A special tool for disassembling a belt pulley

Abstract

The utility model discloses a special tool for pulley dismounting, including horizontal guide frame, electric ejector rod, stepping controller, a plurality of sliding sleeves, a plurality of L type limit rods, upper distance measuring sensor and lower distance measuring sensor, electric ejector rod is connected in the center position department of horizontal guide frame and passes through the horizontal guide frame vertically downward, a plurality of sliding sleeves are slidably arranged in the horizontal guide frame respectively, and the bottom end of each sliding sleeve is connected with corresponding one L type limit rod, and the end of the horizontal part of a plurality of L type limit rods all is towards the axial extension line of electric ejector rod, and the bottom end of electric ejector rod is connected with upper distance measuring sensor, and the bottom end of one of L type limit rods is provided with lower distance measuring sensor, and the control end of electric ejector rod, upper distance measuring sensor and lower distance measuring sensor all are connected with stepping controller. The utility model has realized the automatic dismounting of pulley, and dismounts fast, saves time and energy.

Description

Technical Field

[0001] This utility model relates to the field of mechanical maintenance tools, specifically a special tool for disassembling pulleys. Background Technology

[0002] Vehicle maintenance often involves disassembling pulleys, but the disassembly process is often difficult because the pulleys are too tightly fitted to the axles.

[0003] Currently, when disassembling pulleys, most methods involve prying or knocking. These methods have the following disadvantages: (1) it is difficult to find a point of leverage; (2) knocking can easily damage the machine parts and shorten their service life; and (3) it is time-consuming, labor-intensive, and has low disassembly efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a special tool for disassembling pulleys, so as to realize the automatic disassembly of pulleys, which is fast, time-saving and labor-saving.

[0005] The technical solution of this utility model is as follows:

[0006] A special tool for disassembling pulleys includes a horizontal guide frame, an electric jack, a stepper controller, multiple sliding sleeves, multiple L-shaped limit rods, an upper distance sensor, and a lower distance sensor. The electric jack includes a fixed rod and a telescopic rod. The fixed rod is fixedly connected to the center of the horizontal guide frame, and the telescopic rod passes vertically downward through the horizontal guide frame. The control end of the electric jack is connected to the stepper controller. Multiple sliding sleeves are slidably mounted on the horizontal guide frame and slide horizontally along the horizontal guide frame. Each sliding sleeve has a corresponding L-shaped limit rod connected to its bottom end. The horizontal ends of the multiple L-shaped limit rods are all horizontally oriented towards the axial extension line of the electric jack. An upper distance sensor is connected to the bottom end of the electric jack. A lower distance sensor is installed on the bottom end of the vertical part of one of the multiple L-shaped limit rods. The probes of both the upper and lower distance sensors face upward toward the horizontal guide frame. Both the upper and lower distance sensors are connected to the stepper controller.

[0007] The horizontal guide frame is a horizontally arranged cross, and there are four sliding sleeves and four L-shaped limiting rods. The four sliding sleeves are respectively fitted onto the four branches of the horizontal guide frame.

[0008] Limiting blocks are connected to all four ends of the horizontal guide frame.

[0009] A suction cup is fixedly installed at the bottom end of the electric jack. The diameter of the suction cup is smaller than the diameter of the pulley axle but larger than the diameter of the electric jack telescopic rod. An upper distance sensor is installed on the suction cup, and the horizontal height of the upper distance sensor probe is the same as the horizontal height of the top surface of the suction cup.

[0010] Each of the sliding sleeves is equipped with a locking bolt, and each sliding sleeve is locked and positioned on the horizontal guide frame by the corresponding locking bolt.

[0011] The vertical part of the L-shaped limiting rod is an electric telescopic rod. The control end of the electric telescopic rod is connected to the stepper controller. The fixing rod of the electric telescopic rod is fixedly connected inside the sliding sleeve. The telescopic rod of the electric telescopic rod passes through the bottom end of the sliding sleeve. A row of vertically arranged locking teeth is provided on the telescopic rod of the electric telescopic rod. The locking teeth on multiple L-shaped limiting rods are all horizontally oriented towards the axial extension line of the electric push rod.

[0012] Advantages of this utility model:

[0013] (1) This utility model applies a jacking force to the wheel axle through an electric jacking rod. Since the wheel axle is a stationary structure, the wheel axle applies a reaction force to the electric jacking rod. The electric jacking rod then drives multiple L-shaped limit rods on the horizontal guide frame to pull the pulley off the wheel axle. Electric operation saves time and effort.

[0014] (2) This utility model is equipped with an upper distance sensor and a lower distance sensor. Before the electric push rod pushes out, the stepper controller collects the distance through the upper distance sensor and the lower distance sensor and calculates the difference to obtain the distance between the inner side of the pulley and the outer end of the wheel axle, which is the shortest distance the pulley is pulled out from the wheel axle. Then, based on this distance, the push-out length of the electric push rod is determined, and the electric push rod is controlled to perform the corresponding push-out operation, so that the pulley is pulled out from the wheel axle quickly while avoiding excessive push-out length and excessive push-out pressure, which would damage the wheel axle.

[0015] (3) A suction cup is fixedly installed on the bottom end of the electric push rod. When the pulley is quickly pulled out from the axle, the present invention will always be attached to the axle and will not fall off the axle, thus avoiding damage to the present invention and increasing its service life.

[0016] (4) The vertical part of the L-shaped limiting rod of this utility model is a telescopic rod structure. The distance between its horizontal part and the bottom of the sliding sleeve can be adjusted according to the thickness of the pulley, so that pulleys of different sizes can be locked between the horizontal part of the L-shaped limiting rod and the bottom of the sliding sleeve. The locking teeth on the L-shaped limiting rod are locked in the tooth groove of the pulley, which further improves the locking effect and makes it easier for the L-shaped limiting rod to drive the pulley to be pulled out quickly from the wheel axle. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of this utility model mounted on a pulley.

[0018] Figure 2 This is a schematic diagram of the structure of the present invention after the pulley is pushed out of the axle.

[0019] Figure 3 This is a plan view of the sliding sleeve of this utility model mounted on a horizontal guide frame.

[0020] Reference numerals: 1-Horizontal guide frame, 2-Electric push rod, 3-Stepper controller, 4-Sliding sleeve, 5-L-shaped limit rod, 6-Upper distance sensor, 7-Lower distance sensor, 8-Limit block, 9-Locking bolt, 10-Suction cup, 11-Clamping tooth, 01-Wheel axle, 02-Pulley. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0022] See Figures 1-3 A special tool for disassembling pulleys includes a horizontal guide frame 1, an electric push rod 2, a stepper controller 3, four sliding sleeves 4, four L-shaped limit rods 5, an upper distance sensor 6, and a lower distance sensor 7.

[0023] The horizontal guide frame 1 is a horizontally set cross, and four sliding sleeves 4 are respectively fitted onto the four branches of the horizontal guide frame 1. Each of the four ends of the horizontal guide frame 1 is connected to a limit block 8, which is specifically a limit bolt threaded to the end of the horizontal guide frame 1 to prevent the four sliding sleeves 4 from sliding off the horizontal guide frame 1. Each sliding sleeve 4 is provided with a locking bolt 9, and each sliding sleeve 4 is locked and positioned on the four branches of the horizontal guide frame 1 by the corresponding locking bolt 9.

[0024] The electric jack 2 includes a fixed rod and a telescopic rod. The fixed rod of the electric jack 2 is fixedly connected to the center position of the horizontal guide frame 1. The telescopic rod of the electric jack 2 passes vertically downward through the horizontal guide frame 1. A suction cup 10 is fixedly installed on the bottom end of the telescopic rod of the electric jack 2. The diameter of the suction cup 10 is smaller than the diameter of the pulley axle 01 and larger than the diameter of the telescopic rod of the electric jack 2.

[0025] Each sliding sleeve 4 is connected to a corresponding L-shaped limiting rod 5 at its bottom end. The vertical part of the L-shaped limiting rod 5 is an electric telescopic rod. The fixed rod of the electric telescopic rod is fixedly connected inside the sliding sleeve 4. The telescopic rod of the electric telescopic rod passes out from the bottom end of the sliding sleeve 4. A row of vertically arranged locking teeth 11 is provided on the telescopic rod of the electric telescopic rod. The locking teeth 11 on the multiple L-shaped limiting rods 5 are all horizontally oriented towards the axial extension line of the electric push rod 2.

[0026] The upper distance sensor 6 is mounted on the suction cup 10, and the horizontal height of the probe of the upper distance sensor 6 is the same as the horizontal height of the top surface of the suction cup 10. The lower distance sensor 7 is connected to the bottom of the vertical part of one of the L-shaped limiting rods 5, and the horizontal height of the probe of the lower distance sensor 7 is the same as the horizontal height of the top surface of the horizontal part of the L-shaped limiting rod 5.

[0027] The control end of the electric jack 2, the upper distance sensor 6, the lower distance sensor 7, and the control ends of the vertical parts of the four L-shaped limit rods 5 are all connected to the stepper controller 3.

[0028] The steps for disassembling the pulley in this utility model are as follows:

[0029] (1) Attach the suction cup 10 to the outer end of the axle 01, then loosen the locking bolts 9 on the four sliding sleeves 4, causing the four sliding sleeves 4 to move along the horizontal guide frame 1 towards the pulley 02. When the horizontal part of the L-shaped limit rod 5 is placed inside the pulley 02 and the locking teeth 11 are not in contact with the pulley 02, control the vertical parts of the four L-shaped limit rods 5 to retract synchronously through the stepper controller 3, so that the horizontal part of the four L-shaped limit rods 5 contacts the inner side of the pulley 02, so that the pulley 02 is limited between the horizontal part of the L-shaped limit rod 5 and the bottom end of the sliding sleeve 4. Then, manipulate the four sliding sleeves 4 to move towards the pulley 02 again, so that all the locking teeth 11 on the four L-shaped limit rods 5 are engaged in the tooth grooves of the pulley 02. Finally, tighten the locking bolts 9 on the four sliding sleeves 4 again (see...). Figure 1 );

[0030] (3) After positioning, the upper distance sensor 6 collects the distance L1 between the top surface of the suction cup 10 and the horizontal guide frame 1, and the lower distance sensor 7 collects the distance L2 between the top surface of the horizontal part of the L-shaped limit rod 5 (i.e., the inner side of the pulley 02) and the horizontal guide frame 1. The thickness of the suction cup 10 is L3. The stepper controller 3 performs difference calculation to obtain the distance L = L2 - L1 - L3 between the inner side of the pulley 02 and the outer end of the axle 01, which is the shortest distance that the pulley 02 is pulled out from the axle 01. Then, the motor controller determines the extension length of the electric jack 2 based on this distance. The extension length is 3-5 cm longer than the distance L, so that the pulley 02 can be completely removed from the axle 01. The electric jack 2 extends towards the axle 01 according to the extension length. Since the axle 01 is a stationary structure, the axle 01 exerts a reaction force on the electric jack 2. The electric jack 2 then drives the four L-shaped limit rods 5 on the horizontal guide frame 1. The four L-shaped limit rods 5 synchronously drive the pulley 02 to be pulled out from the axle 01 (see...). Figure 2 );

[0031] (4) After disassembly, separate the suction cup 10 from the wheel axle 01, loosen the locking bolts 9 on the four sliding sleeves 4 again, move the four sliding sleeves 4 along the horizontal guide frame 1 away from the pulley 02, and finally remove the pulley 02 from the electric push rod 2.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulley dismounting tool, characterized in that: The device includes a horizontal guide frame, an electric jack, a stepper controller, multiple sliding sleeves, multiple L-shaped limit rods, an upper distance sensor, and a lower distance sensor. The electric jack includes a fixed rod and a telescopic rod. The fixed rod is fixedly connected to the center of the horizontal guide frame, and the telescopic rod passes vertically downward through the horizontal guide frame. The control end of the electric jack is connected to the stepper controller. Multiple sliding sleeves are slidably mounted on the horizontal guide frame and slide horizontally along it. Each sliding sleeve has a corresponding L-shaped limit rod connected to its bottom end. The horizontal ends of the multiple L-shaped limit rods are all horizontally oriented towards the axial extension line of the electric jack. The bottom end of the electric jack is connected to an upper distance sensor. One of the multiple L-shaped limit rods has a lower distance sensor mounted on its vertical bottom end. The probes of both the upper and lower distance sensors face upward toward the horizontal guide frame. Both the upper and lower distance sensors are connected to the stepper controller.

2. A tool for removing a pulley according to claim 1, characterized in that: The horizontal guide frame is a horizontally arranged cross, and there are four sliding sleeves and four L-shaped limiting rods. The four sliding sleeves are respectively fitted onto the four branches of the horizontal guide frame.

3. A tool for removing a pulley according to claim 2, characterized in that: Limiting blocks are connected to all four ends of the horizontal guide frame.

4. The pulley dismounting tool according to claim 1, characterized in that: A suction cup is fixedly installed at the bottom end of the electric jack. The diameter of the suction cup is smaller than the diameter of the pulley axle but larger than the diameter of the electric jack telescopic rod. An upper distance sensor is installed on the suction cup, and the horizontal height of the upper distance sensor probe is the same as the horizontal height of the top surface of the suction cup.

5. The pulley dismounting tool according to claim 1, characterized in that: Each of the sliding sleeves is equipped with a locking bolt, and each sliding sleeve is locked and positioned on the horizontal guide frame by the corresponding locking bolt.

6. The pulley dismounting tool according to claim 1, characterized in that: The vertical part of the L-shaped limiting rod is an electric telescopic rod. The control end of the electric telescopic rod is connected to the stepper controller. The fixing rod of the electric telescopic rod is fixedly connected inside the sliding sleeve. The telescopic rod of the electric telescopic rod passes through the bottom end of the sliding sleeve. A row of vertically arranged locking teeth is provided on the telescopic rod of the electric telescopic rod. The locking teeth on multiple L-shaped limiting rods are all horizontally oriented towards the axial extension line of the electric push rod.

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