CN210087919U - Transmission device of ultrasonic microprobe driver - Google Patents
Transmission device of ultrasonic microprobe driver Download PDFInfo
- Publication number
- CN210087919U CN210087919U CN201920806040.3U CN201920806040U CN210087919U CN 210087919 U CN210087919 U CN 210087919U CN 201920806040 U CN201920806040 U CN 201920806040U CN 210087919 U CN210087919 U CN 210087919U
- Authority
- CN
- China
- Prior art keywords
- driving motor
- tensioning
- microprobe
- transmission
- bracket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a transmission device of an ultrasonic microprobe driver, which comprises a rotary driving component and a linear driving component, wherein the rotary driving component comprises a first bracket, a first driving motor arranged on the first bracket in parallel and a main shaft used for driving the ultrasonic microprobe to rotate, and the first driving motor is in transmission connection with the main shaft through a first synchronous belt system; the linear driving assembly comprises a second bracket, a second driving motor arranged on the second bracket in parallel and a linear sliding platform used for driving the ultrasonic microprobe to advance and retreat, and the second driving motor is in transmission connection with the linear sliding platform through a second synchronous belt system. According to the transmission device, the rotary driving component and the linear driving component are respectively designed to be arranged in parallel, so that the overall size of the ultrasonic microprobe driver is reduced, and miniaturization of a product is more conveniently realized; in addition, by adopting a synchronous belt transmission connection mode, a multi-stage transmission arrangement mode is avoided, and the structure is greatly simplified.
Description
Technical Field
The utility model relates to an supersound microprobe technical field especially relates to a transmission of supersound microprobe driver.
Background
The ultrasonic microprobe driver comprises a rotary driving module and a linear driving module which respectively provide power for annular scanning and linear scanning. However, most of the rotary driving modules and linear driving modules of the existing ultrasonic microprobe drivers adopt a direct driving mode (the driving device and the driving module are arranged in a straight line) or a gear transmission mode. The direct-drive mode can increase the overall length, so that the product is difficult to miniaturize, the gear transmission stability is poor, multi-stage gear transmission needs to be designed on the large-distance transmission occasion, and the structure is complex.
In summary, how to solve the problem that the overall length of the transmission device of the ultrasonic microprobe driver is large and the miniaturization and the complex structure of the product are difficult to realize has become a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a transmission of supersound microprobe driver to the great miniaturization and the complicated problem of structure that are difficult to realize the product of the whole length of transmission of solving supersound microprobe driver.
In order to achieve the above object, the present invention provides a transmission device of an ultrasonic microprobe driver, including a rotary driving assembly and a linear driving assembly, wherein the rotary driving assembly includes a first bracket, a first driving motor and a spindle, which are arranged on the first bracket in parallel, and the first driving motor is in transmission connection with the spindle through a first synchronous belt system, and the spindle is used for driving the ultrasonic microprobe to rotate; the linear driving assembly comprises a second support, a second driving motor and a linear sliding platform, the second driving motor and the linear sliding platform are arranged on the second support in parallel, the second driving motor and the linear sliding platform are in transmission connection through a second synchronous belt system, and the linear sliding platform is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat.
Preferably, the first synchronous belt system comprises a first small belt pulley connected with the first driving motor, a first large belt pulley connected with the main shaft, and a first synchronous belt for driving and connecting the first small belt pulley and the first large belt pulley.
Preferably, the first timing belt system further comprises a first tensioning assembly for tensioning the first timing belt.
Preferably, the first tensioning assembly comprises a first tensioning frame, a tensioning bolt and a first locking bolt, the tensioning bolt is arranged on the first tensioning frame, the first driving motor is fixed on the first tensioning frame, the first tensioning frame can slide on the first tensioning frame, the sliding direction of the first tensioning frame is in the connecting line direction of the first driving motor and the spindle, the tensioning bolt is used for pulling the first tensioning frame, and the first locking bolt is used for locking the position of the first tensioning frame.
Preferably, a first waist-shaped through hole is formed in the first tensioning frame and is arranged along the connecting line direction of the first driving motor and the main shaft, a first locking screw hole is formed in the first support, and the first locking bolt penetrates through the first waist-shaped through hole and is fixed with the first locking screw hole.
Preferably, the second synchronous belt system comprises a second small pulley connected with the second driving motor, a second large pulley connected with the linear sliding platform, and a second synchronous belt for driving and connecting the second small pulley and the second large pulley.
Preferably, the linear sliding platform comprises a sliding rail, a sliding block in sliding fit with the sliding rail and a lead screw in threaded fit with the sliding block, and the sliding block is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat; the lead screw is fixedly connected with the second large belt wheel and used for driving the lead screw to rotate, and the lead screw rotates to drive the sliding block to move along the direction of the sliding rail.
Preferably, the second timing belt system further comprises a second tensioning assembly for tensioning the second timing belt.
Preferably, the second tensioning assembly comprises a second tensioning frame, a tightening bolt and a second locking bolt, the tightening bolt and the second locking bolt are arranged on the second support, the second driving motor is fixed on the second tensioning frame, the second tensioning frame can slide on the second support, the sliding direction of the second tensioning frame is in the direction of the connecting line of the second driving motor and the linear sliding platform, the tightening bolt is used for applying tightening force to the second tensioning frame to increase the distance between the second small belt wheel and the second large belt wheel, and the second locking bolt is used for locking the position of the second tensioning frame.
Preferably, a second waist-shaped through hole is formed in the second tensioning frame and is arranged along the connecting line direction of the second driving motor and the linear sliding platform, a second locking screw hole is formed in the second support, and the second locking bolt penetrates through the second waist-shaped through hole and is fixed with the second locking screw hole.
Compared with the introduction content of the background technology, the transmission device of the ultrasonic microprobe driver comprises a rotary driving assembly and a linear driving assembly, wherein the rotary driving assembly comprises a first bracket, a first driving motor and a spindle which are arranged on the first bracket in parallel, and the first driving motor is in transmission connection with the spindle through a first synchronous belt system, wherein the spindle is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to rotate; the linear driving assembly comprises a second support, a second driving motor and a linear sliding platform, wherein the second driving motor and the linear sliding platform are arranged on the second support in parallel, the second driving motor and the linear sliding platform are in transmission connection through a second synchronous belt system, and the linear sliding platform is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat. According to the transmission device, the first driving motor of the rotary driving component and the main shaft are designed to be arranged in parallel, so that the arrangement length of the rotary driving component is greatly reduced, and the second driving motor of the linear driving component and the linear sliding platform are designed to be arranged in parallel, so that the arrangement length of the linear driving component is greatly reduced, the overall size of an ultrasonic microprobe driver is reduced, and the miniaturization of a product is more conveniently realized; in addition, the first driving motor is in transmission connection with the main shaft through a first synchronous belt system, the second driving motor is in transmission connection with the linear sliding platform through a second synchronous belt system, and a synchronous belt transmission connection mode is adopted.
Drawings
Fig. 1 is a schematic structural diagram of a transmission device of an ultrasonic microprobe driver according to an embodiment of the present invention.
In the context of figure 1 of the drawings,
the device comprises a first support 1, a first driving motor 2, a main shaft 3, a second support 4, a second driving motor 5, a linear sliding platform 6, a first small belt wheel 7, a first large belt wheel 8, a first synchronous belt 9, a first tensioning frame 10, a tensioning bolt 11, a first locking bolt 12, a second small belt wheel 13, a second large belt wheel 14, a second synchronous belt 15, a second tensioning frame 16, a jacking bolt 17 and a second locking bolt 18.
Detailed Description
The core of the utility model is to provide a transmission of supersound microprobe driver to solve the great miniaturization and the complicated problem of structure that are difficult to realize the product of the whole length of transmission of supersound microprobe driver.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a transmission device of an ultrasonic microprobe driver, including a rotary driving assembly and a linear driving assembly, wherein the rotary driving assembly includes a first support 1, a first driving motor 2 and a spindle 3 which are arranged on the first support 1 in parallel, and the first driving motor 2 is in transmission connection with the spindle 3 through a first synchronous belt system, wherein the spindle 3 is connected with an ultrasonic microprobe to drive the ultrasonic microprobe to rotate; the linear driving assembly comprises a second bracket 4, a second driving motor 5 and a linear sliding platform 6, wherein the second driving motor 5 and the linear sliding platform 6 are arranged on the second bracket 4 in parallel, the second driving motor 5 is in transmission connection with the linear sliding platform 6 through a second synchronous belt system, and the linear sliding platform 6 is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat.
According to the transmission device, the first driving motor of the rotary driving component and the main shaft are designed to be arranged in parallel, so that the arrangement length of the rotary driving component is greatly reduced, and the second driving motor of the linear driving component and the linear sliding platform are designed to be arranged in parallel, so that the arrangement length of the linear driving component is greatly reduced, the overall size of an ultrasonic microprobe driver is reduced, and the miniaturization of a product is more conveniently realized; in addition, the first driving motor is in transmission connection with the main shaft through a first synchronous belt system, the second driving motor is in transmission connection with the linear sliding platform through a second synchronous belt system, and a synchronous belt transmission connection mode is adopted.
In some specific embodiments, the specific structure of the first synchronous belt system includes a first small pulley 7 connected to the first driving motor 2, a first large pulley 8 connected to the main shaft 3, and a first synchronous belt 9 for drivingly connecting the first small pulley 7 and the first large pulley 8. It should be noted that, generally, the diameter of the first small pulley is smaller than that of the first large pulley, because the initial rotation speed of the first driving motor is generally relatively large, and the first driving motor can act as a reducer when being transmitted to the large pulley through the small pulley. It is of course understood that when the first driving motor itself has a speed control function, the diameter of the first small pulley may be equal to or smaller than the diameter of the first large pulley. In addition, it should be noted that the above-mentioned manner of using the first synchronous belt for transmission is only a preferred example of the first synchronous belt transmission system of the present invention, and in practical application, a transmission manner of using a chain belt may also be used.
In a further embodiment, in order to ensure the stability of the transmission of the first synchronous belt system, the first synchronous belt system further comprises a first tensioning assembly for tensioning the first synchronous belt 9.
In a further embodiment, the specific structure of the first tensioning assembly may include a first tensioning frame 10, a tensioning bolt 11 and a first locking bolt 12, the tensioning bolt 11 is disposed on the first bracket 1, the first driving motor 2 is fixed on the first tensioning frame 10, the first tensioning frame 10 is capable of sliding on the first bracket 1 with the sliding direction in the connecting line direction of the first driving motor 2 and the spindle 3, the tensioning bolt 11 is used for pulling the first tensioning frame 10, and the first locking bolt 12 is used for locking the position of the first tensioning frame 10. The first support 1 is provided with a through hole for the tension bolt 11 to pass through, the tension bolt 11 passes through the through hole and is in threaded connection with the side end of the first tension frame 10, the first tension frame can be pulled by rotating the tension bolt 11, the distance between the first driving motor and the spindle can be increased, the tension force is increased, the position of the first tension frame can be locked through the first locking bolt, and therefore the tension stability is enhanced. It is understood that the above-mentioned manner of tensioning by using the tension bolt is only a preferred example of the present novel embodiment, and in practical application, other tensioning structure forms commonly used by those skilled in the art may also be used, such as a compression bolt, to move the first tensioning frame away from the main shaft, so as to implement the tensioning function.
In some more specific embodiments, the sliding between the first tensioning frame and the first bracket can be realized by providing a first waist-shaped through hole on the first tensioning frame 10 along a connecting line of the first driving motor 2 and the main shaft 3, providing a first locking screw hole on the first bracket 1, and passing the first locking bolt 12 through the first waist-shaped through hole and fixing with the first locking screw hole. In the practical application process of the structure, the first tensioning frame is pulled to slide relative to the first support through the tensioning bolt, and then the position locking is carried out through the first locking bolt. It is understood that the above arrangement manner using the kidney-shaped through holes is merely an example of the preferred structure of the sliding fit of the embodiment of the present invention, and in the practical application process, other sliding fit structural forms commonly used by those skilled in the art may also be used, such as a matching manner of a sliding rail and a sliding groove.
In addition, it should be noted that the specific structure of the second synchronous belt system may include a second small pulley 13 connected to the second driving motor 5, a second large pulley 14 connected to the linear sliding platform 6, and a second synchronous belt 15 for driving and connecting the second small pulley 13 and the second large pulley 14. It should also be noted that the diameter of the second small pulley is generally smaller than the diameter of the second large pulley, because the initial rotational speed of the second driving motor is generally relatively large, and the transmission to the large pulley through the small pulley can function as a speed reducer. It is of course understood that when the second driving motor itself has a speed control function, the diameter of the second small pulley may be equal to or smaller than the diameter of the second large pulley. In addition, it should be noted that the above-mentioned manner of using the second synchronous belt to transmit is only a preferred example of the second synchronous belt transmission system of the present invention, and in the practical application, a transmission manner of using a chain belt may also be used.
It should be noted here that, as those skilled in the art can understand, the specific structure of the linear sliding platform 6 for implementing the linear motion may include a slide rail, a slide block in sliding fit with the slide rail, and a lead screw in threaded fit with the slide block, where the slide block is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat; the lead screw is fixedly connected with the second large belt wheel and used for driving the lead screw to rotate, and the lead screw rotates to drive the sliding block to move along the direction of the sliding rail. The power of the second driving motor is transmitted to the second large belt wheel through the second synchronous belt by the second small belt wheel, then the second large belt wheel drives the screw rod to rotate, and the slider is driven to do linear motion in the axis direction of the screw rod (namely the length direction of the slide rail and the advance and retreat direction of the ultrasonic microprobe) through the rotation of the screw rod.
In a further embodiment, in order to ensure the stability of the transmission of the second synchronous belt system, the second synchronous belt system further comprises a second tensioning assembly for tensioning the second synchronous belt 15.
In a further embodiment, the specific structure of the second tensioning assembly may include a second tensioning frame 16, a tightening bolt 17 and a second locking bolt 18, the tightening bolt 17 is disposed on the second support 4, the second driving motor 5 is fixed on the second tensioning frame 16, the second tensioning frame 16 is capable of sliding on the second support 4 in a direction of a connection line between the second driving motor 5 and the linear sliding platform 6, the tightening bolt 17 is configured to apply a tightening force to the second tensioning frame 16 to increase a distance between the second small pulley 13 and the second large pulley 14, and the second locking bolt 18 is configured to lock a position of the second tensioning frame 16. Jacking bolt 16 and second support 4 threaded connection to the top is on the side end face of second tensioning frame 16, can realize the jacking power to the second tensioning frame through rotating jacking bolt, then through jacking bolt to the second tensioning frame to keeping away from the direction motion of sharp sliding platform, can increase the distance between second driving motor and the sharp sliding platform, increase the tensile force then, and can lock the position of second tensioning frame again through second locking bolt, thereby the stability of tensioning has been strengthened. It is understood that the above-mentioned manner of tensioning by using the tightening bolt is only a preferred example of the present invention, and in the practical application, other tensioning structure forms commonly used by those skilled in the art may also be used, such as a tensioning bolt, which moves the second tensioning frame away from the main shaft to achieve the tensioning function.
In some more specific embodiments, the above-mentioned sliding between the second tensioning frame and the second bracket can be realized by providing a second waist-shaped through hole on the second tensioning frame 16 along the connecting line direction of the second driving motor 5 and the linear sliding platform 6, providing a second locking screw hole on the second bracket 4, and passing the second locking bolt 18 through the second waist-shaped through hole and fixing with the second locking screw hole. In the practical application process, the second tensioning frame is pushed through the puller bolt to slide relative to the second support, and then the position locking is carried out through the second locking bolt. It is understood that the above arrangement manner using the kidney-shaped through holes is merely an example of the preferred structure of the sliding fit of the embodiment of the present invention, and in the practical application process, other sliding fit structural forms commonly used by those skilled in the art may also be used, such as a matching manner of a sliding rail and a sliding groove.
The transmission device of the ultrasonic microprobe driver provided by the utility model is described in detail above. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The transmission device of the ultrasonic microprobe driver comprises a rotary driving component and a linear driving component, and is characterized in that the rotary driving component comprises a first bracket (1), a first driving motor (2) and a spindle (3) which are arranged on the first bracket (1) in parallel, the first driving motor (2) is in transmission connection with the spindle (3) through a first synchronous belt system, and the spindle (3) is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to rotate; the linear driving assembly comprises a second support (4), a second driving motor (5) and a linear sliding platform (6), wherein the second driving motor (5) and the linear sliding platform (6) are arranged on the second support (4) in parallel, the second driving motor (5) and the linear sliding platform (6) are in transmission connection through a second synchronous belt system, and the linear sliding platform (6) is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat.
2. The transmission of an ultrasound microprobe driver according to claim 1, wherein the first synchronous belt system comprises a first small pulley (7) connected to the first drive motor (2), a first large pulley (8) connected to the main shaft (3), and a first synchronous belt (9) for drivingly connecting the first small pulley (7) and the first large pulley (8).
3. The ultrasound microprobe driver transmission device according to claim 2, wherein the first synchronous belt system further comprises a first tensioning assembly for tensioning the first synchronous belt (9).
4. The transmission of an ultrasound microprobe driver according to claim 3, wherein the first tensioning assembly comprises a first tensioning frame (10), a tensioning bolt (11) disposed on the first support (1), and a first locking bolt (12), the first driving motor (2) is fixed on the first tensioning frame (10), the first tensioning frame (10) is capable of sliding on the first support (1) in a direction of a line connecting the first driving motor (2) and the main shaft (3), the tensioning bolt (11) is used for pulling the first tensioning frame (10), and the first locking bolt (12) is used for locking a position of the first tensioning frame (10).
5. The transmission of an ultrasonic microprobe driver according to claim 4, wherein the first tension bracket (10) is provided with a first kidney-shaped through hole arranged along a connecting line direction of the first driving motor (2) and the main shaft (3), the first bracket (1) is provided with a first locking screw hole, and the first locking bolt (12) passes through the first kidney-shaped through hole and is fixed with the first locking screw hole.
6. The transmission of an ultrasound microprobe driver according to any one of claims 1 to 5, wherein the second timing belt system comprises a second small pulley (13) connected to the second driving motor (5), a second large pulley (14) connected to the linear sliding platform (6), and a second timing belt (15) for drivingly connecting the second small pulley (13) and the second large pulley (14).
7. The transmission device of the ultrasonic microprobe driver according to claim 6, wherein the linear sliding platform (6) comprises a slide rail, a slide block in sliding fit with the slide rail and a lead screw in threaded fit with the slide block, and the slide block is connected with the ultrasonic microprobe to drive the ultrasonic microprobe to advance and retreat; the lead screw is fixedly connected with the second large belt wheel and used for driving the lead screw to rotate, and the lead screw rotates to drive the sliding block to move along the direction of the sliding rail.
8. The ultrasound microprobe driver actuator according to claim 7, wherein the second timing belt system further comprises a second tensioning assembly for tensioning the second timing belt (15).
9. The transmission of an ultrasonic microprobe driver according to claim 8, the second tensioning assembly comprises a second tensioning frame (16), a jacking bolt (17) and a second locking bolt (18) which are arranged on the second bracket (4), the second drive motor (5) is fixed on the second tensioning frame (16), the second tensioning frame (16) can slide on the second bracket (4) and the sliding direction is in the connecting line direction of the second driving motor (5) and the linear sliding platform (6), the jacking bolt (17) is used for applying jacking force to the second tensioning frame (16) to increase the distance between the second small belt wheel (13) and the second large belt wheel (14), the second locking bolt (18) is used for locking the position of the second tensioning frame (16).
10. The transmission of an ultrasonic microprobe driver according to claim 9, wherein a second waist-shaped through hole is formed in the second tension frame (16) in a direction along a line connecting the second driving motor (5) and the linear sliding platform (6), a second locking screw hole is formed in the second bracket (4), and the second locking bolt (18) passes through the second waist-shaped through hole and is fixed to the second locking screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920806040.3U CN210087919U (en) | 2019-05-30 | 2019-05-30 | Transmission device of ultrasonic microprobe driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920806040.3U CN210087919U (en) | 2019-05-30 | 2019-05-30 | Transmission device of ultrasonic microprobe driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210087919U true CN210087919U (en) | 2020-02-18 |
Family
ID=69480963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920806040.3U Active CN210087919U (en) | 2019-05-30 | 2019-05-30 | Transmission device of ultrasonic microprobe driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210087919U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706648A (en) * | 2020-07-20 | 2020-09-25 | 昀智科技（北京）有限责任公司 | Speed reducer based on step pulley and synchronous belt and operation method |
-
2019
- 2019-05-30 CN CN201920806040.3U patent/CN210087919U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706648A (en) * | 2020-07-20 | 2020-09-25 | 昀智科技（北京）有限责任公司 | Speed reducer based on step pulley and synchronous belt and operation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2005027190A3 (en) | Ultrasonic lead screw motor | |
| CN210087919U (en) | Transmission device of ultrasonic microprobe driver | |
| CN203820352U (en) | Automatic rope arranging device for winch | |
| CN202030359U (en) | Winding machine | |
| CN204384789U (en) | A kind of jacking system of pantograph test bench | |
| CN102695588A (en) | Threaded fastener tightening and loosening device | |
| CN105563478B (en) | Remote transmission system for robot | |
| CN102889368B (en) | Twisting driving device used for transmitting pull pressure | |
| CN1319798C (en) | Steering actuator of independent steer-by-wire system | |
| CN201264811Y (en) | Variable frequency automatic tension type winch with self locking function | |
| CN106884947A (en) | A kind of multistage trapezoidal screw prevents locking device | |
| JP2004066264A (en) | Servo press | |
| CN212954056U (en) | Winding engine with wire arranging device | |
| CN107782614B (en) | Vehicle component rigidity testing loading device | |
| CN201678375U (en) | Large-stroke steel wire rope tensioning mechanism | |
| CN208411580U (en) | A kind of driving device for electric treadle | |
| CN203699318U (en) | Scissor-type lifting platform for sliding plate as well as sliding plate and sliding plate conveying line | |
| CN109629124B (en) | Sewing machine and sewing machine needle distance adjusting and limiting device | |
| CN201941047U (en) | Chain saw | |
| CN108789365B (en) | Screw drive pitch compensation and tensioning mechanism | |
| CN101328964B (en) | Rotation-stopping apparatus in servo cylinder | |
| CN205921504U (en) | Turning gear | |
| CN218341459U (en) | Bolt tightening tool | |
| JP2010157812A (en) | Antenna driving device | |
| CN112504817B (en) | Auxiliary structure for tensile testing machine and testing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |