Small motor bearing dismounting device based on hydraulic transmission

Abstract

The utility model relates to the field of dismounting tools, in particular to a small motor bearing dismounting device based on hydraulic transmission, which comprises a retainer, a movable frame which is arranged on the retainer and is driven by an adjusting mechanism to move vertically, and a hydraulic cylinder with a piston rod extending downwards is arranged on the movable frame. A supporting plate used for supporting a bearing is detachably installed at the lower end of the retainer, the supporting plate is horizontally arranged, an open groove allowing a motor shaft to enter is formed in the supporting plate, the horizontal end of the open groove is open, and the open groove is located under a piston rod of the hydraulic cylinder; a vertically-extending connecting column is fixedly installed at the lower end of the holder, a U-shaped groove allowing the connecting column to enter is formed in the supporting plate, the horizontal end of the U-shaped groove is provided with an opening, and a check block used for supporting the supporting plate is fixedly installed at the lower end of the connecting column. According to the diameter of the motor shaft, the supporting plate with the opening groove of the corresponding size is installed at the lower end of the retainer, and therefore bearing dismounting work of the motor shafts of different diameters is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of dismounting tool, concretely relates to a small -size motor bearing dismounting device based on hydraulic drive. BACKGROUND

[0002] In modern industrial production and various mechanical equipment applications, small motors are widely used in electronic equipment, medical equipment, office equipment and small industrial machinery and many other fields due to their small size, low energy consumption, easy installation and maintenance and other advantages. The stable operation of small motors plays a crucial role in the normal operation of the entire equipment system, and motor bearings, as key components of small motors, bear the important responsibilities of supporting motor rotors, reducing rotational friction and ensuring rotational accuracy.

[0003] However, small motor bearings will inevitably be damaged or have reduced performance during long-term operation due to factors such as mechanical wear, fatigue stress, lubrication failure, temperature changes and impurity intrusion. Once the bearing fails, such as ball wear, raceway scratches, cage deformation, etc., it will directly cause the motor to produce abnormal vibration, increase noise, rotate unsmoothly or even stop, etc. serious problems, thereby affecting the normal use of the equipment, reducing production efficiency and increasing maintenance costs.

[0004] In the prior art, a utility model patent with application number CN202420589565.7 discloses a small motor bearing dismounting device, which includes a bolt, a first nut, a screw rod, a second nut, a sleeve ring and a clamping rod. The bolt has a sharp end, the first nut is threadedly installed on the bolt, two symmetrically arranged screw rods are fixedly installed on the first nut, the second nut is threadedly installed on the screw rod, the sleeve ring is movably sleeved on the screw rod between the first nut and the second nut, the inner diameter of the sleeve ring is larger than the outer diameter of the screw rod, the sleeve ring is fixedly connected with the clamping rod, and a clamping gap for clamping the motor bearing is formed at the end of the clamping rod away from the sleeve ring. When dismounting the bearing, the bearing is clamped into the two clamping gaps at the same time, the sharp end of the bolt is rotated into the rotor of the motor, the rotor shaft is moved axially, and the rotor and the bearing are separated.

[0005] However, when the above dismounting device is used to dismount bearings with a diameter smaller than the outer diameter of the first nut, it is necessary to manually hold the two clamping rods so that the free ends of the clamping rods move towards the center of the bolt. On the one hand, this increases the difficulty of dismounting the bearing, and on the other hand, the rotor shaft is prone to skewing relative to the bolt during the dismounting process, the bolt exerts uneven force, causing the rotor shaft to bend and deform, resulting in unnecessary economic losses. UTILITY MODEL CONTENTS

[0006] The utility model discloses a purpose lies in providing a kind of small motor bearing dismounting device based on hydraulic transmission, it is convenient for different diameter motor shaft use, to solve the defect proposed in above background art.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A kind of small motor bearing dismounting device based on hydraulic transmission, including retainer, the retainer is equipped with movable rack by adjusting mechanism drives vertical movement, the movable rack is installed with the hydraulic cylinder of piston rod extending downward, the lower end of the retainer is detachably installed with the supporting plate for dragging bearing, the supporting plate is horizontally arranged, and the opening slot for motor shaft is entered is equipped on the supporting plate, the horizontal one end of the opening slot is open, and the opening slot is located the lower side of the piston rod of the hydraulic cylinder;The lower end of the retainer is fixedly installed with the connection column extending vertically, the U-shaped groove for the connection column is entered is equipped on the supporting plate, the horizontal one end of the U-shaped groove is open, and the lower end of the connection column is fixedly installed with the stopper for supporting the supporting plate.

[0009] As further improvement, the retainer includes two vertical rods oppositely arranged, and the upper ends of the two vertical rods are fixedly installed on the same horizontal rod.

[0010] As further improvement, the adjusting mechanism includes a vertically extending screw rod rotatably installed on the top of the movable rack, and the screw rod is threadedly connected to the horizontal rod.

[0011] As further improvement, the lower ends of the two vertical rods are fixedly installed with fixing seats respectively, the two connection columns arranged side by side in front of and behind are fixedly installed on the bottom of each fixing seat respectively, the U-shaped grooves with open front ends are arranged on the left and right ends of the supporting plate respectively, and the two connection columns on the same fixing seat simultaneously enter the U-shaped groove on the corresponding side.

[0012] As further improvement, the bottom of the supporting plate is provided with a positioning groove for clamping the stopper.

[0013] As further improvement, a pressing plate is vertically slidably installed on the connection column above the stopper, a spring for pushing the pressing plate downward is sleeved on the connection column above the pressing plate, and the supporting plate is installed between the pressing plate and the stopper.

[0014] As further improvement, the lower end of the piston rod of the hydraulic cylinder is detachably installed with a coaxially arranged jacking rod.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1、The application facilitates the installation of a supporting plate with a corresponding size opening slot at the lower end of the retainer according to the diameter of the motor shaft, thereby realizing the bearing dismounting work of the motor shaft with different diameters, improving the stability of the hydraulic cylinder force during bearing dismounting, and avoiding the deformation of the motor shaft;

[0017] 2、When assembling, the U-shaped slot on the supporting plate is sleeved on the connecting column, and the bottom of the supporting plate is supported by the stopper, then the bearing is placed on the top of the supporting plate, and the motor shaft passes through the opening slot, the rotating screw drives the movable frame and the hydraulic cylinder to move downward as a whole, the top rod at the lower end of the hydraulic cylinder piston rod abuts against the upper end of the motor shaft, which plays a pressing and fixing role on the motor shaft and the bearing, thereby improving the stability during bearing dismounting;

[0018] 3、When the supporting plate is installed in place, the pushing force of the spring acts on the pressing plate and pushes the supporting plate to move downward relative to the connecting column, so that the stopper is clamped into the corresponding positioning slot, which plays a role in limiting the forward and backward movement of the supporting plate, and the supporting plate is not easy to fall off from the connecting column, and the installation of the supporting plate is more stable;

[0019] 4、The application facilitates the installation of a suitable size top rod at the lower end of the piston rod of the hydraulic cylinder according to the diameter of the motor shaft, so that the top rod can pass through the inner ring of the bearing downward to completely push out the motor shaft. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] Figure 1 is a structural schematic view of the embodiment of the present application;

[0022] Figure 2 is Figure 1 a structural schematic view of another view of the embodiment of the present application;

[0023] Figure 3 is a structural schematic view of the supporting plate of the embodiment of the present application;

[0024] Figure 4 is a structural schematic view of the top rod of the embodiment of the present application.

[0025] In the diagram: 1-Cage; 2-Vertical rod; 3-Horizontal rod; 4-Modible frame; 5-Vertical plate; 6-Horizontal plate; 7-Hydraulic cylinder; 8-Slide groove; 11-Screw; 12-Support plate; 13-Opening groove; 14-Fixed seat; 15-Connecting column; 16-U-shaped groove; 17-Stop block; 18-Positioning groove; 19-Pressure plate; 20-Spring; 21-Top rod; 22-Mounting seat; 23-Slot; 24-Insertion block; 25-Tightening bolt; 26-Bearing; 27-Motor shaft. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 4 As shown, a small motor bearing disassembly device based on hydraulic transmission includes a retainer 1. The retainer 1 includes two vertical rods 2 arranged opposite each other on the left and right sides. The upper ends of the two vertical rods 2 are fixedly installed on the same horizontal rod 3 by bolts.

[0028] The retainer 1 is equipped with a movable frame 4 that is driven to move vertically by an adjustment mechanism. The movable frame 4 includes two vertical plates 5 arranged opposite each other on the left and right sides. Horizontal plates 6 are fixedly installed between the upper and lower ends of the two vertical plates 5 by bolts. A hydraulic cylinder 7 with a downwardly extending piston rod is installed on the movable frame 4. The cylinder body of the hydraulic cylinder 7 is fixedly installed between the two horizontal plates 6 by bolts, and the piston rod of the hydraulic cylinder 7 passes downward through the lower horizontal plate 6.

[0029] In this embodiment, the inner sides of the two vertical rods 2 are respectively provided with vertically extending grooves 8, and the vertical plate 5 on the corresponding side is vertically slidably installed in the grooves 8, thereby improving the stability of the movable frame 4 sliding up and down.

[0030] The adjustment mechanism includes a screw 11 rotatably mounted on a horizontal plate 6 at the top of the movable frame 4 via a bearing at its lower end. The screw 11 extends vertically and is threadedly connected to a horizontal bar 3, which has a threaded hole that matches the screw 11. Rotating the screw 11 causes the movable frame 4 to slide up and down relative to the retainer 1.

[0031] The lower end of the retainer 1 is detachably mounted with a supporting plate 12 for holding the bearing 26, the supporting plate 12 is horizontally arranged, the middle part of the supporting plate 12 is provided with an open slot 13 for the motor shaft 27 to enter, the front end of the open slot 13 is open, and the open slot 13 is located directly below the piston rod of the hydraulic cylinder 7. In use, the supporting plate 12 with the open slot 13 of the corresponding size can be mounted on the lower end of the retainer 1 according to the diameter of the motor shaft 27, so as to realize the bearing dismounting work of the motor shaft with different diameters. The open slot 13 is U-shaped with the front end open, the closed end of the open slot 13 is arc-shaped and the center of the arc is located directly below the piston rod of the hydraulic cylinder 7. When the width of the open slot 13 on the selected supporting plate 12 is consistent with the diameter of the motor shaft 27, the bearing 26 is placed on the top of the supporting plate 12 and the motor shaft 27 is abutted against the inner wall of the arc-shaped end of the open slot 13, so that the motor shaft 27 and the piston rod of the hydraulic cylinder 7 are kept coaxial, the stability of the force applied by the hydraulic cylinder 7 during the bearing dismounting is improved, and the deformation of the motor shaft is avoided.

[0032] The lower end of each of the two chutes 8 is fixedly mounted with a fixed seat 14 by bolts, the bottom of each fixed seat 14 is fixedly mounted with two connecting columns 15 arranged side by side in front and back, the connecting columns 15 extend vertically, the upper end of the connecting column 15 is provided with external threads and is screwed on the fixed seat 14; the left and right ends of the supporting plate 12 are respectively provided with U-shaped grooves 16 for the two connecting columns 15 on the corresponding side to enter, the front end of the U-shaped groove 16 is open, and the width of the U-shaped groove 16 is consistent with the diameter of the connecting column 15; the lower end of the connecting column 15 is welded with a stop block 17 for holding the supporting plate 12.

[0033] When the supporting plate 12 is installed, the U-shaped grooves 16 at the left and right ends of the supporting plate 12 are respectively sleeved on the two connecting columns 15 on the corresponding side, and the bottom of the supporting plate 12 is held by the stop block 17; then the bearing 26 is placed on the top of the supporting plate 12 and the motor shaft 27 passes through the open slot 13; the screw rod 11 is rotated in a specific direction to drive the movable frame 4 and the hydraulic cylinder 7 to move downward as a whole, the top rod 21 at the lower end of the piston rod of the hydraulic cylinder 7 abuts against the upper end of the motor shaft 27, so as to press and fix the motor shaft 27 and the bearing 26, and further improve the stability during the bearing dismounting; then the hydraulic cylinder 7 is started, the piston rod of the hydraulic cylinder 7 pushes the motor shaft 27 to move downward in the axial direction, the motor shaft 27 is pushed out from the inner ring of the bearing 26, and the dismounting of the bearing is completed.

[0034] In the embodiment, the bottom of the supporting plate 12 is provided with positioning grooves 18 for clamping the stoppers 17, and a pressing plate 19 is vertically slidably installed on the two connecting columns 15 on the same fixing base 14, the pressing plate 19 is above the stoppers 17, a spring 20 for pushing the pressing plate 19 downward is sleeved on the connecting column 15 above the pressing plate 19, the supporting plate 12 is installed between the pressing plate 19 and the stoppers 17, when the supporting plate 12 is installed in place, the pushing force of the spring 20 acts on the pressing plate 19 and pushes the supporting plate 12 to move downward relative to the connecting column 15, so that the stoppers 17 are clamped into the corresponding positioning grooves 18, the effect of limiting the forward and backward movement of the supporting plate 12 is achieved, the supporting plate 12 is not easy to fall off from the connecting column 15, and the installation of the supporting plate 12 is more stable.

[0035] As shown in Figure 4 The lower end of the piston rod of the hydraulic cylinder 7 is detachably installed with a coaxially arranged ejector rod 21, the upper end of the ejector rod 21 is integrally formed with a mounting seat 22, the top of the mounting seat 22 is provided with a slot 23, the lower end of the piston rod of the hydraulic cylinder 7 is integrally formed with a plug 24 matched with the slot 23, one side of the mounting seat 22 is provided with a threaded hole transversely communicating with the slot 23, and a locking bolt 25 for abutting against the plug 24 is screwed in the threaded hole. After the locking bolt 25 is loosened, the ejector rod 21 can be detached from the lower end of the piston rod of the hydraulic cylinder 7, so that an ejector rod 21 with a proper size can be installed at the lower end of the piston rod of the hydraulic cylinder 7 according to the diameter of the motor shaft 27, and the diameter of the installed ejector rod 21 should be smaller than that of the motor shaft 27, so that the ejector rod 21 can pass through the inner ring of the bearing 26 to completely eject the motor shaft 27 downward.

[0036] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the industry that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only preferred examples of the utility model and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A small-sized motor bearing dismounting device based on hydraulic transmission, characterized in that: The utility model provides a bearing holding frame, including the holding frame (1), which is provided with movable frame (4) driven vertically moving by adjusting mechanism, hydraulic cylinder (7) of piston rod downward extension is installed on movable frame (4), the lower end of holding frame (1) is detachably installed with the supporting plate (12) for dragging bearing, the supporting plate (12) is horizontally arranged, and the opening slot (13) for the entry of motor shaft is arranged on the supporting plate (12), the horizontal one end of opening slot (13) is arranged in opening, and the opening slot (13) is located the just below of the piston rod of hydraulic cylinder (7), the lower end of the connecting column (15) of vertical extension is fixedly installed on the lower end of holding frame (1), and the U-shaped groove (16) for the entry of connecting column (15) is arranged on the supporting plate (12), the horizontal one end of U-shaped groove (16) is arranged in opening, and the lower end of connecting column (15) is fixedly installed with the stop block (17) for supporting the supporting plate (12).

2. A small-sized motor bearing dismounting device based on hydraulic transmission according to claim 1, characterized in that: The holding frame (1) includes two vertical rods (2) oppositely arranged, and the upper ends of the two vertical rods (2) are fixedly installed on the same horizontal rod (3); the inner sides of the two vertical rods (2) are respectively provided with vertically extending sliding grooves (8), and the movable frame (4) is vertically slidably installed between the two sliding grooves (8).

3. A compact motor bearing dismounting device based on hydraulic transmission according to claim 2, characterized in that: The adjusting mechanism includes a vertically extending screw rod (11) rotatably installed on the top of the movable frame (4), and the screw rod (11) is threadedly connected to the horizontal rod (3).

4. A compact motor bearing dismounting device based on hydraulic transmission according to claim 2, characterized in that: The lower ends of the two vertical rods (2) are respectively fixedly installed with fixing bases (14), the bottoms of each fixing base (14) are respectively fixedly installed with two connecting columns (15) arranged side by side in front and back, the left and right ends of the supporting plate (12) are respectively provided with the U-shaped groove (16) with a front opening, and the two connecting columns (15) on the same fixing base (14) simultaneously enter the U-shaped groove (16) on the corresponding side.

5. A compact motor bearing dismounting device based on hydraulic transmission according to claim 1, characterized in that: The bottom of the supporting plate (12) is provided with a positioning groove (18) for clamping the stop block (17).

6. A compact motor bearing dismounting device based on hydraulic transmission according to claim 5, characterized in that: The connecting column (15) above the stop block (17) is vertically slidably installed with a pressing plate (19), the connecting column (15) above the pressing plate (19) is sleeved with a spring (20) for pushing the pressing plate (19) to move downward, and the supporting plate (12) is installed between the pressing plate (19) and the stop block (17).

7. A compact motor bearing dismounting device based on hydraulic transmission according to claim 1, characterized in that: The lower end of the piston rod of the hydraulic cylinder (7) is detachably installed with a coaxially arranged jacking rod (21).

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