adjusting device

Abstract

The application relates to a regulating device, which comprises a first regulating structure, one end of which is used for being mounted on a first gear; a second regulating structure, one end of which is used for being mounted on a second gear, the second regulating structure being sleeved on the other end of the first regulating structure; and a third regulating structure, which is arranged at one end of the first regulating structure provided with the second regulating structure; wherein the third regulating structure is provided with a regulating mark, and the third regulating structure is configured to be capable of rotating according to the regulating mark, so as to drive the first regulating structure and the second regulating structure to rotate, thereby enabling the first regulating structure to drive the first gear and the second regulating structure to drive the second gear to move along the direction of the line connecting the rotation center of the first gear and the rotation center of the second gear. According to the regulating device, the third regulating structure is rotated according to the regulating mark, so that the gear side gap of the gear pair formed by the first gear and the second gear meets the requirements, and the precision requirement of relevant parts is reduced, thereby reducing the machining difficulty of the relevant parts.

Description

Technical Field

[0001] This application relates to the field of gear pair adjustment technology, and in particular to an adjustment device for adjusting the tooth backlash of a gear pair. Background Technology

[0002] The valve train of a diesel engine has a significant impact on engine performance. In order to make the valve train meet the requirements and match the gear pair formed by the intermediate gear on the cylinder head and the camshaft gear, the adjustment of the tooth flank clearance of the gear pair is more difficult, resulting in the tooth flank clearance not meeting the requirements.

[0003] In related technologies, in order to ensure that the tooth flank clearance of the gear pair meets the requirements, the precision of the housing, support components and other parts used to install and position the gear pair is generally improved, which will greatly increase the machining difficulty of these related parts. Summary of the Invention

[0004] Therefore, it is necessary to provide an adjustment device for adjusting the tooth backlash of a gear pair so that the adjusted tooth backlash meets the requirements, thereby reducing the precision requirements of related components and reducing the processing difficulty of these related components.

[0005] According to one aspect of this application, an adjusting device is provided for adjusting the tooth backlash of a gear pair, the gear pair including a meshing first gear and a second gear; the adjusting device includes:

[0006] A first adjustment structure, one end of which is used to be mounted on the first gear;

[0007] A second adjusting structure, one end of which is mounted on the second gear, and the second adjusting structure is sleeved over the other end of the first adjusting structure; and

[0008] The third adjustment structure is located at the end of the first adjustment structure where the second adjustment structure is located;

[0009] The third adjustment structure is provided with an adjustment mark. The third adjustment structure is configured to rotate according to the adjustment mark to drive the second adjustment structure to move along a first direction, thereby causing the first adjustment structure to drive the first gear and the second adjustment structure to drive the second gear to move along the line connecting the rotation center of the first gear and the rotation center of the second gear.

[0010] The aforementioned adjustment device, by setting a first adjustment structure, a second adjustment structure, and a third adjustment structure, rotates the third adjustment structure according to the adjustment mark, thereby driving the second adjustment structure to move along the first direction. Since the first adjustment structure is located on the first gear and the second adjustment structure is located on the second gear, the first adjustment structure can drive the first gear, and the second adjustment structure can drive the second gear to move along the line connecting the rotation center of the first gear and the rotation center of the second gear. This ensures that the tooth flank clearance of the gear pair formed by the first gear and the second gear meets the requirements, thereby reducing the precision requirements of related components and reducing the processing difficulty of these related components.

[0011] In one embodiment, the first adjustment structure includes:

[0012] A first adjusting member extending along a first direction;

[0013] A first connecting member extending along a second direction is disposed at one end of the first adjusting member along the first direction; the first gear is mounted on the first connecting member; and

[0014] A second connecting member extending along the first direction is disposed at the other end of the first adjusting member along the first direction; a second adjusting structure is sleeved on the second connecting member, and a third adjusting structure is disposed on the second connecting member;

[0015] The first direction and the second direction intersect.

[0016] In one embodiment, the first adjusting member is provided with a groove for providing operating space for assembling the gear pair.

[0017] In one embodiment, the first connector includes a first connecting portion and a first positioning portion extending along the second direction;

[0018] One end of the first connecting part is disposed on the groove wall of the groove, and the first positioning part is connected to the other end of the first connecting part; the first gear is installed on the first positioning part and is located on the side of the first positioning part away from the first connecting part.

[0019] In one embodiment, the second adjustment structure includes:

[0020] The second adjusting member is sleeved outside the second connecting member; and

[0021] A third connecting member extends along the second direction, the third connecting member is located at one end of the second adjusting member along the second direction, and is located on the same side of the first adjusting member as the first connecting member; the second gear is mounted on the third connecting member.

[0022] In one embodiment, the third connector includes a second connecting portion and a second positioning portion extending along the second direction;

[0023] One end of the second connecting part is located at one end of the second adjusting member along the second direction, and the second positioning part is connected to the other end of the second connecting part; the second gear is installed on the second positioning part and is located on the side of the second positioning part away from the second connecting part.

[0024] In one embodiment, the third adjustment structure is cylindrical and extends along the first direction;

[0025] The third adjustment structure includes a rotating component and a fourth connecting component connected to the rotating component;

[0026] The fourth connector is disposed on the second connector.

[0027] In one embodiment, the second connector has a threaded hole along the first direction, and the fourth connector is connected to the second connector via the threaded hole.

[0028] In one embodiment, the outer peripheral surface of the rotating member is provided with a plurality of first scale marks at intervals, and all of the first scale marks constitute the adjustment mark; the second adjusting member is provided with a positioning mark on one side surface along the first direction, and the positioning mark is aligned with one of the first scale marks.

[0029] In one embodiment, the outer peripheral surface of the rotating member is further provided with a second scale mark that corresponds one-to-one with the first scale mark, so as to obtain the tooth backlash of the gear pair. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the assembly of the adjustment structure and gear system in one embodiment of this application.

[0031] Figure 2 For this application Figure 1 A schematic diagram from another angle of the assembly drawing.

[0032] Figure 3 For this application Figure 1 Front view of the assembly drawing.

[0033] Figure 4 This is a schematic diagram of the assembly of the adjustment structure in one embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the first adjustment structure in one embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the second adjustment structure in one embodiment of this application.

[0036] Figure 7 This is a schematic diagram of the third adjustment structure in one embodiment of this application.

[0037] Explanation of icon numbers:

[0038] 10. Adjustment device; 11. First adjustment structure; 111. First adjustment component; 1111. Groove; 112. First connecting component; 1121. First connecting part; 1122. First positioning part; 113. Second connecting component; 1131. Threaded hole; 12. Second adjustment structure; 121. Second adjustment component; 1211. Positioning mark; 1212. Mounting hole; 122. Third connecting component; 1221. Second connecting part; 1222. Second positioning part; 13. Third adjustment structure; 131. Rotating component; 1311. First scale mark; 132. Fourth connecting component; 133. Adjustment mark;

[0039] 21. First gear; 22. Second gear; 23. Intermediate gear shaft; 24. Camshaft; 25. Cylinder head assembly; 26. Camshaft frame; X: First direction; Y: Second direction. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0042] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0045] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "intersecting," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0046] Figure 1 This is a schematic diagram of the assembly of the adjustment structure and gear system in one embodiment of this application; Figure 2 For this application Figure 1 A schematic diagram from another angle of the assembly drawing; Figure 3 For this application Figure 1 Front view of the assembly drawing.

[0047] See Figures 1 to 3 This application provides an adjustment device 10 for adjusting the tooth backlash of a gear pair, the gear pair including a first gear 21 and a second gear 22 meshing together. The adjustment device 10 includes a first adjustment structure 11, a second adjustment structure 12, and a third adjustment structure 13. One end of the first adjustment structure 11 is mounted on the first gear 21, one end of the second adjustment structure 12 is mounted on the second gear 22, and the second adjustment structure 12 is sleeved outside the other end of the first adjustment structure 11. The third adjustment structure 13 is located at the end of the first adjustment structure 11 where the second adjustment structure 12 is located. The third adjustment structure 13 is provided with an adjustment mark 133. The third adjustment structure 13 is configured to rotate according to the adjustment mark 133 to drive the second adjustment structure 12 to move along a first direction, thereby causing the first adjustment structure 11 to drive the first gear 21 and the second adjustment structure 12 to drive the second gear 22 to move along the line connecting the rotation center of the first gear 21 and the rotation center of the second gear 22.

[0048] Thus, by setting up a first adjustment structure 11, a second adjustment structure 12, and a third adjustment structure 13, rotating the third adjustment structure 13 according to the adjustment mark 133 drives the first adjustment structure 11 and the second adjustment structure 12 to rotate. Since the first adjustment structure 11 is located on the first gear 21 and the second adjustment structure 12 is located on the second gear 22, the first adjustment structure 11 can drive the first gear 21, and the second adjustment structure 12 can drive the second gear 22 to move along the line connecting the rotation center of the first gear 21 and the rotation center of the second gear 22. This allows the tooth flank clearance of the gear pair formed by the first gear 21 and the second gear 22 to meet the requirements, thereby reducing the precision requirements of related components and reducing the processing difficulty of these related components. Furthermore, the adjustment device 10 has a simple structure and can save the space required for adjustment.

[0049] It should be noted that in this application, the tooth backlash of the gear pair refers to the tooth backlash. The adjustment device 10 of this application is used to adjust the tooth backlash of the gear pair. That is, the tooth backlash mentioned in this application refers to the tooth backlash.

[0050] Figure 4 This is a schematic diagram of the assembly of the adjustment structure in one embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first adjustment structure 11 in one embodiment of this application.

[0051] See Figure 4 and Figure 5 and structure Figure 2 and Figure 3 In some implementations, the first adjustment structure 11 includes a first adjustment member 111, a first connecting member 112, and a second connecting member 113. The first adjustment member 111 is along a first direction (as shown in the attached diagram). Figure 2The first connector 112 extends along the second direction (as shown in the attached diagram) in the X direction; Figure 2 As shown in the Y-direction, the first connecting member 112 is located at one end of the first adjusting member 111 along the first direction, and the first gear 21 is mounted on the first connecting member 112; the second connecting member 113 extends along the first direction and is located at the other end of the first adjusting member 111 along the first direction; the second adjusting structure 12 is sleeved on the second connecting member 113, and the third adjusting structure 13 is located on the second connecting member 113. The first direction and the second direction intersect.

[0052] Thus, by setting the first connecting member 112 and mounting the first gear 21 on the first connecting member 112, and setting the third adjusting structure 13 on the second connecting member 113, the third adjusting structure 13 can drive the second adjusting structure 12 to move along the first direction when it rotates. This causes the first adjusting structure 11 to drive the first gear 21 to move along the line connecting the rotation center of the first gear 21 and the rotation center of the second gear 22, thereby adjusting the tooth backlash of the gear pair formed by the first gear 21 and the second gear 22 so that the tooth backlash meets the requirements. This reduces the precision requirements of related components and lowers the processing difficulty of these related components.

[0053] See Figure 4 and Figure 5 In some embodiments, the first adjusting member 111 is provided with a groove 1111, which provides operating space for the assembly of the gear pair.

[0054] See Figure 4 and Figure 5 In some embodiments, the first connector 112 includes a first connecting portion 1121 and a first positioning portion 1122 extending along a second direction. One end of the first connecting portion 1121 is disposed on the groove wall of the groove 1111, and the first positioning portion 1122 is connected to the other end of the first connecting portion 1121; the first gear 21 is mounted on the first positioning portion 1122 and is located on the side of the first positioning portion 1122 opposite to the first connecting portion 1121.

[0055] Thus, by providing the first connecting part 1121, there is a gap between the first adjusting member 111 and the first positioning part 1122 in the second direction. This gap is used to avoid the housing and other components that mount the first gear 21 and the second gear 22, thereby facilitating the connection between the first gear 21 and the first positioning part 1122 and preventing interference between the various parts.

[0056] Figure 6 This is a schematic diagram of the second adjustment structure 12 in one embodiment of this application.

[0057] See Figure 4 and Figure 6 and structure Figure 2 and Figure 3 In some implementations, the second adjustment structure 12 includes a second adjustment member 121 and a third connecting member 122. The second adjustment member 121 has a mounting hole 1212 extending along a first direction, and the second adjustment member 121 is sleeved on the outside of the second connecting member 113 through the mounting hole 1212; the third connecting member 122 extends along a second direction, and is located at one end of the second adjustment member 121 along the second direction, and is located on the same side of the first adjustment member 111 as the first connecting member 112; the second gear 22 is mounted on the third connecting member 122.

[0058] It is understood that the first connector 112 and the third connector 122 extend in the same direction, both extending along the second direction, so as to connect the first gear 21 and the first connector 112, and the second gear 22 and the third connector 122.

[0059] See Figure 4 and Figure 6 In some embodiments, the third connector 122 includes a second connecting portion 1221 and a second positioning portion 1222 extending along a second direction. One end of the second connecting portion 1221 is located at one end of the second adjusting member 121 along the second direction, and the second positioning portion 1222 is connected to the other end of the second connecting portion 1221; the second gear 22 is mounted on the second positioning portion 1222 and is located on the side of the second positioning portion 1222 opposite to the second connecting portion 1221.

[0060] Thus, by providing the second connecting part 1221, the second adjusting part 121 and the second positioning part 1222 are spaced apart in the second direction. This space is used to avoid the housing and other components that mount the first gear 21 and the second gear 22, thereby facilitating the connection between the second gear 22 and the second positioning part 1222 and preventing interference between the various parts.

[0061] Figure 7 This is a schematic diagram of the third adjustment structure 13 in one embodiment of this application.

[0062] See Figure 4 and Figure 7 and combined Figure 1-3 In some embodiments, the third adjustment structure 13 is cylindrical and extends along the first direction. The third adjustment structure 13 includes a rotating member 131 and a fourth connecting member 132 connecting the rotating member 131; the fourth connecting member 132 is disposed on the second connecting member 113.

[0063] It is understood that when the third adjustment structure 13 rotates, it can drive the second adjustment structure 12 to move along the first direction. At the same time, since the second connecting member 113 and the third adjustment structure 13 are both extended along the first direction, while the first connecting member 112 and the third connecting member 122 are extended along the second direction, the first connecting member 112 can be driven to move along the line connecting the rotation center of the first gear 21 and the rotation center of the second gear 22, and the third connecting member 122 can be driven to move along the line connecting the rotation center of the first gear 21 and the rotation center of the second gear 22, thereby adjusting the tooth backlash of the gear pair.

[0064] See Figure 5 and Figure 7 In some embodiments, the second connector 113 is provided with a threaded hole 1131 along the first direction, and the fourth connector 132 is connected to the second connector 113 via the threaded hole 1131. It can be understood that the outer peripheral surface of the fourth connector 132 is constructed as a threaded surface, and the threaded surface of the fourth connector 132 mates with the threaded hole 1131.

[0065] See Figure 4 and Figure 7 and combined Figure 2 and Figure 3 In some embodiments, the outer peripheral surface of the rotating member 131 is provided with a plurality of first scale marks 1311 at intervals, and all the first scale marks 1311 constitute adjustment marks 133; the second adjusting member 121 is provided with a positioning mark 1211 on one side surface along the first direction, and the positioning mark 1211 is aligned with one of the first scale marks 1311.

[0066] See Figure 4 and Figure 7 In some embodiments, the outer peripheral surface of the rotating member 131 is also provided with a second scale mark (not shown in the figure) that corresponds one-to-one with the first scale mark 1311, so as to obtain the tooth backlash of the gear pair.

[0067] It can be understood that the first scale mark 1311 is a scale line, and the second scale mark is the scale value set corresponding to the first scale line.

[0068] To facilitate understanding of the adjustment principle of the adjustment device 10 of this application, the adjustment process of the adjustment device 10 will be briefly described using the intermediate gear (i.e., the first gear 21 in this application) and the camshaft 24 gear (i.e., the second gear 22 in this application) mentioned in the background art as examples.

[0069] See Figures 1 to 3 and combined Figures 4 to 7 The adjustment process of the adjustment device 10 includes the following two steps:

[0070] (1) Installation process before adjustment: First, install and tighten the cylinder head assembly 25 and camshaft frame 26 (both cylinder head assembly 25 and camshaft frame 26 are related parts for installing the first gear 21 and the second gear 22) on the engine assembly stand. Then, place the camshaft 24 and camshaft 24 gear (actually the camshaft 24 assembly, which includes the camshaft 24 gear) on the camshaft frame 26 respectively. At this time, the bearing cap on the camshaft 24 (the bearing cap is a sealing part) is not tightened. Install the intermediate gear and intermediate gear shaft 23 in sequence, and insert the 3 fixing bolts into the corresponding holes but do not tighten them. At this time, the camshaft 24 gear of the intake and exhaust camshaft 24 and the intermediate gear form a gear pair. The operator aligns and adjusts the gear pair according to the timing mark to ensure that the timing position of the gear pair is correct. After adjusting the timing position correctly, the bearing cap on the camshaft 24 can be tightened as required.

[0071] (2) Backlash adjustment and gear pair installation process: Start assembling the adjustment device 10, insert the second connector 113 into the mounting hole 1212, and then screw the fourth connector 132 into the threaded hole 1131 of the second connector 113. Record the second scale mark corresponding to the first scale mark 1311 aligned with the positioning mark 1211 at this time (the reading of the second scale mark at this time is recorded as X0); install the first positioning part 1122 and the second positioning part 1222 of the adjustment device 10 into the positioning hole and cam at the center of the corresponding intermediate gear shaft 23, respectively. The positioning hole at the end of shaft 24; then first rotate the rotating part 131 clockwise until it can no longer rotate, and record the second scale mark corresponding to the first scale mark 1311 aligned with the positioning mark 1211 at this time (the absolute value of the difference between the reading of the second scale mark and X0 at this time is recorded as X1), and obtain the tooth backlash Y1 of the first gear 21 and the second gear 22 at this time through a measuring tool, then rotate the rotating part 131 counterclockwise until it can no longer rotate, and record the second scale mark corresponding to the first scale mark 1311 aligned with the positioning mark 1211 at this time ( At this point, the absolute value of the difference between the reading of the second scale mark and X0 is recorded as X2. The tooth flank clearance Y2 of the first gear 21 and the second gear 22 is obtained using a measuring tool. According to the conversion rule, the correspondence between the standard range of the tooth flank clearance formed by Y1 and Y2 and the scale range of the second scale mark formed by X1 and X2 can be obtained. When installing another first gear 21 and second gear 22 of the same model, and the center distance between the first gear 21 and the second gear 22 is also the same, it is only necessary to record the corresponding X0 first in this step, and then rotate clockwise or... Rotate the rotating part 131 counterclockwise. The rotation range of the rotating part 131 clockwise is such that the absolute value of the difference between the reading of the second scale mark corresponding to the first scale mark 1311 aligned with the positioning mark 1211 and X0 does not exceed X1. The rotation range of the rotating part 131 counterclockwise is such that the absolute value of the difference between the reading of the second scale mark corresponding to the first scale mark 1311 aligned with the positioning mark 1211 and X0 does not exceed X2. Then tighten the three fixing bolts of the intermediate gear shaft 232 and remove the adjusting device 10.

[0072] To facilitate adjustment, when installing the adjustment device 10, the positioning mark 1211 can always be aligned with the same first scale mark 1311, and the reading X0 of the second scale mark corresponding to the first scale mark 1311 can be 0, which can improve the adjustment efficiency.

[0073] It is understandable that you only need to obtain the range of tooth flank clearance and the corresponding range of the second scale mark through the first step. For the first gear 21 and the second gear 22 of the same model, and the center distance of the first gear 21 and the second gear 22 is also the same, you can directly rotate the rotating part 131 to the corresponding range.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An adjusting device for adjusting the tooth backlash of a gear pair, the gear pair comprising a meshing first gear and a second gear; characterized in that, The regulating device includes: A first adjustment structure, one end of which is used to be mounted on the first gear; A second adjusting structure, one end of which is mounted on the second gear, and the second adjusting structure is sleeved over the other end of the first adjusting structure; and The third adjustment structure is located at the end of the first adjustment structure where the second adjustment structure is located; The third adjustment structure is provided with an adjustment mark, and the third adjustment structure is configured to rotate according to the adjustment mark to drive the second adjustment structure to move along the first direction, thereby causing the first adjustment structure to drive the first gear and the second adjustment structure to drive the second gear to move along the line connecting the rotation center of the first gear and the rotation center of the second gear. The first adjustment structure includes: A first adjusting member extending along a first direction; A first connecting member extending along a second direction is disposed at one end of the first adjusting member along the first direction; the first gear is mounted on the first connecting member; and A second connecting member extending along the first direction is disposed at the other end of the first adjusting member along the first direction; a second adjusting structure is sleeved on the second connecting member, and a third adjusting structure is disposed on the second connecting member; Wherein, the first direction and the second direction intersect; The first adjusting member is provided with a groove, which is used to provide operating space for the assembly of the gear pair; The second adjustment structure includes: The second adjusting member is sleeved outside the second connecting member; and A third connecting member extending along the second direction is disposed at one end of the second adjusting member along the second direction and is located on the same side of the first adjusting member as the first connecting member; the second gear is mounted on the third connecting member; The third adjustment structure is cylindrical and extends along the first direction; The third adjustment structure includes a rotating component and a fourth connecting component connected to the rotating component; The fourth connector is disposed on the second connector; The second connector has a threaded hole along the first direction, and the fourth connector is connected to the second connector via the threaded hole.

2. The adjusting device according to claim 1, characterized in that, The first connector includes a first connecting portion and a first positioning portion extending along the second direction; One end of the first connecting part is disposed on the groove wall of the groove, and the first positioning part is connected to the other end of the first connecting part; the first gear is installed on the first positioning part and is located on the side of the first positioning part away from the first connecting part.

3. The adjusting device according to claim 1, characterized in that, The third connector includes a second connecting portion and a second positioning portion extending along the second direction; One end of the second connecting part is located at one end of the second adjusting member along the second direction, and the second positioning part is connected to the other end of the second connecting part; the second gear is installed on the second positioning part and is located on the side of the second positioning part away from the second connecting part.

4. The adjusting device according to claim 1, characterized in that, The outer circumferential surface of the rotating component is provided with a plurality of first scale marks at intervals, and all of the first scale marks constitute the adjustment mark; the second adjusting component is provided with a positioning mark on one side surface along the first direction, and the positioning mark is aligned with one of the first scale marks.

5. The adjusting device according to claim 4, characterized in that, The outer circumferential surface of the rotating component is also provided with a second scale mark that corresponds one-to-one with the first scale mark, so as to obtain the tooth backlash of the gear pair.

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