A fast water pump bearing radial clearance detector

Abstract

A rapid water pump bearing radial clearance detector, characterized in that it includes a stepped base, a fixing mechanism arranged on the upper layer of the stepped base and fixing the bottom and upper ends of the mandrel in the vertical direction, and a spring gauge measuring mechanism arranged on the lower layer of the stepped base; the fixing mechanism arranged on the upper layer of the stepped base includes an adjustable positioning plate and a fixing assembly, the adjustable positioning plate is used to fix the bottom end of the mandrel and is connected to the base, and the fixing assembly is used to fix the upper end of the mandrel; the fixing assembly includes an inverted L-shaped frame, an adjusting screw passing downward from the top of the inverted L-shaped frame, and an adjusting handle on the adjusting screw; the fixing assembly also includes a replaceable pressing plate arranged in a vertical direction opposite to the adjustable positioning plate and integrally connected to the lower end of the adjusting screw. The present invention cleverly uses the earth's gravity to set the direction of gravity and the direction of the pressing force on the mandrel to be consistent, thereby achieving a twice the result with half the effort effect in fixing the mandrel.

Description

Technical Field

[0001] The present application relates to the field of bearing size detectors, and in particular to a fast water pump bearing radial clearance detector. Background Art

[0002] Common water pump bearings include a core shaft, a bearing outer ring sleeved on the core shaft, and a roller set between the bearing outer ring and the core shaft. After the water pump bearing is processed and assembled, it is necessary to test the radial clearance of the water pump bearing (the gap between the bearing outer ring and the core shaft) to ensure that the radial clearance of the water pump bearing is within a reasonable range, thereby ensuring the normal use of the water pump bearing. Common bearing clearance testers such as Figure 1a , Figure 1b As shown, only ordinary water pump bearings (such as Figure 1c The detection of clearance of special water pump bearings is not suitable for the detection of clearance of special water pump bearings. The reason is that compared with ordinary water pump bearings, special water pump bearings have two special conditions, such as Figure 1d , Figure 1e As shown, the first special water pump bearing: the end face of one end of its core shaft protrudes from the end face of the bearing outer ring by only 3-5 mm, that is, the exposed part of one end of the core shaft of this special water pump bearing is very short, almost flush with the end face of the water pump bearing outer ring; the second special water pump bearing, one end of its core shaft is recessed in the bearing outer ring, and the length of the core shaft is 3-5 mm shorter than the bearing outer ring. The first problem of the conventional water pump bearing clearance tester based on tapered holes in the prior art is that it is not suitable for the detection of two special water pump bearings: first, it is not suitable for the case where one end of the special water pump bearing mandrel protrudes only 3-5 mm from the outer ring of the bearing. When measuring the bearing clearance, the outer ring is measured by radial relative movement relative to the mandrel, which requires the mandrel to be fixed in position. However, since the mandrel is only 3-5 mm exposed from the outer ring, the fixture cannot fix the mandrel, so the conventional bearing clearance tester cannot measure the clearance of the first special water pump bearing at all; second, it is not suitable for the case where one end of the mandrel of the special water pump bearing is recessed relative to the end face of the outer ring and the mandrel length is 3-5 mm shorter than the outer ring of the bearing, that is, the mandrel in the middle of the bearing is recessed and the outer ring around it is protruding. If this type of bearing is placed in a tapered hole, the tapered hole first fixes the outer ring instead of the mandrel, so the conventional water pump bearing clearance tester based on tapered holes is still not applicable to the clearance detection of the second special water pump bearing; the conventional water pump bearing clearance tester based on tapered holes in the prior art.

[0003] The second problem is that ordinary water pump bearing testers are slow and inefficient in replacing bearings. This is because when replacing bearings, the fixtures with tapered holes at both ends of the tester need to move outward for a certain distance to allow the core shaft to move out of the obstruction of the tapered holes at both ends. Since the exposed parts at both ends of the core shaft of an ordinary water pump bearing are relatively long and there are more parts of it trapped in the tapered holes at both ends, when replacing bearings, the fixtures at both ends of the tester with tapered holes have to move outward for a long distance, which results in a relatively low speed and efficiency in replacing ordinary bearings on an ordinary bearing clearance tester. In short, the ordinary water pump bearing clearance tester of the prior art not only has a small detection range, but also takes a long time to replace the bearings. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a rapid water pump bearing radial clearance detector, aiming to solve the problems that the conventional water pump shaft clearance detector is time-consuming and labor-intensive in replacing bearings, and the detection range is limited to ordinary water pump bearings and is not suitable for special water pump bearings.

[0005] The present invention adopts the following technical solutions to solve the technical problems:

[0006] A fast water pump bearing radial clearance detector, characterized in that it includes a stepped base, a fixing mechanism arranged on the upper layer of the stepped base and fixing the bottom and upper ends of the core shaft in the vertical direction, and a spring gauge measuring mechanism arranged on the lower layer of the stepped base; the fixing mechanism arranged on the upper layer of the stepped base includes an adjustable positioning plate and a fixing assembly, the adjustable positioning plate is used to fix the bottom end of the core shaft and is connected to the base, and the fixing assembly is used to fix the upper end of the core shaft; the fixing assembly includes an inverted L-shaped frame, an adjusting screw passing downward from the top of the inverted L-shaped frame, and an adjusting handle on the adjusting screw; the fixing assembly also includes a replaceable pressure plate arranged in a vertical direction opposite to the adjustable positioning plate and integrally connected to the lower end of the adjusting screw, the replaceable pressure plate directly acts on the upper end of the core shaft, and the axis of the replaceable pressure plate and the axis of the core shaft coincide with each other, and the replaceable pressure plate includes a flat-head pressure plate, a conical pressure plate, and an inverted pointed pressure plate.

[0007] Moreover, the position of the adjustable positioning plate is adjustable to ensure that the axis of the core shaft coincides with the axis of the replaceable pressing plate; a positioning groove is provided on the adjustable positioning plate, the cross section of the positioning groove is triangular, and one side of the positioning groove is open;

[0008] Moreover, a threaded hole matched with the thread of the adjusting screw is opened at the upper end of the inverted L-shaped frame, and the axis of the adjusting screw is perpendicular to the upper end surface of the replaceable pressing plate.

[0009] Moreover, the end face of the flat-head pressure plate of the replaceable pressure plate facing the positioning plate is a plane, which is used in applications of ordinary water pump bearings whose upper end face of the core shaft is a plane; the end face of the conical pressure plate of the replaceable pressure plate facing the positioning plate is a conical surface that is wide at the top and narrow at the bottom, which is used in applications of special water pump bearings whose upper end face of the core shaft is a concave surface; the end face of the reverse-pointed pressure plate facing the positioning plate is a reverse-pointed pressure plate with a concave middle portion upward, and the reverse-pointed concave surface is used in applications of special water pump bearings whose upper end face of the core shaft is a boss.

[0010] Moreover, for the special water pump bearing whose core shaft end face is concave, the upper end face of the core shaft is 3-5 mm lower than the outer ring of the core shaft at that end; for the special water pump bearing whose core shaft upper end face is a boss, the upper end face of the core shaft is 3-5 mm higher than the outer ring of the core shaft at that end.

[0011] Moreover, the spring gauge measuring mechanism includes a torsion spring gauge, which includes a gauge body arranged on the lower layer of a stepped base and a probe for contacting the side wall of the outer ring of the bearing; when the core shaft is fixed on the fixing mechanism, the axis of the probe is perpendicular to the side wall of the outer ring.

[0012] Moreover, the spring gauge measuring mechanism also includes a support rod arranged at the lower layer of the stepped base for supporting the spring gauge measuring mechanism, a guide rod parallel to the support rod in the vertical direction is arranged next to the support rod, a connecting sleeve is sleeved on the outer periphery of the support rod and the guide rod and can adjust the position up and down along the support rod and the guide rod, and the upper end surface and lower end surface of the connecting sleeve are respectively provided with a support rod hole and a guide rod hole for the support rod and the guide rod to pass through up and down; the lower ends of the support rod and the guide rod are connected to the base, and the upper ends of the support rod and the guide rod are jointly connected to the end cover at the top end of the support rod.

[0013] Moreover, the connecting sleeve includes two connecting plates with semicircular surfaces butted together, wherein the two semicircular surfaces on the butted connecting plates surround the support rod; the two end surfaces of the two connecting plates, each facing away from the semicircular surface, are connected through a first bolt.

[0014] Moreover, the lower end surface of the connecting sleeve is also provided with a supporting sleeve for supporting the connecting sleeve, and the supporting sleeve is in contact with the lower end surface of the connecting sleeve.

[0015] Moreover, the side end face of the connecting sleeve is connected to the fixing sleeve, and the fixing sleeve is used to allow the fixing rod to pass through it horizontally, and the fixing rod and the supporting rod are perpendicular to each other, the axis of the fixing rod is parallel to the axis of the measuring head, and the torsion spring table is arranged on the fixing rod; the fixing sleeve is composed of two upper and lower fixing plates butted together, and the upper and lower fixing plates butt together are connected to the connecting sleeve on one side close to the connecting sleeve, and the other side is connected up and down by a second bolt.

[0016] Advantages and effects of the present invention

[0017] 1. The present invention overcomes the traditional prejudice, that is, simply overcoming the prejudice of radial force by adding resistance to the core shaft, specifically by setting a tapered hole to limit the radial movement of the core shaft. The present invention starts from another perspective of solving the problem, starting from the source of the radial force, eliminating the radial force from the source, and cleverly using the earth's gravity to set the direction of gravity and the direction of the clamping force on the core shaft to be consistent, thereby achieving twice the result with half the effort in fixing the core shaft.

[0018] 2. The present invention achieves unexpected results by changing the layout angle of the mandrel on the detector: the mandrel arranged in the horizontal direction is changed to the mandrel arranged in the vertical direction, and the detector is specially designed for the mandrel arranged in the vertical direction, and is provided with a triangular positioning plate 21 with one end open for fixing the bottom end of the mandrel, and an inverted L-shaped frame for fixing the upper end of the mandrel, an adjusting screw 223 on the frame, and a handle 224 on the adjusting screw. By setting the axis of the mandrel and the axis of the pressure plate to coincide, the clamping force on the mandrel in the vertical direction is strictly consistent with the direction of gravity, which fundamentally eliminates the possibility of radial force on the mandrel due to the inconsistency between the clamping force on the mandrel 42 and the direction of gravity. The breakthrough of this technical difficulty makes it possible to completely replace the tapered hole pressure plate with a flat-head pressure plate for fixing the pressure plate on the upper end of the mandrel. When disassembling the bearing, due to the use of a flat-head pressure plate, the two planes of the mandrel and the pressure plate can be separated by slightly turning the adjusting screw, and the stroke of the adjusting screw 223 in this process is almost zero, which saves time and effort and is convenient to operate.

[0019] 3. The present invention makes the mandrel pressure plate into a replaceable and customizable pressure plate, wherein the flat-head pressure plate and the positioning plate with a triangular inner hole are combined to meet the needs of ordinary water pump bearings of different diameters. The upper ends of flat-head mandrels of different diameters can all be fitted with flat-head pressure plates, and the bottom ends of flat-head mandrels of different diameters use positioning plates with a triangular inner hole and one end open; conical pressure plates and concave pressure plates are suitable for the needs of special water pump bearings. Therefore, the rapid water pump bearing radial clearance detector of the present invention has a wide detection range and is suitable for the detection of all water pump bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1a This is a stereogram of a common water pump bearing clearance monitor;

[0021] Figure 1b This is a cross-sectional view of a common water pump bearing clearance monitor;

[0022] Figure 1c This is the appearance diagram of a common water pump bearing;

[0023] Figure 1d This is one of the dimensions of the special water pump bearing;

[0024] Figure 1e The second pair of dimensions for the special water pump bearing;

[0025] Figure 2a A three-dimensional diagram of a rapid water pump bearing radial clearance detector according to the present invention;

[0026] Figure 2b A second stereogram of a rapid water pump bearing radial clearance detector of the present invention;

[0027] Markings in the accompanying drawings: 1. base; 2. fixing mechanism; 21. positioning plate; 211. positioning groove; 22. fixing assembly; 221. inverted L-shaped frame; 222. replaceable pressure plate; 2221. center hole; 223. adjusting screw; 224. handle; 3. measuring mechanism; 31. support rod; 311. support sleeve; 312. connecting sleeve; 313. first bolt; 32. guide rod; 33. fixing rod; 331. fixing sleeve; 332. second bolt; 34. torsion spring meter; 341. meter body; 342. probe; 4. bearing; 41. outer ring; 42. core shaft. DETAILED DESCRIPTION

[0028] 1. Design principle of the present invention to achieve the first objective

[0029] 1. What is the “slowness” of existing technologies?

[0030] like Figure 1a , Figure 1bThe figure shows a detector for fixing the spindle of an ordinary water pump bearing in the horizontal direction in the prior art. When the spring gauge reads the radial clearance of the bearing, the outer ring of the spindle needs to move radially relative to the spindle. In order to keep the position of the spindle fixed and not move with the movement of the outer ring, the prior art adopts the method of making the clamps at both ends into clamps with tapered holes. The function of the tapered hole is to clamp the two ends of the spindle to prevent the spindle from moving radially. Since the tapered hole needs to meet the needs of spindles of different diameters, in order to clamp spindles of different diameters, the tapered hole cannot be too short and must have a certain depth to meet various needs. When replacing the bearing, the spring crank on the clamp makes the clamps at both ends move outward along the track for a certain distance until the spindle is completely separated from the tapered hole of the clamp. From the above analysis, it can be seen that the prior art is "slow" in the horizontal fixing method of the spindle, specifically in the use of the "tapered hole". However, there is no other way to arrange the spindle in the horizontal direction. If the spindle is to be clamped, a tapered hole must be used to prevent radial movement. If the clamps on both sides are used to replace the tapered holes with flat surfaces, the mandrel must not be fixed. This is because the mandrel is affected by gravity when it is laid horizontally, and the gravity is directed downward, which disperses the lateral force applied by the clamp to the mandrel, making the lateral force acting on the mandrel insufficient to block the radial force on the mandrel. When the radial force is greater than the extrusion force, the mandrel moves radially. Therefore, the root cause is that the direction of gravity on the mandrel is inconsistent with the direction of the clamp's pressure. Since the directions of the forces on the mandrel are inconsistent, the radial force can only be overcome by increasing the resistance with a tapered hole. When the tapered hole is used to replace the bearing, the travel of the clamp on the track is relatively long, so the bearing replacement speed is slow.

[0031] 2. What is the “fastness” of the present invention? First, a flat-head pressure plate is used to approximately achieve a “zero” stroke. There are two ways to eliminate radial force, either by increasing resistance to overcome the radial force, or by eliminating the radial force at the source without increasing resistance. The present invention adopts the latter method. Since the directions of gravity and clamping force are consistent, not only the radial force is eliminated, but also the clamping force on the core shaft in the vertical direction is increased due to the increase in gravity. Since the radial force is eliminated, there is no need to increase resistance through the tapered hole. Therefore, the pressure plate acting on the upper end of the core shaft can completely use a flat-head pressure plate to measure the radial clearance of ordinary water pump bearings. Figure 2b As shown, when the bearing needs to be replaced, it is only necessary to slightly rotate the crank handle, and the crank handle 224 drives the adjusting screw 223, and the adjusting screw drives the replaceable pressure plate 222 to easily move the mandrel from the fixed position. Compared with the flat head pressure plate and the tapered hole, the stroke of the crank handle is almost zero, so the time for replacing the bearing is greatly shortened. Secondly, an adjustable positioning plate with an inner triangle shape and an opening at one end is used to fix the bottom of the mandrel. The adjustable positioning plate can be moved appropriately as needed to ensure that the axis of the mandrel with different diameters coincides with the axis of the pressure plate.

[0032] 2. Design Principle of the Present Invention to Achieve the Second Objective

[0033] 1. Flat head pressure plate can only be used in the case where the end face of the water pump bearing is also flat. Only when the two contact surfaces of the flat head pressure plate and the bearing end face are completely consistent can the maximum force effect be achieved. Figure 1d , Figure 1e As shown in FIG. 1 , when the end face of one end of the mandrel is a boss or a concave surface, if a flat pressure plate is used, the end faces of the two types of special bearings and the flat head pressure plate cannot completely match each other. In this case, a component force that causes the mandrel to move radially will also be generated. Therefore, the present invention sets the pressure plate as a replaceable and customizable special-shaped pressure plate such as Figure 2b As shown, the upper end surface of the replaceable pressing plate 222 is provided with an internal threaded hole, which is connected to the external thread of the adjusting screw 223. According to the different characteristics of the end surface of the mandrel, a special-shaped pressing plate that matches it can be made, and then the adjusting screw 223 and the replaceable pressing plate 222 are installed in an integrated manner by threaded connection. In this embodiment, the replaceable and customizable pressing plates include two types. More types can also be added as needed.

[0034] 2. The flat head pressure plate is suitable for ordinary water pump bearings of different diameters. Ordinary water pump bearings such as Figure 1c As shown, the replaceable pressing plate 222 is combined with the positioning plate 21 with a triangular inner hole, which can be adapted to the needs of different diameters of the upper and lower ends of the core shaft.

[0035] Based on the above invention principle, the present invention designs a fast water pump bearing radial clearance detector. A fast water pump bearing radial clearance detector such as Figure 2a , 2b As shown, its features include: comprising a stepped base 1, a fixing mechanism 2 arranged on the upper layer of the stepped base 1 and fixing the bottom and upper ends of the mandrel 42 in the vertical direction, and a spring gauge measuring mechanism 3 arranged on the lower layer of the stepped base 1; the fixing mechanism 2 arranged on the upper layer of the stepped base 1 comprises an adjustable positioning plate 21 and a fixing assembly 22, the adjustable positioning plate 21 is used to fix the bottom end of the mandrel 42 and is connected to the base 1, and the fixing assembly 22 is used to fix the upper end of the mandrel 42; the fixing assembly 22 comprises an inverted L-shaped frame 2 21, and an adjusting screw 223 passing downward from the top of the inverted L-shaped frame 221, and an adjusting handle 224 on the adjusting screw 223; the fixing assembly 22 also includes a replaceable pressure plate 222 which is arranged in a vertical direction opposite to the adjustable positioning plate 21 and is integrally connected to the lower end of the adjusting screw 223, the replaceable pressure plate 222 directly acts on the upper end of the core shaft 42, and the axis of the replaceable pressure plate 222 and the axis of the core shaft 42 coincide with each other, and the replaceable pressure plate 222 includes a flat-head pressure plate, a conical pressure plate, and an inverted pointed pressure plate.

[0036] The positioning plate 21 is provided with a positioning groove 211 . The cross section of the positioning groove 211 is triangular, and one side of the positioning groove 211 is open.

[0037] A threaded hole threadably matched with the adjusting screw 223 is formed at the upper end of the inverted L-shaped frame 221 , and the axis of the adjusting screw 223 is perpendicular to the upper end surface of the replaceable pressing plate 222 .

[0038] The end face of the flat-head pressure plate of the replaceable pressure plate 222 facing the positioning plate 21 is a plane, which is used in applications of ordinary water pump bearings whose upper end face of the core shaft is a plane; the end face of the conical pressure plate of the replaceable pressure plate 222 facing the positioning plate 21 is a conical surface that is wide at the top and narrow at the bottom, which is used in applications of special water pump bearings whose upper end face of the core shaft is a concave surface; the end face of the reverse-pointed pressure plate facing the positioning plate 21 is a reverse-pointed pressure plate with a concave middle part upward, and the reverse-pointed concave surface is used in applications of special water pump bearings whose upper end face of the core shaft is a boss.

[0039] The special water pump bearing whose core shaft end face is concave has an upper end face of the core shaft 3-5 mm lower than the outer ring of the core shaft at that end; the special water pump bearing whose core shaft upper end face is a boss has an upper end face of the core shaft 3-5 mm higher than the outer ring of the core shaft at that end.

[0040] The spring gauge measuring mechanism 3 includes a torsion spring gauge 34, which includes a gauge body 341 arranged on the lower layer of the stepped base 1 and a probe 342 for contacting the side wall of the bearing outer ring 41; when the core shaft 42 is fixed on the fixing mechanism 2, the axis of the probe 342 is perpendicular to the side wall of the outer ring 41. The spring gauge measuring mechanism 3 also includes a support rod 31 arranged at the lower layer of the stepped base 1 for supporting the spring gauge measuring mechanism 3, a guide rod 32 parallel to the support rod 31 in the vertical direction is provided next to the support rod 31, a connecting sleeve 312 is sleeved on the outer periphery of the support rod 31 and the guide rod 32 and can move up and down along the support rod 31 and the guide rod 31, and the upper end surface and lower end surface of the connecting sleeve 312 are respectively provided with a support rod 31 hole and a guide rod 32 hole for the support rod 31 and the guide rod 32 to pass through up and down; the lower ends of the support rod 31 and the guide rod 32 are connected to the base 1, and the upper ends of the support rod 31 and the guide rod 32 are jointly connected to the end cover at the top end of the support rod 31.

[0041] The connecting sleeve 312 includes two connecting plates with semicircular surfaces butted together, wherein the two semicircular surfaces of the connecting plates butted together surround the support rod 31 therein; the two end surfaces of the two connecting plates, each facing away from the semicircular surface, are penetrated and connected by a first bolt 313 .

[0042] The lower end surface of the connecting sleeve 312 is further provided with a supporting sleeve 311 for supporting the connecting sleeve 312 , and the supporting sleeve 311 is in contact with the lower end surface of the connecting sleeve 312 .

[0043] The side end surface of the connecting sleeve 312 is connected to the fixing sleeve 331, and the fixing sleeve 331 is used to pass the fixing rod 33 horizontally through it, and the fixing rod 33 and the supporting rod 31 are perpendicular to each other, and the axis of the fixing rod 33 is parallel to the axis of the measuring head 342, and the torsion spring gauge 34 is set on the fixing rod 33; the fixing sleeve 331 is composed of two upper and lower fixing plates butted together, and the upper and lower fixing plates are connected to the connecting sleeve 312 on one side close to the connecting sleeve 312, and the other side is connected by a second bolt 332 passing through it from top to bottom.

[0044] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and thus the present invention includes but is not limited to the embodiments described in the specific implementation manner.

Claims

1. A rapid water pump bearing radial clearance detector, characterized in that: The invention comprises a stepped base (1), a fixing mechanism (2) arranged on the upper layer of the stepped base (1) and fixing the bottom end and the top end of a core shaft (42) in the vertical direction, and a spring gauge measuring mechanism (3) arranged on the lower layer of the stepped base (1); the fixing mechanism (2) arranged on the upper layer of the stepped base (1) comprises a positioning plate (21) and a fixing assembly (22); the positioning plate (21) is used to fix the bottom end of the core shaft (42) and is connected to the base (1); the fixing assembly (22) is used to fix the top end of the core shaft (42); the fixing assembly (22) comprises an inverted L-shaped frame (221 ), and an adjusting screw (223) passing downward from the top of the inverted L-shaped frame (221), and an adjusting handle (224) on the adjusting screw (223); the fixing assembly (22) also includes a replaceable pressing plate (222) arranged in a vertical direction opposite to the positioning plate (21) and integrally connected to the lower end of the adjusting screw (223), the replaceable pressing plate (222) directly acts on the upper end of the core shaft (42), and the axis of the replaceable pressing plate (222) and the axis of the core shaft (42) coincide with each other, and the replaceable pressing plate (222) includes a flat-head pressing plate, a conical pressing plate, or an inverted pointed pressing plate; The end surface of the flat-headed pressure plate of the replaceable pressure plate (222) facing the positioning plate (21) is a plane, which is used in applications where the upper end surface of the core shaft is a plane. The end surface of the conical pressure plate of the replaceable pressure plate (222) facing the positioning plate (21) is a conical surface that is wide at the top and narrow at the bottom, which is used in applications where the upper end surface of the core shaft is a concave surface. The end surface of the reverse-pointed pressure plate facing the positioning plate (21) is a reverse-pointed pressure plate that is concave in the middle, which is used in applications where the upper end surface of the core shaft is a boss.

2. According to claim 1, a rapid water pump bearing radial clearance detector is characterized in that: The position of the positioning plate (21) is adjustable to ensure that the axis of the core shaft (42) and the axis of the replaceable pressing plate (222) coincide with each other; a positioning groove (211) is provided on the positioning plate (21), the cross section of the positioning groove (211) is triangular, and one side of the positioning groove (211) is open.

3. A rapid water pump bearing radial clearance detector according to claim 1, characterized in that: A threaded hole threadably matched with an adjusting screw rod (223) is provided at the upper end of the inverted L-shaped frame (221), and the axis of the adjusting screw rod (223) is perpendicular to the upper end surface of the replaceable pressing plate (222).

4. A rapid water pump bearing radial clearance detector according to claim 1, characterized in that: The special water pump bearing whose core shaft end face is concave has an upper end face of the core shaft 3-5 mm lower than the outer ring of the core shaft at that end; the special water pump bearing whose core shaft upper end face is a boss has an upper end face of the core shaft 3-5 mm higher than the outer ring of the core shaft at that end.

5. A rapid water pump bearing radial clearance detector according to claim 1, characterized in that: The spring gauge measuring mechanism (3) comprises a torsion spring gauge (34), wherein the torsion spring gauge (34) comprises a gauge body (341) arranged on the lower layer of a stepped base (1) and a probe (342) for contacting the side wall of a bearing outer ring (41); when the core shaft (42) is fixed on the fixing mechanism (2), the axis of the probe (342) and the side wall of the outer ring (41) are perpendicular to each other.

6. A rapid water pump bearing radial clearance detector according to claim 1, characterized in that: The spring gauge measuring mechanism (3) further comprises a support rod (31) arranged at the lower layer of the stepped base (1) for supporting the spring gauge measuring mechanism (3); a guide rod (32) parallel to the support rod (31) is arranged beside the support rod (31); a connecting sleeve (312) sleeved on the outer periphery of the support rod (31) and the guide rod (32) and capable of adjusting the position up and down along the support rod (31) and the guide rod (32); a support rod (31) hole and a guide rod (32) hole for the support rod (31) and the guide rod (32) to pass through up and down are respectively provided on the upper end surface and the lower end surface of the connecting sleeve (312); the lower ends of the support rod (31) and the guide rod (32) are connected to the base (1); the upper ends of the support rod (31) and the guide rod (32) are jointly connected to the end cover at the top end of the support rod (31).

7. A rapid water pump bearing radial clearance detector according to claim 6, characterized in that: The connecting sleeve (312) comprises two connecting plates with semi-circular surfaces and butted together, wherein the two semi-circular surfaces on the butted connecting plates surround the support rod (31); The two end surfaces of the two connecting plates, which are respectively away from the semicircular arc surface, are connected through first bolts (313).

8. The water pump bearing radial clearance detector according to claim 6, characterized in that: The lower end surface of the connecting sleeve (312) is also provided with a supporting sleeve (311) for supporting the connecting sleeve (312), and the supporting sleeve (311) is in abutment with the lower end surface of the connecting sleeve (312).

9. The water pump bearing radial clearance detector according to claim 6, characterized in that: The side end surface of the connecting sleeve (312) is connected to the fixing sleeve (331), and the fixing sleeve (331) is used for the fixing rod (33) to pass through it horizontally, and the fixing rod (33) and the supporting rod (31) are perpendicular to each other, and the axis of the fixing rod (33) is parallel to the axis of the measuring head (342), and the torsion spring table (34) is arranged on the fixing rod (33); the fixing sleeve (331) is composed of two upper and lower fixing plates butted together, and the two upper and lower fixing plates butted together are connected to the connecting sleeve (312) at one side close to the connecting sleeve (312), and the other side is connected by a second bolt (332) penetrating from top to bottom.

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