Accurate press-fitting equipment for water pump bearing

Abstract

The invention relates to the field of water pump production and machining equipment, in particular to accurate press-fitting equipment for a water pump bearing. The water pump bearing accurate press-fitting equipment with the automatic material taking function is provided. Accurate press-fitting equipment for water pump bearings comprises a base, and the top of the base is connected with a first fixing frame; a rodless air cylinder is further included and installed between the first fixing frame and the second fixing frame, a gas-liquid pressure cylinder is installed on a cylinder barrel of the rodless air cylinder, a first elastic telescopic rod is connected to a telescopic part of the gas-liquid pressure cylinder, a connecting frame is connected to the bottom of the first elastic telescopic rod, and a grabbing assembly is arranged at the bottom of the connecting frame. The telescopic part of the gas-liquid pressure cylinder is connected with a first pressing frame and provided with a separation assembly. The bearing main body is automatically grabbed through the grabbing assembly, time and labor are saved, when the bearing main body is pressed by the first pressing frame, an inner ring of the bearing main body is prevented from being stressed through the separating assembly, bearing damage is avoided, and the pressing effect is improved.

Description

Technical Field

[0001] The invention relates to the field of water pump production and processing equipment, and in particular to a water pump bearing precision press-fitting device. Background Art

[0002] A water pump is a machine that transports liquid or pressurizes liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the liquid energy to complete the transportation. The role of water pump bearings is particularly important among water pump components. It is used to balance the axial force. During the production process of the water pump, it is necessary to press the bearings on one end with the help of pressure.

[0003] Patent publication number CN212763178U discloses a water pump bearing shaft mandrel clamping device, including a work cabinet, a fixed bracket fixedly connected between the two ends of the top of the work cabinet, a hydraulic telescopic rod fixedly connected to the middle end of the fixed bracket, a bearing placement seat fixedly connected to the bottom of the hydraulic telescopic rod, a placement hole is opened at the middle end of the bottom of the bearing placement seat, magnets are fixedly connected on both sides of the inner cavity of the placement hole, and an operating box is fixedly connected to the middle end of the top of the work cabinet.

[0004] The above-mentioned water pump bearing shaft push rod clamping device drives the L-shaped clamping rods and pressure plates on both sides to approach each other by controlling the cylinder, so as to quickly fix the shaft push rod, and then place the bearing in the bearing placement seat, and then press the bearing onto the shaft push rod through the hydraulic telescopic rod. However, the device requires manual placement of the bearing and then press-fitting, which is time-consuming and labor-intensive and affects work efficiency. Therefore, a water pump bearing precision press-fitting equipment with automatic material picking function is developed. Summary of the invention

[0005] In order to overcome the disadvantages of manually placing the bearings and then press-fitting them, which is time-consuming and labor-intensive and affects work efficiency, the present invention provides a water pump bearing precision press-fitting device with an automatic material taking function.

[0006] A water pump bearing precision pressing device comprises a base, a first fixing frame connected to the top of the base, a second fixing frame connected to the base, a fixing rod connected to the side of the second fixing frame close to the base, a water pump housing is placed on the side of the base close to the second fixing frame, and a bearing body is placed on the side of the base close to the first fixing frame; it is characterized in that it also comprises a rodless cylinder, the rodless cylinder is installed between the first fixing frame and the second fixing frame, a gas-liquid booster cylinder is installed on the cylinder barrel of the rodless cylinder, the telescopic part of the gas-liquid booster cylinder is connected to the first elastic telescopic rod, the first elastic telescopic rod is connected to a connecting frame, the connecting frame is provided with a grabbing assembly, the telescopic part of the gas-liquid booster cylinder is connected to the first pressing frame, and the telescopic part of the gas-liquid booster cylinder is provided with a separation assembly.

[0007] In a preferred embodiment of the present invention, the grabbing assembly includes a fixed ring connected to the bottom of the connecting frame, and three sliding rods are evenly and slidably connected to the fixed ring along the circumferential direction. First springs are connected between the sides of the sliding rods that are away from each other and the fixed ring, and the first springs are all wound around adjacent sliding rods.

[0008] In a preferred embodiment of the present invention, a clamping hole is formed on the side of the sliding clamping rods close to each other.

[0009] In a preferred embodiment of the present invention, the separation assembly includes a connecting rod, which is connected to the telescopic part of the gas-liquid booster cylinder. A sliding plate is slidably connected to the connecting frame. The bottom of the connecting rod is in contact with the sliding plate. Three wedge-shaped plugs are evenly connected to the bottom of the sliding plate along the circumference. A second elastic telescopic rod is connected between the sliding plate and the fixed ring, and the wedge-shaped plugs are squeezed and fitted with the adjacent sliding clamp rods.

[0010] In a preferred embodiment of the present invention, it also includes a locking assembly for locking the sliding plate after press-fitting. The locking assembly is arranged on the fixed ring. The locking assembly includes a wedge-shaped connecting rod. The wedge-shaped connecting rod is connected to the bottom of the cylinder barrel of the rodless cylinder. A connecting plate is connected to the fixed ring. A sliding wedge-shaped rod is slidably connected to the connecting plate. A second spring is connected between the sliding wedge-shaped rod and the connecting plate. The second spring is wound around the sliding wedge-shaped rod. The wedge-shaped connecting rod is squeezed and fitted with the sliding wedge-shaped rod.

[0011] In a preferred embodiment of the present invention, it also includes a positioning component for positioning the water pump housing for accurate press-fitting, the positioning component is arranged on the second fixed frame, the positioning component includes a control component, the control component is arranged on the second fixed frame, the fixed rod is slidably connected to symmetrically distributed sliding clamps, the symmetrically distributed sliding clamps are connected to the second fixed frame on one side close to each other, and the fourth springs are all wound around the fixed rod.

[0012] In a preferred embodiment of the present invention, the control component includes a fixed plate, the fixed plate is connected to the first pressure frame, the second fixed frame is slidably connected to the sliding frame, a third spring is connected between the sliding frame and the second fixed frame, the third spring is wound around the sliding frame, and the fixed plate is squeezed and matched with the sliding frame.

[0013] In a preferred embodiment of the present invention, the sides of the sliding clamps that are close to each other are arranged in an arc shape to facilitate fitting with the water pump housing.

[0014] In a preferred embodiment of the present invention, it also includes a lubrication assembly for applying lubricating oil to the outer wall of the bearing body. The lubrication assembly is arranged on the second fixed frame. The lubrication assembly includes an elastic tube, the elastic tube is connected to the second fixed frame, the elastic tube is connected to a pressure rod, the elastic tube is connected to a nozzle, the first pressure frame is connected to the second pressure frame, the second pressure frame is squeezed together with the pressure rod, and the nozzle is evenly installed with a plurality of nozzles.

[0015] In a preferred embodiment of the present invention, a limit assembly is further included for clamping and limiting the bearing body. The limit assembly is arranged on the base. The limit assembly includes a fixed seat. The fixed seat is symmetrically connected to the side of the base close to the bearing body. A limit plate is slidably connected in the fixed seat. A sixth spring is connected between the side of the limit plate away from each other and the adjacent fixed seat, and the sixth spring is wound around the adjacent limit plate.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention firstly automatically grabs the bearing body through the sliding clamp rod, which saves time and labor. Secondly, when the first pressing frame presses the bearing body into the water pump housing, the wedge-shaped insert block is inserted into the sliding clamp rod to prevent the inner ring of the bearing body from being stressed, thereby avoiding bearing damage and improving the pressing effect.

[0018] 2. The present invention clamps the sliding plate by sliding the wedge-shaped rod to keep it inserted into the sliding clamp rod, so as to prevent the sliding clamp rod from pressing against the inner wall of the water pump housing and causing wear when the sliding clamp rod is not withdrawn from the water pump housing, thereby improving the press-fitting effect.

[0019] 3. The present invention clamps and fixes the water pump housing in the middle by means of a sliding clamping plate, thereby improving the accuracy of press-fitting.

[0020] 4. The present invention controls the elastic cylinder to spray lubricating oil through the second pressing frame, which can reduce the friction between the bearing body and the water pump housing and improve the pressing efficiency.

[0021] 5. The present invention uses a limiting plate to limit the center position of the bearing body, thereby improving the efficiency of the sliding clamping rod in grabbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the press-fitting mechanism of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the grabbing assembly of the present invention.

[0026] Figure 5 It is a schematic diagram of the first three-dimensional structure of the separation component of the present invention.

[0027] Figure 6 It is a schematic diagram of the second three-dimensional structure of the separation component of the present invention.

[0028] Figure 7It is a schematic diagram of the three-dimensional structure of the locking assembly of the present invention.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention.

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the lubrication component of the present invention.

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the limiting component of the present invention.

[0032] Among them, the above-mentioned drawings include the following drawing marks: 1, base, 11, first fixed frame, 12, second fixed frame, 2, fixed rod, 3, water pump housing, 31, bearing body, 41, rodless cylinder, 42, gas-liquid booster cylinder, 43, first elastic telescopic rod, 44, connecting frame, 45, fixed ring, 46, sliding clamping rod, 47, first spring, 48, first pressure frame, 51, connecting rod, 52, sliding plate, 53, wedge-shaped plug, 54, second elastic telescopic rod, 61, wedge-shaped connecting rod, 62, connecting plate, 63, sliding wedge rod, 64, second spring, 71, fixed plate, 72, sliding frame, 73, third spring, 74, sliding splint, 75, fourth spring, 81, elastic cylinder, 82, pressure rod, 83, nozzle, 84, second pressure frame, 91, fixed seat, 92, limit plate, 93, sixth spring. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0034] Embodiment 1: A water pump bearing precision press-fitting device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a base 1, a first fixed frame 11 is connected to the right side of the top of the base 1, a second fixed frame 12 is connected to the left side of the top of the base 1, a fixed rod 2 is connected to the lower part of the second fixed frame 12, a water pump housing 3 is placed on the upper left side of the base 1, and a bearing body 31 is placed on the upper right side of the base 1; it also includes a rodless cylinder 41, the rodless cylinder 41 is installed between the first fixed frame 11 and the upper part of the second fixed frame 12, a gas-liquid booster cylinder 42 is installed on the cylinder barrel of the rodless cylinder 41, the telescopic part on the lower side of the gas-liquid booster cylinder 42 is connected to the first elastic telescopic rod 43, the bottom of the first elastic telescopic rod 43 is connected to a connecting frame 44, a grabbing assembly is provided at the bottom of the connecting frame 44, the telescopic part on the lower side of the gas-liquid booster cylinder 42 is connected to the first pressing frame 48, and the telescopic part of the gas-liquid booster cylinder 42 is provided with a separation assembly.

[0035] like Figure 4As shown, the grabbing assembly includes a fixed ring 45, which is connected to the bottom of the connecting frame 44. Three sliding clamping rods 46 are evenly connected to the fixed ring 45 in a circumferential sliding manner. First springs 47 are connected between the sides of the sliding clamping rods 46 that are away from each other and the fixed ring 45. The first springs 47 are all wound around the adjacent sliding clamping rods 46, and the sides of the sliding clamping rods 46 that are close to each other are provided with clamping holes.

[0036] like Figure 1 , Figure 5 and Figure 6 As shown, the separation assembly includes a connecting rod 51, which is connected to the telescopic part on the lower side of the gas-liquid booster cylinder 42, and a sliding plate 52 is slidably connected between the left and right sides of the middle of the connecting frame 44. The bottom of the connecting rod 51 is in contact with the sliding plate 52, and three wedge-shaped plugs 53 are evenly connected to the bottom of the sliding plate 52 along the circumferential direction. A second elastic telescopic rod 54 is connected between the front side of the bottom of the sliding plate 52 and the fixed ring 45, and the wedge-shaped plug 53 is squeezed and fitted with the adjacent sliding clamp rod 46.

[0037] When the bearing is press-fitted, the rodless cylinder 41 and the gas-liquid booster cylinder 42 are started, and the cylinder barrel of the rodless cylinder 41 is first controlled to drive the gas-liquid booster cylinder 42, the first elastic telescopic rod 43, the connecting frame 44, the fixing ring 45, the sliding clamp rod 46, the first pressing frame 48, the connecting rod 51, the sliding plate 52 and the wedge-shaped plug block 53 to move to the right together, so that the first pressing frame 48 stays just above the bearing body 31, and then the telescopic part of the gas-liquid booster cylinder 42 is controlled to drive the first elastic telescopic rod 43, the connecting frame 44, the fixing ring 45, the sliding clamp rod 46, the first pressing frame 48, the connecting rod 51, the sliding plate 52 and the wedge-shaped plug block 53 to move downward together. When the sliding clamp rod 46 moves downward until it contacts the bearing body 31, the inner ring of the bearing body 31 will squeeze the sliding clamp rod The rod 46 makes it move inward, and the first spring 47 is deformed. At this time, the sliding clamp rod 46 grabs the bearing body 31, and then controls the telescopic part of the gas-liquid booster cylinder 42 to drive the first elastic telescopic rod 43, the connecting frame 44, the fixing ring 45, the sliding clamp rod 46, the first pressure frame 48, the bearing body 31, the connecting rod 51, the sliding plate 52 and the wedge-shaped plug block 53 to move upward together, and then controls the cylinder barrel of the rodless cylinder 41 to move the first elastic telescopic rod 43, the connecting frame 44, the fixing ring 45, the sliding clamp rod 46, the first pressure frame 48, the bearing body 31, the connecting rod 51, the sliding plate 52 and the wedge-shaped plug block 53 to the left together, so that the bearing body 31 stays just above the water pump housing 3, and continues to control the telescopic part of the gas-liquid booster cylinder 42 to drive the first The elastic telescopic rod 43, the connecting frame 44, the fixing ring 45, the sliding clamping rod 46, the first pressing frame 48, the bearing body 31, the connecting rod 51, the sliding plate 52 and the wedge-shaped plug block 53 move downward together. When the bearing body 31 moves downward until it contacts the inner wall of the water pump housing 3, due to the friction between the bearing body 31 and the water pump housing 3, as the telescopic portion of the gas-liquid booster cylinder 42 continues to extend downward, the first elastic telescopic rod 43 will shrink upward, and the first pressing frame 48 and the connecting rod 51 will continue to move downward with the telescopic portion of the gas-liquid booster cylinder 42 until the first pressing frame 48 is pressed on the outer ring of the bearing body 31. At the same time, the connecting rod 51 will also press on the sliding plate 52 to drive the wedge-shaped plug block 53 to move downward until it is inserted into the clamping hole of the sliding clamping rod 46 , the second elastic telescopic rod 54 will shrink downward, and as the wedge-shaped plug block 53 continues to move downward, it will drive the sliding clamping rod 46 to move inward to the inner ring away from the bearing body 31, and the first spring 47 will continue to deform. When the first pressure frame 48 presses the bearing body 31 into the water pump housing 3, the telescopic part of the gas-liquid booster cylinder 42 is controlled to drive the first elastic telescopic rod 43, the connecting frame 44, the fixing ring 45, the sliding clamping rod 46, the first pressure frame 48, the connecting rod 51, the sliding plate 52 and the wedge-shaped plug block 53 to move upward and reset. When the first pressure frame 48 moves upward to separate from the outer ring of the bearing body 31 and the connecting rod 51 is no longer pressed on the sliding plate 52, under the elastic action of the first elastic telescopic rod 43 and the second elastic telescopic rod 54 themselves,The connecting frame 44, the fixing ring 45 and the sliding clamp rod 46 will move downward relatively, the sliding plate 52 and the wedge-shaped insert block 53 will move upward to reset, and under the elastic action of the first spring 47, the sliding clamp rod 46 will move outward to reset, and the rodless cylinder 41 and the gas-liquid booster cylinder 42 can be closed. In summary, the bearing body 31 is automatically grasped by the sliding clamp rod 46 first, which saves time and effort. Secondly, when the first pressing frame 48 presses the bearing body 31 into the water pump housing 3, the wedge-shaped insert block 53 is inserted into the sliding clamp rod 46, so that the inner ring of the bearing body 31 is not subjected to force to avoid bearing damage, thereby improving the press-fitting effect.

[0038] Embodiment 2: Based on embodiment 1, Figure 1 and Figure 7 As shown, it also includes a locking assembly for locking the sliding plate 52 after pressing, and the locking assembly is arranged on the fixing ring 45. The locking assembly includes a wedge-shaped connecting rod 61, and the wedge-shaped connecting rod 61 is connected to the bottom of the cylinder barrel of the rodless cylinder 41. A connecting plate 62 is connected to the outer side of the fixing ring 45, and a sliding wedge-shaped rod 63 is slidably connected to the connecting plate 62. A second spring 64 is connected between the rear part of the sliding wedge-shaped rod 63 and the connecting plate 62, and the second spring 64 is wound around the sliding wedge-shaped rod 63, and the wedge-shaped connecting rod 61 is squeezed and matched with the sliding wedge-shaped rod 63.

[0039] When the first pressing frame 48 presses the bearing body 31 into the water pump housing 3, it may be necessary to press the bearing body 31 into the lower part of the water pump housing 3. In order to prevent the wedge-shaped plug block 53 from separating from the sliding clamping rod 46, the sliding clamping rod 46 has not been completely withdrawn from the water pump housing 3. The sliding clamping rod 46 may be pressed against the inner wall of the water pump housing 3 under the elastic action of the first spring 47, causing wear thereof. The specific operation is as follows: when the connecting rod 51 presses on the sliding plate 52 to drive the wedge-shaped plug block 53 to move downward to the clamping hole inserted into the sliding clamping rod 46, the sliding plate 52 will contact the sliding wedge rod 63 to move it to the right front, and the second spring 64 will be deformed. When the sliding plate 52 continues to move downward to pass over the connecting plate 62, under the elastic action of the second spring 64, the sliding wedge rod 63 will move to the left rear and reset to clamp the sliding plate 52, so that the sliding plate When the sliding wedge rod 63 moves upward with the fixing ring 45 to contact the wedge connecting rod 61, the wedge connecting rod 61 will be inserted into the sliding wedge rod 63 so that it moves to the right front again to separate from the sliding plate 52, and the second spring 64 will be deformed again, and the sliding plate 52 will move upward and reset under the action of the second elastic telescopic rod 54, and then the telescopic part of the gas-liquid booster cylinder 42 is controlled to move slightly downward, so that the sliding wedge rod 63 is separated from the wedge connecting rod 61, and under the elastic action of the second spring 64, the sliding wedge rod 63 moves to the left rear and reset. In summary, the sliding plate 52 is clamped by the sliding wedge rod 63 to keep it inserted into the sliding card rod 46, so as to avoid the sliding card rod 46 from pressing against the inner wall of the water pump housing 3 when it is not withdrawn from the water pump housing 3, causing wear thereof, thereby improving the press-fitting effect.

[0040] like Figure 1 and Figure 8 As shown, it also includes a positioning component for positioning the water pump housing 3 for accurate press-fitting, the positioning component is arranged on the second fixed frame 12, the positioning component includes a control component, the control component is arranged in the middle of the second fixed frame 12, the front and rear parts of the fixed rod 2 are slidably connected with a sliding clamp 74, and the left part of the sliding clamp 74 close to each other is connected to the second fixed frame 12, and the fourth spring 75 is wound around the fixed rod 2, and the side of the sliding clamp 74 close to each other is arranged in an arc shape to facilitate fitting with the water pump housing 3.

[0041] like Figure 8 As shown, the control assembly includes a fixed plate 71, which is connected to the upper left part of the first pressure frame 48, a sliding frame 72 is slidably connected to the middle part of the second fixed frame 12, a third spring 73 is connected between the upper part of the sliding frame 72 and the second fixed frame 12, the third spring 73 is wound around the sliding frame 72, and the fixed plate 71 is squeezed and matched with the sliding frame 72.

[0042] When the locking cam 73 is in place, the locking cam 73 will be in place when the locking cam 73 is in place and the spring 73 is in place when the spring 73 is in place.

[0043] like Figure 1 and Fig. 9 As shown, it also includes a lubrication assembly for applying lubricating oil to the outer wall of the bearing body 31. The lubrication assembly is arranged on the second fixed frame 12. The lubrication assembly includes an elastic tube 81. The elastic tube 81 is connected to the middle of the second fixed frame 12. The top of the elastic tube 81 is connected to a pressure rod 82. The right wall of the elastic tube 81 is connected to a nozzle 83. The upper part of the first pressure frame 48 is connected to a second pressure frame 84. The second pressure frame 84 is squeezed and matched with the pressure rod 82. A plurality of nozzles are evenly installed on the nozzle 83.

[0044] In order to reduce the friction between the bearing body 31 and the water pump housing 3 and improve the press-fitting efficiency, the specific operation is as follows: when the first press frame 48 moves downward, it will drive the second press frame 84 to move downward until it contacts the pressure rod 82, pressing the pressure rod 82 downward, thereby causing the elastic tube 81 to deform and compress its internal space. Under the condition of the pressure difference between the inside and the outside, the elastic tube 81 will spray lubricating oil to the outer wall of the bearing body 31 through the nozzle 83. When the second press frame 84 moves upward with the first press frame 48 to separate from the pressure rod 82, under the action of the elastic force of the elastic tube 81 itself, the pressure rod 82 moves upward and resets. In summary, by controlling the elastic tube 81 to spray lubricating oil through the second press frame 84, the friction between the bearing body 31 and the water pump housing 3 can be reduced and the press-fitting efficiency can be improved.

[0045] like Figure 1 and Fig.10 As shown, it also includes a limit assembly for clamping and limiting the bearing body 31. The limit assembly is arranged on the base 1. The limit assembly includes a fixed seat 91. There are two fixed seats 91. The fixed seats 91 are respectively connected to the front and rear sides of the upper right part of the base 1. The fixed seats 91 are slidably connected with limit plates 92. The sides of the limit plates 92 that are away from each other are connected to the adjacent fixed seats 91 with sixth springs 93. The sixth springs 93 are all wound around the adjacent limit plates 92.

[0046] In order to enable the sliding clamping rod 46 to accurately grasp the bearing body 31 and make the bearing body 31 located in the center, the specific operation is as follows: when the device is in use, the limit plate 92 is first moved outward, the sixth spring 93 is deformed, and then the bearing body 31 is placed between the limit plates 92, and then the limit plates 92 are released. Under the elastic action of the sixth spring 93, the limit plates 92 move inward to clamp the bearing body 31 so that it is located in the center. In summary, the bearing body 31 is centered by the limit plates 92, thereby improving the efficiency of the sliding clamping rod 46 in grasping.

[0047] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A water pump bearing precision press-fitting device, comprising a base (1), a first fixing frame (11) connected to the top of the base (1), a second fixing frame (12) connected to the base (1), a fixing rod (2) connected to the side of the second fixing frame (12) close to the base (1), a water pump housing (3) placed on the side of the base (1) close to the second fixing frame (12), and a bearing body (31) placed on the side of the base (1) close to the first fixing frame (11); wherein: It also includes a rodless cylinder (41), which is installed between the first fixing frame (11) and the second fixing frame (12). A gas-liquid booster cylinder (42) is installed on the cylinder barrel of the rodless cylinder (41), and the telescopic portion of the gas-liquid booster cylinder (42) is connected to a first elastic telescopic rod (43). The first elastic telescopic rod (43) is connected to a connecting frame (44), the connecting frame (44) is provided with a grabbing assembly, the telescopic portion of the gas-liquid boosting cylinder (42) is connected to a first pressing frame (48), and the telescopic portion of the gas-liquid boosting cylinder (42) is provided with a separating assembly.

2. A water pump bearing precision press-fitting device according to claim 1, characterized in that: The grab assembly comprises a fixing ring (45), the fixing ring (45) is connected to the bottom of the connecting frame (44), three sliding clamping rods (46) are connected to the fixing ring (45) in a circumferentially uniform sliding manner, and first springs (47) are connected between the sides of the sliding clamping rods (46) that are away from each other and the fixing ring (45), and the first springs (47) are all wound around the adjacent sliding clamping rods (46).

3. A water pump bearing precision press-fitting device according to claim 2, characterized in that: The sliding clamping rods (46) are provided with clamping holes on the sides close to each other.

4. A water pump bearing precision press-fitting device according to claim 3, characterized in that: The separation assembly includes a connecting rod (51), the connecting rod (51) is connected to the telescopic part of the gas-liquid booster cylinder (42), a sliding plate (52) is slidably connected to the connecting frame (44), the bottom of the connecting rod (51) is in contact with the sliding plate (52), the bottom of the sliding plate (52) is evenly connected with three wedge-shaped plugs (53) along the circumferential direction, a second elastic telescopic rod (54) is connected between the sliding plate (52) and the fixing ring (45), and the wedge-shaped plug (53) is squeezed and matched with the adjacent sliding clamp rod (46).

5. A water pump bearing precision press-fitting device according to claim 4, characterized in that: It also includes a locking assembly for locking the sliding plate (52) after press-fitting. The locking assembly is arranged on the fixed ring (45). The locking assembly includes a wedge-shaped connecting rod (61). The wedge-shaped connecting rod (61) is connected to the bottom of the cylinder barrel of the rodless cylinder (41). The fixed ring (45) is connected to a connecting plate (62). A sliding wedge-shaped rod (63) is slidably connected to the connecting plate (62). A second spring (64) is connected between the sliding wedge-shaped rod (63) and the connecting plate (62). The second spring (64) is wound around the sliding wedge-shaped rod (63). The wedge-shaped connecting rod (61) and the sliding wedge-shaped rod (63) are squeezed together.

6. A water pump bearing precision press-fitting device according to claim 5, characterized in that: The invention also comprises a positioning assembly for positioning the water pump housing (3) to facilitate accurate press-fitting, the positioning assembly being arranged on the second fixing frame (12), the positioning assembly comprising a control assembly, the control assembly being arranged on the second fixing frame (12), the fixing rod (2) being slidably connected to symmetrically distributed sliding clamps (74), the symmetrically distributed sliding clamps (74) being connected to a fourth spring (75) between one side close to each other and the second fixing frame (12), and the fourth springs (75) being wound around the fixing rod (2).

7. A water pump bearing precision press-fitting device according to claim 6, characterized in that: The control assembly comprises a fixed plate (71), the fixed plate (71) is connected to the first pressing frame (48), the second fixed frame (12) is slidably connected to the sliding frame (72), a third spring (73) is connected between the sliding frame (72) and the second fixed frame (12), the third spring (73) is wound around the sliding frame (72), and the fixed plate (71) and the sliding frame (72) are pressed and matched.

8. A water pump bearing precision press-fitting device according to claim 7, characterized in that: The sides of the sliding clamping plates (74) that are close to each other are arranged in an arc shape to facilitate fitting with the water pump housing (3).

9. A water pump bearing precision press-fitting device according to claim 8, characterized in that: The invention also comprises a lubrication assembly for applying lubricating oil to the outer wall of the bearing body (31), the lubrication assembly is arranged on the second fixed frame (12), the lubrication assembly comprises an elastic tube (81), the elastic tube (81) is connected to the second fixed frame (12), the elastic tube (81) is connected to a pressure rod (82), the elastic tube (81) is connected to a nozzle (83), the first pressure frame (48) is connected to a second pressure frame (84), the second pressure frame (84) is pressed and matched with the pressure rod (82), and the nozzle (83) is evenly installed with a plurality of nozzles.

10. A water pump bearing precision press-fitting device according to claim 9, characterized in that: The bearing body (31) is also provided with a limit assembly for clamping and limiting the bearing body (31). The limit assembly is arranged on the base (1). The limit assembly includes a fixed seat (91). The fixed seat (91) is symmetrically connected to a side of the base (1) close to the bearing body (31). A limit plate (92) is slidably connected inside the fixed seat (91). A sixth spring (93) is connected between a side of the limit plate (92) that is away from each other and an adjacent fixed seat (91). The sixth spring (93) is wound around an adjacent limit plate (92).

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