash assembly; 410, first nut; 420, second nut; 430, elastic member;

[0027] 500, top shell;

[0028] 600, bottom shell;

[0029] 700, support plate;

[0030] 800. Power source. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] refer to Figure 1 and Figure 2As shown, the transmission mechanism of this embodiment includes a transmission assembly 100, three lead screws 200 and a power output member 300, and the transmission assembly 100 has a power input end and three power output ends, and the power input end is used to cooperate with the power source 800. First of all, it should be noted that in the embodiment of the utility model, the number of the transmission parts 310 of the lead screw 200 and the power output member 300 can be two, or four or more. For the convenience of description and to avoid the problem of occupying too much space, the specific structure of the transmission mechanism is described by taking the lead screw 200 and the power output member 300 as an example of three transmission parts 310. Each lead screw 200 is connected to a power output end and can rotate under the drive of the power output end. The power output member 300 has three transmission parts 310, each transmission part 310 cooperates with a lead screw 200, and the power output member 300 can do linear motion under the drive of the lead screw 200. It is understandable that, in the actual working process, the power source 800 inputs power from the power input end to the transmission assembly 100, and then outputs it from the three power output ends. Since each power output end is equipped with a lead screw 200, when the power source 800 is started, the three lead screws 200 can rotate simultaneously, and since the power output member 300 has three transmission parts 310, each transmission part 310 is equipped with a lead screw 200, the three lead screws 200 can drive the three transmission parts 310 to move along the axial direction of the lead screw 200 during rotation, thereby realizing the linear motion of the power output member 300. The transmission mechanism of this embodiment improves the reliability of the transmission mechanism and ensures the motion stability of the transmission mechanism through a transmission mode in which a single input and multiple transmission outputs are combined into a single linear motion output.

[0036] refer to Figure 2 and Figure 3 As shown, the transmission mechanism also includes an anti-backlash component 400 provided on the lead screw 200, and the anti-backlash component 400 is matched with the lead screw 200 and is used to eliminate the thread gap between the lead screw 200 and the power output member 300. It can be understood that due to the processing technology of the lead screw 200 and the threaded hole matched therewith, there is a certain thread gap after the lead screw 200 and the transmission part 310 of the power output member 300 are matched, so that the lead screw 200 and the transmission part 310 are easy to shake in the axial direction, thereby affecting the accuracy of the axial displacement of the transmission part 310. The anti-backlash component 400 added in this embodiment can eliminate the thread gap between the lead screw 200 and the power output member 300, avoid the shaking between the lead screw 200 and the transmission part 310 in the axial direction, thereby ensuring the accuracy of the axial displacement of the transmission part 310 along the lead screw 200.

[0037] Further, refer to Figure 3As shown, the backlash elimination assembly 400 includes a first nut 410, a second nut 420 and an elastic member 430, wherein the first nut 410 is threadedly matched with the lead screw 200, and one end of the first nut 410 is stopped at the power output member 300, the second nut 420 is threadedly matched with the lead screw 200, and one end of the second nut 420 is connected to the first nut 410, and the elastic member 430 is sleeved between the first nut 410 and the second nut 420, and one end of the elastic member 430 is stopped at the power output member 300, and the other end is stopped at the second nut 420. It can be understood that the additional second nut 420 can compress the elastic member 430 to apply pressure along the axial direction of the lead screw 200 to the transmission part 310 of the power output member 300, so that the transmission part 310 is fully meshed with the thread tooth profile of the lead screw 200, thereby eliminating the thread gap between the lead screw 200 and the power output member 300. The additional first nut 410 can prevent the elastic member 430 from bending, thereby ensuring that the elastic member 430 can stably apply pressure along the axial direction of the lead screw 200 to the transmission part 310 of the power output member 300, thereby improving the clearance elimination effect. Optionally, the elastic member 430 is a spring.

[0038] Optionally, the first nut 410 is provided with a plug-in protrusion, and the second nut 420 is provided with a plug-in groove, and the plug-in protrusion can cooperate with the plug-in groove. In an alternative embodiment, the first nut 410 is provided with a plug-in groove, and the second nut 420 is provided with a plug-in protrusion. It should be supplemented that in the embodiment of the utility model, the number and specific shape of the plug-in protrusion and the plug-in groove can be adjusted according to actual needs, and the plug-in protrusion and the plug-in groove can ensure that the first nut 410 and the second nut 420 can move along their axial direction to achieve the function of eliminating backlash.

[0039] It should be supplemented that, in other embodiments of the present invention, the structure of the anti-backlash component 400 can also select the anti-backlash structure for the screw-nut transmission pair in the prior art according to actual needs, and is not limited to the above description.

[0040] refer to Figure 2 and Figure 3As shown, the transmission mechanism further includes a bottom shell 600 and a top shell 500, and a mounting cavity is defined in the bottom shell 600 and the top shell 500, and the transmission assembly 100 is installed in the mounting cavity, and the two ends of the lead screw 200 are rotatably matched with the bottom shell 600 and the top shell 500, respectively, and the power output member 300 further includes a power output part 320 connected to the transmission part 310, and the power output part 320 extends out of the top shell 500. It can be understood that installing the transmission assembly 100 and the lead screw 200 in the mounting cavity formed by the bottom shell 600 and the top shell 500 is conducive to modular processing, convenient for product handling, transportation and sales, and can protect the lead screw 200 and the transmission assembly 100 and reduce the probability of damage to the lead screw 200 and the transmission assembly 100.

[0041] Optionally, the bottom shell 600 and the top shell 500 are detachably connected by a connection structure such as a buckle or a screw, thereby facilitating maintenance of the transmission mechanism.

[0042] Optionally, the transmission part 310 and the power output part 320 are integrally formed, thereby simplifying the structure of the power output part 300 .

[0043] refer to Figure 2 As shown, the transmission assembly 100 includes a main gear 110 and a transmission gear set 120, the main gear 110 is arranged in the installation cavity, the output shaft of the power source 800 passes through the bottom shell 600 and cooperates with the main gear 110, the input gear 121 of the transmission gear set 120 is meshed with the main gear 110, and the output gear 122 of the transmission gear set 120 is connected to the lead screw 200. It can be understood that the main gear 110 and the transmission gear set 120 are used to realize power transmission, which can realize the function of deceleration and force increase, thereby ensuring that the lead screw 200 can rotate stably.

[0044] Further, refer to Figure 2 As shown, the transmission gear set 120 also includes an intermediate gear 123, which is used to transmit power from the input gear 121 to the intermediate gear 123; the transmission assembly 100 includes a support plate 700, which is arranged between the top shell 500 and the bottom shell 600, and the two ends of the gear shaft of the intermediate gear 123 are rotatably connected to the bottom shell 600 and the support plate 700 respectively. It can be understood that the introduction of the intermediate gear 123 can further enhance the effect of deceleration and force increase, thereby ensuring that the lead screw 200 can rotate stably. The additional support plate 700 can ensure that the intermediate gear 123 can rotate stably, thereby ensuring that the power can be transmitted stably.

[0045] Optionally, the intermediate gear 123 is coaxially arranged with the input gear 121. Thus, the space occupied by the transmission gear set 120 can be reduced, thereby facilitating the miniaturization design of the transmission mechanism. Of course, in an alternative embodiment of this invention, the intermediate gear 123 meshes with the input gear 121, and the intermediate gear 123 meshes with the output gear 122.

[0046] It should be additionally explained that, when the transmission gear set 120 includes only one transmission gear, the input gear 121 and the output gear 122 form one gear, that is, the transmission gear is meshed with the main gear 110 and connected to the lead screw 200 .

[0047] Of course, it should be supplemented here that in other embodiments of the present invention, the structure of the transmission gear set 120 can be adjusted according to actual needs. In other embodiments of the present invention, the transmission assembly 100 can also be a plurality of belt transmission structures. Specifically, the driving pulleys of the plurality of belt transmission structures are all matched with the power source 800, and the driven pulleys of each belt transmission structure are matched with the lead screw 200, thereby also realizing a structure of multiple power output ends. That is to say, in the present invention, the transmission assembly 100 can also be adjusted according to actual needs and is not limited to the above limitations.

[0048] refer to Figure 2 As shown, the lead screw 200 includes a threaded section 210 and an optical axis section 220 connected to both ends of the threaded section 210, the threaded section 210 is threadedly matched with the transmission part 310, the two optical axis sections 220 are respectively matched with the bottom shell 600 and the top shell 500, and the output gear 122 of the transmission gear set 120 is sleeved on the optical axis section 220 matched with the bottom shell 600. It can be understood that directly installing the output gear 122 on the optical axis section 220 of the lead screw 200 saves parts and facilitates assembly on the one hand, and is conducive to reducing the volume of the entire transmission mechanism and facilitating the miniaturization design of the transmission mechanism on the other hand.

[0049] Optionally, bearings are provided on the optical axis section 220. It is understandable that the additional bearings can reduce the friction between the optical axis section 220 and the top shell 500 and the bottom shell 600, thereby ensuring that the entire lead screw 200 can rotate stably, reducing the wear of the lead screw 200 and extending the service life of the lead screw 200.

[0050] Optionally, the three transmission parts 310 are distributed at intervals along the circumference of the power output part 320. Thus, it is possible to ensure that the power output part 320 moves smoothly.

[0051] The utility model also discloses a single power source drive device, including a power source 800 and the transmission mechanism described above, the power input end of the transmission assembly 100 of the transmission mechanism cooperates with the power source 800, and the power output member 300 of the transmission mechanism is used to drive the external structure to perform linear motion. It can be understood that in the actual working process, the power source 800 inputs power from the power input end to the transmission assembly 100, and then outputs it from multiple power output ends. Since each power output end is matched with a lead screw 200, when the power source 800 is started, multiple lead screws 200 can rotate at the same time, and since the power output member 300 has multiple transmission parts 310, each transmission part 310 is matched with a lead screw 200, during the rotation of multiple lead screws 200, multiple transmission parts 310 can be driven to move along the axial direction of the lead screw 200, thereby realizing the linear motion of the power output member 300. The single power source drive device of this embodiment improves the reliability of power output through a transmission mode in which single input and multiple transmission outputs are combined into a single linear motion output, and can realize a relatively stable linear drive function.

[0052] Optionally, the power source 800 may be a motor, a rotary cylinder, or other rotatable driving source.

[0053] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A transmission mechanism, characterized in that: include: A transmission assembly (100), the transmission assembly (100) having a power input end and at least two power output ends, the power input end being used to cooperate with a power source (800); At least two lead screws (200), each of the lead screws (200) being connected to one of the power output ends and being capable of rotating under the drive of the power output end; A power output member (300) having at least two transmission parts (310), each of the transmission parts (310) being matched with a lead screw (200), and the power output member (300) being capable of performing linear motion under the drive of the lead screw (200).

2. The transmission mechanism according to claim 1, characterized in that: The transmission mechanism further comprises a backlash elimination component (400) arranged on the lead screw (200), the backlash elimination component (400) being matched with the lead screw (200) and being used to eliminate the thread gap between the lead screw (200) and the power output member (300).

3. The transmission mechanism according to claim 2, characterized in that: The anti-backlash assembly (400) comprises: a first nut (410), wherein the first nut (410) is threadably matched with the lead screw (200), and one end of the first nut (410) abuts against the power output member (300); a second nut (420), wherein the second nut (420) is threadably matched with the lead screw (200), and one end of the second nut (420) is connected to the first nut (410); An elastic member (430), wherein the elastic member (430) is sleeved between the first nut (410) and the second nut (420), and one end of the elastic member (430) abuts against the power output member (300), and the other end abuts against the second nut (420).

4. The transmission mechanism according to claim 3, characterized in that: One of the first nut (410) and the second nut (420) is provided with an inserting protrusion, and the other is provided with an inserting groove, and the inserting protrusion can be matched with the inserting groove.

5. The transmission mechanism according to any one of claims 1 to 4, characterized in that: The transmission mechanism further comprises a bottom shell (600) and a top shell (500), wherein the bottom shell (600) and the top shell (500) define an installation cavity, wherein the transmission assembly (100) is installed in the installation cavity, wherein two ends of the lead screw (200) are rotatably matched with the bottom shell (600) and the top shell (500), respectively, and the power output member (300) further comprises a power output portion (320) connected to the transmission portion (310), wherein the power output portion (320) extends out of the top shell (500).

6. The transmission mechanism according to claim 5, characterized in that: The plurality of transmission parts (310) are distributed at intervals along the circumference of the power output part (320).

7. The transmission mechanism according to claim 5, characterized in that: The transmission assembly (100) comprises: A main gear (110), the main gear (110) being arranged in the installation cavity, and the output shaft of the power source (800) passing through the bottom shell (600) and cooperating with the main gear (110); A transmission gear set (120), wherein an input gear (121) of the transmission gear set (120) is meshed with the main gear (110), and an output gear (122) of the transmission gear set (120) is connected to the lead screw (200).

8. The transmission mechanism according to claim 7, characterized in that: The lead screw (200) comprises a threaded section (210) and an optical axis section (220) connected to both ends of the threaded section (210); the threaded section (210) is threadedly matched with the transmission part (310); the two optical axis sections (220) are respectively matched with the bottom shell (600) and the top shell (500); and the output gear (122) is sleeved on the optical axis section (220) matched with the bottom shell (600).

9. The transmission mechanism according to claim 7, characterized in that: The transmission gear set (120) further comprises an intermediate gear (123), and the intermediate gear (123) is used to transmit power from the input gear (121) to the output gear (122); the transmission assembly (100) comprises a support plate (700), and the support plate (700) is arranged between the top shell (500) and the bottom shell (600), and the two ends of the gear shaft of the intermediate gear (123) are rotatably connected to the bottom shell (600) and the support plate (700), respectively.

10. A single power source driving device, characterized in that: It comprises a power source (800) and a transmission mechanism as described in any one of claims 1 to 9, wherein a power input end of a transmission assembly (100) of the transmission mechanism cooperates with the power source (800), and a power output member (300) of the transmission mechanism is used to drive an external structure to perform linear motion.

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