Cylinder driven chain dragger

Abstract

The present invention belongs to the technical field of dragging machines, and specifically relates to a chain-type dragging machine driven by a horizontal oil cylinder, comprising a chain and a telescopic mechanism; the center of the piston rod of the telescopic mechanism is set as a hollow cavity, the end of the piston rod is connected with a tension lock, the chain passes through the hollow cavity of the piston rod and the tension lock, the tension lock locks or loosens the chain, and the chain moves with the movement of the piston rod. The chain-type dragging machine of the present invention has a small size, strong pulling force, can realize long-distance dragging, has a simple structure, and is easy to use.

Description

Technical Field

[0001] The invention belongs to the technical field of dragging machines, and in particular relates to a chain-type dragging machine driven by a horizontal oil cylinder. Background Art

[0002] The towing mechanism in the existing mechanical equipment mostly uses electricity as the power source of the entire towing mechanism, towing the equipment to move in a horizontal straight line. This towing mechanism has a large structure, is inconvenient to assemble, and is not suitable for special work locations such as ships or underground. In addition to electricity, there are also hydraulic cylinders used as the power source of the towing mechanism. Since the hydraulic cylinder can move back and forth, the reciprocating motion of the hydraulic cylinder can be used to drag heavy objects or other functions related to the reciprocating motion of the cylinder. However, due to the limited length of the existing cylinders on the market, long-distance towing cannot be achieved, resulting in limited use of the towing mechanism. Summary of the invention

[0003] In view of the defects of the prior art mentioned above, the object of the present invention is to provide a horizontal chain dragging machine with a simple structure and easy operation, which can realize long-distance dragging movement.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a chain-type dragging machine driven by an oil cylinder, including a chain and a telescopic mechanism; the center of the piston rod of the telescopic mechanism is set as a hollow cavity, and the end of the piston rod is connected to a tensioning lock, the chain passes through the hollow cavity of the piston rod and the tensioning lock, and the tensioning lock locks or loosens the chain, so that the chain moves with the movement of the piston rod.

[0005] Furthermore, the tensioning lock head includes a lock sleeve and a wedge-shaped lock core arranged on the inner wall of the lock sleeve, the lock sleeve is connected to the end of the piston rod, the inner diameter of the lock sleeve and the outer diameter of the wedge-shaped lock core are slidingly connected along the wedge surface, the inner diameter of the wedge-shaped lock core is connected to the hollow cavity of the piston rod, and the chain passes through the hollow cavity of the piston rod and the inner diameter of the wedge-shaped lock core.

[0006] Preferably, the locking sleeve is threadedly connected to the end of the piston rod.

[0007] Furthermore, a baffle is provided at one end of the tensioning lock head away from the piston rod, a C-shaped groove is provided at the inner diameter of the lock sleeve, a retaining spring is provided in the C-shaped groove, the baffle is connected to the inner diameter of the lock sleeve through the retaining spring, the retaining spring is used to limit and fix the baffle, a spring is provided between the end face of the baffle and the wedge-shaped lock core, and the chain passes through the baffle and extends outside the baffle.

[0008] Based on the above technical solution, in the initial state, the spring is in a slightly compressed state, providing pre-tightening force for the lock sleeve and the wedge-shaped lock core. The baffle is provided with a cross slot, which cooperates with the chain to facilitate the chain to pass through the baffle.

[0009] Furthermore, the wedge-shaped lock core is formed by four parts, the angle of each part of the wedge-shaped lock core is 90°, and there is a gap between each part of the wedge-shaped lock core; the outer diameter of the wedge-shaped lock core includes a wedge-shaped portion and an annular portion, the size of the wedge-shaped portion increases from the end close to the piston rod to the end away from the piston rod, and the large outer diameter end of the wedge-shaped portion transitions to the annular portion; the inner diameter of the wedge-shaped lock core matches the chain.

[0010] Preferably, a sealing ring is provided between the annular portion of the wedge-shaped lock core and the lock sleeve.

[0011] Furthermore, a slide groove is provided on the lock sleeve, and a connecting bolt is provided in the slide groove and is slidably connected to the slide groove, and the connecting bolt passes through the slide groove and is connected to the wedge-shaped lock core. A limiting thread is provided on the outer wall of the lock sleeve, and a limiting ring is connected to the outer wall of the lock sleeve through the limiting thread. When the limiting ring is rotated to the extreme position close to the slide groove, the limiting ring contacts the connecting bolt, and the lock sleeve and the wedge-shaped lock core move synchronously, and the tensioning lock head releases the chain.

[0012] Furthermore, the chain is a circular link chain, and the inner diameter of the wedge-shaped lock core is a cross cavity that matches the circular link chain.

[0013] Furthermore, the telescopic mechanism is a hydraulic cylinder, the piston rod is slidably connected to the inner wall of the cylinder barrel of the hydraulic cylinder, the cylinder barrel has a central penetration tube for passing the chain, and the outer wall of the central penetration tube is slidably connected to the inner wall of the hollow cavity of the piston rod.

[0014] Furthermore, the tractor is provided with a chain plate, which is arranged below the piston rod. A chain notch is provided at the end of the chain plate. The position of the chain notch matches the extreme position of the extension of the piston rod. The chain is clamped in the chain notch to prevent the chain from moving as the piston rod contracts.

[0015] Furthermore, the telescopic mechanism is fixed on a machine base, and the machine base and a shell of the telescopic mechanism are connected via a fixed hinge shaft.

[0016] A method for using a chain-type dragger, the dragger comprising a chain and a telescopic mechanism; the center of a piston rod of the telescopic mechanism is set as a hollow cavity, the end of the piston rod is connected to a lock sleeve, a wedge-shaped lock core is slidably connected in the lock sleeve, and the chain passes through the hollow cavity of the piston rod and the inner diameter of the wedge-shaped lock core;

[0017] The telescopic mechanism is activated, the piston rod extends to drive the lock sleeve to move, the lock sleeve and the wedge-shaped lock core slide relative to each other along the wedge surface, the wedge-shaped lock core shrinks toward the center and clamps the chain, so that the chain moves with the extension of the piston rod;

[0018] After the telescopic mechanism is extended to the limit position, the piston rod contracts and drives the lock sleeve to move. The lock sleeve and the wedge-shaped lock core slide relative to each other along the wedge-shaped surface. The wedge-shaped lock core relaxes from the center to the surrounding area and releases the chain. The piston rod drives the lock sleeve and the wedge-shaped lock core to contract, and the chain remains stationary.

[0019] The beneficial effects of the present invention are as follows: the chain-type dragging machine of the present invention has a small volume, a strong pulling force, can realize long-distance dragging, has a simple structure, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the tractor;

[0021] Figure 2 It is a three-dimensional diagram of the hydraulic cylinder;

[0022] Figure 3 It is a cross-sectional view of the hydraulic cylinder;

[0023] Figure 4 It is a three-dimensional diagram of the tension lock;

[0024] Figure 5 It is a cross-sectional view of the tension lock;

[0025] In the figure: 1, round link chain, 2, cylinder back plug, 3, oil cylinder liquid inlet, 4, hydraulic cylinder barrel, 5, center penetration pipe, 6, fixed twist shaft, 7, cylinder end cover, 8, piston rod, 9, lock sleeve, 10, wedge lock core, 11, spring, 12, baffle, 13, retaining spring, 14, chain notch, 15, chain plate, 16, machine base, 17, connecting bolt, 18, slide groove, 19, limit ring, 20, limit thread, 21, cross cavity, 22, piston rod hollow cavity. DETAILED DESCRIPTION

[0026] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] See attached Figure 1-5 The oil cylinder driven chain dragging machine comprises a round link chain 1 and a hydraulic oil cylinder; a piston rod 8 is installed in the hydraulic oil cylinder, the center of the piston rod is set as a hollow cavity 22, the piston rod 8 is slidably connected with the inner wall of the cylinder barrel 4 of the hydraulic oil cylinder, the cylinder barrel 4 is provided with a central penetration tube 5 for passing the round link chain, the outer wall of the central penetration tube 5 is slidably connected with the inner wall of the hollow cavity 22 of the piston rod, the end of the piston rod 8 is connected with a tension lock, the round link chain 1 passes through the hollow cavity 22 of the piston rod and the tension lock, the tension lock locks or releases the round link chain 1, so that the round link chain 1 moves with the movement of the piston rod 8. The movement of the piston rod 8 completes the movement of the round link chain, thereby achieving the purpose of dragging.

[0028] Furthermore, the tensioning lock includes a lock sleeve 9 and a wedge-shaped lock core 10 arranged on the inner wall of the lock sleeve, the lock sleeve 9 is threadedly connected to the end of the piston rod 8, the inner diameter of the lock sleeve 9 and the outer diameter of the wedge-shaped lock core 10 are slidingly connected along the wedge surface, the inner diameter of the wedge-shaped lock core 10 is connected to the hollow cavity 22 of the piston rod, and the round link chain 1 passes through the hollow cavity 22 of the piston rod and the inner diameter of the wedge-shaped lock core 10.

[0029] Furthermore, a baffle 12 is provided at one end of the tensioning lock head away from the piston rod, a C-shaped groove is provided on the inner diameter of the lock sleeve 9, a retaining spring 13 is provided in the C-shaped groove, the baffle 12 is restricted on the inner side of the retaining spring 13, the retaining spring 13 is used to limit and fix the baffle 12, a spring 11 is provided between the end face of the baffle 12 and the wedge-shaped lock core 10, and the circular link chain 1 passes through the baffle 12 and extends outside the baffle.

[0030] Based on the above technical solution, in the initial state, the spring 11 is in a slightly compressed state, providing pre-tightening force for the lock sleeve 9 and the wedge-shaped lock core 10. The baffle 12 has a cross slot, which cooperates with the round link chain 1 to facilitate the round link chain 1 to pass through the baffle 12.

[0031] Furthermore, the wedge-shaped lock core 10 is formed by four parts, the angle of each part of the wedge-shaped lock core is 90°, and there is a gap between each part of the wedge-shaped lock core; the outer diameter of the wedge-shaped lock core 10 includes a wedge-shaped portion and an annular portion, the size of the wedge-shaped portion increases from the end close to the piston rod to the end away from the piston rod, the large outer diameter end of the wedge-shaped portion transitions to the annular portion, the inner diameter shape of the lock sleeve 9 matches the outer diameter shape of the wedge-shaped lock core; the inner diameter of the wedge-shaped lock core 10 matches the round link chain 1.

[0032] Based on the above technical solution, the wedge-shaped lock core is formed by enclosing four parts, each part is connected to the lock sleeve by a connecting bolt 17, and the four parts of the wedge-shaped lock core move synchronously. There is a gap between each part of the wedge-shaped lock core, which can ensure that the wedge-shaped lock core 10 has space to shrink toward the center, which is convenient for locking the round link chain 1. Figure 1Taking the viewing direction in as an example, the action of the wedge-shaped lock core 10 is as follows: start the hydraulic cylinder, the piston rod 8 extends to the right, driving the lock sleeve 9 to move to the right. In the initial state, the position of the wedge-shaped lock core 10 remains unchanged, the lock sleeve 9 and the wedge-shaped lock core 10 slide relative to each other, and the four parts of the wedge-shaped lock core shrink toward the center respectively. The gap between the four parts of the wedge-shaped lock core gradually decreases until the inner diameter of the wedge-shaped lock core 10 locks the round link chain 1. At this time, the lock sleeve 9, the wedge-shaped lock core 10 and the round link chain 1 begin to move synchronously with the piston rod 8, dragging the round link chain 1 to the right; when the piston rod 8 extends After reaching the limit position, the piston rod 8 begins to shrink to the left, driving the lock sleeve 9 to move to the left. In the initial state, due to the presence of the baffle 12 and the spring 11, the position of the wedge-shaped lock core 10 remains unchanged, and the lock sleeve 9 and the wedge-shaped lock core 10 slide relative to each other in opposite directions. The four parts of the wedge-shaped lock core relax in all directions respectively, and the gaps between the four parts of the wedge-shaped lock core gradually increase, and the round link chain 1 is loosened. At this time, the lock sleeve 9 and the wedge-shaped lock core 10 begin to move synchronously with the piston rod 8 and shrink to the left, and the round link chain 1 remains stationary. The above actions are repeated in sequence to achieve long-distance transportation of the round link chain 1.

[0033] Furthermore, a slide groove 18 is provided on the lock sleeve 9, and a connecting bolt 17 is provided in the slide groove 18 and is slidably connected to the slide groove 18. The connecting bolt 17 passes through the slide groove 18 and is connected to the wedge-shaped lock core 10. A limiting thread 20 is provided on the outer wall of the lock sleeve 9, and a limiting ring 19 is connected to the outer wall of the lock sleeve 9 through the limiting thread 20. When the limiting ring 19 is rotated to the extreme position close to the slide groove 18, the limiting ring 19 contacts the connecting bolt 17, and the lock sleeve 9 and the wedge-shaped lock core 10 move synchronously, and the tensioning lock head releases the round link chain 1.

[0034] Based on the above technical solution, Figure 4 As shown, the movement of the piston rod 8 provides power for the action of the wedge-shaped lock core 10, so that the lock sleeve 9 slides along the wedge-shaped surface, and the connecting bolt 17 and the slide groove 18 provide guidance for the sliding process. Under normal working conditions, the limit ring 19 is rotated to the left side of the limit thread 20, and the connecting bolt 17 can slide in the slide groove 18 with the wedge-shaped lock core 10, that is, the wedge-shaped lock core 10 can slide relative to the lock sleeve 9, completing the locking or loosening of the wedge-shaped lock core 10, and dragging the round link chain 1; When the round link chain 1 is to be manually pulled, the limiting ring 19 is rotated to the right side of the limiting thread 20, and the limiting ring 19 limits the connecting bolt 17 to the right side of the slide groove 18, and the connecting bolt 17 cannot slide, so that the lock sleeve 9 and the wedge-shaped lock core 10 form an integrated synchronous movement, and because the right side of the inner diameter of the lock sleeve 9 is an annular portion, the wedge-shaped lock core 10 will not shrink when connected to the annular portion on the right side of the lock sleeve 9, thereby making the wedge-shaped lock core 10 invalid, and the movement of the round link chain 1 in the wedge-shaped lock core 10 is not restricted.

[0035] Preferably, a sealing ring is provided between the annular portion of the wedge-shaped lock core and the lock sleeve 9 .

[0036] Furthermore, the inner diameter of the wedge-shaped lock core 10 is a cross cavity 21 that matches the ring chain 1. Since the ring chain 1 is a chain formed by a plurality of rings connected vertically, the cross cavity 21 can ensure mutual cooperation with the ring chain 1 and lock the ring chain 1 from all directions to the maximum extent.

[0037] Furthermore, the tractor is provided with a chain plate 15, which is welded to the cylinder barrel 4 of the hydraulic cylinder and is located below the piston rod 8. A chain notch 14 is provided at the end of the chain plate 15. The position of the chain notch 14 matches the extreme position of the extension of the piston rod 8. The circular chain 1 is clamped in the chain notch 14 to prevent the circular chain 1 from moving as the piston rod 8 contracts.

[0038] Furthermore, the hydraulic cylinder is fixed on a machine base 16 , and the machine base 16 is connected to a cylinder barrel 4 of the hydraulic cylinder via a fixed twisted shaft 6 .

[0039] A method for using a chain dragger, the dragger comprising a round link chain 1 and a hydraulic cylinder; the center of a piston rod 8 of the hydraulic cylinder is set as a hollow cavity 22, the end of the piston rod 8 is connected to a lock sleeve 9, a wedge-shaped lock core 10 is slidably connected in the lock sleeve 9, and the round link chain 1 passes through the hollow cavity 22 of the piston rod and the inner diameter of the wedge-shaped lock core 10;

[0040] Start the hydraulic cylinder, the piston rod 8 extends to drive the lock sleeve 9 to move, the lock sleeve 9 and the wedge-shaped lock core 10 slide relative to each other along the wedge surface, the wedge-shaped lock core 10 shrinks toward the center and clamps the round link chain 1, so that the round link chain 1 moves with the extension of the piston rod 8;

[0041] The piston rod 8 is extended to the limit position and then retracted. The piston rod 8 retracts and drives the lock sleeve 9 to move. The lock sleeve 9 and the wedge-shaped lock core 10 slide relative to each other along the wedge surface. The wedge-shaped lock core 10 relaxes from the center to the surroundings and releases the circular chain 1. The piston rod 8 drives the lock sleeve 9 and the wedge-shaped lock core 10 to retract, and the circular chain 1 remains stationary.

[0042] The round link chain 1 of the present invention has a very high tensile strength, and the oil cylinder is a strongman. The oil cylinder and the round link chain 1 are combined to manufacture a strongman dragging machine with the smallest volume and weight. The tensioning lock is connected to the piston rod through a thread, and the round link chain passes through the tensioning lock and the center of the oil cylinder. The chain plate 15 below the piston rod 8 is welded to the cylinder barrel 4. The oil cylinder extends to drive the tensioning lock, and the wedge-shaped lock core 10 locks the round link chain 1. The round link chain 1 is dragged to the right; the oil cylinder contracts and the round link chain 1 is stuck by the chain notch 14, and the wedge-shaped lock core 10 and the lock sleeve 9 form a gap and no locking force follows the piston rod 8 to move to the right. The oil cylinder extends again and drags again. There is a limit ring 19 on the lock sleeve 9 for manually controlling the wedge-shaped lock core 10. The free movement of the round link chain 1 can be achieved by operating the limit ring 19 to rotate left and right.

[0043] The hydraulic cylinder used in the present invention can be replaced by a gas cylinder, an electric telescopic rod or other telescopic mechanisms that can achieve corresponding functions, all of which fall within the protection scope of the present invention.

[0044] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A chain dragger driven by a hydraulic cylinder, characterized in that: It includes a chain and a telescopic mechanism; the center of the piston rod of the telescopic mechanism is set as a hollow cavity, the end of the piston rod is connected to a tensioning lock, the chain passes through the hollow cavity of the piston rod and the tensioning lock, the tensioning lock locks or loosens the chain, so that the chain moves with the movement of the piston rod; the tensioning lock includes a locking sleeve and a wedge-shaped lock core arranged on the inner wall of the locking sleeve, the locking sleeve is connected to the end of the piston rod, the inner diameter of the locking sleeve and the outer diameter of the wedge-shaped lock core are slidably connected along the wedge surface, the inner diameter of the wedge-shaped lock core is connected to the hollow cavity of the piston rod, and the chain passes through the hollow cavity of the piston rod and the inner diameter of the wedge-shaped lock core.

2. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: A baffle is arranged at one end of the tension lock head away from the piston rod, the baffle is connected to the inner diameter of the lock sleeve through a retaining spring, a spring is arranged between the baffle and the end surface of the wedge-shaped lock core, and the chain passes through the baffle and extends outside the baffle.

3. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: The wedge-shaped lock core is formed by four parts, the angle of each part of the wedge-shaped lock core is 90°, and there is a gap between each part of the wedge-shaped lock core; the outer diameter of the wedge-shaped lock core includes a wedge-shaped portion and an annular portion, the size of the wedge-shaped portion increases from the end close to the piston rod to the end away from the piston rod, and the large outer diameter end of the wedge-shaped portion transitions to the annular portion; the inner diameter of the wedge-shaped lock core matches the chain.

4. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: A slide groove is arranged on the lock sleeve, and a connecting bolt is arranged in the slide groove and is slidably connected with the slide groove. The connecting bolt passes through the slide groove and is connected to the wedge-shaped lock core. A limiting thread is arranged on the outer wall of the lock sleeve, and a limiting ring is connected to the outer wall of the lock sleeve through the limiting thread. When the limiting ring is rotated to the extreme position close to the slide groove, the limiting ring contacts the connecting bolt, and the lock sleeve and the wedge-shaped lock core move synchronously, and the tensioning lock head releases the chain.

5. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: The chain is a round-ring chain, and the inner diameter of the wedge-shaped lock core is a cross cavity matched with the round-ring chain.

6. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: The telescopic mechanism is a hydraulic cylinder, the piston rod is slidably connected to the inner wall of the cylinder barrel of the hydraulic cylinder, the cylinder barrel is provided with a central penetration tube for passing the chain, and the outer wall of the central penetration tube is slidably connected to the inner wall of the hollow cavity of the piston rod.

7. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: The dragging machine is provided with a chain plate, which is arranged below the piston rod. The end of the chain plate is provided with a chain notch, the position of the chain notch matches the extreme position of the extension of the piston rod, and the chain is clamped in the chain notch.

8. The oil cylinder driven chain dragging machine according to claim 1, characterized in that: The telescopic mechanism is fixed on a machine base, and the machine base is connected to a shell of the telescopic mechanism through a fixed hinge shaft.

9. The method for using the oil cylinder driven chain dragger is characterized by: The dragging machine includes a chain and a telescopic mechanism; the center of the piston rod of the telescopic mechanism is set as a hollow cavity, the end of the piston rod is connected to a lock sleeve, a wedge-shaped lock core is slidably connected in the lock sleeve, and the chain passes through the hollow cavity of the piston rod and the inner diameter of the wedge-shaped lock core; When the telescopic mechanism is started, the piston rod extends to drive the lock sleeve to move, and the lock sleeve and the wedge-shaped lock core slide relative to each other along the wedge-shaped surface. The wedge-shaped lock core contracts toward the center and clamps the chain, so that the chain moves as the piston rod extends. After the telescopic mechanism is extended to the extreme position, the piston rod contracts and drives the lock sleeve to move, and the lock sleeve and the wedge-shaped lock core slide relative to each other along the wedge-shaped surface. The wedge-shaped lock core relaxes from the center to the surroundings and releases the chain. The piston rod drives the lock sleeve and the wedge-shaped lock core to contract, and the chain remains stationary.

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