Tunnel furnace return line jacking structure

Abstract

The utility model relates to the technical field of tunnel furnaces, in particular to a tunnel furnace return line jacking structure which comprises a base, jacking cylinders are arranged on the two sides of the top of the base, jacking rods are movably arranged in the jacking cylinders, a bottom bracket is connected between the top ends of the jacking rods, a workpiece bracket is arranged above the bottom bracket, and the workpiece bracket is connected with the jacking cylinders. The workpiece bracket is jointly composed of a left bracket, a middle bracket and a right bracket, a positioning stud connected with the bottom of the middle bracket is inserted into the middle of the bottom bracket in a penetrating mode, a hydraulic cylinder is arranged in the middle of the top of the base, and the output end of the hydraulic cylinder is connected with a push rod; and the two ends of the pushing rod extend into the jacking cylinder and are fixedly connected with the bottom end of the jacking rod. According to the tunnel furnace return line jacking structure, by introducing the adjustable jacking module and the enhanced supporting structure, the tunnel furnace return line jacking structure can adapt to a wider height change range, and the stability and firmness of a workpiece can be kept in the jacking process.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel furnaces, in particular to a return line lifting structure of a tunnel furnace. Background Art

[0002] With the continuous improvement of industrial automation level, tunnel furnaces have been widely used in various industrial production lines. Tunnel furnaces are mainly used for continuous heating and processing of workpieces to meet the needs of different process flows. In these production lines, workpieces often need to go through different processes, and sometimes they encounter equipment connections at different heights, which requires an effective lifting mechanism to ensure that the workpieces can smoothly transition between different heights.

[0003] The existing jacking structure for tunnel furnaces has certain limitations in adaptability and stability. First of all, the traditional jacking mechanism can only adapt to specific height changes. When there is a large height difference between different equipment in the production line or a large change in the size of the workpiece, the jacking operation may not be performed effectively. In addition, most jacking devices are not designed to fully consider the stability of the workpiece during the jacking process, and are prone to shaking or tilting, which not only affects the quality of the workpiece, but may also cause damage to the equipment. Therefore, designing a jacking structure with better adaptability and higher stability is of great significance to improving the overall efficiency and reliability of the production line. Utility Model Content

[0004] The utility model aims to provide a tunnel furnace return line jacking structure to solve the problems of poor adaptability and insufficient stability of the current tunnel furnace jacking mechanism proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tunnel furnace return line jacking structure, including a base, jacking cylinders are provided on both sides of the top of the base, jacking rods are movably provided inside the jacking cylinders, and a bottom bracket is connected between the tops of the jacking rods, a workpiece bracket is provided above the bottom bracket, the workpiece bracket is composed of a left bracket, a middle bracket and a right bracket, and a positioning stud connected to the bottom of the middle bracket is inserted in the middle of the bottom bracket, and a hydraulic cylinder is provided in the middle of the top of the base, and a push rod is connected to the output end of the hydraulic cylinder, and both ends of the push rod extend into the interior of the jacking cylinder and are fixedly connected to the bottom end of the jacking rod.

[0006] Preferably, one side corresponding to the left bracket and the right bracket is provided with a movable groove matched with the middle bracket structure, and the front and rear ends of the one side corresponding to the left bracket and the right bracket are connected with locking bolts through a threaded structure.

[0007] Preferably, fixture racks are symmetrically provided at the tops of the left bracket and the right bracket, pneumatic pressing blocks are provided inside the fixture racks, and air cylinders for driving the pneumatic pressing blocks to move are provided outside the fixture racks.

[0008] Preferably, support rods are movably provided on both sides of the top of the bottom bracket, and docking blocks connected to the outer ends of the support rods are provided at the bottoms of the left bracket and the right bracket.

[0009] Preferably, the positioning stud is inserted through the middle of the bottom bracket by a threaded sleeve, and a threaded interface matching the structure of the top end of the positioning stud is provided in the middle of the bottom of the middle bracket.

[0010] Preferably, vertical openings are provided on the corresponding sides of the lifting cylinders, and the ends of the push rods movably penetrate through the vertical openings on the lifting cylinders.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: By introducing an adjustable lifting module and an enhanced support structure, the lifting structure of the tunnel furnace return line can not only adapt to a wider range of height changes, but also keep the workpiece stable and firm during the lifting process. Through the mutual cooperation of the hydraulic cylinder, the push rod, the lifting rod and the lifting cylinder, and combined with the pre-adjustment function of the positioning stud, the workpiece bracket can flexibly adapt to different workpiece sizes and production line height differences. Moreover, the workpiece bracket with an expandable design composed of a left bracket, a middle bracket and a right bracket further enhances the support ability for different types of workpieces. At the same time, the pneumatic pressing block on the fixture rack is driven by an air cylinder to provide a reliable workpiece clamping force, effectively preventing the workpiece from shaking or tilting during the lifting process. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of a lifting structure of a tunnel furnace return line according to the present utility model;

[0013] Figure 2 is a schematic connection structural diagram of the lifting rod and the lifting cylinder of a lifting structure of a tunnel furnace return line according to the present utility model;

[0014] Figure 3 is a schematic top view structural diagram of a workpiece bracket of a lifting structure of a tunnel furnace return line according to the present utility model;

[0015] Figure 4 is a schematic connection structural diagram of the support rod and the docking block of a lifting structure of a tunnel furnace return line according to the present utility model.

[0016] In the figure: 1, base; 2, jacking cylinder; 3, jacking rod; 4, bottom bracket; 5, workpiece bracket; 51, left bracket; 52, middle bracket; 53, right bracket; 6, fixture rack; 61, pneumatic pressing block; 62, cylinder; 7, push rod; 8, hydraulic cylinder; 9, positioning stud; 10, support rod; 11, docking block. Detailed implementation manner

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0018] Please refer to Figures 1-4, the present utility model provides a technical solution: a lifting structure for a return line of a tunnel furnace, which includes a base 1. Installation holes are provided at the four corners of the base 1 for fixed installation at a suitable position near the return line inside the tunnel furnace. On both sides of the top of the base 1, there are lifting cylinders 2. The connection between the bottom end of the lifting cylinder 2 and the base 1 is fixed by welding. A lifting rod 3 is movably arranged inside the lifting cylinder 2, and a bottom bracket 4 is connected between the tops of the lifting rods 3. Above the bottom bracket 4, there is a workpiece bracket 5. The workpiece bracket 5 is jointly composed of a left bracket 51, a middle bracket 52, and a right bracket 53. A positioning stud 9 connected to the bottom of the middle bracket 52 is inserted through the middle of the bottom bracket 4. And in the middle of the top of the base 1, a hydraulic cylinder 8 is fixedly installed through a fixing bolt. The output end of the hydraulic cylinder 8 is fixedly connected to a push rod 7. Both ends of the push rod 7 extend into the inside of the lifting cylinder 2 and are fixedly connected to the bottom ends of the lifting rods 3. On the tops of both the left bracket 51 and the right bracket 53, there are symmetrically arranged fixture brackets 6. The fixture brackets 6 are connected to the connection parts at the tops of the left bracket 51 and the right bracket 53 through linear guides. And inside the fixture brackets 6, there are pneumatic pressing blocks 61. And on the outside of the fixture brackets 6, a cylinder 62 for driving the pneumatic pressing block 61 to move is fixed by screws. The output end of the cylinder 62 is fixedly connected to the back side of the pneumatic pressing block 61. In this structure, the hydraulic cylinder 8 drives the push rod 7 to lift and lower on the base 1. The push rod 7 drives the two lifting rods 3 to slide in the lifting cylinders 2. When the lifting rods 3 lift and lower synchronously, the workpiece bracket 5 can be lifted through the bottom bracket 4. And the distance between the bottom bracket 4 and the workpiece bracket 5 can be pre-adjusted through the positioning stud 9, with stronger adaptability, capable of coping with the height difference changes between different equipment in the production line or the changes in workpiece sizes. And the workpiece bracket 5 can extend on both sides of the middle bracket 52 through the left bracket 51 and the right bracket 53, expanding the support range and further improving the applicability. At the same time, the pneumatic pressing block 61 on the fixture bracket 6 realizes the firm clamping of the workpiece under the drive of the cylinder 62, reducing the vibration and displacement of the workpiece during the lifting process, solving the problems of poor adaptability and insufficient stability of the traditional lifting mechanism, improving the reliability of the lifting and the continuous operation ability of the production line. On the corresponding sides of the left bracket 51 and the right bracket 53, there are movable grooves matching the structure of the middle bracket 52. And at the front and rear ends of the corresponding sides of the left bracket 51 and the right bracket 53, there are locking bolts connected through a threaded structure. In this structure, both the left bracket 51 and the right bracket 53 can extend and move on both sides of the middle bracket 52 through the movable grooves, and are limited by the locking bolts on the left bracket 51 and the right bracket 53, so as to control the relative distance between the left bracket 51 and the right bracket 53 and the middle bracket 52, and further adjust the effective support width of the entire workpiece bracket 5 according to the specific size of the workpiece. On both sides of the top of the bottom bracket 4, there are support rods 10 movably arranged through hinge pieces. And at the bottoms of both the left bracket 51 and the right bracket 53, there are also docking blocks 11 connected to the outer ends of the support rods 10 through hinge pieces. The docking block 11 is of a U-shaped structure. In this structure, when the bottom bracket 4 is lifted to a suitable height position,The support rod 10 can be tilted by rotation so that its top end is connected to the docking block 11 and fixed with screws. In this way, the support rod 10 can provide additional support force and play an auxiliary support role, ensuring the overall stability and balance of the workpiece bracket 5. The positioning stud 9 is inserted through the middle of the bottom bracket 4 through a threaded sleeve, and a threaded interface that matches the top structure of the positioning stud 9 is provided in the middle of the bottom of the middle bracket 52. With this structure, the user can rotate the positioning stud 9 and dock it with the threaded interface at the bottom of the middle bracket 52 to finely adjust the height position of the middle bracket 52 relative to the bottom bracket 4, ensuring that the workpiece bracket 5 can accurately adapt to the height differences of workpieces with different height requirements or between production line equipment. Vertical openings are provided on the corresponding sides of the lifting cylinders 2, and the ends of the push rods 7 are movably inserted through the vertical openings on the lifting cylinders 2. This structure enables the push rods 7 to perform smooth linear motion along the vertical openings under the driving force of the hydraulic cylinders 8, ensuring that the push rods 7 will not deviate horizontally during the lifting process, thereby ensuring the stability of the lifting rods 3 moving up and down inside the lifting cylinders 2.,

[0019] Working principle: When using the lifting structure of the tunnel furnace return line, first fix it at a position near the return line in the tunnel furnace through the mounting holes on the base 1, and then pre-rotate the positioning stud 9 to adjust the height position of the middle bracket 52 relative to the bottom bracket 4 until the bottom bracket 4 and the workpiece bracket 5 are adjusted to an appropriate distance. Then, the left bracket 51 and the right bracket 53 of the workpiece bracket 5 can extend on both sides of the middle bracket 52 through the movable slots and be limited by the locking bolts to adjust the effective support width of the entire workpiece bracket 5. At this time, when lifting is required, the hydraulic cylinder 8 drives the push rod 7 to lift and lower. The push rod 7 drives the lifting rod 3 to slide inside the lifting cylinder 2. When the lifting rod 3 rises, it jacks up the workpiece bracket 5 through the bottom bracket 4. When the bottom bracket 4 is jacked up to an appropriate height, the support rod 10 provides additional support force by connecting and fixing its top end to the docking block 11. At the same time, the pneumatic pressing block 61 on the fixture rack 6 firmly clamps the workpiece under the drive of the cylinder 62, thus completing a series of operations.,

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.,

Claims

1. A tunnel furnace return line lifting structure, comprising a base (1), characterized in that: A lifting cylinder (2) is provided on both sides of the top of the base (1), a lifting rod (3) is movably provided inside the lifting cylinder (2), and a bottom bracket (4) is connected between the top ends of the lifting rods (3), and a workpiece bracket (5) is provided above the bottom bracket (4), and the workpiece bracket (5) is composed of a left bracket (51), a middle bracket (52) and a right bracket (53), and a positioning stud (9) connected to the bottom of the middle bracket (52) is inserted in the middle of the bottom bracket (4), and a hydraulic cylinder (8) is provided in the middle of the top of the base (1), and a push rod (7) is connected to the output end of the hydraulic cylinder (8), and both ends of the push rod (7) extend into the interior of the lifting cylinder (2) and are fixedly connected to the bottom end of the lifting rod (3).

2. The tunnel furnace return line lifting structure according to claim 1, characterized in that: The corresponding sides of the left bracket (51) and the right bracket (53) are each provided with a movable groove matched with the structure of the middle bracket (52), and the front and rear ends of the corresponding sides of the left bracket (51) and the right bracket (53) are each connected with a locking bolt via a threaded structure.

3. The tunnel furnace return line lifting structure according to claim 1, characterized in that: A clamp frame (6) is symmetrically provided on the top of the left bracket (51) and the right bracket (53), and a pneumatic pressing block (61) is provided on the inner side of the clamp frame (6), and a cylinder (62) for driving the pneumatic pressing block (61) is provided on the outer side of the clamp frame (6).

4. The tunnel furnace return line lifting structure according to claim 1, characterized in that: Support rods (10) are movably provided on both sides of the top of the bottom bracket (4), and docking blocks (11) connected to the outer ends of the support rods (10) are provided at the bottoms of the left bracket (51) and the right bracket (53).

5. The tunnel furnace return line lifting structure according to claim 1, characterized in that: The positioning stud (9) is inserted into the middle of the bottom bracket (4) via a threaded sleeve, and a threaded interface that matches the top structure of the positioning stud (9) is provided in the middle of the bottom of the middle bracket (52).

6. The tunnel furnace return line lifting structure according to claim 1, characterized in that: A vertical opening is provided on each corresponding side of the lifting cylinder (2), and the end of the push rod (7) is movably inserted into the vertical opening on the lifting cylinder (2).

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