Turning clamp for improving concentricity of end cover bearing chamber and boss

Abstract

The utility model relates to a turning clamp for improving concentricity of an end cover bearing chamber and a boss, and belongs to the technical field of clamps, the turning clamp comprises a positioning chuck, a positioning pin, a pressing plate, an internal expansion core rod, an expansion core rod and a screw, an annular positioning block is arranged on the positioning chuck, the internal expansion core rod is fixed in the middle of the annular positioning block, and the positioning pin is arranged on the positioning chuck. A center hole is formed in the middle of the inner expansion core rod, a threaded hole is formed in the position, corresponding to the center hole, of the positioning chuck, the expansion core rod can penetrate through the center hole to be connected into the threaded hole in the positioning chuck in a threaded mode, the pressing plate is fixed to the positioning chuck through a screw, and the positioning pin is fixed to the annular positioning block. The motor end cover can be rapidly clamped and positioned, the bearing chamber in the motor end cover is matched with the internal expansion core rod for positioning, the machining precision can be improved easily (the concentricity of the bearing chamber and the end cover boss can be controlled to be smaller than or equal to 0.02 mm), the connecting precision of the motor and the pump head can be improved, and the service life of the motor and the pump head can be prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of clamps, in particular to a clamp for improving the concentricity of a bearing chamber of an end cover and a boss. BACKGROUND

[0002] The motor end cover 1 is a part fixed with a water pump head, the boss of the motor end cover cooperates with the water pump head to realize accurate positioning, so that the rotating shaft in the motor and the water pump head are on the same axis. The rotating shaft has a bearing, the bearing is in sliding cooperation with the bearing chamber of the end cover, and the rotating shaft rotates to drive the internal structure of the pump head to realize water pumping.

[0003] In order to ensure that the rotating shaft and the water pump head are on the same axis, the concentricity of the bearing chamber 11 of the end cover and the boss 12 of the end cover needs to be ensured. Since the boss of the end cover and the bearing chamber are not on the same plane, the machining often needs to be machined twice. However, the concentricity of the boss of the end cover and the bearing chamber cannot be ensured after repeated clamping.

[0004] Therefore, it is urgent to develop a clamp which can ensure the concentricity of the boss of the end cover and the bearing chamber during the second clamping. Practical new type content

[0005] The application aims to provide a clamp for improving the concentricity of the bearing chamber of the end cover and the boss, so as to solve the problems in the background.

[0006] In order to achieve the above-mentioned purpose, the application provides a clamp for improving the concentricity of the bearing chamber of the end cover and the boss, which adopts the following technical scheme:

[0007] The clamp for improving the concentricity of the bearing chamber of the end cover and the boss is used for positioning and clamping the motor end cover, and comprises a positioning chuck, a positioning pin, a pressing plate, an inner expanding core rod, an expanding core rod and a screw.

[0008] The end part of the positioning pin is in the shape of a circular truncated cone, and the positioning pin is matched with a screw hole in the motor end cover.

[0009] The number of the pressing plates is two, the two pressing plates are symmetrically fixed on the positioning chuck through the screw, and the pressing plate is provided with an inclined surface corresponding to the position of the motor end cover.

[0010] The core rod includes a rod body and a core part, the core part can expand the inner core rod, a hexagonal hole is arranged on the end face of the core part, and a threaded groove is arranged on the end surface of the rod body.

[0011] Preferably, in order to facilitate the installation of the pressing plate, a placing groove is arranged on the positioning chuck at a position corresponding to the pressing plate.

[0012] In summary, the present application has at least one of the following beneficial technical effects: the clamp for improving the concentricity of the bearing chamber and the boss of the end cover can quickly clamp and position the motor end cover, the bearing chamber in the motor end cover is positioned by cooperating with the inner core rod, which is conducive to improving the machining precision (the concentricity of the bearing chamber and the boss of the end cover can be controlled within ≤0.02mm), improving the precision of the connection between the motor and the pump head, and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic diagram of a motor end cover in the prior art.

[0014] Figure 2 is a structural schematic diagram of a motor end cover in the prior art.

[0015] Figure 3 is a structural schematic diagram of a motor end cover in the prior art.

[0016] Mark for explanation: 2, positioning chuck; 21, annular positioning block; 211, positioning pin; 22, threaded hole; 3, pressing plate; 4, inner core rod; 5, core rod; 51, rod body; 52, core part; 521, hexagonal hole; 6, screw. DETAILED DESCRIPTION

[0017] The following will be described in detail in combination with the accompanying drawings Figures 2-3 The present application will be further described in detail.

[0018] The present application discloses a clamp for improving the concentricity of the bearing chamber and the boss of the end cover, which is used for positioning and clamping the motor end cover, and refers to Figures 2-3 , including a positioning chuck 2, a positioning pin 211, a pressing plate 3, an inner core rod 4, a core rod 5, and a screw 6, the positioning chuck 2 is provided with an annular positioning block 21, the inner core rod 4 is fixed in the middle part of the annular positioning block 21, a center hole is arranged in the middle part of the inner core rod 4, the positioning chuck 2 is provided with a threaded hole 22 at a position corresponding to the center hole, the core rod 5 can be threadedly connected in the threaded hole 22 in the positioning chuck 2 through the center hole, the pressing plate 3 is fixed on the positioning chuck 2 by the screw 6, the positioning pin 211 is fixed on the annular positioning block 21, the end part of the positioning pin 211 is in the shape of a circular truncated cone, and the positioning pin 211 is matched with the screw hole in the motor end cover.

[0019] The present application discloses a clamp for improving the concentricity of the bearing chamber and the boss of the end cover, which is used for positioning and clamping the motor end cover, and refers to Figures 2-3The number of the pressing plates 3 is two, and the two pressing plates 3 are symmetrically fixed on the positioning chuck 2 through the screws 6. The pressing plate 3 is provided with an inclined surface corresponding to the position of the motor end cover. In order to facilitate the placement of the pressing plate 3, the positioning chuck 2 is provided with a placement groove corresponding to the position of the pressing plate 3.

[0020] With reference to Figure 3 The core rod 5 includes a rod body 51 and a core part 52. The core part 52 can expand the inner core rod 4. The end surface of the core part 52 is provided with an internal hexagon hole 521. The end surface of the rod body 51 is provided with a threaded groove.

[0021] The implementation principle of the fixture for improving the concentricity between the bearing chamber and the boss of the end cover is as follows:

[0022] In use, the motor end cover is placed with the bearing chamber side facing the positioning chuck 2, and is positioned and placed through the positioning pin 211 and the screw hole on the motor end cover. The bearing chamber of the motor end cover is sleeved on the inner core rod 4. The two pressing plates 3 are pressed on the positioning chuck 2 through the screws 6. The core rod 5 is inserted through the inner core rod 4. The inner core rod 4 is expanded by the core part 52, so that the inner core rod 4 is in interference fit with the bearing chamber in the motor end cover, and the concentricity between the bearing chamber and the boss of the end cover is effectively improved.

[0023] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A jig for machining to improve the concentricity of the bearing housing and the boss of an end cover, used for positioning and clamping the motor end cover, characterized in that: It includes positioning chuck (2), positioning pin (211), pressing plate (3), inner expanding mandrel (4), expanding mandrel rod (5) and screw (6), the positioning chuck (2) is provided with annular positioning block (21), the inner expanding mandrel (4) is fixed in the middle part of the annular positioning block (21), the inner expanding mandrel (4) is provided with a central hole in the middle part, the positioning chuck (2) is provided with a threaded hole (22) corresponding to the position of the central hole, the expanding mandrel rod (5) can be screwed in the threaded hole (22) in the positioning chuck (2) through the central hole, the pressing plate (3) is fixed on the positioning chuck (2) by the screw (6), and the positioning pin (211) is fixed on the annular positioning block (21).

2. The fixture for improved machining of the concentricity of the end cap bearing chamber with the boss of claim 1, wherein: The end of the positioning pin (211) is in the shape of a circular truncated cone, and the positioning pin (211) is matched with the screw hole in the motor end cover.

3. The fixture for machining improved concentricity of the end cap bearing chamber to the boss of Claim 1, wherein: The number of the pressing plate (3) is two, and the two pressing plates (3) are symmetrically fixed on the positioning chuck (2) by screws (6), and the pressing plate (3) is provided with an inclined surface corresponding to the position of the motor end cover.

4. The fixture for machining end cap bearing chamber concentricity to boss of claim 1, wherein: The expanding mandrel rod (5) includes a rod body (51) and an expanding mandrel part (52), the expanding mandrel part (52) can expand the inner expanding mandrel (4), and the end surface of the expanding mandrel part (52) is provided with an internal hexagonal hole (521), and the end surface of the rod body (51) is provided with a threaded groove.

5. The fixture for machining end cap bearing chamber concentricity to boss of claim 3, wherein: The positioning chuck (2) is provided with a placing groove corresponding to the position of the pressing plate (3).

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