A cold elbow pushing equipment

Abstract

The present invention provides an elbow cold pushing device, which belongs to the field of pipeline processing technology, and includes an equipment body, an upper mold and a lower mold; the upper mold is connected to the mold driving part of the equipment body, and the upper mold and the lower mold are both provided with an arc guide groove; the equipment body is provided with a pushing driving part; the elbow cold pushing device also includes a core rod, a rotating structure and a demolding structure; the core rod is arranged in the arc guide groove, and a gap is provided between the core rod and the arc guide groove; the rotating end of the rotating structure is connected to one end of the core rod; the demolding structure is arranged on one side of the rotating structure; the demolding structure is provided with a pushing component, and when the core rod rotates to a vertical state, the pushing component contacts the bottom end of the pipe fitting on the core rod; wherein the demolding structure has a rotating shaft coaxially arranged with the core rod; through the above-mentioned arrangement of the present application, the operator does not need to take the pipe fitting from between the upper mold and the lower mold, which can reduce safety hazards; the pipe fitting is pushed out of the core rod by the demolding structure, which can reduce the difficulty of manual material removal.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline processing, and in particular relates to an elbow cold pushing device. Background Art

[0002] An elbow is a connecting pipe fitting in a pipeline, which is used to connect two pipes so that the pipes form a certain angle; in the prior art, a Chinese invention patent with application number CN202110860404.8 discloses a cold push forming process for thin-walled elbows, comprising the following steps: S1, material preparation and positioning; S2, mold closing; S3, push forming; S4, mold opening and material taking; the thin-walled pipe fitting is pushed into the mold cavity by a pushing mechanism to form a preliminary positioning of the thin-walled pipe fitting, and the accuracy of the upper and lower molds when closing the mold can be improved by setting the guide mechanism.

[0003] In the cold push forming process, after the pipe is pushed, the upper mold moves upward to facilitate the operator to take out the pipe on the lower mold. The above material removal process requires the operator to put his hand between the upper mold and the lower mold, which poses a safety hazard. Summary of the invention

[0004] The embodiment of the present invention provides an elbow cold pushing device, which aims to solve the technical problem in the prior art that an operator needs to put his hand between an upper mold and a lower mold when taking materials, which poses a safety hazard.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] Provided is an elbow cold pushing device, comprising an equipment body, an upper mold and a lower mold; the upper mold is connected to a mold clamping driving member of the equipment body, the upper mold and the lower mold are both provided with an arc guide groove, one end of the arc guide groove extends in a horizontal direction; the equipment body is provided with a pushing driving member for pushing a pipe fitting at the position of a horizontal extension member of the arc guide groove; the elbow cold pushing device also includes:

[0007] The mandrel is an arc-shaped structure; the mandrel is arranged in the arc-shaped guide groove, and there is a gap between the mandrel and the arc-shaped guide groove so that the pipe fitting can be inserted into the mandrel;

[0008] A rotating structure is arranged on one side of the equipment body at the lower mold; the rotating end of the rotating structure is connected to one end of the mandrel; wherein, after the pipe is pushed, the mandrel can be rotated out of the lower mold driven by the rotating structure;

[0009] A demoulding structure is arranged on one side of the rotating structure; the demoulding structure is provided with a pushing component, and when the core rod is rotated to a vertical state, the pushing component contacts the bottom end of the pipe fitting on the core rod; wherein the demoulding structure has a rotating shaft coaxially arranged with the core rod, so that the pushing component can push out the pipe fitting on the core rod.

[0010] In a possible implementation, the rotating structure includes:

[0011] A frame body is arranged on one side of the equipment body at the lower mold;

[0012] A first rotating shaft is rotatably disposed on the frame; an extension component is provided on the outer peripheral wall of the first rotating shaft, and the extension component is connected to the outer end of the core rod;

[0013] A driving member is arranged on the frame; a driving end of the driving member is connected to one end of the first rotating shaft to drive the first rotating shaft to rotate.

[0014] In a possible implementation, a maintenance component is detachably connected to the outer peripheral wall of the first rotating shaft, and the maintenance component is fixedly connected to the extension component.

[0015] In a possible implementation, the maintenance component includes:

[0016] A first clamping portion, one side of which has a semicircular groove for plugging and matching with the first rotating shaft, and the other side of which is fixedly connected to the extension component;

[0017] The anti-rotation part is connected in the semicircular groove of the first clamping part; the first rotating shaft has an anti-rotation groove which is plugged and matched with the anti-rotation part;

[0018] Among them, the first clamping part has a first fixing groove which is at a preset angle with the anti-rotation groove, and the first rotating shaft has a second fixing groove which is aligned with the first fixing groove; the maintenance component also includes a positioning pin which is plugged into and cooperates with the first fixing groove and the second fixing groove.

[0019] In a possible implementation, the second fixing groove is connected to the anti-rotation groove, the anti-rotation portion has a push groove connected to the second fixing groove, and one side of the push groove is connected to the side wall of the first clamping portion;

[0020] When the first clamping portion is disassembled, the push groove is connected to a pressure source to push the positioning pin out of the first fixing groove.

[0021] In a possible implementation, the first clamping portion has a connecting rope, the other end of which is connected to the outer end of the positioning pin; the length of the connecting rope is greater than the length of the positioning pin, so that the positioning slot can slide out of the first fixing slot.

[0022] In a possible implementation manner, a matching portion is fixedly provided on the first rotating shaft, and the matching portion can contact the bottom of the first clamping portion.

[0023] In a possible implementation, the demoulding structure includes:

[0024] A frame body is arranged on one side of the equipment body at the lower mold;

[0025] A pushing component, one end of which is hinged on the frame; the hinge axis of the pushing component is coaxially arranged with the mandrel when the mandrel is arranged vertically, and one side of the pushing component has a support member for contacting the bottom of the pipe;

[0026] The driving structure is arranged on the frame; the driving end of the driving structure is connected with the pushing component so that the pushing component rotates around the hinge shaft.

[0027] In a possible implementation manner, one end of the support member facing away from the pushing member has a chamfer, and when the mandrel is rotated to a vertical state, the support member can contact the bottom of the pipe.

[0028] In a possible implementation, the driving structure includes a hydraulic cylinder, a piston rod end of the hydraulic cylinder is hinged to a free end of the pushing component; a cylinder body of the hydraulic cylinder is hinged to the frame body;

[0029] Wherein, within the curvature range of the core rod, the hydraulic cylinder can drive the pushing component to rotate.

[0030] Compared with the prior art, the elbow cold pushing equipment provided by the present invention has the following advantages: when pushing a pipe fitting into an elbow, the operator places the pipe fitting to the extended position of the arc guide groove of the lower mold, and then the upper mold is buckled on the lower mold under the drive of the mold closing drive member; the push drive member pushes the pipe fitting in the arc guide groove, so that the pipe fitting moves along the arc guide groove and is finally sleeved on the core rod; after the push is completed, the pipe fitting forms an elbow, and the pipe fitting is sleeved on the core rod; the upper mold is reset upward, and the rotating structure can rotate the pipe fitting out of the lower mold; after rotating ninety degrees, the push component on the demoulding structure can push the pipe fitting along the arc direction of the core rod, and finally make the pipe fitting separate from the core rod. Through the above-mentioned setting of the present application, the operator does not need to take the pipe fitting from between the upper mold and the lower mold, which can reduce safety hazards; the difficulty of manual material removal can be reduced by pushing the pipe fitting out of the core rod through the demoulding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a state in which a pipe fitting of an elbow cold pushing device provided by an embodiment of the present invention is pushed to the position of an arc-shaped guide groove;

[0032] Figure 2 A schematic diagram of a state where no pipe fittings are placed on an elbow cold pushing device provided by an embodiment of the present invention;

[0033] Figure 3 for Figure 2 The enlarged schematic diagram of the middle A part;

[0034] Figure 4 A schematic diagram of a demoulding structure of an elbow cold pushing device provided in an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of a mandrel portion of an elbow cold pushing device provided in an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of maintenance components of an elbow cold pushing equipment provided by an embodiment of the present invention;

[0037] Figure 7 for Figure 6 The enlarged schematic diagram of the middle B part;

[0038] Figure 8 A cross-sectional view of a first clamping portion of an elbow cold pushing device provided in an embodiment of the present invention;

[0039] Fig. 9 for Figure 8 The enlarged schematic diagram of the middle C part;

[0040] Fig.10 A schematic diagram of a first state in which a mandrel of an elbow cold pushing device provided by an embodiment of the present invention drives a pipe to rotate upward;

[0041] Fig.11 A schematic diagram of a second state in which a mandrel of an elbow cold pushing device provided by an embodiment of the present invention drives a pipe to rotate upward;

[0042] Fig.12 A schematic diagram of a state in which a mandrel of an elbow cold pushing device provided by an embodiment of the present invention drives a pipe fitting to rotate upward into position;

[0043] Fig.13 A schematic diagram of a push drive member and a core rod portion of an elbow cold pushing device provided in an embodiment of the present invention.

[0044] Explanation of the accompanying drawings: 1. Equipment body; 2. Upper mold; 3. Lower mold; 31. Arc guide groove; 4. Mold closing drive member; 5. Pipe fitting; 6. Push drive member; 7. Core rod; 71. Gap; 8. Rotating structure; 81. Frame; 82. First rotating shaft; 821. Stop groove; 822. Second fixed groove; 823. Matching part; 83. Extension part; 84. Inspection part; 841. First clamping part; 8411. Semicircular groove; 8412. First fixed groove; 842. Stop part; 8421. Push groove; 8422. Limit frame; 843. Positioning pin; 9. Demolding structure; 91. Push member; 911. Support member; 912. Chamfer; 92. Hydraulic cylinder. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] Please also read Figures 1 to 13 Now, an elbow cold pushing device provided by the present invention is described. The elbow cold pushing device comprises an equipment body 1, an upper mold 2 and a lower mold 3; the upper mold 2 is connected to the mold clamping driving member 4 of the equipment body 1, and an arc-shaped guide groove 31 is provided on the upper mold 2 and the lower mold 3, and one end of the arc-shaped guide groove 31 extends in the horizontal direction; the equipment body 1 is provided with a pushing driving member 6 for pushing the pipe 5 at the position of the horizontal extension part of the arc-shaped guide groove 31; the elbow cold pushing device also comprises a mandrel 7, a rotating structure 8 and a demolding structure 9; the mandrel 7 is an arc-shaped structure; the mandrel 7 is arranged in the arc-shaped guide groove 31, and there is a gap between the mandrel 7 and the arc-shaped guide groove 31. The gap 71 is formed so that the pipe 5 can be inserted into the core rod 7; the rotating structure 8 is arranged on one side of the equipment body 1 on the lower mold 3; the rotating end of the rotating structure 8 is connected to one end of the core rod 7; wherein, after the pipe 5 is pushed out, the core rod 7 can be rotated out of the lower mold 3 driven by the rotating structure 8; the demolding structure 9 is arranged on one side of the rotating structure 8; the demolding structure 9 has a pushing component 91, and when the core rod 7 rotates to a vertical state, the pushing component 91 contacts the bottom end of the pipe 5 on the core rod 7; wherein the demolding structure 9 has a rotating shaft coaxially arranged with the core rod 7, so that the pushing component 91 can push out the pipe 5 on the core rod 7.

[0047] The elbow cold pushing equipment provided by the present invention is compared with the prior art. When pushing the pipe fitting 5 into an elbow, the operator places the pipe fitting 5 to the extended position of the arc guide groove 31 of the lower mold 3, and then the upper mold 2 is buckled on the lower mold 3 under the drive of the mold closing drive member 4; the pushing drive member 6 pushes the pipe fitting 5 in the arc guide groove 31, so that the pipe fitting 5 moves along the arc guide groove 31 and is finally sleeved on the core rod 7; after the pushing is completed, the pipe fitting 5 forms an elbow, and the pipe fitting 5 is sleeved on the core rod 7; the upper mold 2 is reset upward, and the rotating structure 8 can rotate the pipe fitting 5 out of the lower mold 3; after rotating ninety degrees, the pushing component 91 on the demolding structure 9 can push the pipe fitting 5 along the curvature direction of the core rod 7, and finally make the pipe fitting 5 separate from the core rod 7. Through the above-mentioned arrangement of the present application, the operator does not need to take the pipe fitting 5 from between the upper mold 2 and the lower mold 3, which can reduce safety hazards; the pipe fitting 5 is pushed out of the core rod 7 by the demoulding structure 9, which can reduce the difficulty of manual material removal.

[0048] It should be noted that the mold closing drive component 4 used to drive the upper mold 2 to move up and down can be a hydraulic cylinder, and the pushing drive component 6 used to push the pipe 5 into the arc guide groove 31 can be a hydraulic cylinder; the mold closing drive component 4 and the pushing drive component 6 are both existing technologies and will not be repeated here.

[0049] In some embodiments, Figures 1 to 12 As shown, the rotating structure 8 includes a frame 81, a first rotating shaft 82 and a driving member (not shown in the figure); the frame 81 is arranged on one side of the equipment body 1 at the lower mold 3; the first rotating shaft 82 is rotatably arranged on the frame 81; an extension component 83 is provided on the outer peripheral wall of the first rotating shaft 82, and the extension component 83 is connected to the outer end of the core rod 7; the driving member is arranged on the frame 81; the driving end of the driving member is connected to one end of the first rotating shaft 82 to drive the first rotating shaft 82 to rotate.

[0050] It should be noted that the driving member may be a servo motor, and the output shaft of the servo motor is connected to one end of the first rotating shaft 82, so as to drive the first rotating shaft 82 to rotate; after the pipe 5 is pushed onto the mandrel 7, that is, the pipe 5 is pushed into an elbow, the driving member drives the first rotating shaft 82 to rotate ninety degrees, so that the mandrel 7 is rotated out of the lower mold 3. By providing an extension member 83 on the first rotating shaft 82, the mandrel 7 can be connected to the first rotating shaft 82; during the rotation of the first rotating shaft 82, the mandrel 7 can be driven to rotate together.

[0051] In some embodiments, the extension component 83 may be directly fixed on the first rotating shaft 82 .

[0052] In some embodiments, Figures 1 to 12As shown, a maintenance component 84 is detachably connected to the outer peripheral wall of the first rotating shaft 82, and the maintenance component 84 is fixedly connected to the extension component 83; the maintenance component 84 includes a first clamping portion 841, a stop portion 842 and a positioning pin 843; one side of the first clamping portion 841 has a semicircular groove 8411 that is plug-matched with the first rotating shaft 82, and the other side is fixedly connected to the extension component 83; the stop portion 842 is connected in the semicircular groove 8411 of the first clamping portion 841; the first rotating shaft 82 has a stop groove 821 that is plug-matched with the stop portion 842; wherein, the first clamping portion 841 has a first fixed groove 8412 that is at a preset angle to the stop groove 821, and the first rotating shaft 82 has a second fixed groove 822 that is aligned with the first fixed groove 8412; the maintenance component 84 also includes a positioning pin 843 that is plug-matched with the first fixed groove 8412 and the second fixed groove 822. In this embodiment, the first fixing groove 8412 and the anti-rotation groove 821 are vertically arranged.

[0053] It should be noted that when installing the inspection and maintenance component 84, the first clamping portion 841 is inserted into the first rotating shaft 82, so that the anti-rotation portion 842 is plugged into and matched with the anti-rotation groove 821 on the first rotating shaft 82; at this time, the first fixed groove 8412 and the second fixed groove 822 are aligned, and then the positioning pin 843 is plugged into and matched with the first fixed groove 8412 and the second fixed groove 822, so that the first clamping portion 841 can be fixed on the first rotating shaft 82, and in the process of the first rotating shaft 82 driving the first clamping portion 841 to rotate, the first clamping portion 841 can be prevented from rotating around the axis of the first rotating shaft 82.

[0054] In some embodiments, Figures 1 to 12 As shown, the second fixing groove 822 is connected with the anti-rotation groove 821, and the anti-rotation part 842 has a push groove 8421 connected with the second fixing groove 822, and one side of the push groove 8421 is connected with the side wall of the first clamping part 841; wherein, when the first clamping part 841 is disassembled, the push groove 8421 is connected with the pressure source to push the positioning pin 843 out of the first fixing groove 8412. A limit frame 8422 is fixedly provided on the push groove 8421, and the limit frame 8422 is used to contact with the end of the positioning pin 843 to limit the position of the positioning pin 843.

[0055] It should be noted that the pressure source may be air pressure or hydraulic pressure; this embodiment is described by taking air pressure as an example; when the pressure gas is introduced into the push groove 8421, the pressure gas in the push groove 8421 will enter the second fixed groove 822, thereby causing the pressure gas to push the positioning pin 843, and finally push the positioning pin 843 out of the first fixed groove 8412. The above arrangement facilitates the removal of the positioning pin 843 from the first fixed groove 8412, thereby facilitating the disassembly of the first clamping portion 841.

[0056] In some embodiments, Figures 1 to 12 As shown, the first clamping portion 841 has a connecting rope (not shown in the figure), and the other end of the connecting rope is connected to the outer end of the positioning pin 843; the length of the connecting rope is greater than the length of the positioning pin 843, which can enable the positioning groove to slide out of the first fixing groove 8412.

[0057] It should be noted that the positioning pin 843 is connected to the first clamping portion 841 via a connecting rope, so that when the positioning pin 843 is pushed out by pressurized gas, the possibility of the positioning pin 843 being lost can be reduced.

[0058] In some embodiments, Figures 1 to 12 As shown, a matching portion 823 is fixedly provided on the first rotating shaft 82 , and the matching portion 823 can contact the bottom of the first clamping portion 841 .

[0059] It should be noted that, by providing the matching portion 823 on the first rotating shaft 82 and the matching portion 823 contacts the bottom of the first clamping portion 841 , the matching portion 823 can also play a role of circumferential limiting on the first clamping portion 841 during the process of the first rotating shaft 82 driving the first clamping portion 841 to rotate.

[0060] In some embodiments, Figures 1 to 12 As shown, the demoulding structure 9 includes a frame 81, a pushing component 91 and a driving structure; the frame 81 is arranged on one side of the equipment body 1 and the lower mold 3; one end of the pushing component 91 is hinged on the frame 81; the hinge axis of the pushing component 91 is coaxially arranged with the core rod 7 when it is vertically arranged, and one side of the pushing component 91 has a support member 911 for contacting the bottom of the pipe 5; the driving structure is arranged on the frame 81; the driving end of the driving structure is connected to the pushing component 91 so that the pushing component 91 rotates around the hinge axis; the driving structure includes a hydraulic cylinder 92, the piston rod end of the hydraulic cylinder 92 is hinged to the free end of the pushing component 91; the cylinder body of the hydraulic cylinder 92 is hinged on the frame 81; wherein, within the arc range of the core rod 7, the hydraulic cylinder 92 can drive the pushing component 91 to rotate.

[0061] It should be noted that the hydraulic cylinder 92 provides an upward thrust to the pushing component 91, which can cause the pushing component 91 to rotate around the hinge axis, and then cause the support member 911 to rotate around the circumferential direction of the core rod 7, thereby ejecting the pipe fitting 5 from the core rod 7; through the above-mentioned arrangement of the present application, the pipe fitting 5 can be separated from the core rod 7.

[0062] In some embodiments, Figures 1 to 12 As shown, one end of the support member 911 away from the pushing member 91 has a chamfer 912 , and when the core rod 7 is rotated to a vertical state, the support member 911 can contact the bottom of the pipe member 5 .

[0063] It should be noted that by providing the chamfer 912 on the support member 911, when the bottom of the mandrel 7 rotates to the position of the support member 911, it is possible to avoid interference of the support member 911 with the rotation of the mandrel 7;

[0064] In some embodiments, Fig.13 As shown, the end of the mandrel 7 facing the push driving member 6 has a first notch, and the push end of the push driving member 6 has a second notch matched with the first notch; through the above arrangement, the pipe 5 is pre-arranged into a structure with a trapezoidal longitudinal section, and then one end of the pipe 5 is first sleeved on the mandrel 7, and the push end of the push driving member 6 pushes the pipe 5, so that the pipe 5 can move along the mandrel, and finally form a bend. Through the above arrangement of the present application, the stress on the inner and outer sides of the pipe 5 during the bending process can be balanced, reducing the damage to the pipe.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An elbow cold pushing device, comprising a device body, an upper mold and a lower mold; the upper mold is connected to a mold clamping driving member of the device body, the upper mold and the lower mold are both provided with an arc guide groove, one end of the arc guide groove extends in a horizontal direction; the device body is provided with a pushing driving member for pushing a pipe fitting at the position of the horizontal extension part of the arc guide groove; characterized in that, Elbow cold pushing equipment also includes: The mandrel is an arc-shaped structure; the mandrel is arranged in the arc-shaped guide groove, and there is a gap between the mandrel and the arc-shaped guide groove so that the pipe fitting can be inserted into the mandrel; A rotating structure is arranged on one side of the equipment body at the lower mold; the rotating end of the rotating structure is connected to one end of the mandrel; wherein, after the pipe is pushed, the mandrel can be rotated out of the lower mold driven by the rotating structure; A demoulding structure is arranged on one side of the rotating structure; the demoulding structure is provided with a pushing component, and when the mandrel is rotated to a vertical state, the pushing component contacts the bottom end of the pipe on the mandrel; wherein the demoulding structure has a rotating shaft coaxially arranged with the mandrel, so that the pushing component can push out the pipe on the mandrel; The rotating structure comprises: A frame body is arranged on one side of the equipment body at the lower mold; A first rotating shaft is rotatably disposed on the frame; an extension component is provided on the outer peripheral wall of the first rotating shaft, and the extension component is connected to the outer end of the core rod; A driving member is disposed on the frame; a driving end of the driving member is connected to one end of the first rotating shaft to drive the first rotating shaft to rotate; An inspection component is detachably connected to the outer peripheral wall of the first rotating shaft, and the inspection component is fixedly connected to the extension component; The maintenance components include: A first clamping portion, one side of which has a semicircular groove for plugging and matching with the first rotating shaft, and the other side of which is fixedly connected to the extension component; The anti-rotation part is connected in the semicircular groove of the first clamping part; the first rotating shaft has an anti-rotation groove which is plugged and matched with the anti-rotation part; Wherein, the first clamping portion has a first fixing groove which is at a preset angle with the anti-rotation groove, and the first rotating shaft has a second fixing groove which is aligned with the first fixing groove; the inspection component also includes a positioning pin which is plugged and matched with the first fixing groove and the second fixing groove; The second fixing groove is connected to the anti-rotation groove, the anti-rotation portion has a push groove connected to the second fixing groove, and one side of the push groove is connected to the side wall of the first clamping portion; When the first clamping portion is disassembled, the push groove is connected to a pressure source to push the positioning pin out of the first fixing groove.

2. The elbow cold pushing equipment according to claim 1, characterized in that: The first clamping portion is provided with a connecting rope, the other end of which is connected to the outer end of the positioning pin; the length of the connecting rope is greater than the length of the positioning pin, so that the positioning slot can slide out of the first fixing slot.

3. The elbow cold pushing equipment according to claim 1, characterized in that: A matching portion is fixedly provided on the first rotating shaft, and the matching portion can contact the bottom of the first clamping portion.

4. The elbow cold pushing equipment according to claim 1, characterized in that: The demoulding structure comprises: A frame body is arranged on one side of the equipment body at the lower mold; A pushing component, one end of which is hinged on the frame; the hinge axis of the pushing component is coaxially arranged with the mandrel when the mandrel is arranged vertically, and one side of the pushing component has a support member for contacting the bottom of the pipe; The driving structure is arranged on the frame; the driving end of the driving structure is connected with the pushing component so that the pushing component rotates around the hinge shaft.

5. The elbow cold pushing equipment according to claim 4, characterized in that: One end of the support member facing away from the pushing member has a chamfer, and when the mandrel is rotated to a vertical state, the support member can contact the bottom of the pipe.

6. The elbow cold pushing equipment according to claim 4, characterized in that: The driving structure comprises a hydraulic cylinder, the piston rod end of the hydraulic cylinder is hinged to the free end of the pushing component; the cylinder body of the hydraulic cylinder is hinged to the frame body; Wherein, within the curvature range of the core rod, the hydraulic cylinder can drive the pushing component to rotate.

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