Auxiliary positioning tool for dumbbell pin trepanning

Abstract

The auxiliary positioning tool for dumbbell pin tapping comprises a bottom plate and two positioning seats which are arranged in parallel, the two positioning seats are arranged at the upper end of the bottom plate in a spaced mode, V-shaped positioning grooves used for clamping dumbbell heads at the two ends of a dumbbell pin are transversely formed in the upper ends of the two positioning seats respectively, and the two positioning grooves are aligned with each other. Drilling positioning plates are arranged above the positioning grooves of the two positioning seats correspondingly, guide holes perpendicular to the bottom plate are vertically formed in the two drilling positioning plates correspondingly, and the two side walls in each positioning groove serve as two matching faces correspondingly. The two positioning grooves are clamped on the dumbbell head top plane and the dumbbell head side plane at the two ends of the dumbbell pin respectively in a matched mode, the two guide holes are perpendicular to and right opposite to pin shafts at the two ends of the dumbbell pin clamped in the two positioning grooves, and the dumbbell pin can be rapidly and accurately clamped and positioned through the positioning grooves. Therefore, inclined holes can be conveniently formed in pin shafts at the two ends of the dumbbell pin through the hole forming device, and inclined hole machining of the dumbbell pin is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of dumbbell pin hole opening, in particular to an auxiliary positioning tool for dumbbell pin hole opening. Background Art

[0002] The dumbbell pin is an important component connecting the middle troughs of the scraper. The function of the dumbbell pin is to ensure the stable connection of the middle trough of the scraper, prevent the lateral and longitudinal displacement of the middle trough, and ensure that the scraper can operate normally to transport coal.

[0003] The dumbbell pin needs to be used in combination with two clamping blocks and two spring pins. The dumbbell pin is a forging, consisting of a middle pin part, dumbbell heads at both ends and pin shafts at both ends. There are penetrating pin holes on the pin shafts at both ends for the installation of spring pins. The clamping block and dumbbell pin are fixed in the middle groove pin socket through the spring pin. When installing the spring pin, the installation space is limited due to the obstruction of the block and the middle groove pin socket, and the spring pin cannot be installed vertically. Therefore, the pin holes on the pin shafts at both ends of the existing dumbbell pin are generally opened in parallel, and the spring pin is inserted horizontally into the pin hole to fix the block. Due to the complex working conditions underground, the middle groove of the scraper will form a lateral or longitudinal displacement impact force between each other during the pushing and pulling operation, which will cause an impact on the spring pin installed on the dumbbell pin. In addition, during the operation of the scraper, the spring pin will also be rubbed by the coal. Long-term impact and friction will cause the retaining ring on the spring pin to fall off easily. When the retaining ring falls off, the horizontally installed spring pin can easily withdraw from the pin hole. Once the spring pin withdraws, the dumbbell pin will lose its lateral positioning, causing the dumbbell pin to fall off from the middle groove, thereby causing the connection between the middle grooves to fail, affecting the normal operation of the entire scraper. In order to reduce the occurrence of the spring pin withdrawing from the pin hole, the existing technology has adopted the method of opening inclined holes on the pin shafts at both ends of the dumbbell pin. The spring pin is inserted into the pin hole at an angle from top to bottom, and is not blocked by the clamping block and the middle groove pin socket. Even if the clamping ring falls off, the spring pin is not easy to withdraw from the pin hole. However, when processing the inclined hole, the conventional clamping tooling cannot quickly and accurately perform inclined clamping and positioning of the dumbbell pin, resulting in inconvenient processing of the inclined hole and low processing efficiency. Utility Model Content

[0004] In view of this, it is necessary to provide an auxiliary positioning tool for opening a dumbbell pin to solve the technical problem in the prior art that the dumbbell pin cannot be quickly and accurately tilted and clamped for positioning.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut.

[0007] Preferably, a stop block is provided on one of the mating surfaces that is engaged with the top plane of the dumbbell head, and the stop block is located at the outer edge of the mating surface to limit the dumbbell pin laterally.

[0008] Preferably, the distance between the two positioning seats is a preset distance.

[0009] Preferably, the distance between the two guide holes is a preset distance.

[0010] Preferably, a drill sleeve is nested in each of the two guide holes.

[0011] Preferably, the angle between the mating surface that is engaged with the top plane of the dumbbell head and the bottom plate is 45° to 57°.

[0012] It can be seen from the above technical solution that the auxiliary positioning tool for opening a dumbbell pin provided by the present application comprises a base plate and two positioning seats arranged in parallel, the two positioning seats are spaced apart at the upper end of the base plate, and V-shaped positioning grooves for clamping the dumbbell heads at both ends of the dumbbell pin are respectively opened horizontally on the upper ends of the two positioning seats, and the two positioning grooves are aligned with each other. Drilling positioning plates are respectively provided above the positioning grooves of the two positioning seats, and the two drilling positioning plates are respectively vertically opened with guide holes perpendicular to the base plate. The two side walls in each positioning groove serve as two The two matching surfaces of the positioning grooves are respectively clamped on the top plane of the dumbbell head and the side plane of the dumbbell head at both ends of the dumbbell pin, and the two guide holes are respectively perpendicular to and directly opposite to the center lines of the pin shafts at both ends of the dumbbell pin clamped in the two positioning grooves. The dumbbell pin can be clamped and positioned quickly and accurately through the positioning grooves, and the dumbbell pin can maintain an inclined angle in the two positioning grooves, so that the hole opening device can open inclined holes on the pin shafts at both ends of the dumbbell pin. The auxiliary positioning tooling can make the dumbbell pin processing inclined holes more convenient and accurate, and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 It is a side structural schematic diagram of the utility model.

[0015] Figure 3 This is a schematic diagram of the positioning seat structure with a stop block.

[0016] Figure 4 Schematic diagram of the assembly structure of the drilling positioning plate.

[0017] Figure 5 This is a schematic diagram of the three-dimensional structure of the dumbbell pin positioning device of the utility model.

[0018] Figure 6 This is a side structural schematic diagram of the utility model for positioning the dumbbell pin.

[0019] Figure 7 Schematic diagram of the dumbbell pin structure.

[0020] In the figure: base plate 10, pressing groove 11, positioning seat 20, positioning groove 21, matching surface 22, stop block 23, drilling positioning plate 30, guide hole 31, drill sleeve 32, dumbbell pin 40, dumbbell head 41, pin shaft 42. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Please see Figure 1 、 Figure 2 、 Figures 5 to 7The embodiment of the present invention provides an auxiliary positioning tool for opening a dumbbell pin, including a bottom plate 10 and two positioning seats 20 arranged in parallel. The two positioning seats 20 are arranged side by side on the bottom plate 10 and spaced apart from each other. V-shaped positioning grooves 21 are respectively opened horizontally on the upper ends of the two positioning seats 20 for clamping the dumbbell heads 41 at both ends of the dumbbell pin 40. The two positioning grooves 21 are aligned with each other, and the two side walls in each positioning groove 21 serve as two matching surfaces 22 respectively. The angle between the two matching surfaces 22 of each positioning groove 21 is the same as the angle between the top plane of the dumbbell head 41 and the side plane of the dumbbell head 41, and the angle α between one of the matching surfaces 22 and the bottom plate 10 is a preset angle. When positioning the dumbbell pin 40, the dumbbell pin 40 is placed parallel to the two positioning seats 20, and the dumbbell heads 41 at both ends of the dumbbell pin are respectively clamped in the positioning grooves 21 of the two positioning seats 20, and the top planes of the dumbbell heads 41 at both ends of the dumbbell pin 40 correspond to the two positioning grooves 2 The mating surfaces 22 on the same side thereof are in contact, and the side planes of the dumbbell heads 41 at both ends of the dumbbell pin 40 are in contact with the mating surfaces 22 on the other side of the two positioning grooves 21, respectively. The two inclined mating surfaces 22 are respectively correspondingly clamped on the top plane and the side plane of the dumbbell head 41 to position the dumbbell pin 40 so that the dumbbell pin 40 maintains a preset tilt angle in the two positioning grooves 21. Drilled positioning plates 30 are respectively provided above the positioning grooves 21 of the two positioning seats 20. The two drilling positioning plates 30 are each provided with a vertical guide hole 31 perpendicular to the base plate 10. The two guide holes 31 are respectively perpendicular to and directly opposite the center lines of the pin shafts 42 at both ends of the dumbbell pin 40 held in the two positioning slots 21. The drilling positioning plates 30 are fixed to the positioning seat 20 by bolts. A clamping groove 11 is provided on both sides of the base plate 10 to facilitate passing bolts through the clamping grooves 11 and mounting the base plate 10 on the workbench of the hole-making device, which is a bench drill or a drilling machine. The guide holes 31 are used to guide and position the drill bit of the hole-making device, so that the drill bit of the hole-making device can drill holes in the pin shafts 42 at both ends of the dumbbell pin 40 held in the two positioning slots 21 after passing through the guide holes 31. The predetermined angle α between the mating surface 22 of the positioning groove 21 and the top plane of the dumbbell head 41 and the base plate 10 is in the range of 45° to 57°. This causes the top plane of the dumbbell head 41 of the dumbbell pin 40 to be inclined at a 45° to 57° angle to the base plate 10, facilitating the opening device to open oblique holes in the pin shafts 42 at both ends of the dumbbell pin 40. The pin holes are opened in the pin shaft 42 at an angle from the diagonal direction of the dumbbell head 41 and are perpendicular to the centerline of the pin shaft 42.

[0023] Please see Figure 1 、 Figure 3 、 Figure 5Furthermore, in order to facilitate the lateral positioning of the dumbbell pin 40 on the two positioning seats 20, a stop block 23 is provided on the outer edge of one of the mating surfaces 22 that is clamped with the top plane of the dumbbell head 41. When positioning the dumbbell pin 40, the corresponding dumbbell head 41 can be close to the side end of the stop block 23, and the stop block 23 is used to stop and limit the dumbbell head 41, so as to quickly position the dumbbell pin 40 laterally.

[0024] The distance between the two positioning seats 20 is a preset distance, which can be set according to the spacing between the dumbbell heads 41 at both ends of the dumbbell pin 40. In addition, the distance between the guide holes 31 on the two drilling positioning plates 30 is also a preset distance, which can be set according to the spacing between the pin holes of the pin shafts 42 at both ends of the dumbbell pin 40.

[0025] Please see Figure 4 Furthermore, to prevent rapid wear and misalignment of the drilling positioning plate 30 caused by frequent use of the guide holes 31, ensure drilling quality and accuracy, and extend the service life of the entire drilling device, drill sleeves 32 are nested in the guide holes 31 of the two drilling positioning plates 30. The drill sleeves 32 have an interference fit with the guide holes 31, and the inner holes of the drill sleeves 32 are precision-turned. A non-contact relief groove is designed at the root of the outer diameter of the drill sleeves 32 to ensure a tight fit. The drill sleeves 32 are heat-treated to a hardness of HRC50-HRC55, enhancing wear resistance. The coordinated use of the drill sleeves 32 and the guide holes 31 enhances the stability of the drill bit during operation.

[0026] In a preferred embodiment, the angle between the mating surface 22 where the two positioning grooves 21 and the top plane of the dumbbell head 41 are clamped and the bottom plate 10 is 55°, so that the top plane of the dumbbell head 41 of the dumbbell pin 40 is inclined at 55° to the bottom plate 10, thereby reducing the probability of the spring pin exiting from the pin hole.

[0027] The above disclosure is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of the rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. An auxiliary positioning tool for opening a dumbbell pin hole, characterized by: The two locating seats are arranged in parallel, and the two locating seats are arranged at intervals on the upper end of the two locating seats, and V-shaped positioning grooves are respectively opened horizontally on the upper ends of the two locating seats for clamping the dumbbell heads at both ends of the dumbbell pin, and the two positioning grooves are aligned with each other, and the two side walls in each positioning groove serve as two mating surfaces, and the angle between the two mating surfaces of each positioning groove is the same as the angle between the top plane of the dumbbell head and the side plane of the dumbbell head, and the angle between one of the mating surfaces and the bottom plate is a preset angle, and a drilled positioning plate is respectively provided above the positioning grooves of the two locating seats, and the two drilled positioning plates are respectively vertically opened with guide holes perpendicular to the bottom plate, and the top plane of the dumbbell head and the side plane of the dumbbell head at both ends of the dumbbell pin can correspond to the two mating surfaces of each positioning groove, and the dumbbell pin is positioned by the two mating surfaces so that the dumbbell pin maintains a preset inclination angle in the two positioning grooves, and the two guide holes are respectively perpendicular to and opposite to the center lines of the pin shafts at both ends of the dumbbell pin clamped in the two positioning grooves.

2. The auxiliary positioning tool for opening a dumbbell pin according to claim 1, characterized in that: A stop block is provided on one of the mating surfaces that is locked with the top plane of the dumbbell head. The stop block is located at the outer edge of the mating surface to limit the lateral position of the dumbbell pin.

3. The auxiliary positioning tool for opening a dumbbell pin according to claim 1 or 2, characterized in that: The distance between the two positioning seats is a preset distance.

4. The auxiliary positioning tool for opening a dumbbell pin according to claim 3, characterized in that: The distance between the two guide holes is a preset distance.

5. The auxiliary positioning tool for opening a dumbbell pin according to claim 4, characterized in that: A drill sleeve is nested in each of the two guide holes.

6. The auxiliary positioning tool for opening a dumbbell pin according to claim 1, characterized in that: The angle between the matching surface that is locked with the top plane of the dumbbell head and the bottom plate is 45° to 57°.

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