TWI656284B - Positioning locking device - Google Patents

Abstract

A positioning locking device comprises a casing body, a ball box, a ball, and a bolt locking pressing joint; the casing body has a blind screw hole, and a plurality of through holes are formed in the wall surface; the ball groove box comprises a ball groove seat and a phase cover The ball groove cover has a first ball blind groove with one end being a closed end and the other end being an open end; the ball groove cover is provided with a second ball blind groove, one end of which is a closed end and the other end of which is an open end, first, first The two ball blind grooves form an accommodating space corresponding to the interlaced space, and the rotating interface is arranged on the top surface of the ball groove cover, and the ball groove cover and the ball groove are rotated relative to each other, so that the respective ball portions are protruded or the whole is collected in the ball box. The bolt portion of the bolt lock pressing screw is screwed to the blind screw hole, and the bolt lock pressing pressure block has a central passage to provide the turning tool to extend into and connect the rotating interface.

Description

Positioning locking device

The invention relates to a positioning locking device, in particular to a positioning locking device for positioning locking or releasing two objects.

The welding method of the workpiece is a manufacturing process and technology for joining metal or other thermoplastic materials such as plastics by heating, high temperature or high pressure, and is widely used in the field of machining.

At present, when welding a workpiece, the workpiece to be welded is usually placed on the welding platform or manually pressed and fixed. During the welding process, the workpiece will move, which may cause welding defects and dimensional errors, thereby affecting product quality. The welding fixture is fixed.

Existing manufacturers have begun to replace traditional special welding fixtures with reconfigurable fixtures, which can achieve repeated effects and recombination of various different workpieces. The fixture fixing position in the reorganization process will affect the reorganization time of the fixture. The convenience of the operation and the precision of the fixture after recombination, while the conventional screw with the nut locking method has poor positioning accuracy and disassembly, and therefore, the manufacturer has a quick locking mechanism, such as the CN202659669U patent document, which will be fixed. The locking mechanism body is pressed against the base. The locking mechanism body comprises a guide post, a positioning shaft and a locking ring. The locking ring is divided into an upper part and a lower part. The lower part of the locking ring is mounted on the base, and the diameter of the inner hole is The middle part begins to increase downwards in a tapered shape, and the upper part of the locking ring is pressed against the base by the fixing object, the positioning shaft is stepped, the upper step shaft of the positioning shaft is pressed against the locking ring, and the positioning shaft is internally provided with a stepped hole, the positioning shaft The lower stepped hole is provided with a steel ball, and the lower part of the positioning shaft is provided with a placement hole, and the steel ball is placed at both ends of the placement hole, and the guide column is divided into a guide rod portion, a locking portion and a stopper portion, and the upper end of the guide rod portion is set Spring, the lower end portion of the rod guide is positioned lower pressing stepped bore axis of the ball, the ball pressing the inner tapered surface of the ball pressing the locking hole disposed lower ring. The disadvantage of this patent is that it is a two-piece structure, which needs to be installed separately from the upper part and the lower part, and the outer shape of the lower locking ring cannot be combined with the through hole of the general welding work platform, and a special special platform must be used.

Or the manufacturer has improved the connector. For example, the CN104047938A patent document discloses a novel positioning connector including a locking screw, a precision pin, and a steel ball, wherein the precision pin is used as a main member, and the outer surface thereof is made into a high-precision cylindrical surface. The inner hole car has a threaded blind hole, and a plurality of inverted cone circular holes are formed at the end portion thereof, and the steel ball is correspondingly assembled in the round hole of the inverted cone, and the outer edge of the steel ball is higher than the outer surface of the precision pin shaft; The tightening screw is made into a stepped shaft, and the front end portion is formed with a hexagonal wrench hole, the middle portion is threaded, the rear end portion is tapered, and the locking screw and the precision pin are simultaneously loaded into the holes of different parts. And a threaded connection between the locking screw and the precision pin. The patent also has the following: the steel ball has no rebound design, and the disassembly is easy to cause the steel ball to rebound, which makes the removal difficult, and even causes wear and tear, and the locking stroke is limited.

In addition, as shown in Fig. 1, U.S. Patent No. 7,033,674 B2, which discloses a bolt clamping system 1 for detachably clamping two objects (W1, W2) having at least one through hole therethrough. They are connected to each other quickly and reliably. It comprises a bolt housing 11 having an opening and a clamping device 12 disposed inside the bolt housing 11 and having an external thread. The bolt housing 11 is disposed through the two stacked through holes, and the clamping device 12 is Supported in the opening of the bolt housing 11, the external thread meshes with the internal thread of the bolt housing 11, and forces the tightening device 13 to be described later to run out of the bolt housing 11 during the clamping, so that an external portion of the tightening device 13 The opening 111 protrudes. The clamping device 12 is at least one of the tightening devices 13 supported in the bolt housing 11 in a rotationally fixed manner, and the outer portion of the tightening device 13 has a supporting surface which is a transverse region of a truncated pyramid A segment or an annular support surface.

The technical content of the above-mentioned prior art patent document has the advantages of positioning and locking once completed, but also has the locking stroke limitation and the steel ball has no rebound design, and the disassembly is easy to cause the steel ball to rebound smoothly, which makes the removal difficult. , may cause the shortcomings of steel ball and table wear.

The object of the present invention is to use a threaded combined housing body and a bolt-locking pressure-bonding block, in combination with a vertically and vertically detachably overlapping ball groove box, and the ball groove cover of the upper layer is driven by the forward and reverse steering directions to make the groove of the ball groove The spatial position produces a change in the movement between the center of the ball cage and the outer edge to cause the ball to protrude or to be included in the ball box, and has a quick-adjustable locking stroke and a protruding steel ball retractable design.

In order to achieve the above object, the technical device provided by the present invention is a positioning and locking device, comprising: a casing body having a long tubular shape, having a head end portion and a barrel portion, wherein the end portion of the barrel body is concavely formed a blind screw hole, the sidewall of the head end is provided with a plurality of through holes communicating with the blind screw hole; a ball slot box comprising a ball slot fixed to the bottom of the blind screw hole and a cover The ball groove cover of the ball bearing seat, the ball groove seat facing the first surface of the ball groove cover is recessed by a plurality of first and third ends extending radially inward from the outer edge of the circumferential surface thereof a ball blind groove, and the adjacent two first ball blind grooves have the same angle, and the first ball blind grooves form a first half opening at one end of the outer edge of the circumferential surface, the ball groove cover faces the ball socket One of the second surfaces is recessed by a plurality of second ball blind grooves extending radially inward from a peripheral edge of the circumferential surface thereof, and adjacent two second ball blind grooves have the same angle, and the second The ball blind groove forms a second half opening at one end of the outer edge of the second surface, and the first angle is different from In the second angle, each of the first ball blind grooves corresponds to one of the second ball blind grooves and meets at an angle to each other, and further encloses an accommodating space at the intersection thereof, and the ball groove cover faces the ball a plane of the slot is disposed to drive the ball slot cover to rotate relative to the second surface of the ball socket; the plurality of balls are inserted into the ball groove one by one a ball-locking space; a bolt-locking pressure-bonding block, the rod portion of which is screwed into the blind screw hole of the casing body, the head diameter of which is larger than the diameter of the casing body, and the bolt-locking pressure-bonding block has a through-hole The center channel.

In an embodiment, the extension line of the central axis of each of the first ball blind grooves does not pass through the center point of the first surface, and the extension line of the central axis of each of the second ball blind grooves passes through the first a center point of the two surfaces; or an extension line of a central axis of each of the first ball blind grooves passes through a center point of the first surface, and an extension line of a central axis of each of the second ball blind grooves does not pass The center point of the second surface.

In one embodiment, the method further includes: a ball adjusting member penetrating through the central passage and connecting the rotating interface of the ball groove cover with a joint interface, and interlocking the joint interface by rotating the ball adjusting member And the ball groove cover rotates the ball groove cover clockwise or counterclockwise with respect to the ball groove.

In an embodiment, the diameters of the balls are smaller than the groove width of the first ball blind groove and the second ball blind groove.

In one embodiment, the first ball blind slots and the second ball blind slots are each three lanes.

In an embodiment, the rotating interface of the first ball blind groove is a groove having a non-circular cross section.

In one embodiment, the rotating interface of the first ball blind groove is a groove having a non-circular cross section, and the cross-sectional shape of the joint interface of the adjusting rod corresponds to the cross-sectional shape of the groove of the non-circular cross section. .

In one embodiment, the bottom of the blind screw hole has at least one recess, and the bottom surface of the ball socket has a protrusion embedded in the pit corresponding to the position of the pit.

In one embodiment, the head of the bolt lock nip is a hex head bolt head shape.

In an embodiment, the first half opening of each of the first bead rolling blind grooves and/or the second half opening of each of the second bead rolling blind grooves further comprise a retracting structure, such that The half opening and the second half opening have a diameter slightly smaller than the diameter of the ball to prevent the ball from escaping from the ball box.

The characteristics of this creation are: when applied to the frame welding platform, the traditional screw and nut locking and positioning pin positioning mode, because the matching floor and the fixture of the welding platform can no longer be used for new models, and the locking position It must be divided into two operations. In contrast, the application of this creation to the frame platform welding operation is faster, and the fixture system can be reused. The positioning locking device of the present invention can complete the positioning and locking operation from the single side of the welding platform, and the installation and disassembly are faster, the working time is shortened, and the large platform is applied compared with the other two-piece double-side locking method. In the mechanism for driving the ball to protrude or not into the ball box, the ball groove cover and the ball seat which are separated above and below the ball box are designed to be displaced from each other, and can be combined with the ball box. Separation and replacement to replace the lossy ball ball design, the two complement each other, saving components. The locking stroke of this creation can be adjusted to adapt to more kinds of platforms, corresponding to more types of welding fixture workpieces and application types. The ball ball of this creation is detachable and replaceable (the ball ball is easy to wear), and it can be used continuously after only replacing the ball, which greatly reduces the purchase cost.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings in which the drawings The components shown are not drawn in the number, shape, size ratio, etc. at the time of implementation, and the actual size of the implementation is a selective design, and the component layout form may be more complicated.

First, please refer to FIG. 2 to FIG. 7. The positioning locking device 2 of the embodiment is suitable for positioning fixing or releasing at least two objects (W1, W2), and the positioning locking device 2 comprises: a casing body 21, a ball box 22, balls 23 and a bolt lock press Block 24.

The outer casing body 21 is a hollow long cylinder shape, and includes a head end portion 211 and a barrel portion 212. The head end portion 211 is a closed end, and a center of the end surface of the barrel portion 212 has a recess formed in the outer casing. The body 21 has a blind screw hole 2121. The sidewall of the head end portion 211 defines a plurality of through holes 2111 communicating with the blind screw hole 2121. Preferably, the through holes 2111 are preferably arranged in two adjacent directions. The holes are all at the same angle and are evenly distributed over the entire circumference of the radial section of the casing body 21. For example, in this embodiment, three through holes 2111 are formed, and the two are respectively disposed at an angle of 120; the ball box 22 is The ball bearing seat 221 fixed to the bottom of the blind screw hole 2121 and the ball bearing cover 222 (also disposed in the blind screw hole 2121) are attached to the ball bearing seat 221 .

The first surface 2210 of the ball bearing cover 221 facing the ball bearing cover 222 is also concavely disposed at a same angle with the center point of the first surface 2210 as a center and uniformly distributed on the first surface 2210. The first ball blind groove 2211, in other words, the first surface 2210 is recessed with a plurality of first ball blind grooves 2211 extending from a radially inner side of the circumferential surface thereof at a first angle 22101 (better, The first two ball blind grooves 2211 have the same angle A, as shown in FIG. 7 , and the first ball blind groove 2211 forms a first half opening 2214 and one end near the center at one end of the outer edge of the circumferential surface. Specifically, the first angle 22101 is an angle between the central axis 2213 of the first ball blind groove and the center of the first surface 2210 and the first half opening 2214; the ball groove cover The second surface 2220 of one of the ball bearing seats 221 is recessed with a plurality of second ball blind grooves 2221 extending radially inward from the outer edge of the circumferential surface thereof at a second angle 22201 (better, adjacent two The second ball blind grooves 2221 are all at the same angle B, as shown in FIG. 8 , and the second ball blind grooves 2221 are One end of the outer edge of the two surfaces 2220 defines a second half opening 2224. The first angle 22101 is different from the second angle 22201 (in the present embodiment, such as FIG. 7, FIG. 8 and FIG. 9, the first angle 22101 is one. The acute angle and the second angle 22201 are 0 degrees. The ball bearing seat 221 of the configuration is fixed to the blind screw hole 2121 and does not rotate. The positions of the first half openings 2214 are facing and corresponding to each other. The hole 2111), each of the first ball blind grooves 2211 corresponds to one of the second ball blind grooves 2221 and meets at an angle to each other, and furtherly encloses an accommodation space 223 in which the balls 23 can be placed at the intersection thereof. The ball slot cover 222 is provided with a rotating interface 2222 (such as a groove shape) facing the plane of the ball bearing block 221 to drive the ball groove cover 222 on the second surface 2220 relative to the ball bearing seat 221 The first surface 2210 rotates.

The plurality of balls 23 are a plurality of balls, and the number of the first and second ball grooves is respectively set in the accommodating spaces, and the diameters of the balls 23 are larger than the first and second ball grooves. Radial groove depth.

The rod portion 240 of the bolt lock press block 24 has an external thread and is screwed into the blind screw hole 2121 of the shell body 21, and the head diameter 241 of the bolt lock press fitting block 24 is larger than the diameter of the shell body 21, The bolt lock ram 24 has a central passage 243 extending therethrough along its central axis 242.

As described above, when the ball groove cover 222 is to be rotated, a rotary tool T (such as a screwdriver, please refer to FIG. 2 and referring to FIGS. 9 to 11) can be used, and the rotary interface 2222 is embedded at the tip end thereof (for example). The ball groove cover 222 rotates the ball groove cover 222 and the ball groove seat 221 to rotate with each other. Specifically, the ball groove seat 221 is embedded in the bottom of the blind screw hole 2121. While being fixed, only the ball slot cover 222 is rotated to move or immerse the balls 23 in the dynamic accommodation space 223 between the first ball blind slot 2211 and the second ball blind slot 2221. In the ball cage 22 (of course, when the balls 23 protrude from the ball cage 22, the balls 23 must also protrude from the through holes 2111 of the casing body 21).

The above-mentioned turning tool T can also be a ball adjusting member 25, the ball adjusting member 25 has an adjusting rod 251, and the adjusting rod 251 has a joint interface 2511 at the end thereof, and the adjusting rod 251 is pressed by the bolt. The central passage 243 of the block 24 penetrates and connects the rotating interface 2222 of the ball groove cover 222 with the joint interface 2511, and the ball groove cover 222 is interlocked with respect to the ball groove by rotating the ball adjusting member 25. Seat 221 rotates clockwise or counterclockwise.

Please refer to Figures 5-11 again. With the above structure, the two object members (W1, W2) are first stacked, and the hole positions (W11, W21) on the object members (W1, W2) are respectively aligned, and the casing body 21 of the positioning locking device 2 is aligned. The head end portion 211 is inserted into the hole position (W11, W21) such that the position of the through hole 2111 is lower than the bottom surface of the bottom object W2, and the relative position of the bolt lock hydrating block 24 and the through hole 2111 is spirally adjusted. The bottom surface of the head of the bolt lock pressing block 24 is close to the top surface of the object W1 at the top to adjust the locking stroke, and then the dialing tool or the ball adjusting member 25 is inserted into the center passage 243, and The ball joint cover 2222 is connected to the swivel interface 2222 of the ball slot cover 222. The ball adjuster 25 is interconnected with the joint interface 2511, so that the ball adjuster 25 can interlock the ball slot cover 222 via the joint interface 2511. In this embodiment, the ball slot cover 222 is rotated clockwise (see the top view of FIGS. 9-11), and the respective balls 23 are partially protruded from the ball box 22, and then the bolt lock is adjusted again. Block 24, the bolt lock hydrating block 24 is placed on the underside of the object W2 by the ball 23 Under mention, shortening the bolt lock pay nip height of the block 24 to the top surface of the article W1 of the pressing, forming clamping action. When the clamping action of the object (W1, W2) is to be released, the ball adjusting member 25 only needs to be rotated in the opposite direction, so that the respective balls 23 are received in the ball box 22, and the positioning locking device 2 can be released. Locked state for fast unlocking. Specifically, as shown in FIGS. 9 to 11. The ball 23 is disposed in the accommodating space 223 formed by the first ball blind groove 2211 and the second ball blind groove 2221. When the ball groove cover 222 rotates clockwise, the first ball blind groove 2211 The accommodating space 223 of the second ball blind groove 2221 is moved to the outer edge of the ball box 22 along the second ball blind groove 2221 from the intermediate position of the ball box 22, so that the first ball is blind during the process. The surface of the groove 2211 generates a thrust F that drives the ball 23 to move clockwise, moves the ball 23 from the intermediate position of the ball cage 22 to the outer edge of the ball cage 22, and causes the ball 23 to protrude from the ball pocket 22 The outer circumference is such that the convex ball 23 and the head diameter 241 of the bolt-locking hydration block 24 of the swingable stroke form a clip structure of the two objects (W1, W2). Similarly, when the ball groove cover 222 is rotated counterclockwise, the accommodating space 223 of the first ball blind groove 2211 and the second ball blind groove 2221 is located along the outer edge of the ball box 22 along the second ball blind groove. 2221 is moved to the inner center of the ball cage 22 to release the clip state of the two objects (W1, W2), so that the casing body 21 can be removed from the hole position (W11, W21).

In addition, it is worth mentioning that, in the foregoing embodiment, the diameters of the balls 23 are slightly smaller than the groove widths of the second ball blind grooves 2221 and the first ball blind grooves 2211, so that the balls 23 can smoothly The second ball blind grooves 2221 roll in the accommodating space 223 formed by the first ball blind grooves 2211.

In this embodiment (as shown in FIG. 7 and FIG. 8), the first angle 22101 is an acute angle (so that the first ball blind groove 2211 is provided to the oblique thrust of the ball 23 to move easily), and the second angle is 0 degree, that is, The extension line of the central axis 2213 of each of the first ball blind grooves 2211 does not pass through the center point of the first surface 2210, and the extension line of the central axis 2223 of each of the second ball blind grooves 2221 passes through the first The center point of the two surfaces 2220, this configuration can rotate the ball groove cover 222 clockwise to move the ball 23 to the accommodation space 223 between the first half opening 2214 and the second half opening 2224, and reverse (counterclockwise) rotation of the ball groove cover 222 moves the ball 23 to the accommodating space 223 near the closed end of the first ball blind groove 2211 and the closed end of the second ball blind groove 2221.

However, in an embodiment, the first angle 22101 can be reversed with the second angle, for example, the extension line of the central axis 2213 of each of the first ball blind grooves 2211 passes through the center point of the first surface 2210, and The extension line of the central axis 2223 of each of the second ball blind grooves 2221 does not pass through the center point of the second surface 2220. This configuration can rotate the ball groove cover 222 counterclockwise to move the balls 23 to the first half opening 2214 and the second. The accommodating space 223 between the half openings 2224 and the reverse (clockwise) rotating ball groove cover 222 move the balls 23 to the accommodating space 223 near the closed end of the first ball blind groove 2211 and the closed end of the second ball blind groove 2221.

The bolt lock pressing and pressing block 24 of the present invention and the outer casing body 21 are arranged in a screw-like manner. When the distance to be adjusted exceeds the adjustable length of the thread length, the modular design of the present invention can be It is convenient to replace the bolt lock press fittings 24 of different screw lengths to suit different lock lengths.

In an embodiment, the diameter of the balls 23 is smaller than the groove width C of the first ball blind groove 2211 or smaller than the groove width D of the second ball blind groove 2221 (see FIGS. 7 and 8).

In one embodiment, the first ball blind slots 2211 and the second ball blind slots 2221 are each three lanes.

In an embodiment, the rotating interface of the first ball blind groove 2211 is a groove having a non-circular cross section, such as a square, a triangle, or the like.

In an embodiment, the rotating interface 2222 of the second ball blind groove 2221 is a groove having a non-circular cross section, and the cross-sectional shape of the joint interface 2511 of the adjusting rod 251 corresponds to the concave of the non-circular cross section. The cross-section of the groove.

In an embodiment, as shown in FIG. 4, the bottom of the blind screw hole 2121 has at least one recess 21211. The bottom surface of the ball socket 221 is provided with a protrusion embedded in the recess 21211 corresponding to the position of the recess 21211. Block 2212 is adapted to fit the ball socket 221 into the blind screw hole 2121.

In one embodiment, the head of the bolt lock press block 24 is shaped as an outer hexagon head bolt head to facilitate the tool or hand to rotate the bolt lock press block 24.

In an embodiment, as shown in FIGS. 7 and 8, each of the first bead blind grooves 2211 and/or each of the second ball blind grooves 2221 of the ball box 22 further includes a retracting structure 2231 ( For example, the retracting structure 2231 may be an integral protrusion of the inner wall of the first half opening 2214 of the first bead rolling blind groove 2211 or an integral part of the inner wall of the second half opening 2224 of the second ball blind groove 221. The formed projections are formed such that the diameter of the second half opening 2224 and the first half opening 2214 is slightly smaller than the diameter of the ball 23 to prevent the ball 23 from escaping the ball cage 22.

The above-described embodiments are merely illustrative of the principles, features, and effects of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art can recite the above without departing from the spirit and scope of the present invention. The embodiment is modified and changed. Any equivalent changes and modifications made by the disclosure of the present invention should still be covered by the following claims. Therefore, the scope of protection of the present invention should be as set forth in the scope of the patent application.

1‧‧‧Bolt clamping system

11‧‧‧Bolt housing

111‧‧‧ openings

12‧‧‧Clamping device

13‧‧‧ Tightening device

2‧‧‧ Positioning locking device

21‧‧‧Shell body

211‧‧‧ head end

2111‧‧‧through hole

212‧‧‧Body

2121‧‧‧Blind screw holes

21211‧‧‧ pit

22‧‧‧Rolling box

221‧‧‧Roller seat

2210‧‧‧ first surface

22101‧‧‧ first angle

22102‧‧‧ center point

2211‧‧‧First ball blind slot

2212‧‧‧Bumps

2213‧‧‧ center axis

2214‧‧‧first half opening

222‧‧‧Rolling groove cover

2220‧‧‧ second surface

22201‧‧‧second angle

22202‧‧‧ center point

2221‧‧‧Second ball blind slot

2222‧‧‧Rotary interface

2223‧‧‧Center axis

2224‧‧‧second half opening

223‧‧‧ accommodating space

2231‧‧‧ contraction structure

23‧‧‧ balls

24‧‧‧Bolt lock and pressure block

240‧‧‧ pole

241‧‧‧ head diameter

242‧‧‧ center axis

243‧‧‧Central passage

25‧‧‧Ball adjustment parts

251‧‧‧ adjustment rod

2511‧‧‧ connector interface

A, B‧‧‧ angle

C, D‧‧‧ slot width

F‧‧‧Thrust

T‧‧‧ turning tool

W1, W2‧‧‧ objects

W11, W21‧‧‧ hole

1 is a prior art bolt clamping system; [FIG. 2] is a perspective system view of a positioning and locking device for decomposing a ball cartridge according to an embodiment of the present invention; [FIG. 3] Another embodiment of the present invention FIG. 4 is a perspective view of a positioning and locking device of the ball and groove box combination of the embodiment of FIG. 3; FIG. 5 is a positioning diagram of an embodiment of the present invention; 3D sectional view of the locking device; [Fig. 6] is a perspective sectional view of the positioning locking device for adjusting the bolt locking and the ball distance of Fig. 5; [Fig. 7] Positioning according to an embodiment of the present invention FIG. 8 is a top view of a ball groove cover of a positioning and locking device according to an embodiment of the present invention; FIG. 9 is a view of a positioning and locking device according to an embodiment of the present invention; [Fig. 10] is a top view of a ball cage of a positioning and locking device for pushing a ball state according to an embodiment of the present invention; and [Fig. 11] an embodiment of the present invention For example, the ball cage of the positioning locking device pushes up the top view of the ball state.

Claims (13)

A positioning locking device comprises: a housing body having a head end portion and a barrel portion, the head end portion being a blocking end, the end surface of the barrel portion forming a blind screw hole, the head end side wall being opened a plurality of radial through-holes that are equiangularly distributed and communicated with the blind screw holes; a ball slot case includes a ball bearing seat fixed to the bottom of the blind screw hole and a cover that covers the ball bearing seat a ball groove cover, the first ball surface of the ball groove cover facing the first surface of the ball groove cover is recessed by a first angle extending radially inward from an outer edge of the circumferential surface thereof, wherein The first ball blind groove defines a first half opening at one end of the outer edge of the circumferential surface, and the ball groove cover faces a second surface of the ball bearing seat, and a plurality of recesses are radially inward from the outer edge of the circumferential surface thereof. a second ball blind slot extending from the second angle, the second ball blind slot forming a second half opening at one end of the outer edge of the second surface, the first angle being different from the second angle, each A ball blind groove corresponds to one of the second ball blind grooves and meets at an angle to each other, and is even at the intersection thereof Forming a receiving space, the ball groove cover is provided with a rotating interface facing the plane of the ball bearing seat to drive the ball groove cover to rotate on the second surface relative to the first surface of the ball bearing seat; a plurality of balls, The pair of first and second ball grooves are respectively disposed in the accommodating spaces; and a bolt lock nip block, the rod portion is screwed into the blind screw hole of the casing body, the head The diameter of the portion is larger than the diameter of the body of the casing, and the bolt-locking pressure-bonding block is provided with a through-center passage. The positioning locking device of claim 1, wherein an extension line of a central axis of each of the first ball blind grooves does not pass through a center point of the first surface, and each of the second balls is blind The extension of the central axis of the slot passes through the center point of the second surface. The positioning locking device of claim 1, wherein an extension line of a central axis of each of the first ball blind grooves passes through a center point of the first surface, and each of the second ball blind grooves The extension of the central axis does not pass through the center point of the second surface. The positioning locking device of claim 1, further comprising: a ball adjusting member penetrated by the central passage and connected to the rotating interface of the ball groove cover by a joint interface, by rotating the ball The ball adjusting member interlocks the joint interface with the ball groove cover to rotate the ball groove cover clockwise or counterclockwise with respect to the ball groove. The positioning locking device of claim 1, wherein the adjacent first ball blind grooves of the first ball blind grooves have the same angle. The positioning and locking device of claim 1 or 5, wherein the adjacent two second ball blind grooves of the second ball blind grooves have the same angle. The positioning locking device of claim 1 or 4, wherein the balls have a diameter smaller than a groove width of the first ball blind groove and the second ball blind groove. The positioning locking device of claim 1 or 4, wherein the first ball blind groove and the second ball blind groove are each three. The positioning locking device of claim 1, wherein the rotating interface of the first ball blind groove is a groove having a non-circular cross section. The positioning locking device of claim 4, wherein the rotating interface of the first ball blind groove is a groove having a non-circular cross section, and the cross-sectional shape of the joint interface of the adjusting rod corresponds to The cross-sectional shape of the groove of the non-circular cross section. The positioning locking device of claim 1, wherein the bottom of the blind screw hole has at least one recess, and the bottom surface of the ball bearing seat is provided with a protrusion embedded in the recess corresponding to the position of the recess. . The positioning locking device according to claim 1, wherein the head of the bolt locking hydrating block is a hexagonal head bolt head shape. The positioning locking device of claim 1 or 4, wherein the first half opening of each first bead rolling blind groove and/or the second second of each second bead rolling blind groove The half opening further includes a retracting structure such that the diameter composed of the first half opening and the second half opening is slightly smaller than the diameter of the ball.