CN110774220B

CN110774220B - Universal pulling device

Info

Publication number: CN110774220B
Application number: CN201911006319.4A
Authority: CN
Inventors: 林晨阳; 张永红; 陈威; 唐飞熊; 周杰文
Original assignee: CETC 29 Research Institute
Current assignee: CETC 29 Research Institute
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2022-02-01
Anticipated expiration: 2039-10-22
Also published as: CN110774220A

Abstract

The invention relates to the field of pulling and discloses a universal pulling device which comprises a supporting frame, a handle, a sliding part and 2 springs. A handle is slidably mounted on the inner side of the supporting frame and slides along the vertical direction of the supporting frame on the inner side of the supporting frame; the sliding component comprises a hook; a sliding part is fixedly arranged between the support frame and the handle and is used for controlling the hook to move in the horizontal direction; the hook is arranged on the handle, and the movement in the vertical direction is realized through the handle; the 2 springs are fixedly arranged between the handle and the supporting frame; and a centrosymmetric scale is arranged on the supporting frame. The invention provides a universal pulling device, which adopts double pulling hooks, and is convenient and fast to replace; the distance between the double pulling hooks can be adjusted through the sliding component; the distance between the double pulling hooks can be quickly calculated by multiplying the reading number by 2 by adopting a centrosymmetric ruler; the lining made of polytetrafluoroethylene is arranged among the sliding parts, so that the sliding friction is reduced, and the service life of the pulling device is prolonged.

Description

Universal pulling device

Technical Field

The invention relates to the field of pulling tools, in particular to a universal pulling device with the distance between double pulling hooks being symmetrically adjustable and the pulling force being vertical to a case.

Background

At present, in the field of electronic equipment, modules and printed circuit boards are widely used, the distance between pull-up holes is not uniform, the loading depth in a case is different, and debugging or repairing often needs to be disassembled. The special pulling device for dismounting has several forms at present, the first type is a single pulling hook pulling device, and pulling holes are pulled back and forth when pulling, so that the device is only suitable for modules and printed circuit boards with low assembly precision. The second type is a double-pulling hook fixed-interval pulling device which is specially used for a module and a printed circuit board with a certain specific size. The third type is a pulling device with the double pulling hooks and the asymmetrical interval, because the position adjustment of the left pulling hook and the right pulling hook is relatively independent, the symmetrical center of the left pulling hook and the right pulling hook is easy to deviate from the symmetrical center of the pulling device, the deflection torque is easy to generate during pulling, and the module and the printed circuit board can be damaged during precision assembly. When the double-pulling-hook spacing asymmetric adjusting pulling device horizontally moves to pull the hook, metal contact sliding is generally adopted, the sliding effect is poor, the abrasion is serious, and the service life of the pulling device is influenced.

In addition, the conventional pulling device only depends on the stretching amount of the spring to adjust the pulling depth, and if the difference of the pulling depths of different modules and the printed circuit board is large, the pulling hook is inconvenient to replace or cannot be replaced when the difference exceeds the stretching amount of the spring.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the existing problems, the universal pulling device is provided, double pulling hooks are adopted, the replacement is convenient and fast, the total time of the double pulling hooks is about 1 minute, and the pulling hooks with different lengths are replaced, so that the requirements of various modules and printed circuit boards with great pulling depth differences are met; the distance between the double pulling hooks can be symmetrically adjusted through a gear and rack mechanism; by adopting a centrosymmetric scale, the distance between the double pulling hooks can be quickly calculated by multiplying 2 according to the reading on one side; the lining made of polytetrafluoroethylene is arranged among the sliding parts, so that the sliding friction is reduced, and the service life of the pulling device is prolonged.

The technical scheme adopted by the invention is as follows: a universal extraction apparatus, comprising: a support frame, a handle, a sliding member and an elastic member;

the supporting frame comprises a left side plate, a right side plate and a cover plate, and the cover plate is fixedly connected with the left side plate and the right side plate;

a handle is slidably mounted on the inner side of the supporting frame and is slidably connected with the left side plate and the right side plate; the handle slides along the vertical direction of the supporting frame at the inner side of the supporting frame;

a sliding part is fixedly arranged between the supporting frame and the handle, and the sliding part comprises an upper sliding part and a lower sliding part; the upper sliding part is slidably mounted on the cover plate of the supporting frame; the lower sliding part is slidably arranged on one side of the handle close to the cover plate;

the sliding component also comprises at least two pulling hooks, and the straight ends of the pulling hooks penetrate through the upper sliding component and are fixedly arranged on the lower sliding component;

the elastic component is fixedly arranged between the handle and the supporting frame cover plate and is used for controlling the handle to be close to or far away from the supporting frame cover plate;

the cover plate is provided with a centrosymmetric scale for measuring the distance between the pulling hooks; the distance between the double pulling hooks can be obtained by multiplying the reading by 2, so that the double pulling hooks are more convenient and faster.

Further, the supporting frame also comprises a guard plate; the guard plate passes through the fix with screw with left side board, right side board, the apron passes through the fix with screw with left side board, right side board, apron, guard plate, left side board and right side board reciprocal anchorage constitution rectangle carriage, such carriage reasonable in design, convenient to use.

Further, the handle comprises a grip and 2 side bushings; the 2 side bushings are respectively and fixedly installed on two sides of the handle, and the handle is respectively connected with the left side plate and the right side plate in a sliding mode through the 2 side bushings.

Furthermore, the material of 2 side bushings is polytetrafluoroethylene. The polytetrafluoroethylene has good lubricity, and can ensure that the handle can easily slide in the grooves of the left side plate and the right side plate along the vertical direction.

Further, the upper sliding part comprises 2 sliding racks, a gear and 2 upper gaskets;

the 2 sliding racks are slidably mounted in the cover plate, and the 2 sliding racks and the gear move in a meshed mode simultaneously, so that the horizontal positions of the 2 sliding racks are guaranteed to be symmetrical with respect to the gear rotating shaft all the time;

the gear is fixedly arranged in the cover plate;

the 2 upper gaskets are respectively padded on the upper side and the lower side of the sliding rack and the gear;

the 2 pieces of upper liner are made of polytetrafluoroethylene, and the gear is made of nylon. The upper liner made of polytetrafluoroethylene has good lubricity, and can ensure that the upper sliding part can easily move in the horizontal direction; the gear made of nylon is convenient for injection molding and has better lubricating property.

Further, the lower sliding part comprises 2 lower sliding blocks and 4 lower gaskets, and the 2 lower sliding blocks are slidably mounted on one side, close to the cover plate, of the handle;

every 2 lower gaskets in the 4 lower gaskets are respectively padded on the upper side and the lower side of the lower sliding block;

the 4 lower gaskets are made of polytetrafluoroethylene. The lower liner made of polytetrafluoroethylene has good lubricity, and can ensure that the lower sliding part can easily move in the horizontal direction.

Furthermore, the straight end of the pulling hook is provided with an external thread, and the pulling hook penetrates through the cover plate and the upper sliding part and then is in threaded connection with the lower sliding part. The pulling hook can move along the horizontal direction along with the upper sliding part and the lower sliding part. The pull hook can be matched with the centrosymmetric scale to adjust the distance. Meanwhile, the pulling hook in threaded connection is convenient to replace, and the requirements of various modules and printed circuit boards with great pulling depth differences can be met by replacing the pulling hooks with different lengths.

Furthermore, the sliding component also comprises a limiting support screw and a locking nut;

the limiting support screw penetrates through the cover plate and is in threaded connection with the upper sliding part; the limiting support screw moves in the horizontal direction along with the upper sliding component when being unscrewed, and the position of the upper sliding component in the horizontal direction is fixed through the friction force between the limiting support screw and the cover plate after being screwed down;

the locking nut is installed at the bottom of the straight end of the pulling hook, moves in the horizontal direction along with the pulling hook and the lower sliding part when being unscrewed, and fixes the position of the pulling hook and the position of the lower sliding part in the horizontal direction through friction force between the locking nut and the handle after being screwed down.

Further, the elastic component comprises 2 springs; the cover plate is provided with 2 groups of lugs corresponding to the handle, and the 2 groups of lugs are provided with spring holes; the 2 springs are hung in the spring holes on the 2 groups of lugs respectively. The spring is in a free state at ordinary times, the spring is stretched due to the pulling force of the handle when being pulled out, and the handle is reset by the stretching elastic force after the pulling out is finished, so that the handle is assisted to be close to or far away from the cover plate of the supporting frame.

Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: the pulling device adopts double pulling hooks, is convenient to replace, takes about 1 minute in total, and meets the requirements of various modules and printed circuit boards with great pulling depth differences by replacing the pulling hooks with different lengths; the distance between the double pulling hooks can be symmetrically adjusted through a gear and rack mechanism; by adopting a centrosymmetric scale, the distance between the double pulling hooks can be quickly calculated by multiplying the real-time reading by 2; the lining made of polytetrafluoroethylene is arranged among the sliding parts, so that the sliding friction is reduced, and the service life of the pulling device is prolonged.

Drawings

FIG. 1 is a schematic perspective view of a pulling apparatus according to the present invention;

FIG. 2 is a schematic perspective view of the hidden cover plate, the left side plate and the right side plate of FIG. 1;

FIG. 3 is a top view of the hidden cover plate and the upper liner of FIG. 1;

FIG. 4 is a perspective view of the position limiting support screw of FIG. 1;

FIG. 5 is a schematic perspective view of the separator of FIG. 1;

FIG. 6 is a perspective view of the spring of FIG. 1;

FIG. 7 is a schematic perspective view of the hook of FIG. 1;

FIG. 8 is a perspective view of the locking nut of FIG. 1;

FIG. 9 is a perspective view of the left side plate of FIG. 1;

FIG. 10 is a schematic perspective view of the cover plate of FIG. 1;

FIG. 11 is a schematic perspective view of the platen of FIG. 1;

FIG. 12 is a perspective view of the grip of FIG. 1;

FIG. 13 is a perspective view of the right side plate of FIG. 1;

FIG. 14 is a perspective view of the shield of FIG. 1;

FIG. 15 is a perspective view of the sliding rack of FIG. 2;

FIG. 16 is a perspective view of the upper liner of FIG. 2;

FIG. 17 is a schematic perspective view of the lower slider of FIG. 2;

FIG. 18 is a schematic perspective view of the lower liner of FIG. 2;

FIG. 19 is a perspective view of the side bushing of FIG. 2;

FIG. 20 is a perspective view of the gear of FIG. 3;

reference numerals: the device comprises a limiting support screw 1, a partition plate 2, a spring 3, a pulling hook 4, a locking nut 5, a left side plate 6, a cover plate 7, a pressing plate 8, a handle 9, a right side plate 10, a guard plate 11, a sliding rack 12, an upper liner 13, a lower slider 14, a lower liner 15, a side liner 16 and a gear 17.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

As shown in figure 1, the universal pulling device comprises a supporting frame, a handle, a sliding part and 2 springs.

The supporting frame comprises a left side plate, a right side plate, a protective plate and a cover plate; the left side board, the right side board the backplate, the apron passes through the rectangular frame of screw connection formation "mouth" font, the apron openly is carved with central symmetry formula scale for measure two hook spacing. By adopting the centrosymmetric ruler, the distance between the double hooks can be quickly calculated by multiplying the real-time reading by 2.

As shown in fig. 1 and 2, the support frame is further provided with a partition plate, the partition plate is clamped between the left side plate, the right side plate and the cover plate, as shown in fig. 5, two countersunk holes are processed in the middle of the partition plate, as shown in fig. 10, 2 bosses are arranged in the middle of the cover plate, and each boss is provided with a threaded hole; the partition plate is fixed with the cover plate through two screws; the partition plate is used for fixing the upper sliding part and the limiting screw, and the stability of the supporting frame is further guaranteed. As shown in fig. 2 and 3, the cover plate and the partition plate are provided with strip-shaped holes for facilitating horizontal movement of the hook, the upper sliding part is positioned in the strip-shaped hole between the cover plate and the partition plate, and the upper sliding part can move along the horizontal direction.

As shown in fig. 1 and 2, the handle comprises a grip and 2 side bushings. The 2 side surface bushings are fixedly connected to the left side and the right side of the handle through 2 screws respectively. The 2 side surface bushings are made of polytetrafluoroethylene and have good lubricating property. As shown in fig. 12, the grip is in a shape like a Chinese character 'kou', when pulling up, the four fingers except the thumb are inserted into the through cavity in the shape like the Chinese character 'kou', and the palm holds the lower end of the grip and the guard plate at the same time, so that the pulling up can be carried out by gripping the palm.

As shown in fig. 1 and 2, the handle is further provided with a pressing plate, and the pressing plate is fixed with the handle through a screw and used for fixing the lower sliding block. As shown in fig. 11, the pressing plate is provided with three countersunk holes and is fixed with the handle by three screws; meanwhile, two symmetrical strip-shaped holes are formed in the pressing plate, the handle is provided with a corresponding groove, the lower sliding block is installed in the groove between the pressing plate and the handle, and the lower sliding block can move in the groove in the horizontal direction.

As shown in fig. 1 and 2, the sliding member includes an upper sliding member, a lower sliding member, a pulling hook, a limit support screw, and a lock nut. The upper sliding part is positioned in a groove between the cover plate and the partition plate and can move along the horizontal direction, and the lower sliding part is positioned in a groove between the handle and the pressing plate and can move along the horizontal direction.

The upper sliding part comprises 2 sliding racks, a gear and 2 upper gaskets. The sliding rack is arranged in a groove between the cover plate and the partition plate; the gear is arranged in the central mounting holes of the cover plate and the partition plate. As shown in fig. 15, the left side of the sliding rack is a threaded hole; when the limiting support screw is unscrewed, the upper sliding part can move in the horizontal direction; when the limiting support screw is screwed down, the upper sliding part is fixed in the horizontal direction due to the friction force between the limiting support screw and the cover plate. The rack is arranged on the right side of the sliding rack, and as shown in fig. 3, the rack is meshed with the gear to move, so that the 2 sliding racks can symmetrically move in the horizontal direction. The 2 upper liners are made of polytetrafluoroethylene, have good lubricating property and are respectively positioned on the upper side and the lower side of the sliding rack and the gear.

The lower slide part comprises 2 lower sliders and 4 lower pads. As shown in fig. 17, a threaded hole is formed in the middle of the lower slider and is used for being in threaded connection with the pulling hook. The lower liner is made of polytetrafluoroethylene and has good lubricity, and every 2 lower liners are respectively padded on the upper side and the lower side of the lower slide block.

As shown in fig. 7, the bottom of the straight end of the pulling hook is provided with an external thread, and the external thread penetrates through the cover plate, the sliding rack, the partition plate and the pressing plate and then is screwed into the threaded hole of the lower slider so as to move along the horizontal direction along with the upper slider and the lower slider. The external thread processed at the bottom of the straight end of the pulling hook is convenient for replacing the pulling hook, and the requirements of various modules and printed circuit boards with great pulling depth differences are met by replacing the pulling hooks with different lengths.

The locking nut is installed at a thread at the bottom of the straight end of the pulling hook, moves along with the pulling hook and the lower sliding block in the horizontal direction when being unscrewed, and fixes the position of the pulling hook and the position of the lower sliding block in the horizontal direction through friction force between the locking nut and the pressing plate after being screwed.

As shown in fig. 5 and 11, the partition plate and the pressing plate are correspondingly provided with 2 sets of lugs, the lugs are provided with spring holes, and the 2 springs are respectively hung in the spring holes on the 2 sets of lugs. The spring is in a free state at ordinary times, is stretched due to the pulling force of the handle when being pulled out, and is reset by the stretching elastic force after the pulling out is finished.

Example 2

Preferably, in this embodiment, as shown in fig. 9 and 13, the left side plate and the right side plate are provided with two upper and lower grooves, the upper groove is a weight reduction groove, and the lower groove is a sliding groove of the handle. The side lining is located in the lower side groove of the left side plate and the right side plate, and helps the handle to easily slide along the vertical direction.

Example 3

Preferably, in this embodiment, as shown in fig. 4, the upper part of the limit support screw is a flat-milled cylinder for free-hand rotation, and the lower part of the limit support screw is a screw rod which penetrates through the cover plate and is screwed into the threaded hole of the sliding rack.

Example 4

Preferably, in this embodiment, the right side of the threaded hole of the sliding rack is a through hole which is slightly larger than the diameter of the pulling hook and is used for passing through the pulling hook.

Example 5

Preferably, in this embodiment, the gear is made of nylon, and can be formed by injection molding, so as to have good lubricity, as shown in fig. 20, a cylinder extends from each of the upper and lower ends of the gear, and is respectively embedded in the central mounting holes of the cover plate and the partition plate.

Example 6

Preferably, in this embodiment, as shown in fig. 16, two sides of the upper liner are provided with long circular grooves to avoid the pulling hook and the limiting support screw, the middle of the upper liner is provided with 3 circular holes, 2 larger circular holes are used for avoiding the circular boss and the screw of the cover plate, and the smaller circular holes are used for avoiding the cylinder from which the gear extends.

Example 7

Preferably, in this embodiment, the rightmost side of the sliding rack is rounded as shown in fig. 15, and the pad can slide well on the 2 pieces.

Example 8

Preferably, in this embodiment, as shown in fig. 18, the lower liner is provided with a long circular groove for avoiding the hook.

When the double-pull-hook module is pulled up, firstly, the distance between the double-pull-hooks is adjusted according to the distance between the module and the pull-up holes of the printed circuit board, and the double-pull-hooks are sleeved in the pull-up holes. Because the spacing between the limiting support screw and the pulling hook is constant and is equal to the distance between the pulling hole of the module and the printed circuit board and the side plate of the case, the limiting support screw can be propped against the step surface of the side plate of the case to play a supporting role. And one palm holds the grip and the guard plate simultaneously, and the palm grips the grip to drive the grip to vertically move upwards, so that the double-pulling hook is driven to vertically move upwards to achieve the pulling purpose. After the palm is loosened, the grip resets under the action of the tension of the spring.

When the distance between the two pulling hooks needs to be adjusted, the limiting support screws and the locking nuts are respectively unscrewed, and simultaneously 2 limiting support screws and 2 pulling hooks are moved to be symmetrically movable. After the movable support is moved in place, the limiting support screw and the locking nut are screwed respectively, and then the movable support can be fixed.

Because different modules and printed circuit boards have pull-out depth changes exceeding the spring tension or the pull hook is damaged, when the pull hook needs to be replaced, the locking nut is unscrewed, and the pull hook can be screwed out by rotating anticlockwise; and after the replaced pulling hook penetrates through the cover plate, the sliding rack, the partition plate and the pressing plate, the pulling hook is clockwise screwed into the threaded hole of the lower sliding block, and the locking nut is screwed tightly, so that the pulling hook can be fixed. After the skilled operation, the time for changing the double hook is about 1 minute in total.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.

Claims

1. A universal extraction apparatus, comprising: a support frame, a handle, a sliding member and an elastic member;

the supporting frame comprises a left side plate, a right side plate and a cover plate, and the cover plate is fixedly connected with the left side plate and the right side plate; a handle is slidably mounted on the inner side of the supporting frame and is slidably connected with the left side plate and the right side plate; the handle slides along the vertical direction of the supporting frame at the inner side of the supporting frame; a sliding part is fixedly arranged between the supporting frame and the handle, and the sliding part comprises an upper sliding part and a lower sliding part; the upper sliding part is slidably mounted on the cover plate of the supporting frame; the lower sliding part is slidably arranged on one side of the handle close to the cover plate; the sliding component also comprises at least two pulling hooks, and the straight ends of the pulling hooks penetrate through the upper sliding component and are fixedly arranged on the lower sliding component; the elastic component is fixedly arranged between the handle and the supporting frame cover plate and is used for controlling the handle to be close to or far away from the supporting frame cover plate; the cover plate is provided with a centrosymmetric scale for measuring the distance between the pulling hooks;

the handle comprises a grip and 2 side bushings; the 2 side bushings are respectively and fixedly arranged on two sides of the handle, and the handle is respectively connected with the left side plate and the right side plate in a sliding manner through the 2 side bushings;

the lower sliding part comprises 2 lower sliding blocks and 4 lower gaskets, and the 2 lower sliding blocks are slidably arranged on one side of the handle close to the cover plate; the middle of the 2 lower sliding blocks is provided with a threaded hole for being in threaded connection with a pulling hook, and every 2 lower gaskets in the 4 lower gaskets are respectively padded on the upper side and the lower side of the lower sliding block; the 4 pieces of lower gaskets are made of polytetrafluoroethylene;

the handle is also provided with a pressing plate, the pressing plate is also provided with two symmetrical strip-shaped holes, the handle is provided with a corresponding groove, the 2 lower sliders are arranged in the groove between the pressing plate and the handle, and the 2 lower sliders can move in the groove along the horizontal direction;

the upper sliding part comprises 2 sliding racks, a gear and 2 upper gaskets;

the gear is fixedly arranged in the cover plate;

the 2 pieces of upper gaskets are made of polytetrafluoroethylene, and the gear is made of nylon;

the sliding component also comprises a limiting support screw and a locking nut;

the locking nut is installed at the bottom of the straight end of the pulling hook, moves along with the pulling hook and the lower sliding part in the horizontal direction when being unscrewed, and fixes the positions of the pulling hook and the lower sliding part in the horizontal direction through friction force between the locking nut and the handle after being screwed down;

the elastic component comprises 2 springs; the cover plate is provided with 2 groups of lugs corresponding to the handle, and the 2 groups of lugs are provided with spring holes; the 2 springs are hung in the spring holes on the 2 groups of lugs respectively.

2. The universal extraction apparatus of claim 1, wherein said support frame further comprises a guard plate;

the protective plate is fixed with the left side plate and the right side plate through screws, the cover plate is fixed with the left side plate and the right side plate through screws, and the cover plate, the protective plate, the left side plate and the right side plate are mutually fixed to form a rectangular supporting frame.

3. The universal extraction apparatus of claim 1, wherein said 2-piece side liner is polytetrafluoroethylene.

4. The universal extraction device as claimed in claim 1, wherein the straight end of the extraction hook is externally threaded, and the extraction hook is threaded onto the lower slider member after passing through the cover plate and the upper slider member.