A pneumatic clamping jig for bearing installation

Abstract

The utility model relates to a kind of pneumatic clamping jig for bearing installation, including sleeve, sleeve axis vertical arrangement, the inside bottom end axial of sleeve is uniformly provided with three rectangular blocks, the bottom end of sleeve is provided with the avoidance hole of one-to-one multiple rectangular blocks, the centrifugal end of rectangular block is all set as arc surface, rectangular block's middle segment is slidably installed in the inside of avoidance hole, the centripetal side of rectangular block is all set as inclined plane, the inner top of sleeve is fixedly installed with pneumatic cylinder, the telescopic rod of pneumatic cylinder is located at the bottom of pneumatic cylinder, the bottom end of telescopic rod of pneumatic cylinder is conical surface, conical surface and the inclined plane of rectangular frame are mutually matched, the bottom outside of sleeve is fixedly installed with boss, the bottom circumference of sleeve is provided with acute angle inverted blunt shape, how when using make bearing stable installation on workpiece, and it is more complex that spline groove of bearing and spline groove of part are aligned, the position of spline groove is simulated by boss in the device, so that the position of bearing is determined when clamping.

Description

Technical Field

[0001] This utility model relates to the field of parts processing technology, and in particular to a pneumatic clamping fixture for bearing installation. Background Technology

[0002] Hydraulic devices are required for the mating and assembly of bearings and shafts. Since the shaft and bearing are generally interference fit, pressure control is necessary to prevent the mounting surfaces from roughening and failing during assembly. This problem can also be further prevented by applying lubricating oil. With the increase in industrialization, the requirements for installation accuracy and quality are becoming increasingly stringent. To prevent relative rotation between the bearing and shaft after installation, spline grooves are provided on both the inner ring of the bearing and the shaft to prevent the inner ring of the bearing from rotating on its own. Therefore, ensuring that the spline grooves are aligned is particularly important. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic clamping fixture for bearing installation, so as to solve the problems existing in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A pneumatic clamping fixture for bearing installation includes a sleeve with a vertically oriented axis. Three rectangular blocks are axially and evenly arranged at the bottom of the sleeve. The bottom of the sleeve has corresponding clearance holes for the rectangular blocks. The centrifugal ends of the rectangular blocks are all arc-shaped surfaces. The middle sections of the rectangular blocks are slidably mounted inside the clearance holes. The centripetal sides of the rectangular blocks are all inclined surfaces. A cylinder is fixedly installed at the top inner end of the sleeve. The telescopic rod of the cylinder is located at the bottom of the cylinder. The bottom end of the telescopic rod is a conical surface, which cooperates with the inclined surface of the rectangular block. A protrusion is fixedly installed on the outer side of the bottom end of the sleeve. The bottom periphery of the sleeve has a blunted acute-angle shape.

[0006] By adopting the above technical solution, it is quite complex to ensure that the bearing is stably installed on the workpiece during use, and to align the spline groove of the bearing with the spline groove of the workpiece. This device uses a protrusion to simulate the position of the spline groove, so that the position of the bearing is determined during clamping. In this way, when the bearing is pressed from the bottom of the sleeve onto the workpiece by a certain device, the spline groove can be directly aligned. This device controls the space on the centripetal side of the rectangular block by the lifting and lowering of the cylinder, thereby realizing the function of pushing out the rectangular block during the descent. Through the cooperation of the centrifugal sides of multiple rectangular blocks, the bearing is clamped.

[0007] In a further embodiment, the rectangular block has a threaded hole at one end inside the sleeve, and a locking bolt is screwed into the threaded hole.

[0008] By adopting the above technical solution, since the rectangular block is slidably installed in the through hole, a locking bolt is used to restrict it in order to prevent the rectangular block from sliding out completely.

[0009] In a further embodiment, a pressure sensor corresponding to a rectangular block is provided at the bottom end of the cylinder's telescopic rod. The pressure sensor is located between the centripetal side of the rectangular block and the contact surface of the telescopic rod.

[0010] By adopting the above technical solution, the clamping force can be controlled each time. In actual use, after all the rectangular blocks are installed, the rectangular blocks are driven to the maximum position of centrifugal motion by the telescopic rod. Then, the entire device is placed on a lathe and the centrifugal side of the multiple rectangular blocks is machined to ensure the coaxiality of the multiple rectangular blocks.

[0011] In a further embodiment, the bottom end of the sleeve is provided with an end cap, which is used to completely seal the bottom end of the sleeve.

[0012] By adopting the above technical solution, impurities are prevented from entering the sleeve.

[0013] In a further embodiment, each of the locking bolts is connected to one end of a return spring, and the other end of the return spring is fixedly connected to the inside of the sleeve.

[0014] By adopting the above technical solution, the reset spring is used to drive the rectangular block to move inward.

[0015] In a further embodiment, the bottom wall thickness of the sleeve is greater than the top wall thickness of the sleeve.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. Ensuring stable bearing mounting on the workpiece and aligning the bearing's spline groove with the workpiece's spline groove is complex. This device uses protrusions to simulate the spline groove position, allowing the bearing's position to be determined during clamping. When the bearing is pressed onto the workpiece from the bottom of the sleeve using a certain device, its spline groove can be directly aligned. This device controls the movement of the rectangular blocks' centripetal side via cylinder lifting, thus ejecting the rectangular blocks during descent. The clamping effect of the bearing is achieved through the cooperation of the centrifugal sides of multiple rectangular blocks. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating the internal structure of the sleeve used to demonstrate this utility model;

[0020] Figure 3 It is a structural diagram used to illustrate the connection relationship between the rectangular block and the sleeve.

[0021] In the diagram, 1 is a sleeve; 2 is a rectangular block; 3 is a cylinder; 4 is a protrusion; 5 is an end cap; and 6 is a return spring. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0024] Example 1:

[0025] like Figures 1-3As shown, a pneumatic clamping fixture for bearing installation includes a sleeve 1 with its axis vertically aligned. Three rectangular blocks 2 are evenly arranged axially at the bottom of the sleeve 1. Each bottom of the sleeve 1 has a corresponding clearance hole for one of the rectangular blocks 2. The centrifugal ends of the rectangular blocks 2 are all arc-shaped surfaces. The middle sections of the rectangular blocks 2 are slidably mounted inside the clearance holes. The centripetal sides of the rectangular blocks 2 are all inclined surfaces. A cylinder 3 is fixedly mounted on the top inner side of the sleeve 1. The telescopic rod of the cylinder 3 is located at the bottom of the cylinder 3. The bottom end of the telescopic rod of the cylinder 3 is a conical surface, which cooperates with the inclined surface of the rectangular blocks. A protrusion 4 is fixedly mounted on the outer side of the bottom of the sleeve 1. The bottom periphery of the sleeve 1 has a blunted acute-angle shape. One end of each rectangular block 2 inside the sleeve 1 has a threaded hole, and a locking mechanism is screwed into the threaded hole. One end of the bolt; the bottom end of the cylinder 3's telescopic rod is equipped with a pressure sensor corresponding to a rectangular block 2. The pressure sensor is located between the centripetal side of the rectangular block 2 and the contact surface of the telescopic rod, so that the clamping force is controllable each time. In actual use, after all the rectangular blocks are installed, the telescopic rod drives the rectangular blocks to the maximum position of centrifugal motion. Then, the entire device is placed on a lathe, and the centrifugal sides of multiple rectangular blocks are machined to ensure the coaxiality of multiple rectangular blocks. The bottom end of the sleeve 1 is equipped with an end cap 5, which is used to completely seal the bottom end of the sleeve 1. Each locking bolt is connected to one end of a return spring 6, and the other end of the return spring 6 is fixedly connected to the inside of the sleeve 1. The bottom wall thickness of the sleeve 1 is greater than the top wall thickness of the sleeve 1.

[0026] Specific implementation process: Ensuring stable bearing mounting on the workpiece and aligning the bearing's spline groove with the workpiece's spline groove is complex. This device uses protrusions to simulate the spline groove position, allowing the bearing's position to be determined during clamping. Thus, when the bearing is pressed from the bottom of the sleeve onto the workpiece using a certain device, its spline groove can be directly aligned. This device controls the movement of the rectangular blocks' centripetal side through cylinder lifting, thereby ejecting the rectangular blocks during descent. The clamping of the bearing is achieved through the cooperation of the centrifugal sides of multiple rectangular blocks.

[0027] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A pneumatic clamping fixture for bearing mounting, characterized in that: Includes a sleeve (1), the sleeve (1) is vertically oriented, and three rectangular blocks (2) are axially and evenly arranged at the bottom of the sleeve (1). The bottom of the sleeve (1) is provided with a clearance hole corresponding to multiple rectangular blocks (2). The centrifugal ends of the rectangular blocks (2) are all set as arc surfaces. The middle section of the rectangular blocks (2) is slidably installed inside the clearance hole. The centripetal side of the rectangular blocks (2) is all set as an inclined surface. A cylinder (3) is fixedly installed on the top of the sleeve (1). The telescopic rod of the cylinder (3) is located at the bottom of the cylinder (3). The bottom end of the telescopic rod of the cylinder (3) is a conical surface. The conical surface cooperates with the inclined surface of the rectangular frame. A protrusion (4) is fixedly installed on the outer side of the bottom end of the sleeve (1). The bottom periphery of the sleeve (1) is provided with an acute angled blunt shape.

2. The pneumatic clamping fixture for bearing installation according to claim 1, characterized in that: The rectangular block (2) has a threaded hole at one end inside the sleeve (1), and a locking bolt is screwed into the threaded hole.

3. The pneumatic clamping fixture for bearing installation according to claim 1, characterized in that: The bottom end of the telescopic rod of the cylinder (3) is provided with a pressure sensor corresponding to a rectangular block (2), and the pressure sensor is located between the centripetal side of the rectangular block (2) and the contact surface of the telescopic rod.

4. The pneumatic clamping fixture for bearing installation according to claim 1, characterized in that: The bottom end of the sleeve (1) is provided with an end cap (5), which is used to completely seal the bottom end of the sleeve (1).

5. A pneumatic clamping fixture for bearing installation according to claim 2, characterized in that: Each of the locking bolts is connected to one end of a return spring (6), and the other end of the return spring (6) is fixedly connected to the inside of the sleeve (1).

6. A pneumatic clamping fixture for bearing installation according to claim 1, characterized in that: The bottom wall thickness of the sleeve (1) is greater than the top wall thickness of the sleeve (1).

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