A device for detecting axial clearance of inner ring of bearing

Abstract

The present invention provides a bearing inner ring axial clearance detection device, which belongs to the field of mechanical processing technology. The present invention can quickly and accurately measure the bearing inner ring axial clearance, and prevent unqualified products from flowing to the next process. The structure of the present invention is easy to manufacture, has no complex structural parts, and has a low manufacturing cost. At the same time, the present invention has a simple principle and is easy to operate. It only needs to use two dynamometers and micrometers to quickly complete the measurement of the bearing axial clearance, and the measurement result is accurate, which can meet efficient processing and is suitable for mass production.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing and relates to a bearing inner ring axial clearance detection device. Background Art

[0002] Self-lubricating spherical bearings have the advantages of simple structure, strong load-bearing capacity, wide temperature range, and no need to add lubricants during service. They are widely used in the manufacture of key parts such as landing gear, wings, doors, and hydraulic, fuel and oxygen supply systems in the aviation field, playing an important role in load bearing and motion transmission. The present invention relates to a spherical bearing, such as Figure 1 a and Figure 1 As shown in b, during the installation process, the bearing adopts the "six-point positioning" and related operations according to the provisions of HB 0-37-2003 "Installation and Fixing of Bearings". After the bearing is fixed on the bracket, when it reaches the qualified product state, the bearing should rotate flexibly. One of the inspections involves the axial movement of the inner ring of the bearing relative to the outer ring of the bearing under the action of a force of 49N, that is, the axial clearance meets the requirements of 0.03-0.1mm. Figure 2 As shown in , a 49N force perpendicular to the bearing end face is applied to the bearing. Under the action of the 49N force in opposite directions, one end face of the bearing moves from position A to position A'. The distance L between A and A' is the axial clearance. In order to accurately measure the axial clearance of the bearing after installation and fixation, a certain auxiliary measuring device must be used. For this purpose, the present invention designs a device that can quickly detect the axial clearance of the inner ring of the bearing. The device can quickly and accurately measure the axial clearance of the inner ring of the bearing to prevent unqualified products from flowing to the next process. Summary of the invention

[0003] The purpose of the present invention is to provide a bearing inner ring axial clearance detection device to solve the above problems existing in the prior art.

[0004] The technical solution adopted by the present invention is:

[0005] A device for detecting the axial clearance of the inner ring of a bearing, the device comprising a base 1, a support plate 2, a slideway 3, a slider 4, a side plate 5, a handle 6, a pull rod 7, a dynamometer 8, a bayonet 9, a micrometer support 10, an L-shaped pressure plate 11, a clamping bolt 12, a support sleeve 13, a shaft 14, a push plate 15, a micrometer 16, a cotter pin 17 and a clamping nut 18.

[0006] The base 1 is a rectangular plate, which serves as a mounting and measuring platform for the detection device and plays a supporting role. A plurality of threaded holes are provided on the base for connecting related components.

[0007] The support plate 2 is fixedly mounted on the base 1 and is positioned near the middle of the base 1. A through hole 2-2 and a threaded hole 2-3 for installing a clamping bolt 12 are provided on the side of the support plate 2. A threaded hole 2-1 is provided on the top of the support plate 2 for installing a micrometer support 10.

[0008] The micrometer support 10 is fixedly connected to the threaded hole 2 - 1 at the top of the support plate 2 , and is used to support the micrometer 16 and adjust the measuring position of the micrometer 16 .

[0009] The micrometer 16 is detachably mounted on the micrometer support 10 , and the push rod of the micrometer 16 is parallel to the base 1 .

[0010] The support sleeve 13 is a tubular structure with a stepped appearance. Its small diameter end is inserted into the through hole 2-2 of the support plate 2 until the step of the support sleeve 13 abuts against the surface of the support plate 2. The small diameter section of the support sleeve 13 is tightly fitted with the through hole 2-2. The end face of the large diameter end of the support sleeve 13 is set to be sunken, and the inner diameter of the end face of the large diameter end is larger than the outer ring of the bearing, so as to maintain sufficient movement of the inner ring of the bearing on the bracket to be tested.

[0011] The shaft 14 is a stepped shaft, and holes for connecting to the dynamometer 8 are respectively provided at both ends thereof. The large diameter end of the shaft 14 passes through the large diameter end of the support sleeve 13, passes through the small diameter end of the support sleeve 13, and also passes through the support plate 2. The large diameter end of the shaft 14 is precisely matched with the inner hole of the support sleeve 13; the small diameter end of the shaft 14 extends out of the large diameter end of the support sleeve 13, and the middle section is provided with a thread for matching with the clamping nut 18.

[0012] The push plate 15 is fixedly mounted on the large diameter end of the shaft 14 passing through the support plate 2, and a large distance is left from the support plate 2 to prevent the push plate 15 from colliding with the support plate 2 when the push plate 15 and the shaft 14 move; the height of the push plate 15 is higher than the height of the support plate 2, and the raised part contacts the end of the push rod of the micrometer 16, which is used to push the push rod of the micrometer 16 to detect the moving clearance of the shaft 14.

[0013] The vertical plate of the L-shaped pressure plate 11 is installed on the support plate 2 next to the large diameter end of the support sleeve 13, and its horizontal plate cooperates with the end face of the large diameter end of the support sleeve 13, and is used to clamp the bracket to be tested. The clamping bolt 12 passes through the horizontal plate of the L-shaped pressure plate 11 and is screwed into the threaded hole 2-3 on the support plate 2. The L-shaped pressure plate 11 and the clamping bolt 12 constitute a clamping device, which presses the bracket to be tested on the support plate 2 to prevent it from moving during the measurement process and causing measurement errors; the horizontal plate of the L-shaped pressure plate 11 is provided with a U-shaped groove, and the notch of the U-shaped groove is larger than the outer ring of the bearing on the bracket to be tested, so that the L-shaped pressure plate 11 is pressed on the bracket where the outer ring of the bearing is located.

[0014] During installation, the inner hole of the inner ring of the bearing of the bracket to be tested is inserted into the small diameter end of the shaft 14 until one side of the inner ring of the bearing rests on the step of the shaft 14. The clamping nut 18 is tightened on the thread of the middle section of the small diameter section of the shaft 14 from the other side of the inner ring of the bearing. The inner ring of the bearing of the bracket to be tested is pressed between the step of the shaft 14 and the clamping nut 18, so that the inner ring of the bearing and the shaft 14 can move together.

[0015] The slide 3 is L-shaped, with a total of four, each group of two symmetrically distributed at both ends of the support plate 2, the two slides 3 in each group are placed opposite to each other and symmetrically distributed on the edges of both sides of the base 1, and the vertical plate of the slide 3 is connected to the base 1 through a number of bolts, so that a slide is formed between its horizontal plate and the base 1, which is used to ensure that the slider 4 slides along the length direction of the base 1.

[0016] The slider 4 is a T-shaped slider, two of which are provided, and the upper end surface thereof is provided with a blind hole 4-1 and a notch 4-3 perpendicular to the sliding direction, and the side wall of the notch 4-3 is provided with a hole 4-2 for the pull rod 7 to pass through. The two sliders 4 are symmetrically placed outward on one side with the hole 4-2, and their lower ends are respectively inserted into the slides formed by the two groups of slides 3.

[0017] One end of the two dynamometers 8 is respectively hooked in the holes at both ends of the shaft 14, and the other end is connected to the blind hole 4-1 at the top of the slider 4 through the bayonet 9, so as to measure the forces on both sides of the inner ring of the bearing.

[0018] The two side panels 5 are symmetrically distributed on the outside of the two slideways 3 and fixedly connected to the base 1. They are provided with threaded through holes. The two pull rods 7 pass through the threaded through holes from the outside respectively, and cooperate with the side panels 5 through threads; the tail ends of the two pull rods 7 are respectively fixedly connected with handles 6 for screwing the pull rods 7. After the front ends of the two pull rods 7 pass through the holes 4-2 of the slider 4 and enter the notch 4-3, they are connected to the pull rods 7 through the cotter pins 17. By screwing the handles 6, the pull rods 7 can drive the slider 4 to slide.

[0019] Furthermore, the base 1 is made of steel.

[0020] The steps for using a bearing inner ring axial clearance detection device are as follows:

[0021] 1) Install the bracket to be tested on the detection device. At this time, the support sleeve 13 is inserted into the through hole 2-2 of the support plate 2, and one side end face of the bearing inner ring is attached to the large diameter end face of the support sleeve 13. The small diameter end of the shaft 14 passes through the inner hole of the support sleeve 13 and the inner hole of the bearing inner ring; the clamping nut 18 passes through the small diameter end of the shaft 14 and is tightened on the thread of the small diameter end of the shaft 14 to fix the bearing inner ring to the shaft 14; the L-shaped pressure plate 11 is pressed on the bracket where the bearing outer ring is located, and is tightened with the clamping bolt 12 to complete the fixation of the shaft 14 and the parts.

[0022] 2) Hang the hook at one end of the dynamometer 8 on one side on the hole of the shaft 14 on that side, and connect the other end to the slider 4 on that side through the bayonet 9. The dynamometer 8 on the other side is not installed yet.

[0023] 3) By rotating the handle 6 on one side, the pull rod 7, slider 4, dynamometer 8, shaft 14, push plate 15 and bearing inner ring on that side are driven to move toward the side plate 5 on that side. At this time, observe the indication of the dynamometer 8 on that side. When the indication of the dynamometer 8 reaches 49N, push the push rod of the micrometer 16 against the push plate 15 at this time, and set the micrometer 16 to zero. At this time, the bearing inner ring is in position A.

[0024] 4) Hang the hook at one end of the dynamometer 8 on the other side on the hole on the side of the shaft 14, and connect the other end to the slider 4 on the side through the bayonet 9. By rotating the handle 6 on the other side, drive the pull rod 7, slider 4, dynamometer 8, shaft 14, and push plate 15 on the other side. At this time, observe the reading of the dynamometer 8 on the other side. When the reading of the dynamometer 8 reaches 2 times 49N, the inner ring of the bearing is in the A' position. Read the reading of the micrometer 16 at this time, which is the axial clearance L of the inner ring of the bearing. When L is 0.03-0.1mm, the bearing assembly is qualified.

[0025] Beneficial effects of the present invention:

[0026] 1. The structure of the present invention is easy to manufacture, has no complicated structural parts, and has a low manufacturing cost;

[0027] 2. The present invention has a simple principle and is easy to operate. It only requires two dynamometers and a micrometer to quickly measure the axial clearance of the bearing. The measurement result is accurate, can meet the requirements of efficient processing, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the part to be processed, where a is the main view and b is the top view.

[0029] Figure 2 This is the principle diagram of measuring the axial clearance of the bearing inner ring. In the figure, A and A' are the maximum displacement positions on both sides of the bearing under the axial force of 49N, and L is the axial clearance.

[0030] Figure 3 This is the front view of the bearing inner ring axial clearance detection device.

[0031] Figure 4 This is the axonometric view of the bearing inner ring axial clearance detection device.

[0032] Figure 5 This is a structural diagram of the supporting casing.

[0033] Figure 6 This is the structural diagram of the axis.

[0034] Figure 7 Schematic diagram of the support plate structure.

[0035] Figure 8 This is a schematic diagram of the slider structure.

[0036] In the figure: 1 base; 2 support plate; 3 slideway; 4 slider; 5 side plate; 6 handle; 7 pull rod; 8 dynamometer; 9 bayonet pin; 10 micrometer support; 11 L-shaped pressure plate; 12 clamping bolt; 13 support sleeve; 14 shaft; 15 push plate; 16 micrometer; 17 cotter pin; 18 clamping nut; 2-1 threaded hole; 2-2 through hole; 2-3 threaded hole; 4-1 blind hole; 4-2 hole; 4-3 notch. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with specific embodiments.

[0038] Example

[0039] like Figure 3 , Figure 4 As shown, a bearing inner ring axial clearance detection device includes a base 1, a support plate 2, a slideway 3, a slider 4, a side plate 5, a handle 6, a pull rod 7, a dynamometer 8, a bayonet 9, a micrometer support 10, an L-shaped pressure plate 11, a clamping bolt 12, a support sleeve 13, a shaft 14, a push plate 15, a micrometer 16, a cotter pin 17 and a clamping nut 18.

[0040] The base 1 is a rectangular plate made of steel material, serving as a mounting and measuring platform for the detection device and playing a supporting role. A number of threaded holes are provided on the base for related components.

[0041] like Figure 7 As shown, the support plate 2 is fixedly mounted on the base 1 and is positioned near the middle of the base 1. A through hole 2-2 and a threaded hole 2-3 for installing a clamping bolt 12 are provided on the side of the support plate 2. A threaded hole 2-1 is provided on the top of the support plate 2 for installing a micrometer support 10.

[0042] The micrometer support 10 is fixedly connected to the threaded hole 2 - 1 at the top of the support plate 2 , and is used to support the micrometer 16 and adjust the measuring position of the micrometer 16 .

[0043] The micrometer 16 is detachably mounted on the micrometer support 10 , and the push rod of the micrometer 16 is parallel to the base 1 .

[0044] like Figure 5As shown, the support sleeve 13 is a tubular structure with a stepped appearance, and its small diameter end is inserted into the through hole 2-2 of the support plate 2 until the step of the support sleeve 13 abuts against the surface of the support plate 2. The small diameter section of the support sleeve 13 is tightly fitted with the through hole 2-2, and the end face of the large diameter end of the support sleeve 13 is set to be sunken, and the inner diameter of the end face of the large diameter end is larger than the outer ring of the bearing, so as to maintain sufficient movement of the inner ring of the bearing on the bracket to be tested.

[0045] like Figure 6 As shown, the shaft 14 is a stepped shaft, and holes for connecting to the dynamometer 8 are respectively provided at both ends of the shaft 14. The large diameter end of the shaft 14 passes through the large diameter end of the support sleeve 13, passes through the small diameter end of the support sleeve 13, and also passes through the support plate 2. The large diameter end of the shaft 14 is precisely matched with the inner hole of the support sleeve 13; the small diameter end of the shaft 14 extends out of the large diameter end of the support sleeve 13, and the middle section is provided with a thread for matching with the clamping nut 18.

[0046] The push plate 15 is fixedly mounted on the large diameter end of the shaft 14 passing through the support plate 2, and a large distance is left from the support plate 2 to prevent the push plate 15 from colliding with the support plate 2 when the push plate 15 and the shaft 14 move; the height of the push plate 15 is higher than the height of the support plate 2, and the raised part contacts the end of the push rod of the micrometer 16, which is used to push the push rod of the micrometer 16 to detect the moving clearance of the shaft 14.

[0047] The vertical plate of the L-shaped pressure plate 11 is installed on the support plate 2 next to the large diameter end of the support sleeve 13, and its horizontal plate cooperates with the end face of the large diameter end of the support sleeve 13, and is used to clamp the bracket to be tested. The clamping bolt 12 passes through the horizontal plate of the L-shaped pressure plate 11 and is screwed into the threaded hole 2-3 on the support plate 2. The L-shaped pressure plate 11 and the clamping bolt 12 constitute a clamping device, which presses the bracket to be tested on the support plate 2 to prevent it from moving during the measurement process and causing measurement errors; the horizontal plate of the L-shaped pressure plate 11 is provided with a U-shaped groove, and the notch of the U-shaped groove is larger than the outer ring of the bearing on the bracket to be tested, so that the L-shaped pressure plate 11 is pressed on the bracket where the outer ring of the bearing is located.

[0048] During installation, the inner hole of the inner ring of the bearing of the bracket to be tested is inserted into the small diameter end of the shaft 14 until one side of the inner ring of the bearing rests on the step of the shaft 14. The clamping nut 18 is tightened on the thread of the middle section of the small diameter section of the shaft 14 from the other side of the inner ring of the bearing. The inner ring of the bearing of the bracket to be tested is pressed between the step of the shaft 14 and the clamping nut 18, so that the inner ring of the bearing and the shaft 14 can move together.

[0049] The slide 3 is L-shaped, with a total of four, each group of two symmetrically distributed at both ends of the support plate 2, the two slides 3 in each group are placed opposite to each other and symmetrically distributed on the edges of both sides of the base 1, and the vertical plate of the slide 3 is connected to the base 1 through a number of bolts, so that a slide is formed between its horizontal plate and the base 1, which is used to ensure that the slider 4 slides along the length direction of the base 1.

[0050] like Figure 8 As shown, the slider 4 is a T-shaped slider, two of which are provided, and the upper end surface thereof is provided with a blind hole 4-1 and a notch 4-3 perpendicular to the sliding direction, and the side wall of the notch 4-3 is provided with a hole 4-2 for the pull rod 7 to pass through, and the two sliders 4 are symmetrically placed outward on one side with the hole 4-2, and their lower ends are respectively inserted into the slides formed by the two groups of slides 3.

[0051] One end of the two dynamometers 8 is respectively hooked in the holes at both ends of the shaft 14, and the other end is connected to the blind hole 4-1 at the top of the slider 4 through the bayonet 9, so as to measure the forces on both sides of the inner ring of the bearing.

[0052] The two side panels 5 are symmetrically distributed on the outside of the two slideways 3 and fixedly connected to the base 1. They are provided with threaded through holes. The two pull rods 7 pass through the threaded through holes from the outside respectively, and cooperate with the side panels 5 through threads; the tail ends of the two pull rods 7 are respectively fixedly connected with handles 6 for screwing the pull rods 7. After the front ends of the two pull rods 7 pass through the holes 4-2 of the slider 4 and enter the notch 4-3, they are connected to the pull rods 7 through the cotter pins 17. By screwing the handles 6, the pull rods 7 can drive the slider 4 to slide.

[0053] The steps for using a bearing inner ring axial clearance detection device are as follows:

[0054] 1) Install the bracket to be tested on the testing device, such as Figure 4 As shown, at this time, the support sleeve 13 is inserted into the through hole 2-2 of the support plate 2, and one side end face of the bearing inner ring is attached to the large diameter end face of the support sleeve 13, and the small diameter end of the shaft 14 passes through the inner hole of the support sleeve 13 and the inner hole of the bearing inner ring; the clamping nut 18 passes through the small diameter end of the shaft 14 and is tightened on the thread of the small diameter end of the shaft 14 to fix the bearing inner ring to the shaft 14; the L-shaped pressure plate 11 is pressed on the bracket where the bearing outer ring is located, and is tightened with the clamping bolt 12 to complete the fixation of the shaft 14 and the parts.

[0055] 2) Hang the hook at one end of the dynamometer 8 on one side on the hole of the shaft 14 on that side, and connect the other end to the slider 4 on that side through the bayonet 9. The dynamometer 8 on the other side is not installed yet.

[0056] 3) By rotating the handle 6 on one side, the pull rod 7, slider 4, dynamometer 8, shaft 14, push plate 15 and bearing inner ring on that side are driven to move toward the side plate 5 on that side. At this time, observe the indication of the dynamometer 8 on that side. When the indication of the dynamometer 8 reaches 49N, push the push rod of the micrometer 16 against the push plate 15 at this time, and set the micrometer 16 to zero. At this time, the bearing inner ring is in position A.

[0057] 4) Hang the hook at one end of the dynamometer 8 on the other side on the hole on the side of the shaft 14, and connect the other end to the slider 4 on the side through the bayonet 9. By rotating the handle 6 on the other side, drive the pull rod 7, slider 4, dynamometer 8, shaft 14, and push plate 15 on the other side. At this time, observe the reading of the dynamometer 8 on the other side. When the reading of the dynamometer 8 reaches 2 times 49N, the inner ring of the bearing is in the A' position. Read the reading of the micrometer 16 at this time, which is the axial clearance L of the inner ring of the bearing. In this embodiment, L is 0.06mm, and the bearing is assembled successfully.

[0058] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A bearing inner ring axial clearance detection device, characterized in that: The detection device comprises a base (1), a support plate (2), a slideway (3), a slider (4), a side plate (5), a pull rod (7), a dynamometer (8), a bayonet (9), a micrometer support (10), an L-shaped pressure plate (11), a clamping bolt (12), a support sleeve (13), a shaft (14), a push plate (15), a micrometer (16), a cotter pin (17) and a clamping nut (18); The base (1) is a rectangular plate, serving as a mounting and measuring platform for the detection device, and is provided with a plurality of threaded holes; The support plate (2) is fixedly mounted on the base (1) and is positioned near the middle of the base (1). A through hole (2-2) and a first threaded hole (2-3) for mounting a clamping bolt (12) are provided on the side of the support plate (2). A second threaded hole (2-1) is provided on the top of the support plate (2) for mounting a micrometer support (10). The dial gauge (16) is detachably mounted on the dial gauge support (10), and the push rod of the dial gauge (16) is parallel to the base (1), and the dial gauge support (10) is used to support the dial gauge (16) and adjust the measuring position of the dial gauge (16); The support sleeve (13) is a tubular structure with a stepped appearance, and its small diameter end is inserted into the through hole (2-2) of the support plate (2) until the step of the support sleeve (13) abuts against the surface of the support plate (2), the small diameter section of the support sleeve (13) and the through hole (2-2) are tightly matched, the end face of the large diameter end of the support sleeve (13) is set to be sunken, and the inner diameter of the end face of the large diameter end is larger than the outer ring of the bearing, so as to maintain sufficient movement of the inner ring of the bearing on the bracket to be detected; The shaft (14) is a stepped shaft, and holes for connecting to the dynamometer (8) are respectively provided at both ends thereof. The large diameter end of the shaft (14) passes through the large diameter end of the support sleeve (13), passes through the small diameter end of the support sleeve (13), and also passes through the support plate (2). The large diameter end of the shaft (14) is precisely matched with the inner hole of the support sleeve (13); the small diameter end of the shaft (14) extends out of the large diameter end of the support sleeve (13), and a thread is provided in the middle section thereof for matching with the clamping nut (18); The push plate (15) is fixedly mounted on the large diameter end of the shaft (14) passing through the support plate (2), and is spaced apart from the support plate (2) to prevent the push plate (15) from colliding with the support plate (2) when the push plate (15) and the shaft (14) move; the height of the push plate (15) is higher than the height of the support plate (2), and the raised portion contacts the end of the push rod of the micrometer (16), and is used to push the push rod of the micrometer (16) to detect the moving clearance of the shaft (14); The vertical plate of the L-shaped pressing plate (11) is installed on the supporting plate (2) beside the large diameter end of the supporting sleeve (13), and the horizontal plate cooperates with the end surface of the large diameter end of the supporting sleeve (13) to clamp the bracket to be tested. The clamping bolt (12) passes through the horizontal plate of the L-shaped pressing plate (11) and is screwed into the first threaded hole (2-3) on the supporting plate (2). The L-shaped pressing plate (11) and the clamping bolt (12) constitute a clamping device to clamp the bracket to be tested on the supporting plate (2) to prevent it from moving during the measurement process and causing measurement errors. During installation, the inner hole of the inner ring of the bearing of the bracket to be tested is inserted into the small diameter end of the shaft (14) until one side of the inner ring of the bearing is against the step of the shaft (14), and the clamping nut (18) is screwed onto the thread of the middle section of the small diameter section of the shaft (14) from the other side of the inner ring of the bearing, and the inner ring of the bearing of the bracket to be tested is pressed between the step of the shaft (14) and the clamping nut (18), so that the inner ring of the bearing and the shaft (14) can move together; The slideway (3) is L-shaped, and there are four of them in total. Each group of two slideways (3) is symmetrically distributed at both ends of the support plate (2). The two slideways (3) in each group are placed opposite to each other and symmetrically distributed on the edges of both sides of the base (1). The vertical plate of the slideway (3) is connected to the base (1) so that a slideway is formed between its horizontal plate and the base (1) to ensure that the slider (4) slides along the length direction of the base (1); The slider (4) is a T-shaped slider, two of which are provided, and the upper end surface thereof is provided with a blind hole (4-1) and a notch (4-3) perpendicular to the sliding direction, and the side wall of the notch (4-3) is provided with a hole (4-2) for the pull rod (7) to pass through, and the two sliders (4) are symmetrically placed outward on one side provided with the hole (4-2), and the lower ends thereof are respectively inserted into the slideways formed by the two sets of slideways (3); One end of the two dynamometers (8) is respectively hooked in the holes at both ends of the shaft (14), and the other end is connected to the blind hole (4-1) at the top of the slider (4) through a bayonet (9), so as to measure the forces on both sides of the inner ring of the bearing; The two side plates (5) are symmetrically distributed on the outside of the two slideways (3) and fixedly connected to the base (1). They are provided with threaded through holes. Two pull rods (7) respectively pass through the threaded through holes from the outside and are engaged with the side plates (5) through threads. After the front ends of the two pull rods (7) pass through the holes (4-2) of the slider (4) and enter the notch (4-3), they are connected to the pull rods (7) through cotter pins (17), and the slider (4) is driven to slide by screwing the pull rods (7).

2. A bearing inner ring axial clearance detection device according to claim 1, characterized in that: A U-shaped groove is provided on the horizontal plate of the L-shaped pressing plate (11), and the opening of the U-shaped groove is larger than the outer ring of the bearing on the bracket to be tested, so that the L-shaped pressing plate (11) is pressed on the bracket where the outer ring of the bearing is located.

3. The bearing inner ring axial clearance detection device according to claim 1, characterized in that: The tail ends of the two pull rods (7) are respectively fixedly connected with handles (6) for screwing the pull rods (7).

4. A bearing inner ring axial clearance detection device according to claim 1, characterized in that: The base (1) is made of steel.

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