Reamer for installing photovoltaic panel in sponge city

Abstract

The utility model discloses a reamer for installing a photovoltaic panel in a sponge city, which comprises a cutter handle rod, a disc is fixedly connected to the front side of the cutter handle rod through a fixing rod, a spiral centralizer is arranged on the outer side of the cutter handle rod, and the reamer further comprises a reaming and compacting assembly. The reamer is arranged between the disc and the cutter handle rod and used for assisting in reaming and compacting a steel reinforcement cage pouring hole. According to the reamer for installing the photovoltaic panel in the sponge city, through mutual cooperation of the reaming and compacting assembly, the transmission assembly, the pushing piece and the linkage piece, the reaming and compacting operation of a steel reinforcement cage pouring hole is completed, and in the reaming and compacting process, through transmission, the hole can be compacted, and the hole can be compacted. And soil accumulated at the bottoms of the reinforcement cage pouring holes is synchronously extruded, pushed and compressed to the bottoms and the side walls of the reinforcement cage pouring holes, so that resistance interference to expansion of the reinforcement cage is avoided, effective expansion of the reinforcement cage is guaranteed, and the pulling resistance to the mounting frame after the mounting frame and the reinforcement cage are poured is further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil layer reaming technology field, specifically is a reamer for sponge city photovoltaic panel installation. BACKGROUND

[0002] The sponge city photovoltaic panel is the innovative facility that will photovoltaic power generation technology and sponge city concept deeply blend, has the dual function of clean energy production and rainwater management, through structural design optimization, make it become city " will breathe the power generation unit", the sponge city photovoltaic panel needs to pre-bury installation frame during installation, during installation frame pre-bury installation, to guarantee the installation strength of installation frame and to avoid the influence of pre-bury depth of installation frame to the underground river of ground bottom, the pre-bury hole of installation frame is arranged in the inclined state, in addition, to aspect subsequent stable pouring, the pre-bury hole needs to set up the steel reinforcement cage pouring hole with larger aperture, after setting up the steel reinforcement cage pouring hole, to guarantee the aperture size, reaming and compacting are carried out again through the reamer, the cavity wall in the interior is compacted, and subsequent more stable pouring is facilitated, and during the reaming and compacting, the soil falling during the reaming and compacting is accumulated at the bottom of the steel reinforcement cage pouring hole due to the inclined state of the steel reinforcement cage pouring hole and the pre-bury hole, the accumulated soil occupies the space at the bottom of the hole, and the expansion of the steel reinforcement cage is interfered, so that the steel reinforcement cage is not expanded in place in the steel reinforcement cage pouring hole, and the pullout resistance of the installation frame after pouring of the steel reinforcement cage is reduced.

[0003] Therefore, a reamer for sponge city photovoltaic panel installation is needed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a reamer for sponge city photovoltaic panel installation to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a reamer for sponge city photovoltaic panel installation, including the handle rod, the front side of the handle rod is fixedly connected with the disc through the fixed rod, the outer side of the handle rod is provided with the spiral righting device, further including:

[0006] The reaming and compacting assembly is arranged between the disc and the handle rod and is used for assisting the reaming and compacting of the steel reinforcement cage pouring hole;

[0007] The transmission assembly is arranged on the reaming and compacting assembly and is used for transmission during the reaming and compacting;

[0008] In addition, the pusher for extruding and pushing the soil existing at the bottom of the steel reinforcement cage pouring hole in the axial direction during the reaming and compacting is arranged on the front side of the reaming and compacting assembly, and the linkage for synchronously pushing the pusher during transmission is arranged on the transmission assembly.

[0009] The reaming and compacting assembly is provided with multiple groups, and the multiple groups of reaming and compacting assemblies are arranged in a ring array state, the outer side of the fixing rod is sleeved with a ring seat, and the multiple groups of reaming and compacting assemblies are arranged between the ring seat and the disc.

[0010] The reaming and compacting assembly comprises a mounting column fixed to one side of the disc close to the ring seat, a mounting plate arranged between the mounting column and the ring seat, and an arc-shaped supporting plate for supporting the inner wall of the pouring hole of the reinforcement cage, which is fixedly connected to the mounting plate through two groups of symmetrically arranged fixing frames, a transmission assembly arranged between the ring seat, the mounting column and the mounting plate, and an extension assembly arranged on the tool shank rod for driving the extension and retraction of the ring seat.

[0011] The transmission assembly comprises two groups of transmission rods, which are cross-shaped and rotatably connected through a rotating pin, one end of each of the two groups of transmission rods is rotatably connected to the ring seat and the mounting plate through a pin shaft, and the other end of each of the two groups of transmission rods is rotatably connected to a sliding seat through a pin shaft, and the two groups of sliding seats are slidingly connected to the mounting column and the mounting plate, respectively.

[0012] The pushing member is an arc-shaped pushing plate arranged on the front side of the arc-shaped supporting plate, and the fixing frame is provided with a connecting assembly for assisting the connection of the arc-shaped pushing plate.

[0013] The linkage member is a push rod slidingly connected to the disc, and one end of the push rod is fixed to the ring seat.

[0014] The connecting assembly comprises multiple groups of T-shaped rods slidingly connected to the fixing frame, one end of each of the T-shaped rods is fixed to the arc-shaped pushing plate, the outer side of each of the T-shaped rods is sleeved with a spring, and the two ends of the spring are arranged in abutment with the end portions of the T-shaped rods and the fixing frame, respectively.

[0015] The extension assembly comprises an oil cylinder mounted to the outer side of the tool shank rod, and a connecting rod is mounted to the output end of the oil cylinder, and one end of the connecting rod is fixed to the ring seat.

[0016] The other end of the push rod is rotatably connected to a ball through a spherical groove for abutting against the arc-shaped pushing plate.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The utility model discloses a sponge city photovoltaic panel mounting is with reamer, through the cooperation of reaming compact component, transmission assembly and pusher and linkage, completes the reaming compact operation to steel reinforcement cage pouring hole, in the process of reaming compact, through transmission, the soil that is accumulated in the bottom of steel reinforcement cage pouring hole is extruded and compressed in the bottom and lateral wall of steel reinforcement cage pouring hole simultaneously, avoids the expansion of steel reinforcement cage and produces resistance interference, guarantees the effective expansion of steel reinforcement cage, further guarantees the pullout resistance of mounting frame to steel reinforcement cage pours later to mounting frame. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is whole appearance structure schematic diagram of the utility model;

[0020] Figure 2 It is reaming compact component structure schematic diagram of the utility model;

[0021] Figure 3 It is transmission assembly structure schematic diagram of the utility model;

[0022] Figure 4 It is arc support plate and arc push plate movement direction schematic diagram in the transmission process of transmission assembly of the utility model;

[0023] Figure 5 It is push rod structure schematic diagram of the utility model;

[0024] Figure 6 It is reamer working process schematic diagram of the utility model;

[0025] Figure 7 It is steel reinforcement cage in pouring hole after placing and not expanding state schematic diagram;

[0026] Figure 8 It is steel reinforcement cage in pouring hole after placing and expanding state schematic diagram;

[0027] Figure 9 It is reamer on drilling machine installation and use state schematic diagram of the utility model.

[0028] In the drawing: 101 - handle rod;102 - fixed rod;103 - disc;104 - spiral centralizer;201 - annular seat;202 - mounting column;203 - mounting plate;204 - arc support plate;205 - fixed frame;301 - transmission rod;302 - rotating pin;303 - sliding seat;4 - arc push plate;501 - T type rod;502 - spring;6 - push rod;701 - oil cylinder;702 - connecting rod;8 - ball;901 - pre-buried hole;902 - steel reinforcement cage pouring hole;903 - mounting frame. DETAILED DESCRIPTION

[0029] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0030] Please refer to Figures 1-9 The utility model provides a sponge city photovoltaic panel installation is used reamer, including handle bar 101, the front side of handle bar 101 is fixedly connected with disc 103 through fixed link 102, the outside of handle bar 101 is provided with helical centralizer 104, one end of handle bar 101 is detachably installed at the front end of the drill rod of the drilling machine, in the process of working, the driving of the drill rod through the drilling machine drives handle bar 101 to rotate and adjust, the drilling machine and the drill rod are conventional technical components in the technical field of the application, and the working principle and the operation mode will not be described in detail here.

[0031] It should be noted here that: the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 are drilled in sequence on the foundation by the drilling equipment, the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 are concentric and arranged in an inclined state, after drilling is completed, the soil deposited inside the steel reinforcement cage pouring hole 902 and the pre-buried hole 901 is extracted and collected with the external pressure pump, after hole cleaning is completed, the inner wall of the steel reinforcement cage pouring hole 902 is reamed and compacted by the reamer, the inner cavity wall is compacted, which is convenient for subsequent more stable pouring and ensures the hole diameter size of the steel reinforcement cage pouring hole 902, after reaming and compacting are completed, the mounting frame 903 is put into the inside of the steel reinforcement cage pouring hole 902 and is subjected to expansion treatment, after expansion is completed, the mounting frame 903 is put into the inside of the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 and is subjected to pouring treatment, and the pre-buried installation of the mounting frame 903 is completed.

[0032] It should be noted here that: the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 are drilled, the extracted and collected soil is accumulated, and the righting and positioning operation of the helical centralizer 104 are conventional technical means in the technical field of the application, and the working principle and the operation steps are known technology and will not be described in detail here.

[0033] In addition, it should be particularly noted here that the steel reinforcement cage used in the application is a variable-diameter steel reinforcement cage, which can be expanded in diameter after being put into the inside of the steel reinforcement cage pouring hole 902 (see Figure 7 and Figure 8 ), and the expansion treatment ensures the pulling resistance after pouring, and the variable-diameter steel reinforcement cage is a conventional pouring auxiliary component, and the working principle and the operation steps are known technology and will not be described in detail here.

[0034] Also included are:

[0035] A reaming and compacting assembly is arranged between the disc 103 and the shank rod 101 to assist in reaming and compacting the reinforcement cage pouring hole 902;

[0036] A transmission assembly is arranged on the reaming and compacting assembly for transmission during the reaming and compacting process;

[0037] In addition, a pushing member is arranged on the front side of the reaming and compacting assembly for pushing the soil existing at the bottom of the reinforcement cage pouring hole 902 in the axial direction during the reaming and compacting process, and the transmission assembly is provided with a linkage member for synchronously pushing the pushing member during transmission;

[0038] It should be noted that through the cooperation of the reaming and compacting assembly, the transmission assembly, and the pushing member and the linkage member, the reaming operation of the reinforcement cage pouring hole 902 is completed, and during the reaming and compacting process, the soil accumulated at the bottom of the reinforcement cage pouring hole 902 is synchronously extruded and pushed and compressed at the bottom and the side wall of the reinforcement cage pouring hole 902 through transmission, avoiding interference with the expansion of the reinforcement cage, ensuring the effective expansion of the reinforcement cage, and further ensuring the uplift resistance of the mounting frame 903 after pouring.

[0039] The reaming and compacting assembly is provided in multiple groups, and the multiple groups of reaming and compacting assemblies are arranged in a ring array state, the outer side of the fixed rod 102 is sleeved with a ring seat 201, and the multiple groups of reaming and compacting assemblies are arranged between the ring seat 201 and the disc 103;

[0040] It should be noted that through the multiple groups of reaming and compacting assemblies, the efficiency and effect of support are ensured.

[0041] The reaming and compacting assembly includes a mounting column 202 fixed to one side of the disc 103 close to the ring seat 201, an installation plate 203 is arranged between the mounting column 202 and the ring seat 201, two groups of fixed frames 205 symmetrically arranged on the installation plate 203 are fixedly connected with arc-shaped support plates 204 for abutting and supporting the inner wall of the reinforcement cage pouring hole 902, the transmission assembly is arranged between the ring seat 201, the mounting column 202, and the installation plate 203, and the shank rod 101 is provided with a telescopic assembly for telescopic driving of the ring seat 201;

[0042] It should be noted that through transmission, the arc-shaped support plates 204 are driven to move towards and abut against the inner wall of the reinforcement cage pouring hole 902, and through abutting and extruding, the abutting inner wall of the reinforcement cage pouring hole 902 is reamed and compacted, after the reaming and compacting is completed, the arc-shaped support plates 204 are driven to reset through transmission, and the extension and retraction driving cooperation of each group of arc-shaped support plates 204 is repeated to adjust the direction of the entire reamer, realizing the reaming and compacting operation at different positions of the inner wall of the reinforcement cage pouring hole 902.

[0043] The transmission assembly comprises two groups of transmission rods 301, which are rotatably connected through a rotating pin 302 and arranged in a cross shape. One end of each group of transmission rods 301 is rotatably connected to the annular seat 201 and the mounting plate 203 through a pin shaft, respectively. The other end of each group of transmission rods 301 is rotatably connected to a sliding seat 303 through a pin shaft. The two groups of sliding seats 303 are slidably connected to the mounting column 202 and the mounting plate 203, respectively.

[0044] It should be noted that the annular seat 201 is forced to perform a telescopic movement through transmission. During the movement of the annular seat 201, the mounting plate 203 is pushed to move closer to or away from the annular seat 201 through the interaction of the two groups of transmission rods 301, the rotating pin 302, and the sliding seat 303.

[0045] The pushing member is an arc-shaped push plate 4, which is arranged on the front side of the arc-shaped support plate 204. The fixed frame 205 is provided with a connecting assembly for assisting the connection of the arc-shaped push plate 4.

[0046] It should be noted that the arc-shaped push plate 4 performs radial movement and axial movement at the same time through transmission. Through the axial movement of the arc-shaped push plate 4, the soil accumulated at the bottom of the reinforcement cage pouring hole 902 is extruded and compressed at the bottom of the reinforcement cage pouring hole 902.

[0047] The linkage member is a push rod 6 slidably connected to the disc 103. One end of the push rod 6 is fixed to the annular seat 201.

[0048] It should be noted that during the movement of the annular seat 201, the arc-shaped support plate 204 moves towards the inner wall of the reinforcement cage pouring hole 902. Through the connecting action of each group of T-shaped rods 501, the arc-shaped push plate 4 is driven to perform radial movement synchronously. During the movement of the annular seat 201, the push rod 6 moves synchronously. During the movement of the push rod 6, the front side of the push rod 6 is in contact with one side of the arc-shaped push plate 4. Through the extrusion of the contact, the arc-shaped push plate 4 performs radial movement and axial movement at the same time.

[0049] The connecting assembly comprises a plurality of groups of T-shaped rods 501 slidably connected to the fixed frame 205. One end of each T-shaped rod 501 is fixed to the arc-shaped push plate 4. A spring 502 is arranged outside the T-shaped rod 501. The two ends of the spring 502 are in contact with the end of the T-shaped rod 501 and the fixed frame 205, respectively.

[0050] It should be noted that the plurality of groups of T-shaped rods 501 facilitate the telescopic connection of the arc-shaped push plate 4. The spring 502 facilitates the resetting of the arc-shaped push plate 4 after movement.

[0051] The telescopic assembly comprises an oil cylinder 701 mounted outside the shank rod 101, an output end of the oil cylinder 701 is provided with a connecting rod 702, one end of the connecting rod 702 is fixed with the annular seat 201;

[0052] It should be noted that the annular seat 201 is assisted to perform telescopic movement through the oil cylinder 701 and the connecting rod 702.

[0053] It should be noted that the drilling machine is provided with a hydraulic system for controlling the oil cylinder 701, wherein the hydraulic system of the drilling machine is a conventional technical component, and the working principle and the connection and control mode of the oil cylinder 701 are conventional technical means, which will not be described in detail.

[0054] The other end of the push rod 6 is rotatably connected with a ball 8 for abutting against the arc-shaped push plate 4 through a spherical groove;

[0055] It should be noted that in the process of axially pushing the arc-shaped push plate 4 by using the push rod 6, the movement effect of the arc-shaped push plate 4 is improved through the rotating action of the ball 8 in the spherical groove and the abutting pushing action of the ball 8 and the arc-shaped push plate 4.

[0056] Working principle: in the process of installing the sponge city photovoltaic panel, the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 are sequentially drilled on the foundation by the drilling equipment, the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 are concentrically arranged in an inclined state (see Figure 6 and Figure 7 ), after the drilling is completed, the soil deposited in the steel reinforcement cage pouring hole 902 and the pre-buried hole 901 is extracted and collected by cooperating with the external extraction pump, after the hole cleaning is completed, the inner wall of the steel reinforcement cage pouring hole 902 is expanded and compacted by the hole expander, the inner cavity wall is compacted, which is convenient for subsequent more stable pouring and ensures the hole diameter size of the steel reinforcement cage pouring hole 902, after the expansion and compaction are completed, the steel reinforcement cage is put into the inside of the steel reinforcement cage pouring hole 902 and is expanded (see Figure 7 and Figure 8 ), after the expansion is completed, the mounting frame 903 is put into the inside of the pre-buried hole 901 and the steel reinforcement cage pouring hole 902 and is poured to complete the pre-buried installation of the mounting frame 903.

[0057] In the process of using the reamer to ream and compact the reinforcement cage pouring hole 902, the disc 103 at the front end of the fixed rod 102 is pushed into the inside of the reinforcement cage pouring hole 902 through the shank rod 101. In the process of pushing in, the reamer being pushed in is righted and positioned through the interaction between the helical righting device 104 on the shank rod 101 and the inner wall of the pre-buried hole 901. After the shank rod 101 is pushed in, the annular seat 201 is moved towards the disc 103 through the oil cylinder 701 and the connecting rod 702. In the process of movement of the annular seat 201, the mounting plate 203 is moved away from the annular seat 201 through the interaction between the two groups of transmission rods 301 and the rotating pins 302. In the process of movement, the arc-shaped supporting plate 204 is moved towards the inner wall of the reinforcement cage pouring hole 902 and abuts against it through the connecting action of the fixing frame 205. The abutting and extruding action expands and compacts the side wall of the reinforcement cage pouring hole 902 that abuts against it and compacts the soil existing in the movement path of the arc-shaped supporting plate 204 on the side wall of the reinforcement cage pouring hole 902. After the reaming and compaction are completed, the arc-shaped supporting plate 204 is reset through transmission and driving. The extension and retraction driving cooperation of each group of arc-shaped supporting plates 204 adjusts the direction of the reamer (in the process of direction adjustment, the shank rod 101 is adjusted in rotation through the driving of the drill to the drill rod, see Figure 9 ). The reaming and compaction operation is implemented on different positions of the inner wall of the reinforcement cage pouring hole 902, and the reaming operation of the reinforcement cage pouring hole 902 is further completed.

[0058] In the process of reaming and compacting, the reinforcement cage pouring hole 902 is in an inclined state, so that the soil falling in the process of reaming and compacting is accumulated at the bottom of the reinforcement cage pouring hole 902, as shown in Figure 6 . In the process of movement of the annular seat 201, the arc-shaped push plate 4 is moved radially synchronously through the connecting action of each group of T-shaped rods 501. In the process of movement of the annular seat 201, the push rod 6 is moved synchronously. In the process of movement of the push rod 6, the ball 8 at the front side of the push rod 6 abuts against one side of the arc-shaped push plate 4. The abutting and extruding action makes the arc-shaped push plate 4 move axially while moving radially (see the transmission direction diagram in Figure 4 ). The axial movement of the arc-shaped push plate 4 extrudes and compresses the soil accumulated at the bottom of the reinforcement cage pouring hole 902 at the bottom of the reinforcement cage pouring hole 902, avoids the interference of the expansion of the reinforcement cage, ensures the effective expansion of the reinforcement cage, and further ensures the uplift resistance of the mounting frame 903 after the reinforcement cage is poured.

[0059] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A reamer for sponge city photovoltaic panel installation, comprising: a shank rod (101), the front side of the shank rod (101) is fixedly connected with a disc (103) through a fixed rod (102), and the outer side of the shank rod (101) is provided with a spiral centralizer (104); characterized in that it further comprises: a reaming and compacting assembly arranged between the disc (103) and the shank rod (101) for assisting in reaming and compacting the steel cage pouring hole (902); a transmission assembly arranged on the reaming and compacting assembly for transmission during the reaming and compacting process; and a pusher arranged on the front side of the reaming and compacting assembly for pushing the soil existing at the bottom of the steel cage pouring hole (902) in the axial direction during the reaming and compacting process, the transmission assembly is provided with a linkage for synchronously pushing the pusher during transmission.

2. The reamer for installing the sponge city photovoltaic panel according to claim 1, characterized in that: The reaming and compacting assembly is provided with multiple groups, and the multiple groups of reaming and compacting assemblies are arranged in a ring array state, the outer side of the fixed rod (102) is sleeved with a ring seat (201), and the multiple groups of reaming and compacting assemblies are arranged between the ring seat (201) and the disc (103).

3. The reamer for installing the sponge city photovoltaic panel according to claim 2, characterized in that: The reaming and compacting assembly comprises a mounting column (202) fixed to one side of the disc (103) close to the ring seat (201), a mounting plate (203) is arranged between the mounting column (202) and the ring seat (201), the mounting plate (203) is fixedly connected with an arc-shaped support plate (204) for abutting and supporting the inner wall of the steel cage pouring hole (902) through two groups of symmetrically arranged fixing frames (205), the transmission assembly is arranged between the ring seat (201), the mounting column (202) and the mounting plate (203), and the shank rod (101) is provided with an extension assembly for driving the extension of the ring seat (201).

4. The reamer for installing the sponge city photovoltaic panel according to claim 3, characterized in that: The transmission assembly comprises two groups of transmission rods (301), the two groups of transmission rods (301) are rotatably connected through a rotating pin (302) and arranged in a cross shape, one end of each of the two groups of transmission rods (301) is rotatably connected with the ring seat (201) and the mounting plate (203) through a pin shaft, and the other end of each of the two groups of transmission rods (301) is rotatably connected with a sliding seat (303) through a pin shaft, and the two groups of sliding seats (303) are slidingly connected to the mounting column (202) and the mounting plate (203) respectively.

5. The reamer for installing the sponge city photovoltaic panel according to claim 4, characterized in that: The pusher is an arc-shaped push plate (4), the arc-shaped push plate (4) is arranged on the front side of the arc-shaped support plate (204), and the fixing frame (205) is provided with a connecting assembly for assisting in connecting the arc-shaped push plate (4).

6. The reamer for installing the sponge city photovoltaic panel according to claim 5, characterized in that: The linkage is a push rod (6) slidingly connected to the disc (103), one end of the push rod (6) is fixed to the ring seat (201).

7. The reamer for installing the sponge city photovoltaic panel according to claim 5, characterized in that: The connecting assembly comprises multiple groups of T-shaped rods (501) slidingly connected to the fixing frame (205), one end of each of the T-shaped rods (501) is fixed to the arc-shaped push plate (4), the outer side of each of the T-shaped rods (501) is sleeved with a spring (502), and both ends of the spring (502) are abuttingly arranged with the end of the T-shaped rod (501) and the fixing frame (205) respectively.

8. The reamer for installing the sponge city photovoltaic panel according to claim 3, characterized in that: The telescopic assembly comprises an oil cylinder (701) mounted outside the shank rod (101), and an output end of the oil cylinder (701) is provided with a connecting rod (702), one end of the connecting rod (702) is fixed with the annular seat (201).

9. The reamer for installing the sponge city photovoltaic panel according to claim 6, characterized in that: The other end of the push rod (6) is rotationally connected with a ball (8) for abutting against the arc-shaped push plate (4) through a spherical groove.

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