A punch die structure of a dolly frame

Abstract

The application discloses a punching die structure of a carrier frame, which comprises a punching piece and a fixing base, and symmetrical holding assemblies are arranged on the fixing base. The holding assembly comprises a holding base and a holding piece, a pressing end and a rotating end are arranged on the holding piece, the pressing end and the rotating end are oppositely arranged at two ends of the holding piece, a C-shaped port is arranged on the rotating end, and the C-shaped port is matched with the rotating part. The punching die structure of the carrier frame is provided with the symmetrical holding assemblies on the fixing base, and a positioning plate is arranged on the punching piece, so that the holding assemblies can press and position the carrier frame, thereby limiting the position of the carrier frame. When the positioning plate is not separated from the holding arm, the holding piece is in a state of being unable to rotate, thereby blocking the phenomenon that the carrier frame moves upward along with the punching piece, the movement of the carrier frame can be effectively avoided, the service life of the fixing base is prolonged, and meanwhile, the external carrier frame is ensured to be not damaged.

Description

Technical Field

[0001] This invention relates to punching technology, and more particularly to a punching die structure for a transport vehicle frame. Background Technology

[0002] A through-hole is provided on the frame of the transport vehicle. This observation hole is an important structural design feature, primarily used to observe the operating status of the wheels and related components inside the frame, facilitating routine inspections, maintenance, and troubleshooting. The design of this observation hole allows maintenance personnel to directly observe crucial information such as wheel wear, the presence of cracks or abnormal wear, and the tightness of the wheel-crankshaft connection without disassembling the entire frame.

[0003] The pallet truck's frame structure is relatively large, and during stamping, it requires large stamping dies for punching. These punching dies differ significantly from stamping dies in structure and stamping method. The punching die is essentially a tooling structure used to position the workpiece requiring punching; its forming structure is relatively simple, requiring only a punch head to complete the punching. However, due to the large size of the pallet truck frame, an interference fit occurs between the punch block and the punched area of ​​the frame after punching. This causes the frame to move upwards with the punch block, and then naturally fall back down under gravity, potentially impacting the mounting base and damaging both the mounting base and the workpiece. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention proposes a punching die structure for a transport vehicle frame.

[0005] A punching die structure for a transport vehicle frame includes:

[0006] A punched part, wherein a punched block and symmetrically arranged positioning plates are provided on the bottom surface of the punched part;

[0007] A fixing seat is provided at the lower end of the punched part. The fixing seat has a blanking hole that cooperates with the punching block and a positioning groove that cooperates with the positioning plate. A positioning protrusion is formed in the middle of the fixing seat. The blanking hole is located in the middle of the positioning protrusion. A positioning groove is formed around the positioning protrusion. There are symmetrically arranged mounting grooves on both sides of the positioning protrusion. A retaining component is provided in the mounting groove. The retaining component is installed on the fixing seat by bolts. The retaining component is used to limit the position of the frame and prevent the frame from moving upward with the punching block after being punched, which would cause the frame to move upward and damage the fixing seat.

[0008] The retaining component includes:

[0009] A retaining seat is bolted into a mounting groove. The retaining seat has a rotating part and a retaining arm. The rotating part is connected to the retaining seat through a connecting part. The retaining arm consists of a contact section, an arc-shaped section, and an inclined section. The arc-shaped section cooperates with a positioning plate for limiting movement.

[0010] A retainer is mounted on a retaining seat. The retainer has a pressure end and a rotating end, which are respectively arranged opposite to each other at both ends of the retainer. The rotating end has a C-shaped opening, which is fitted with a rotating part.

[0011] In this invention, the retaining seat is provided with a support portion, and an movable gap is formed between the support portion and the pressure end.

[0012] In this invention, the retaining seat is provided with a recessed groove, and the retaining member is provided with a pressure-applying protrusion that cooperates with the recessed groove. The pressure-applying protrusion is placed in the recessed groove under force.

[0013] In this invention, the lower end of the connecting part forms a clearance opening, and the rotating end is provided with a blocking extension that cooperates with the clearance opening.

[0014] In this invention, a reinforcing member is provided in the middle of the retaining arm, and the reinforcing member is disposed within the contact section and the arc-shaped section.

[0015] In this invention, the rotating end is provided with a contact arc surface, which slides in cooperation with the contact segment.

[0016] In this invention, a limiting extension is provided on the contact arc surface, which is used to limit the rotation angle of the retaining member.

[0017] In this invention, a limiting opening is provided between the contact arc surface and the limiting extension, and the limiting opening is used to cooperate with the contact segment.

[0018] In this invention, the height between the bottom surface of the punch block and the upper surface of the frame is H1, and the distance between the bottom surface of the positioning plate and the upper surface of the punch is H2, where H1 < H2.

[0019] The punching die structure for the transport vehicle frame of this invention has the following advantages: By setting symmetrical retaining components on the fixed base and a positioning plate on the punched part, the punching die structure enables the retaining components to apply pressure and position the frame, thereby limiting the frame's position. Furthermore, when the positioning plate is not disengaged from the retaining arm, the retaining component remains in a non-rotating state, preventing the frame from moving upwards with the punched part. This effectively avoids frame movement, extends the service life of the fixed base, and ensures that the frame's exterior is not damaged. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the punching die structure for the transport vehicle frame of the present invention;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 for Figure 1 Exploded view;

[0023] Figure 4 for Figure 3 A schematic diagram of the punched part structure;

[0024] Figure 5 for Figure 3 A schematic diagram of the fixed base structure;

[0025] Figure 6 for Figure 3 A schematic diagram of the retainer structure in the middle;

[0026] Figure 7 for Figure 6 Cross-sectional view;

[0027] Figure 8 for Figure 3 A schematic diagram of the retainer structure in the middle;

[0028] Figure 9 for Figure 8 Cross-sectional view;

[0029] Figure 10 A schematic diagram of the unclosed mold state where the value is 1;

[0030] Figure 11 This is a schematic diagram of the open state of the retaining component structure in this invention;

[0031] Figure 12 for Figure 1 The main perspective view.

[0032] In the diagram: 1. Punching part; 2. Fixing seat; 3. Punching block; 4. Positioning plate; 5. Frame; 6. Holding part; 7. Holding arm; 8. Rotating part; 9. Guide slope; 10. Limiting port; 11. Drop hole; 12. Positioning groove; 13. Positioning protrusion; 14. Positioning groove; 15. Mounting groove; 16. Holding assembly; 17. Holding seat; 18. Bolt; 19. Connecting part; 20. Contact section; 21. Arc section; 22. Inclined section; 23. Support part; 24. Pressure end; 25. Recessed groove; 26. Pressure protrusion; 27. Clearance opening; 28. Rotating end; 29. ​​Blocking extension; 30. Reinforcing part; 31. C-shaped opening; 32. Contact arc surface; 33. Limiting extension; 34. Pulling part; 35. Movement gap. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] like Figures 1 to 12 As shown, the punching die structure of this transport vehicle frame of the present invention includes a punching part 1 and a fixing seat 2. The punching part 1 is connected to a pressure applying mechanism, which can be a hydraulic press or other existing technology structures, which will not be described in detail here. The fixing seat 2 is used to support the workpiece that needs to be punched, and at the same time cooperates with the retaining component 16 to restrict the position of the frame 5.

[0035] Since the punching die and the stamping die have fixed structures, their positioning methods are also different. The stamping die uses a positioning plate 4 in conjunction with a spring, while the punching die only needs to punch holes, so it does not need to be equipped with a positioning plate 4 and a spring. Other structures that make up the punching die are existing technologies and will not be described in this application, such as the worktable for supporting the fixed base 2 and the load-bearing mechanism for supporting the frame 5.

[0036] A punching block 3 and symmetrically arranged positioning plates 4 are provided on the bottom surface of the punched part 1. The punching block 3 is used to apply pressure to the frame 5 to complete the punching. The positioning plate 4 is used to realize the pressure positioning of the punched part 1, and together with the retaining member 6, it ensures that the retaining arm 7 on the retaining member 6 will not move, thereby preventing the retaining member 6 from rotating around the rotating part 8, so that the retaining member 6 will not have a position. Thus, the position of the frame 5 can be limited by the retaining member 6, so that it will not move upward with the punching block 3.

[0037] A guide slope 9 is provided at the lower end of the positioning plate 4. The guide slope 9 is used to push the retaining arm 7 and prevent the retaining arm 7 from moving out of the limiting port 10 when the positioning plate 4 moves down. The guide slope 9 can slightly push the position of the retaining arm 7 to limit the position of the retaining arm 7, thereby preventing the retaining member 6 from becoming loose.

[0038] The fixing seat 2 is located at the lower end of the punching part 1. The fixing seat 2 is provided with a blanking hole 11 that cooperates with the punching block 3 and a positioning groove 12 that cooperates with the positioning plate 4. As the punching part 1 moves down, the positioning plate 4 enters the positioning groove 12.

[0039] A positioning protrusion 13 is formed in the middle of the fixed seat 2. The positioning protrusion 13 cooperates with the middle of the frame 5, so that the frame 5 is placed on the positioning protrusion 13 to achieve positioning of the frame 5.

[0040] The blanking hole 11 is located in the middle of the positioning protrusion 13, and a positioning groove 14 is formed around the positioning protrusion 13. The two sides of the positioning protrusion 13 are provided with symmetrically arranged mounting grooves 15. A retaining component 16 is provided in the mounting groove 15. The retaining component 16 is installed on the fixed seat 2 by bolts 18. The retaining component 16 is used to limit the position of the frame 5 and prevent the frame 5 from moving upward along with the punching block 3 after being punched, which would cause the frame 5 to move upward and damage the fixed seat 2.

[0041] The retaining assembly 16 includes a retaining seat 17 and a retaining member 6. The retaining member 6 is hinged to the retaining seat 17 and is rotatable. The retaining seat 17 is mounted on the fixed seat 2 by bolts 18.

[0042] The retaining seat 17 is installed in the mounting groove 15 by bolts 18. The retaining seat 17 is provided with a rotating part 8 and a retaining arm 7. The rotating part 8 is connected to the retaining seat 17 by a connecting part 19. The retaining arm 7 is composed of a contact section 20, an arc section 21 and an inclined section 22. The arc section 21 cooperates with the positioning plate 4 to limit the movement.

[0043] The retaining seat 17 is provided with a support part 23, and an movable gap 35 is formed between the support part 23 and the pressure end 24, so that the retaining member 6 can be directly placed on the frame 5 to apply pressure and position the frame 5, while preventing the retaining member 6 from applying force to the retaining seat 17.

[0044] The retaining seat 17 is provided with a recessed groove 25, and the retaining member 6 is provided with a pressure-applying protrusion 26 that mates with the recessed groove 25. The pressure-applying protrusion 26 is placed in the recessed groove 25 under force. The recessed groove 25 is used to support the pressure-applying protrusion 26, so that the pressure-applying protrusion 26 can support the retaining seat 17.

[0045] The retainer 17 can be made of hard rubber material, but the inclined section 22 on the retainer arm 7 is made of soft rubber material. The retainer 17 as a whole can be slightly deformed under force, while the inclined section 22 can facilitate the retainer arm 7 to reach the limit port 10 from the contact arc surface 32.

[0046] The lower end of the connecting part 19 forms a relief opening 27, and the rotating end 28 is provided with a blocking extension 29 that cooperates with the relief opening 27, which can facilitate the rotation of the rotating end 28.

[0047] A reinforcing member 30 is provided in the middle of the retaining arm 7. The reinforcing member 30 is located in the contact section 20 and the arc section 21. The reinforcing member 30 can prevent the contact section 20 and the arc section 21 on the retaining arm 7 from displacement. The arc section 21 is in contact with the positioning plate 4. Therefore, the distance between the retaining member 6 and the positioning plate 4 can be stabilized by the reinforcing member 30, and the rotation of the retaining member 6 can be restricted, thereby ensuring that the frame 5 will not move upward with the punched part 1.

[0048] The retainer 6 is mounted on the retainer 17. The retainer 6 is provided with a pressure end 24 and a rotating end 28. The pressure end 24 and the rotating end 28 are respectively arranged opposite to each other at both ends of the retainer 6. The rotating end 28 is provided with a C-shaped opening 31, which is installed in conjunction with the rotating part 8.

[0049] The rotating end 28 is provided with a contact arc surface 32, which slides in cooperation with the contact section 20. When the contact section 20 is on the contact arc surface 32, the contact section 20 can slide on the contact arc surface 32, which facilitates the retainer 6 to rotate around the rotating part 8, and then the limiting extension 33 is placed on the retaining seat 17 to limit the rotation angle of the retainer 6.

[0050] A limiting extension 33 is provided on the contact arc surface 32, which is used to limit the rotation angle of the retaining member 6.

[0051] A limiting opening 10 is provided between the contact arc surface 32 and the limiting extension 33. The limiting opening 10 is used to cooperate with the contact section 20. When the contact section 20 is placed in the limiting opening 10, the contact section 20 can restrict the retaining member 6, thereby limiting the distance between the retaining member 6 and the positioning plate 4 through the reinforcing member 30, and limiting the rotation of the retaining member 6. Furthermore, the inclined section 22 can be stretched under force. When the positioning plate 4 moves upward with the punched part 1, the retaining arm 7 can be pushed by the pulling part 34 provided at the upper end of the contact section 20, thereby moving the contact section 20 out of or into the limiting opening 10.

[0052] like Figure 12 As shown, the height between the bottom surface of the punch block 3 and the upper surface of the frame 5 is H1, and the distance between the bottom surface of the positioning plate 4 and the upper surface of the punched part 1 is H2, where H1 < H2. After the punch block 3 moves out of the punched hole, the positioning plate 4 is still in the positioning groove 12, and the arc segment 21 continues to contact the positioning plate 4, blocking the rotation of the retaining member 6. This allows the positioning plate 4 to continue restricting the rotation of the retaining member 6. As a result, when the punch block 3 moves upward, the frame 5 will move upward along with the punch block 3, while the retaining member 6 will be limited by the reinforcing member 30, preventing the retaining member 6 from rotating around the rotating part 8, thus limiting the position of the retaining member 6. The retaining arm 7 in the figure is not placed in the limiting opening 10, but it needs to be placed in the limiting opening 10 during punching. The figure only shows one state of the retaining arm 7, not its actual state during punching.

[0053] like Figure 11As shown, the retaining arm 7 is outside the limiting port 10 at this time, and the retaining member 6 is in the open state, allowing the frame 5 to be taken out or put in. The retaining member 6 pushes the retaining arm 7 on the contact arc surface 32, causing the inclined section 22 on the retaining arm 7 to move downwards. The limiting extension 33 is directly placed on the retaining seat 17 to support the retaining member 6, preventing it from continuing to rotate and restricting the position of the retaining member 6.

[0054] During operation, the retaining member 6 is pushed, causing it to rotate around the rotating part 8. This pushes the retaining arm 7, and the limiting extension 33 is placed on the retaining seat 17, while the blocking extension 29 enters the clearance opening 27. Then, the frame 5 to be punched is placed on the positioning protrusion 13, and the retaining member 6 is reset. The pulling part 34 is then pulled, causing the inclined section 22 on the retaining arm 7 to deform, and the retaining contact section 20 enters the limiting opening 10. The reinforcing member 30 inside the retaining arm 7 blocks the rotation of the retaining member 6. At this time, after the punching part 1 moves downward, the punching block 3 can punch the frame 5. The positioning plate 4 enters the positioning groove 12, and the positioning plate 4 limits the reinforcing member 30, restricting the distance between the positioning plate 4 and the retaining member 6, preventing the rotation of the retaining member 6, and thus limiting the upward movement of the frame 5 with the stamping block.

[0055] After punching is completed, pull the puller so that the contact section 20 moves out of the limit port 10, and then push the retainer 6 so that the retainer 6 rotates around the rotating part 8. Open the retainer 6 and take out the frame 5.

[0056] 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 within the protection scope of the present invention.

Claims

1. A punch die structure for a dolly frame, characterized by, include: A punched part, wherein a punched block and symmetrically arranged positioning plates are provided on the bottom surface of the punched part; A fixing seat is provided at the lower end of the punched part. The fixing seat has a blanking hole that cooperates with the punching block and a positioning groove that cooperates with the positioning plate. A positioning protrusion is formed in the middle of the fixing seat. The blanking hole is located in the middle of the positioning protrusion. A positioning groove is formed around the positioning protrusion. There are symmetrically arranged mounting grooves on both sides of the positioning protrusion. A retaining component is provided in the mounting groove. The retaining component is installed on the fixing seat by bolts. The retaining component is used to limit the position of the frame and prevent the frame from moving upward with the punching block after being punched, which would cause the frame to move upward and damage the fixing seat. The retaining component includes: A retaining seat is bolted into a mounting groove. The retaining seat has a rotating part and a retaining arm. The rotating part is connected to the retaining seat through a connecting part. The retaining arm consists of a contact section, an arc-shaped section, and an inclined section. The arc-shaped section cooperates with a positioning plate for limiting movement. A retainer is mounted on a retaining seat. The retainer has a pressure end and a rotating end, which are respectively arranged opposite to each other at both ends of the retainer. The rotating end has a C-shaped opening, which is fitted with a rotating part.

2. The punching die structure for the transport vehicle frame according to claim 1, characterized in that, The retaining seat is provided with a support part, and an movable gap is formed between the support part and the pressure end.

3. The punching die structure for the transport vehicle frame according to claim 1, characterized in that, The retaining seat is provided with a recessed groove, and the retaining member is provided with a pressure-applying protrusion that cooperates with the recessed groove. The pressure-applying protrusion is placed in the recessed groove under force.

4. The punching die structure for the transport vehicle frame according to claim 1, characterized in that, The lower end of the connecting part forms a clearance opening, and the rotating end is provided with a blocking extension that cooperates with the clearance opening.

5. The punching die structure for the transport vehicle frame according to claim 1, characterized in that, The retaining arm has a reinforcing member in the middle, which is disposed within the contact section and the arc-shaped section.

6. The punching die structure for the transport vehicle frame according to claim 1, characterized in that, The rotating end is provided with a contact arc surface, which slides in cooperation with the contact section.

7. The punching die structure for the transport vehicle frame according to claim 6, characterized in that, A limiting extension is provided on the contact arc surface, which is used to limit the rotation angle of the retainer.

8. The punching die structure for the transport vehicle frame according to claim 7, characterized in that, A limiting opening is provided between the contact arc surface and the limiting extension, and the limiting opening is used to cooperate with the contact segment.

9. The punching die structure for the transport vehicle frame according to claim 1, characterized in that, The height between the bottom surface of the punched block and the upper surface of the frame is H1, and the distance between the bottom surface of the positioning plate and the upper surface of the punched part is H2, where H1 < H2.

Images