Device for pulling internal thread positioning pin

Abstract

The utility model provides a device for pulling an internal thread positioning pin, and relates to the technical field of installation tools. The device for pulling the internal thread positioning pin comprises a balance beam, two jacking rods and a screw rod, the two jacking rods penetrate through the balance beam and are used for abutting against a workpiece, the screw rod is used for being connected with the internal thread positioning pin in a matched mode, the two jacking rods are connected with the balance beam through threads, and the screw rod is located between the two jacking rods and penetrates through the balance beam. And a limiting part is arranged on the screw rod and is used for abutting against the surface of the side, away from the internal thread positioning pin, of the balance beam. In the process of pulling out the internal thread positioning pin, it can be guaranteed that the direction of acting force applied by the screw to the internal thread positioning pin is consistent with the axial direction of the internal thread positioning pin, and therefore the internal thread positioning pin is prevented from being knocked to deform or a positioning hole is prevented from being scratched, abraded and expanded outwards, and the repeated utilization rate of the internal thread positioning pin is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of installation tools, in particular to a device for extracting an internal thread positioning pin. Background Art

[0002] At present, there are many types of industrial equipment, such as reducers, sprocket machines, gear machines, band saw machines, etc. Although the outer protective cover or the closed shape and closed state of the shell are different, the joint surface positioning method is similar, and all use the mortise and tenon structure (i.e., locating pin). When dismantling, maintaining, and servicing equipment, there are many ways to extract the internal thread locating pin, and the common methods are reverse hammering, external force pulling, etc.

[0003] However, the common method of extracting the internal thread positioning pin has major defects, which can easily cause the end face of the internal thread positioning pin to be knocked and deformed, or the positioning hole to be scratched, worn and expanded. As a result, the internal thread positioning pin cannot be locked into the positioning hole during reinstallation, or the internal thread positioning pin is not locked tightly and shakes, causing the protective cover or the upper and lower closing covers of the shell to be misaligned, resulting in a reduced reuse rate of the internal thread positioning pin. Utility Model Content

[0004] The utility model solves the problem of how to improve the problem of reduced re-utilization rate of internal thread positioning pins.

[0005] In order to solve the above problems, the utility model provides a device for extracting an internal threaded locating pin, comprising a balance beam, two lifting rods that pass through the balance beam and are used to abut against a workpiece, and a screw rod that is used to cooperate with the internal threaded locating pin. The two lifting rods are respectively connected to the balance beam by threads, the screw rod is located between the two lifting rods and passes through the balance beam, and a limiting portion is provided on the screw rod, which is used to abut against a side surface of the balance beam away from the internal threaded locating pin.

[0006] Optionally, the device for extracting the internally threaded locating pin further comprises a first sleeve, wherein the first sleeve is mounted on a side of the balance beam away from the limiting portion, and the screw rod extends from the first sleeve to cooperate with the internally threaded locating pin.

[0007] Optionally, the device for extracting the internal thread positioning pin further includes an air bag, and the air bag is filled between the inner wall of the first sleeve and the screw rod.

[0008] Optionally, the distances from the screw rod to the two lifting rods are equal.

[0009] Optionally, the device for extracting the internal threaded locating pin further comprises two second sleeves, the two second sleeves are respectively mounted on a side of the balance beam away from the limiting portion, and the two lifting rods are respectively extended from the two second sleeves.

[0010] Optionally, the device for extracting the internal threaded locating pin also includes a locking structure, which corresponds one-to-one to the second sleeve and is installed on the side of the corresponding second sleeve away from the balance beam. The lifting rod passes through the locking structure and is connected to the locking structure by a thread.

[0011] Optionally, the limiting portion is an annular structure surrounding the screw.

[0012] Optionally, the limiting portion is connected to the screw rod through a thread.

[0013] Optionally, the first sleeve is welded to the balance beam.

[0014] Optionally, the lifting rod includes a rod body and a cubic connecting portion located at the upper end of the rod body.

[0015] Compared with the prior art, the device for extracting the internal threaded locating pin of the utility model can apply an upward lifting force to the balance beam from both sides of the screw rod through two lifting rods that penetrate the balance beam and abut against the workpiece. The lifting force can be transmitted to the screw rod by the limiting portion abutting against the surface of the side of the balance beam away from the internal threaded locating pin, and a force along the internal threaded locating pin is applied to the internal threaded locating pin through the screw rod. In this way, during the process of pulling out the internal threaded locating pin, the direction of the force applied by the screw rod to the internal threaded locating pin can be ensured to be consistent with the axial direction of the internal threaded locating pin, thereby avoiding the internal threaded locating pin from being deformed by knocking, or the locating hole from being scratched, worn and expanded outward, thereby improving the reuse rate of the internal threaded locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the device for extracting the internal thread positioning pin in the embodiment of the utility model;

[0017] Figure 2 It is a side view of the device for extracting the internal thread positioning pin in the embodiment of the utility model;

[0018] Figure 3 It is a top view of the device for extracting the internal thread positioning pin in the embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1-balance beam; 2-lifting rod; 21-cubic connecting part; 3-screw; 4-limiting part; 5-first sleeve; 6-airbag; 7-second sleeve; 8-locking structure. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the accompanying drawings, the Z axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis (that is, the direction of the arrow of the Z axis) represents the top, and the negative direction of the Z axis (that is, the direction opposite to the positive direction of the Z axis) represents the bottom; the X axis in the accompanying drawings represents the horizontal position, and the positive direction of the X axis (that is, the direction of the arrow of the X axis) represents the right side, and the negative direction of the X axis (that is, the direction opposite to the positive direction of the X axis) represents the left side; the Y axis in the accompanying drawings represents the front and back position, and the positive direction of the Y axis (that is, the direction of the arrow of the Y axis) represents the front side, and the negative direction of the Y axis (that is, the direction opposite to the positive direction of the Y axis) represents the back side. It should also be noted that the aforementioned Z axis, X axis and Y axis are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0024] Combination Figures 1 to 3 As shown, the utility model provides a device for extracting an internal threaded locating pin, comprising a balance beam 1, two lifting rods 2 that penetrate the balance beam 1 and are used to abut against a workpiece, and a screw rod 3 that is used to cooperate with the internal threaded locating pin. The two lifting rods 2 are respectively connected to the balance beam 1 through threads, the screw rod 3 is located between the two lifting rods 2 and penetrates the balance beam 1, and a limiting portion 4 is provided on the screw rod 3, which is used to abut against a side surface of the balance beam 1 away from the internal threaded locating pin.

[0025] Specifically, the balance beam 1 can be a common consumable material such as a steel plate, and the Y axis is the length direction of the balance beam 1. The two lifting rods 2 are respectively located at the front and rear ends of the balance beam 1, and the screw rod 3 is located between the two lifting rods 2. The two lifting rods 2 vertically penetrate the balance beam 1 and are respectively connected to the balance beam 1 by threads. Similarly, the screw rod 3 vertically penetrates the balance beam 1, and a limiting part 4 is installed on the screw rod 3. The limiting part 4 can be a nut. A certain distance is left between the limiting part 4 and the upper end of the balance beam 1, that is, the limiting part 4 is located above the balance beam 1. When in use, rotate the screw rod 3 and make the lower end of the screw rod 3 cooperate with the internal thread positioning pin. After cooperation, move the balance beam 1 until it abuts against the limiting part 4 on the screw rod 3, and then rotate the two lifting rods 2 respectively, and make the lower ends of the two lifting rods 2 abut against the protective cover or outer shell of the engine, reducer, etc. After abutting, continue to rotate the two lifting rods 2, and the two lifting rods 2 apply an upward lifting force to the limiting part 4 through the balance beam 1, so that the screw rod 3 moves upward to move along the axis of the internal thread positioning pin to pull out the internal thread positioning pin.

[0026] Therefore, in the present embodiment, an upward lifting force can be applied to the balance beam 1 from both sides of the screw rod 3 through two lifting rods 2 that penetrate the balance beam 1 and abut against the workpiece. The lifting force can be transmitted to the screw rod 3 through the limiting portion 4 abutting against the surface of the side of the balance beam 1 away from the internal threaded locating pin, and a force along the internal threaded locating pin is applied to the internal threaded locating pin through the screw rod 3. In this way, during the process of pulling out the internal threaded locating pin, the direction of the force applied by the screw rod 3 to the internal threaded locating pin can be ensured to be consistent with the axial direction of the internal threaded locating pin, thereby avoiding the internal threaded locating pin from being deformed by knocking, or the locating hole from being scratched, worn and expanded outward, thereby improving the reuse rate of the internal threaded locating pin.

[0027] Optionally, combined Figure 1 As shown, the internal thread positioning pin extraction device further includes a first sleeve 5, which is mounted on a side of the balance beam 1 away from the limiting portion 4, and the screw rod 3 extends from the first sleeve 5 to cooperate with the internal thread positioning pin.

[0028] Specifically, the first sleeve 5 can be welded below the balance beam 1 and sleeved on the screw rod 3 , and the lower end of the screw rod 3 can extend from the first sleeve 5 to cooperate with the internal thread positioning pin.

[0029] In this way, the screw rod 3 extends out from the first sleeve 5 installed at the bottom of the balance beam 1 to cooperate with the internal threaded locating pin. The first sleeve 5 limits the screw rod 3 to prevent the screw rod 3 from bending and deforming, thereby improving the use stability of the screw rod 3 and further preventing the internal threaded locating pin from deforming.

[0030] Optionally, combined Figure 1As shown, the device for extracting the internal thread positioning pin further includes an air bag 6 , which is filled between the inner wall of the first sleeve 5 and the screw rod 3 .

[0031] Specifically, considering the processing characteristics of the screw 3 itself, there is a gap between the threaded portion of the screw 3 and the inner wall of the first sleeve 5. In this way, by filling the airbag 6 between the inner wall of the first sleeve 5 and the screw 3, the airbag 6 can further improve the effect of the first sleeve 5 on limiting the screw 3.

[0032] Optionally, combined Figure 3 As shown, the distances between the screw rod 3 and the two lifting rods 2 are equal. In this way, during the lifting process, the torques on both sides of the screw rod 3 of the balance beam 1 are equal, so as to avoid deformation of the balance beam 1, thereby ensuring the stability of the balance beam 1.

[0033] Optionally, combined Figure 1 As shown, the internal thread positioning pin extraction device further includes two second sleeves 7 , which are respectively installed on one side of the balance beam 1 away from the limiting portion 4 , and the two lifting rods 2 are respectively extended from the two second sleeves 7 .

[0034] Specifically, the two second sleeves 7 are respectively welded under the balance beam 1 and respectively sleeved on the two jacking rods 2, and the lower ends of the two jacking rods 2 extend out of the second sleeves 7. In this way, the two second sleeves 7 prevent the two jacking rods 2 from bending and deformation, so as to improve the stability of the jacking rods 2.

[0035] Optionally, combined Figure 1 As shown, the device for extracting the internal threaded locating pin also includes a locking structure 8, which corresponds one-to-one to the second sleeve 7 and is installed on the side of the corresponding second sleeve 7 away from the balance beam 1. The lifting rod 2 passes through the locking structure 8 and is connected to the locking structure 8 by threads.

[0036] Specifically, take the locking structure 8 as a nut as an example. There are two nuts, which are respectively welded to the lower end of the second sleeve 7. The lifting rod 2 is threadedly connected to the nut, and the nut can move along the axial direction of the lifting rod 2. In this way, the lifting rod 2 passes through the locking structure 8 and is threadedly connected to the locking structure 8. The locking structure 8 can be moved so that the lower end surfaces of the locking structure 8 and the lifting rod 2 are aligned. At this time, the locking structure 8 and the lifting rod 2 are in contact with the workpiece together, and the contact area is increased. It can avoid shaking at the contact position between the lifting rod 2 and the workpiece, thereby improving the use stability of the lifting rod 2.

[0037] Optionally, combined Figures 1 to 3 As shown, the limiting portion 4 is an annular structure surrounding the screw rod 3, and the radial dimension of the annular structure is larger than the radial dimension of the screw rod 3. In this way, the limiting portion 4 increases the contact area with the balance beam 1 to improve the stability of the abutment between the limiting portion 4 and the balance beam 1.

[0038] Optionally, the limiting portion 4 is connected to the screw rod 3 by threads, so that the limiting portion 4 and the screw rod 3 can be detachably connected, and the position of the limiting portion 4 on the screw rod 3 can be adjusted, thereby improving the use flexibility of the limiting portion 4.

[0039] Optionally, combined Figure 1 As shown, the first sleeve 5 is welded to the balance beam 1. In this way, the first sleeve 5 and the balance beam 1 form an integral structure to improve the stability of the connection between the first sleeve 5 and the balance beam 1.

[0040] Optionally, combined Figure 1 As shown, the lifting rod 2 includes a rod body and a square connecting portion 21 located at the upper end of the rod body. Specifically, the rod body is a rod-shaped structure connected to the internal thread positioning pin, and the square connecting portion 21 is integrally formed at the upper end of the rod body. In this way, the square connecting portion 21 can be suitable for manual operation or for connecting to various joint conversion forms such as an electric wrench, a torque wrench or a motor, so as to improve the convenience of using the lifting rod 2.

[0041] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A device for extracting an internal thread positioning pin, characterized in that: The invention comprises a balance beam (1), two lifting rods (2) which penetrate the balance beam (1) and are used to abut against a workpiece, and a screw rod (3) which is used to cooperate with an internal thread positioning pin, wherein the two lifting rods (2) are respectively connected to the balance beam (1) by threads, the screw rod (3) is located between the two lifting rods (2) and penetrates the balance beam (1), and a limiting portion (4) is provided on the screw rod (3), and the limiting portion (4) is used to abut against a side surface of the balance beam (1) away from the internal thread positioning pin.

2. The internal thread positioning pin extraction device according to claim 1, characterized in that: It also comprises a first sleeve (5), which is mounted on a side of the balance beam (1) away from the limiting portion (4), and the screw rod (3) extends from the first sleeve (5) to cooperate with the internal thread positioning pin.

3. The device for extracting the internal thread positioning pin according to claim 2, characterized in that: It also includes an air bag (6), which is filled between the inner wall of the first sleeve (5) and the screw (3).

4. The device for extracting an internal thread positioning pin according to claim 1, characterized in that: The distances between the screw rod (3) and the two lifting rods (2) are equal.

5. The device for extracting an internal thread positioning pin according to claim 1, characterized in that: It also comprises two second sleeves (7), the two second sleeves (7) are respectively mounted on a side of the balance beam (1) away from the limiting portion (4), and the two lifting rods (2) are respectively extended from the two second sleeves (7).

6. The device for extracting the internal thread positioning pin according to claim 5, characterized in that: It also includes a locking structure (8), which corresponds one-to-one to the second sleeve (7) and is installed on the side of the corresponding second sleeve (7) away from the balance beam (1), and the lifting rod (2) passes through the locking structure (8) and is connected to the locking structure (8) by a thread.

7. The device for extracting an internal thread positioning pin according to claim 1, characterized in that: The limiting portion (4) is an annular structure surrounding the screw rod (3).

8. The device for extracting the internal thread positioning pin according to claim 7, characterized in that: The limiting portion (4) is connected to the screw rod (3) via threads.

9. The device for extracting an internal thread positioning pin according to claim 2, characterized in that: The first sleeve (5) is welded to the balance beam (1).

10. The device for extracting an internal thread positioning pin according to claim 1, characterized in that: The lifting rod (2) comprises a rod body and a square connecting portion (21) located at the upper end of the rod body.

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