Device and method for measuring axial clearance of back-to-back assembled tapered roller bearing

Abstract

The invention discloses a back-to-back assembly tapered roller bearing axial clearance measuring device and method, and relates to the technical field of bearing detection.The back-to-back assembly tapered roller bearing axial clearance measuring device comprises a positioning counter-force supporting plate, a measured workpiece assembly and a measuring mechanism, the measured workpiece assembly comprises an upper shell, a lower shell and a transmission shaft, and the transmission shaft is provided with a gland close to the upper shell; a measuring mechanism is arranged on the gland; an upper shell and a lower shell are connected through a first mounting bolt to form an accommodating space, tapered roller bearings are mounted on a transmission shaft in a back-to-back manner, a gland, an adjusting pad and a standard pad are utilized to realize initial adjustment of an axial position, and a measuring mechanism realizes automatic control of a measuring process. And measuring the initial height h11 of the gland by taking the second tapered roller bearing as a reference, driving the transmission shaft to simulate the working state of the bearing, adjusting the height of the gland, measuring h12, calculating the axial clearance delta h through a formula, comparing with a standard range, and repeatedly adjusting until the design requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing detection, and specifically to an axial clearance measurement device and method for back-to-back assembled tapered roller bearings. Background Technique

[0002] Back-to-back assembled tapered roller bearings are widely used in various mechanical equipment due to their good load-bearing capacity and rigidity. The axial clearance of the bearings has a decisive impact on the running accuracy, stability, and service life of the equipment. If the axial clearance is too large, it will cause increased vibration and noise during equipment operation, reduce the running accuracy of the equipment, and even lead to faults such as component wear and loosening; if the axial clearance is too small, it may generate heat due to friction, causing the bearing to overheat, accelerating the aging of the bearing, and in severe cases, causing the bearing to jam, affecting the normal operation of the equipment. At present, there are many deficiencies in the traditional methods for measuring the axial clearance of tapered roller bearings. Some measurement methods rely on manual operation and empirical judgment, with low measurement accuracy and poor efficiency, making it difficult to meet the requirements of modern high-precision mechanical manufacturing. Moreover, some automated measurement devices have complex structures, high costs, and there are few special measurement devices for back-to-back assembled tapered roller bearings, which cannot accurately adapt to their unique assembly structure and measurement requirements. Therefore, those skilled in the art have provided an axial clearance measurement device and method for back-to-back assembled tapered roller bearings to solve the problems raised in the above background technique. Summary of the Invention

[0003] The purpose of the present invention is to provide an axial clearance measurement device and method for back-to-back assembled tapered roller bearings to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: An axial clearance measurement device for back-to-back assembled tapered roller bearings, comprising a positioning reaction support plate, a workpiece under test assembly, and a measurement mechanism. A second mounting bolt is detachably provided below the positioning reaction support plate. The workpiece under test assembly includes an upper housing, a lower housing, and a transmission shaft. The positioning reaction support plate is detachably connected to the transmission shaft through the second mounting bolt. The transmission shaft is located between the upper housing and the lower housing. A gland is provided near the upper housing on the transmission shaft, and a second tapered roller bearing is detachably connected to the upper housing through the gland. The measurement mechanism is provided on the upper side of the gland.

[0005] As a further solution of the present invention: The workpiece component to be measured includes a pressing plate, a first input wheel, a first tapered roller bearing, a transmission shaft, a gland, bolts, adjusting pads, a second tapered roller bearing, and a second input wheel. On one side of the upper housing close to the lower housing, first mounting bolts are annularly arranged. The upper housing is detachably connected to the lower housing through the first mounting bolts. On one side of the second mounting bolt close to the lower housing, there is a pressing plate. On one side of the pressing plate, a first input wheel is arranged on the transmission shaft. Between the upper housing and the lower housing, a second input wheel is arranged on the transmission shaft.

[0006] As a further solution of the present invention: On the upper side of the gland, there are bolts. The gland is movably connected to the transmission shaft through the bolts, and an adjusting pad is detachably arranged on the bolts between the gland and the transmission shaft.

[0007] As a further solution of the present invention: The formula for the gap Δh between the transmission shaft and the gland is: ΔL = h12 - h11, Δh = L - ΔL = L - h12 + h11; L is the measured value of the standard pad. h11 is the height of the gland measured with the second tapered roller bearing as the reference. h12 is the height of the gland after being lifted measured with the second tapered roller bearing as the reference.

[0008] As a further solution of the present invention: The measuring mechanism includes a positioning sleeve, a displacement sensor bracket, a displacement sensor, a guide shaft, a return spring, a sliding sleeve, a guide shaft limiting surface, a trigger switch, a guide shaft triggering surface, a lifting ring, a second screw, and a displacement sensor probe. The positioning sleeve is detachably arranged on the upper side of the gland. On both sides of the positioning sleeve, there are displacement sensor brackets. A displacement sensor is installed on the displacement sensor brackets. Below the displacement sensor, there is a displacement sensor probe. On the side of the positioning sleeve away from the gland, there is a sliding sleeve. A guide shaft is slidably connected in the sliding sleeve. The end face of the positioning sleeve has a threaded structure. The side of the guide shaft close to the positioning sleeve has a threaded structure. The threads between the guide shaft and the positioning sleeve are in mutual cooperation.

[0009] As a further solution of the present invention: On the side of the guide shaft away from the positioning sleeve, there is a fixed connection with a guide shaft limiting surface. On the guide shaft limiting surface, there is a fixed connection with a lifting ring. And between the lifting ring and the guide shaft limiting surface, there is a trigger switch. On the side of the guide shaft away from the trigger switch, there is a guide shaft triggering surface.

[0010] As a further solution of the present invention: A return spring is sleeved on the guide shaft between the positioning sleeve and the slide rail. Both ends of the return spring are respectively fixedly connected to the guide shaft and the sliding sleeve. And the positions between the displacement sensor probe and the second tapered roller bearing are in mutual cooperation. And there is a screw in the positioning sleeve, and the screw is in mutual cooperation with the return spring.

[0011] As a further solution of the present invention: The trigger switch is a photoelectric trigger switch, and the trigger switch is electrically connected to the guide shaft limiting surface and the guide shaft triggering surface.

[0012] As a further aspect of the present invention: The displacement sensor is a high-precision linear displacement sensor, which is communicatively connected to an external data processing terminal and is used to transmit measurement data to the external data processing terminal for analysis and storage.

[0013] As a further aspect of the present invention: The displacement sensor bracket is an adjustable bracket, which includes a plurality of telescopic rod segments connected by hinges. Positioning holes and positioning pins are provided on the telescopic rod segments, and the positioning holes and the positioning pins cooperate with each other.

[0014] A method for measuring the axial clearance of a back-to-back assembled tapered roller bearing, comprising the following steps: S1: Install the workpiece component to be measured on the positioning reaction support plate through the second mounting bolt, and fixedly connect the upper housing and the lower housing through the first mounting bolt, and ensure that components such as the transmission shaft, the first tapered roller bearing, and the second tapered roller bearing are installed in place; S2: Adjust the height of the displacement sensor bracket according to the specifications of the workpiece component to be measured, so that the measuring head of the displacement sensor corresponds to the measuring position of the second tapered roller bearing; S3: Taking the end face of the second tapered roller bearing as a reference, select a high-precision measuring tool such as a micrometer or a height gauge, measure the initial height of the gland multiple times and take the average value, record it as h11, and reduce the measurement error; S4: When the sliding sleeve moves to the position where the guide shaft trigger surface contacts the photoelectric trigger switch, blocking the light path, the trigger switch generates an electrical signal to start the displacement sensor, and is ready to collect data. Drive the transmission shaft to rotate through the first input wheel and the second input wheel, so that the first tapered roller bearing and the second tapered roller bearing simulate the operation under the actual working conditions; S5: The displacement sensor measures the axial displacement of the second tapered roller bearing in real time and transmits the measurement data to the external data processing terminal; S6: After the measurement is completed, according to the formula ΔL = h12 - h11, calculate the displacement ΔL of the gland elevation. Given the measured value ΔL of the standard pad, and then according to the formula Δh = L - ΔL = L - h12 + h11, accurately calculate the clearance Δh between the transmission shaft and the gland. The external data processing terminal analyzes the calculated axial clearance Δh and compares it with the pre-set standard clearance range.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The upper housing and the lower housing are annularly connected by the first mounting bolts, with the transmission shaft positioned between the upper housing and the lower housing to form a spatial structure for accommodating components such as bearings. On the transmission shaft, the first tapered roller bearing and the second tapered roller bearing are mounted back-to-back. A gland is mounted on the side close to the upper housing. The gland is movably connected to the transmission shaft by the bolts on the gland, and an adjusting pad is mounted on the bolts. The function of the adjusting pad is to preliminarily adjust the relative position between the transmission shaft and the gland, preparing for subsequent precise measurement and clearance adjustment. At the same time, a pressing plate is mounted on the side of the second mounting bolt close to the lower housing, and a first input wheel and a second input wheel are mounted on the transmission shaft. The first input wheel and the second input wheel are used to simulate the actual working state of the bearing subsequently and provide rotational power for the transmission shaft. 2. In the initial state, with the second tapered roller bearing as the reference, use a measuring tool to measure the height of the gland and record it as h11. Subsequently, drive the transmission shaft to rotate through the first input wheel and the second input wheel to simulate the actual working state of the bearing. During this process, according to actual requirements, the gland can be lifted by adjusting the thickness of the adjusting pad or other means. Again, with the second tapered roller bearing as the reference, measure the height of the gland after it is lifted and record it as h12. According to the formula ΔL = h12 - h11, calculate the displacement ΔL of the gland lift. Here, L is the measured value of the standard pad, and the standard pad is a fixed size determined according to the design requirements and is used as a measurement reference. Then, according to the formula Δh = L - ΔL = L - h12 + h11, calculate the clearance Δh between the transmission shaft and the gland. This clearance Δh reflects the axial clearance of the back-to-back assembled tapered roller bearings in the current assembly state. Compare the calculated clearance Δh with the standard clearance range required by the design. If Δh is not within the standard range, replace the adjusting pads with different thicknesses and measure and calculate again until the clearance Δh between the transmission shaft and the gland meets the design requirements. After the adjustment is completed, the measurement process can be repeated to verify whether the axial clearance is stably within the standard range, ensuring the assembly accuracy of the back-to-back assembled tapered roller bearings and the normal operation of the equipment. 3. Adjust the displacement sensor bracket according to the specifications and measurement requirements of the workpiece to be measured. Since the displacement sensor bracket is an adjustable bracket, the probe of the displacement sensor can be accurately aligned with the measurement position of the second tapered roller bearing. The operator pulls the sliding sleeve to drive the guide shaft to move. When the sliding sleeve moves to the point where the trigger surface of the guide shaft contacts the trigger switch, since the trigger switch is a photoelectric trigger switch and its optical path is blocked, the trigger switch generates an electrical signal. This signal marks the start of the measurement process. Start the external power source, drive the transmission shaft to rotate through the first input wheel and the second input wheel, so that the first tapered roller bearing and the second tapered roller bearing simulate the operation under actual working conditions. During the operation of the bearings, the bearings will generate axial displacement. The probe of the displacement sensor contacts the second tapered roller bearing. When the bearing generates axial displacement, the probe of the displacement sensor will move accordingly. The high-precision linear displacement sensor converts the displacement of the probe into an electrical signal and transmits the measurement data to the external data processing terminal through the communication connection. After receiving the data transmitted by the displacement sensor, the external data processing terminal analyzes and processes the data, calculates the axial clearance of the back-to-back assembled tapered roller bearings, and can judge whether the axial clearance of the bearings meets the requirements by comparing with the preset standard value. When the measurement is completed, under the action of the return spring, the sliding sleeve slides along the guide shaft and returns to the initial position. The two ends of the return spring are respectively fixedly connected to the guide shaft and the sliding sleeve, and the screw in the positioning sleeve cooperates with the return spring to ensure the stability of the spring during the stretching and contracting process and provide reliable power for the return of the sliding sleeve. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an axial clearance measuring device for back-to-back assembled tapered roller bearings.

[0017] Figure 2 It is a front view of the workpiece assembly to be measured in an axial clearance measuring device and method for back-to-back assembled tapered roller bearings.

[0018] Figure 3 It is Figure 2 The sectional structural schematic diagram in the A-A direction of

[0019] Figure 4 It is a detection shaft system diagram of the workpiece assembly to be measured in an axial clearance measuring device for back-to-back assembled tapered roller bearings.

[0020] Figure 5 It is a non-padded measurement diagram of the workpiece assembly to be measured in an axial clearance measuring device for back-to-back assembled tapered roller bearings.

[0021] Figure 6 It is a measurement diagram with a standard pad added to the workpiece assembly to be measured in an axial clearance measuring device for back-to-back assembled tapered roller bearings.

[0022] Figure 7 is Figure 6 a partially enlarged structural schematic diagram of A in

[0023] In the figure: 1. Positioning reaction force support plate; 2. Workpiece under test assembly; 201. Upper housing; 202. Lower housing; 203. Pressure plate; 204. First input wheel; 205. First tapered roller bearing; 206. Transmission shaft; 207. gland; 208. Bolt; 209. Adjusting pad; 210. Second tapered roller bearing; 211. Second input wheel; 3. Measuring mechanism; 301. Positioning sleeve; 302. Displacement sensor bracket; 303. Displacement sensor; 304. Guide shaft; 305. Return spring; 306. Sliding sleeve; 307. Guide shaft limiting surface; 308. Trigger switch; 309. Guide shaft triggering surface; 310. Hoisting ring; 311. Screw; 312. Displacement sensor probe; 4. First mounting bolt; 5. Second mounting bolt; 6. Standard pad. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1

[0026] Referring to Figures 1 - 7 , this embodiment provides an axial clearance measuring device for back-to-back assembled tapered roller bearings, including a positioning reaction force support plate 1, a workpiece under test assembly 2, and a measuring mechanism 3. A second mounting bolt 5 is detachably provided below the positioning reaction force support plate 1. The workpiece under test assembly 2 includes an upper housing 201, a lower housing 202, and a transmission shaft 206. The positioning reaction force support plate 1 is detachably connected to the transmission shaft 206 through the second mounting bolt 5. The transmission shaft 206 is located between the upper housing 201 and the lower housing 202. A gland 207 is provided near the upper housing 201 on the transmission shaft 206, and a second tapered roller bearing 210 is detachably provided on the upper housing 201 through the gland 207. A measuring mechanism 3 is provided on the upper side of the gland 207; In this embodiment, specifically, the workpiece component 2 to be measured includes a pressing plate 203, a first input wheel 204, a first tapered roller bearing 205, a transmission shaft 206, a gland 207, bolts 208, an adjusting pad 209, a second tapered roller bearing 210, and a second input wheel 211. On one side of the upper housing 201 close to the lower housing 202, first mounting bolts 4 are annularly arranged. The upper housing 201 is detachably connected to the lower housing 202 through the first mounting bolts 4. On one side of the second mounting bolt 5 close to the lower housing 202, there is a pressing plate 203. On one side of the pressing plate 203, a first input wheel 204 is arranged on the transmission shaft 206. Between the upper housing 201 and the lower housing 202, a second input wheel 211 is arranged on the transmission shaft 206; On the upper side of the gland 207, there are bolts 208. The gland 207 is movably connected to the transmission shaft 206 through the bolts 208, and an adjusting pad 209 is detachably arranged on the bolts 208 between the gland 207 and the transmission shaft 206; The formula for the clearance Δh between the transmission shaft 206 and the gland 207 is: ΔL = h22 - h11, Δh = L - ΔL = L - h22 + h11; L is the measured value of the standard pad 6. h11 is the height of the gland 207 measured with the second tapered roller bearing 210 as the reference. h12 is the height of the gland 207 after being lifted, measured with the second tapered roller bearing 210 as the reference; The upper housing 201 and the lower housing 202 are annularly connected through the first mounting bolts 4, so that the transmission shaft 206 is located between the upper housing 201 and the lower housing 202, forming a space structure for accommodating components such as bearings. On the transmission shaft 206, the first tapered roller bearing 205 and the second tapered roller bearing 210 are mounted back to back. The gland 207 is mounted on the side close to the upper housing 201. The gland 207 is movably connected to the transmission shaft 206 by using the bolts 208 on the gland 207, and the adjusting pad 209 is mounted on the bolts 208. The function of the adjusting pad 209 is to preliminarily adjust the relative position between the transmission shaft 206 and the gland 207, preparing for subsequent precise measurement and adjustment of the clearance. At the same time, on one side of the second mounting bolt 5 close to the lower housing 202, a pressing plate 203 is mounted. The first input wheel 204 and the second input wheel 211 are mounted on the transmission shaft 206. The first input wheel 204 and the second input wheel 211 are used to simulate the actual working state of the bearing subsequently, providing rotational power for the transmission shaft 206; In the initial measurement state, with the second tapered roller bearing 210 as the reference, use a measuring tool (such as a height gauge, etc.) to measure the height of the gland 207, and record it as h11. Subsequently, drive the transmission shaft 206 to rotate through the first input wheel 204 and the second input wheel 211 to simulate the actual working state of the bearing. During this process, according to actual requirements, the gland 207 can be lifted by adjusting the thickness of the adjusting pad 209 or other means. Again, with the second tapered roller bearing 210 as the reference, measure the height of the gland 207 after it is lifted, and record it as h22. According to the formula ΔL = h22 - h11, calculate the displacement ΔL of the gland 207 being lifted. Among them, L is the measured value of the standard pad 6, and the standard pad 6 is a fixed size determined according to the design requirements and is used as a measurement reference. Then, according to the formula Δh = L - ΔL = L - h22 + h11, calculate the clearance Δh between the transmission shaft 206 and the gland 207. This clearance Δh reflects the axial clearance situation of the back-to-back assembled tapered roller bearing in the current assembly state. Compare the calculated clearance Δh with the standard clearance range required by the design. If Δh is not within the standard range, by replacing the adjusting pad 209 with different thicknesses, measure and calculate again until the clearance Δh between the transmission shaft 206 and the gland 207 meets the design requirements. After the adjustment is completed, the measurement process can be repeated to verify whether the axial clearance is stably within the standard range to ensure the assembly accuracy of the back-to-back assembled tapered roller bearing and the normal operation of the equipment.

[0027] Embodiment 2

[0028] Refer to Figures 1 - 3 , this embodiment is based on the previous embodiment. The difference from the previous embodiment is that the measuring mechanism 3 includes a positioning sleeve 301, a displacement sensor bracket 302, a displacement sensor 303, a guide shaft 304, a return spring 305, a sliding sleeve 306, a guide shaft limiting surface 307, a trigger switch 308, a guide shaft triggering surface 309, a lifting ring 310, a screw 311 and a displacement sensor probe 312. A positioning sleeve 301 is detachably installed on the upper side of the gland 207. Displacement sensor brackets 302 are arranged on both sides of the positioning sleeve 301. A displacement sensor 303 is installed on the displacement sensor bracket 302. A displacement sensor probe 312 is arranged below the displacement sensor 303. A sliding sleeve 306 is arranged on the side of the positioning sleeve 301 away from the gland 207. A guide shaft 304 is slidably connected in the sliding sleeve 306. The end face of the positioning sleeve 301 has a threaded structure, and the side of the guide shaft 304 close to the positioning sleeve 301 has a threaded structure, and the threads between the guide shaft 304 and the positioning sleeve cooperate with each other; A guide shaft limiting surface 307 is fixedly connected to the side of the guide shaft 304 away from the positioning sleeve 301. A lifting ring 310 is fixedly connected to the limiting surface of the guide shaft 304, and a trigger switch 308 is arranged between the lifting ring 310 and the guide shaft limiting surface 307. A guide shaft triggering surface 309 is arranged on the side of the guide shaft 304 away from the trigger switch 308; A return spring 305 is sleeved on the guide shaft 304 between the positioning sleeve 301 and the slide rail. The two ends of the return spring 305 are respectively fixedly connected to the guide shaft 304 and the sliding sleeve 306. The position between the probe of the displacement sensor 303 and the second tapered roller bearing 210 is matched with each other. A screw 311 is arranged in the positioning sleeve 301, and the screw 311 is matched with the return spring 305; The trigger switch 308 is a photoelectric trigger switch 308, and the trigger switch 308 is electrically connected to the guide shaft limit surface 307 and the guide shaft trigger surface 309; The displacement sensor 303 is a high-precision linear displacement sensor 303. The displacement sensor 303 is communicatively connected to an external data processing terminal and is used to transmit measurement data to the external data processing terminal for analysis and storage; The displacement sensor bracket 302 is an adjustable bracket, which includes a plurality of telescopically connected rod sections connected by hinges. Positioning holes and positioning pins are arranged on the telescopically connected rod sections, and the positioning holes are matched with the positioning pins; The positioning sleeve 301 of the measuring mechanism 3 is detachably installed on the upper side of the gland 207 to complete the preliminary setup of the entire device. According to the specifications and measurement requirements of the workpiece to be measured, the displacement sensor bracket 302 is adjusted. Since the displacement sensor bracket 302 is an adjustable bracket, the displacement sensor probe 312 can be accurately aligned with the measurement position of the second tapered roller bearing 210. The operator pulls the sliding sleeve 306 to drive the guide shaft 304 to move. When the sliding sleeve 306 moves to the point where the guide shaft trigger surface 309 contacts the trigger switch 308, since the trigger switch 308 is a photoelectric trigger switch 308 and its optical path is blocked, the trigger switch 308 generates an electrical signal. This signal marks the start of the measurement process. The external power source is started, and the drive shaft 206 is driven to rotate through the first input wheel 204 and the second input wheel 211, so that the first tapered roller bearing 205 and the second tapered roller bearing 210 simulate the operation under actual working conditions. During the operation of the bearing, the bearing will generate an axial displacement. The displacement sensor probe 312 contacts the second tapered roller bearing 210. When the bearing generates an axial displacement, the probe of the displacement sensor 303 will move accordingly. The high-precision linear displacement sensor 303 converts the displacement of the probe into an electrical signal and transmits the measurement data to the external data processing terminal through a communication connection. After receiving the data transmitted by the displacement sensor 303, the external data processing terminal analyzes and processes the data, calculates the axial clearance of the back-to-back assembled tapered roller bearing, and can determine whether the axial clearance of the bearing meets the requirements by comparing it with the preset standard value. When the measurement is completed, under the action of the return spring 305, the sliding sleeve 306 slides along the guide shaft 304 and returns to the initial position. The two ends of the return spring 305 are respectively fixedly connected to the guide shaft 304 and the sliding sleeve 306, and the screw 311 in the positioning sleeve 301 cooperates with the return spring 305 to ensure the stability of the spring during the expansion and contraction process and provide reliable power for the return of the sliding sleeve 306.

[0029] Embodiment 3

[0030] A method for measuring the axial clearance of a back-to-back assembled tapered roller bearing, comprising the following steps: S1: Install the workpiece assembly 2 to be measured on the positioning reaction support plate 1 through the second mounting bolt 5, and fixedly connect the upper housing 201 and the lower housing 202 through the first mounting bolt 4, and ensure that components such as the drive shaft 206, the first tapered roller bearing 205, and the second tapered roller bearing 210 are installed in place; S2: Adjust the height of the displacement sensor bracket 302 according to the specifications of the workpiece assembly 2 to be measured, so that the probe of the displacement sensor 303 corresponds to the measurement position of the second tapered roller bearing 210; S3: Taking the end face of the second tapered roller bearing 210 as the reference, select a micrometer or height gauge, a high-precision measuring tool, measure the initial height of the gland 207 multiple times and take the average value, record it as h11, and reduce the measurement error; S4: When the sliding sleeve 306 moves to the position where the guide shaft trigger surface 309 contacts the photoelectric trigger switch 308, blocking the light path, the trigger switch 308 generates an electrical signal, activates the displacement sensor 303, prepares to collect data, and drives the transmission shaft 206 to rotate through the first input wheel 204 and the second input wheel 211, so that the first tapered roller bearing 205 and the second tapered roller bearing 210 simulate the operation in the actual working state; S5: The displacement sensor 303 measures the axial displacement of the second tapered roller bearing 210 in real time and transmits the measurement data to an external data processing terminal; S6: After the measurement is completed, according to the formula ΔL = h22 - h11, calculate the displacement ΔL of the elevation of the gland 207. Given the measured value ΔL of the standard pad 6, and then according to the formula Δh = L - ΔL = L - h22 + h11, accurately calculate the gap Δh between the transmission shaft 206 and the gland 207. The external data processing terminal analyzes the calculated axial gap Δh and compares it with the pre-set standard gap range.

[0031] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An axial clearance measuring device for back-to-back assembled tapered roller bearings, characterized in that, It includes a positioning reaction force support plate (1), a workpiece under test assembly (2), and a measuring mechanism (3). A second mounting bolt (5) is detachably arranged below the positioning reaction force support plate (1). The workpiece under test assembly (2) includes an upper housing (201), a lower housing (202), and a transmission shaft (206). The positioning reaction force support plate (1) is detachably connected to the transmission shaft (206) through the second mounting bolt (5). The transmission shaft (206) is located between the upper housing (201) and the lower housing (202). A gland (207) is arranged on the transmission shaft (206) close to the upper housing (201). And the upper housing (201) is detachably connected to a second tapered roller bearing (210) through the gland (207). A measuring mechanism (3) is arranged on the upper side of the gland (207). The workpiece under test assembly (2) includes a pressing plate (203), a first input wheel (204), a first tapered roller bearing (205), a transmission shaft (206), a gland (207), a bolt (208), an adjusting pad (209), a second tapered roller bearing (210), and a second input wheel (211). A first mounting bolt (4) is annularly arranged on one side of the upper housing (201) close to the lower housing (202). The upper housing (201) is detachably connected to the lower housing (202) through the first mounting bolt (4). A pressing plate (203) is arranged on one side of the second mounting bolt (5) close to the lower housing (202). A first input wheel (204) is arranged on the transmission shaft (206) on one side of the pressing plate (203). A second input wheel (211) is arranged on the transmission shaft (206) between the upper housing (201) and the lower housing (202).

2. The axial clearance measuring device for back-to-back assembled tapered roller bearings according to claim 1, characterized in that, A bolt (208) is arranged on the upper side of the gland (207). The gland (207) is movably connected to the transmission shaft (206) through the bolt (208). And an adjusting pad (209) and a standard pad (6) are detachably arranged on the bolt (208) between the gland (207) and the transmission shaft (206).

3. The axial clearance measuring device for back-to-back assembled tapered roller bearings according to claim 2, characterized in that, The measuring mechanism (3) includes a positioning sleeve (301), a displacement sensor bracket (302), a displacement sensor (303), a guide shaft (304), a return spring (305), a sliding sleeve (306), a guide shaft limiting surface (307), a trigger switch (308), a guide shaft triggering surface (309), a lifting ring (310), a screw (311), and a displacement sensor probe (312). A positioning sleeve (301) is detachably arranged on the upper side of the gland (207). Displacement sensor brackets (302) are arranged on both sides of the positioning sleeve (301). A displacement sensor (303) is installed on the displacement sensor brackets (302). A displacement sensor probe (312) is arranged below the displacement sensor (303). A sliding sleeve (306) is arranged on the side of the positioning sleeve (301) away from the gland (207). A guide shaft (304) is slidably connected in the sliding sleeve (306). The end face of the positioning sleeve (301) is of a threaded structure. The side of the guide shaft (304) close to the positioning sleeve (301) is of a threaded structure. The threads between the guide shaft (304) and the positioning sleeve cooperate with each other.

4. A back-to-back assembled tapered roller bearing axial clearance measuring device according to claim 3, characterized in that, On one side of the guide shaft (304) far from the positioning sleeve (301), a guide shaft limiting surface (307) is fixedly connected. A lifting ring (310) is fixedly connected to the limiting surface of the guide shaft (304), and a trigger switch (308) is arranged between the lifting ring (310) and the guide shaft limiting surface (307). On the side of the guide shaft (304) far from the trigger switch (308), a guide shaft trigger surface (309) is provided.

5. The axial clearance measuring device for back-to-back assembled tapered roller bearings according to claim 4, characterized in that, A return spring (305) is sleeved on the guide shaft (304) between the positioning sleeve (301) and the slide rail. The two ends of the return spring (305) are respectively fixedly connected to the guide shaft (304) and the sliding sleeve (306). The position between the probe of the displacement sensor (303) and the second tapered roller bearing (210) is mutually matched. And a screw (311) is arranged in the positioning sleeve (301), and the screw (311) is mutually matched with the return spring (305).

6. The axial clearance measuring device for back-to-back assembled tapered roller bearings according to claim 5, characterized in that, The trigger switch (308) is a photoelectric trigger switch (308), and the trigger switch (308) is electrically connected between the guide shaft limiting surface (307) and the guide shaft trigger surface (309).

7. An axial clearance measuring device for back-to-back assembled tapered roller bearings according to claim 6, characterized in that The displacement sensor (303) is a high-precision linear displacement sensor (303). The displacement sensor (303) is communicatively connected to an external data processing terminal, and is used for transmitting measurement data to the external data processing terminal for analysis and storage.

8. The axial clearance measuring device for back-to-back assembled tapered roller bearings according to claim 7, characterized in that, The displacement sensor bracket (302) is an adjustable bracket, which includes a plurality of telescopic rod joints connected by hinges. Positioning holes and positioning pins are arranged on the telescopic rod joints, and the positioning holes and the positioning pins are mutually matched.

9. A back-to-back assembled tapered roller bearing axial clearance measuring device according to claim 2, characterized in that, The formula for the clearance Δh between the transmission shaft (206) and the gland (207) is: ΔL = h22 - h11, Δh = L - ΔL = L - h22 + h11 L is the measured value of the standard pad (6), h11 is the height of the gland (207) measured with the second tapered roller bearing (210) as the reference, and h12 is the height of the gland (207) after being lifted measured with the second tapered roller bearing (210) as the reference.

10. A method for an axial clearance measuring device of a back-to-back assembled tapered roller bearing according to any one of claims 1-9, characterized in that, It includes the following steps: S1: Install the workpiece component to be measured (2) on the positioning reaction support plate (1) through the second mounting bolt (5), and fixedly connect the upper housing (201) and the lower housing (202) through the first mounting bolt (4), and ensure that the transmission shaft (206), the first tapered roller bearing (205), and the second tapered roller bearing (210) are installed in place; S2: According to the specifications of the workpiece component to be measured (2), adjust the height of the displacement sensor bracket (302) so that the probe of the displacement sensor (303) corresponds to the measurement position of the second tapered roller bearing (210); S3: Taking the end face of the second tapered roller bearing (210) as the reference, select a high-precision measuring tool such as a dial indicator or a height gauge, measure the initial height of the gland (207) multiple times and take the average value, and record it as h11 to reduce the measurement error; S4: When the sliding sleeve (306) moves to the point where the guide shaft trigger surface (309) contacts the photoelectric trigger switch (308), blocking the light path, the trigger switch (308) generates an electrical signal to start the displacement sensor (303) and prepare for data acquisition. The drive shaft (206) is rotated by the first input wheel (204) and the second input wheel (211) to make the first tapered roller bearing (205) and the second tapered roller bearing (210) simulate the operation under actual working conditions; S5: The displacement sensor (303) measures the axial displacement of the second tapered roller bearing (210) in real time and transmits the measurement data to an external data processing terminal; S6: After the measurement is completed, according to the formula ΔL = h12 - h11, the displacement ΔL of the gland (207) being raised is calculated. Given the measured value ΔL of the standard gasket (6), and then based on the formula Δh = L - ΔL = L - h22 + h11, the clearance Δh between the drive shaft (206) and the gland (207) is accurately calculated. The external data processing terminal analyzes the calculated axial clearance Δh and compares it with the pre-set standard clearance range.

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