Transmission mechanism of pharmaceutical machine

Abstract

The transmission mechanism of the pharmaceutical machine comprises a frame body and a transmission assembly, the transmission assembly comprises a driving piece, a main shaft rod, a swing piece and a cam disc, the driving piece is arranged on the frame body, the main shaft rod is rotationally arranged on the frame body, one end of the main shaft rod is connected with an output shaft of the driving piece, and the cam disc is coaxially arranged on the main shaft rod. An eccentric groove is formed in the cam disc, the swing part is rotationally arranged on the frame body, one end of the swing part is in sliding connection with the sliding groove, the other end of the swing part is rotationally connected with the pharmaceutical mechanism, and when the driving part is used for driving the main shaft rod to rotate, one end of the swing part slides along the sliding groove, and then the swing part drives the pharmaceutical mechanism to lift and slide; the cam disc comprises two groove blocks, sliding grooves are formed in the two groove blocks, and when the two groove blocks jointly clamp the main shaft rod, the two sliding grooves are connected end to end to jointly form an eccentric groove. Therefore, the maintenance time of the transmission mechanism of the pharmaceutical machine and the adjustment time of the transmission precision are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of pharmaceutical equipment, and in particular to a transmission mechanism for a pharmaceutical machine. Background Technology

[0002] In the modern pharmaceutical industry, pharmaceutical machinery plays a crucial role. It primarily consists of mechanical devices and equipment used for processing and handling raw medicinal materials. In the pharmaceutical field, efficient, precise, and reliable pharmaceutical equipment is key to ensuring drug quality and production efficiency. As one of the core production equipment, the performance of the transmission mechanism of pharmaceutical machinery is of paramount importance.

[0003] However, existing pharmaceutical machine transmission mechanisms have the following shortcomings in practical use: During long-term operation, the friction between various mechanical parts in traditional transmission mechanisms easily leads to wear. When replacing these worn parts, other transmission components must be disassembled and replaced simultaneously. Furthermore, after reinstallation, the transmission precision of each mechanical component needs to be readjusted, significantly increasing the equipment's maintenance time. Therefore, this application proposes a pharmaceutical machine transmission mechanism. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pharmaceutical machine transmission mechanism that facilitates the disassembly and disassembly of worn mechanical parts to reduce equipment maintenance time.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A pharmaceutical machine transmission mechanism, comprising:

[0007] Frame; and

[0008] A transmission assembly includes a drive component, a main shaft, a swing component, and a cam disk. The drive component is mounted on the frame, and the main shaft is rotatably mounted on the frame. One end of the main shaft is connected to the output shaft of the drive component. The cam disk is coaxially mounted on the main shaft and has an eccentric groove. The swing component is rotatably mounted on the frame, with one end slidably connected to the eccentric groove and the other end rotatably connected to the pharmaceutical mechanism. When the drive component drives the main shaft to rotate, one end of the swing component slides along the eccentric groove, thereby causing the swing component to drive the pharmaceutical mechanism to move up and down. The cam disk includes two slot blocks, each with a sliding groove. When the two slot blocks clamp the main shaft together, the two sliding grooves connect end to end to form the eccentric groove.

[0009] Optionally, the transmission assembly further comprises a clamping block, the clamping block is arranged on one of the groove blocks, and the two groove blocks clamp the main shaft rod together, so that the clamping block pushes the main shaft rod.

[0010] Optionally, a clamping groove is formed in one of the groove blocks, and the clamping block is located in the clamping groove.

[0011] Optionally, the swing member comprises a horizontal shaft, a swing rod and a plurality of supports, the supports are arranged on the frame body at intervals, the horizontal shaft is rotatably connected to the supports at both ends, the swing rod is sleeved on the horizontal shaft, one end of the swing rod is slidably arranged in the eccentric groove, and the other end of the swing rod is rotatably connected to the medicine dispensing mechanism.

[0012] Optionally, the swing rod comprises a rod body and a roller, the rod body is sleeved on the horizontal shaft, the roller is rotatably arranged on one end of the rod body, the roller is slidably arranged in the eccentric groove, and the other end of the rod body is rotatably connected to the medicine dispensing mechanism.

[0013] Optionally, the swing member further comprises a transmission rod, the transmission rod is arranged on the frame body, one end of the transmission rod is rotatably connected to the medicine dispensing mechanism, and the other end of the transmission rod is rotatably connected to the other end of the rod body away from the roller.

[0014] Optionally, the transmission rod comprises an adjusting tube and two sleeve pipes, one end of the sleeve pipes is sleeved with both ends of the adjusting tube, one end of one of the sleeve pipes away from the adjusting tube is rotatably connected to the medicine dispensing mechanism, and one end of the other sleeve pipe away from the adjusting tube is rotatably connected to the other end of the rod body away from the roller.

[0015] Optionally, the transmission assembly further comprises a scale disc, a pointer rod and a plurality of bearing seats, the bearing seats are arranged on the frame body at intervals, the main shaft rod is rotatably connected to the bearing seats at both ends, the scale disc is arranged on one end of the main shaft rod, and the pointer rod is arranged on the bearing seat close to one end of the scale disc.

[0016] Optionally, the bearing seat comprises a support plate and a locking plate, one end of the support plate is arranged on the frame body, the other end of the support plate is connected to the locking plate, the main shaft rod is arranged on the locking plate, and the pointer rod is arranged on the support plate.

[0017] Optionally, a U-shaped groove is formed in the support plate, the U-shaped groove is located at one end of the support plate close to the locking plate, and the main shaft rod is arranged in the U-shaped groove.

[0018] Compared with the prior art, the utility model has at least the following advantages:

[0019] The utility model discloses a pharmaceutical machine transmission mechanism splits the cam disc into two groove blocks, and the two groove blocks are clamped together to the main shaft rod through screw, so when the cam disc needs to be replaced due to damage, only the damaged cam disc needs to be disassembled, and the cam disc and other mechanical accessories do not need to be disassembled from the main shaft rod, so that the maintenance time of the pharmaceutical machine transmission mechanism and the adjustment time of transmission precision are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as the limitation to the scope, and for the ordinary skilled person in the art, under the premise of not paying the creative labor, other related drawings can also be obtained according to these drawings.

[0021] Figure 1 It is the front view cross section structure schematic drawing of the pharmaceutical machine transmission mechanism of the embodiment of the utility model;

[0022] Figure 2 It is the front view cross section structure schematic drawing of the pharmaceutical machine transmission mechanism of the embodiment of the utility model; Figure 1 It is the local structure schematic drawing of A;

[0023] Figure 3 It is the local top view cross section structure schematic drawing of the pharmaceutical machine transmission mechanism of the embodiment of the utility model;

[0024] Figure 4 It is the structure schematic drawing of the dial installation position of the embodiment of the utility model;

[0025] Figure 5 It is the structure schematic drawing of the installation position of the transmission rod of the embodiment of the utility model;

[0026] Figure 6 It is the structure schematic drawing of the swing rod and support connection of the embodiment of the utility model;

[0027] Figure 7 It is the structure schematic drawing of the cam disc of the embodiment of the utility model;

[0028] Figure 8 It is the structure schematic drawing of the cam disc splitting into two groove blocks of the embodiment of the utility model.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1、Pharmaceutical machine transmission mechanism;10、Frame;20、Transmission assembly;21、Driving piece;22、Main shaft rod;23、Swing piece;231、Cross shaft;232、Swing rod;233、Support;2321、Rod body;2322、Roller;234、Transmission rod;24、Cam disc;241、Eccentric groove;242、Groove block;2421、Slide groove;25、Clamping block;2422、Clamping groove;26、Dial;27、Pointer rod;28、Bearing seat;271、Support plate;272、Locking plate. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings.

[0032] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second", "third" and the like are only used for the purpose of description and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0034] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] As Figures 1 to 3 , Figures 7 to 8As shown, in one embodiment, a pharmaceutical machine transmission mechanism 1 is used to drive a pharmaceutical machine, including a frame 10 and a transmission assembly 20. The transmission assembly 20 includes a driving component 21, a main shaft 22, a swinging component 23, and a cam disk 24. The driving component 21 is mounted on the frame 10, the main shaft 22 is rotatably mounted on the frame 10, and one end of the main shaft 22 is connected to the output shaft of the driving component 21. The cam disk 24 is coaxially mounted on the main shaft 22, and an eccentric groove 241 is provided on the cam disk 24. The swinging component 23 is rotatably mounted on the frame 10. One end of the moving member 23 is slidably connected to the slide groove 2421, and the other end of the swing member 23 is rotatably connected to the pharmaceutical mechanism. When the driving member 21 drives the main shaft 22 to rotate, one end of the swing member 23 slides along the slide groove 2421, thereby causing the swing member 23 to drive the pharmaceutical mechanism to slide up and down. The cam disk 24 includes two slot blocks 242, and each of the two slot blocks 242 is provided with a slide groove 2421. When the two slot blocks 242 clamp the main shaft 22 together, the two slide grooves 2421 are connected end to end to form an eccentric groove 241.

[0036] It should be noted that a pharmaceutical manufacturing facility is an institution that produces pharmaceuticals using pharmaceutical machinery. For example, a pharmaceutical manufacturing facility includes capsule dispensing mechanisms, capsule locking mechanisms, granule / powder filling mechanisms, etc. Pharmaceutical manufacturing facilities are not within the scope of protection of this application, so they will not be elaborated here.

[0037] It should be noted that the pharmaceutical manufacturing mechanism is located on top of the frame 10. Two support plates 271 are provided, both mounted on the frame 10 and positioned below the pharmaceutical manufacturing mechanism. Each support plate 271 has a U-shaped groove at its end furthest from the frame 10, and both ends of the main shaft 22 are located within these U-shaped grooves. Furthermore, two locking plates 272 are provided, both coaxially fitted onto the main shaft 22. Each locking plate 272 is fixedly connected to the end of the two support plates 271 closest to the U-shaped groove, allowing the main shaft 22 to rotate relative to the frame 10.

[0038] As shown in the figure, in one embodiment, one end of the main spindle 22 is connected to the output shaft of the drive member 21.

[0039] It should be noted that a sprocket is provided on the main shaft 22, and a sprocket is provided on the output shaft of the drive component 21. Both sprockets are connected by a chain, enabling the drive component 21 to drive the main shaft 22 to rotate. For example, the sprockets provided on the main shaft 22 and the drive component 21 can also be pulleys, driven by a belt, or they can be gears, with two gears meshing together for transmission.

[0040] like Figure 7 As shown, in one embodiment, the cam disk 24 is coaxially disposed on the main shaft 22, and an eccentric groove 241 is provided on the cam disk 24.

[0041] It should be noted that the cam plate 24 is combined by two semicircular annular groove blocks 242. Due to the semicircular annular shape of the two groove blocks 242, each of the two groove blocks 242 has a semicircular groove on one side surface. When the two semicircular grooves are combined together, a through hole is formed in the cam plate 24. In this way, the two groove blocks 242 can jointly surround the main shaft rod 22. Further, the two groove blocks 242 are consistent in size and shape, and each of the two groove blocks 242 is provided with a sliding groove 2421, and the two sliding grooves 2421 are inconsistent in direction, but the width and depth of the two sliding grooves 2421 are consistent. When the two groove blocks 242 are combined, the two sliding grooves 2421 are connected in series to jointly form an eccentric groove 241 in a closed loop. Further, the two groove blocks 242 are each provided with a boss, and the two bosses are semicircular annular structures. One of the bosses is provided with two screw holes, and the two screw holes are respectively located on the two sides of the groove. The other boss is provided with two screw grooves, and the two screw grooves are respectively aligned with the two screw holes. In this way, when the two groove blocks 242 jointly surround the main shaft rod 22, the two groove blocks 242 can be clamped together by screwing the screws to clamp the main shaft rod 22, so that the main shaft rod 22 can drive the two groove blocks 242 to rotate, thereby enabling the eccentric groove 241 on the cam plate to rotate. Further, when the sliding grooves 2421 on the two groove blocks 242 are worn and the transmission accuracy is insufficient, the two groove blocks 242 can be disassembled from the main shaft rod 22 by screwing the screws, so as to be replaced or repaired.

[0042] As shown in Figures 1 to 2 In an embodiment, the transmission assembly 20 further includes a clamping block 25, which is arranged on one of the two groove blocks 242. When the two groove blocks 242 jointly clamp the main shaft rod 22, the clamping block 25 pushes the main shaft rod 22.

[0043] It should be noted that, in order to facilitate the description, the two groove blocks 242 are defined as a first groove block 242 and a second groove block 242, the screw hole is provided on the boss of the first groove block 242, the screw groove is provided on the boss of the second groove block 242, and two clamping grooves 2422 are provided on the second groove block 242. The two clamping grooves 2422 are both located on one side of the second groove block 242 clamping the main shaft rod 22, and both of them are provided along the axial direction of the second groove block 242. And the clamping groove 2422 extends from one side of the second groove block 242 to the side of the boss. Further, two locking holes are provided on the boss of the second groove block 242, and the two locking holes respectively extend from the side of the boss away from the clamping groove 2422 to the two clamping grooves 2422. Further, two clamping blocks 25 are provided, and the two clamping blocks 25 are respectively located in the two clamping grooves 2422. When the two groove blocks 242 jointly clamp the main shaft rod 22, two screws are respectively used to pass through the locking holes to push the two clamping blocks 25, so that the two clamping blocks 25 push the main shaft rod 22. Since the two clamping grooves 2422 are provided along the axial direction of the second groove block 242, when the second groove block 242 and the first groove block 242 jointly clamp the main shaft rod 22, the two clamping grooves 2422 will also be directed towards the axial direction of the main shaft rod 22. So that the two screws can push the two clamping blocks 25 located in the two clamping grooves 2422 to push the main shaft rod 22 along the axial direction of the main shaft rod 22. Further, the two clamping blocks 25 are long strip structures, and one side of the two clamping blocks 25 is a curved surface structure. The curvature of the curved surface structure is consistent with the curvature of the surface of the main shaft rod 22, and the curved surfaces of the two clamping blocks 25 are both directed towards the main shaft rod 22, so that the two clamping blocks 25 can have a larger area in contact with the main shaft rod 22. Further, when the two groove blocks 242 jointly clamp the main shaft rod 22, the eccentric groove 241 is located on the side of the cam disc 24, and after a long time of transmission of the eccentric groove 241 and the swing piece 23, the cam disc 24 is prone to be offset to the two ends of the main shaft rod 22. Therefore, by tightening the two screws on the second groove block 242, the two clamping blocks 25 are jointly clamped along the axial direction of the main shaft rod 22, so as to avoid the left or right offset of the cam disc 24.

[0044] As Figures 3 to 6 shown, in an embodiment, the swing piece 23 includes a horizontal shaft 231, a swing rod 232, and a plurality of supports 233. The supports 233 are spaced apart and arranged on the frame 10. The two ends of the horizontal shaft 231 are respectively rotatably connected with the supports 233. The swing rod 232 is sleeved on the horizontal shaft 231. One end of the swing rod 232 is located in the sliding groove 2421, and the other end of the swing rod 232 is rotatably connected with the pharmaceutical mechanism.

[0045] It is to be noted that the middle part of the swing lever 232 is sleeved on the horizontal shaft 231, so that when one end of the swing lever 232 swings downward around the horizontal shaft 231, the other end of the swing lever 232 is driven to swing upward, for example, the swing lever 232 tends to the balance structure. For example, one end of the swing lever 232 is rotatably arranged on the horizontal shaft 231, the other end of the swing lever 232 is rotatably connected with the transmission rod 234, and the middle part of the swing lever 232 slides in the eccentric groove 241. Further, the swing lever 232 comprises a lever body 2321 and a roller 2322, the middle part of the lever body 2321 is sleeved on the horizontal shaft 231, the roller 2322 is rotatably arranged on one end of the lever body 2321, and the roller 2322 slides in the eccentric groove 241, and the other end of the lever body 2321 away from the roller 2322 is rotatably connected with the transmission rod 234. For another example, one end of the lever body 2321 is rotatably arranged on the horizontal shaft 231, the other end of the lever body 2321 is rotatably connected with the transmission rod 234, the roller 2322 is rotatably arranged on the middle part of the lever body 2321, and the roller 2322 slides in the eccentric groove 241, so that when the eccentric groove 241 on the cam disc 24 is driven to rotate by the main shaft rod 22, the roller 2322 drives one end of the swing lever 232 to reciprocatingly swing, thereby driving the other end of the swing lever 232 to drive the medicine preparation mechanism to reciprocatingly slide up and down.

[0046] As shown in FIG. 1, Figures 4 to 6 In an embodiment, the swing member 23 further comprises a transmission rod 234, the transmission rod 234 penetrates through the frame 10, one end of the transmission rod 234 is rotatably connected with the medicine preparation mechanism, and the other end of the transmission rod 234 is rotatably connected with the other end of the lever body 2321 away from the roller 2322.

[0047] It is to be noted that the transmission rod 234 comprises an adjusting tube and two sleeves, a nut is arranged at the middle part of the adjusting tube, and external threads are arranged at both ends of the adjusting tube, and internal threads are arranged at one end of each of the two sleeves, and the internal threads of the two sleeves are screwed with the external threads of both ends of the adjusting tube, one end of one of the sleeves is rotatably connected with the medicine preparation mechanism, and the other end of the other sleeve is rotatably connected with the other end of the lever body 2321 away from the roller 2322. In this way, the transmission distance between the lever body 2321 and the medicine preparation mechanism is adjustable.

[0048] As shown in FIG. 1, Figures 1 to 4 In an embodiment, the transmission assembly 20 further comprises a dial 26, a pointer rod 27, and a plurality of bearing seats 28, each of the bearing seats 28 is arranged on the frame 10 at intervals, both ends of the main shaft rod 22 are rotatably connected with each of the bearing seats 28, the dial 26 is arranged on one end of the main shaft rod 22, and the pointer rod 27 is arranged on the bearing seat 28 close to one end of the dial 26.

[0049] It needs to be explained that the dial 26 is arranged at the end of the main shaft 22, and the dial 26 is parallel to the cam disc 24, since the main shaft 22 can rotate relative to the two support plates 271, when the main shaft 22 drives the cam disc 24 to rotate, it synchronously drives the dial 26 to rotate. Further, the pointer rod 27 is arranged on the support plate 271 close to one end of the dial 26, so that the pointer rod 27 can indicate the scale on the dial 26, thereby the pharmaceutical machine transmission mechanism 1 of the present application can accurately adjust the transmission precision after maintenance.

[0050] As shown in Figures 1 to 3 In an embodiment, the cam disc 24, the swing rod 232 and the transmission rod 234 are all provided with several each, each cam disc 24 is combined by two groove blocks 242, and the cam disc 24 is located on the main shaft 22, and the eccentric groove 241 is arranged on each cam disc 24. Further, each swing rod 232 is rotationally arranged on the horizontal shaft 231, one end of each swing rod 232 is slidingly arranged in each eccentric groove 241, and the other end of each swing rod 232 is rotationally connected with each transmission rod 234. It needs to be noted that the eccentric distances of each eccentric groove 241 on each cam disc 24 are inconsistent, so that the swing distances of each transmission rod 234 driven by each swing rod 232 are inconsistent, further, the end of each transmission rod 234 away from each swing rod 232 is connected with the pharmaceutical mechanism, since the eccentric distances of each eccentric groove 241 are inconsistent, the pharmaceutical mechanism can complete various actions in the production of medicines.

[0051] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A transmission mechanism for a pharmaceutical machine for driving a pharmaceutical mechanism, characterized in that, Include: Frame body; And Transmission assembly, the transmission assembly includes drive, main shaft rod, swing piece and cam disc, the drive is arranged on the frame body, the main shaft rod is rotationally arranged on the frame body, one end of the main shaft rod is connected with the output shaft of the drive, the cam disc is coaxially arranged on the main shaft rod, the cam disc is provided with eccentric slot, the swing piece is rotationally arranged on the frame body, one end of the swing piece is slidably connected with the eccentric slot, the other end of the swing piece is rotationally connected with the pharmaceutical mechanism, the drive is used to drive the main shaft rod to rotate, so that one end of the swing piece slides along the eccentric slot, and then the swing piece drives the pharmaceutical mechanism to slide up and down, the cam disc includes two groove blocks, two groove blocks are provided with sliding groove, two groove blocks are used to clamp the main shaft rod, so that two sliding grooves are connected to form the eccentric slot.

2. The transmission mechanism of the pharmaceutical machine according to claim 1, characterized in that, The transmission assembly further includes a clamping block, the clamping block is arranged on one of the groove blocks, and the two groove blocks are used to clamp the main shaft rod, so that the clamping block pushes the main shaft rod.

3. The drive mechanism of claim 2, wherein, One of the groove blocks is provided with a clamping groove, and the clamping block is located in the clamping groove.

4. The drive mechanism of claim 1, wherein, The swing piece includes a horizontal shaft, a swing rod and a plurality of supports, the supports are arranged on the frame body at intervals, the horizontal shaft is rotatably connected with each support at both ends, the swing rod is sleeved on the horizontal shaft, one end of the swing rod is slidably arranged in the eccentric slot, and the other end of the swing rod is rotatably connected with the pharmaceutical mechanism.

5. The drive mechanism of claim 4, wherein, The swing rod includes a rod body and a roller, the rod body is sleeved on the horizontal shaft, the roller is rotatably arranged on one end of the rod body, and the roller is slidably arranged in the eccentric slot, and the other end of the rod body away from the roller is rotatably connected with the pharmaceutical mechanism.

6. The drive mechanism of claim 5, wherein, The swing piece further includes a transmission rod, the transmission rod is arranged on the frame body, one end of the transmission rod is rotatably connected with the pharmaceutical mechanism, and the other end of the transmission rod is rotatably connected with the other end of the rod body away from the roller.

7. The drive mechanism of claim 6, wherein, The transmission rod includes an adjusting tube and two sleeve pipes, one end of each of the sleeve pipes is sleeved with both ends of the adjusting tube, one end of one of the sleeve pipes away from the adjusting tube is rotatably connected with the pharmaceutical mechanism, and one end of the other sleeve pipe away from the adjusting tube is rotatably connected with the other end of the rod body away from the roller.

8. The drive mechanism of claim 1, wherein, The transmission assembly further includes a scale disc, a pointer rod and a plurality of bearing seats, the bearing seats are arranged on the frame body at intervals, both ends of the main shaft rod are rotatably connected with each bearing seat, the scale disc is arranged on one end of the main shaft rod, and the pointer rod is arranged on the bearing seat close to one end of the scale disc.

9. The drive mechanism of claim 8, wherein, The bearing seat includes a support plate and a lock plate, one end of the support plate is arranged on the frame body, the other end of the support plate is connected with the lock plate, the main shaft rod is arranged on the lock plate, and the pointer rod is arranged on the support plate.

10. The drive mechanism of claim 9, wherein, The support plate is provided with a U-shaped groove, the U-shaped groove is located at one end of the support plate close to the lock plate, and the main shaft rod is accommodated in the U-shaped groove.

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