Handheld hydraulic clamp for crimping corner edges of ventilating duct

Abstract

One end of the handheld hydraulic clamp is connected with a hydraulic pump station for providing a power source through a hydraulic hose, and the other end of the handheld hydraulic clamp is used for filling and crimping the corner edge and an air pipe notch. The connecting rod push-pull clamping assembly and the piston oil cylinder assembly are supported through the clamp body, the clamp body is of a fan-shaped structure and enables the lifting sliding block to slide in a clamp body channel, and a clamp body panel is matched with the two supporting arms of the supporting plate to complete connection of the corner edge and the notch portion of the air pipe. Components of the connecting rod mechanism are connected through pin shafts, and corner edge embedding and edge pressing riveting can be completed at a time in cooperation with a spring type piston oil cylinder. The spring type piston oil cylinder is sleeved with a spring on the outer diameter of a piston sleeve, and spring seat holes used for containing auxiliary springs are formed in the clamp body on the two sides of the output end of the piston rod. According to the handheld hydraulic clamp, the lifting sliding block and the connecting rod mechanism are driven to move through the acting force of the hydraulic oil cylinder, corner edge embedding and edge pressing riveting are completed at a time on a limited construction site, and the quality and work efficiency of corner edge pressing connection can be improved.

Description

Technical Field

[0001] The present invention relates to a pipe corner edge crimping tool, and more particularly, to a handheld hydraulic pliers for crimping the corner edges of metal ventilation pipes. The corner edge crimping handheld hydraulic pliers designed by the present invention are more suitable for processing the corner edges of ventilation pipes at narrow construction sites. Background Art

[0002] When assembling industrial ventilation ducts, most of them are produced by using large-scale mechanical equipment, and it is impossible to make adaptive assembly adjustments according to the installation location at the construction site. As a result, the processing of the corner edges of the corner ducts of building and underground spaces and integrated rooftop greenhouse ventilation ducts cannot be perfect, and on the other hand, it is not convenient for later maintenance.

[0003] Figure 1 It is a partial structure of the air duct with an end flange. There is a notch on the adjacent corner of the end flange (as shown in Figure 1 (A)), and this air duct notch needs to be patched with a 90-degree corner edge (as shown in Figure 1 (B)). At present, the process of embedding the corner edge into the air duct notch and crimping it (as shown in Figure 1 (C)) is generally completed manually due to the narrow construction site, and there are technical defects such as low efficiency, high labor intensity, long construction period, and inconsistent quality.

[0004] In the prior art, the corner edge crimping process is mostly completed by manually hammering with a hammer. The crimping process is as follows: first, align the corner edge with the notch position, gently tap with a hammer to embed the corner edge into the air duct flange edge groove, and then laterally tap the riveting edge of the air duct flange to tightly press the riveting edge against the plane of the corner edge, so that the corner edge is closely attached to the air duct flange edge. The method of processing the air duct corner edge by using manual tools has disadvantages such as slow speed, poor surface quality, and poor consistency of the edge crimping and riveting quality. Therefore, a on-site construction tool that can meet the crimping of the air duct corner edge is needed to improve the assembly of the air duct. Summary of the Invention

[0005] On the one hand, in order to realize the on-site construction of the corner edge crimping of the ventilation duct, a hydraulic tool is used to replace manual operation to improve the efficiency and quality of the corner edge crimping. On the other hand, the existing corner edge hydraulic pliers adopt a double-cylinder structure and complete the corner edge embedding and crimping in two processes. The structure of the hydraulic pliers is complex, the weight is heavy and it is not convenient to operate. Compared with manual operation, its advantages are not prominent, thus affecting its popularization and use. The present invention designs a hand-held hydraulic pliers for the corner edge crimping of the ventilation duct. The technical problem to be solved by the present invention is how to improve the quality and speed of corner edge processing at the construction site of the corner edge crimping in the ventilation duct. The present invention drives the lifting slider and the connecting rod mechanism to move through the acting force of the hydraulic cylinder, and realizes the one-time completion of the corner edge embedding and the edge pressing riveting. By using a spring to cooperate with a double-piston cylinder (the combination of the piston rod and the piston sleeve), the two processes of corner edge embedding and edge wrapping and pressing are completed by one reciprocating motion of the piston. Using the hand-held hydraulic pliers of the present invention for the corner edge crimping operation of the air duct has the advantages of simple and convenient operation, high efficiency, good crimping quality, low labor intensity, and can improve the quality and work efficiency of the corner edge crimping.

[0006] A hand-held hydraulic pliers designed by the present invention for the corner edge crimping of the ventilation duct is used for the corner edge crimping process of the ventilation duct that cannot be processed by large-scale edge pressing equipment; it includes a piston cylinder assembly (3); it is characterized in that: it also includes a hand-held hydraulic pliers body (1) and a connecting rod push-pull edge folding and crimping assembly (2);

[0007] The opening arm end of the pliers body (1) is fixed to the cylinder connecting seat (3C) of the piston cylinder assembly (3); the fan-shaped arm end of the pliers body (1) is fixed to the support plate of the connecting rod push-pull edge folding and crimping assembly (2);

[0008] The pliers body channel (14) is used for the lifting slider (23A) in the intermediate connecting rod mechanism (23) to move therein;

[0009] The front end of the pliers body A arm (11) is provided with an AA front opening (11A), and one end of the cross arm (20) passes through the AA front opening (11A); the rear end of the pliers body A arm (11) is provided with an AA rear opening (11C); the A edge folding slider (21C) in the upper connecting rod mechanism (21) is placed in the AA rear opening (11C), and the A edge folding slider (21C) moves in the AA rear opening (11C); at the end of the AA front opening (11A), an AA blind hole (11D) for placing the auxiliary first spring (3F) is provided;

[0010] The front end of the B arm (12) of the clamp body is provided with an AB front opening (12A) through which the other end of the cross arm (20) passes; the rear end of the B arm (12) of the clamp body is provided with an AB rear opening (12C); the B flanging slider (22C) in the lower link mechanism (22) is placed in the AB rear opening (12C), and the B flanging slider (22C) moves within the AB rear opening (12C); at the end of the AB front opening (12A), there is an AB blind hole (12D) for placing the auxiliary second spring (3G).

[0011] The link push-pull flanging and crimping assembly (2) is composed of a cross arm (20), an upper link mechanism (21), a lower link mechanism (22), and an intermediate link mechanism (23); among them, the structures of the upper link mechanism (21) and the lower link mechanism (22) are the same; one end of the cross arm (20) is pin-connected to one end of the AA link (21A) of the upper link mechanism (21), and the other end of the cross arm (20) is pin-connected to one end of the BA link (22A) of the lower link mechanism (22).

[0012] The BA central through hole (20A) on the cross arm (20) is for the other end of the piston rod (3B) in the piston cylinder assembly (3) to pass through.

[0013] One end of the AA link (21A) and one end of the AB link (21D) are connected to the BA through hole (20B) on the cross arm (20) by the first pin (21E).

[0014] One end of the BA link (22A) and one end of the BB link (22D) are connected to the BB through hole (20C) on the cross arm (20) by the fifth pin (22E).

[0015] The A swing arm (21B) is placed in the AA rear opening (11C) of the A arm (11) of the clamp body (1).

[0016] The A sliding cavity (21C4) of the A flanging slider (21C) is for the A swing arm convex part (21B4) of the A swing arm (21B) to slide.

[0017] One end of the first pin (21E) is installed in the BC through hole (21A1) of the BA link (21A), and the other end of the first pin (21E) passes through the BA through hole (20B) of the cross arm (20) and is installed in the BE through hole (21D1) of the BB link (21D).

[0018] One end of the second pin (21F) is installed in the BD through hole (21A2) of the BA link (21A), and the other end of the second pin (21F) passes through the BG through hole (21B1) of the A swing arm (21B) and is installed in the BF through hole (21D2) of the BB link (21D).

[0019] One end of the third pin shaft (21G) is installed in the AA through hole (11B) of the pliers body A arm (11) of the pliers body (1), and the other end of the third pin shaft (21G) passes through the BI through hole (21B3) of the A swing arm (21B) and is then installed in the AC through hole (13A) of the pliers body panel (13) of the pliers body (1);

[0020] One end of the fourth pin shaft (21H) is installed in the BJ through hole (21C1) of the A hemming slider (21C), and the other end of the fourth pin shaft (21H) passes through the BH through hole (21B2) of the A swing arm (21B) and is then installed in the BK through hole (21C2) of the A hemming slider (21C); Both ends of the fourth pin shaft (21H) are respectively placed in the BJ through hole (21C1) and the BK through hole (21C2) of the A hemming slider (21C), and the fourth pin shaft (21H) can move in the BH through hole (21B2) of the A swing arm (21B);

[0021] The B swing arm (22B) is placed in the AB rear opening (12C) of the pliers body B arm (12) of the pliers body (1);

[0022] One side sliding cavity (22C4) of the B hemming slider (22C) is used for the B swing arm convex part (22B4) of the B swing arm (22B) to slide;

[0023] One end of the fifth pin shaft (22E) is installed in the BCC through hole (22A1) of the BC connecting rod (22A), and the other end of the fifth pin shaft (22E) passes through the BB through hole (20C) of the cross arm (20) and is then installed in the BEE through hole (22D1) of the BD connecting rod (22D);

[0024] One end of the sixth pin shaft (22F) is installed and sleeved in the BDD through hole (22A2) of the BC connecting rod (22A), and the other end of the sixth pin shaft (22F) passes through the BGG through hole (22B1) of the B swing arm (22B) and is then installed in the BFF through hole (22D2) of the BD connecting rod (22D);

[0025] One end of the seventh pin shaft (22G) is installed in the AB through hole (12B) of the pliers body B arm (12) of the pliers body (1), and the other end of the seventh pin shaft (22G) passes through the BII through hole (22B3) of the B swing arm (22B) and is then installed in the AD through hole (13B) of the pliers body panel (13) of the pliers body (1);

[0026] One end of the eighth pin shaft (22H) is installed in the BJJ through-hole (22C1) of the B flanging slider (22C), and the other end of the eighth pin shaft (22H) passes through the BHH through-hole (22B2) of the B swing arm (22B) and is then installed in the BKK through-hole (22C2) of the B flanging slider (22C); both ends of the eighth pin shaft (22H) are respectively placed in the BJJ through-hole (22C1) and the BKK through-hole (22C2) of the B flanging slider (22C), and the eighth pin shaft (22H) can move in the BHH through-hole (22B2) of the B swing arm (22B).

[0027] A blind hole (23A2) is provided on the connecting seat (23A1) of the lifting slider (23A), and the blind hole (23A2) is used to place the other end of the piston rod (3B) of the piston oil cylinder assembly (3); the A shaft hole (23A4) of the lifting slider (23A) is used to place the ninth pin shaft (23G1) to connect the lifting slider and the piston rod together.

[0028] The support plate (23D) is provided with a support plate A arm (23D1), a support plate B arm (23D2), and a support plate C arm (23D3); the back of the support plate B arm (23D2) and the support plate C arm (23D3) is provided with a support plate groove (23D4), and the support plate groove (23D4) is used to accommodate the waist-shaped hole convex edge (5A) of the angle edge (5); the support plate A arm (23D1) is provided with a B shaft hole (23D11) and a C shaft hole (23D12); the support plate (23D) will rotate around the eleventh pin shaft (23G3) under the drive of the piston oil cylinder, causing the support plate B arm (23D2) and the support plate C arm (23D3) to lift; the support plate B arm (23D2) and the support plate C arm (23D3) that lift while carrying the angle edge (5) are beneficial to inserting both ends of the angle edge (5) into the notch of the air duct (4), and driving the lifting slider (23A) and the linkage mechanism to move through the action force of the hydraulic oil cylinder, realizing the one-time completion of angle edge embedding and edge pressing riveting.

[0029] One end of the ninth pin shaft (23G1) is installed in the CA through-hole (23B1) of the lifting A link (23B), and the other end of the ninth pin shaft (23G1) passes through the A shaft hole (23A4) of the handle (23A3) of the lifting slider (23A) and is then installed in the CC through-hole (23C1) of the lifting B link (23C).

[0030] One end of the tenth pin shaft (23G2) is installed in the CB through-hole (23B2) of the lifting A link (23B), and the other end of the tenth pin shaft (23G2) passes through the C shaft hole (23D12) of the support plate A arm (23D1) of the support plate (23D) and is then installed in the CD through-hole (23C2) of the lifting B link (23C).

[0031] One end of the eleventh pin shaft (23G3) is installed in the CE through hole (23E1) of the lifting A support (23E), and the other end of the eleventh pin shaft (23G3) passes through the B shaft hole (23D11) of the pallet A arm (23D1) of the pallet (23D) and is then installed in the CF through hole (23F1) of the lifting B support (23F).

[0032] In the piston cylinder assembly (3), the piston rod (3B) is located in the middle of the cylinder (3A). A piston sleeve (3D) and a piston return spring (3E) are provided between the piston rod (3B) and the cylinder (3A), and the piston return spring (3E) is sleeved outside the piston sleeve (3D).

[0033] The center of the cylinder connection seat (3C) in the piston cylinder assembly (3) is the C center through hole (3C3). One end of the piston sleeve (3D) is installed in the C center through hole (3C3), and the other end of the piston sleeve (3D) is installed at the end of the piston rod (3B). The other end of the piston rod (3B) passes through the BA center through hole (20A) of the cross arm (20) of the connecting rod push-pull clamping assembly (2) and is then installed in the blind hole (23A2) of the lifting slider (23A) of the intermediate connecting rod mechanism (23). A bottom plate (3C1) is provided on the cylinder connection seat (3C), and a hollow cylinder (3C2) is at one end of the bottom plate (3C1). The installation end of the cylinder (3A) is connected to the hollow cylinder (3C2). The other end of the bottom plate (3C1) is fixed to the clamp body A arm (11) and the clamp body B arm (12) of the clamp body (1).

[0034] The advantages of the hand-held hydraulic clamp designed by the present invention for crimping the corner edges of ventilation ducts are as follows:

[0035] ① By using three groups of connecting rod mechanisms in cooperation with the hydraulic piston cylinder, the two process actions of corner edge pressing and edge crimping riveting can be completed through one reciprocating movement of the cylinder piston, which not only simplifies the operation but also avoids the confusion of action sequences. The process actions that traditionally require two cylinders are integrated into one cylinder, and in cooperation with the piston return spring, the corner edge embedding and edge folding crimping actions are completed, saving the layout space of the tool and reducing the structural weight, enabling the edge crimping tool to be handheld, greatly improving the convenience of use, and making the use and operation not restricted by the narrow construction site.

[0036] ② The three groups of connecting rod mechanisms designed by the present invention, as Figure 2 shown, are divided into upper, middle, and lower groups. Driven by the hydraulic cylinder piston, the middle connecting rod mechanism and the upper and lower connecting rod mechanisms move successively to complete the two process actions of corner edge pressing and edge crimping riveting.

[0037] ③ The sector-shaped pliers designed in the present invention can release the angular edge installation space when the slider of the intermediate link mechanism retracts at the opening support arm end, and then use the piston rod to push the slider to merge the angular edge support plate at the sector-shaped support arm end; then use the piston sleeve to push the cross arm and the upper and lower link mechanisms to move to achieve hemming and angular edge crimping. This layout enables the overall structure to be miniaturized.

[0038] ④ By arranging these three groups of link mechanisms in parallel along the axis of the piston link, and through reasonable distribution of the double-piston action area, the stiffness and compression amount of the piston return spring, and the piston stroke, the sequential actions of the two processes of angular edge crimping can be smoothly completed without confusion in the action sequence.

[0039] ⑤ The handheld hydraulic pliers designed in the present invention can be used at the construction site of narrow pipelines. Place the front end of the hydraulic pliers on the notch position of the air duct end face, make the support arms on both sides of the support plate adhere to the inner wall of the air duct, and keep the hydraulic pliers in a roughly horizontal position. Operate the hydraulic solenoid valve switch button to make the hydraulic piston act, and push the link mechanism to complete angular edge pressing and edge riveting. Description of the Drawings

[0040] Figure 1 It is a schematic diagram of the process of filling the angular edge for hemming the end of the air duct.

[0041] Figure 2 It is an external structure diagram of the handheld hydraulic pliers for angular edge crimping of ventilation ducts in the present invention.

[0042] Figure 2A It is an external structure diagram of the handheld hydraulic pliers for angular edge crimping of ventilation ducts in the present invention from another perspective.

[0043] Figure 2B It is a distribution diagram of the link mechanism in the handheld hydraulic pliers for angular edge crimping of ventilation ducts in the present invention.

[0044] Figure 2C It is an external six-sided view of the handheld hydraulic pliers for angular edge crimping of ventilation ducts in the present invention.

[0045] Figure 3 It is an external structure diagram of the piston cylinder assembly in the present invention. Figure 3A It is a structure diagram of the cylinder connection seat in the piston cylinder assembly of the present invention.

[0046] Figure 3B It is a schematic diagram of the position of the first-stage action of the piston rod and the piston sleeve in the present invention.

[0047] Figure 3C It is a schematic diagram of the position of the second-stage action of the piston sleeve in the present invention (the position of the piston rod remains unchanged after completing the first-stage action).

[0048] Figure 4It is the upper structure diagram of the pliers body of the present invention.

[0049] Figure 4A It is the structure diagram of another perspective of the upper part of the pliers body of the present invention.

[0050] Figure 4B It is the lower structure diagram of the pliers body of the present invention.

[0051] Figure 4C It is the structure diagram of another perspective of the lower part of the pliers body of the present invention.

[0052] Figure 4D It is the structure diagram of the pliers body of the present invention.

[0053] Figure 5 It is the structure diagram of the connecting rod push-pull flanging and crimping assembly of the present invention.

[0054] Figure 5A It is the structure diagram of another perspective of the connecting rod push-pull flanging and crimping assembly of the present invention.

[0055] Figure 6 It is the structure diagram of the cross arm in the connecting rod push-pull flanging and crimping assembly of the present invention.

[0056] Figure 7 It is the exploded view of the upper connecting rod mechanism in the connecting rod push-pull flanging and crimping assembly of the present invention.

[0057] Figure 7A It is the structure diagram of the flanging slider in the upper connecting rod mechanism of the present invention.

[0058] Figure 8 It is the exploded view of the lower connecting rod mechanism in the connecting rod push-pull flanging and crimping assembly of the present invention.

[0059] Figure 8A It is the structure diagram of the flanging slider in the lower connecting rod mechanism of the present invention.

[0060] Figure 9 It is the structure diagram of the intermediate connecting rod mechanism in the connecting rod push-pull flanging and crimping assembly of the present invention.

[0061] Figure 9A It is the structure diagram of the support plate in the intermediate connecting rod mechanism of the present invention.

[0062] Figure 9B It is the structure diagram of the lifting slider in the intermediate connecting rod mechanism of the present invention.

[0063] Figure 9C It is the exploded view of the intermediate connecting rod mechanism of the present invention.

[0064] Figure 10 It is the schematic diagram of the front-end support plate of the hand-held hydraulic pliers being lifted.

[0065] Figure 11It is a schematic diagram of the state when the hand-held hydraulic crimper of the present invention is used for crimping the corner edge of a ventilation duct.

[0066]

[0067] Detailed implementation manners

[0068] The present invention will be further described in detail below with reference to the accompanying drawings. The exemplary parameters listed are only the preferred implementation manners of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

[0069] A hand-held hydraulic crimper designed by the present invention for crimping the corner edge of a ventilation duct is used for the corner edge crimping process of a ventilation duct that cannot be processed by a large-scale edge pressing device. The hand-held hydraulic crimper of the present invention drives the lifting slider and the connecting rod mechanism to move through the work of the hydraulic cylinder, and realizes the one-time completion of corner edge embedding and edge pressing riveting, which can improve the quality and work efficiency of the corner edge crimping of the ventilation duct.

[0070] See Figure 2 、 Figure 2A 、 Figure 2B As shown, a hand-held hydraulic crimper designed by the present invention for crimping the corner edge of a ventilation duct includes a pliers body 1, a connecting rod push-pull and edge folding crimping component 2, and a piston cylinder component 3. The pliers body 1 and the connecting rod push-pull and edge folding crimping component 2 are made of medium carbon steel. The piston cylinder component 3 provides power for the corner edge lifting, embedding and crimping and the movement of the connecting rod push-pull and edge folding crimping component. The hand-held hydraulic crimper can be designed into a large size or a small size according to the construction environment and the specifications of the ventilation duct. The designed hand-held hydraulic crimper is applicable to the crimping of the corner edge of a building ventilation duct.

[0071] The connecting rod mechanism (as shown in Figure 2B ) in the connecting rod push-pull and edge folding crimping component 2 designed by the present invention is composed of an upper connecting rod mechanism 21, an intermediate connecting rod mechanism 24 and a lower connecting rod mechanism 22. The upper connecting rod mechanism 21 and the lower connecting rod mechanism 22 have the same structure. The intermediate connecting rod mechanism 24 is located between the upper connecting rod mechanism 21 and the lower connecting rod mechanism 22. As shown in Figure 2B , the upper connecting rod mechanism 21 and the lower connecting rod mechanism 22 are arranged vertically.

[0072] The upper connecting rod mechanism 21 is composed of a BA connecting rod 21A, a BB connecting rod 21D, an A swing arm 21B, an A edge folding slider 21C and a pin shaft combination.

[0073] The lower connecting rod mechanism 22 is composed of a BC connecting rod 22A, a BD connecting rod 22D, a B swing arm 22B, a B edge folding slider 22C and a pin shaft combination.

[0074] The middle link mechanism 24 is composed of a lifting slider 23A, a support plate A link 23B, a support plate B link 23C, a support plate 23D and a pin shaft combination.

[0075] Piston cylinder assembly 3

[0076] See Figure 2 、 Figure 2A 、 Figure 2B 、 Figure 3 、 Figure 3A 、 Figure 3B 、 Figure 3C As shown in Figure 3B 、

[0077] An auxiliary first spring 3F and an auxiliary second spring 3G form a set of spring members, and the other set is the piston return spring 3E. The auxiliary first spring 3F is installed in the AA blind hole 11D at the open arm end of the pliers body 1 (as shown in Figure 4B ). The auxiliary second spring 3G is installed in the AB blind hole 12D at the open arm end of the pliers body 1 (as shown in Figure 4C ). The end face of the open arm end of the pliers body 1 contacts the oil cylinder connection seat 3C.

[0078] As Figure 3 、 Figure 3A shown, the center of the oil cylinder connection seat 3C is the C center through hole 3C3, and one end of the piston sleeve 3D is installed in the C center through hole 3C3. The other end of the piston sleeve 3D is installed at the end of the piston rod 3B. The other end of the piston rod 3B passes through the BA center through hole 20A of the cross arm 20 of the link push-pull clamping assembly 2 and is installed in the blind hole 23A2 of the lifting slider 23A of the middle link mechanism 23 (as shown in Figure 9B ). The oil cylinder connection seat 3C is provided with a bottom plate 3C1, and a hollow cylinder 3C2 is at one end of the bottom plate 3C1. The installation end of the oil cylinder 3A is connected to the hollow cylinder 3C2. The other end of the bottom plate 3C1 is fixed to the pliers body A arm 11 and the pliers body B arm 12 of the pliers body 1.

[0079] As Figure 3, Figure 3B , Figure 3C As shown in Figure 3B and Figure 3C , the piston rod 3B is located in the middle of the oil cylinder 3A. A piston sleeve 3D and a piston return spring 3E are provided between the piston rod 3B and the oil cylinder 3A, and the piston return spring 3E is sleeved outside the piston sleeve 3D. In order to achieve the sealing effect, seals (generally Y-shaped sealing rings) are installed at the joints of the oil cylinder 3A, the piston sleeve 3D, the piston rod 3B, and the oil cylinder connecting seat 3C.

[0080] In the present invention, the piston oil cylinder assembly 3 adopts a double-piston structure combining a piston rod and a piston sleeve, which can complete two processing procedures of corner edge pressing and flanging riveting after one reciprocating motion, and can be used for construction operations in a narrow site, which not only simplifies the operation process of the hydraulic pliers but also avoids misoperations.

[0081] In addition, different from the processing procedures completed by using two oil cylinders, integrating them into one oil cylinder saves the layout space of the tool and reduces the structural weight, enabling the flanging tool to be handheld, greatly improving the convenience of use, and the use and operation are not restricted by the narrow construction site.

[0082] Clamp body 1

[0083] Refer to Figure 2 , Figure 2A , Figure 2B , Figure 4 , Figure 4A , Figure 4B , Figure 4C , Figure 4D As shown in Figure 2 , Figure 2A , Figure 2B , Figure 4 , Figure 4A , Figure 4B , Figure 4C , Figure 4D , the pliers body 1 is a fan-shaped structural part formed integrally, that is, one end is the pliers body opening arm end, and the other end is the pliers body fan-shaped arm end. If the pliers body 1 is distributed vertically (as shown in Figure 4 ), it is said that the pliers body 1 is provided with a pliers body A arm 11, a pliers body B arm 12, and a pliers body panel 13; between the pliers body A arm 11 and the pliers body B arm 12 is the pliers body channel 14. If the pliers body 1 is distributed horizontally (as shown in Figure 4 ), the left end of the pliers body 1 is called the opening arm end, and the right end of the pliers body 1 is called the fan-shaped arm end. The pliers body channel 14 is used for the lifting slider 23A in the intermediate link mechanism 23 to move therein.

[0084] The pliers body A arm 11 is provided with an AA through hole 11B; the front end of the pliers body A arm 11 is provided with an AA front opening 11A, and one end of the cross arm 20 passes through the AA front opening 11A; the rear end of the pliers body A arm 11 is provided with an AA rear opening 11C. The A flanging slider 21C in the upper link mechanism 21 is placed in the AA rear opening 11C, and the A flanging slider 21C moves in the AA rear opening 11C. At the end of the AA front opening 11A, there is an AA blind hole 11D for placing the auxiliary first spring 3F (as shown in Figure 4B ). ​​​​​​

[0085] The AB through-hole 12B is provided on the clamp body B support arm 12; an AB front opening 12A is provided at the front end of the clamp body B support arm 12, and the other end of the cross arm 20 is used to pass through the AB front opening 12A; an AB rear opening 12C is provided at the rear end of the clamp body B support arm 12. The B flanging slider 22C in the lower link mechanism 22 is placed in the AB rear opening 12C, and the B flanging slider 22C moves in the AB rear opening 12C. An AB blind hole 12D for placing the auxiliary second spring 3G is provided at the end of the AB front opening 12A (as Figure 4C shown).

[0086] The AC through-hole 13A and the AD through-hole 13B are provided on the clamp body panel 13.

[0087] In the present invention, the AA through-hole 11B on the clamp body A support arm 11, the BI through-hole 21B3 on the A swing arm 21B of the link push-pull clamping assembly 2, and the AC through-hole 13A on the clamp body panel 13 are simultaneously matched with a pin 21G, and form a rotation around the pin.

[0088] In the present invention, the AB through-hole 12B on the clamp body B support arm 12, the BII through-hole 22B3 on the B swing arm 22B of the link push-pull clamping assembly 2, and the AD through-hole 13B on the clamp body panel 13 are simultaneously matched with another pin 22G, and form a rotation around the pin.

[0089] In the present invention, the fan-shaped support arm end of the clamp body 1 is fixed to the support plate seat of the link push-pull flanging and crimping assembly 2. The open support arm end of the clamp body 1 is fixed to the oil cylinder connection seat 3C of the piston oil cylinder assembly 3. As Figure 4B and Figure 4C shown, four threaded blind holes are respectively provided on the end face of the open support arm end of the clamp body 1 as Figure 3A shown, four through-holes for the long screws to pass through are provided on the oil cylinder connection seat 3C, and the threaded blind holes, the through-holes are matched with the long screws to achieve the threaded fixation of the open support arm end and the oil cylinder connection seat 3C.

[0090] Link push-pull hemming and crimping assembly 2

[0091] See Figure 2 、 Figure 2A 、 Figure 2B 、 Figure 5 、 Figure 5A shown, the link push-pull flanging and crimping assembly 2 is composed of a cross arm 20, an upper link mechanism 21, a lower link mechanism 22 and an intermediate link mechanism 23. Among them, the structures of the upper link mechanism 21 and the lower link mechanism 22 are the same. One end of the cross arm 20 is pin-connected to one end of the AA link 21A of the upper link mechanism 21, and the other end of the cross arm 20 is pin-connected to one end of the BA link 22A of the lower link mechanism 22.

[0092] The maximum distance between the front panel 20D of the cross arm 20 and the outer end face of the lifting slider 23A is the maximum stroke of the piston rod 3A.

[0093] As Figure 6 shown, a BA central through hole 20A is provided at the center of the cross arm 20; a BA through hole 20B is provided at one end of the cross arm 20, and a BB through hole 20C is provided at the other end of the cross arm 20. One end panel of the cross arm 20 is called the front panel 20D, and the other end panel of the cross arm 20 is called the rear panel 20E.

[0094] The BA central through hole 20A on the cross arm 20 is for the other end of the piston rod 3B in the piston cylinder assembly 3 to pass through.

[0095] One end of the AA connecting rod 21A and one end of the AB connecting rod 21D are connected to the BA through hole 20B on the cross arm 20 through the first pin shaft 21E.

[0096] One end of the BA connecting rod 22A and one end of the BB connecting rod 22D are connected to the BB through hole 20C on the cross arm 20 through the fifth pin shaft 22E.

[0097] As Figure 5 、 Figure 7 、 Figure 7A shown, the upper connecting rod mechanism 21 is composed of a BA connecting rod 21A, an A swing arm 21B, an A flanging slider 21C, a BB connecting rod 21D and a pin shaft. Among them, the structures of the BA connecting rod 21A and the BB connecting rod 21D are the same.

[0098] A BC through hole 21A1 is provided at one end of the BA connecting rod 21A, and a BD through hole 21A2 is provided at the other end of the BA connecting rod 21A.

[0099] A BE through hole 21D1 is provided at one end of the BB connecting rod 21D, and a BF through hole 21D2 is provided at the other end of the BB connecting rod 21D.

[0100] BG through hole 21B1, BH through hole 21B2 and BI through hole 21B3 are provided on the A swing arm 21B. An A swing arm convex part 21B4 is provided at the upper part of one end of the A swing arm 21B. The A swing arm 21B is placed in the AA rear opening 11C of the A support arm 11 of the pliers body 1.

[0101] BJ through hole 21C1 and BK through hole 21C2 are provided on the A flanging slider 21C, and an A opening groove 21C3 and an A sliding cavity 21C4 are provided on one side edge of the A flanging slider 21C. The A sliding cavity 21C4 is for the A swing arm convex part 21B4 of the A swing arm 21B to slide.

[0102] One end of the first pin shaft 21E is installed in the BC through hole 21A1 of the BA connecting rod 21A, and the other end of the first pin shaft 21E passes through the BA through hole 20B of the cross arm 20 and is then installed in the BE through hole 21D1 of the BB connecting rod 21D.

[0103] One end of the second pin shaft 21F is installed in the BD through hole 21A2 of the BA connecting rod 21A, and the other end of the second pin shaft 21F passes through the BG through hole 21B1 of the A swing arm 21B and is then installed in the BF through hole 21D2 of the BB connecting rod 21D.

[0104] One end of the third pin shaft 21G is installed in the AA through hole 11B of the pliers body A support arm 11 of the pliers body 1, and the other end of the third pin shaft 21G passes through the BI through hole 21B3 of the A swing arm 21B and is then installed in the AC through hole 13A of the pliers body panel 13 of the pliers body 1.

[0105] One end of the fourth pin shaft 21H is installed in the BJ through hole 21C1 of the A hemming slider 21C, and the other end of the fourth pin shaft 21H passes through the BH through hole 21B2 of the A swing arm 21B and is then installed in the BK through hole 21C2 of the A hemming slider 21C. Both ends of the fourth pin shaft 21H are respectively placed in the BJ through hole 21C1 and the BK through hole 21C2 of the A hemming slider 21C, and the fourth pin shaft 21H can move in the BH through hole 21B2 of the A swing arm 21B.

[0106] Such as Figure 5 、 Figure 8 、 Figure 8A As shown, the lower link mechanism 22 is composed of a BC connecting rod 22A, a B swing arm 22B, a B hemming slider 22C, a BD connecting rod 22D and pin shafts. Among them, the BC connecting rod 22A and the BD connecting rod 22D have the same structure.

[0107] One end of the BC connecting rod 22A is provided with a BCC through hole 22A1, and the other end of the BC connecting rod 22A is provided with a BDD through hole 22A2.

[0108] One end of the BD connecting rod 22D is provided with a BEE through hole 22D1, and the other end of the BD connecting rod 22D is provided with a BFF through hole 22D2.

[0109] The B swing arm 22B is provided with BGG through hole 22B1, BHH through hole 22B2, BII through hole 22B3. One upper part of one end of the B swing arm 22B is provided with a B swing arm convex part 22B4. The B swing arm 22B is placed in the AB rear opening 12C of the pliers body B support arm 12 of the pliers body 1.

[0110] The B hemming slider 22C is provided with BJJ through hole 22C1, BKK through hole 22C2, and a B opening groove 22C3 and a B sliding cavity 22C4 are provided on one side edge of the B hemming slider 22C. The B sliding cavity 22C4 is used for the B swing arm convex part 22B4 of the B swing arm 22B to slide.

[0111] One end of the fifth pin shaft 22E is installed in the BCC through hole 22A1 of the BC connecting rod 22A, and the other end of the fifth pin shaft 22E passes through the BB through hole 20C of the cross arm 20 and is then installed in the BEE through hole 22D1 of the BD connecting rod 22D.

[0112] One end of the sixth pin shaft 22F is installed and sleeved in the BDD through hole 22A2 of the BC connecting rod 22A, and the other end of the sixth pin shaft 22F passes through the BGG through hole 22B1 of the B swing arm 22B and is then installed in the BFF through hole 22D2 of the BD connecting rod 22D.

[0113] One end of the seventh pin shaft 22G is installed in the AB through hole 12B of the pliers body B support arm 12 of the pliers body 1, and the other end of the seventh pin shaft 22G passes through the BII through hole 22B3 of the B swing arm 22B and is then installed in the AD through hole 13B of the pliers body panel 13 of the pliers body 1.

[0114] One end of the eighth pin shaft 22H is installed in the BJJ through hole 22C1 of the B flanging slider 22C, and the other end of the eighth pin shaft 22H passes through the BHH through hole 22B2 of the B swing arm 22B and is then installed in the BKK through hole 22C2 of the B flanging slider 22C. Both ends of the eighth pin shaft 22H are respectively placed in the BJJ through hole 22C1 and the BKK through hole 22C2 of the B flanging slider 22C, and the eighth pin shaft 22H can move in the BHH through hole 22B2 of the B swing arm 22B.

[0115] As Figure 5 、 Figure 9 、 Figure 9A 、 Figure 9B 、 Figure 9C shown, the intermediate connecting rod mechanism 23 is composed of a lifting slider 23A, a lifting A connecting rod 23B, a lifting B connecting rod 23C, a support plate 23D, a lifting A support 23E, a lifting B support 23F and a pin shaft. Among them, the structures of the lifting A connecting rod 23B and the lifting B connecting rod 23C are the same. The structures of the lifting A support 23E and the lifting B support 23F are the same.

[0116] A blind hole 23A2 is provided on the connecting seat 23A1 of the lifting slider 23A for placing the other end of the piston rod 3B of the piston cylinder assembly 3 (as Figure 3 、 Figure 9B shown). An A shaft hole 23A4 for placing the ninth pin shaft 23G1 (as Figure 9B 、 Figure 9C shown) is provided at the end of the handle 23A3 of the lifting slider 23A.

[0117] As Figure 9C shown, one end of the lifting A connecting rod 23B is provided with a CA through hole 23B1, and the other end of the lifting A connecting rod 23B is provided with a CB through hole 23B2.

[0118] As shown Figure 9C in the figure, one end of the lifting B connecting rod 23C is provided with a CC through hole 23C1, and the other end of the lifting B connecting rod 23C is provided with a CD through hole 23C2.

[0119] The support plate 23D is provided with a support plate A arm 23D1, a support plate B arm 23D2, and a support plate C arm 23D3; the back of the support plate B arm 23D2 and the support plate C arm 23D3 is provided with a support plate groove 23D4 (as shown Figure 9A in the figure), and the support plate groove 23D4 is used to accommodate the waist-shaped hole convex edge 5A of the angle edge 5 (as shown Figure 1 in the figure). The support plate A arm 23D1 is provided with a B shaft hole 23D11 and a C shaft hole 23D12. Driven by the piston oil cylinder, the support plate 23D rotates around the eleventh pin shaft 23G3, causing the support plate B arm 23D2 and the support plate C arm 23D3 to lift. The support plate B arm 23D2 and the support plate C arm 23D3 that lift while carrying the angle edge 5 are conducive to inserting both ends of the angle edge 5 into the notch of the air duct 4. By the action force of the hydraulic cylinder, the lifting slider 23A and the linkage mechanism are driven to complete the angle edge embedding and edge pressing riveting at one time.

[0120] The lifting A support 23E is provided with a CE through hole 23E1, and the CE through hole 23E1 is used to place one end of the eleventh pin shaft 23G3. The bottom of the lifting A support 23E is provided with two threaded holes for installing the first screw 23G4 and the second screw 23G5. By matching the other ends of the first screw 23G4 and the second screw 23G5 with two threaded holes on the clamp body panel 13 of the clamp body 1 (as shown Figure 4B 、 Figure 4C in the figure), the fixing of the lifting A support 23E and the clamp body panel 13 is realized.

[0121] The lifting B support 23F is provided with a CF through hole 23F1, and the CF through hole 23F1 is used to place the other end of the eleventh pin shaft 23G3. The bottom of the lifting B support 23F is provided with two threaded holes for installing the third screw 23G6 and the fourth screw 23G7. By matching the other ends of the third screw 23G6 and the fourth screw 23G7 with two threaded holes on the clamp body panel 13 of the clamp body 1 (as shown Figure 4B 、 Figure 4C in the figure), the fixing of the lifting B support 23F and the clamp body panel 13 is realized.

[0122] One end of the ninth pin shaft 23G1 is installed in the CA through hole 23B1 of the lifting A connecting rod 23B, and the other end of the ninth pin shaft 23G1 passes through the A shaft hole 23A4 of the handle 23A3 of the lifting slider 23A and is then installed in the CC through hole 23C1 of the lifting B connecting rod 23C.

[0123] One end of the tenth pin shaft 23G2 is installed in the CB through hole 23B2 of the lifting A connecting rod 23B, and the other end of the tenth pin shaft 23G2 passes through the C shaft hole 23D12 of the support plate A arm 23D1 of the support plate 23D and is then installed in the CD through hole 23C2 of the lifting B connecting rod 23C.

[0124] One end of the eleventh pin shaft 23G3 is installed in the CE through hole 23E1 of the lifting A support 23E, and the other end of the eleventh pin shaft 23G3 passes through the B shaft hole 23D11 of the support plate A arm 23D1 of the support plate 23D and is then installed in the CF through hole 23F1 of the lifting B support 23F.

[0125] In the present invention, the actuation of the connecting rod push-pull hemming and crimping assembly 2 is completed by the cooperation of the cross arm 20 and the upper, middle and lower sets of connecting rod mechanisms. The movement processes of the upper and lower connecting rod mechanisms (21, 22) of the present invention are the same, and only the movement process of the upper connecting rod mechanism 21 will be described. The movement process of the upper connecting rod mechanism 21 is as follows: When the oil cylinder 3A does not supply high-pressure oil, under the action of the piston return spring force, the piston sleeve 3D and the piston rod 3B move backward to the position at the top of the oil cylinder (i.e., the starting position, as Figure 3C shown), under the action of the auxiliary springs (3F, 3G), the cross arm 20 realizes the retraction of the hemming slider 21C through the movement of the upper and lower connecting rod mechanisms. When high-pressure oil enters the oil cylinder 3A, the piston rod 3B and the piston sleeve 3D move simultaneously. In the initial stage of the movement (referred to as the first-stage action), due to the gap between the front panel 3D1 of the piston sleeve 3D and the rear panel 20E of the cross arm 20, the cross arm 20 remains stationary. When the front panel 3D1 of the piston sleeve 3D contacts the rear panel 20E of the cross arm 20, it is exactly when the piston rod 3B pushes the lifting slider 23A to complete the corner edge lifting and embedding (referred to as the critical point where the first-stage action of the piston ends and the second-stage action starts). After that, the piston rod 3B no longer moves forward, while the piston sleeve 3D continues to move under the action of the pressure oil (referred to as the second-stage action), pushing the cross arm 20 forward, thereby driving the connecting rod mechanism to complete the hemming and crimping actions.

[0126] The movement process of the intermediate link mechanism 23 of the present invention is as follows: When the oil cylinder 3A does not supply high-pressure oil, under the action of the piston return spring force, the piston sleeve 3D and the piston rod 3B move backward to return to the position at the top of the oil cylinder. During this process, the piston rod 3B pulls the lifting slider 23A to retract, and the support plate 23D is opened through the movement of the intermediate link mechanism. After the support plate 23D is opened, the corner-edge workpiece can be placed on the support plate 23D to prepare for the next crimping. When high-pressure oil enters the oil cylinder 3A, the piston rod 3B and the piston sleeve 3D move simultaneously. In the initial stage of the movement (referred to as the first-stage action), the piston rod 3B pushes the lifting slider 23A to complete the corner-edge lifting and embedding. During this stage, since there is a gap between the front panel 3D1 of the piston sleeve and the rear panel 20E of the cross arm 20, the cross arm 20 remains stationary. During the second-stage action of the piston, the piston rod 3B remains stationary. When the second-stage action is completed, the pressure supply of the oil cylinder is cut off, and the piston returns to the starting position under the action of the piston return spring.

[0127] See Figure 10 、 Figure 11 As shown, the operations for the corner-edge embedding and crimping process of the air duct using the air duct corner-edge crimping hand-held hydraulic press designed by the present invention are as follows:

[0128] Step 1: Adjust the hand-held hydraulic press designed by the present invention, and make the support plate B arm 23D2 and the support plate C arm 23D3 of the support plate 23D tilt upward, as Figure 10 shown;

[0129] Step 2: Place the corner edge 5 on the groove 23D4 on the back of the support plate B arm 23D2 and the support plate C arm 23D3;

[0130] Step 3: Place the clamp body 1 above the notch position of the air duct 4, and make the two side surfaces of the positioning triangular block 6 stick to the inner wall of the air duct 4, so that the piston rod 3B in the piston cylinder assembly 3 of the hand-held hydraulic press is on the same horizontal axis as the corner-edge repair notch 4A of the air duct 4, as Figure 11 shown;

[0131] Step 4: Press the solenoid valve button to make the hydraulic oil enter the oil cylinder and push the piston rod 3B to complete the corner-edge crimping of the air duct 4;

[0132] Step 5: Release the solenoid valve button, the hydraulic oil is depressurized, and under the action of the return of the piston rod 3B, each moving part of the hand-held hydraulic press designed by the present invention returns to the initial position.

[0133] As described above, it can be seen that the hand-held hydraulic pliers of the present invention have significant technical effects on the connecting corner edges of the ventilation duct gap on site. The advancement of the piston rod causes the pallet B arm 23D2 and the pallet C arm 23D3 of the pallet 23D to tilt upward, and at the same time, the three groups of link mechanisms follow the movement. The corner edge is smoothly placed in the gap 23D4 on the back of the pallet 23D by the magnet. When the pliers body panel 13 approaches the duct gap, both sides of the corner edge will be steadily inserted into the duct gap. When the corner edge fits with the duct gap, under the hydraulic thrust of the piston rod, the pallet B arm 23D2 and the pallet C arm 23D3 of the pallet 23D are lowered until the joint is completed, and the piston rod retracts, and the three groups of link mechanisms return to the initial state (as Figure 2 shown).

Claims

1. A hand-held hydraulic pliers for crimping the corners of ventilation ducts, which is used for crimping the corners of ventilation ducts that cannot be crimped by large crimping equipment; comprising a piston cylinder assembly (3); characterized in that: It also includes a handheld hydraulic pliers body (1) and a connecting rod push-pull folding crimping assembly (2); The open support arm end of the pliers body (1) is fixed to the oil cylinder connection seat (3C) of the piston oil cylinder assembly (3); the fan-shaped support arm end of the pliers body (1) is fixed to the support plate support seat of the connecting rod push-pull folding crimping assembly (2); The clamp body channel (14) is used for the lifting slider (23A) in the intermediate link mechanism (23) to move therein; The front end of the caliper body A support arm (11) is provided with an AA front opening (11A), and the AA front opening (11A) is used for one end of the cross arm (20) to pass through; the rear end of the caliper body A support arm (11) is provided with an AA rear opening (11C); the A folding slider (21C) in the upper connecting rod mechanism (21) is placed in the AA rear opening (11C), and the A folding slider (21C) moves in the AA rear opening (11C); and the end of the AA front opening (11A) is provided with an AA blind hole (11D) for placing an auxiliary first spring (3F); The front end of the caliper body B support arm (12) is provided with an AB front opening (12A), and the AB front opening (12A) is used for the other end of the cross arm (20) to pass through; the rear end of the caliper body B support arm (12) is provided with an AB rear opening (12C); the B folding slider (22C) in the lower connecting rod mechanism (22) is placed in the AB rear opening (12C), and the B folding slider (22C) moves in the AB rear opening (12C); the end of the AB front opening (12A) is provided with an AB blind hole (12D) for placing an auxiliary second spring (3G); The connecting rod push-pull folding crimping assembly (2) is composed of a cross arm (20), an upper connecting rod mechanism (21), a lower connecting rod mechanism (22) and an intermediate connecting rod mechanism (23); wherein the upper connecting rod mechanism (21) and the lower connecting rod mechanism (22) have the same structure; one end of the cross arm (20) is connected to one end of the AA connecting rod (21A) of the upper connecting rod mechanism (21) by a pin shaft, and the other end of the cross arm (20) is connected to one end of the BA connecting rod (22A) of the lower connecting rod mechanism (22) by a pin shaft; The BA center through hole (20A) on the cross arm (20) is used for the other end of the piston rod (3B) in the piston cylinder assembly (3) to pass through; The BA through hole (20B) on the cross arm (20) is connected to one end of the AA connecting rod (21A) and one end of the AB connecting rod (21D) via a first pin shaft (21E); The BB through hole (20C) on the cross arm (20) is connected to one end of the BA connecting rod (22A) and one end of the BB connecting rod (22D) via a fifth pin shaft (22E); The A swing arm (21B) is placed in the AA rear opening (11C) of the clamp body A support arm (11) of the clamp body (1); The A sliding cavity (21C4) of the A folding slider (21C) is used for the A swing arm protrusion (21B4) of the A swing arm (21B) to slide; One end of the first pin shaft (21E) is installed in the BC through hole (21A 1) of the BA connecting rod (21A), and the other end of the first pin shaft (21E) passes through the BA through hole (20B) of the cross arm (20) and is then installed in the BE through hole (21D 1) of the BB connecting rod (21D); One end of the second pin shaft (21F) is installed in the BD through hole (21A2) of the BA connecting rod (21A), and the other end of the second pin shaft (21F) passes through the BG through hole (21B1) of the A swing arm (21B) and is then installed in the BF through hole (21D2) of the BB connecting rod (21D); One end of the third pin shaft (21G) is installed in the AA through hole (11B) of the clamp body A support arm (11) of the clamp body (1), and the other end of the third pin shaft (21G) passes through the BI through hole (21B3) of the A swing arm (21B) and is then installed in the AC through hole (13A) of the clamp body panel (13) of the clamp body (1); One end of the fourth pin shaft (21H) is installed in the BJ through hole (21C1) of the A folding slider (21C), and the other end of the fourth pin shaft (21H) passes through the BH through hole (21B2) of the A swing arm (21B) and is then installed in the BK through hole (21C2) of the A folding slider (21C); two ends of the fourth pin shaft (21H) are respectively placed in the BJ through hole (21C1) and the BK through hole (21C2) of the A folding slider (21C), and the fourth pin shaft (21H) can move in the BH through hole (21B2) of the A swing arm (21B); The B swing arm (22B) is placed in the AB rear opening (12C) of the caliper body B support arm (12) of the caliper body (1); A B sliding cavity (22C4) on one side of the B folding slide block (22C) is used for sliding of the B swing arm protrusion (22B4) of the B swing arm (22B); One end of the fifth pin shaft (22E) is installed in the BCC through hole (22A 1) of the BC connecting rod (22A), and the other end of the fifth pin shaft (22E) passes through the BB through hole (20C) of the cross arm (20) and is installed in the BEE through hole (22D 1) of the BD connecting rod (22D); One end of the sixth pin shaft (22F) is installed and sleeved in the BDD through hole (22A2) of the BC connecting rod (22A), and the other end of the sixth pin shaft (22F) passes through the BGG through hole (22B1) of the B swing arm (22B) and is then installed in the BFF through hole (22D2) of the BD connecting rod (22D); One end of the seventh pin shaft (22G) is installed in the AB through hole (12B) of the caliper body B support arm (12) of the caliper body (1), and the other end of the seventh pin shaft (22G) passes through the BII through hole (22B3) of the B swing arm (22B) and is then installed in the AD through hole (13B) of the caliper body panel (13) of the caliper body (1); One end of the eighth pin shaft (22H) is installed in the BJJ through hole (22C1) of the B folding slider (22C), and the other end of the eighth pin shaft (22H) passes through the BHH through hole (22B2) of the B swing arm (22B) and is then installed in the BKK through hole (22C2) of the B folding slider (22C); two ends of the eighth pin shaft (22H) are respectively placed in the BJJ through hole (22C1) and the BKK through hole (22C2) of the B folding slider (22C), and the eighth pin shaft (22H) can move in the BHH through hole (22B2) of the B swing arm (22B); A blind hole (23A2) is provided on the connection seat (23A1) of the lifting slider (23A), and the blind hole (23A2) is used to place the other end of the piston rod (3B) of the piston cylinder assembly (3); the A-axis hole (23A4) of the lifting slider (23A) is used to place the ninth pin (23G1) to connect the lifting slider and the piston rod together; The support plate (23D) is provided with a support plate A support arm (23D1), a support plate B support arm (23D2), and a support plate C support arm (23D3); the backs of the support plate B support arm (23D2) and the support plate C support arm (23D3) are provided with a support plate groove (23D4), and the support plate groove (23D4) is used to accommodate the waist-shaped hole convex edge (5A) of the corner edge (5); the support plate A support arm (23D1) is provided with a B axis hole (23D11) and a C axis hole (23D 12); the support plate (23D) is driven by the piston cylinder to rotate around the eleventh pin shaft (23G3) to lift the support plate B arm (23D2) and the support plate C arm (23D3); the support plate B arm (23D2) and the support plate C arm (23D3) lifted with the corner edge (5) are conducive to inserting the two ends of the corner edge (5) into the notch of the air duct (4), and the lifting slider (23A) and the connecting rod mechanism are driven to move by the action force of the hydraulic cylinder, so that the corner edge embedding and edge pressing riveting are completed at one time; One end of the ninth pin shaft (23G1) is installed in the CA through hole (23B1) of the lifting A connecting rod (23B), and the other end of the ninth pin shaft (23G1) passes through the A axis hole (23A4) of the handle (23A3) of the lifting slider (23A) and is then installed in the CC through hole (23C1) of the lifting B connecting rod (23C); One end of the tenth pin shaft (23G2) is installed in the CB through hole (23B2) of the lifting A connecting rod (23B), and the other end of the tenth pin shaft (23G2) passes through the C axis hole (23D12) of the support plate A support arm (23D1) of the support plate (23D) and is then installed in the CD through hole (23C2) of the lifting B connecting rod (23C); One end of the eleventh pin shaft (23G3) is installed in the CE through hole (23E 1) of the lifting A support (23E), and the other end of the eleventh pin shaft (23G3) passes through the B axis hole (23D 11) of the support plate A support arm (23D 1) of the support plate (23D) and is then installed in the CF through hole (23F 1) of the lifting B support (23F); The piston rod (3B) of the piston cylinder assembly (3) is located in the middle of the cylinder (3A), a piston sleeve (3D) and a piston return spring (3E) are provided between the piston rod (3B) and the cylinder (3A), and the piston sleeve (3D) is sleeved with the piston return spring (3E) on its exterior; The center of the oil cylinder connection seat (3C) in the piston oil cylinder assembly (3) is a C center through hole (3C3), one end of a piston sleeve (3D) is installed in the C center through hole (3C3), and the other end of the piston sleeve (3D) is installed at the end of a piston rod (3B); the other end of the piston rod (3B) passes through the BA center through hole (20A) of the cross arm (20) of the connecting rod push-pull clamping assembly (2) and is installed in the blind hole (23A2) of the lifting slider (23A) of the intermediate connecting rod mechanism (23); a bottom panel (3C1) is provided on the oil cylinder connection seat (3C), one end of which is a hollow cylinder (3C2); the hollow cylinder (3C2) is connected to the mounting end of the oil cylinder (3A); the other end of the bottom panel (3C1) is fixed to the clamp body A support arm (11) and the clamp body B support arm (12) of the clamp body (1).

2. A method for performing an operation of inserting and crimping the corners of a duct using the handheld hydraulic pliers for crimping the corners of a ventilation duct as claimed in claim 1, characterized in that There are the following steps: Step 1, adjusting the hand-held hydraulic pliers and making the support plate B arm (23D2) and the support plate C arm (23D3) of the support plate (23D) tilt upward; Step 2, placing the corner edge (5) on the support arm (23D2) of the pallet and the support arm (23D3) of the pallet; Step 3, placing the clamp body (1) above the notch of the air duct (4), and making the two side surfaces of the positioning triangle block (6) stick to the inner wall of the air duct (4); Step 4, press the solenoid valve button to allow hydraulic oil to enter the oil cylinder, push the piston rod (3B) to complete the corner crimping of the air duct (4); Step 5, release the solenoid valve button to release the hydraulic oil pressure, and under the action of the piston rod (3B) returning to its original position, the moving parts on the handheld hydraulic pliers return to their initial positions.

3. The hand-held hydraulic pliers for crimping the corners of ventilation ducts according to claim 1 are characterized in that: The movement process of the upper and lower connecting rod mechanisms (21, 22) is the same, and only the movement process of the upper connecting rod mechanism (21) is described; the movement process of the upper connecting rod mechanism (21) is as follows: when the oil cylinder (3A) does not supply high-pressure oil, under the action of the piston return spring force, the piston sleeve (3D) and the piston rod (3B) move backward to the top position 3H of the oil cylinder, and the cross arm (20) moves through the upper and lower connecting rod mechanisms under the action of the auxiliary springs (3F, 3G) to realize the return of the edge pressing slider (21C). When the high-pressure oil enters the oil cylinder (3A), Afterwards, the piston rod (3B) and the piston sleeve (3D) move simultaneously. In the first stage of the movement, the cross arm (20) remains stationary. When the front panel (3D1) of the piston sleeve (3D) contacts the rear panel (20E) of the cross arm (20), the piston rod (3B) pushes the lifting slider (23A) to complete the corner lifting and embedding. After that, the piston rod (3B) no longer moves forward, while the piston sleeve (3D) continues to move under the action of the pressure oil, pushing the cross arm (20) forward, thereby driving the connecting rod mechanism to move to complete the folding and crimping action.

4. The hand-held hydraulic pliers for crimping the corners of ventilation ducts according to claim 1 are characterized in that: The movement process of the intermediate connecting rod mechanism (23) is as follows: when the oil cylinder (3A) does not supply high-pressure oil, under the action of the piston return spring force, the piston sleeve (3D) and the piston rod (3B) move backward to the top position 3H of the oil cylinder. During this process, the piston rod (3B) pulls the lifting slider (23A) back, and the support plate (23D) is opened through the movement of the intermediate connecting rod mechanism; after the support plate (23D) is opened, the corner workpiece can be placed on the support plate (23D) to prepare for the next crimping; when the high-pressure oil enters the oil cylinder (3A), the piston rod (3B) and the piston sleeve (3D) move simultaneously. In the first stage of the movement, the piston rod (3B) pushes the lifting slider (23A) to complete the corner lifting and embedding. In this stage, due to the front end panel (3D) of the piston sleeve, the corner workpiece can be placed on the support plate (23D) to prepare for the next crimping. 1) and the rear panel (20E) of the cross arm (20), and the cross arm (20) remains stationary; during the second stage of the piston movement, the piston rod (3B) remains stationary, and when the second stage of the movement is completed, the pressure oil supply of the cylinder is cut off, and the piston returns to the starting position under the action of the piston return spring.

5. The hand-held hydraulic pliers for crimping the corners of ventilation ducts according to claim 1 are characterized in that: The piston cylinder assembly (3) adopts a double piston structure of a piston rod and a piston sleeve, and can complete two processing steps of corner edge pressing and edge pressing riveting after one reciprocating motion.

6. The hand-held hydraulic pliers for crimping the corners of ventilation ducts according to claim 1, characterized in that: The hydraulic cylinder drives the lifting slider and the connecting rod mechanism to move, so that the corner edge embedding and edge crimping riveting can be completed at one time, which can improve the quality and work efficiency of the corner edge crimping of the ventilation duct.

Images