A planing device for square boards used in wood product manufacturing

Abstract

This invention discloses a planing device for square boards used in wood product manufacturing, comprising a frame, with both ends of the frame bent vertically upwards to form vertical frames. A first horizontal frame and a second horizontal frame are mounted on the vertical frames, the first horizontal frame being parallel to the second horizontal frame. A planing mechanism is movably mounted between the first and second horizontal frames. A clamping device is slidably mounted on the first horizontal frame, located between the two planing mechanisms. A "∧"-shaped guide plate is provided inside the frame, located below the planing mechanism and the clamping device. This device uses a traditional planing method, resulting in larger chips, reduced air pollution, and higher planing efficiency.

Description

Technical Field

[0001] This invention relates to a planing device for square boards used in the production of wood products. Background Technology

[0002] Wood products, especially solid wood products, require the first step of cutting the boards, followed by fine processing, and then assembly.

[0003] Wood planing is one processing method. The existing technology mainly uses handheld planers. The handheld planer uses a motor to drive the cutter head to rotate at high speed and use the cutter head to complete the planing. In this processing method, the wood is sanded to form relatively fine dust, which creates a poor workshop environment. In addition, these flying wood dusts can be easily inhaled by workers, posing a safety hazard. They can also easily enter the equipment and be ignited, causing a fire.

[0004] Secondly, this hand-held planing method requires a slingshot; otherwise, it is difficult to plan the edges straight. It requires a certain level of skill and the planing efficiency is relatively low.

[0005] The most traditional method of planing edges manually is extremely inefficient and requires a higher level of skill from the carpenter.

[0006] Therefore, we designed a planing device for square boards used in wood product manufacturing that uses traditional planing methods to produce larger chips, reduce air pollution, and has higher planing efficiency. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a planing device for square boards used in wood product manufacturing that uses traditional planing methods to produce larger chips, reduce air pollution, and has higher planing efficiency.

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] A planing device for square boards used in wood product manufacturing includes a frame, with both ends of the frame bent vertically upwards to form vertical frames. A first horizontal frame and a second horizontal frame are mounted on the vertical frames, with the first horizontal frame parallel to the second horizontal frame. A planing mechanism is movably mounted between the first horizontal frame and the second horizontal frame. A clamping device is slidably mounted on the first horizontal frame, located between the two planing mechanisms. A "∧"-shaped guide plate is provided inside the frame, located below the planing mechanism and the clamping device.

[0010] Preferably, two first through slots are symmetrically arranged on the side of the first cross frame, and guide holes communicating with the first through slots are provided at the two end faces of the first cross frame. The edge planing mechanism slides laterally along the first through slots and is guided by the guide holes.

[0011] Preferably, the second crossbeam has symmetrically arranged second through slots corresponding to the first through slots on its side. A screw is rotatably fitted in the second through slot. One end of the screw extends to the outside of the second crossbeam and is fitted with a servo motor. The servo motor is fixed to the second crossbeam and connected to drive the screw. The edge-planing mechanism is fitted in the second through slot and is driven to slide by the screw.

[0012] Preferably, the planing mechanism includes a first slider, a second slider, a guide rod, a tool holder, and a double-edged cutter. The first slider is slidably fitted in the first through groove, and the second slider is slidably fitted in the second through groove. A first guide rod is provided on the outer side of the first slider. The first guide rod passes through the guide hole and slides axially along the guide hole. A threaded hole for engaging the screw is passed through the side of the second slider. The guide rod is installed between the first slider and the second slider. The tool holder is sleeved on the guide rod. The double-edged cutter is installed through the tool holder and corresponds to the clamping device.

[0013] Preferably, one end of the guide rod is inserted into the second slider, and a bearing is fitted between the guide rod and the second slider. An angle rotation motor is provided at the end of the first slider away from the guide rod, and a socket is provided on the output shaft of the angle rotation motor. The other end of the guide rod is inserted into the socket and fixed. Under the action of the angle rotation motor, the guide rod rotates, driving the tool holder to rotate by a preset angle.

[0014] Preferably, a positioning groove is provided on the outer wall of the guide rod, the positioning groove extending through the end away from the second slider, a positioning slider that matches the positioning groove is provided on the inner wall of the tool holder, and a locking bolt is screwed into the outer wall of the tool holder, the locking bolt locking with the guide rod after being screwed inward.

[0015] Preferably, two limiting sleeves are provided on the guide rod, and a first locking bolt is fitted between the limiting sleeve and the guide rod. A spring is provided on the guide rod, and the spring acts between the limiting sleeve and the tool holder. When the locking bolt is loosened, the tool holder slides along the guide rod and is reset by the spring's rebound.

[0016] Preferably, the clamping device includes a clamping seat, which is U-shaped and has a clamping opening. A second guide rod is provided on the outside of the clamping seat, passing through the first crossbeam. A linear bearing is fitted between the second guide rod and the first crossbeam, and the second guide rod slides along the linear bearing. An electric push rod is installed on the outside of the first crossbeam, and the movable end of the electric push rod passes through the first crossbeam and connects to the clamping seat. The clamping seat is flush with the edge-planing mechanism.

[0017] Preferably, a first electric push rod is installed at the bottom of the clamping base. The movable end of the first electric push rod is inserted upward into the clamping opening, and a lower clamping plate is rotatably fitted at this end. A clamping shaft device is provided at the upper end of the clamping base. A first angle rotary motor is installed at the upper end of the clamping shaft device. The output shaft of the first angle rotary motor passes through the clamping shaft device and is inserted into the clamping opening. An upper clamping plate is fixedly installed at this end. The planed wooden board is clamped between the lower clamping plate and the upper clamping plate. During the planing process, the output shaft of the first angle rotary motor is locked by the clamping shaft device.

[0018] Preferably, the clamping device includes a housing, with two miniature electric push rods facing each other on the outer wall of the housing. The two miniature electric push rods are located on the same diameter line of the housing and are perpendicular to the output shaft of the first angle rotary motor. The movable end of each miniature electric push rod is provided with a clamping plate. The clamping plate is arc-shaped, and a rubber clamping block is provided on the inner arc surface. A passive locking block is provided on the output shaft of the first angle rotary motor. The passive locking block is fixed to the output shaft of the first angle rotary motor. The outer wall of the passive locking block is circumferentially distributed with anti-slip grooves. After the miniature electric push rod is pushed out, the rubber clamping block holds the passive locking block, and the position of the passive locking block is fixed at this time.

[0019] The beneficial effects of this invention are:

[0020] This device uses traditional cutting tools for edge planing instead of rotary cutting. Therefore, the chips produced during edge planing are flaky and curled, which does not generate dust and is safer. The resulting surface has a higher degree of smoothness, making subsequent secondary polishing easier.

[0021] This device adopts a bidirectional planing mechanism, which can simultaneously plan both sides of the wood product. In one reciprocating motion, it can feed both sides and complete two planing operations, further improving the efficiency of the planing operation.

[0022] The clamping device in this apparatus can be rotated. When all four sides of a wooden product need to be planed, the position can be adjusted by rotating the wooden product, which facilitates the quick planing of the remaining two sides. This eliminates the need for a second clamping step, greatly speeds up the operation, and allows the traditional planing process to flourish. It is suitable for widespread use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram showing the connection between the first and second crossbeams;

[0026] Figure 3 This is a 3D view of the edge-planing mechanism;

[0027] Figure 4 This is a magnified view of point A;

[0028] Figure 5 A perspective view of the clamping device;

[0029] Figure 6 A schematic diagram of a clamping device for clamping wooden products;

[0030] Figure 7 This is a structural diagram of the clamping shaft device. Detailed Implementation

[0031] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0032] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0033] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] See Figure 1 The illustrated square board planing device for wood product manufacturing includes a frame 1. The two ends of the frame 1 are bent vertically upward to form vertical frames 2. A first horizontal frame 3 and a second horizontal frame 4 are installed through the vertical frames 2. The first horizontal frame 3 and the second horizontal frame 4 are parallel to each other. A planing mechanism 5 is movably installed between the first horizontal frame 3 and the second horizontal frame 4. A clamping device 6 is slidably installed through the first horizontal frame 3. The clamping device 6 is located between the two planing mechanisms 5. A "∧"-shaped guide plate 99 is provided inside the frame 1. The guide plate 99 is located below the planing mechanism 5 and the clamping device 6.

[0037] In this technical solution, the first crossbeam 3 and the second crossbeam 4, which are arranged in parallel, provide guidance and support.

[0038] There are two edge-planing mechanisms 5, which operate independently. Therefore, the position of one edge-planing mechanism 5 can be adjusted individually to make reasonable adjustments according to the required size of the wood board to be planed.

[0039] In the above technical solution, the clamping device 6 reciprocates along the first crossbeam 3, and contacts the planing mechanism 5 on both sides twice in one reciprocating movement, which greatly improves the planing efficiency.

[0040] Wood chips are discharged through the guide plate 99.

[0041] See Figure 2 As shown, two first through slots 31 are symmetrically arranged on the side of the first cross frame 3. Guide holes 32 that connect the first through slots 31 are provided at the two end faces of the first cross frame 3. The edge planing mechanism 5 slides laterally along the first through slots 31 and is guided by the guide holes 32.

[0042] See Figure 2 As shown, the second crossbeam 4 has a second through groove 41 symmetrically arranged on its side, corresponding to the first through groove 31. A screw is rotatably fitted in the second through groove 41. One end of the screw extends to the outside of the second crossbeam 4, and a servo motor 43 is fitted at this end. The servo motor 43 is fixed to the second crossbeam 4 and connected to drive the screw. The edge-planing mechanism 5 is fitted in the second through groove 41 and is driven to slide by the screw.

[0043] In the above technical solution, the planing mechanism 5 is supported by the first crossbeam 3 and the second crossbeam 4 to perform translation. The displacement is driven by a servo motor 43 and a screw, and the movement position is accurate.

[0044] The servo motor 43 is controlled by an independent servo system, which can preset the feed amount for each step so that the edge planing mechanism 5 can plan the edges gradually.

[0045] See Figure 2 and Figure 3 As shown, the planing mechanism 5 includes a first slider 51, a second slider 52, a guide rod 53, a tool holder 54, and a double-edged cutter 55. The first slider 51 is slidably fitted in the first through groove 31, and the second slider 52 is slidably fitted in the second through groove 41. A first guide rod 56 is provided on the outer side of the first slider 51. The first guide rod 56 passes through the guide hole 32 and slides along the axial direction of the guide hole 32. The side of the second slider 52 has a threaded hole 57 that engages with the screw 42. The guide rod 53 is installed between the first slider 51 and the second slider 52. The tool holder 54 is sleeved on the guide rod 53. The double-edged cutter 55 is installed through the tool holder 54 and corresponds to the clamping device 6.

[0046] In the above technical solution, the first slider 51 and the second slider 52 cooperate with the first crossbeam 3 and the second crossbeam 4 respectively to realize the sliding support of the guide rod 53. The second slider 52 is driven by the screw to move and complete the feeding of the bidirectional tool 55.

[0047] In a single movement of the clamping device 6, the second slider 52 moves by N screw pitches. The movement distance of one screw pitch is 0.1mm. That is to say, in one reciprocating motion of the clamping device 6, the second slider 52 needs to move by 2N screw pitches. Before the wooden product comes into contact with the double-edged cutter 55, the second slider 52 moves by N screw pitches under the drive of the screw, so that the wooden product comes into contact with one of the cutting edges of the double-edged cutter 55 during its movement, completing one edge planing. When the clamping device 6 resets, the second slider 52 moves by N screw pitches again under the drive of the screw, so that when the clamping device 6 resets, the other cutting edge of the double-edged cutter 55 comes into contact with the reset wooden product again. One reciprocating motion of the clamping device 6 completes two edge planings, doubling the edge planing efficiency.

[0048] N is preset by the servo motor, and N is 1~10.

[0049] See Figure 3 As shown, one end of the guide rod 53 is inserted into the second slider 52, and a bearing 510 is fitted between the guide rod 53 and the second slider 52. An angle rotation motor 511 is provided at the end of the first slider 51 away from the guide rod 53. The output shaft of the angle rotation motor 511 is provided with a socket 551. The other end of the guide rod 53 is inserted into the socket 551 and fixed. Under the action of the angle rotation motor 511, the guide rod 53 rotates, driving the tool holder 54 to rotate by a preset angle.

[0050] In the above technical solution, angled edge planing can be achieved. In actual operation, it is necessary to determine the degree of hardness of the wood product. During the edge planing process, it is important to determine whether the self-locking function of the angle rotary motor 511 can be locked. If the guide rod 53 is passively rotated when the double-edged cutter contacts the wood product, it indicates that the self-locking ability of the angle rotary motor 511 is insufficient. At this time, a bolt needs to be screwed into the top of the first slider 51. The bolt actively locks the output shaft of the angle rotary motor 511 to complete the reinforcement, so as to effectively complete the angled edge planing.

[0051] See Figure 4 As shown, a positioning groove 533 is provided on the outer wall of the guide rod 53, and the positioning groove 533 extends through the end away from the second slider 52. A positioning slider that cooperates with the positioning groove 533 is provided on the inner wall of the tool holder 54. A locking bolt 542 is screwed into the outer wall of the tool holder 54, and the locking bolt 542 locks with the guide rod 53 after being screwed inward.

[0052] In the above technical solution, the tool holder 54 is slidable, which facilitates position adjustment and subsequent maintenance.

[0053] See Figure 4As shown, two limiting sleeves 534 are provided on the guide rod 53. A first locking bolt 535 is fitted between the limiting sleeve 534 and the guide rod 53. A spring 536 is provided on the guide rod 53. The spring 536 acts between the limiting sleeve 534 and the tool holder 54. When the locking bolt 542 is loosened, the tool holder 54 slides along the guide rod 53 and is reset by the rebound of the spring 536.

[0054] In the above technical solution, the spring 536 provides the tool holder 54 with a space for elastic movement. When the double-edged tool comes into contact with the wooden product, the compression of the spring 536 allows the double-edged tool to move in a buffered manner, reducing the excessive speed of the wooden product and preventing chipping and breakage of the wooden product after impact with the double-edged tool.

[0055] See Figure 2 As shown, the clamping device 6 includes a clamping seat 61, which is U-shaped and has a clamping opening 6221. A second guide rod 62 is provided on the outside of the clamping seat 61. The second guide rod 62 passes through the first crossbeam 3. A linear bearing 63 is fitted between the second guide rod 62 and the first crossbeam 3. The second guide rod 62 slides along the linear bearing 63. An electric push rod 64 is installed on the outside of the first crossbeam 3. The movable end of the electric push rod 64 passes through the first crossbeam 3 and connects to the clamping seat 61. The clamping seat 61 is flush with the edge planing mechanism 5.

[0056] In the above technical solution, the operation of the electric push rod 64 drives the clamping seat 61 to move back and forth, and with the cooperation of the servo motors 43 on both sides, the planing of the wood products is completed.

[0057] See Figure 5 and Figure 6 As shown, a first electric push rod 610 is installed at the bottom of the clamping base 61. The movable end of the first electric push rod 610 is inserted upward into the clamping opening 6221. A lower clamping plate 611 is rotatably fitted at this end. A shaft clamping device 7 is provided at the upper end of the clamping base 61. A first angle rotary motor 612 is installed at the upper end of the shaft clamping device 7. The output shaft 661 of the first angle rotary motor 612 passes through the shaft clamping device 7 and is inserted into the clamping opening 6221. An upper clamping plate 613 is fixedly installed at this end. The planed wooden board is clamped between the lower clamping plate 611 and the upper clamping plate 613. During the planing process, the output shaft of the first angle rotary motor 612 is locked by the shaft clamping device 7.

[0058] In the above technical solution, a first electric push rod 610 is used to drive the lower clamping plate 611 to move. The clamping of the wooden product to be processed is completed by the cooperation of the lower clamping plate 611 and the upper clamping plate 613. In practical applications, the upper surface of the lower clamping plate 611 and the lower surface of the upper clamping plate 613 are processed to form anti-slip knurled patterns to increase the contact friction with the wooden product, so that the wooden product will not shift its position when it moves with the clamping seat 61.

[0059] The first angle rotary motor 612 itself has a locking function. In order to further improve the stability after angle rotation, an independently designed shaft clamping device 7 is added to clamp the output shaft 661 of the first angle rotary motor 612, so that it remains in place during the edge planing process and avoids rotation.

[0060] See Figure 7 As shown, the clamping device 7 includes a housing 71. Two miniature electric push rods 72 are arranged opposite each other on the outer wall of the housing 71. The two miniature electric push rods 72 are located on the same diameter line of the housing 71 and are perpendicular to the output shaft of the first angle rotary motor 612. A clamping plate 73 is provided at the movable end of each miniature electric push rod 72. The clamping plate 73 is arc-shaped, and a rubber clamping block 74 is provided on the inner arc surface. A passive locking block 75 is provided on the output shaft of the first angle rotary motor 612. The passive locking block 75 is fixed to the output shaft of the first angle rotary motor 612. Anti-slip grooves 76 are distributed annularly on the outer wall of the passive locking block 75. After the miniature electric push rod 72 is pushed out, the rubber clamping block 74 holds the passive locking block 75, thus fixing the position of the passive locking block 75.

[0061] In the above technical solution, the position of the output shaft 661 is locked by the output of the miniature electric push rods 72 on both sides and by the rubber clamp 74 locking the passive locking block 75.

[0062] When a 90-degree rotation of the wooden product is required, the miniature electric push rod 72 retracts and releases the clamping of the output shaft 661. At this time, the first angle rotary motor can rotate to actively adjust the placement angle of the wooden product through the upper clamping plate 613, thereby completing the planing of the remaining two sides. This eliminates the need for manual secondary clamping and speeds up the operation.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for planing the edges of square boards used in the production of wooden products, characterized in that: The utility model provides a double -sided edge planing device, including frame (1), the both ends of frame (1) are bent vertically upwards and form vertical frame (2), install first cross frame (3) and second cross frame (4) through vertical frame (2), first cross frame (3) with second cross frame (4) are parallel, and the movable mounting of edge planing mechanism (5) is installed between first cross frame (3) and second cross frame (4), and the clamping device (6) is slidably installed through first cross frame (3), and the clamping device (6) is located between the edge planing mechanism (5) of both sides, the inside of frame (1) is provided with the guide vane (99) of " A " shape, and the guide vane (99) is located below the edge planing mechanism (5) and the clamping device (6); Wherein, the side of first cross frame (3) is provided with two first through slots (31) symmetrically, and the guide hole (32) communicating the first through slot (31) is arranged at the both end surfaces of first cross frame (3), the edge planing mechanism (5) is slid along the transverse direction of first through slot (31), and is slid and guided through guide hole (32); Wherein, the side of second cross frame (4) is provided with the second through slot (41) corresponding the first through slot (31) symmetrically, the screw rod is rotatably fitted in the second through slot (41), one end of screw rod extends to the outside of second cross frame (4), and the end is fitted with servo motor (43), the servo motor (43) is fixed with second cross frame (4) and is connected to drive screw rod, the edge planing mechanism (5) is fitted in the second through slot (41) and is driven to slide by screw rod; Wherein, the edge planing mechanism (5) includes first slider (51), second slider (52), guide rod (53), tool holder (54) and double-edge cutter (55), the first slider (51) is slidably fitted in the first through slot (31), the second slider (52) is slidably fitted in the second through slot (41), the outside of first slider (51) is provided with first guide rod (56), first guide rod (56) passes through guide hole (32) and slides along the axial direction of guide hole (32), the side of second slider (52) is penetrated with the screw hole (57) of screw rod (42) fitting, the guide rod (53) is installed between first slider (51) and second slider (52), the tool holder (54) is sleeved on the guide rod (53), and the double-edge cutter (55) is installed through the tool holder (54) and corresponds the clamping device (6).

2. The device according to claim 1, characterized in that: One end of the guide rod (53) is inserted into the second slider (52). A bearing (510) is fitted between the guide rod (53) and the second slider (52). An angle rotation motor (511) is provided at the end of the first slider (51) away from the guide rod (53). A socket (551) is provided on the output shaft of the angle rotation motor (511). The other end of the guide rod (53) is inserted into the socket (551) and fixed. Under the action of the angle rotation motor (511), the guide rod (53) rotates, driving the tool holder (54) to rotate by a preset angle.

3. The device according to claim 2, characterized in that: A positioning groove (533) is provided on the outer wall of the guide rod (53), and the positioning groove (533) extends toward the end away from the second slider (52). A positioning slider that cooperates with the positioning groove (533) is provided on the inner wall of the tool holder (54). A locking bolt (542) is screwed into the outer wall of the tool holder (54), and the locking bolt (542) locks with the guide rod (53) after being screwed inward.

4. The device according to claim 3, characterized in that: Two limiting sleeves (534) are provided on the guide rod (53). A first locking bolt (535) is fitted between the limiting sleeve (534) and the guide rod (53). A spring (536) is provided on the guide rod (53). The spring (536) acts between the limiting sleeve (534) and the tool holder (54). When the locking bolt (542) is loosened, the tool holder (54) slides along the guide rod (53) and is reset by the rebound of the spring (536).

5. The device according to claim 1, characterized in that: The clamping device (6) includes a clamping seat (61), which is U-shaped and has a clamping opening (6221). A second guide rod (62) is provided on the outside of the clamping seat (61). The second guide rod (62) passes through the first crossbeam (3). A linear bearing (63) is fitted between the second guide rod (62) and the first crossbeam (3). The second guide rod (62) slides along the linear bearing (63). An electric push rod (64) is installed on the outside of the first crossbeam (3). The movable end of the electric push rod (64) passes through the first crossbeam (3) and connects to the clamping seat (61). The clamping seat (61) is flush with the edge planing mechanism (5).

6. The device according to claim 5, characterized in that: First electric push rod (610) is installed in bottom of clamping seat (61), movable end of first electric push rod (610) is inserted to clamping mouth (6221) upwards, and lower clamp plate (611) is rotationally fitted at the end, upper end of clamping shaft device (7) is provided with, first angle rotary motor (612) is installed in upper end of clamping shaft device (7), output shaft (661) of first angle rotary motor (612) is inserted to clamping mouth (6221) after passing through clamping shaft device (7), and upper clamp plate (613) is fixedly installed in the insertion end of first angle rotary motor, the wood board to be edged is clamped between lower clamp plate (611) and upper clamp plate (613), and the output shaft of first angle rotary motor (612) is locked by clamping shaft device (7) during edging.

7. The device according to claim 6, characterized in that: Clamping shaft device (7) includes shell (71), and micro electric push rod (72) is provided at the outer wall of shell (71) in opposition, two micro electric push rods (72) are on the same diameter line of shell (71), and are perpendicular to the output shaft of first angle rotary motor (612), and the movable end of micro electric push rod (72) is provided with clamping shaft plate (73), clamping shaft plate (73) is arc-shaped, rubber clamp block (74) is provided at inner arc surface, passive locking block (75) is provided on the output shaft of first angle rotary motor (612), passive locking block (75) is fixed with the output shaft of first angle rotary motor (612), and anti-skid groove (76) is annularly distributed at the outer wall of passive locking block (75), after the ejection of micro electric push rod (72), rubber clamp block (74) embraces passive locking block (75), and the position of passive locking block (75) is fixed at this time.

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