Connection device and measuring apparatus

Abstract

The application discloses a connecting device and a measuring device, comprising a support, a floating part and a tensioning mechanism, wherein the support comprises a guide rod extending in a vertical direction, the floating part is installed on the guide rod and can float in the vertical direction relative to the guide rod, the tensioning mechanism is rotatably installed on the floating part around an axis in the vertical direction, and one end of the tensioning mechanism protrudes from the bottom of the support, wherein the end of the tensioning mechanism can be converted between an expansion state and a contraction state. According to the technical scheme of the application, when the tensioning mechanism is connected with the center hole of the shaft to be measured, the workpiece and the tensioning mechanism can be displaced in the vertical direction through the floating part, so that the displacement of the shaft to be measured in the tensioning connection process is offset.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing, and more specifically, to a connecting device and a measuring device. Background Technology

[0002] For example, the height of shaft parts such as engine gear shafts needs to be measured before assembly. To meet the operating conditions, the shaft part to be measured is usually required to be rotated. Currently, the common measurement method is to connect a rotatable tensioning shaft to the center hole of the shaft to be measured, so that the tensioning shaft drives the center hole of the shaft to rotate together. Theoretically, the measuring equipment should not be affected by any external force, otherwise the measurement will be inaccurate. When the tensioning shaft tightens the shaft to be measured, it will pull on the shaft to be measured, causing axial displacement. Moreover, the tensioning connection mechanism of the measuring equipment is rigid and cannot eliminate the displacement, which will directly affect the measurement results.

[0003] Therefore, how to avoid displacement during the tensioning process is the technical problem that this application needs to solve. Summary of the Invention

[0004] In view of this, this application proposes a method to overcome the above-mentioned technical problems.

[0005] According to this application, a connecting device is proposed, comprising: a bracket, a floating part, and a tensioning mechanism, wherein the bracket includes a guide rod extending in a vertical direction, the floating part is mounted on the guide rod and is capable of floating in a vertical direction relative to the guide rod, the tensioning mechanism is rotatably mounted on the floating part about a vertical axis, and one end of the tensioning mechanism protrudes from the bottom of the bracket, wherein the end of the tensioning mechanism is capable of switching between an expanded state and a contracted state.

[0006] Preferably, the connecting device includes a fixed part that is fixedly connected to the guide rod, and the floating part is floatingly connected to the fixed part through an elastic element.

[0007] Preferably, the floating part defines an inner cavity, and the bottom of the floating part has a first opening communicating with the inner cavity, the tensioning mechanism extends downward through the first opening, and the top of the tensioning mechanism is axially confined within the inner cavity.

[0008] Preferably, the fixing part is disposed below the floating part to limit the tensioning mechanism, and / or the floating part is connected to the guide rod via a linear bearing sleeved on the guide rod.

[0009] Preferably, the tensioning mechanism includes a cylindrical housing, and one end of the housing includes an opening capable of elastic deformation in the radial direction. Inside the housing is a rod capable of moving vertically relative to the housing. The rod includes a compression portion whose cross-section protrudes outward relative to the other parts of the rod. By moving vertically, the compression portion can switch between an expanded state, where the opening is compressed by the compression portion and thus expands radially, and a tightened state, where the opening is released from the compression portion and thus returns to its original shape.

[0010] Preferably, the opening includes a tapered tube portion that tapers vertically upwards, and the extrusion portion includes a tapered portion that tapers vertically downwards. The tapered portion can be housed in the tapered tube portion, and the outer wall of the tapered portion fits against the inner wall of the tapered tube portion.

[0011] Preferably, an elastic body in a compressed state is disposed within the housing surrounding at least a portion of the rod, the elastic body abutting against the rod and the housing to cause the rod to tend to move upward relative to the housing, and the connecting device includes a pushing mechanism capable of pushing the rod downward.

[0012] Preferably, the top of the floating part has a second opening corresponding to the first opening, and the top of the housing has a through hole corresponding to the second opening. The pushing mechanism is installed on the top of the floating part, and the pushing mechanism includes a pushing head that can move vertically relative to the housing. The pushing head is connected to the rod part through the second opening and the through hole.

[0013] Preferably, the bracket includes a base plate and a top plate, and at least two guide rods are installed between the base plate and the top plate, wherein the base plate has a through hole for the tensioning mechanism to pass through.

[0014] According to this application, a measuring device is also proposed, characterized in that it includes the connecting device as described above, and a driving mechanism mounted on the bracket, wherein the driving mechanism is capable of driving the tensioning mechanism to rotate.

[0015] According to the technical solution of this application, when the tensioning mechanism is connected to the center hole of the shaft to be measured, the workpiece and the tensioning mechanism can be displaced in the vertical direction through the floating part, thereby offsetting the displacement generated during the tensioning connection process of the tensioning mechanism.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of a connection device according to one embodiment of this application;

[0019] Figure 2 for Figure 1 A cross-sectional view of the connecting device shown;

[0020] Figure 3 for Figure 2 An enlarged view of the connecting device with its opening in a tightened state;

[0021] Figure 4 for Figure 3 An enlarged view of the connecting device with its opening in an expanded state;

[0022] Figure 5 for Figure 2 An enlarged view of the floating part of the connecting device shown;

[0023] Figure 6 This is a schematic diagram of a measuring device according to one embodiment of this application;

[0024] Figure 7 for Figure 6 The cross-sectional view of the measuring device shown. Detailed Implementation

[0025] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] According to one aspect of this application, a connecting device is provided, including a bracket 100, a floating part 210, and a tensioning mechanism 300, wherein the bracket 100 includes a guide rod 101 extending in a vertical direction, the floating part 210 is mounted on the guide rod 101 and is capable of floating in a vertical direction relative to the guide rod 101, the tensioning mechanism 300 is rotatably mounted on the floating part 210 about a vertical axis, and one end of the tensioning mechanism 300 protrudes from the bottom of the bracket 100, wherein the end of the tensioning mechanism 300 is capable of switching between an expanded state and a contracted state.

[0027] According to the technical solution of this application, when the tensioning mechanism 300 is connected to the center hole of the shaft to be measured (workpiece), the workpiece and the tensioning mechanism 300 can be displaced in the vertical direction through the floating part 210, so that the connecting device and the shaft to be measured are flexibly connected in the vertical direction. Since the weight of the shaft to be measured and the tensioning mechanism 300 can be offset by the floating part 210 to offset the displacement generated during the tensioning connection process, the displacement generated during the tensioning connection process caused by the rigid connection between the traditional measuring device and the shaft to be measured is avoided.

[0028] In the technical solution of this application, the bracket 100 supports the floating part 210 and the tensioning mechanism 300 to flexibly connect the connecting device with the shaft to be tested in the vertical direction. The tensioning mechanism 300 is inserted into the center hole of the shaft to be tested from above and tensions with the center hole of the shaft to be tested, so that the tensioning mechanism 300 and the shaft to be tested can rotate synchronously around the axis after connection. The tensioning mechanism 300 can take an appropriate form to connect with the shaft to be tested. For example, the end of the tensioning mechanism 300 can be deformed by hydraulic or pneumatic pressure, thereby expanding the end of the tensioning mechanism 300 and squeezing the inner wall of the center hole from the inside of the center hole of the shaft to be tested to achieve tension connection; it can also be tensioned with the center hole of the shaft to be tested by a mechanism similar to an expansion bolt, for example. There is no limitation here, as long as the end of the tensioning mechanism 300 can switch between an expanded state and a contracted state to achieve tension connection with the center hole of the shaft to be tested. The tensioning mechanism 300 is rotatably connected to the floating part 210, and the floating part 210 is vertically floatingly connected to the support 100, thereby enabling the tensioning mechanism 300 to float vertically relative to the support 100 and to rotate about an axis.

[0029] The guide rod 101 can be in a suitable form to be floatingly connected to the floating part 210. The floating part 210 may include a sleeve structure that can be fitted onto the guide rod 101, or be connected to the guide rod 101 by providing a through hole in the floating part 210 that matches the guide rod 101, thereby enabling the floating part 210 to move along the extension direction of the guide rod 101. Furthermore, the floating part 210 can be connected to the bracket 100 by elastic elements such as springs, tension springs, or floating hydraulic cylinders. For example, by installing a tension spring between the top of the bracket 100 and the floating part 210, or by installing a floating hydraulic cylinder or spring between the bottom of the bracket 100 and the floating part 210, the floating part 210 can float vertically relative to the bracket 100.

[0030] Through this application, since the tensioning mechanism 300 and the floating part 210 are rotatably connected, the tensioning mechanism 300 can float vertically relative to the support 100 and rotate around the axis. The end of the tensioning mechanism 300 protruding from the support 100 can be inserted into the central hole of the shaft to be tested, so that the tensioning mechanism 300 and the shaft to be tested form a tensioned connection and can rotate together around the axis. Furthermore, the floating part 210 enables the connecting device and the shaft to be tested to form a flexible connection in the vertical direction. During the connection process, the position of the support 100 relative to the shaft to be tested is fixed, while the tensioning mechanism 300 can float vertically relative to the support 100. The upward displacement generated during the tensioning process can be offset by the floating generated by the floating part 210, so that the weight of the shaft to be tested can keep it in its original position during the tensioning process, avoiding displacement of the shaft to be tested during the tensioning process.

[0031] In order to achieve a floating connection between the floating part 210 and the bracket 100, according to a preferred embodiment, the connecting device includes a fixed part 211 fixedly connected to the guide rod 101, and the floating part 210 is floatingly connected to the fixed part 211 through an elastic member 202.

[0032] In this application, the fixing part 211 can be installed above, below, or to the side of the floating part 210, and connected to the floating part 210 via an elastic member 202. For example, the fixing part 211 can be fixedly installed on the top of the bracket 100 above the floating part 210, and the bottom of the fixing part 211 can be connected to the top of the floating part 210 via an elastic member 202 such as a tension spring, thereby causing the floating part 210 to float and connect with the bracket by pulling the floating part 210; the fixing part 211 can also be fixedly installed on the bottom of the bracket 100 below the floating part 210, and the top of the fixing part 211 can be connected to the bottom of the floating part 210 via an elastic member such as a spring, thereby causing the floating part 210 to float and connect with the bracket. By supporting the floating part 210 from below, the floating part 210 is made to float and connect with the bracket 100. The elastic member 202 should be in a non-critical state that can float up and down after being connected with the floating part 210 and the fixed part 211. That is, the elastic member 202 can still deform after being connected with the floating part 210 and the fixed part 211, so that the floating part 210 is in a floating state, so as to meet the requirement that it can float in the vertical direction after being connected with the shaft to be measured. This will not be elaborated here, as long as the floating part 210 and the bracket 100 can be floated and connected.

[0033] The fixing part 211 can be connected to the bracket 100 in an appropriate form. For example, the fixing part 211 can be connected to the bracket 100 in the form of multiple support rods extending in the vertical direction. When installed below the floating part 210, it can be arranged circumferentially around the bottom of the floating part 210 to leave space for the tensioning mechanism 300, or a cylindrical structure can be used to allow the tensioning mechanism 300 to pass through it. These are just some of the various forms that can be used to achieve a fixed connection with the bracket 100.

[0034] Through the technical solution of this application, the bracket 100 is fixedly connected to the fixed part 211, and the floating part 210 is floatingly connected to the fixed part 211 through the elastic member 202, so that the tensioning mechanism 300 can be floatingly connected to the bracket 100, thereby realizing the flexible connection between this connection device and the shaft to be measured.

[0035] Since the floating part 210 can provide sufficient floating amount to offset the displacement of the tensioning mechanism 300 during the tensioning connection process, the tensioning mechanism 300 can maintain a fixed position in the vertical direction with the floating part 210, so that the tensioning mechanism 300 cannot be displaced in the vertical direction relative to the floating part 210. According to a preferred embodiment, such as Figure 5 As shown, the floating part 210 defines an inner cavity, and the bottom of the floating part 210 has a first opening 2101 communicating with the inner cavity. The tensioning mechanism 300 extends downward through the first opening 2101, and the top of the tensioning mechanism 300 is axially confined within the inner cavity.

[0036] In this application, the top of the tensioning mechanism 300 may have an annular flange, and the floating part 210 may have an inner cavity that matches the annular flange, so that the annular flange is axially confined in the inner cavity, thereby preventing the tensioning mechanism 300 from moving vertically relative to the floating part 210. In addition, in order to reduce the friction between the top of the tensioning mechanism 300 and the inner cavity during rotation, bearings 220 may be installed on the upper and lower sides of the annular flange.

[0037] To improve the stability of the tensioning mechanism 300 during rotation and prevent swaying, according to a preferred embodiment, such as... Figure 1 and 2 As shown, the fixed part 211 is disposed below the floating part 210 to limit the tensioning mechanism 300, and / or the floating part 210 is connected to the guide rod 101 via a linear bearing 201 sleeved on the guide rod 101.

[0038] In this application, the fixing part 211 is installed below the floating part 210 and can be connected to the floating part 210 via an elastic element 202, such as a spring. The fixing part 211 may have a cylindrical shape to fit over the tensioning mechanism 300, with the tensioning mechanism 300 housed within the inner cavity of the fixing part 211. The inner wall of the fixing part 211 can match the outer wall of the tensioning mechanism 300. The floating part 210 is installed above the fixing part 211 via the elastic element 202, so that the fixing part 211 restricts the floating range of the floating part 210 in the vertical direction, thereby limiting the vertical movement range of the tensioning mechanism 300.

[0039] Furthermore, the floating part 210 can be connected to the guide rod 101 via the linear bearing 201, thereby reducing the friction between the floating part 210 and the guide rod 101 during the floating process.

[0040] The tensioning mechanism 300 can take a suitable form to facilitate tensioning connection with the shaft to be measured. According to a preferred embodiment, the tensioning mechanism 300 includes a cylindrical housing 301, and one end of the housing 301 includes an opening 304 capable of elastic deformation in the radial direction. A rod 302 capable of moving vertically relative to the housing 301 is provided inside the housing 301. The rod 302 includes a pressing part 303 whose cross-section protrudes outward relative to the other parts of the rod 302. The pressing part 303 can switch between an expanded state, in which the opening 304 is radially expanded due to being pressed by the pressing part 303, and a tightened state, in which the opening 304 returns to its original shape after being released from the pressing part 303, by moving vertically.

[0041] In the technical solution of this application, the opening 304 of the housing 301 serves as the end of the tensioning mechanism 300 used to insert into the central hole of the shaft to be measured. The opening 304 can take an appropriate form to achieve expansion and tightening. For example, multiple grooves can be opened from the bottom end of the opening 304 upward to divide the opening 304 into multiple segments. When an external force is applied radially outward from the inside of the opening 304 to the inner wall of the multiple segments, the multiple segments can expand radially outward, thereby entering an expanded state. When the external force is removed, the multiple segments can return to their original state, thereby entering a tightened state. To achieve the extrusion of the opening 304 from the inside of the housing 301 outward, a rod 302 capable of vertical movement can be provided inside the housing 301. The rod 302 includes an extrusion portion 303 with a diameter larger than the diameter of other parts of the rod 302. Furthermore, the housing 301 may have multiple inner diameters, with at least the opening 304 or its vicinity including an inner diameter portion that matches the diameter of the extrusion portion 303. Other parts of the housing 301 may match the diameter of other parts of the rod 302.

[0042] For example, the walls of most of the housing 301 can be thicker so that the inner diameter of this portion of the housing 301 matches the diameter of most of the rod 302 but is smaller than the diameter of the pressing part 303. The walls of the opening 304 portion can be thinner, allowing the pressing part 303 to be accommodated without compressing the inner wall of the opening 304. Thus, by moving the rod 302, the pressing part 303 can be moved to different inner diameter positions within the housing 301. When the pressing part 303 is in the matching inner diameter portion, it does not compress the opening 304, and the opening 304 is in a tightened state. When the pressing part 303 moves from the larger inner diameter portion to the smaller inner diameter portion, it compresses the inner wall of the opening 304 from the inside out, causing the flap to open radially outward, thus entering an expanded state. When the pressing part 303 moves back to the larger inner diameter portion, the flap can return to the tightened state, thereby achieving the switching of the end of the tensioning mechanism between the tightened and expanded states.

[0043] The rod 302 can be driven by a drive device such as a hydraulic cylinder or a motor, thereby moving the rod 302 within the housing 301.

[0044] Through this application, the tensioning mechanism 300 can apply radially outward pressure to the opening 304 by moving the rod 302, thereby realizing the conversion between the expansion state and the tightening state of the opening 304, so that the opening 304 can be inserted into the center hole of the shaft to be tested when it is tightened, and the tensioning connection with the shaft to be tested can be realized by converting the opening 304 from the tightening state to the expansion state.

[0045] The squeezing part 303 and the opening part 304 can be of suitable form to allow the opening part 304 to switch between a tightened state and an expanded state by moving the squeezing part 303. According to a preferred embodiment, such as... Figures 2 to 4 As shown, the opening 304 includes a tapered tube portion that tapers vertically upwards, and the extrusion portion 303 includes a tapered portion that tapers vertically downwards. The tapered portion can be housed in the tapered tube portion, and the outer wall of the tapered portion fits against the inner wall of the tapered tube portion.

[0046] In the technical solution of this application, the conical tube portion can be disposed at the end of the opening 304, and the inner contour of the conical tube portion matches the outer contour of the conical portion, so that the conical portion can be accommodated within the conical tube portion, for example... Figure 3 As shown, at this time, the conical part is completely contained within the conical tube section, and the maximum diameter of the conical part is located at the maximum inner diameter of the conical tube section. The conical part does not exert pressure on the inner wall of the opening 304. When the rod 302 is moved upward, it will cause the pressing part 303 to move upward, as shown. Figure 4As shown, at this time, the maximum diameter portion of the cone moves upward and separates from the maximum inner diameter portion of the cone tube, causing the cone to move to a position where the inner diameter is smaller than the maximum diameter portion of the cone, so that the cone applies radially outward pressure to the inner wall of the opening 304, thereby causing the opening 304 to gradually expand radially outward and enter the expansion state.

[0047] In order to keep the tensioning mechanism 300 in an expanded state under normal conditions, according to a preferred embodiment, such as Figure 2 As shown, an elastic body 306 in a compressed state is disposed within the housing 301 surrounding at least a portion of the rod 302. The elastic body 306 abuts against the rod 302 and the housing 301 to cause the rod 302 to maintain an upward tendency relative to the housing 301. Furthermore, the connecting device includes a pushing mechanism 204 capable of pushing the rod 302 downward.

[0048] In the technical solution of this application, the housing 301 may include a portion for accommodating the elastic body 306, and the bottom of the portion forms a stepped cross-section to stop the elastic body 306 from below. The top of the rod 302 may have a boss to stop the elastic body 306 from above. The top of the housing 301 may have a stop structure to stop the rod 302 to limit the range of movement of the rod 302 in the housing 301. The elastic body 306 may be a disc spring, and the upper and lower ends are connected to the rod 302 and the housing 301 respectively through a first washer 308 and a second washer 309.

[0049] The compressed elastomer 306 can push the rod 302 upward, causing the rod 302 to be stopped by the stop structure at the top of the housing 301. This keeps the pressing part 303 at the bottom of the rod 302 in the position of pressing the opening 304, thus keeping the opening 304 in an expanded state. To allow the opening 304 to return to a tightened state, the pushing mechanism 204 can be used to move the rod 302 downward against the repulsive force of the elastomer 306, causing the pressing part 303 to move downward to a position where it can no longer apply pressure to the opening 304, thus allowing the opening 304 to return to a tightened state. The pushing mechanism 204 can be installed in a suitable position to connect with the rod 302. For example, the pushing mechanism 204 can be installed on one side of the housing 301, and a vertical groove can be opened in a suitable position of the housing 301. The rod 302 can include a connecting part that can move along the groove. The pushing mechanism 204 can be connected to the rod 302 through the connecting part, thereby driving the rod 302 to move, etc. There are no restrictions here, as long as the rod 302 can be moved by the pushing mechanism 204.

[0050] The actuating mechanism 204 can be connected to the lever 302 in a suitable manner, according to a preferred embodiment, such as... Figure 2 As shown, the top of the floating part 210 has a second opening 2102 corresponding to the first opening 2101, and the top of the housing 301 has a through hole 307 corresponding to the second opening 2102. The pushing mechanism 204 is installed on the top of the floating part 210, and the pushing mechanism 204 includes a pushing head 2041 that can move vertically relative to the housing 301. The pushing head 2041 is connected to the rod part 302 through the second opening 2102 and the through hole 307.

[0051] According to the technical solution of this application, the pushing mechanism 204 is installed on the top of the floating part 210 and the pushing head 2041, which can move vertically, can pass through the second opening 2102 located on the top of the floating part 210 and the through hole 307 on the top of the housing 301 in sequence and extend into the housing 301 to connect with the top of the rod part 302. The pushing head 2041 can push the rod part 302 to move downward in the vertical direction, so that the opening 304 is in a tightened state. When the pushing head 2041 retracts, the rod part 302 receives the elastic force of the elastic body 306 and moves upward, so that the opening 304 returns to the expanded state.

[0052] The support 100 can take a suitable form to ensure structural stability, according to a preferred embodiment, such as... Figure 1 As shown, the bracket 100 includes a base plate 103 and a top plate 102, and at least two guide rods 101 are installed between the base plate 103 and the top plate 102. The base plate 103 has a through hole for the tensioning mechanism 300 to pass through.

[0053] Through the technical solution of this application, the bracket 100 forms a frame structure through the base plate 103, the top plate 102 and at least two guide rods 101, which increases the structural stability. The two ends of the guide rods 101 are fixed to the base plate 103 and the top plate 102 respectively. Preferably, the fixing part 211 can be fixed to the guide rods 101 through the intermediate plate 104 to further improve the stability of the fixing part 211.

[0054] According to another aspect of this application, a measuring device is also provided, including the connection device as described above, and a drive mechanism mounted on the bracket 100, wherein the drive mechanism is capable of driving the tensioning mechanism 300 to rotate.

[0055] The measuring device is used to measure the height of the gear shaft, that is, to measure the height difference between the top of the gear shaft and the plane where the gearbox joint is located, so as to install a suitable washer for the gear shaft and close the gearbox. The measuring device needs to measure the shaft under test during rotation. In order for the shaft under test to rotate, which is connected to the tensioning mechanism 300, the tensioning mechanism 300 needs to be driven to rotate.

[0056] In the technical solution of this application, the driving mechanism may include a rotary motor 401 fixedly connected to the bracket 100, a driving gear 402 that can be driven by the rotary motor 401, a first transmission gear 404 fixedly connected to the tensioning mechanism 300, and a second transmission gear 403 meshing with the driving gear 402 and the first transmission gear 404, wherein the rotation axes of the driving gear 402, the first transmission gear 404 and the second transmission gear 403 are parallel to the rotation axis of the tensioning mechanism 300. The fixing part 211 may have a cylindrical shape, and at least a portion of its inner cavity has an inner diameter that matches the diameter of the first transmission gear 404, so that the first transmission gear 404 can rotate within the fixing part 211. In order to connect with the second transmission gear 403, the fixing part 211 may have a slot 2111 that exposes at least a portion of the first transmission gear 404. The second transmission gear 403 can pass through the slot 2111 and mesh with the first transmission gear 404, thereby causing the rotary motor 401 to drive the drive gear 402 to rotate, and then the second transmission gear 403 drives the first transmission gear 404 to rotate, thereby driving the tensioning mechanism 300 to rotate and thus driving the gear shaft to be tested to rotate. The inner cavity of the fixing part 211 has space to allow the first transmission gear 404 to move in the vertical direction, so that the tensioning mechanism 300 is not restricted by the inner cavity of the fixing part 211 when it floats in the vertical direction. Furthermore, the height of the first transmission gear 404 is greater than the height of the slot 2111, so that the first transmission gear always maintains at least a portion of its engagement with the second transmission gear 403 when it floats in the vertical direction with the tensioning mechanism 300.

[0057] To measure the height of the top of the gear shaft, this measuring device also includes a contact plate 230 connected to the bracket 100 and multiple height sensors 501 connected to the top of the contact plate 230. The contact plate 230 has an opening through which the tensioning mechanism 300 passes. The contact plate 230 is positioned above the end of the tensioning mechanism 300 so that after the tensioning mechanism 300 is tensioned and connected to the shaft under test, the bottom of the contact plate 230 abuts against the top surface of the outer ring of the bearing on the shaft under test. When the tensioning mechanism 300 drives the shaft under test to rotate, the contact plate 230 abuts against the outer ring of the bearing, allowing the shaft under test to rotate relative to the contact plate 230. Therefore, the height of the bottom surface of the contact plate 230 is the height of the top surface of the bearing on the shaft under test. Thus, the height data of the top surface of the bearing on the shaft under test is obtained by the height sensors 501 with the contact plate 230 as a reference, thereby determining the height difference between the top surface of the bearing and the gearbox joint surface.

[0058] Through this application, the measuring device and the shaft to be measured are flexibly connected in the vertical direction. Since the weight of the shaft to be measured and the tensioning mechanism can be offset by the floating part, the displacement generated during the tensioning connection process caused by the tensioning mechanism is avoided, thus avoiding the displacement generated during the tensioning connection process caused by the rigid connection between the traditional measuring device and the shaft to be measured, making the measurement more accurate.

[0059] The actual measurement process is as follows:

[0060] First, the measuring device is positioned above the shaft to be measured, aligning the tensioning mechanism 300 with the center hole of the shaft. Then, the end of the tensioning mechanism 300 is switched to a tightened state, for example, by pushing the rod 302 downwards against the repulsive force of the elastic body 306 using the pushing mechanism 204. This causes the pressing part 303 to move downwards within the housing 301 to a position where it will not press against the opening 304, thus switching the end of the tensioning mechanism 300 to a tightened state. Next, the measuring device is lowered so that the end of the tensioning mechanism 300 is inserted into the center hole of the shaft to be measured, and the bottom of the contact plate 230 contacts the top surface of the bearing outer ring of the shaft to be measured. Finally, the end of the tensioning mechanism 300 is switched to an expanded state, for example, by retracting the pushing mechanism 204. The push head 2041 of 04 causes the rod 302 to be subjected to the repulsive force of the elastic body 306, thereby driving the extrusion part 303 in the housing 301 to return to the position of the extrusion opening 304, causing the opening 304 to expand radially outward, so that the tensioning mechanism 300 is tensioned and connected with the shaft to be tested. During the tensioning connection, the upward displacement of the shaft to be tested is offset by the floating of the floating part 210, so that the height of the shaft to be tested remains unchanged. Then, the tensioning mechanism 300 is rotated by the drive mechanism, which drives the shaft to be tested to rotate together. Finally, the height data of the bearing top surface of the shaft to be tested in the rotating state is obtained by the height sensor, and the height difference between the bearing top surface and the gearbox joint surface is obtained by comparing it with the height data of the gearbox joint surface.

[0061] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0062] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0063] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A connecting device, characterized in that, include: The device comprises a support (100), a floating part (210), and a tensioning mechanism (300), wherein the support (100) includes a guide rod (101) extending in a vertical direction, the floating part (210) is mounted on the guide rod (101) and is capable of floating in a vertical direction relative to the guide rod (101), the tensioning mechanism (300) is rotatably mounted on the floating part (210) about a vertical axis, and one end of the tensioning mechanism (300) protrudes from the bottom of the support (100), wherein the end of the tensioning mechanism (300) is capable of switching between an expanded state and a contracted state; the connecting device includes a fixed part (211) fixedly connected to the guide rod (101), and the floating part (210) is floatingly connected to the fixed part (211) through an elastic element (202) so that the connecting device and the shaft to be measured form a flexible connection in the vertical direction.

2. The connecting device according to claim 1, characterized in that, The floating part (210) defines an inner cavity, and the bottom of the floating part (210) has a first opening (2101) communicating with the inner cavity, the tensioning mechanism (300) extends downward through the first opening (2101), and the top of the tensioning mechanism (300) is axially confined within the inner cavity.

3. The connecting device according to claim 1, characterized in that, The fixed part (211) is disposed below the floating part (210) to limit the tensioning mechanism (300), and / or the floating part (210) is connected to the guide rod (101) by a linear bearing (201) sleeved on the guide rod (101).

4. The connecting device according to claim 2, characterized in that, The tensioning mechanism (300) includes a cylindrical housing (301), and one end of the housing (301) includes an opening (304) capable of elastic deformation in the radial direction. Inside the housing (301) is a rod (302) capable of moving vertically relative to the housing (301). The rod (302) includes a compression part (303) whose cross-section protrudes outward relative to the other parts of the rod (302). By moving vertically, the compression part (303) can switch the opening (304) between an expanded state, which is radially expanded due to compression by the compression part (303), and a tightened state, which is restored to its original shape after being released from compression by the compression part (303).

5. The connecting device according to claim 4, characterized in that, The opening (304) includes a tapered tube portion that tapers vertically upwards, and the extrusion portion (303) includes a tapered portion that tapers vertically downwards. The tapered portion can be housed in the tapered tube portion, and the outer wall of the tapered portion is in contact with the inner wall of the tapered tube portion.

6. The connecting device according to claim 5, characterized in that, An elastic body (306) in a compressed state is disposed within the housing (301) surrounding at least a portion of the rod (302). The elastic body (306) abuts against the rod (302) and the housing (301) to cause the rod (302) to tend to move upward relative to the housing (301). The connecting device includes a pushing mechanism (204) capable of pushing the rod (302) downward.

7. The connecting device according to claim 6, characterized in that, The top of the floating part (210) is provided with a second opening (2102) corresponding to the first opening (2101), and the top of the housing (301) is provided with a through hole (307) corresponding to the second opening (2102). The pushing mechanism (204) is installed on the top of the floating part (210), and the pushing mechanism (204) includes a pushing head (2041) that can move vertically relative to the housing (301). The pushing head (2041) is connected to the rod part (302) through the second opening (2102) and the through hole (307).

8. The connecting device according to claim 1, characterized in that, The bracket (100) includes a base plate (103) and a top plate (102), and at least two guide rods (101) are installed between the base plate (103) and the top plate (102). The base plate (103) has a through hole for the tensioning mechanism (300) to pass through.

9. A measuring device, characterized in that, It includes the connecting device as described in any one of claims 1 to 8, and a drive mechanism mounted on the bracket (100), wherein the drive mechanism is capable of driving the tensioning mechanism (300) to rotate.

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