A zero setting device

Abstract

The application discloses a zero setting device, and relates to the technical field of servo systems. The zero setting device has a first direction, and comprises a base, a fixed seat fixedly installed on the base, a moving seat slidably installed on the base along the first direction, a plurality of groups of adapter assemblies selectively and detachably installed on one side of the moving seat away from the base, and a driving mechanism installed on the base and in transmission connection with the moving seat. The zero setting device can fix a to-be-detected piece and facilitate zero setting operation on the to-be-detected piece.

Description

Technical Field

[0001] This application relates to the field of servo technology, and in particular to a zeroing device. Background Technology

[0002] Linear servos are widely used in humanoid robots, enabling them to perform movements with corresponding degrees of freedom.

[0003] In related technologies, zeroing linear servos mainly relies on manual operation. Only through repeated calibration and measurement by operators can the final zeroing be achieved. However, during this process, the linear servo is constantly in a non-fixed state, making manual zeroing inconvenient and inefficient. Therefore, there is an urgent need for a zeroing device that can fix the linear servo in place and facilitate operation during the zeroing process. Utility Model Content

[0004] This application provides a zeroing device for fixing the part to be tested, which facilitates the zeroing operation of the part to be tested.

[0005] This application provides a zeroing device, the zeroing device having a first direction, the zeroing device comprising: Base; The mounting bracket is fixedly installed on the base. A movable seat is slidably mounted on the base along the first direction; Multiple adapter components, one of which can be detachably installed on the side of the movable seat opposite to the base; The drive mechanism is mounted on the base and is connected to the movable seat in a transmission manner.

[0006] In some possible implementations, the drive mechanism includes a drive member and a transmission rod, the drive member being mounted on the end of the base away from the fixed seat; The transmission rod is connected between the driving component and the movable seat.

[0007] In some possible implementations, the transmission rod includes a lead screw parallel to the first direction, the lead screw being rotatably mounted on the base and being connected to the drive component in a transmission manner; The drive mechanism also includes a lead screw nut, which is sleeved on the lead screw and threadedly connected to the lead screw. The lead screw nut is fixedly connected to the movable seat.

[0008] In some possible implementations, the drive element includes a handwheel that is fixedly connected to one end of the drive rod.

[0009] In some possible implementations, the zeroing device further includes a second direction perpendicular to the first direction, and the fixing base includes a fixing base body and a first connecting shaft, wherein the fixing base body is fixedly mounted on the base; The first connecting shaft is mounted on the end of the fixed base body away from the base, the first connecting shaft is parallel to the second direction, and the first connecting shaft is configured to be coaxially connected to one end of the test piece.

[0010] In some possible implementations, the adapter assembly includes a first adapter base and a second connecting shaft, wherein the first adapter base is detachably mounted on the side of the movable seat opposite to the base. The second connecting shaft is mounted on the end of the first adapter away from the movable base. The second connecting shaft is parallel to the first connecting shaft and is configured to be coaxially connected to the end of the test piece away from the first connecting shaft.

[0011] In some possible implementations, the zeroing device further includes a third direction perpendicular to the first direction and the second direction, and the adapter assembly includes a second adapter seat and a third connecting shaft, wherein the second adapter seat is detachably mounted on the side of the movable seat opposite to the base. The third connecting shaft is mounted on the end of the second adapter away from the movable seat. The third connecting shaft is parallel to the third direction and is configured to be coaxially connected to the end of the test piece away from the first connecting shaft.

[0012] In some possible implementations, the zeroing device further includes a limiting mechanism disposed on the side of the movable seat facing the fixed seat; The limiting mechanism includes a mounting base, a limiting member, and a locking assembly. The mounting base is fixedly connected to the base, the limiting member is connected to the mounting base and is telescopically arranged along the first direction relative to the side of the mounting base facing the movable seat, and the locking assembly is connected between the mounting base and the limiting member to lock the limiting member to the mounting base.

[0013] In some possible implementations, the base is provided with a guide groove extending along the first direction, and the movable seat is provided with a guide protrusion protruding from one side facing the base, the guide protrusion being slidably disposed in the guide groove; The limiting mechanism is housed in the guide groove, and the limiting member is located on the moving path of the guide protrusion.

[0014] In some possible implementations, the base is further provided with a scale arranged along the first direction, and the movable seat has marking lines on the side facing the scale.

[0015] The beneficial effects of this application are as follows: In the zeroing device provided by this application, one of multiple adapter components can be detachably installed on the movable base. Therefore, the adapter component can be replaced and adjusted according to the phase difference between the second and first fisheye bearings in the workpiece to be tested, so that the adapter component is compatible with the second fisheye bearing. This allows the second fisheye bearing to be smoothly connected to the adapter component, facilitating the fixation of the workpiece to be tested by the zeroing device for zeroing operations, thus improving the efficiency of the zeroing operation. Furthermore, the zeroing device provided by this application is applicable to zeroing operations on workpieces in different states (i.e., the phase difference between the first and second fisheye bearings is different), thus having a wider range of applications and higher versatility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of the zeroing device in some embodiments is shown; Figure 2 A cross-sectional structural schematic diagram of the zeroing device in some embodiments is shown; Figure 3 A side view of the zeroing device is shown in some embodiments; Figure 4 It shows Figure 3 A schematic diagram of the cross-sectional structure along the AA direction; Figure 5 It shows Figure 3 A schematic diagram of the cross-sectional structure along the BB direction; Figure 6 A three-dimensional structural schematic diagram of the zeroing device in use is shown in some embodiments; Figure 7 Another three-dimensional structural schematic diagram of the zeroing device in some embodiments is shown; Figure 8 Another cross-sectional structural schematic diagram of the zeroing device in some embodiments is shown; Figure 9 Another three-dimensional structural schematic diagram of the zeroing device in use in some embodiments is shown.

[0018] Explanation of key component symbols: 1000-Standard Zero Device; 110 - Base; 111 - Guide groove; 121 - First fixing block; 122 - Second fixing block; 200-Fixed base; 210-Fixed base body; 211-First connecting ear; 220-First connecting shaft; 231-First handle; 232-First internal hex screw; 310 - Movable seat; 311 - Guide protrusion; 312 - Marking line; 320 - Limiting plate; 400 - Adapter assembly; 410 - First adapter base; 411 - Second connecting lug; 4111 - Limiting step; 420 - Second connecting shaft; 430 - Second adapter base; 431 - Clearance hole; 440 - Third connecting shaft; 451 - Second handle; 452 - Second hex socket screw; 500-Drive mechanism; 510-Drive component; 511-Handwheel; 520-Transmission rod; 521-Lead screw; 530-Lead screw nut; 600 - Limiting mechanism; 610 - Mounting base; 620 - Limiting component; 621 - Waist-shaped hole; 700-scale; 2000 - Item to be inspected; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] like Figure 1 and Figure 6 As shown, the embodiment provides a zeroing device 1000, which can be used to zero-calibrate a component 2000 to be tested. The component 2000 to be tested can be a linear servo.

[0025] like Figure 1 , Figure 6 and Figure 7As shown, in some embodiments, the zeroing device 1000 may have a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. The zeroing device 1000 may include a base 110, a fixed base 200, a movable base 310, a drive mechanism 500, and multiple sets of adapter components 400. The fixed base 200 may be fixedly mounted on one end of the base 110 along the first direction X, i.e., the fixed base 200 remains fixed relative to the base 110. The movable base 310 may be slidably mounted on the base 110 along the first direction X. The drive mechanism 500 may be mounted on the base 110 and is drively connected to the movable base 310. Thus, the drive mechanism 500 can drive the movable base 310 to move along the first direction X to move closer to or further away from the fixed base 200. One of the multiple sets of adapter components 400 may be detachably mounted on the side of the movable base 310 opposite to the base 110, i.e., the movable base 310 is connected to one set of adapter components 400, and the adapter components 400 may be replaced.

[0026] When zeroing the test piece 2000, one end of the test piece 2000 can be connected to the fixed base 200, and the other end can be connected to the adapter assembly 400. Specifically, the first fisheye bearing at one end of the linear servo's main body structure can be connected to the fixed base 200, and the second fisheye bearing at one end of the linear servo's output shaft can be connected to the adapter assembly 400, thus achieving a fixed installation of the linear servo. Afterwards, the drive mechanism 500 can drive the moving base 310 to move along the first direction X, and the adapter assembly 400 can drive the output shaft of the linear servo to extend and retract, thereby achieving zeroing of the linear servo. The adapter assembly 400 can be changed and adjusted according to the phase difference between the second fisheye bearing and the first fisheye bearing, so that the second fisheye bearing can be smoothly connected to the adapter assembly 400. This facilitates the fixed installation of the test piece 2000 in different states, enabling zeroing operations on the test piece 2000 and improving the zeroing efficiency of the test piece 2000. Meanwhile, the zeroing device 1000 provided in the embodiment can be applied to the zeroing operation of the test piece 2000 in different states, with a wider range of applications and higher versatility.

[0027] like Figure 1 and Figure 2 As shown, in some embodiments, the base 110 may generally be a rectangular plate-like structure extending along a first direction X. A second direction Y may be parallel to the base 110, and a third direction Z may be perpendicular to the base 110. The drive mechanism 500 may include a drive member 510 and a transmission rod 520. The drive member 510 may be disposed at the end of the base 110 away from the fixed seat 200, and the transmission rod 520 may be driveably connected between the drive member 510 and the movable seat 310. Thus, power transmission between the drive member 510 and the movable seat 310 can be achieved by the transmission rod 520.

[0028] In some embodiments, the transmission rod 520 may be a lead screw 521, and the lead screw 521 may be parallel to the first direction X. In the embodiment, a first fixing block 121 and a second fixing block 122 are fixedly connected to one side of the base 110 by means of snap-fit, bolt connection, etc. The first fixing block 121 and the second fixing block 122 are spaced apart along the first direction X. The second fixing block 122 is located on the side of the first fixing block 121 away from the fixing seat 200, and may be located near the end of the base 110 away from the fixing seat 200. Both ends of the transmission rod 520 may be rotatably connected to the first fixing block 121 and the second fixing block 122 one-to-one by bearings. Accordingly, the transmission rod 520 may rotate relative to the base 110. In addition, the end of the transmission rod 520 away from the fixing seat 200 may protrude relative to the side of the second fixing block 122 away from the first fixing block 121.

[0029] In some embodiments, the drive member 510 may be a handwheel 511. The handwheel 511 may be fixedly connected to the end of the transmission rod 520 that protrudes relative to the second fixed block 122. During zeroing, the operator can drive the transmission rod 520 to rotate by turning the handwheel 511.

[0030] In some embodiments, the drive mechanism 500 further includes a lead screw nut 530, which can be inserted into the movable seat 310 and fixedly connected to the movable seat 310 by bolts, snap-fit, or other means. A lead screw 521 can be inserted into the lead screw nut 530 and threadedly connected to the lead screw nut 530. When the lead screw 521 rotates, it can drive the lead screw nut 530 to move along the first direction X, thereby driving the movable seat 310 to move along the first direction X.

[0031] In other embodiments, the drive unit 510 may also be a motor, and the output shaft of the motor may be connected to the lead screw 521 via a coupling or other structure.

[0032] In other embodiments, the drive mechanism 500 may also be a cylinder, hydraulic cylinder, electric push rod, or other similar structure. The output shaft of the drive mechanism 500 may be fixedly connected to the movable seat 310 to drive the movable seat 310 to move along the first direction X.

[0033] like Figures 2 to 4 As shown, in some embodiments, the fixing base 200 may include a fixing base body 210 and a first connecting shaft 220. One end of the fixing base body 210 may be fixedly connected to the base 110 by means of bolts, snap-fit, adhesive, or welding, and is located at the end of the base 110 away from the second fixing block 122. Two first connecting ears 211 are provided at the end of the fixing base body 210 away from the base 110, and the two first connecting ears 211 are arranged opposite each other at a distance along the second direction Y. The first connecting shaft 220 may pass through the two first connecting ears 211 along the second direction Y, and correspondingly, the first connecting shaft 220 may be parallel to the second direction Y.

[0034] In some embodiments, one end of the first connecting shaft 220 is fixedly connected to a first handle 231 by means of riveting, interference fit, etc., and the head of the first handle 231 is limited to the side of one of the first connecting ears 211 opposite to the other first connecting ear 211. A first hexagon socket screw 232 is screwed onto the end of the first connecting shaft 220 away from the first handle 231, and the head of the first hexagon socket screw 232 is limited to the side of the other first connecting ear 211 opposite to the first handle 231. When zeroing the test piece 2000, the first hexagon socket screw 232 can be separated from the first connecting shaft 220, allowing the first connecting shaft 220 to detach from the first connecting ear 211, so that the end of the test piece 2000 equipped with the first fisheye bearing can be placed between the two first connecting ears 211. Then, the first connecting shaft 220 can be passed through the two first connecting ears 211 and the first fisheye bearing, and locked by the first hexagon socket screw 232, thus connecting the test piece 2000 to the fixing base 200.

[0035] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments, the adapter assembly 400 may include a first adapter base 410 and a second connecting shaft 420. One end of the first adapter base 410 is detachably mounted to the side of the movable base 310 opposite to the base 110 by means of screws or snap-fit. Two second connecting ears 411 are disposed on the side of the first adapter base 410 opposite to the movable base 310, and the two second connecting ears 411 are spaced apart from each other along the second direction Y. The second connecting shaft 420 can pass through the two second connecting ears 411 along the second direction Y, and correspondingly, the second connecting shaft 420 can be parallel to the second direction Y.

[0036] In some embodiments, one end of the second connecting shaft 420 may be screwed with a second hexagon socket screw 452, the head of which is confined to the side of a second connecting lug 411 opposite to the other second connecting lug 411. The other end of the second connecting shaft 420 may protrude relative to the side of the other second connecting lug 411 opposite to the second hexagon socket screw 452. Additionally, a limiting step 4111 opposite to the second hexagon socket screw 452 may be disposed within the second connecting lug 411 near the second connecting lug 452. The limiting step 4111 may be opposite to the second connecting shaft 420 and may restrict the axial movement of the second connecting shaft 420.

[0037] When zeroing the test piece 2000, the second hex socket screw 452 can be separated from the second connecting shaft 420, allowing the second connecting shaft 420 to detach from the second connecting lug 411. This allows the end of the test piece 2000 equipped with the second spherical bearing to be placed between the two second connecting lugs 411. Then, the second connecting shaft 420 can be passed through the two second connecting lugs 411 and the second spherical bearing, and the connection can be locked using the second hex socket screw 452, thus connecting the test piece 2000 to the first adapter 410.

[0038] like Figures 7 to 9 As shown, in some embodiments, the adapter assembly 400 further includes a second adapter seat 430 and a third connecting shaft 440. The second adapter seat 430 is detachably connected to the side of the movable seat 310 opposite to the base 110 by means of screws or snap-fit. A clearance hole 431 extending in a first direction X is provided at the end of the second adapter seat 430 away from the movable seat 310. The third connecting shaft 440 is inserted into the second adapter seat 430 from the side of the second adapter seat 430 opposite to the movable seat 310 along a third direction Z and passes through the clearance hole 431. A second handle 451 is fixedly connected to the end of the third connecting shaft 440 away from the movable seat 310 by means of interference fit or riveting. The end of the third connecting shaft 440 away from the second handle 451 can be threaded or plugged into the second adapter seat 430.

[0039] When zeroing the test piece 2000, the third connecting shaft 440 can be rotated via the second handle 451 to disengage it from the clearance hole 431, allowing the end of the test piece 2000 equipped with the second fisheye bearing to be inserted into the clearance hole 431. Then, by turning the second handle 451, the third connecting shaft 440 can be threaded through the second fisheye bearing and threadedly connected to or inserted into the second adapter seat 430. Correspondingly, the third connecting shaft 440 can be coaxially connected to the end of the test piece 2000 furthest from the first connecting shaft 220, thus connecting the test piece 2000 to the second adapter seat 430.

[0040] like Figure 6 and Figure 9 As shown in the embodiment, when the second fisheye bearing is in phase with the first fisheye bearing, that is, when the axial direction of the second fisheye bearing is parallel to the axial direction of the first fisheye bearing, the first adapter 410 can be mounted on the movable base 310 and connected to the end of the component 2000 to be tested where the second fisheye bearing is located. When the second fisheye bearing has a phase angle with the first fisheye bearing, for example, when the axial direction of the second fisheye bearing is perpendicular to the axial direction of the first fisheye bearing, the second adapter 430 can be mounted on the movable base 310 and connected to the end of the component 2000 to be tested where the second fisheye bearing is located.

[0041] In other embodiments, the adapter assembly 400 may further include a third adapter and a third connecting shaft. The third adapter is detachably connected to the movable seat 310, and the third connecting shaft is connected to the end of the third adapter away from the movable seat 310. The third connecting shaft is not parallel to the first direction X, the second direction Y, and the third direction Z.

[0042] like Figures 1 to 3 As shown, in some embodiments, the base 110 is further provided with a guide groove 111 extending along the first direction X. A guide protrusion 311 protrudes from one end of the movable seat 310 facing the base 110, and the guide protrusion 311 is slidably disposed in the guide groove 111. Furthermore, a limiting plate 320 can be fixedly connected to the side of the guide protrusion 311 away from the adapter assembly 400 by means of screws or other methods. The limiting plate 320 can be positioned on the side of the base 110 away from the adapter assembly 400. Therefore, the movable seat 310 can be prevented from arbitrarily detaching from the base 110 along the third direction Z, thus preventing the movable seat 310 from arbitrarily separating from the base 110.

[0043] In some embodiments, the zeroing device 1000 further includes a limiting mechanism 600, which may be disposed on the side of the movable seat 310 facing the fixed seat 200. In some embodiments, the limiting mechanism 600 may be accommodated in the guide groove 111 and located on the movement path of the movable seat 310.

[0044] In some embodiments, the limiting mechanism 600 may include a mounting base 610 and a limiting member 620. The mounting base 610 may be fixedly disposed relative to the base 110, for example, the mounting base 610 may be fixedly connected to the base 110 by means of bolts or the like. The mounting base 610 may be located at one end of the guide groove 111 near the fixed base 200. The limiting member 620 may be connected to the mounting base 610 and may be telescopically disposed along the first direction X relative to the side of the mounting base 610 toward the movable base 310, that is, the position of the limiting member 620 relative to the mounting base 610 in the first direction X is adjustable.

[0045] In some embodiments, the limiting member 620 has an oblong hole 621 parallel to the first direction X. The limiting mechanism 600 also includes a locking assembly (not shown), which may include a bolt. The bolt passes through the oblong hole 621 and is screwed to the mounting base 610. The head of the bolt can be limited to abut against the side of the limiting member 620 away from the mounting base 610. Thus, a lock can be achieved between the limiting member 620 and the mounting base 610, preventing the limiting member 620 from wobbling relative to the mounting base 610. When it is necessary to adjust the position of the limiting member 620 in the first direction X, the bolt can be loosened to separate the head of the bolt from the limiting member 620, releasing the lock on the limiting member 620. Thus, the limiting member 620 can be moved along the first direction X to adjust its position.

[0046] In other embodiments, the limiting member 620 and the mounting base 610 can also be locked together by the cooperation of bolts and nuts.

[0047] In some embodiments, a scale 700 is also disposed on the side of the base 110. Specifically, the scale 700 may be located on one side of the guide groove 111. In the embodiments, the scale 700 may extend along the first direction X, and the scale number of the scale 700 may gradually increase from the end near the fixed base 200 to the end away from the fixed base 200. The side of the movable base 310 facing the scale 700 may be provided with marking lines 312, which can facilitate accurate reading of the position of the movable base 310 in the first direction X.

[0048] like Figures 1 to 9 As shown, during the zeroing process, a suitable adapter (including a first adapter 410 and a second adapter 430) can be selected based on the phase difference between the second and first fisheye bearings to mount the workpiece 2000 to be tested onto the zeroing device 1000. Additionally, based on the center distance requirement between the first and second fisheye bearings of the workpiece 2000, the position of the limiting member 620 in the first direction X can be adjusted, and the limiting member 620 can be locked to the mounting base 610 using a locking assembly. Afterwards, the moving base 310 can be driven by the drive mechanism 500 to move along the first direction X until the moving base 310 abuts against the limiting member 620, thus achieving zeroing of the workpiece 2000 and enabling batch zeroing of multiple workpieces 2000, improving the zeroing efficiency of multiple workpieces 2000.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A zeroing device, characterized in that, The zeroing device has a first direction, and the zeroing device includes: Base; The mounting bracket is fixedly installed on the base. A movable seat is slidably mounted on the base along the first direction; Multiple adapter components, one of which can be detachably installed on the side of the movable seat opposite to the base; The drive mechanism is mounted on the base and is connected to the movable seat in a transmission manner.

2. The zero-calibration device according to claim 1, characterized in that, The driving mechanism includes a driving component and a transmission rod, and the driving component is mounted on the end of the base away from the fixed seat; The transmission rod is connected between the driving component and the movable seat.

3. The zero-calibration device according to claim 2, characterized in that, The transmission rod includes a lead screw, which is parallel to the first direction. The lead screw is rotatably mounted on the base and is connected to the driving component in a transmission manner. The drive mechanism also includes a lead screw nut, which is sleeved on the lead screw and threadedly connected to the lead screw. The lead screw nut is fixedly connected to the movable seat.

4. The zero-calibration device according to claim 2 or 3, characterized in that, The driving component includes a handwheel, which is fixedly connected to one end of the transmission rod.

5. The zero-calibration device according to claim 1, characterized in that, The zeroing device also includes a second direction perpendicular to the first direction, and the fixing base includes a fixing base body and a first connecting shaft, with the fixing base body fixedly installed on the base; The first connecting shaft is mounted on the end of the fixed base body away from the base, the first connecting shaft is parallel to the second direction, and the first connecting shaft is configured to be coaxially connected to one end of the test piece.

6. The zeroing device according to claim 5, characterized in that, The adapter assembly includes a first adapter seat and a second connecting shaft, wherein the first adapter seat is detachably installed on the side of the movable seat opposite to the base. The second connecting shaft is mounted on the end of the first adapter away from the movable base. The second connecting shaft is parallel to the first connecting shaft and is configured to be coaxially connected to the end of the test piece away from the first connecting shaft.

7. The zero-calibration device according to claim 5, characterized in that, The zeroing device also includes a third direction perpendicular to the first direction and the second direction. The adapter assembly includes a second adapter seat and a third connecting shaft. The second adapter seat is detachably installed on the side of the movable seat away from the base. The third connecting shaft is mounted on the end of the second adapter away from the movable seat. The third connecting shaft is parallel to the third direction and is configured to be coaxially connected to the end of the test piece away from the first connecting shaft.

8. The zero-calibration device according to claim 1, characterized in that, The zeroing device also includes a limiting mechanism, which is disposed on the side of the movable seat facing the fixed seat; The limiting mechanism includes a mounting base, a limiting member, and a locking assembly. The mounting base is fixedly connected to the base, the limiting member is connected to the mounting base and is telescopically arranged along the first direction relative to the side of the mounting base facing the movable seat, and the locking assembly is connected between the mounting base and the limiting member to lock the limiting member to the mounting base.

9. The zeroing device according to claim 8, characterized in that, The base is provided with a guide groove extending along the first direction, and the movable seat is provided with a guide protrusion protruding from one side facing the base, and the guide protrusion is slidably disposed in the guide groove. The limiting mechanism is housed in the guide groove, and the limiting member is located on the moving path of the guide protrusion.

10. The zero-marking device according to claim 8 or 9, characterized in that, The base is also provided with a scale arranged along the first direction, and the movable seat has marking lines on the side facing the scale.

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