Tool clamp for waterproof sleeve in electronic shielding water pump

Abstract

The utility model relates to a tool clamp for a waterproof sleeve in an electronic shielding water pump. A base is arranged below a waterproof sleeve shell, an elastic expansion sleeve is arranged between the waterproof sleeve shell and the base, a ceramic bearing is arranged outside the elastic expansion sleeve in a sleeved mode, a pressing plate is arranged in the elastic expansion sleeve in a sleeved mode, a protruding centering shaft body is arranged on the base, and the pressing plate corresponds to the centering shaft body. A clamping assembly is arranged between the pressing plate and the centering shaft body, a bolt is arranged in the pressing plate in a penetrating mode, and a bolt hole matched with the bolt is formed in the top of the centering shaft body. During use, the waterproof sleeve shell and the ceramic bearing are subjected to integral injection molding to form the waterproof sleeve, then the elastic expansion sleeve is used for fixing and clamping the waterproof sleeve, clamping deformation is reduced, the clamping force can be further adjusted and controlled through matched stretching and retracting of the bolt and the elastic expansion sleeve, the coaxiality of the waterproof sleeve is accurately adjusted, and the waterproof sleeve is not prone to deformation. The coaxiality progress of the waterproof sleeve can be improved to IT7 level, the coaxiality of the waterproof sleeve is effectively corrected through the elastic expansion sleeve, the overall efficiency of the motor shaft is improved, and the service life of the motor shaft is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile electronic shielding water pump, specifically a tool fixture for water jacket in electronic shielding water pump. BACKGROUND

[0002] In prior art, the realization mode of high-power miniaturized automobile electronic shielding water pump generally cannot do without water jacket, the water jacket is a part arranged at the position of the gap between the stator and the rotor to separate the water inside the water pump from the water outside the stator, generally made of plastic material with insulation, no magnetic disturbance, and certain temperature resistance and strength. During production, injection molding process is often used for batch production, but due to the technical requirements of the size and thin wall of the water jacket, as well as the problems of mold precision and the deformation of the plastic material itself, the coaxiality is poor, affecting batch production and assembly.

[0003] At the same time, if the coaxiality of the water jacket itself is poor, even secondary machining of the machine tool cannot improve its coaxiality. Moreover, since the water jacket contains ceramic bearings, poor coaxiality of the water jacket will result in poor coaxiality of the ceramic bearings, affecting the operation of the motor shaft, increasing the risk of bore and abnormal noise. Furthermore, poor coaxiality of the water jacket will also increase the air gap, thereby causing the overall efficiency of the motor to decrease.

[0004] Therefore, there is an urgent need in the market for a new tool fixture for water jacket in electronic shielding water pump, which can effectively and accurately correct the coaxiality of the water jacket. SUMMARY

[0005] The utility model aims at providing an improved tool fixture for water jacket in electronic shielding water pump, which can effectively correct the coaxiality of the water jacket and improve the service life of the overall machine and bearings through structural improvement.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a tool fixture for water jacket in electronic shielding water pump, comprising a water jacket shell and a ceramic bearing arranged in the water jacket shell, characterized in that: a base is arranged below the water jacket shell, an elastic expansion sleeve is arranged between the water jacket shell and the base, the ceramic bearing is arranged outside the elastic expansion sleeve, a pressing plate is arranged inside the elastic expansion sleeve, a protruding centering shaft body is arranged on the base, the pressing plate is arranged corresponding to the centering shaft body, a clamping assembly is arranged between the pressing plate and the centering shaft body, a bolt is arranged through the pressing plate, and a bolt hole is arranged on the top of the centering shaft body and matched with the bolt.

[0007] Preferably, the outer surface of the elastic expansion sleeve is provided with anti-skid lines, and the inner surface is provided with a plurality of expansion grooves along the axial direction, and the spacing between adjacent expansion grooves is equal.

[0008] Further, the clamping assembly comprises a spring and 6-12 sliding balls embedded in the spring, and the intervals between adjacent sliding balls are equal.

[0009] Further, the expansion groove runs through the whole elastic sleeve, and the expansion groove is a circular arc groove or a triangular groove.

[0010] Further, the elastic sleeve is made of polyurethane composite material, the top of the elastic sleeve is provided with a through hole matched with a bolt, and the length of the bolt is 2-3 times the height of the pressing plate.

[0011] Further, the ceramic bearing is a silicon carbide ceramic bearing, and the silicon carbide ceramic bearing is integrally injection molded with the water-proof sleeve.

[0012] Compared with the prior art, the technical scheme of the utility model not only has the improvement of the overall technical scheme, but also has the improvement of many details, and specifically has the following beneficial effects:

[0013] 1. The improved scheme, the elastic sleeve is arranged between the water-proof sleeve and the base, the ceramic bearing sleeve is arranged outside the elastic sleeve, the pressing plate is arranged in the elastic sleeve, the pressing plate is arranged in correspondence with the centering shaft body, the clamping assembly is arranged between the pressing plate and the centering shaft body, the coaxiality of the water-proof sleeve is effectively corrected through the elastic sleeve, and the overall efficiency and service life of the motor shaft are improved.

[0014] 2. In the technical scheme, the outer surface of the elastic sleeve is provided with anti-skid lines, and the inner surface is provided with a plurality of expansion grooves in the axial direction, and the intervals between adjacent expansion grooves are equal. The elastic sleeve can be elastically stretched to a certain extent, the coaxiality of the water-proof sleeve can be accurately adjusted, the problem of motor shaft shaking and abnormal sound is solved, and the risk of rotor sweep is reduced.

[0015] 3. In the structure, the elastic sleeve can be automatically centered, the clamping assembly is pressed by the bolt, effective clamping is realized, clamping deformation is reduced, the coaxiality precision of the water-proof sleeve can be improved to IT7 level, and the water-proof sleeve is suitable for batch production of high-precision water-proof sleeves.

[0016] 4. The utility model has the advantages of simple structure, reasonable layout, convenient use, good coaxiality correction effect, and is convenient to popularize and utilize. DRAWINGS

[0017] Figure 1 It is an explosion structure schematic view of the utility model.

[0018] Figure 2 It is a structure schematic view of the utility model in use.

[0019] Figure 3 It is Figure 2 A-A sectional view.

[0020] Reference signs:

[0021] 1 water jacket, 2 ceramic bearing, 3 bolt, 4 pressing plate, 5 elastic expansion sleeve, 6 base, 7 sliding ball, 8 spring;

[0022] 61 centering shaft body. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] The utility model provides a kind of tool fixture for electronic shielding water pump middle water jacket, including water jacket 1 and the ceramic bearing 2 being arranged in water jacket, referring to specifically Figure 1 It is different from prior art in that: the lower portion of water jacket is provided with a base 6, an elastic expansion sleeve 5 is arranged between the water jacket and the base, the ceramic bearing sleeve is arranged outside the elastic expansion sleeve, a pressing plate 4 is sleeved inside the elastic expansion sleeve, a protruding centering shaft body 61 is arranged on the base, the pressing plate is arranged corresponding to the centering shaft body, a clamping assembly is arranged between the pressing plate and the centering shaft body, a bolt 3 is arranged through the pressing plate, and a bolt hole is arranged on the top of the centering shaft body to cooperate with the bolt.

[0025] When used, the water jacket and the ceramic bearing are integrally injection molded to form a water jacket, then the elastic expansion sleeve is used to fix and clamp the water jacket, reduce clamping deformation, and further adjust and control clamping force by the cooperation and expansion of the bolt and the elastic expansion sleeve, accurately adjust the coaxiality of the water jacket, and improve the coaxiality precision of the water jacket to IT7 level (≤0.02mm), effectively correct the coaxiality of the water jacket by the elastic expansion sleeve, and improve the overall efficiency and service life of the motor shaft.

[0026] Embodiment 1

[0027] In this embodiment, the lower portion of the water jacket 1 is provided with a corresponding base 4, the water jacket and the base are effectively connected by an elastic expansion sleeve 5, the ceramic bearing sleeve is arranged outside the elastic expansion sleeve, the pressing plate 4 is sleeved inside the elastic expansion sleeve, the protruding centering shaft body is arranged on the base, the pressing plate is arranged corresponding to the centering shaft body, the clamping assembly is arranged between the pressing plate and the centering shaft body, the bolt 3 is arranged through the pressing plate, and the bolt hole is arranged on the top of the centering shaft body to cooperate with the bolt. The pressing plate and the centering shaft body are effectively connected by the bolt, and the clamping assembly is further adjusted by adjusting the expansion of the bolt, to ensure the uniformity and effectiveness of clamping force.

[0028] Specifically, the elastic sleeve outer surface is provided with anti-skid lines, which can be serpentine lines or diamond lines, or anti-skid dots with protrusions on the surface, to ensure the friction between the elastic sleeve and the ceramic bearing, so as to improve the accuracy and reliability when adjusting the coaxiality of the water isolation sleeve.

[0029] Meanwhile, the inner surface of the elastic sleeve 5 is provided with a plurality of expansion grooves along the axial direction, and the spacing between adjacent expansion grooves is equal. The expansion grooves penetrate through the entire elastic sleeve, and the expansion grooves are circular arc grooves or triangular grooves. The elastic sleeve is made of polyurethane composite material, and the top of the elastic sleeve is provided with a through hole matched with the bolt, and the length of the bolt is 2-3 times the height of the pressing plate. Therefore, when the bolt is stretched and contracted, the inner side wall of the elastic sleeve can be effectively pressed by the clamping assembly. Since the expansion grooves are uniformly arranged, the elastic sleeve can be uniformly expanded or contracted along the circumferential direction, the elastic sleeve uniformly applies force to the ceramic bearing, the deformation during clamping is reduced, and the product precision is improved.

[0030] Further, since the elastic sleeve can be elastically deformed, it is convenient to accurately adjust the coaxiality of the water isolation sleeve, and the problem of motor shaft wobble and abnormal sound can be solved, and the risk of rotor sweep bore is reduced.

[0031] Embodiment 2

[0032] In this embodiment, the water isolation sleeve shell 1 and the ceramic bearing 2 arranged in the water isolation sleeve shell are included, the bottom of the water isolation sleeve shell is provided with a base, the elastic sleeve 5 is arranged between the water isolation sleeve shell and the base, the ceramic bearing is arranged outside the elastic sleeve, the elastic sleeve is arranged inside the pressing plate 4, the base is provided with a protruding centering shaft body 61, the pressing plate and the centering shaft body are arranged corresponding to the longitudinal axis, the clamping assembly is arranged between the pressing plate and the centering shaft body, a bolt is arranged through the pressing plate, and the centering shaft body is provided with a bolt hole matched with the bolt, so that the pressing plate and the centering shaft body are effectively connected through the bolt.

[0033] Specifically, the device can improve the forming process precision of the coaxiality of the water isolation sleeve, and the forming process includes the following steps:

[0034] S1. Injection molding process stage: apply adhesive on the silicon carbide ceramic bearing, and integrally injection mold the silicon carbide ceramic bearing and the water isolation sleeve shell.

[0035] S2. Post-processing stage: use the elastic sleeve to fix the integrally injection molded structure made in step S1, and perform fine machining with the ceramic bearing inner hole as the reference, and the machining allowance is 0.05-0.1mm.

[0036] The elastic sleeve 5 effectively clamps the water-proof sleeve, and the expansion and contraction of the bolt 3 makes the elastic sleeve expand or contract uniformly along the circumferential direction, so that the elastic sleeve uniformly applies force to the ceramic bearing, reduces the deformation during clamping, and improves the coaxial accuracy of the water-proof sleeve to IT7 level, which is suitable for mass production of high-precision water-proof sleeves.

[0037] Further, the outer surface of the elastic sleeve 5 is provided with anti-skid lines, and the inner surface is provided with a plurality of expansion grooves along the axial direction, the spacing between adjacent expansion grooves is equal, the elastic sleeve is made of polyurethane composite material, and the Shore hardness is 80A-90A. The clamping assembly includes a spring 8 and 6-12 slide balls 7 embedded in the spring, preferably 8 slide balls, the spacing between adjacent slide balls is equal, the structure of the spring embedded with slide balls is prior art, and the specific structure and working principle will not be described here. The elastic sleeve here can be elastically stretched and contracted, which is convenient for accurately adjusting the coaxiality of the water-proof sleeve, solving the problem of motor shaft wobble and abnormal sound, and reducing the risk of rotor sweep bore.

[0038] The above is a further detailed description of the present application in combination with a specific preferred embodiment, which cannot be regarded as a limitation of the specific implementation of the present application to the above description. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the present application.

Claims

1. A tooling fixture for use in the electronic shielding of a water jacket of a water pump, comprising a water jacket shell and a ceramic bearing disposed in the water jacket shell, characterized by: The lower part of the water-proof sleeve is provided with a base, the water-proof sleeve and the base are provided with an elastic sleeve, the ceramic bearing sleeve is arranged outside the elastic sleeve, the elastic sleeve is provided with a pressing plate, the base is provided with a protruding centering shaft body, the pressing plate is arranged correspondingly to the centering shaft body, the pressing plate and the centering shaft body are provided with a clamping assembly, a bolt is arranged through the pressing plate, and the top of the centering shaft body is provided with a bolt hole matched with the bolt.

2. A tooling fixture for a water jacket of an electronic shielded water pump according to claim 1, wherein: The outer surface of the elastic sleeve is provided with anti-skid lines, and the inner surface is provided with a plurality of expansion grooves along the axial direction.

3. A tooling fixture for a water jacket of an electronic shielded water pump according to claim 1, wherein: The clamping assembly comprises a spring and 6-12 sliding beads embedded in the spring, and the spacing between adjacent sliding beads is equal.

4. A tooling fixture for a water jacket of an electronic shielded water pump according to claim 2, wherein: The expansion grooves penetrate through the entire elastic sleeve, and the expansion grooves are circular arc grooves or triangular grooves.

5. A tooling fixture for use in the electronic shielding of a water jacket of a water pump as defined in claim 1, wherein: The elastic sleeve is made of polyurethane composite material, the top of the elastic sleeve is provided with a through hole matched with the bolt, and the length of the bolt is 2-3 times the height of the pressing plate.

6. A tooling fixture for use in the electronic shielding of a water jacket of a water pump as defined in claim 1, wherein: The ceramic bearing is made of silicon carbide ceramic bearing, and the silicon carbide ceramic bearing is integrally injection molded with the water-proof sleeve.

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