A power source transmission structure

Abstract

The present invention discloses a power source transmission structure, which includes a power source, a transmission housing and a screw assembly; the transmission housing includes a front end cover, a middle housing and a rear end housing, and an adjustment cover is threadedly connected in the front end cover; a front end screw nut sleeve is fixed at one end of the screw nut, and the front end screw nut sleeve is rotatably connected in the front end cover through a first bearing on a first connecting section, and the first bearing is axially limited by the adjustment cover and the first limiting section; the other end of the screw nut is rotatably connected in the rear end housing; the threaded section of the transmission screw is connected in the screw nut; the power source is connected to the screw nut, and the screw nut rotates under the drive of the power source, driving the transmission screw to move in a straight line. In the embodiment of the present invention, the power source transmission structure has the advantages of compact overall structure and tight transmission structure, and the matching clearance of the transmission structure can be adjusted to ensure the stable operation of the transmission structure and meet different transmission needs.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation equipment, and in particular to a power source transmission structure. Background Art

[0002] With the increase in the number of patients with lower limb movement disorders caused by the aging population and various diseases, rehabilitation robot technology that combines rehabilitation medicine with robotics is gradually becoming a hot research topic at home and abroad. Currently, there are not many types of medical rehabilitation robots put into clinical use, and they are not mature in terms of mechanism design, modular design and computer control.

[0003] The gait training rehabilitation robot is a device specially designed to restore walking function for patients with walking disorders in the lower limbs. The biofeedback of the system can track the patient's steps in real time during the lower limb training process and display it in the form of data and graphics; based on the biofeedback data, the computer can make automatic adjustments to correct the patient's abnormal gait, and the gait training rehabilitation robot can automatically switch between active training and passive training according to the patient's walking ability.

[0004] In the existing gait training rehabilitation robots, mechanical legs or mechanical arms are required to assist patients in gait training rehabilitation. The linear drive elements in the mechanical legs or mechanical arms are generally driven by a power source transmission structure. The power source transmission structure converts the rotational motion of the power source into linear motion to drive the linear motion of the linear drive elements.

[0005] The existing power source transmission structure has problems of loose structure and loose transmission structure, which leads to a large volume of the power source transmission structure and inconvenient installation and connection with the robot leg or robot arm; in addition, after the power source transmission structure has been running for a long time, the transmission structure will have a matching gap, which will affect the transmission efficiency of the transmission structure, resulting in reduced rigidity, reduced torque, and easy vibration of the transmission structure. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a power source transmission structure, which has the advantages of compact structure, tight transmission structure, small size, and convenient installation and connection. The matching clearance of the transmission structure can be adjusted to ensure the stable operation of the transmission structure.

[0007] Accordingly, an embodiment of the present invention provides a power source transmission structure, the power source transmission structure includes a power source transmission structure, the power source transmission structure includes a power source, a transmission housing and a screw assembly;

[0008] The transmission housing comprises a front end cover, a middle housing and a rear end housing, and an adjusting cover is threadedly connected in the front end cover;

[0009] The screw assembly comprises a screw nut and a transmission screw;

[0010] A front end screw nut sleeve is fixed to one end of the screw nut, and the front end screw nut sleeve includes a first limiting section and a first connecting section. The front end screw nut sleeve is rotatably connected to the front end cover through a first bearing on the first connecting section, and the first bearing is axially limited by the adjusting cover and the first limiting section; the other end of the screw nut is rotatably connected to the rear end housing;

[0011] The threaded section of the transmission screw is connected in cooperation with the screw nut, and the connecting section of the transmission screw passes through the adjustment cover and extends outward;

[0012] The power source is connected to the screw nut, and the screw nut rotates under the drive of the power source, driving the transmission screw to move in a straight line.

[0013] In an optional embodiment, a plurality of first axial top screw holes are provided on the end surface of the front end screw nut sleeve, and a first top screw which cooperates with the first axial top screw hole and presses the screw nut is provided in the first axial top screw hole.

[0014] In an optional implementation manner, the first bearing inner ring of the first bearing is connected to the first connecting section, and the first bearing inner ring is axially limited by the first limiting section;

[0015] The first bearing outer ring of the first bearing is matched with the inner wall of the front end cover, and the first bearing outer ring is axially limited by the adjusting cover.

[0016] In an optional embodiment, a rear end screw nut sleeve is fixed to the other end of the screw nut, and the rear end screw nut sleeve includes a second limiting section and a second connecting section. The rear end screw nut sleeve is rotatably connected to the rear end housing via a second bearing on the second connecting section, and the second bearing is axially limited by the rear end housing and the second limiting section.

[0017] In an optional embodiment, a plurality of second axial top screw holes are provided on the end surface of the rear end screw nut sleeve, and a second top screw which cooperates with the second axial top screw hole and presses the screw nut is provided in the second axial top screw hole.

[0018] In an optional implementation manner, the second bearing inner ring of the second bearing is connected to the second connecting section, and the second bearing inner ring is axially limited by the second limiting section;

[0019] The second bearing outer ring of the second bearing is matched with the inner wall of the rear end housing, and the second bearing outer ring is axially limited by the inner wall of the rear end housing.

[0020] In an optional embodiment, the front end cover is fixed to the front side of the lower end of the middle shell, the rear end shell is fixed to the rear side of the lower end of the middle shell, the power source is fixed to the rear side of the upper end of the middle shell, and the output end of the power source extends into the middle shell;

[0021] The output end of the power source is keyed to a first synchronous gear, the screw nut is keyed to a second synchronous gear, the first synchronous gear and the second synchronous gear are positioned correspondingly and are connected via a synchronous belt.

[0022] In an optional embodiment, the rear end housing includes a housing connection seat and a housing tube portion which are coaxially arranged;

[0023] The shell connecting seat is fixed to the rear side of the lower end of the middle shell;

[0024] The shell tube portion extends in a direction away from the shell connecting seat, and an axial through hole of the tube portion adapted to the transmission screw is provided in the shell tube portion, and a fixing piece is threadedly connected to one end of the shell tube portion away from the shell connecting seat.

[0025] In an optional implementation manner, an axial through hole of the adjusting cover adapted to the transmission screw is provided in the adjusting cover, and a connecting section of the transmission screw extends outward through the axial through hole of the adjusting cover.

[0026] In an optional implementation manner, a connecting piece is threadedly connected to the connecting section of the transmission screw.

[0027] An embodiment of the present invention provides a power source transmission structure, which can efficiently convert the rotational motion of the power source into the linear motion of the transmission screw, and can well drive the linear motion of the linear drive element; moreover, the power source transmission structure has the advantages of compact overall structure and tight transmission structure, which effectively reduces the volume of the power source transmission structure and facilitates the installation and connection of the power source transmission structure; in addition, the fitting clearance of the screw nut can be adjusted according to needs through the adjustment cover, which effectively ensures the stable transmission of the power source transmission structure while meeting different transmission needs, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a three-dimensional structural schematic diagram of a power source transmission structure in an embodiment of the present invention;

[0030] Figure 2 is a first three-dimensional structural exploded diagram of the power source transmission structure in an embodiment of the present invention;

[0031] Figure 3 It is a second three-dimensional structural explosion diagram of the power source transmission structure in the embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Figure 1 is a three-dimensional structural schematic diagram of the power source transmission structure in an embodiment of the present invention, Figure 2 is a first three-dimensional structural explosion diagram of the power source transmission structure in an embodiment of the present invention, Figure 3 It is a second three-dimensional structural explosion diagram of the power source transmission structure in the embodiment of the present invention.

[0034] An embodiment of the present invention provides a power source transmission structure, which includes a power source 1, a transmission housing 2 and a screw assembly.

[0035] Specifically, the transmission housing 2 includes a front end cover 21, a middle shell 22 and a rear end shell 23. The front end cover 21 is fixed to the front side of the lower end of the middle shell 22, the rear end shell 23 is fixed to the rear side of the lower end of the middle shell 22, and an adjustment cover 24 is threadedly connected in the front end cover 21.

[0036] Among them, a front connecting hole 221 adapted to the front end cover 21 is provided on the front side of the lower end of the middle shell 22, and the front end cover 21 is embedded in the front connecting hole 221 to achieve the preliminary connection between the front end cover 21 and the middle shell 22.

[0037] Among them, the rear end shell 23 includes a coaxially arranged shell connecting seat 231 and a shell tube portion 232, and the rear side of the lower end of the middle shell 22 is provided with a rear side connecting hole 222 adapted to the shell connecting seat 231, and the shell connecting seat 231 is embedded in the rear side connecting hole 222 to achieve the preliminary connection between the rear end shell 23 and the middle shell 22.

[0038] In the embodiment of the present invention, the front end cover 21 is provided with a plurality of axial threaded connection holes 211 on one side facing the middle shell 22, the middle shell 22 is provided with a plurality of middle shell connection holes 223, and the shell connection seat 231 is provided with a plurality of connection seat connection holes 2311; after the front end cover 21 and the rear end shell 23 are respectively preliminarily connected with the middle shell 22, the axial threaded connection holes 211, the middle shell connection holes 223 and the connection seat connection holes 2311 correspond to each other one by one and are on the same axis. Online, by bolts passing through the connecting seat connecting hole 2311, the middle shell connecting hole 223 and then cooperating with the axial threaded connecting hole 211, the front end cover 21, the middle shell 22 and the rear end shell 23 can be fastened together. This connection method facilitates the installation connection between the front end cover 21, the middle shell 22 and the rear end shell 23, and can ensure the tight connection between the front end cover 21, the middle shell 22 and the rear end shell 23, making the structure of the transmission housing 2 more compact.

[0039] Specifically, the screw assembly includes a screw nut 31 and a transmission screw 32. The screw nut 31 is rotatably connected in the middle housing 22. The power source 1 is connected to the screw nut 31. The screw nut 31 rotates under the drive of the power source 1. The threaded segment 321 of the transmission screw 32 is cooperatively connected in the screw nut 31. The rotation of the screw nut 31 drives the linear motion of the transmission screw 32, thereby converting the rotational motion of the power source 1 into the linear motion of the transmission screw 32.

[0040] The connecting section 322 of the transmission screw 32 extends outward through the adjusting cover 24. In the embodiment of the present invention, the adjusting cover 24 is provided with an adjusting cover axial through hole 241 that is compatible with the transmission screw 32. The connecting section 322 of the transmission screw 32 extends outward through the adjusting cover axial through hole 241. In addition, a connecting piece 3221 is threadedly connected to the connecting section 322. The connecting section 322 is connected to a linear driving element in a mechanical leg or a mechanical arm based on the connecting piece 3221, and the linear motion of the linear driving element in the mechanical leg or the mechanical arm is driven by the connecting piece 3221.

[0041] The power source 1 and the screw nut 31 can be connected in various ways, as long as they can play the role of driving the screw nut 31 to rotate. In the embodiment of the present invention, the power source 1 is fixed to the rear side of the upper end of the middle shell 22, the output end of the power source 1 extends into the middle shell 22, and the output end of the power source 1 is keyed with a first synchronous gear 11, and the screw nut 31 is keyed with a second synchronous gear 313. The first synchronous gear 11 and the second synchronous gear 313 are corresponding in position and are connected by a synchronous belt 314. The power source 1 drives the rotation of the screw nut 31 in this way; it should be noted that the transmission method of synchronous wheels and synchronous belts has the advantages of convenient and quick installation and adjustment and compact connection, can effectively reduce the structural volume of the middle shell 22, facilitate the installation and connection of the power source transmission structure, and has high-precision transmission torque, and will not cause problems such as loose connection, transmission accuracy and transmission clearance during the transmission process.

[0042] Among them, a front end screw nut sleeve 311 is fixed to one end of the screw nut 31, and the front end screw nut sleeve 311 includes a first limiting section 3111 and a first connecting section 3112. The front end screw nut sleeve 311 is rotatably connected to the front end cover 21 through the first bearing 3113 on the first connecting section 3112. In an embodiment of the present invention, the first bearing inner ring of the first bearing 3113 is connected to the first connecting section 3112, and the first bearing inner ring is axially limited by the first limiting section 3111. The first bearing outer ring of the first bearing 3113 is adapted to the inner wall of the front end cover 21, and the first bearing outer ring is axially limited by the adjusting cover 24, so that the first bearing 3113 is axially limited in this way.

[0043] Among them, a rear end screw nut sleeve 312 is fixed to the other end of the screw nut 31, and the rear end screw nut sleeve 312 includes a second limiting section 3121 and a second connecting section 3122. The rear end screw nut sleeve 312 is rotatably connected to the rear end housing 23 through the second bearing 3123 on the second connecting section 3122. In an embodiment of the present invention, the second bearing inner ring of the second bearing 3123 is connected to the second connecting section 3122, and the second bearing inner ring is axially limited by the second limiting section 3121. The second bearing outer ring of the second bearing 3123 is adapted to the inner wall of the rear end housing 23, and the second bearing outer ring is axially limited by the inner wall of the rear end housing 23, so that the second bearing 3123 is axially limited.

[0044] In an embodiment of the present invention, one end of the screw nut 31 is rotatably connected to the front end cover 21 via the first bearing 3113 on the front end screw nut sleeve 311, and the other end of the screw nut 31 is rotatably connected to the rear end housing 23 via the second bearing 3123 on the rear end screw nut sleeve 312, thereby ensuring the stable rotation of the screw nut 31; in addition, the first bearing 3113 is axially limited by the adjusting cover 24 and the first limiting section 3111, and the second bearing 3123 is axially limited by the rear end housing 23 and the second limiting section 3121, thereby effectively positioning the screw nut 31, avoiding axial displacement of the screw nut 31 during rotation, and ensuring the stable transmission of the power source transmission structure.

[0045] Since the adjusting cover 24 is threadedly connected to the front end cover 21, the fitting clearance of the lead screw nut 31 can be adjusted according to actual needs and through the adjusting cover 24 to meet different transmission needs; in addition, in the embodiment of the present invention, after the power source transmission structure has been running for a long time, the lead screw nut 31 will become loose, that is, the lead screw nut 31 will have a large fitting clearance, and the fitting clearance will affect the transmission efficiency of the transmission structure, resulting in reduced rigidity, reduced torque, and easy vibration of the transmission structure. At this time, the lead screw nut 31 can be re-tightened by tightening the adjusting cover 24, thereby effectively reducing the fitting clearance of the lead screw nut 31 and ensuring the stable transmission of the power source transmission structure.

[0046] In an embodiment of the present invention, a plurality of first axial top screw holes 3114 are arranged on the end face of the front end screw nut sleeve 311, and a first top screw 3115 is arranged in the first axial top screw hole 3114 to cooperate with the first axial top screw hole 3114 and press the screw nut 31. The front end screw nut sleeve 311 is fixed to one end of the screw nut 31 through the first top screw 3115 to achieve a tight connection with the screw nut 31, thereby effectively avoiding loose connection during the rotation of the screw nut 31.

[0047] Similarly, a plurality of second axial top screw holes 3124 are provided on the end face of the rear end screw nut sleeve 312, and a second top screw which cooperates with the second axial top screw hole 3124 and presses the screw nut 31 is provided in the second axial top screw hole 3124. The rear end screw nut sleeve 312 is fixed to the other end of the screw nut 31 through the second top screw to achieve a tight connection with the screw nut 31, thereby effectively avoiding loose connection during the rotation of the screw nut 31.

[0048] In an embodiment of the present invention, the outer shell tube portion 232 extends in a direction away from the outer shell connecting seat 231, and an axial through hole 2321 of the tube portion that is compatible with the transmission screw 32 is provided in the outer shell tube portion 232 to meet the linear movement of the transmission screw 32 in the transmission housing 2; in addition, a fixing part 2322 is threadedly connected to one end of the outer shell tube portion 232 away from the outer shell connecting seat 231, and the fixed connection of the power source transmission structure is realized by the fixing part 2322.

[0049] An embodiment of the present invention provides a power source transmission structure, which can efficiently convert the rotational motion of the power source 1 into the linear motion of the transmission screw 32, and can well drive the linear motion of the linear drive element; moreover, the power source transmission structure has the advantages of compact overall structure and tight transmission structure, which effectively reduces the volume of the power source transmission structure and facilitates the installation and connection of the power source transmission structure; in addition, the fitting clearance of the screw nut 31 can be adjusted as needed through the adjustment cover 24, which effectively ensures the stable transmission of the power source transmission structure while meeting different transmission needs, and has good practicality.

[0050] In addition, the above is a detailed introduction to a power source transmission structure provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in the field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A power source transmission structure, characterized in that: The power source transmission structure comprises a power source, a transmission housing and a screw assembly; The transmission housing comprises a front end cover, a middle housing and a rear end housing, and an adjusting cover is threadedly connected in the front end cover; The screw assembly comprises a screw nut and a transmission screw; A front end screw nut sleeve is fixed to one end of the screw nut, and the front end screw nut sleeve includes a first limiting section and a first connecting section. The front end screw nut sleeve is rotatably connected to the front end cover through a first bearing on the first connecting section, and the first bearing is axially limited by the adjusting cover and the first limiting section; the other end of the screw nut is rotatably connected to the rear end housing; The first bearing inner ring of the first bearing is connected to the first connecting section, and the first bearing inner ring is axially limited by the first limiting section; the first bearing outer ring of the first bearing is matched with the inner wall of the front end cover, and the first bearing outer ring is axially limited by the adjusting cover; The threaded section of the transmission screw is connected in cooperation with the screw nut, and the connecting section of the transmission screw passes through the adjusting cover to extend outward; the adjusting cover is provided with an axial through hole of the adjusting cover adapted to the transmission screw, and the connecting section of the transmission screw passes through the axial through hole of the adjusting cover to extend outward; The power source is connected to the screw nut, and the screw nut rotates under the drive of the power source, driving the transmission screw to move in a straight line.

2. The power source transmission structure according to claim 1, characterized in that: A plurality of first axial top screw holes are arranged on the end surface of the front end screw nut sleeve, and a first top screw which cooperates with the first axial top screw hole and presses the screw nut is arranged in the first axial top screw hole.

3. The power source transmission structure according to claim 1, characterized in that: A rear end screw nut sleeve is fixed to the other end of the screw nut, and the rear end screw nut sleeve includes a second limiting section and a second connecting section. The rear end screw nut sleeve is rotatably connected to the rear end housing via a second bearing on the second connecting section, and the second bearing is axially limited by the rear end housing and the second limiting section.

4. The power source transmission structure according to claim 3, characterized in that: A plurality of second axial top screw holes are arranged on the end surface of the rear end screw nut sleeve, and a second top screw which cooperates with the second axial top screw hole and presses the screw nut is arranged in the second axial top screw hole.

5. The power source transmission structure according to claim 3, characterized in that: The second bearing inner ring of the second bearing is connected to the second connecting section, and the second bearing inner ring is axially limited by the second limiting section; The second bearing outer ring of the second bearing is matched with the inner wall of the rear end housing, and the second bearing outer ring is axially limited by the inner wall of the rear end housing.

6. The power source transmission structure according to claim 1, characterized in that: The front end cover is fixed to the front side of the lower end of the middle shell, the rear end shell is fixed to the rear side of the lower end of the middle shell, the power source is fixed to the rear side of the upper end of the middle shell, and the output end of the power source extends into the middle shell; The output end of the power source is keyed to a first synchronous gear, the screw nut is keyed to a second synchronous gear, the first synchronous gear and the second synchronous gear are positioned correspondingly and are connected via a synchronous belt.

7. The power source transmission structure according to claim 6, characterized in that: The rear end housing comprises a housing connection seat and a housing pipe portion which are coaxially arranged; The shell connecting seat is fixed to the rear side of the lower end of the middle shell; The shell tube portion extends in a direction away from the shell connecting seat, and an axial through hole of the tube portion adapted to the transmission screw is provided in the shell tube portion, and a fixing piece is threadedly connected to one end of the shell tube portion away from the shell connecting seat.

8. The power source transmission structure according to claim 1, characterized in that: A connecting piece is threadedly connected on the connecting section of the transmission screw rod.

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