A dual drive system for scanner

Abstract

The present invention relates to a scanner dual-drive system, comprising two sets of drive units symmetrically distributed on the left and right sides, wherein the drive units comprise a driving wheel device and a driven wheel device relatively mounted on a scanner frame, wherein the driven wheel device comprises a driven wheel assembly, a locking gear box, a locking handle, a transmission swing arm and an elastic push rod, wherein the driven wheel assembly comprises a support seat, an eccentric camshaft and a driven wheel, wherein the rotating part of the eccentric camshaft is mounted in the support seat, wherein the driven wheel is mounted at the lower end of the supporting shaft of the eccentric camshaft, wherein the locking gear box comprises a housing, a first rotating shaft and a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are provided with a first gear and a second gear meshing with each other, wherein one end of the locking handle is fixedly connected to the first rotating shaft, one end of the transmission swing arm is fixedly connected to the second rotating shaft, the other end of the transmission swing arm is hinged to one end of the elastic push rod, and the other end of the elastic push rod is hinged to the rotating part. The scanner has the advantages of stable structure, high reliability, strong adaptability and good safety.

Description

Technical Field

[0001] The invention relates to a driving device, in particular to a scanner dual-driving system for pipeline girth weld detection. Background Art

[0002] In the field of oil and natural gas transportation, it is often necessary to inspect the girth welds of pipelines to determine whether there are defects in the welds. With the development of technology, ultrasonic-based pipeline girth weld inspection systems have been widely used. As the core component of the pipeline girth weld inspection system, the scanner plays an important role in moving along the circumference of the pipeline and detecting weld data. The existing scanners mainly use a single drive system, which has problems of unstable operation and poor reliability in actual applications, and its driven wheel has defects such as loose locking and poor adaptability, which affects the safety and reliability of the inspection. Summary of the invention

[0003] The purpose of the present invention is to provide a scanner dual-drive system, which has the advantages of stable structure, high reliability, strong adaptability and good safety, and ensures the accuracy and reliability of weld detection.

[0004] In order to solve the above problems existing in the prior art, the present invention provides a scanner dual-drive system, including two sets of drive units symmetrically distributed on the left and right, wherein the drive unit includes a driving wheel device and a driven wheel device relatively installed on the scanner frame front and back, wherein the driven wheel device includes a driven wheel assembly, a locking gear box, a locking handle, a transmission swing arm and an elastic push rod, wherein the driven wheel assembly includes a support seat, an eccentric camshaft and a driven wheel, wherein the support seat is fixed on the scanner frame, and the eccentric camshaft includes a rotating part and a supporting shaft distributed up and down, wherein the axis of the supporting shaft is eccentric relative to the rotating part. To one side, the rotating part is installed in the support seat through a bearing, and the driven wheel is installed at the lower end of the support shaft through a bearing. The locking gear box includes a box body fixed on the scanner frame, and a first rotating shaft and a second rotating shaft are installed in the box body through bearings. The first rotating shaft and the second rotating shaft are correspondingly provided with a first gear and a second gear that mesh with each other. One end of the locking handle is fixedly connected to the protruding end of the first rotating shaft, one end of the transmission swing arm is fixedly connected to the protruding end of the second rotating shaft, and the other end of the transmission swing arm is hinged to one end of the elastic push rod, and the other end of the elastic push rod is hinged to the rotating part of the eccentric camshaft.

[0005] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the elastic push rod includes a cylinder, a left rod, a right rod and a compression spring, a left cover and a right cover are fixed to the two ends of the cylinder respectively, a left hinge joint is provided at the left end of the left rod, the right end of the left rod passes through the left cover and is fixed with a spring seat, a right hinge joint is provided at the right end of the right rod, the left end of the right rod is screwed into a threaded hole on the right cover, a fixing nut is screwed on the right rod outside the right cover, and the compression spring is in the cylinder and its two ends are pressed against the spring seat and the right cover respectively.

[0006] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the driving wheel device includes a housing, a transmission shaft, a motor and a driving shaft, the housing is fixed on the scanner frame, the transmission shaft is transversely installed in the housing through a bearing, a worm and a third gear are coaxially fixed on the transmission shaft, the motor is installed in the housing, a fourth gear meshing with the third gear is coaxially fixed on the output shaft of the motor, the upper half of the driving shaft is vertically installed in the housing through a bearing, a worm wheel meshing with the worm is coaxially fixed on the driving shaft, and a driving wheel is coaxially fixed to the lower end of the driving shaft.

[0007] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the shell includes an upper seat, the rear half of the upper seat is provided with a first mounting hole and a second mounting hole which pass through from left to right, the first protective cover and the second protective cover are fixed to the two sides of the rear half of the upper seat respectively, the front half of the upper seat is provided with a third mounting hole which is open at the lower end, and the lower seat is fixed at the opening of the third mounting hole; the transmission shaft is installed in the first mounting hole, the motor is installed in the second mounting hole, and the upper half of the drive shaft passes through the lower seat and is installed in the third mounting hole.

[0008] Furthermore, the present invention provides a dual-drive system for a scanner, wherein a first support sleeve and a second support sleeve are correspondingly installed at the two ends of the first mounting hole, a first limit platform is provided on the peripheral wall of the transmission shaft, a first bearing is clamped between the left side of the first limit platform and the first support sleeve, the worm is sleeved on the transmission shaft and a flat key is provided therebetween, the left end of the worm is pressed against the first limit platform, and a second bearing is clamped between the right end of the worm and the second support sleeve; a first pressure plate is coaxially fixed to the upper end of the driving shaft by screws, a second limit platform is provided on the peripheral wall of the driving shaft, the worm wheel is sleeved on the driving shaft and a flat key is provided therebetween, a third bearing and an upper washer are sleeved on the driving shaft between the worm wheel and the first pressure plate, the upper end of the outer ring of the third bearing is pressed against the upper seat, a lower washer and a fourth bearing are sleeved on the driving shaft between the worm wheel and the second limit platform, and the lower end of the outer ring of the fourth bearing is pressed against the lower seat.

[0009] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the third gear is fixed to one end of a transmission shaft, a fifth gear is coaxially fixed to the other end of the transmission shaft, an encoder is mounted on the second support sleeve, and a sixth gear meshing with the fifth gear is coaxially fixed to the rotating shaft of the encoder.

[0010] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the driving wheel includes a wheel seat and a second pressure plate coaxially fixed to the lower end of the driving shaft by screws, the wheel seat is cylindrical with a larger upper portion and a smaller lower portion, a limiting groove is provided on the top of the wheel seat, the driving shaft is provided with a clamping table that cooperates with the limiting groove, an upper knurled wheel, a switch plate and a lower knurled wheel are sleeved on the lower half of the wheel seat, and a flat key is provided between the upper knurled wheel, the switch plate and the lower knurled wheel and the wheel seat.

[0011] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the support seat includes a flange plate and a connecting sleeve which are connected as one body, a first flange cover is coaxially fixed on the flange plate, and a third limit platform is provided at the lower end of the inner wall of the connecting sleeve; a fourth limit platform is provided at the lower end of the rotating part, a cylindrical adapter seat is coaxially fixed on the upper side of the rotating part, a rotating swing arm is fixed on the upper side of the adapter seat, and a hinge column is fixed on the rotating swing arm; a fifth bearing and a sixth bearing are arranged side by side between the connecting sleeve and the rotating part, the upper ends of the inner and outer rings of the fifth bearing are correspondingly pressed on the adapter seat and the first flange cover, and the lower ends of the inner and outer rings of the sixth bearing are correspondingly pressed on the fourth limit platform and the third limit platform.

[0012] Furthermore, the present invention provides a dual-drive system for a scanner, wherein a connecting column is threadedly installed on the lower end of the support shaft, a fifth limit platform is provided at the lower end of the connecting column, a sixth limit platform is provided at the lower end of the inner wall of the driven wheel, a second flange cover is coaxially fixed to the upper side of the driven wheel, a seventh bearing and an eighth bearing are arranged side by side between the driven wheel and the connecting column, the upper ends of the inner and outer rings of the seventh bearing are correspondingly pressed on the support shaft and the second flange cover, and the lower ends of the inner and outer rings of the eighth bearing are correspondingly pressed on the fifth limit platform and the sixth limit platform.

[0013] Furthermore, the present invention provides a dual-drive system for a scanner, wherein the housing includes a bottom shell and a cover plate fixed to the bottom shell by screws; an oil seal is sleeved between the drive shaft and the lower seat, sealing rings are respectively provided between the first protective cover, the second protective cover, the lower seat and the upper seat, and a sealing threading head is provided on the second protective cover.

[0014] Compared with the prior art, the dual-drive system of the scanner of the present invention has the following advantages: the present invention sets two sets of drive units symmetrically distributed on the left and right sides, so that the drive units are provided with a driving wheel device and a driven wheel device relatively installed on the scanner frame in the front and rear sides, and the driven wheel device includes a driven wheel assembly, a locking gear box, a locking handle, a transmission swing arm and an elastic push rod, and the driven wheel assembly is provided with a support seat, an eccentric cam shaft and a driven wheel, and the support seat is fixed on the scanner frame, so that the eccentric cam shaft is provided with a rotating part and a supporting shaft distributed up and down, and the axis of the supporting shaft is biased to one side relative to the rotating part. , install the rotating part in the support seat through the bearing, install the driven wheel at the lower end of the support shaft through the bearing, let the locking gear box be set in a box body fixed on the scanner frame, install the first rotating shaft and the second rotating shaft in the box body through the bearing, and set the first gear and the second gear meshing with each other on the first rotating shaft and the second rotating shaft, and let one end of the locking handle be fixedly connected to the protruding end of the first rotating shaft, and let one end of the transmission swing arm be fixedly connected to the protruding end of the second rotating shaft, and let the other end of the transmission swing arm be hinged to one end of the elastic push rod, and let the other end of the elastic push rod be hinged to the rotating part of the eccentric camshaft. Thus, a scanner dual drive system with stable structure, high reliability, strong adaptability and good safety is formed. In practical applications, the driving wheel device and the driven wheel device are clamped on both sides of the track arranged along the circumference of the pipeline, and the driving force provided by the driving wheel device can make the scanner move along the track. The present invention improves the balance and stability of the structure by setting two groups of drive units that are symmetrically distributed on the left and right, and improves the reliability of the scanner operation on the other hand. When one group of drive units fails or fails, the other group of drive units can continue to drive the scanner to run along the track; by setting the driven wheel device with a driven wheel assembly, a locking gear box, a locking handle, a transmission swing arm and an elastic push rod, the purpose of locking or unlocking the driven wheel can be achieved by simply operating the locking handle, which has the advantages of convenient operation, small space occupation, strong adaptability and reliable locking. The specific process is as follows: by rotating the locking handle, the first gear and the second gear will rotate relative to each other and drive the transmission swing arm to rotate, the rotation of the transmission swing arm will produce a push-pull effect on the elastic push rod, and the push-pull action of the elastic push rod will cause the eccentric camshaft to rotate with the rotating part as the axis. Because the axis of the support shaft is biased to one side relative to the rotating part, the rotation of the eccentric camshaft will cause the driven wheel to be squeezed on the track or out of the track, thereby achieving the technical purpose of locking or unlocking the driven wheel. When locking, rotate the locking handle to make the transmission swing arm push the elastic push rod forward. The forward pushing action of the elastic push rod causes the eccentric camshaft to rotate and squeeze the driven wheel onto the track. At this time, the locking handle should be rotated to the upper side of the scanner frame to save space. When unlocking, rotate the locking handle in the opposite direction to make the transmission swing arm pull the elastic push rod backward. The backward pulling action of the elastic push rod causes the eccentric camshaft to rotate in the opposite direction and causes the driven wheel to leave the track.The present invention uses a locking gear box as a locking transmission mechanism, which has the advantages of simple structure, reliable transmission and small space occupation; when locking, the elastic force of the elastic push rod can make the driven wheel always squeezed on the track, thereby improving the reliability of locking and ensuring the stability and safety of the scanner movement.

[0015] The following is a further detailed description of a scanner dual-drive system of the present invention in conjunction with the specific implementation modes shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a dual-drive system of a scanner according to the present invention;

[0017] Figure 2 A top view of a dual-drive system for a scanner according to the present invention;

[0018] Figure 3 A three-dimensional scanner dual-drive system of the present invention Figure 1 ;

[0019] Figure 4 A three-dimensional scanner dual-drive system of the present invention Figure 2 ;

[0020] Figure 5 It is a front view of a driven wheel assembly in a dual-drive system of a scanner according to the present invention;

[0021] Figure 6 A top view of a driven wheel assembly in a dual-drive system of a scanner according to the present invention;

[0022] Figure 7 A three-dimensional diagram of a driven wheel assembly in a dual-drive system of a scanner according to the present invention;

[0023] Figure 8 for Figure 6 AA view in the figure;

[0024] Fig. 9 It is a front view of a locking gear box in a dual-drive system of a scanner of the present invention;

[0025] Fig.10 for Fig. 9 BB view in the figure;

[0026] Fig.11 A top view of a locking gear box in a dual-drive system of a scanner according to the present invention;

[0027] Fig.12 A three-dimensional diagram of a locking gear box in a dual-drive system of a scanner according to the present invention;

[0028] Fig.13 It is a front view of an elastic push rod in a dual-drive system of a scanner of the present invention;

[0029] Fig.14 A top view of an elastic push rod in a dual-drive system of a scanner according to the present invention;

[0030] Fig.15 for Fig.14 CC view in the figure;

[0031] Fig.16 A three-dimensional diagram of an elastic push rod in a dual-drive system of a scanner according to the present invention;

[0032] Fig.17 It is a front view of a driving wheel device in a dual-drive system of a scanner of the present invention;

[0033] Fig.18 A bottom view of a driving wheel device in a dual-drive system of a scanner according to the present invention;

[0034] Fig.19 A three-dimensional diagram of a driving wheel device in a dual-drive system of a scanner according to the present invention Figure 1 ;

[0035] Fig. 20 A three-dimensional diagram of a driving wheel device in a dual-drive system of a scanner according to the present invention Figure 2 ;

[0036] Fig.21 for Fig.17 DD view in the figure;

[0037] Fig. 22 for Fig.17 EE view in the diagram. DETAILED DESCRIPTION

[0038] First of all, it should be explained that the directional words such as up, down, left, right, front and back described in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution and the scope of protection of the present invention.

[0039] like Figures 1 to 22The specific embodiment of the scanner dual drive system of the present invention shown in the figure includes two sets of drive units symmetrically distributed on the left and right sides, and the drive units include a driving wheel device and a driven wheel device installed on the scanner frame 100 in a front-to-back manner. The driven wheel device is provided with a driven wheel assembly 1, a locking gear box 2, a locking handle 3, a transmission swing arm 4 and an elastic push rod 5. The driven wheel assembly 1 is provided with a support seat 11, an eccentric cam shaft 12 and a driven wheel 13, and the support seat 11 is fixed on the scanner frame 100, and the eccentric cam shaft 12 is provided with a rotating part 121 and a supporting shaft 122 distributed up and down, and the axis of the supporting shaft 122 is biased to one side relative to the rotating part 121, and the rotating part 121 is installed in the support seat 11 through a bearing, and the driven wheel 13 is installed at the lower end of the supporting shaft 122 through a bearing. The locking gear box 2 is provided in a box body 21 fixed on the scanner frame 100, a first rotating shaft 22 and a second rotating shaft 23 are installed in the box body 21 through bearings, and a first gear 24 and a second gear 25 meshing with each other are correspondingly provided on the first rotating shaft 22 and the second rotating shaft 23. One end of the locking handle 3 is fixedly connected to the extended end of the first rotating shaft 22, one end of the transmission swing arm 4 is fixedly connected to the extended end of the second rotating shaft 23, the other end of the transmission swing arm 4 is hinged to one end of the elastic push rod 5, and the other end of the elastic push rod 5 is hinged to the rotating portion 121 of the eccentric cam shaft 12.

[0040] The above structural arrangement constitutes a dual-drive system for a scanner with a stable structure, high reliability, strong adaptability and good safety. In practical applications, the driving wheel device and the driven wheel device are clamped on both sides of the track arranged along the circumference of the pipeline, and the driving force provided by the driving wheel device can make the scanner move along the track. The present invention improves the balance and stability of the structure on the one hand, and the reliability of the scanner operation on the other hand by setting two groups of drive units distributed symmetrically on the left and right. When one group of drive units fails or fails, the other group of drive units can continue to drive the scanner to run along the track. By setting the driven wheel device with a driven wheel assembly 1, a locking gear box 2, a locking handle 3, a transmission swing arm 4 and an elastic push rod 5, the purpose of locking or unlocking the driven wheel can be achieved by operating the locking handle 3, which has the advantages of convenient operation, small space occupation, strong adaptability and reliable locking. The specific process is as follows: by rotating the locking handle 3, the first gear 24 and the second gear 25 will rotate relative to each other and drive the transmission swing arm 4 to rotate. The rotation of the transmission swing arm 4 will produce a push-pull effect on the elastic push rod 5, and the push-pull action of the elastic push rod 5 will cause the eccentric camshaft 12 to rotate around the rotating part 121 as the axis. Since the axis of the support shaft 122 is biased to one side relative to the rotating part 121, the rotation of the eccentric camshaft 12 will cause the driven wheel 13 to be squeezed onto the track or out of the track, thereby achieving the technical purpose of locking or unlocking the driven wheel. When locking, the locking handle 3 is rotated to make the transmission swing arm 4 push forward the elastic push rod 5. The forward push of the elastic push rod 5 rotates the eccentric cam shaft 12 and squeezes the driven wheel 13 on the track. At this time, the locking handle 3 should be rotated to the upper side of the scanner frame 100 to save space; when unlocking, the locking handle 3 is reversely rotated to make the transmission swing arm 4 pull backward the elastic push rod 5. The backward pull of the elastic push rod 5 reverses the eccentric cam shaft 12 and makes the driven wheel 13 leave the track. The present invention uses the locking gear box 2 as the locking transmission mechanism, which has the advantages of simple structure, reliable transmission and small space occupation; when locking, the elastic force of the elastic push rod 5 can make the driven wheel 13 always squeeze on the track, which improves the reliability of locking and ensures the stability and safety of the scanner movement. It should be noted that the forward push direction of the elastic push rod 5 should be in the same direction as the offset direction of the support shaft 122 to ensure that the driven wheel 13 is squeezed on the track instead of away from the track when locking. In practical applications, the present invention usually allows the axis of the support shaft 122 to be offset to the left or right relative to the rotating portion 121, and the axis of the support shaft 122 and the hinge point of the elastic push rod 5 form a 90-degree central angle relative to the axis of the rotating portion 121 to enhance the force application effect of the elastic push rod 5; in order to prevent the locking handle 3 from rotating by itself when locking, the present invention also provides a mechanism for limiting the locking handle 3 on the scanner frame 100 (not shown in the figure).

[0041] As a specific implementation method, Figures 13 to 16As shown, the present invention provides a cylinder 51, a left rod 52, a right rod 53 and a compression spring 54 for the elastic push rod 5. The left cover 511 and the right cover 512 are fixed at the two ends of the cylinder 51, a left hinge 521 is provided at the left end of the left rod 52, so that the right end of the left rod 52 passes through the left cover 511 and fixes the spring seat 522, a right hinge 531 is provided at the right end of the right rod 53, so that the left end of the right rod 53 is screwed into the threaded hole on the right cover 512, a set nut 532 is screwed on the right rod 53 outside the right cover 512, the compression spring 54 is placed in the cylinder 51, and the two ends of the compression spring 54 are pressed against the spring seat 522 and the right cover 512. The elastic push rod 5 provided with this structure has the advantages of stable structure and strong adaptability, and the technical purpose of adjusting the pressing force of the elastic push rod 5 can be achieved by controlling the length of the right rod 53 screwed into the right cover 512.

[0042] As a specific implementation, as shown in FIG. Figures 17 to 22 As shown, the present invention provides a driving wheel device with a housing 6, a transmission shaft 7, a motor 8 and a drive shaft 9. The housing 6 is fixed on the scanner frame 100, the transmission shaft 7 is transversely installed in the housing 6 through a bearing, and a worm 71 and a third gear 72 are coaxially fixed on the transmission shaft 7, the motor 8 is installed in the housing 6, and a fourth gear 81 meshing with the third gear 72 is coaxially fixed on the output shaft of the motor 8, the upper half of the drive shaft 9 is vertically installed in the housing 6 through a bearing, and a worm wheel 91 meshing with the worm 71 is coaxially fixed on the drive shaft 9, and a driving wheel 92 is coaxially fixed at the lower end of the drive shaft 9. The driving wheel device of this structure improves the compactness of the structure and reduces the occupied space by providing a housing 6 and arranging a transmission shaft 7, a motor 8 and a drive shaft 9 in the housing 6; by providing a worm gear kinematic pair, the smoothness of the transmission is improved while achieving deceleration, thereby improving the stability and safety reliability of the scanner movement. As a specific embodiment, the present invention provides an upper seat 61 for the housing 6, and a first mounting hole and a second mounting hole that are through-through are provided in the rear half of the upper seat 61, and a first protective cover 62 and a second protective cover 63 are fixed on both sides of the rear half of the upper seat 61; a third mounting hole with an opening at the lower end is provided in the front half of the upper seat 61, and a lower seat 64 is fixed at the opening of the third mounting hole. Among them, the transmission shaft 7 is installed in the first mounting hole, the motor 8 is installed in the second mounting hole, and the upper half of the drive shaft 9 passes through the lower seat 64 and is installed in the third mounting hole. This setting has the advantage of convenient disassembly and assembly, and the first protective cover 62 and the second protective cover 63 can effectively protect the transmission shaft 7, the motor 8, the third gear 72, the fourth gear 81, etc., thereby improving safety and reliability.

[0043] As a specific embodiment, the present invention enables the transmission shaft 7 to adopt the following installation method: the first support sleeve 65 and the second support sleeve 66 are correspondingly installed at the two ends of the first installation hole by screws, the first limit platform 73 is set on the peripheral wall of the transmission shaft 7, the first bearing 74 is clamped between the left side of the first limit platform 73 and the first support sleeve 65, the worm 71 is sleeved on the transmission shaft 7 and a flat key is set between the two, so that the left end of the worm 71 is pressed on the first limit platform 73, and the second bearing 75 is clamped between the right end of the worm 71 and the second support sleeve 66. This installation method has the advantages of compact structure, convenient disassembly and maintenance, and stable operation. As a specific embodiment, the present invention makes the drive shaft 9 adopt the following installation method: the first pressure plate 93 is coaxially fixed on the upper end of the drive shaft 9 by screws, the second limit platform 94 is set on the peripheral wall of the drive shaft 9, the worm wheel 91 is sleeved on the drive shaft 9 and a flat key is set between the two, the third bearing 95 and the upper washer 96 are sleeved on the drive shaft 9 between the worm wheel 91 and the first pressure plate 93, and the upper end of the outer ring of the third bearing 95 is pressed on the upper seat 61, and the lower washer 97 and the fourth bearing 98 are sleeved on the drive shaft 9 between the worm wheel 91 and the second limit platform 94, and the lower end of the outer ring of the fourth bearing 98 is pressed on the lower seat 64. This installation method also has the advantages of compact structure, convenient disassembly and maintenance, and smooth operation.

[0044] As an optimization solution, in this specific embodiment, the third gear 72 is fixed to one end of the transmission shaft 7, and the fifth gear 76 is coaxially fixed to the other end of the transmission shaft 7, a second protective cover encoder 77 is installed on the second support sleeve 66, and a sixth gear 78 meshing with the fifth gear 76 is coaxially fixed on the rotating shaft of the encoder 77, wherein the third gear 72 and the encoder 77 are correspondingly located in the first protective cover 62 and the second protective cover 63. This structure is set up in the process of the scanner moving, and the moving path can be recorded by the encoder 77 to determine the position of the weld defect, thereby enhancing functionality and practicality. As a specific implementation, the present invention makes the driving wheel 92 adopt the following structural form: a wheel seat 921 and a second pressure plate 922 are coaxially fixed to the lower end of the driving shaft 9 by screws, so that the wheel seat 921 adopts a cylindrical structure with a larger upper part and a smaller lower part, a limit groove is set on the top of the wheel seat 921, and a clamping table matched with the limit groove is set on the driving shaft 9, and a knurled wheel 923, a switch plate 924 and a lower knurled wheel 925 are sleeved on the lower half of the wheel seat 921, and a flat key is set between the upper knurled wheel 923, the switch plate 924 and the lower knurled wheel 925 and the wheel seat 921. The driving wheel 92 of this structure has the advantages of easy assembly and disassembly, stable operation, safety and reliability. The knurled wheel can avoid relative sliding between the driving wheel and the track, ensuring the stability of the scanner operation and the reliability of detection. The switch plate is set to form two upper and lower grooves on the driving wheel, reducing the risk of the driving wheel falling off the track and improving safety.

[0045] As a specific implementation method, Figures 5 to 8 As shown, the present invention makes the rotating part 121 of the eccentric camshaft 12 adopt the following installation method: the support seat 11 is provided with a flange 111 and a connecting sleeve 112 which are connected as one body, the first flange cover 14 is coaxially fixed on the flange 111, and the third limit platform 113 is provided at the lower end of the inner wall of the connecting sleeve 112; the fourth limit platform 123 is provided at the lower end of the rotating part 121, the cylindrical adapter seat 15 is coaxially fixed on the upper side of the rotating part 121, the rotating swing arm 16 is fixed on the upper side of the adapter seat 15, and the hinge column 17 is fixed on the rotating swing arm 16; the fifth bearing 124 and the sixth bearing 125 are sleeved side by side between the connecting sleeve 112 and the rotating part 121, so that the upper ends of the inner and outer rings of the fifth bearing 124 are correspondingly pressed on the adapter seat 15 and the first flange cover 14, and the lower ends of the inner and outer rings of the sixth bearing 125 are correspondingly pressed on the fourth limit platform 123 and the third limit platform 113. This arrangement has the advantages of stable structure, convenient disassembly and maintenance, and smooth rotation. By arranging the hinged column 17, it can be conveniently hinged with the elastic push rod 5, thereby improving the convenience of the connection operation.

[0046] As a specific embodiment, the present invention makes the driven wheel 13 adopt the following installation method: the connecting column 18 is installed by threading at the lower end of the support shaft 122, the fifth limit platform 181 is set at the lower end of the connecting column 18, the sixth limit platform 131 is set at the lower end of the inner wall of the driven wheel 13, the second flange cover 19 is coaxially fixed on the upper side of the driven wheel 13, and the seventh bearing 132 and the eighth bearing 133 are sleeved side by side between the driven wheel 13 and the connecting column 18, so that the upper ends of the inner and outer rings of the seventh bearing 132 are correspondingly pressed on the support shaft 122 and the second flange cover 19, and the lower ends of the inner and outer rings of the eighth bearing 133 are correspondingly pressed on the fifth limit platform 181 and the sixth limit platform 131. This arrangement also has the advantages of stable structure, convenient disassembly and maintenance, and stable rotation. Among them, the driven wheel 13 is provided with two upper and lower grooves, which reduces the risk of falling off the track and improves safety.

[0047] It should be noted that, in actual applications, the present invention usually makes the box body 21 adopt a structure including a bottom shell 211 and a cover plate 212, and the cover plate 212 is fixed to the bottom shell 211 by screws to facilitate disassembly and assembly; in order to enhance the stability of the structure and performance, the present invention also sets an oil seal 99 between the drive shaft 9 and the lower seat 64, and sets sealing rings between the first protective cover 62, the second protective cover 63 and the lower seat 64 and the upper seat 61, and sets a sealing threading head 67 on the second protective cover 63, so as to facilitate the connection of the encoder while ensuring the sealing performance.

[0048] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A scanner dual drive system, characterized in that: The invention comprises two sets of drive units which are symmetrically distributed on the left and right sides. The drive units comprise a driving wheel device and a driven wheel device which are relatively mounted on the scanner frame in the front and rear directions. The driving wheel device comprises a housing (6), a transmission shaft (7), a motor (8) and a drive shaft (9). The housing (6) is fixed on the scanner frame. The transmission shaft (7) is transversely mounted in the housing (6) via a bearing. A worm (71) and a third gear (72) are coaxially fixed on the transmission shaft (7). The motor (8) is mounted in the housing (6). A fourth gear (81) meshing with the third gear (72) is coaxially fixed on the output shaft of the motor (8). The upper half of the drive shaft (9) is vertically mounted in the housing (6) via a bearing. A gear (81) meshing with the third gear (72) is coaxially fixed on the drive shaft (9). 1) a meshing worm gear (91), a driving wheel (92) being coaxially fixed to the lower end of a driving shaft (9); the driven wheel device comprising a driven wheel assembly (1), a locking gear box (2), a locking handle (3), a transmission swing arm (4) and an elastic push rod (5); the driven wheel assembly (1) comprising a support seat (11), an eccentric cam shaft (12) and a driven wheel (13); the support seat (11) being fixed to a scanner frame; the eccentric cam shaft (12) comprising a rotating portion (121) and a supporting shaft (122) distributed up and down; the axis of the supporting shaft (122) being biased to one side relative to the rotating portion (121); the rotating portion (121) being mounted in the support seat (11) via a bearing; and the driven wheel (13) being mounted on the supporting shaft (122) via a bearing. ), the locking gear box (2) comprises a box body (21) fixed on the scanner frame, a first rotating shaft (22) and a second rotating shaft (23) are installed in the box body (21) through bearings, the first rotating shaft (22) and the second rotating shaft (23) are respectively provided with a first gear (24) and a second gear (25) meshing with each other, one end of the locking handle (3) is fixedly connected to the protruding end of the first rotating shaft (22), one end of the transmission swing arm (4) is fixedly connected to the protruding end of the second rotating shaft (23), the other end of the transmission swing arm (4) is hinged to one end of the elastic push rod (5), and the other end of the elastic push rod (5) is hinged to the rotating part (121) of the eccentric cam shaft (12); the elastic push rod (5) comprises a cylinder (51), a left rod ( 52), a right rod (53) and a compression spring (54), a left cover (511) and a right cover (512) are fixed to the two ends of the cylinder (51) correspondingly, a left hinge joint (521) is provided at the left end of the left rod (52), the right end of the left rod (52) passes through the left cover (511) and is fixed with a spring seat (522), a right hinge joint (531) is provided at the right end of the right rod (53), the left end of the right rod (53) is screwed into a threaded hole on the right cover (512), a fixing nut (532) is screwed onto the right rod (53) outside the right cover (512), the compression spring (54) is in the cylinder (51) and its two ends are pressed against the spring seat (522) and the right cover (512) correspondingly, and a mechanism for limiting the locking handle (3) is provided on the scanner frame.

2. A scanner dual drive system according to claim 1, characterized in that: The housing (6) comprises an upper seat (61), a rear half of the upper seat (61) is provided with a first mounting hole and a second mounting hole which are through-going from left to right, a first protective cover (62) and a second protective cover (63) are fixed to the two sides of the rear half of the upper seat (61) respectively, a front half of the upper seat (61) is provided with a third mounting hole with an opening at the lower end, and a lower seat (64) is fixed at the opening of the third mounting hole; the transmission shaft (7) is mounted in the first mounting hole, the motor (8) is mounted in the second mounting hole, and the upper half of the drive shaft (9) passes through the lower seat (64) and is mounted in the third mounting hole.

3. The scanner dual drive system according to claim 2, characterized in that: A first support sleeve (65) and a second support sleeve (66) are correspondingly installed at the two ends of the first mounting hole; a first limit platform (73) is provided on the peripheral wall of the transmission shaft (7); a first bearing (74) is clamped between the left side of the first limit platform (73) and the first support sleeve (65); the worm (71) is sleeved on the transmission shaft (7) and a flat key is provided between the two; the left end of the worm (71) is pressed against the first limit platform (73); a second bearing (75) is clamped between the right end of the worm (71) and the second support sleeve (66); the upper end of the drive shaft (9) is coaxially fixed by a screw A first pressure plate (93) is fixed, a second limiting platform (94) is provided on the peripheral wall of the drive shaft (9), the worm wheel (91) is sleeved on the drive shaft (9) and a flat key is provided between the two, a third bearing (95) and an upper washer (96) are sleeved on the drive shaft (9) between the worm wheel (91) and the first pressure plate (93), the upper end of the outer ring of the third bearing (95) is pressed against the upper seat (61), a lower washer (97) and a fourth bearing (98) are sleeved on the drive shaft (9) between the worm wheel (91) and the second limiting platform (94), and the lower end of the outer ring of the fourth bearing (98) is pressed against the lower seat (64).

4. The scanner dual drive system according to claim 3, characterized in that: The third gear (72) is fixed to one end of the transmission shaft (7), a fifth gear (76) is coaxially fixed to the other end of the transmission shaft (7), an encoder (77) is mounted on the second support sleeve (66), and a sixth gear (78) meshing with the fifth gear (76) is coaxially fixed to the rotating shaft of the encoder (77).

5. The scanner dual drive system according to claim 4, characterized in that: The driving wheel (92) comprises a wheel seat (921) and a second pressure plate (922) which are coaxially fixed to the lower end of the driving shaft (9) by screws; the wheel seat (921) is cylindrical with a larger upper portion and a smaller lower portion; a limiting groove is provided at the top of the wheel seat (921); the driving shaft (9) is provided with a clamping table which cooperates with the limiting groove; an upper knurled wheel (923), a switch plate (924) and a lower knurled wheel (925) are sleeved on the lower half of the wheel seat (921); and a flat key is provided between the upper knurled wheel (923), the switch plate (924) and the lower knurled wheel (925) and the wheel seat (921).

6. A scanner dual drive system according to claim 5, characterized in that: The support seat (11) comprises a flange (111) and a connecting sleeve (112) connected as one body, a first flange cover (14) being coaxially fixed on the flange (111), and a third limit platform (113) being provided at the lower end of the inner wall of the connecting sleeve (112); a fourth limit platform (123) being provided at the lower end of the rotating portion (121), a cylindrical transfer seat (15) being coaxially fixed on the upper side of the rotating portion (121), and a rotating A swing arm (16), a hinge column (17) is fixed on the rotating swing arm (16); a fifth bearing (124) and a sixth bearing (125) are sleeved side by side between the connecting sleeve (112) and the rotating portion (121); the upper ends of the inner and outer rings of the fifth bearing (124) are pressed against the transfer seat (15) and the first flange cover (14) respectively, and the lower ends of the inner and outer rings of the sixth bearing (125) are pressed against the fourth limit platform (123) and the third limit platform (113) respectively.

7. The scanner dual drive system according to claim 6, characterized in that: A connecting column (18) is threadedly mounted on the lower end of the support shaft (122), a fifth limiting platform (181) is provided on the lower end of the connecting column (18), a sixth limiting platform (131) is provided on the lower end of the inner wall of the driven wheel (13), a second flange cover (19) is coaxially fixed on the upper side of the driven wheel (13), a seventh bearing (132) and an eighth bearing (133) are sleeved side by side between the driven wheel (13) and the connecting column (18), the upper ends of the inner and outer rings of the seventh bearing (132) are correspondingly pressed on the support shaft (122) and the second flange cover (19), and the lower ends of the inner and outer rings of the eighth bearing (133) are correspondingly pressed on the fifth limiting platform (181) and the sixth limiting platform (131).

8. The scanner dual drive system according to claim 7, characterized in that: The box body (21) comprises a bottom shell (211) and a cover plate (212) fixed to the bottom shell (211) by screws; an oil seal (99) is sleeved between the drive shaft (9) and the lower seat (64); sealing rings are respectively provided between the first protective cover (62), the second protective cover (63), the lower seat (64) and the upper seat (61); and a sealing threading head (67) is provided on the second protective cover (63).

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