CN104959955A - Eccentric hanger drawing machine - Google Patents

Abstract

The invention relates to an eccentric hanger drawing machine. The eccentric hanger drawing machine comprises a drawing rod with axle extending in the vertical direction, wherein an eccentric disc is arranged at the lower end of the drawing rod; the drawing rod is provided with an eccentric hanger capable of rotating corresponding to the drawing rod; the eccentric hanger is positioned above the eccentric disc, and has a hanger part for hanging the left side end surface of a workpiece; and the eccentric disc has an installation station for shifting in a projection of the eccentric hanger in the vertical direction, and a drawing station for shifting out the projection of the eccentric hanger in the vertical direction to hang the right side end surface of the workpiece. The eccentric hanger drawing machine can easily install in the drawing rod and the eccentric hanger, is convenient for installation, has no need to be smashed, prevents the damage, prolongs the service life, and also prevents the deformation or the damage of a frame type structure for installing the workpiece. Users can judge if the eccentric disc and the eccentric hanger are firmly connected with the workpiece through vertically lifting the drawing rod, so that both time and labor are saved, and the production efficiency is improved.

Description

An eccentric lug puller

technical field

The invention relates to a mechanical disassembly device, in particular to an eccentric lug puller.

Background technique

Chinese patent document CN201824115U discloses a bearing removal device, which includes a positioning sleeve, an adjusting sleeve and a pull rod shaft. The left end of the pull rod shaft is provided with an eccentric disk, and the above-mentioned positioning sleeve is rotatably assembled on the pull rod shaft on the right side of the eccentric disk. The right end of the pull rod shaft is sheathed with a pressing plate, and the pressing plate is matched with a nut that is screw-mounted on the right end of the pull rod shaft, and two bolts are also screw-mounted on the pressing plate. When in use, select the corresponding adjustment sleeve according to the specification of the bearing, and put the adjustment sleeve outside the positioning sleeve, then install the above-mentioned bearing removal device into the inner hole of the bearing, rotate the pull rod shaft, and the eccentric disc rotates relative to the positioning sleeve Thus, the inner end of the bearing is stuck, and the user converts the rotation of the bolt into the linear motion of the pressure plate by rotating the bolt, and the pressure plate drives the pull rod shaft to move to pull the bearing out of the frame.

The positioning sleeve of the above-mentioned bearing removal device needs to be fixedly connected with the bearing through the adjustment sleeve, so as to facilitate the purpose of pulling out the bearing when the eccentric disc exerts a pulling force on the inner end of the bearing. In this way, during installation, it is required to knock the adjustment sleeve into the inner hole of the bearing to complete the interference fit between the adjustment sleeve and the inner hole of the bearing, and then realize the purpose of pulling out the bearing and the pull rod shaft together. This installation method is very easy to damage the bearing. Disassembling the device reduces the service life and requires frequent replacement of parts, which is not conducive to reducing production costs.

Contents of the invention

The purpose of the present invention is to provide an eccentric lug puller to solve the technical problems of wear and short life in the prior art due to the interference fit between the adjustment sleeve and the workpiece.

In order to achieve the above object, the present invention adopts the following technical solution: an eccentric lug puller, including a pull rod whose axis extends in the up and down direction, an eccentric disk is arranged at the lower end of the pull rod, and an eccentric disk is installed on the pull rod There is an eccentric lug that can rotate relative to it, the eccentric lug is placed above the eccentric disc, and the eccentric lug has a lug portion for hanging the left end surface of the workpiece; The installation station for the projection in the up and down direction and the pulling station for hanging and pulling the right end surface of the workpiece after turning out the projection of the eccentric lug in the up and down direction.

The lug part is provided on the lower side of the eccentric lug and extends radially along the valgus rim, the distance from the inner side of the valgus rim to the axis of the pull rod is not less than the eccentric disk The distance from the outer edge of the pull rod to the axis of the pull rod.

The upper end of the drawing rod is also equipped with a drawing nut and a mounting bracket positioned below the drawing nut to prevent the drawing nut from moving downward, and the drawing nut is screw-mounted on the drawing rod. A stop-rotation limiting structure for limiting the eccentric disk to the drawing station is provided between the eccentric hanging lug and the eccentric disk.

The eccentric threaded hole is provided on the eccentric threaded hole, and the threaded section corresponding to the eccentric threaded hole is provided on the pull rod, and the eccentric threaded hole is screwed together by the screw fit between the eccentric threaded hole and the threaded section. The relative rotation between it and the pull rod is realized, and the contact end surface between the eccentric disk and the eccentric lug forms the rotation-stopping and position-limiting structure.

The installation frame includes a drawing plate, the drawing rod is inserted in the middle of the drawing plate, the drawing nut is placed on the upper side of the drawing plate, and the left and right ends of the drawing plate are provided with the left and right sides of the drawing plate. Guides the feet of the mobile mate.

The drawing plate extends along the left and right directions, and the left and right ends of the drawing plate are provided with long holes extending along the left and right directions in the length direction, and the legs cooperate with the long holes to guide and move left and right.

A thrust bearing is also installed on the drawing plate, and the drawing nut is located above the thrust bearing.

The upper end of the pull rod is inserted along its radial direction with a first opening and closing rod for assisting its rotation.

The upper side of the eccentric hanging lug is vertically inserted with a second opening and closing lever for assisting its rotation.

An eccentric lug puller of the present invention comprises a puller rod, the lower end of which is provided with an eccentric disk, and an eccentric lug that can rotate relative to it is installed on the pull rod, and the eccentric disk has an eccentric lug that turns into the eccentric lug. The installation station for the projection in the up and down direction and the pulling station for hanging the right end face of the workpiece after turning out the projection of the eccentric lug in the up and down direction, this setting makes the eccentric lug puller In the inner hole of the workpiece, only need to rotate the eccentric disc and the eccentric lug relatively, and then the pull rod and the eccentric lug can be easily installed. Compared with the prior art, the positioning sleeve needs to be knocked into the inner hole of the bearing , Easy to install, no need to knock on the eccentric lug puller, avoiding damage to the eccentric lug puller, prolonging its service life, and avoiding deformation or damage to the rack structure on which the workpiece is installed. In addition, when the workpiece needs to be hung and pulled, since the positioning sleeve and the pull rod shaft in the prior art can rotate relatively and the positioning sleeve is in interference fit with the inner hole of the bearing through the adjustment sleeve, it is easy to cause the eccentric disc and the pull rod shaft to vibrate when the pull rod shaft is vibrated. The positioning sleeve overlaps, because the environment inside the frame cannot be monitored in real time, and the user cannot determine whether the eccentric disc has been stuck on the inner end of the bearing, causing the bearing to remain in the frame after the bearing dismounting device is pulled out. An eccentric lug puller turns the eccentric disc out of the projection of the eccentric lug in the up and down direction, and the user can judge whether the eccentric disc and the eccentric lug have been firmly connected with the workpiece by pulling up and down the pull rod, which can It avoids the time-consuming and labor-intensive situation that the workpiece is still in the installation hole after the drawing is completed, saves time and effort, and improves production efficiency.

Further, the upper end of the drawing rod of the present invention is also equipped with a drawing nut and a mounting bracket located below the drawing nut for preventing the drawing nut from moving downward. The drawing nut is screw mounted on the drawing rod, eccentrically Between the lug and the eccentric disc, there is a stop-rotation limiting structure for limiting the eccentric disc to the drawing station, so that when the drawing nut is turned to pull the workpiece, there is no need to worry about the relative rotation of the eccentric lug and the eccentric disc, causing eccentricity When the distance between the disk and the eccentric mounting lug in the left and right direction becomes smaller, the phenomenon of hanging pull failure occurs.

Further, the eccentric threaded hole is provided on the eccentric lug, and the threaded section corresponding to the threaded hole is provided on the pull rod, and the relative rotation of the eccentric lug to the pull rod is realized through the screw fit between the threaded hole and the threaded section In this way, when drawing the workpiece, it is only necessary to turn the drawing nut. Compared with the bearing removal device in the prior art, the pulling force is applied to the pull rod shaft by rotating a plurality of bolts on the pressure plate, and a plurality of bolts need to be screwed during use. The operation is cumbersome, and because it is difficult to ensure that the thread feed of multiple bolts is exactly the same, the positioning sleeve and the pull rod shaft are prone to skew during the drawing process, and then come out from the inner hole of the bearing. The lug puller saves time and effort, and avoids the problem that multiple bolts cannot guarantee the same feed rate. In addition, the contact end surface between the eccentric disc and the eccentric lug forms a stop-rotation limiting structure, which makes the anti-rotation limit structure directly use the contact end surface between the eccentric disc and the eccentric lug, without adding additional parts , the structure of the eccentric lug puller is simplified, and the operation is simple.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the eccentric lug puller of the present invention in use;

Fig. 2 is a schematic diagram of the assembly structure of the eccentric hanging lug, the pull-out rod, the first split-and-close rod and the second split-and-close rod in Fig. 1;

Fig. 3 is a schematic diagram of the assembly structure of the eccentric lug and the pull rod when the eccentric disk in Fig. 1 is in the installation position;

Fig. 4 is a schematic diagram of the structure of the eccentric mounting lug in Fig. 1;

Fig. 5 is A-A sectional view of Fig. 4;

Fig. 6 is a schematic structural view of the pull rod in Fig. 1;

Figure 7 is a top view of Figure 6;

Fig. 8 is a schematic structural view of the drawing plate in Fig. 1;

Fig. 9 is a B-B sectional view of Fig. 8;

Fig. 10 is a schematic diagram of the structure of the legs in Fig. 1;

Fig. 11 is a C-C sectional view of Fig. 10 .

Detailed ways

An eccentric lug puller of the present invention, as shown in Figure 1-11, includes a puller rod 1, the puller rod is a screw rod whose axis extends in the up and down direction, and the lower end of the puller rod is provided with a Axial eccentric disc. The eccentric hanging lug 5 is installed on the above-mentioned drawing rod 1, and the eccentric hanging lug 5 and the pulling rod can be rotated relatively. ear. The eccentric disc has an installation station that turns into the projection of the eccentric lug in the up and down direction and a drawing station that is used to hang and pull the right end surface of the workpiece after turning out the projection of the eccentric lug.

The above-mentioned eccentric hanging lug is a sleeve-shaped structure extending in the up-down direction, and the above-mentioned hanging lug is arranged on the lower side of the eccentric hanging lug and extends radially along the valgus edge. The distance from the axis of the pull rod is not less than the distance from the outer edge of the eccentric disk to the axis of the pull rod. When the eccentric disk turns into the projection of the eccentric mounting lug in the up and down direction, the eccentric disk and the eccentric mounting lug 5 overlap together, and when the eccentric disk and the eccentric mounting lug 5 reach the minimum distance in the left and right direction, the eccentric disk is in the installation position; After the eccentric disc rotates out of the projection of the eccentric lug in the up and down direction, when the eccentric disc rotates to the maximum distance from the eccentric lug 5 in the left and right direction, the eccentric disc is in the drawing station. Of course, in other embodiments, the above-mentioned eccentric mounting lug can also be a plate-shaped structure extending along the left and right directions, on which an eccentric mounting hole is provided, and the end away from the eccentric mounting hole is bent downward and then faces a direction away from its axis. The above-mentioned hanging ear part is formed by extending.

The upper end of the above-mentioned drawing rod is equipped with a drawing nut 3 and a mounting bracket positioned below the drawing nut for preventing the drawing nut from moving downward, and the drawing nut 3 is screw-mounted on the drawing rod. The above-mentioned installation frame includes a drawing plate 7, the above-mentioned drawing rod is inserted in the middle part of the drawing plate, the drawing nut 3 is placed on the upper side of the drawing plate, and the left and right ends of the drawing plate are provided with the left and right sides of the drawing plate. Guides the feet of the mobile mate. In this embodiment, the shape of the drawing plate 7 is a rectangle extending in the left-right direction. Of course, in other embodiments, the shape of the drawing plate can also be a circle or the like. In order to reduce the friction between the drawing nut 3 and the drawing plate, a thrust bearing 10 is installed in the middle of the drawing plate, and the above-mentioned drawing nut 3 is located above the thrust bearing 10 . The left and right ends of the drawing plate are all provided with long holes extending in the left and right directions in the length direction, and each long hole is provided with a leg 4, which cooperates with the long hole to guide and move left and right. In this embodiment, the above-mentioned long holes The hole is a stepped long hole with a narrow top and a wide bottom. The lower end of the above-mentioned leg is a round shaft, and the upper end of the leg is a square shaft. The square shaft guides and moves left and right in the wide hole of the above-mentioned stepped long hole. After pulling out the plate, the fastening bolt 2 that is screw-mounted on its upper end is detachably installed together with the drawing plate. Of course, in other embodiments, the above-mentioned support foot 4 can also be an oblong axis or a square axis, etc., and the above-mentioned long hole can also be a through hole directly passing through the drawing plate, and the length direction of the through hole extends along the left and right directions, and the drawing The plate is arranged on the upper end surface of the support foot, and the support foot 4 is guided and moved left and right with the above-mentioned long hole through the fastening bolt screwed on the upper end after passing through the drawing plate.

A stop-rotation limiting structure for limiting the eccentric disk to the drawing station is provided between the above-mentioned eccentric lug and the eccentric disk. In this embodiment, the above-mentioned eccentric threaded hole is provided with an eccentric threaded hole, and the threaded section corresponding to the eccentric threaded hole is provided on the pull rod. Relative rotation with the pull rod. When the pull rod 1 rotates until the eccentric disk reaches the maximum distance from the eccentric mounting lug in the left and right direction, the contact end surface between the bottom of the eccentric mounting lug and the top of the eccentric disk stops and cooperates, and the eccentric disk rotates in the same direction. Terminate, prevent the eccentric disk from continuing to rotate, so that the distance between the eccentric disk and the eccentric lug in the left and right direction gradually decreases, and the above-mentioned contact end surface between the eccentric disk and the eccentric lug forms the above-mentioned anti-rotation limiting structure.

In order to rotate the eccentric disk to its installation station or drawing station conveniently, the upper end of the above-mentioned drawing rod is inserted with the first splitting rod 9 along its radial direction, and the upper side of the eccentric hanging ear is vertically inserted with a The second opening and closing rod 11, the first opening and closing rod 9 extends along the direction perpendicular to the axis of the pull rod, the second opening and closing rod is an L-shaped structure, and the long side of the L shape extends along the direction perpendicular to the upper side of the eccentric hanging lug . The setting of the first and second split-and-close rods utilizes the principle of the arm of force to facilitate the rotation of the pull rod 1 and the eccentric hanging lug, saving time and effort. Of course, in other embodiments, the first and second opening and closing levers can also be canceled, and the above-mentioned eccentric lugs are provided with locking holes for inserting hexagonal wrench. When in use, the user holds an adjustable wrench to clamp and pull On the upper end of the rod, use the other hand to turn the Allen wrench.

When the eccentric lug puller of the present invention is in use, the first splitting and closing rod 9 is inserted on the pulling rod 1, and the second splitting and closing rod 11 is inserted on the upper side of the eccentric hanging lug. Rod 1 turns the eccentric disc into the projection of the eccentric lug in the up and down direction. The eccentric disc and the eccentric lug overlap in the up and down direction. The eccentric disc is in the installation position. The user puts the pull rod 1 and the eccentric disc together In the inner hole of the workpiece 8. Turn the pull rod 1 to turn the eccentric disk out of the projection of the eccentric mounting lug in the up and down direction. The contact end face of the eccentric disc is stopped and matched, and the reversal of the eccentric disc is terminated. At this time, the eccentric disc is in the drawing position, and the eccentric disc and the eccentric lugs are both hung on the lower end face of the workpiece. pole. Then the two legs 4 are detachably installed on the drawing plate through fastening bolts, and the drawing plate is set on the upper end of the drawing rod. According to the position size of the structure where the workpiece is installed on the frame 6, move the two legs 4 left and right. To increase or reduce the distance between the two legs 4, thereby avoiding the structure at the place where the workpiece is installed, this setting reduces the limitation of the use place on the eccentric lug puller of the present invention, making it more widely used. After the fastening bolts 2 are tightened, the lower ends of the legs are pushed against the frame 6 .

Install the drawing nut 3 screw on the upper end of the drawing rod, and then turn the drawing nut 3 with an external hexagonal wrench, the drawing nut 3 drives the drawing rod to move upward, and the drawing rod exerts upward force on the workpiece through the eccentric disc and the eccentric lug. The pulling force pulls the workpiece out of the rack.

The eccentric lug puller of the present invention can be applied to the drawing and removal of spare parts such as various types of blind holes, inlaid sleeves in stepped holes, spacers, stuffing boxes, and outer rings of damaged bearings. The eccentric lug puller of the present invention can be especially applied in production fields such as petroleum refining and chemical industry to solve problems caused by fouling, coking, slight wear and deformation or interference assembly in blind holes and stepped holes in the local structures of many general-purpose equipment. The technical problem that the workpiece is difficult to take out in the equipment-related maintenance and repair has strong versatility and practicability.

The above is the preferred embodiment of the present invention. In other embodiments, the above-mentioned eccentric lug can also be set on the pull rod, and the above-mentioned anti-rotation limiting structure can also be sequentially inserted on the eccentric disk and the eccentric lug. the latch. In other embodiments, the distance from the inner surface of the valgus edge to the axis of the pull rod can be smaller than the distance from the outer edge of the eccentric disk to the axis of the pull rod. When projecting, the eccentric disk and the valgus edge are close to each other and do not completely overlap in the up and down direction. When the eccentric disk rotates out of the projection of the eccentric lug in the up and down direction, the eccentric disk and the eversion edge are far away from each other, and the distance between the eccentric disk and the eversion edge in the left and right directions is enough to hang and pull the workpiece.

In other embodiments, the above-mentioned mounting frame may also adopt other structures, such as comprising a drawer plate and bolts that are detachably mounted on the drawer plate and uniformly distributed along its axis. Those skilled in the art may also make equivalent replacements in different situations according to design common sense in this field, which are all within the protection scope of the present invention.

Claims (9)

1. An eccentric lug puller, comprising a puller rod whose axis extends in the up and down direction, the lower end of the puller rod is provided with an eccentric disc, and it is characterized in that: the puller rod is also equipped with a relatively rotatable The eccentric hanging lug, the eccentric hanging lug is placed above the eccentric disk, and the eccentric hanging lug has a hanging lug part for hanging the left end surface of the workpiece; The installation station and the drawing station used to hang and pull the right end surface of the workpiece after turning out the projection of the eccentric lug in the up and down direction. 2. An eccentric lug puller according to claim 1, characterized in that: the lug part is provided on the lower side of the eccentric lug and extends radially along the valgus edge, The distance from the inner surface of the everted edge to the axis of the pull rod is no less than the distance from the outer edge of the eccentric disk to the axis of the pull rod. 3. An eccentric lug puller according to claim 1, characterized in that: the upper end of the pull rod is also equipped with a pull nut and a handle below the pull nut for preventing the pull nut from going downward. A moving mounting frame, the drawing nut is screw-mounted on the drawing rod, and a stop-rotation limiting structure for limiting the eccentric disc to the drawing station is provided between the eccentric lug and the eccentric disc. 4. An eccentric lug puller according to claim 3, characterized in that: the eccentric lug is provided with an eccentric threaded hole, and the pull rod is provided with a corresponding setting for the eccentric threaded hole The threaded section of the eccentric lug realizes its relative rotation with the pull rod through the screw fit between the eccentric threaded hole and the threaded section, and the contact end surface between the eccentric disc and the eccentric lug forms The above-mentioned anti-rotation limiting structure. 5. An eccentric lug puller according to claim 3, characterized in that: the mounting frame includes a puller plate, the puller rod is inserted in the middle of the puller plate, and the puller nut Placed on the upper side of the drawing plate, the left and right ends of the drawing plate are provided with supporting feet that cooperate with the left and right guiding movement. 6. An eccentric lug puller according to claim 5, characterized in that: the drawing plate extends along the left and right directions, and the left and right ends of the drawing plate are provided with a length direction extending along the left and right directions the long hole, and the legs cooperate with the long hole to guide and move left and right. 7. The eccentric lug puller according to claim 5, characterized in that: a thrust bearing is installed on the pulling plate, and the pulling nut is located above the thrust bearing. 8. An eccentric lug puller according to any one of claims 1-7, characterized in that: the upper end of the pull rod is inserted along its radial direction with a first opening and closing for assisting its rotation pole. 9. An eccentric lug puller according to any one of claims 1-7, characterized in that: the upper side of the eccentric lug is vertically inserted with a second opening and closing rod for assisting its rotation .