CN220825847U - Bead-changing switching sand-casting seat device of water drill grinding and polishing machine - Google Patents

Abstract

The utility model discloses a bead-changing and transferring sand-casting seat device of a water drill grinding and polishing machine, which comprises a transferring bracket arranged on a bead-changing and transferring sand-casting seat body. This diamond grinds change pearl switching foundry sand seat device of machine, through being provided with prop up solid subassembly, through rotating T shape commentaries on classics handle, can drive reverse threaded rod and rotate inside the internal movable groove, when making two sets of cover boards remove to the one end that is close to the other side, also make first U-shaped frame and second U-shaped frame remove to being close to the diamond grinds the organism contact ground end, when driving stable picture peg and inserting and establish in the second U-shaped frame inslot, be connected between first U-shaped frame and the second U-shaped frame, also fix the diamond grinds the organism drill bit department, when temporarily putting, ensure stability, when supporting the operation to it, avoid producing the circumstances of falling to the ground collision when the no holding power in the diamond grinds the organism department simultaneously, in the during operation, also can accomplish and place at any time, thereby improve the convenience in the use.

Description

Bead-changing switching sand-casting seat device of water drill grinding and polishing machine

Technical Field

The utility model relates to the field of accessories of a water drill grinding and polishing machine, in particular to a bead-changing and transferring sand-casting seat device of the water drill grinding and polishing machine.

Background

The water drill polishing machine can help to install accessories such as suspended ceilings, walls, doors and windows, and the like so as to improve the working efficiency,

When the water drill is used for building, the water drill can also help to build household facilities, drain holes and the like can be conveniently and rapidly drilled on the ground through the connecting support, so that the layout of the facilities is more flexible, the bead-changing switching sand-casting seat device which is used in a matched mode can be installed and can be used for turning over and the like, and the machine body can work more flexibly;

According to the patent document: the Chinese patent publication No. CN218801298U discloses a full-automatic water drill processing polishing machine, which comprises a base box and a picking frame. The beneficial effects are that: according to the utility model, the grinding and polishing belt capable of changing the grinding and polishing angle and the rotatable water drill seat are adopted, when the water drill is polished, the bottom of the water drill can be downwards inserted into the water drill seat, the driving motor is started to drive the driving roller to rotate, and then the grinding and polishing belt is driven to rotate, after one section is polished, the servo motor drives one rotating column to rotate, the water drill seat is driven to rotate while the water drill is driven to rotate, meanwhile, through the meshing of gears, all the water drill seats drive the water drill to rotate, the horizontal angle of a polishing surface is changed, the second electric push rod stretches and contracts, the mounting frame and the grinding and polishing belt are driven to rotate up and down along the first hinging seat, the vertical grinding and polishing angle is changed, and the device can simultaneously finish independent grinding and polishing of a plurality of water drills.

At present, the traditional bead-changing transfer sand-casting seat device of the water drill grinding and polishing machine is composed of a bead-changing transfer sand-casting seat body, a transfer support, a water drill grinding and polishing machine body and other structural combinations, when the water drill grinding and polishing machine is applied, the transfer support is used for connecting the bead-changing transfer sand-casting seat with the water drill grinding and polishing machine body and then conducting operations such as overturning on the machine body through operation, but when the water drill grinding and polishing machine works, temporary placing situations exist, if a temporary placing or leaning place is not arranged in a working area, a water drill cannot be fixed at the moment, placing is completed, meanwhile, connection between the water drill and the water drill grinding and polishing machine body cannot be conducted, stability is improved, meanwhile, placing is conducted anytime and anywhere, and convenience in a use process is improved.

Disclosure of utility model

The utility model aims to provide a bead-changing transfer sand-turning seat device of a water drill grinding and polishing machine, which is used for solving the problems that the bead-changing transfer sand-turning seat device of the traditional water drill grinding and polishing machine in the background art is structurally combined by a bead-changing transfer sand-turning seat body, a transfer support, a water drill grinding and polishing machine body and the like, and when the bead-changing transfer sand-turning seat device is applied, the transfer support is used for connecting the bead-changing transfer sand-turning seat with the water drill grinding and polishing machine body and then performing operations such as turning the machine body and the like, but when the water drill grinding and polishing machine body is in operation, temporary placement cannot be performed at the moment if a temporary placement or leaning place is not arranged in a working area, placement is completed, and meanwhile, the water drill cannot be connected with the seat body, so that stability is improved, and convenience in the use process is improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the bead-changing switching sand-casting seat device of the water drill grinding and polishing machine comprises a switching bracket arranged on a bead-changing switching sand-casting seat body, wherein a water drill grinding and polishing machine body is arranged on the switching bracket, and a supporting and fixing component is arranged between the bead-changing switching sand-casting seat body and the water drill grinding and polishing machine body;

The support assembly comprises a first U-shaped frame and a second U-shaped frame, the first U-shaped frame and the second U-shaped frame are respectively symmetrically sleeved at the lower end of the outside of the diamond polishing machine body, an inner movable groove is formed in the inner part of the bead change transfer sand casting seat body, which is close to one side of the diamond polishing machine body, a reverse threaded rod is movably mounted in the inner movable groove through a bearing, one end of the reverse threaded rod penetrates through a T-shaped rotating handle corresponding to the bead change transfer sand casting seat body, sleeve plates are connected to the two ends of the reverse threaded rod through threads, a vertical rod is vertically mounted at one end of the outer part of the sleeve plates, a transverse rod is horizontally mounted at one end of the vertical rod, the other end of the transverse rod is arranged above the corresponding first U-shaped frame and the corresponding second U-shaped frame, a packing assembly is arranged between the transverse rod and the first U-shaped frame and the second U-shaped frame, a protection structure is arranged at the bottom of the bead change sand casting seat body, and a limit structure is arranged between the bead change sand casting seat body and the sleeve plates.

Preferably, the protection structure comprises a plurality of groups of underframes, the underframes are respectively arranged at four corners of the bottom of the bead changing and transferring foundry sand base body, and corresponding round convex pads are glued at the bottom of the underframe.

Preferably, a handle sleeve is sleeved outside the T-shaped rotating handle, and anti-skid patterns are arranged on the outer surface of the handle sleeve.

Preferably, the limit structure comprises a stable slide bar, the front end and the rear end of one side of the outer wall of the bead change transfer sand casting seat body are provided with external plates, the stable slide bar is arranged between two groups of external plates, and the sleeve plate is connected to the stable slide bar in a sliding manner.

Preferably, the inside of the first U-shaped frame is glued with a second inner pad, two ends of the inner corner of the second U-shaped frame are glued with a first inner pad, and the bottoms of the first U-shaped frame and the second U-shaped frame are glued with an anti-slip bottom pad.

Preferably, a stabilizing plugboard is installed in a groove at one end of the inner portion of the first U-shaped frame, and the other end of the stabilizing plugboard is clamped in a corresponding groove formed in the second U-shaped frame.

Preferably, the packing up assembly includes multiunit connecting piece, the connecting piece is installed respectively at the upper surface that first U-shaped frame and second U-shaped frame deviate from other side one end, the pivot is installed to the connecting piece outer end, the inside rotation of pivot is connected with corresponding rotary drum, the top of rotary drum is installed at the horizontal pole bottom that corresponds, the inslot that deviates from on the horizontal pole and trades pearl switching foundry sand pedestal one end has corresponding screw thread locating lever through threaded connection, the bottom of screw thread locating lever is glued to have a protruding end.

Compared with the prior art, the utility model has the beneficial effects that:

1. Through being provided with the support assembly, through rotating the T-shaped rotating handle, the reverse threaded rod can be driven to rotate in the inner movable groove, when two sets of sleeve plates move to one end close to each other, the first U-shaped frame and the second U-shaped frame move to the end close to the ground of the water drill grinding and polishing machine body, when the stable inserting plate is driven to be inserted in the second U-shaped frame groove, the first U-shaped frame and the second U-shaped frame are connected, the drill bit of the water drill grinding and polishing machine body is also fixed, when the water drill grinding and polishing machine body is temporarily placed, stability is ensured, when the water drill grinding and polishing machine body is temporarily placed, the situation of ground falling collision is avoided when no supporting force exists at the water drill grinding and polishing machine body, and when the water drill grinding and polishing machine is in operation, placement at any time and any place can be completed, so that convenience in the use process is improved;

2. Through being provided with and packing up the subassembly, move first U-shaped frame and second U-shaped frame to keeping away from opposite side one end, contact is fixed to the diamond mill polishing organism department, this moment is because the rotary drum rotates to be connected inside the pivot, transverse rod is in connected state with the rotary drum, be in the state of being connected between connecting piece and the corresponding first U-shaped frame and the second U-shaped frame, this moment through first U-shaped frame and the second U-shaped frame of upset to transverse rod end, when rotating to being in same horizontal state with transverse rod bottom, rotate screw thread locating lever and laminate first U-shaped frame or second U-shaped frame upper surface, the protruding end of end is the rubber material in bottom can improve the frictional force of contact surface, when above going up the operation with first U-shaped frame and second U-shaped frame, pack up the operation, carry out fixed operation to the junction after packing up, be convenient for accomodate, improve whole result of use.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of a front perspective cutaway structure of the present utility model;

FIG. 3 is a schematic view of a left side perspective cross-sectional structure of the present utility model;

FIG. 4 is a schematic view of a partial structure of a bottom perspective section of the present utility model;

FIG. 5 is a schematic view of a front perspective cutaway structure of the present utility model;

FIG. 6 is a schematic view of a partial structure in a top perspective section of the present utility model;

FIG. 7 is a schematic view of a left side perspective cutaway partial structure of the present utility model;

FIG. 8 is an enlarged schematic view of the structure of FIG. 5A according to the present utility model;

fig. 9 is an enlarged schematic view of the structure of fig. 6B according to the present utility model.

In the figure: 1. bead-changing transfer sand-casting seat body; 101. a transfer bracket; 102. a water drill grinding and polishing machine body; 2. a first U-shaped frame; 201. a second U-shaped frame; 202. an anti-slip bottom pad; 203. an inner movable groove; 204. a reverse threaded rod; 205. a T-shaped rotating handle; 206. a handle sleeve; 207. a sleeve plate; 208. an external plate; 209. a stabilizing slide bar; 3. a chassis; 301. a circular convex pad; 302. a first inner pad; 303. a second inner pad; 304. stabilizing the plugboard; 4. a connecting piece; 401. a transverse rod; 402. a rotating shaft; 403. a rotating drum; 404. a threaded positioning rod; 405. a bottom convex end; 406. and (5) vertically arranging a rod.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, 2, 3, 4, 5, 6, 7 and 9, the present utility model provides a technical solution: the bead-changing switching sand-casting seat device of the water drill grinding and polishing machine comprises a switching support 101 arranged on a bead-changing switching sand-casting seat body 1, and in order to fix the drill bit of a water drill grinding and polishing machine body 102, stability is ensured during temporary placement, supporting operation is carried out on the water drill grinding and polishing machine body 102 is arranged on the switching support 101, and a supporting and fixing assembly is arranged between the bead-changing switching sand-casting seat body 1 and the water drill grinding and polishing machine body 102; the support and fixation assembly comprises a first U-shaped frame 2 and a second U-shaped frame 201, the first U-shaped frame 2 and the second U-shaped frame 201 are respectively and symmetrically sleeved at the lower end of the outside of the diamond grinding and polishing machine body 102, an inner movable groove 203 is formed in the inner part of one side of the bead changing and transferring sand stirring seat body 1, which is close to the diamond grinding and polishing machine body 102, a reverse threaded rod 204 is movably mounted in the inner movable groove 203 through a bearing, one end of the reverse threaded rod 204 penetrates through the bead changing and transferring sand stirring seat body 1 and is movably provided with a corresponding T-shaped rotating handle 205, two ends on the reverse threaded rod 204 are connected with sleeve plates 207 through threads, one end of the outside of the sleeve plates 207 is vertically provided with a vertical rod 406, one end above the vertical rod 406 is horizontally provided with a transverse rod 401, and the other end of the transverse rod 401 is arranged above the corresponding first U-shaped frame 2 and second U-shaped frame 201; through rotating T shape twist grip 205, can drive reverse threaded rod 204 and rotate in interior movable groove 203, when making two sets of sleeve plates 207 to the one end that is close to the other side remove, also make first U-shaped frame 2 and second U-shaped frame 201 to be close to the brill mill and throw organism 102 contact ground end and remove, when driving stable picture peg 304 to insert and establish in the groove of second U-shaped frame 201, connect between first U-shaped frame 2 and the second U-shaped frame 201, also fix brill mill and throw organism 102 drill bit department, when temporarily put, ensure stability, when supporting the operation to it, avoid producing the circumstances of falling the ground collision when no holding force in brill mill and throw organism 102 department simultaneously, at the during operation, also can accomplish and place at any time, thereby improve the convenience in the use.

Referring to fig. 4, 5, 6, 7 and 9, in order to protect the contact surface between the bead-exchanging and sand-casting seat 1 and the ground, a protection structure is arranged at the bottom of the bead-exchanging and sand-casting seat 1, the protection structure comprises a plurality of groups of bottom frames 3, the bottom frames 3 are respectively arranged at four corners of the bottom of the bead-exchanging and sand-casting seat 1, and corresponding circular convex pads 301 are glued at the bottom of the bottom frames 3; the handle sleeve 206 is sleeved outside the handle of the T-shaped rotating handle 205, and anti-skid patterns are arranged on the outer surface of the handle sleeve 206; a limiting structure is arranged between the bead change transfer sand casting seat body 1 and the sleeve plate 207, the limiting structure comprises a stable sliding rod 209, an external plate 208 is arranged at the front end and the rear end of one side of the outer wall of the bead change transfer sand casting seat body 1, the stable sliding rod 209 is arranged between the two groups of external plates 208, and the sleeve plate 207 is connected on the stable sliding rod 209 in a sliding manner; the second inner pad 303 is glued to the inside of the first U-shaped frame 2, the first inner pad 302 is glued to both ends of the inner corner of the second U-shaped frame 201, and the anti-slip base pad 202 is glued to the bottoms of the first U-shaped frame 2 and the second U-shaped frame 201; a stabilizing plugboard 304 is arranged in a groove at one end of the inner part of the first U-shaped frame 2, and the other end of the stabilizing plugboard 304 is clamped in a corresponding groove arranged on the second U-shaped frame 201; when the bead-changing transfer sand-casting seat body 1 is fixed or placed on the ground of a working area, the underframe 3 is arranged at four corners of the bottom of the bead-changing transfer sand-casting seat body 1, and the round convex pad 301 made of rubber material is glued at the bottom of the underframe 3, so that direct contact is avoided when the bead-changing transfer sand-casting seat body 1 is placed or connected, and the contact surface between the bead-changing transfer sand-casting seat body 1 and the ground is protected; when the T-shaped rotating handle 205 is rotated, the hand is contacted with the handle sleeve 206, and the handle sleeve 206 is made of rubber, so that the phenomenon that the hand slips during rotation can be avoided; the external plates 208 are arranged at the front and rear ends of the outer wall of the bead change transfer sand casting seat body 1, the stable slide bars 209 are arranged between the external plates 208, the sleeve plate 207 is connected to the stable slide bars 209 in a sliding manner, and when the sleeve plate 207 moves, the sleeve plate 207 also slides on the stable slide bars 209, so that the stability is ensured, and meanwhile, the moving position is also subjected to limit treatment; the bottoms of the first U-shaped frame 2 and the second U-shaped frame 201 are glued with an anti-slip bottom pad 202, the contact surface is protected, the inside of the second U-shaped frame 201 is glued with a first inner pad 302, the inside of the first U-shaped frame 2 is glued with a second inner pad 303, the first inner pad 302 and the second inner pad 303 are all made of rubber materials, and when the outside of the diamond grinding and polishing machine body 102 is fixed, the friction force of the contact surface can be increased, and meanwhile, the connecting surface is also protected.

Referring to fig. 1, 2, 5 and 8, in order to retract the first U-shaped frame 2 and the second U-shaped frame 201, a retraction assembly is arranged between the transverse rod 401 and the first U-shaped frame 2 and the second U-shaped frame 201, the retraction assembly comprises a plurality of groups of connecting pieces 4, the connecting pieces 4 are respectively arranged on the upper surfaces of one ends of the first U-shaped frame 2 and the second U-shaped frame 201, which are away from each other, the outer ends of the connecting pieces 4 are provided with rotating shafts 402, the interiors of the rotating shafts 402 are rotationally connected with corresponding rotating cylinders 403, the tops of the rotating cylinders 403 are arranged at the bottoms of the corresponding transverse rods 401, corresponding threaded positioning rods 404 are connected in grooves of one ends of the transverse rods 401, which are away from the bead change-over foundry sand seat 1, and bottom convex ends 405 are glued on the bottoms of the threaded positioning rods 404; when the first U-shaped frame 2 and the second U-shaped frame 201 are moved to one end far away from each other and the contact is carried out on the position of the diamond grinding and polishing machine body 102, at the moment, the rotary drum 403 is rotationally connected inside the rotary shaft 402, the transverse rod 401 and the rotary drum 403 are in a connection state, the connecting piece 4 and the corresponding first U-shaped frame 2 and the corresponding second U-shaped frame 201 are in a connection state, at the moment, the first U-shaped frame 2 and the second U-shaped frame 201 are turned over towards the end of the transverse rod 401, when the transverse rod 401 and the bottom of the transverse rod 401 are in the same horizontal state, the threaded positioning rod 404 is rotated to attach the upper surfaces of the first U-shaped frame 2 or the second U-shaped frame 201, the bottom convex end 405 is made of rubber materials, so that the friction force of the contact surface can be improved, and when the first U-shaped frame 2 and the second U-shaped frame 201 are folded, the connection position is fixedly operated after being folded, and the whole use effect is improved when being stored is convenient.

Working principle: firstly, the bead-changing transfer sand-casting seat device of the traditional water drill grinding and polishing machine is formed by combining the structures of a bead-changing transfer sand-casting seat body 1, a transfer support 101, a water drill grinding and polishing machine body 102 and the like, when the water drill grinding and polishing machine is applied, the transfer support 101 is rotationally connected to the support on the bead-changing transfer sand-casting seat body 1, the other end of the transfer support 101 is connected with the water drill grinding and polishing machine body 102, when the water drill grinding and polishing machine body 102 needs to be fixedly supported, the reverse threaded rod 204 is driven to rotate in the inner movable groove 203 under the action of the force by rotating the T-shaped rotating handle 205, the sleeve plate 207 is in threaded connection with the front end and the rear end of the reverse threaded rod 204, the transverse rod 401 is horizontally arranged between the reverse threaded rod 204 and the corresponding first U-shaped frame 2 and the second U-shaped frame 201, the reverse threaded rod 204 is driven to rotate in the inner movable groove 203, and simultaneously drives the two sets of sleeve plates 207 to move towards one end far away from or close to each other, when moving towards one end close to each other, the first U-shaped frame 2 and the second U-shaped frame 201 are also driven to move towards the ground contact end close to the diamond polishing machine body 102, when the stable inserting plate 304 is driven to be inserted into the groove of the second U-shaped frame 201, the first U-shaped frame 2 and the second U-shaped frame 201 are connected, the drill bit of the diamond polishing machine body 102 is also fixed, when the diamond polishing machine body is temporarily placed, the stability is ensured, meanwhile, the support operation is carried out, the situation of falling collision is avoided when no support force exists at the diamond polishing machine body 102, and when the diamond polishing machine is placed at any time and any place, the convenience in the use process is also improved;

When the first U-shaped frame 2 and the second U-shaped frame 201 are moved to one end far away from each other and the contact is performed to fix the position of the diamond polishing machine body 102, at this time, because the rotary drum 403 is rotationally connected inside the rotary shaft 402, the transverse rod 401 and the rotary drum 403 are in a connection state, the connecting piece 4 is in a connection state with the corresponding first U-shaped frame 2 and the corresponding second U-shaped frame 201, at this time, the first U-shaped frame 2 and the second U-shaped frame 201 are turned towards the end of the transverse rod 401, when the first U-shaped frame 2 or the second U-shaped frame 201 is rotated to be in the same horizontal state with the bottom of the transverse rod 401, the threaded positioning rod 404 is rotated to attach the upper surface of the first U-shaped frame 2 or the second U-shaped frame 201, the bottom convex end 405 is made of rubber material, so that the friction force of the contact surface can be improved, when the first U-shaped frame 2 and the second U-shaped frame 201 are folded, the connection position is fixedly operated after folding, the whole use effect is improved, and the whole use process is convenient when the whole device is stored.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The bead-changing switching sand-casting seat device of the water drill grinding and polishing machine comprises a switching support (101) arranged on a bead-changing switching sand-casting seat body (1), and is characterized in that: the diamond grinding and polishing machine body (102) is arranged on the switching support (101), and a supporting and fixing assembly is arranged between the bead changing switching sand casting seat body (1) and the diamond grinding and polishing machine body (102);

The utility model provides a sand box, including frame (2) and second U-shaped frame (201), first U-shaped frame (2) and second U-shaped frame (201) symmetry cover are established respectively and are ground the lower extreme of throwing organism (102) outside at the water brill, trade pearl switching foundry a pedestal (1) and be close to the inside of grinding the throwing organism (102) one side and seted up interior movable groove (203), the inside of interior movable groove (203) is through bearing movable mounting reverse threaded rod (204), and the one end of reverse threaded rod (204) runs through in changing pearl switching foundry a pedestal (1) movable mounting T shape change handle (205) that corresponds, both ends on reverse threaded rod (204) all have sleeve plate (207) through threaded connection, the vertical setting pole (406) of one end horizontal setting of sleeve plate (207) outside, and the other end setting of horizontal setting pole (401) has on corresponding first U-shaped frame (2) and second U-shaped frame (201), it has a pedestal (207) to change between the pearl switching between the frame (201) and the second side, and the frame (201) is set up between the frame and the frame (201) is changed and is changeed a pedestal.

2. The bead changing and transferring sand casting seat device of the water drill grinding and polishing machine according to claim 1, wherein the bead changing and transferring sand casting seat device is characterized in that: the protection structure comprises a plurality of groups of underframe (3), the underframe (3) is respectively arranged at four corners of the bottom of the bead changing and transferring foundry sand base body (1), and a corresponding circular convex pad (301) is glued at the bottom of the underframe (3).

3. The bead changing and transferring sand casting seat device of the water drill grinding and polishing machine according to claim 2, wherein the bead changing and transferring sand casting seat device is characterized in that: the handle sleeve (206) is sleeved outside the handle of the T-shaped rotating handle (205), and anti-skid patterns are arranged on the outer surface of the handle sleeve (206).

4. The bead changing and transferring sand casting seat device of the water drill grinding and polishing machine according to claim 1, wherein the bead changing and transferring sand casting seat device is characterized in that: the limiting structure comprises a stabilizing slide bar (209), the front end and the rear end of one side of the outer wall of the bead changing transfer sand casting seat body (1) are provided with external plates (208), the stabilizing slide bar (209) is arranged between two groups of external plates (208), and the sleeve plate (207) is in sliding connection with the stabilizing slide bar (209).

5. The bead changing and transferring sand casting seat device of the water drill grinding and polishing machine according to claim 1, wherein the bead changing and transferring sand casting seat device is characterized in that: the inside of first U-shaped frame (2) glues has second inner pad (303), the both ends of second U-shaped frame (201) inside corner all glue have first inner pad (302), the bottom of first U-shaped frame (2) and second U-shaped frame (201) all glues has slipmat (202).

6. The bead changing and transferring sand casting seat device of the water drill grinding and polishing machine according to claim 1, wherein the bead changing and transferring sand casting seat device is characterized in that: a stabilizing plugboard (304) is arranged in a groove at one end of the inner part of the first U-shaped frame (2), and the other end of the stabilizing plugboard (304) is clamped in a corresponding groove arranged on the second U-shaped frame (201).

7. The bead changing and transferring sand casting seat device of the water drill grinding and polishing machine according to claim 1, wherein the bead changing and transferring sand casting seat device is characterized in that: the assembly is packed up including multiunit connecting piece (4), connecting piece (4) are installed respectively at the upper surface that first U-shaped frame (2) and second U-shaped frame (201) deviate from other side one end, pivot (402) are installed to connecting piece (4) outer end, the inside rotation of pivot (402) is connected with rotary drum (403) that correspond, horizontal pole (401) bottom at the correspondence is installed at the top of rotary drum (403), there is corresponding screw thread locating lever (404) in deviating from the inslot of change pearl switching foundry sand pedestal (1) one end on horizontal pole (401), the bottom gluing of screw thread locating lever (404) has protruding end (405) in the bottom.