Double-insurance connecting structure for rack of automatic grinding machine

Abstract

The utility model relates to a double-insurance connecting structure for a rack of an automatic grinding machine, the rack comprises a cross beam, a cross beam supporting leg and a supporting leg support, the structure comprises a quick clamp and a detachable twist lock, the quick clamp and the detachable twist lock are respectively in quick connection and auxiliary connection with the cross beam supporting leg and the supporting leg support, and the cross beam supporting leg is provided with a bottom plate with a rectangular through hole. The supporting leg support is provided with a top plate with a lower rectangular through hole, the upper rectangular through hole and the lower rectangular through hole directly face each other to form a rectangular through hole, and the detachable twist lock is installed on the top plate of the supporting leg support and comprises a twist head which can be manually switched between a locking position and an unlocking position and is provided with a special-shaped end. At the locking position, the torsion head penetrates through the rectangular through hole, and the special-shaped end head is arranged above the bottom plate of the cross beam supporting leg and stretches across the rectangular through hole; and at the unlocking position, the special-shaped end of the torsion head directly faces the rectangular through hole so that the torsion head can be separated from the bottom plate of the beam supporting leg. According to the utility model, double insurance is provided for the connection of the cross beam supporting leg and the supporting leg bracket through the quick clamp and the detachable twist lock.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power blade production equipment technical field especially relates to double insurance connecting structure for automatic polisher frame. BACKGROUND

[0002] The frame used for wind power blade production equipment, for example, the frame of a wind power blade joint root automatic polisher designed by the applicant, comprises a crossbeam, a crossbeam leg and a leg support above the leg support, a kind of mode that the crossbeam leg and the leg support are quickly and stably connected in the prior art is to use quick clamp, however, since wind power blade production equipment is all large machinery, the crossbeam leg and the leg support are in upper and lower assembly relationship, in case quick clamp appears damage, security accident is prone to occur. Therefore, it is urgent to take additional safety measures for the connection of the crossbeam leg and the leg support. SUMMARY

[0003] In order to solve the above problems of the prior art, the utility model provides a kind of double insurance connecting structure for automatic polisher frame, which is beneficial.

[0004] To achieve the above object, the utility model provides a kind of double insurance connecting structure for automatic polisher frame, the automatic polisher frame includes crossbeam, crossbeam leg and leg support, the double insurance connecting structure includes the quick clamp for quickly connecting the crossbeam leg and the leg support, it is characterized in that it further includes the detachable torsion lock for auxiliary connection of the crossbeam leg and the leg support, wherein the bottom of the crossbeam leg has the bottom plate with upper rectangular through hole, the top of the leg support has the top plate with lower rectangular through hole, the upper rectangular through hole and the lower rectangular through hole are arranged opposite to form rectangular through hole, the detachable torsion lock is installed on the top plate of the leg support and includes the torsion head that can be manually converted in locking position and unlocking position and with special-shaped end, in locking position, the torsion head penetrates rectangular through hole and its special-shaped end is located above the bottom plate of the crossbeam leg and straddles rectangular through hole to lock the crossbeam leg and the leg support together;In unlocking position, the special-shaped end of the torsion head is opposite rectangular through hole so that the torsion head can be separated from the bottom plate of the crossbeam leg to unlock the locking of the crossbeam leg and the leg support.

[0005] In the utility model, the quick clamp is provided, the quick connection between the crossbeam leg and the leg support can be realized, the detachable torsion lock is provided, an additional insurance is added for the connection between the crossbeam leg and the leg support, and the detachable torsion lock is simple in locking structure and convenient to operate for the connection between the crossbeam leg and the leg support.

[0006] Further, the detachable torsion lock includes:

[0007] The fixed plate is provided with a pair of supporting columns, a pair of limiting blocks and an intermediate block between the pair of limiting blocks, and a pair of handle limiting spaces are formed between the intermediate block and the pair of limiting blocks;

[0008] The floating plate is located on the pair of supporting columns of the fixed plate and is fastened with the fixed plate via the fixing bolts penetrating the pair of supporting columns, and the floating plate is provided with a central supporting column and a first central through hole penetrating the central supporting column and the floating plate, and a handle operating space is formed between the floating plate and the fixed plate;

[0009] The twist head includes a twist head columnar body penetrating the first central through hole and the above-mentioned special-shaped end head supported above the central supporting column, wherein the twist head columnar body is provided with a limiting fastener at a position below the floating plate;

[0010] The handle is pivotally installed on the twist head columnar body below the limiting fastener, so that the handle can rotate with the twist head in the handle operating space to realize the position conversion of the special-shaped end head of the twist head between the locked position and the unlocked position, and the handle can be limited in one of the handle limiting spaces in the locked position and the unlocked position, respectively.

[0011] Through the above-mentioned structure of the fixed plate, the floating plate can be fastened together and the handle operating space and the pair of handle limiting spaces are formed; through the above-mentioned structure of the floating plate, the twist head and the handle, the position conversion of the special-shaped end head of the twist head between the locked position and the unlocked position is realized; through the provision of the central supporting column on the floating plate and the installation of the limiting fastener on the twist head columnar body below the floating plate, the up-and-down position of the twist head is limited; through the pivotable installation structure of the handle relative to the twist head columnar body, the handle can both rotate with the twist head and move in and out of the handle limiting space. The entire twist lock does not use any spring, gear and other structures, and is simple in structure, detachable and convenient to use.

[0012] Further, a gasket installation groove is provided on the twist head columnar body, and a round nut stop gasket is installed in the gasket installation groove, wherein the gasket installation groove is located above the limiting fastener, and the limiting fastener is a round nut.

[0013] Through the above-mentioned structure, the twist head cannot be separated upward from the floating plate.

[0014] Further, the above-mentioned special-shaped end head of the twist head has a cuboid locking part, which spans the rectangular through hole when the special-shaped end head is in the locked position, and faces the rectangular through hole when the special-shaped end head is in the unlocked position.

[0015] By the above structure, the special-shaped end head is arranged staggered relative to the rectangular through hole of the beam leg and the leg support in the locking position, so as to be unable to be separated from the rectangular through hole; and in the unlocking position, the cuboid locking part is opposite to the rectangular through hole, so as to be able to be separated from the rectangular through hole, that is, the beam leg above can be separated from the interference and locking of the special-shaped end head.

[0016] Further, the center support column of the floating plate is a rectangular column body capable of penetrating the rectangular through hole, the cuboid locking part of the special-shaped end head crosses the rectangular column body at right angles when the special-shaped end head is in the locking position, so as to be staggered by 90°; and the cuboid locking part is aligned with the rectangular column body when the special-shaped end head is in the unlocking position.

[0017] By the above structure, the special-shaped end head of the twist head can be supported on the center support column of the floating plate in both the locking position and the unlocking position, and the center support column of the floating plate can enter the rectangular through hole of the beam leg and the leg support, so as to always maintain the support on the special-shaped end head.

[0018] Further, the twist head column body has a circular nut mounting part below the gasket mounting groove, an outer thread is arranged on the outer circumferential surface of the circular nut mounting part to cooperate with the limiting fastener, and the twist head column body has a handle bearing part below the circular nut mounting part, the diameter of the handle bearing part is smaller than the diameter of the circular nut mounting part.

[0019] By the above structure, the limiting fastener can be smoothly screwed to the circular nut mounting part through the handle bearing part.

[0020] Further, the handle has a handle mounting part with both sides being flat at one end, a longitudinally extending handle operating slot corresponding to the handle mounting part is arranged on the handle bearing part of the twist head column body, and the handle mounting part of the handle is mounted on the twist head column body in the handle operating slot through a connecting bolt, so that the handle can drive the twist head to rotate, and on the other hand, the handle mounting part can pivot around the connecting bolt in the range of the handle operating slot, so that the handle pivots around the connecting bolt to move out of or into the handle limiting space on the fixed plate.

[0021] Further, the floating plate is adapted to be detachably mounted on the bottom surface of the top plate of the leg support through a fastening bolt.

[0022] In the above locking position, the detachable twist lock is fixed on the top plate of the leg support through the floating plate on one hand, and the special-shaped end head spans the rectangular through hole of the beam leg and the leg support above on the other hand, so that the beam leg and the leg support are locked together.

[0023] Further, the pair of support columns of the fixed plate are arranged at intervals and a pair of column center holes penetrating the pair of support columns are arranged on the pair of support columns, the fixed bolt is a hexagonal cup head shoulder bolt, a pair of bolt fixing holes are arranged on the floating plate in correspondence, and the fixed bolt is fastened in the bolt fixing hole from the bottom of the fixed plate and penetrates the column center hole.

[0024] Through the above structure, the floating plate and the fixed plate are fixedly connected together.

[0025] Further, a second center hole is arranged on the fixed plate in correspondence with the first center hole, the second center hole is arranged to penetrate the head-twisted columnar body, and the second center hole is located between the pair of support columns.

[0026] Through the arrangement of the second center hole on the fixed plate, the installation of the head twist is more convenient.

[0027] The above aspects and other aspects of the utility model will be more clearly described by referring to the embodiments described below. BRIEF DESCRIPTION OF DRAWINGS

[0028] The structure, further purposes and advantages of the utility model will be better understood through the following description in combination with the drawings, wherein the same reference signs represent the same elements:

[0029] Figure 1 It is a structure schematic view of the automatic polishing machine rack with double safety connection structure according to one specific embodiment of the utility model and applied to the automatic polishing machine;

[0030] Figure 2 It is Figure 1 It is a side view of the automatic polishing machine shown in Fig. 1 from the right side;

[0031] Figure 3 It is Figure 2 It is an enlarged view of the part I circled in Fig. 1;

[0032] Figure 4 It is Figure 1 It is a front view of the detachable twist lock of the automatic polishing machine rack with double safety connection structure shown in Fig. 1 when the detachable twist lock is in the locked state;

[0033] Figure 5 It is Figure 4 It is an exploded view of the detachable twist lock shown in Fig. 1;

[0034] Figure 6 It is Figure 4 It is a top view of the detachable twist lock shown in Fig. 1;

[0035] Figure 7 It is Figure 4 It is a front view of the detachable twist lock shown in Fig. 1 when the detachable twist lock is in the unlocked state;

[0036] Figure 8 yes Figure 1 The automatic grinder shown is a cross-sectional view along line BB, in which the removable twist lock is locked.

[0037] Figure 9 yes Figure 8 Enlarged view of the circled part II;

[0038] Figure 10 Yes. Figure 1 The automatic grinder shown is a cross-sectional view along line BB, but the removable twist lock is in the unlocked state in this figure;

[0039] Figure 11 yes Figure 10 An enlarged view of the circled portion III. Detailed Implementation

[0040] The specific embodiments of this utility model will now be described in conjunction with the accompanying drawings.

[0041] According to a specific embodiment of the present invention, a double-safety connection structure for an automatic grinding machine frame is as follows: Figures 1 to 11 As shown, the frame of the automatic grinding machine 100 includes a crossbeam, crossbeam legs 1, and leg supports 2. The double-safety connection structure includes a quick-connect clamp 3 for quickly connecting the crossbeam legs 1 and leg supports 2, and also includes a detachable twist lock 4 for auxiliary connection of the crossbeam legs 1 and leg supports 2. Figures 8 to 11 As shown, the bottom of the crossbeam support leg 1 has a bottom plate 10 with an upper rectangular through hole, and the top of the support leg bracket 2 has a top plate 20 with a lower rectangular through hole. The upper and lower rectangular through holes are arranged opposite each other to form a rectangular through hole 12 (see...). Figure 9 and Figure 11 The detachable twist lock 4 is mounted on the top plate 20 of the outrigger bracket 2 and includes a locking position (see...). Figure 9 ) and unlock location (see Figure 11 The manually adjustable twist head 45, equipped with a shaped end 452, is positioned in the locked position. In this position, the twist head 45 passes through the rectangular through hole 12, with its shaped end 452 positioned above the base plate 10 of the crossbeam leg 1 and spanning the rectangular through hole 12, thereby locking the crossbeam leg 1 and the leg support 2 together. In the unlocked position, the shaped end 452 of the twist head 45 faces the rectangular through hole 12, allowing the twist head 45 to disengage from the base plate 10 of the crossbeam leg 1 to unlock the locking of the crossbeam leg 1 and the leg support 2. Specifically, in this embodiment, the twist head 45 disengages from the base plate 10 of the crossbeam leg 1 by moving the crossbeam leg 1 upwards, causing the base plate 10 of the crossbeam leg 1 to disengage from the twist head 45.

[0042] likeFigure 2 and Figure 3 as shown in the drawings and described below. Figure 1 In the embodiment, the quick clamp 3 comprises a clamp body 30 mounted on the top side of the leg support 2, a rotatable clamp 31 arranged on the clamp body 30, and a clamp hook body 32 mounted on the bottom side of the beam leg 1 and cooperating with the rotatable clamp 31. After the beam leg 1 is placed on the leg support 2, the beam leg 1 and the leg support 2 can be quickly fixed to each other by rotating the rotatable clamp 31 and lapping it on the clamp hook body 3. Since the quick clamp 3 is a standard part available on the market and is not the focus of the present application, its specific structure will not be described here.

[0043] As shown in the drawings, in the embodiment, the detachable twist lock 4 comprises a fixed plate 41, a floating plate 43, a twist head 45, and a handle 47, wherein the fixed plate 41 is provided with a pair of support columns 412, a pair of limit blocks 414, and an intermediate block 416 between the pair of limit blocks 414, and a pair of handle limiting spaces 415 are formed between the intermediate block 416 and the pair of limit blocks 414. Figures 4 to 7 The floating plate 43 is located on the pair of support columns 412 of the fixed plate 41 and is fastened together with the fixed plate 41 via the fixing bolts 42 penetrating the pair of support columns 412, and the floating plate 43 is provided with a central support column 432 and a first central through hole 430 penetrating the central support column 432 and the floating plate 43, and a handle operating space 44 is formed between the floating plate 43 and the fixed plate 41.

[0044] The twist head 45 comprises a twist head columnar body 450 mounted through the first central through hole 430 and a special-shaped end 452 supported above the central support column 432, wherein the twist head columnar body 450 is provided with a limit fastener 46 at a position below the floating plate 43.

[0045] The handle 47 is pivotally mounted on the twist head columnar body 450 below the limit fastener 46, so as to enable the handle to rotate with the twist head 45 in the handle operating space 44 to realize the position conversion of the special-shaped end 452 between a locked position (see

[0046] 、 Figure 4 、 Figure 6 and Figure 8 ) and an unlocked position (see Figure 9 、 Figure 7 and Figure 10 ), and to enable the handle 47 to be limited in one of the handle limiting spaces 415 in the locked position and the unlocked position, respectively. Specifically, in the embodiment, the special-shaped end 452 is located in the left handle limiting space 415 in the locked position (as shown in Figure 11 Figure 4 ​As shown in the figure, the handle is in the right handle limiting space 415 in the unlocking position (as shown in the figure) Figure 7

[0047] As shown in the figure Figure 5 , Figure 9 and Figure 11 As shown in the figure, the torsion head column body 450 is provided with a washer mounting groove 451, and a round nut stop washer 461 is mounted in the washer mounting groove 451, wherein the washer mounting groove 451 is located above the limiting fastener 46, and the limiting fastener 46 is a round nut.

[0048] As shown in the figure Figure 5 , Figure 6 As shown in the figure, the special-shaped end 452 has a cuboid locking portion 4520. As shown in the figure Figure 8 and Figure 9 When the special-shaped end 452 is in the locking position, the cuboid locking portion 4520 spans above the bottom plate 10 of the beam leg 1 across the rectangular through hole 12, and is arranged staggered with respect to the rectangular through hole 12, so as to be unable to be separated from the rectangular through hole 12, that is, the special-shaped end 452 interferes with the bottom plate 10 of the beam leg 1; as shown in the figure Figure 10 and Figure 11 When the special-shaped end 452 is in the unlocking position, the cuboid locking portion 4520 is opposite to the rectangular through hole 12 formed on the beam leg 1 and the leg support 2, so as to be able to be separated from the rectangular through hole 12, that is, in this case, the special-shaped end 452 no longer interferes with the beam leg 1.

[0049] As shown in the figure Figures 5 to 6 In this embodiment, the center support column 432 of the floating plate 43 is configured as a rectangular column body capable of penetrating the rectangular through hole 12, and when the special-shaped end 452 is in the locking position, the cuboid locking portion 4520 of the special-shaped end 452 is crosswise crossed with the center support column 432 in the form of a rectangular column body, so as to be staggered by 90°; when the special-shaped end 452 is in the unlocking position, the cuboid locking portion 4520 thereof is aligned with the center support column 432 in the form of a rectangular column body. Through this structure, the special-shaped end 452 can be supported on the center support column 432 of the floating plate 43 in both the locking position and the unlocking position.

[0050] It should be noted that Figure 1 One application scenario of the detachable twist lock of the present embodiment is shown, that is, applied to the beam leg 1 and the leg support 2 of the automatic polishing machine 100, and used for auxiliary connection of the beam leg 1 and the leg support 2 in addition to the quick clamp 3 for quickly connecting the beam leg 1 and the leg support 2. As shown in the figure Figure 8 and Figure 10 ​As shown, the detachable twist lock 4 is installed on the top plate 20 of the outrigger bracket 2. Specifically, the floating plate 43 of the detachable twist lock 4 is installed on the top plate 20 of the outrigger bracket 2 from below via fastening bolts (not shown). In the locked position, the central support column 432 of the floating plate 43 passes through the rectangular through hole 12, and the irregular end 452 supported on it is located above the bottom plate 10 of the crossbeam leg 1 and spans the rectangular through hole 12, thereby locking the crossbeam leg 1 and the outrigger bracket 2 together. In the unlocked position, the irregular end 452 is directly opposite the rectangular through hole 12, so that the irregular end 452 no longer interferes with the bottom plate 20 of the crossbeam leg 2, thereby unlocking the locking of the crossbeam leg 1 and the outrigger bracket 2. In other words, under these circumstances, the crossbeam leg 1 can move upward to disengage from the lock of the leg bracket 2, or the floating plate 43 of the detachable twist lock 4 can be removed from the top plate 20 of the leg bracket 2, and then the entire detachable twist lock 4 can disengage downward from the rectangular through hole 12, thereby unlocking the lock on the crossbeam leg 1 and the leg bracket 2.

[0051] like Figure 5 As shown, in this embodiment, the toggle head cylindrical body 450 has a round nut mounting portion 456 below the washer mounting groove 451. The outer circumferential surface of the round nut mounting portion 456 is provided with an external thread to cooperate with the limiting fastener 46. Furthermore, the toggle head cylindrical body 450 has a handle bearing portion 457 below the round nut mounting portion 456. The diameter of the handle bearing portion 457 is smaller than the diameter of the round nut mounting portion 456, so that the limiting fastener 46 can pass smoothly through the handle bearing portion 457 and be tightened onto the round nut mounting portion 456.

[0052] For example Figure 5 As shown, in this embodiment, the handle 47 has a handle mounting portion 470 with both sides being flat at one end. The handle bearing portion 457 of the toggle head cylindrical body 450 is provided with a longitudinally extending handle operating slot 4570 corresponding to the handle mounting portion 470. The handle mounting portion 470 of the handle 47 is mounted on the toggle head cylindrical body 450 within the handle operating slot 4570 via a connecting bolt (not shown, but it passes through the bolt hole 475 on the handle 47 and the bolt hole 458 on the toggle head 45). Thus, the handle 47 can drive the toggle head 45 to rotate, and its handle mounting portion 470 can pivot around the connecting bolt within the handle operating slot 4570, thereby allowing the handle 47 to pivot around the connecting bolt to move out of or into the handle limiting space 415 on the fixing plate 41.

[0053] like Figure 9 and Figure 11As shown, in the present embodiment, the floating plate 43 is adapted to be detachably fixed on the bottom surface of the lower one of the pair of workpieces being locked, and in particular, the floating plate 43 is adapted to be detachably mounted on the top plate 20 of the leg support 2 via fastening bolts (not shown) through the threaded holes 431 (see Figure 6 ) thereon.

[0054] Further as shown Figure 5 In the present embodiment, the pair of support columns 412 of the fixed plate 41 are spaced apart and provided with a pair of column center holes 4120 therethrough, and the fixing bolts 42 connecting the fixed plate 41 and the floating plate 43 together are hex socket head cap screws, and the floating plate 43 is correspondingly provided with a pair of bolt fixing holes 434, and the fixing bolts 42 are fastened in the bolt fixing holes 434 from the bottom of the fixed plate 41 through the column center holes 4120.

[0055] Further as shown Figure 5 In the present embodiment, the fixed plate 41 is provided with a second center through hole 410 corresponding to the first center through hole 430, the second center through hole 410 is arranged to pass through the head of the column body 450, and the second center through hole 410 is located between the pair of support columns 412. The arrangement of the second center through hole 410 makes the installation of the head 45 more convenient.

[0056] The technical content and technical features of the present utility model have been disclosed above, however, it can be understood that under the creative idea of the present utility model, the skilled in the art can make various changes and improvements to the above structure, including the combination of the technical features disclosed or claimed herein, and other combinations obviously including these features. These modifications and / or combinations all fall within the technical field to which the present utility model relates, and fall within the protection scope of the claims of the present utility model.

Claims

1. A double safety connection structure for an automatic polisher frame including a beam, a beam leg, and a leg support, the double safety connection structure including a quick clamp for quickly connecting the beam leg and the leg support, characterized in that Also included is a detachable twist lock for assisting in connecting the beam leg and the leg support, wherein the bottom of the beam leg has a bottom plate with an upper oblong through hole, the top of the leg support has a top plate with a lower oblong through hole, the upper oblong through hole and the lower oblong through hole are arranged opposite to each other to form an oblong through hole, the detachable twist lock is installed on the top plate of the leg support and includes a twist head which can be manually switched between a locked position and an unlocked position and has a special-shaped end, in the locked position, the twist head penetrates the oblong through hole and the special-shaped end is above the bottom plate of the beam leg and across the oblong through hole to lock the beam leg and the leg support together; in the unlocked position, the special-shaped end of the twist head is opposite to the oblong through hole so that the twist head can be separated from the bottom plate of the beam leg to unlock the beam leg and the leg support.

2. The double safety connection structure for the automatic polisher frame according to claim 1, wherein The detachable twist lock includes: a fixed plate, on which a pair of support columns, a pair of limiting blocks and an intermediate block between the pair of limiting blocks are arranged, a pair of handle limiting spaces are formed between the intermediate block and the pair of limiting blocks; a floating plate, which is located on the pair of support columns of the fixed plate and is fastened with the fixed plate via a fixed bolt penetrating the pair of support columns, the floating plate is provided with a center support column and a first center through hole penetrating the center support column and the floating plate, a handle operating space is formed between the floating plate and the fixed plate; the twist head, which includes a twist head columnar body penetrating the first center through hole and the special-shaped end supported above the center support column, wherein the twist head columnar body is installed with a limiting fastener at its position below the floating plate; a handle, which is pivotally installed on the twist head columnar body below the limiting fastener to enable the handle to rotate with the twist head in the handle operating space to realize the position switching of the special-shaped end between the locked position and the unlocked position, and to enable the handle to be respectively limited in one of the handle limiting spaces in the locked position and the unlocked position.

3. The double safety connection structure for the automatic polisher frame according to claim 2, wherein the twist head columnar body is provided with a gasket installation groove, in which a round nut stop gasket is installed, wherein the gasket installation groove is above the limiting fastener, and the limiting fastener is a round nut.

4. The double safety connection structure for the automatic polisher frame according to claim 3, wherein the special-shaped end has a cuboid locking part, which is across the oblong through hole when the special-shaped end is in the locked position, and is opposite to the oblong through hole when the special-shaped end is in the unlocked position.

5. The double safety connection structure for the automatic polisher frame according to claim 4, wherein the center support column of the floating plate is a rectangular column which can penetrate the oblong through hole, the cuboid locking part of the special-shaped end is crosswise intersected with the rectangular column to be staggered by 90° when the special-shaped end is in the locked position, and the cuboid locking part is aligned with the rectangular column when the special-shaped end is in the unlocked position.

6. The double safety connection structure for the automatic polisher frame according to claim 5, wherein the twist head columnar body has a round nut installation part below the gasket installation groove, the outer periphery of the round nut installation part is provided with an outer thread to cooperate with the limiting fastener, and the twist head columnar body has a handle bearing part below the round nut installation part, the diameter of the handle bearing part is relatively smaller than the diameter of the round nut installation part.

7. The double safety connection structure for the automatic polisher frame according to claim 6, wherein The handle has a handle mounting portion with both sides flat at one end thereof, the handle bearing portion of the knob columnar body is provided with a longitudinally extending handle operating slot corresponding to the handle mounting portion, and the handle mounting portion of the handle is mounted on the knob columnar body via a connecting bolt in the handle operating slot, so that the handle can drive the knob to rotate, and on the other hand, the handle mounting portion can pivot around the connecting bolt within the handle operating slot, so that the handle pivots around the connecting bolt to move out of or into the handle limiting space on the fixed plate.

8. The double safety connection structure for the automatic polisher frame according to any one of claims 2 to 7, characterized in that, The floating plate is adapted to be detachably mounted on the bottom surface of the top plate of the leg support via fastening bolts.

9. The double safety connection structure for the automatic polisher frame according to claim 8, wherein The pair of support columns of the fixed plate are spaced apart and provided with a pair of column center holes penetrating the pair of support columns, the fixed bolts are hexagonal cup head shoulder bolts, and the floating plate is correspondingly provided with a pair of bolt fixing holes, the fixed bolts are fastened in the bolt fixing holes from the bottom of the fixed plate and penetrating the column center holes.

10. The double safety connection structure for the automatic polisher frame according to claim 9, wherein The fixed plate is provided with a second center through hole corresponding to the first center through hole, the second center through hole is arranged to be penetrated by the knob columnar body, and the second center through hole is located between the pair of support columns.

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