Novel car dumper car pressing oil cylinder with unloading function

Abstract

The utility model discloses a novel car tipper car pressing oil cylinder with unloading function relates to car pressing oil cylinder technical field, including piston rod and cylinder body, and the one end outside of cylinder body is open and is equipped with gland, and the gland is connected through the connecting bolt with cylinder body screw thread, be provided with multiple elastic components that are annular distribution around piston rod in the gland cavity, and the elastic component is equipped on the connecting bolt, and the piston rod is equipped with the guide sleeve, and the guide sleeve is sealed sliding contact cooperation with piston rod, cylinder body, and the one end of guide sleeve is on the elastic component, and the gland is connected with piston rod through the connecting component, and the connecting component is connected with piston rod between sliding connection cooperation. The utility model discloses with the help of multiple disc spring groups that are annular distribution around piston rod unloading, still can carry out the fine adjustment to each position's connecting bolt to reach the qualified requirement, and the disc spring group overall pre-tightening force test of car pressing oil cylinder before the factory outlet is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology for tipper machines, and in particular to a novel hydraulic cylinder for tipper machines with unloading function. Background Technology

[0002] A tippler is a large mechanical device used to unload bulk materials from open railway wagons. It is a loading and unloading machine that can tilt or overturn rail vehicles to unload materials. It is widely used in ports with high transport volumes and in industrial sectors such as metallurgy, coal, and thermal power. The tippler's pressing mechanism is the mechanical mechanism that fixes the train car body during the tippler's tilting or overturning process. The pressing cylinder is an important power component of the pressing mechanism. According to the railway standard GB / T 18818 "Technical Conditions for Testing Railway Freight Car Tipplers and Bulk Cargo Thawing Warehouses," the following requirements apply: When a tippler unloads a vehicle, the pressing beam should cover the full width of the beams on both sides of the vehicle. For a tippler with eight pressing heads, the pressing force of each pressing head should not exceed 100kN, and the pressing length of each pressing head along the longitudinal direction of the vehicle should not be less than 400mm. For tipplers with more than eight pressing heads, the pressing force of each pressing head and the length of the continuous pressing beam should be calculated according to the above data. The pressing device should use elastic elements. Therefore, the tippler's pressing cylinder design should be equipped with an unloading device. The function of the unloading device is to ensure that during the tipping process, the force exerted on the train car by each pressure head does not exceed 100 kN. For example... Figure 1 As shown, the current pressing cylinder has a spring unloading cylinder connected to the rod end. The unloading cylinder occupies a large space, and if there is a problem with the connection between it and the pressing cylinder, the cylinder will not be able to maintain pressure, which will lead to a safety accident where the train car detaches from the tipper during the tipper unloading process.

[0003] To address the aforementioned issues, the specification of existing patent document CN112901576A discloses the following: "A hydraulic cylinder 20 for pressing a vehicle includes a first cylinder 2, a second cylinder 9, a first piston 14, a second piston 6, a cylinder tail 16, and a piston rod 13… The end of the second cylinder 9 furthest from the first cylinder 2 is fixedly connected to a pressure cap 4 via a first bolt 3… A compression elastic element is provided between the second piston 6 and the pressure cap 4; the compression elastic element can extend and retract with changes in the oil pressure within the hydraulic cylinder 20, and the elastic force (preload) of the compression elastic element is greater than the pressure of the hydraulic oil when the hydraulic cylinder 20 is working (i.e., when the piston rod 13 drives the load to extend and retract). In use, when the piston…" When the tension on rod 13 increases to the preload of the compression elastic element, the compression elastic element will be compressed, causing piston rod 13 to drive piston 14 upward (outward). It should be noted that the preload of the compression elastic element can be set according to actual working needs. The compression elastic element presses the second piston 6 against the side of the second cylinder 9 closest to the first cylinder 2. The compression elastic element can buffer the movement of the second piston 6 away from the first cylinder 2 within the second cylinder 9. Simultaneously, the compression elastic element, in conjunction with the second piston 6, can adjust the volume of the cavity in the second cylinder 9, thereby changing the volume of the hydraulic cylinder 20 formed by the first cylinder 2 and the second cylinder 9. The volume is adjusted to allow the piston rod 13 to flexibly extend and retract according to changes in load position during operation (oil enters the rod chamber). The compression elastic element is a spring or disc spring 5, which is sleeved on the piston rod 13. One end of the spring or disc spring 5 abuts against the pressure cap 4, and the other end abuts against the second piston 6. In this example, the compression elastic element is a disc spring 5. The choice of disc spring 5 can increase the adjustment capacity (i.e., preload) while reducing the volume of the cylinder. (For details, please refer to the original patent document.) In this patent document, a compression elastic element is set at one end of the press cylinder, and the volume of the second cylinder is adjusted by compressing the spring or disc spring. This achieves the unloading effect by eliminating the need for a separate unloading cylinder, thus saving space. However, for cylinder manufacturers, this patented technology has a drawback: since the compression elastic element 5 is directly installed inside the second cylinder 9, and the second cylinder 9 is directly sleeved on one end of the first cylinder 2 with the pressure cap 4 only fixed to the second cylinder 9 by the first bolt 3, it means that the compression elastic element 5 can only be installed once. During the production and assembly of the press cylinder, the preload of the compression elastic element 5 must be adjusted. However, this patented technology does not have a corresponding structure for adjusting the preload of the compression elastic element 5, making it very inconvenient to adjust the preload of the press cylinder before it leaves the factory. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of tipper pressing cylinder with unloading function, which solves the problem mentioned in the background art that the comparative patent technology lacks a corresponding structure for adjusting the pre-tightening force of the compression elastic element, making the pre-tightening force adjustment process of the pressing cylinder before leaving the factory very inconvenient.

[0005] The present invention adopts the following technical solution:

[0006] This utility model discloses a novel tippler pressing cylinder with unloading function, comprising a piston rod and a cylinder body. The cylinder body has a structure with one end open and the other end closed. A piston is provided at one end of the piston rod, and the piston is slidably and sealed in the cylinder body. A pressure cap is sleeved on the outside of the open end of the cylinder body, and the pressure cap is threadedly connected to the cylinder body by connecting bolts.

[0007] The gland cavity is provided with multiple sets of elastic components arranged in a ring around the piston rod, and the elastic components are sleeved on the connecting bolts;

[0008] A guide sleeve is fitted on the piston rod. The guide sleeve is in sealed sliding contact with the piston rod and the cylinder. One end of the guide sleeve abuts against the elastic component.

[0009] The pressure cap and the piston rod are connected by a connecting assembly, and the connecting assembly and the piston rod are slidably connected.

[0010] Preferably, the guide sleeve includes a sleeve body, which is sleeved on the piston rod, and the sleeve body, the piston rod, and the cylinder are in sealed sliding contact.

[0011] The sleeve body is provided with a pressing annular boss at one end facing the outside of the cylinder body, and the pressing annular boss is provided with a plurality of second mounting holes, and the elastic component is disposed in the second mounting holes.

[0012] Preferably, the cylinder body is provided with a connecting annular boss, and the connecting annular boss is provided with a threaded hole;

[0013] The gland is fitted onto the connecting annular boss, and the connecting bolt is threadedly connected to the threaded hole.

[0014] Preferably, one end of the gland is provided with a sleeve and a plurality of first mounting holes, the first mounting holes being distributed in a ring around the sleeve;

[0015] The sleeve is fitted onto the connecting assembly, and the elastic component is installed in the first mounting hole.

[0016] Preferably, the connecting assembly includes a limiting sleeve, the outer wall of which is fixedly connected to the sleeve tube, and the inner wall of which is sleeved on the piston rod.

[0017] Preferably, the outer wall of the limiting sleeve is provided with threads, and the inner wall of the sleeve is provided with threads that mate with the outer wall of the limiting sleeve, and the sleeve and the limiting sleeve are threadedly connected together.

[0018] Preferably, the connecting assembly further includes a cover plate, the cover plate being annular, the inner peripheral wall of the cover plate being provided with a latch facing the center, the outer wall of the limiting sleeve being provided with a slot, and the latch being engaged in the slot.

[0019] The outer peripheral wall of the cover plate ring is provided with a clearance hole to avoid the connecting bolt;

[0020] The cover plate is fixedly connected to the pressure cap by bolts.

[0021] Preferably, the elastic component is a disc spring assembly.

[0022] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0023] This invention utilizes multiple sets of disc springs arranged in a ring around the piston rod for unloading. Compression of the disc springs causes the piston rod to shift to the left, increasing the volume of the rod chamber and thus achieving the unloading effect. The design allows for fine-tuning of the connecting bolts at various positions to meet requirements, facilitating the overall preload test of the disc spring assembly before the hydraulic cylinder leaves the factory. Furthermore, it features a compact structure, simple installation, convenient maintenance, and automatic horizontal load leveling. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 The front view of a conventional hydraulic cylinder for a press car, which has a separate unloading cylinder as described in the background art;

[0026] Figure 2 This is a schematic diagram of the hydraulic cylinder structure in the comparative patent technology mentioned in the background section;

[0027] Figure 3 This is a schematic diagram of the hydraulic cylinder structure of a novel tippler with unloading function. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the hydraulic cylinder structure of a novel tippler with unloading function. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the hydraulic cylinder structure of a novel tippler with unloading function. Figure 3 ;

[0030] Figure 6 This is a cross-sectional view of the guide sleeve in the hydraulic cylinder of the new tippler with unloading function of this utility model;

[0031] Figure 7 This is a side view of the guide sleeve in the hydraulic cylinder of the new tipper with unloading function according to this utility model;

[0032] Figure 8 This is a cross-sectional view of the pressure cover in the hydraulic cylinder of the new tipper with unloading function of this utility model;

[0033] Figure 9 This is a side view of the pressure cover in the hydraulic cylinder of the new tipper with unloading function according to this utility model;

[0034] Figure 10 This is a front view of the limiting pressure sleeve in the hydraulic cylinder of the new tipper with unloading function of this utility model;

[0035] Figure 11 This is a side view of the limiting pressure sleeve in the hydraulic cylinder of the new tipper with unloading function of this utility model;

[0036] Figure 12 This is a cross-sectional view of the limiting pressure sleeve in the hydraulic cylinder of the new tipper with unloading function of this utility model;

[0037] Figure 13 This is a front view of the cover plate in the hydraulic cylinder of the new tipper with unloading function of this utility model.

[0038] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 1-1. Connecting annular boss; 1-2. Threaded hole; 2. Connecting assembly; 2-1. Limiting sleeve; 2-1-1. Slot; 2-2. Cover plate; 2-2-1. Tongue; 3. Piston; 4. Pressure cap; 4-1. Sleeve tube; 4-2. First mounting hole; 5. Elastic component; 6. Connecting bolt; 7. Guide sleeve; 7-1. Sleeve body; 7-2. Pressing annular boss; 7-3. Second mounting hole; 8. Piston rod; 9. First oil inlet; 10. Second oil inlet; 11. Valve block; 12. Hydraulic check valve; 13. Connecting pipe; 14. Rod end lug. Detailed Implementation

[0039] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0040] like Figure 1As shown, this embodiment discloses a novel tippler pressing cylinder with unloading function, including a piston rod 8 and a cylinder body 1. The cylinder body 1 has a structure with one end open and the other end closed. A piston 3 is provided at one end of the piston rod 8, and the piston 3 is slidably disposed in the cylinder body 1. A rod end lug 14 is provided at the other end of the piston rod 8. A second oil inlet 10 is provided at one end of the cylinder body 1, and the second oil inlet 10 is located on the rodless chamber side of the cylinder. A first oil inlet 9 is provided on the side wall of the other end of the cylinder body 1, and the first oil inlet 9 is located on the rod chamber side of the cylinder. The first oil inlet 9 is connected to a valve block 11, and the valve block 11 is connected to the second oil inlet 10 through a connecting pipe 13. A hydraulically controlled check valve 12 is provided on the valve block 11. The valve block 11 is equipped with an A inlet and a B inlet. When hydraulic oil enters the valve block 11 through the A inlet, it flows through the internal channel of the valve block 11, through the hydraulically controlled check valve 12, and into the connecting pipe 13. Then, it enters the cylinder 1 through the second inlet 10, thereby pushing the piston 3 and piston rod 8 to move to the left. The piston rod 8 extends, and at this time, the hydraulic oil in the rod chamber of the cylinder 1 flows through the first inlet 9 into the valve block 11, then through the internal channel of the valve block 11, through the hydraulically controlled check valve 12, and then out of the valve block 11 through the B inlet. When the piston rod 8 needs to retract, the hydraulic oil enters the valve block 11 through the B inlet and then enters the rod chamber of the cylinder 1 through the first inlet 9, pushing the piston 3 and piston rod 8 to move to the right. The hydraulic oil in the rodless chamber of the cylinder 1 flows into the valve block 11 through the connecting pipe 13 and then out of the A inlet of the valve block 11.

[0041] like Figure 3 and Figure 4 As shown, in this embodiment, a pressure cap 4 is fitted onto the outer side of one open end of the cylinder body 1, and the pressure cap 4 is threadedly connected to the cylinder body 1 by a connecting bolt 6. Multiple sets of elastic components 5 are arranged in a ring around the piston rod 8 inside the pressure cap 4 cavity, and the elastic components 5 are fitted onto the connecting bolt 6. A guide sleeve 7 is fitted onto the piston rod 8, and the guide sleeve 7 has a sealed sliding contact with both the piston rod 8 and the cylinder body 1, with one end of the guide sleeve 7 abutting against the elastic components 5. The pressure cap 4 and the piston rod 8 are connected by a connecting component 2, and the connecting component 2 and the piston rod 8 are in a sliding connection fit.

[0042] like Figure 5 As shown, the guide sleeve 7 includes a sleeve body 7-1, which is sleeved on the piston rod 8. The sleeve body 7-1, the piston rod 8, and the cylinder 1 are all in sealed sliding contact, so that the sleeve body 7-1 can slide in the cylinder 1.

[0043] like Figures 5 to 9As shown, the cylinder body 1 is provided with a connecting annular boss 1-1, and the connecting annular boss 1-1 is provided with a threaded hole 1-2. The sleeve body 7-1, facing outwards from the cylinder body 1, is provided with a pressing annular boss 7-2, which is located in the cavity between the pressure cap 4 and the cylinder body 1. The pressing annular boss 7-2 is provided with multiple second mounting holes 7-3 for installing the elastic component 5. One end of the pressure cap 4 is provided with a sleeve 4-1 and multiple first mounting holes 4-2 for installing the elastic component 5. The first mounting holes 4-2 are arranged in a ring around the sleeve 4-1, and the sleeve 4-1 is fitted onto the connecting component 2.

[0044] During assembly, one end of the elastic component 5 is installed in the second mounting hole 7-3 and the other end is installed in the first mounting hole 4-2. The pressure cap 4 is fitted onto the connecting annular boss 1-1. The connecting bolt 6 passes through the pressure cap 4, the elastic component 5, and the pressing annular boss 7-2, and is threaded onto the threaded hole 1-2, so that the pressure cap 4 is relatively fixed to the cylinder body 1.

[0045] like Figure 5 , Figures 10 to 13 As shown, the connecting assembly 2 includes a limiting sleeve 2-1. The outer wall of the limiting sleeve 2-1 is fixedly connected to the sleeve tube 4-1. The inner wall of the limiting sleeve 2-1 is sleeved on the piston rod 8, and the piston rod 8 can slide inside the limiting sleeve 2-1.

[0046] The outer wall of the limiting sleeve 2-1 is provided with threads (not shown in the figure), and the inner wall of the sleeve 4-1 is provided with threads that mate with the outer wall of the limiting sleeve 2-1. The sleeve 4-1 and the limiting sleeve 2-1 are threaded together.

[0047] In this embodiment, the connecting assembly 2 further includes a cover plate 2-2, which has a circular annular structure and is fixedly connected to the pressure cap 4 by bolts. A latch 2-2-1 is provided on the inner circumferential wall of the cover plate 2-2 facing the center, and a groove 2-1-1 is provided on the outer wall of the limiting pressure sleeve 2-1. The latch 2-2-1 is fitted into the groove 2-1-1, and the design of the latch 2-2-1 and the groove 2-1-1 prevents relative rotation of the limiting pressure sleeve 2-1. Furthermore, the outer circumferential wall of the cover plate 2-2 has a clearance hole (i.e., a clearance hole) to avoid the connecting bolt 6. Figure 13 The semi-circular notch on the outer periphery of the cover plate 2-2 in the middle.

[0048] In this embodiment, the elastic component 5 is a disc spring assembly.

[0049] The unloading principle of this invention is as follows: When the hydraulic control check valve 12 on the hydraulic cylinder is locked, both the rodless chamber and the rod chamber of the cylinder 1 are filled with hydraulic oil. When the piston rod 8 is subjected to tension, the hydraulic oil in the rod chamber squeezes the guide sleeve 7, which in turn squeezes the elastic component 5, causing the elastic component 5 to be compressed. The guide sleeve 7 then displaces to the left (the displacement is the same as the compression of the elastic component 5), thereby increasing the volume of the rod chamber and increasing the extension stroke of the piston rod 8, thus achieving the unloading purpose.

[0050] The debugging principle of this utility model is as follows: One end of the elastic component 5 is installed in the second mounting hole 7-3, and the other end is installed in the first mounting hole 4-2. The pressure cap 4 is fitted onto the connecting annular boss 1-1. Then, the connecting bolt 6 is threaded through the pressure cap 4, the elastic component 5, and the pressing annular boss 7-2 in sequence and screwed onto the threaded hole 1-2 of the cylinder body 1. The preload of the elastic component 5 can be adjusted by adjusting the tightening depth of the connecting bolt 6. In this utility model, the elastic component 5 (disc spring assembly) is fitted onto the outside of the connecting bolt 6 and is distributed in a ring around the piston rod 8. The preload of the entire elastic component 5 can be adjusted by using the connecting bolt 6. The qualified requirements can be achieved by fine-tuning the tightening depth of the connecting bolt 6, which facilitates the debugging work of the hydraulic cylinder before leaving the factory.

[0051] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel tippler pressing cylinder with unloading function, comprising a piston rod (8) and a cylinder body (1), wherein the cylinder body (1) has a structure with one end open and the other end closed, and a piston (3) is provided at one end of the piston rod (8), wherein the piston (3) is slidably and sealed within the cylinder body (1), characterized in that: A pressure cap (4) is fitted on the outer side of one open end of the cylinder body (1), and the pressure cap (4) is threadedly connected to the cylinder body (1) by a connecting bolt (6); The cavity of the pressure cap (4) is provided with multiple sets of elastic components (5) arranged in a ring around the piston rod (8), and the elastic components (5) are sleeved on the connecting bolt (6); A guide sleeve (7) is fitted on the piston rod (8). The guide sleeve (7) is in sealed sliding contact with the piston rod (8) and the cylinder (1). One end of the guide sleeve (7) abuts against the elastic component (5). The pressure cap (4) and the piston rod (8) are connected by a connecting assembly (2), and the connecting assembly (2) and the piston rod (8) are slidably connected.

2. The novel tipper pressing cylinder with unloading function according to claim 1, characterized in that: The guide sleeve (7) includes a sleeve body (7-1), which is sleeved on the piston rod (8). The sleeve body (7-1), the piston rod (8), and the cylinder (1) are all in sealed sliding contact. The sleeve body (7-1) is provided with a pressing annular boss (7-2) at one end facing the outside of the cylinder (1). The pressing annular boss (7-2) is provided with a plurality of second mounting holes (7-3). The elastic component (5) is provided in the second mounting holes (7-3).

3. The novel tipper pressing cylinder with unloading function according to claim 1, characterized in that: The cylinder body (1) is provided with a connecting annular boss (1-1), and the connecting annular boss (1-1) is provided with a threaded hole (1-2). The pressure cap (4) is fitted onto the connecting annular boss (1-1), and the connecting bolt (6) is threadedly connected to the threaded hole (1-2).

4. The novel tipper pressing cylinder with unloading function according to claim 3, characterized in that: The pressure cap (4) is provided with a sleeve (4-1) and a plurality of first mounting holes (4-2) at one end, and the first mounting holes (4-2) are distributed in a ring around the sleeve (4-1); The sleeve (4-1) is sleeved on the connecting component (2), and the elastic component (5) is installed in the first mounting hole (4-2).

5. The novel tipper pressing cylinder with unloading function according to claim 4, characterized in that: The connecting assembly (2) includes a limiting sleeve (2-1), the outer wall of which is fixedly connected to the sleeve tube (4-1), and the inner wall of which is sleeved on the piston rod (8).

6. The novel tipper pressing cylinder with unloading function according to claim 5, characterized in that: The outer wall of the limiting sleeve (2-1) is provided with threads, and the inner wall of the sleeve (4-1) is provided with threads that cooperate with the outer wall of the limiting sleeve (2-1). The sleeve (4-1) and the limiting sleeve (2-1) are threaded together.

7. The novel tipper pressing cylinder with unloading function according to claim 6, characterized in that: The connecting assembly (2) further includes a cover plate (2-2), which is annular. The inner circumferential wall of the cover plate (2-2) is provided with a latch (2-2-1) facing the center. The outer wall of the limiting sleeve (2-1) is provided with a slot (2-1-1), and the latch (2-2-1) is fitted into the slot (2-1-1). The outer peripheral wall of the cover plate (2-2) is provided with a clearance hole to avoid the connecting bolt (6); The cover plate (2-2) is fixedly connected to the pressure cover (4) by bolts.

8. The novel tipper pressing cylinder with unloading function according to claim 1, characterized in that: The elastic component (5) is a disc spring assembly.

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