Hydraulic puller

Abstract

The utility model discloses a hydraulic puller, which relates to the technical field of manual tools and comprises a hydraulic cylinder, the periphery of the hydraulic cylinder is provided with external threads, the lower end of the hydraulic cylinder is provided with a guide pipe, the side wall of the guide pipe is provided with three strip-shaped holes, the side wall of an ejector rod is respectively provided with three pressing rods, and each pressing rod horizontally penetrates out of the corresponding strip-shaped hole. The bottom of the outer end of each pressing rod is provided with a pressing device, the periphery of the lower end of the guide pipe is evenly provided with three locking seats, the lower end of each locking seat is provided with a reinforcing rib, each locking seat is composed of an upper plate and a lower plate, an inserting plate groove is formed between the upper plate and the lower plate, an inserting plate is horizontally installed in each inserting plate groove, and the outer end of each inserting plate is hinged to a pull rod. The outer ends of the pull rods are hinged with pull claws through pin shafts; the hydraulic puller disclosed by the utility model is provided with the locking device, can be effectively locked, is stable and reliable, and can generate a powerful locking effect by utilizing the precisely designed locking device, so that the possibility of slipping relative to a bearing or a die sleeve in the operation process is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hand tool technical field, specifically is a hydraulic puller. BACKGROUND

[0002] In industrial production, the disassembly of bearings and tubular sleeves is a common maintenance task. These components are usually fitted over the sleeve during installation and, after a long period of use, need to be disassembled and replaced due to wear and tear or damage. Hydraulic pullers, as an efficient disassembly tool, are widely used in this field. The working principle of the hydraulic puller is to hook the bearing or sleeve with its hook, while the hydraulic cylinder needle is in contact with the end of the sleeve. When the hydraulic cylinder needle is pushed out, the relative displacement effect between the needle and the hook occurs, thereby pulling the bearing or sleeve out of the sleeve. However, in practical application, there are some technical problems in the disassembly process of the hydraulic puller: due to the possibility of local smoothness on the surface of the sleeve, or the small size of the sleeve and the local damage of part of the sleeve, the effective contact area between the hook and the sleeve is small. In this case, the hook is prone to slip and open during the process of pulling the sleeve, which affects the disassembly efficiency, and may even cause damage to the equipment and tools.

[0003] In order to solve the above problems, it is necessary to improve and optimize the hydraulic puller in order to effectively reduce the slipping phenomenon, improve the disassembly efficiency and universality, and ensure the smooth progress of industrial maintenance work. SUMMARY

[0004] To solve the above problems, the purpose of the utility model is to provide a hydraulic puller, which can effectively reduce the opening of the puller due to slipping during the process of pulling the sleeve or bearing, and can make the puller hook the sleeve or bearing tightly, thereby improving the work efficiency.

[0005] The utility model realizes the above-mentioned purpose through the following technical scheme:

[0006] The utility model provides a hydraulic puller, including hydraulic cylinder, the outer periphery of hydraulic cylinder is equipped with external thread, the lower extreme of hydraulic cylinder is equipped with guide pipe, the lower extreme of hydraulic cylinder piston rod is connected to the jacks, and the jacks extend from the guide pipe, the outer periphery of external thread installs puller ring, and puller ring is screwed with external thread, and the outer periphery of puller ring is articulated three connecting arms respectively, and the other end of connecting arm is articulated a puller claw respectively, three strip holes are set up on the lateral wall of guide pipe, three pressure bars are installed on the lateral wall of jacks respectively, and every pressure bar passes out strip hole horizontally, and the bottom of the outer end of every pressure bar is installed pressure device, and the outer periphery of the lower extreme of guide pipe evenly installs three locking seat, and the lower extreme of every locking seat is provided with reinforcing rib, and every locking seat is formed by upper plate and lower plate, and there is the insert plate slot between upper plate and lower plate, and the insert plate is installed horizontally in every insert plate slot, and the outer end of insert plate is articulated pull rod, and the outer end of pull rod is articulated puller claw through the hinge pin, and the upper plate of every upper plate has a touch pressure head, and three touch pressure heads and three pressure devices are one to one.

[0007] Preferably, the puller claw is composed of an adjusting sleeve and a puller hook claw through an adjusting pin, one end of the puller hook claw is inserted into the adjusting sleeve, a pin hole is arranged on the puller hook claw, two insertion holes are arranged on the adjusting sleeve, and the pin hole and the insertion holes are corresponding.

[0008] Preferably, the pressure device is composed of a sleeve and a pressure head, a spring is arranged in the sleeve, the spring provides a buffer force for the pressure head, and the pressure device has elasticity.

[0009] Compared with the prior art, the hydraulic puller has the following advantages:

[0010] The hydraulic puller is provided with a locking device, can be effectively locked, is stable and reliable, can produce a strong locking effect by using the precisely designed locking device, ensures that the position of the puller hook claw is stably limited, and greatly reduces the possibility of slipping relative to the bearing during operation. Compared with the traditional device, the locking effect of the device does not need additional manual adjustment. The locking is realized synchronously with the extension action of the jacks of the hydraulic cylinder, simplifies the operation process, and reduces the operation difficulty.

[0011] The locking structure is closely integrated with the extension function of the jacks of the hydraulic cylinder, and forms an integrated design. This design not only improves the overall performance of the device, but also makes the operation more convenient and efficient. Due to the presence of the locking device, the device can quickly position and fix the puller hook claw during use, thereby improving the work efficiency. At the same time, repeated operations and potential damage caused by slipping are reduced, and the maintenance cost and use cost are reduced. The stable locking effect not only improves the work efficiency, but also enhances the safety of the device. During operation, personnel can use the device more confidently, and the safety risk caused by slipping and other accidents is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1is the front view of the hydraulic puller.

[0013] Figure 2 is the state diagram of the hydraulic puller when disassembling the bearing on the sleeve.

[0014] Figure 3 is the structural schematic diagram of the guide pipe 10.

[0015] Figure 4 is the connection schematic diagram among the top rod 7, the pressing rod 11 and the pressing device 12.

[0016] Figure 5 is the structural schematic diagram of the pressing device 12.

[0017] Figure 6 is the structural schematic diagram of the contact head 13, the lower plate 19 and the upper plate 20 relative to the guide pipe 10.

[0018] Figure 7 is Figure 1 the enlarged view of A in the figure;

[0019] Figure 8 is the perspective view of the guide pipe installing three locking seats.

[0020] Reference signs:

[0021] 1-puller ring, 2-connecting arm, 3-adjusting sleeve, 4-adjusting pin, 5-puller hook claw, 6-pull rod, 7-top rod, 8-hydraulic cylinder, 9-external thread, 10-guide pipe, 11-pressing rod, 12-pressing device, 13-contact head, 14-inserting plate, 15-strip-shaped hole, 16-sleeve, 17-pressing head, 18-spring, 19-lower plate, 20-upper plate, 21-inserting plate slot, 22-locking seat, 23-puller claw. DETAILED DESCRIPTION

[0022] The utility model aims at providing a hydraulic puller, and the utility model will be further described in combination with specific embodiments. EMBODIMENT

[0023] The hydraulic puller is a tool working by hydraulic principle, and its operation mainly depends on the direct forward movement of the oil pressure starting rod. In the operation process, the pushing rod itself does not rotate, but directly advances or retreats by the hook claw seat with the thread. The user only needs to swing the handle back and forth in a small range, and the oil pressure starting rod will move forward, and the hook claw will retreat correspondingly, so as to realize the purpose of pulling out the pulled object.

[0024] A hydraulic puller, such as Figure 1As shown, including hydraulic cylinder 8, the outer periphery of hydraulic cylinder 8 is provided with external thread 9, the lower end of hydraulic cylinder 8 is provided with guide pipe 10, the lower end of the piston rod of hydraulic cylinder 8 is connected to the ejector rod 7, the ejector rod 7 extends from the guide pipe 10, the outer periphery of the external thread 9 is installed with the puller ring 1, the puller ring 1 is screwed with the external thread 9, the puller ring 1 can adjust the position on the external thread 9 as needed, the outer periphery of the puller ring 1 is respectively hinged with three connecting arms 2, the other end of the connecting arm 2 is respectively hinged with a puller claw 23, three strip-shaped holes 15 are formed on the side wall of the guide pipe 10, three pressure rods 11 are respectively installed on the side wall of the ejector rod 7, each pressure rod 11 horizontally penetrates the strip-shaped hole 15, the outer end bottom of each pressure rod 11 is installed with a pressing device 12, three locking seats 22 are uniformly installed on the lower end of the outer periphery of the guide pipe 10, the lower end of each locking seat 22 is provided with a reinforcing rib, each locking seat 22 is composed of an upper plate 20 and a lower plate 19, there is an insert plate slot 21 between the upper plate 20 and the lower plate 19, an insert plate 14 is horizontally installed in each insert plate slot 21, the outer end of the insert plate 14 is hinged with a pull rod 6, the outer end of the pull rod 6 is hinged with the puller claw 23 through a pin shaft; There is a touch head 13 above each upper plate 20, the three touch heads 13 and the three pressing devices 12 correspond one by one.

[0025] The conventional hydraulic puller works, the puller claw 5 first moves downward to open and hold the outer edge of the bearing, under the action of the hydraulic cylinder 8, the ejector rod 7 extends from the guide pipe 10 and is tightly pressed with the sleeve end, in the subsequent process of the ejector rod 7 gradually extending, the puller claw 5 produces upward relative displacement effect relative to the lower end of the ejector rod 7, thereby gradually pulling the bearing away from the sleeve. Figure 2 As shown, in the actual dismounting process, the puller claw 5 first moves downward, prepares to open and hold the outer edge of the bearing, in the process of opening and closing of the puller claw 5, the pressure rod 11 can drive the pressing device 12 downward, among which the pull rod 6 and the insert plate 14, based on the hinged relationship with the puller claw 23, make the insert plate 14 be able to slide into or pull out in the corresponding insert plate slot 21, the touch head 13 is integrally formed on the upper surface of each upper plate 20, by pressing the touch head 13, indirectly making the upper plate 20 produce the effect of pressing downward, so that the upper plate 20 and the lower plate 19 can produce the effect of clamping the insert plate 14, when the insert plate 14 is clamped, the puller claw 5 presents a certain position locking effect, reduces the possibility of slipping relative to the bearing, at the same time, the locking effect also does not need additional adjustment, the whole is realized based on the extension of the ejector rod of the hydraulic cylinder 8, so the operation is relatively convenient.

[0026] On the other hand, since the plug-in slot 21 has a certain length, the plug-in plate 14 can meet the needs of the hydraulic puller to different sizes of bearings or bushings, when the bearing or the bushing is large, the plug-in plate 14 is on the outside of the plug-in slot 21, when the bearing or the bushing is small, the plug-in plate 14 is on the inner side of the plug-in slot 21, but it does not affect the use of the locking seat 22, so that the hydraulic puller has universality.

[0027] Preferably, the pull claw 23 is composed of the adjusting sleeve 3 and the puller hook claw 5 through the adjusting pin 4, one end of the puller hook claw 5 is inserted into the adjusting sleeve 3, an insertion hole is arranged on the puller hook claw 5, two insertion holes are arranged on the adjusting sleeve 3, and the insertion hole and the insertion holes are corresponding. In this way, the depth of the puller hook claw 5 inserted into the adjusting sleeve 3 can be adjusted, and the length of the puller hook claw 5 can be conveniently adjusted according to different working conditions.

[0028] Preferably, the pressing device 12 is composed of the sleeve 16 and the pressure head 17, the spring 18 is arranged in the sleeve 16, the spring 18 buffers the force of the pressure head 17, so that the pressing device 12 has elasticity, when the elastic pressing device 12 moves with the top rod 7 and contacts the contact pressure head 13, the pressure head 17 contacts the contact pressure head 13, and the spring 18 plays a role of elastic pressure, and the stroke can be shortened in the process of providing the pressure.

[0029] The working principle of the utility model is as follows: firstly, the puller hook claw 5 is opened, the puller hook claw 5 hooks the bearing or the bushing to be disassembled; the hydraulic cylinder 8 is manually adjusted, the top rod 7 is pushed out and abuts against the sleeve, then in the process that the top rod 7 is gradually pushed out, the top rod 7 and the puller hook claw 5 generate relative displacement, so that the bearing or the bushing is pulled away from the sleeve, in the process that the top rod 7 is gradually pushed out, the pressing device 12 gradually approaches and contacts the contact pressure head 13, so that the contact pressure head 13 is pressed to make the upper plate 20 press down and clamp the plug-in plate 14, so that effective locking effect is generated, the locking effect can limit the position of the puller hook claw 5, and the possibility of slipping relative to the bearing or the bushing is reduced.

Claims

1. A hydraulic puller, comprising a hydraulic cylinder (8), wherein the outer periphery of the hydraulic cylinder (8) is provided with an external thread (9), a puller ring (1) is mounted on the outer periphery of the external thread (9), the puller ring (1) is threadedly connected to the external thread (9), the outer periphery of the puller ring (1) is hinged to three connecting arms (2), and the other end of each connecting arm (2) is hinged to a pulling claw (23), characterized in that: The lower end of the hydraulic cylinder (8) is provided with a guide pipe (10), the lower end of the piston rod of the hydraulic cylinder (8) is connected with a jacking rod (7), the lower end of the jacking rod (7) can be extended out of the guide pipe (10); three strip-shaped holes (15) are formed in the side wall of the guide pipe (10), three pressing rods (11) are horizontally installed on the side wall of the jacking rod (7) respectively, each pressing rod (11) horizontally passes through the strip-shaped hole (15), and the outer end bottom of each pressing rod (11) is provided with a pressing device (12); the lower end of the guide pipe (10) is uniformly provided with three locking seats (22), the lower end of each locking seat (22) is provided with a reinforcing rib, each locking seat (22) is composed of an upper plate (20) and a lower plate (19), there is an insertion plate slot (21) between the upper plate (20) and the lower plate (19), one insertion plate (14) is horizontally installed in each insertion plate slot (21), the outer end of each insertion plate (14) is hingedly connected with a pull rod (6), the outer end of the pull rod (6) is hingedly connected with a pull claw (23) through a pin shaft; one touch pressure head (13) is arranged above each upper plate (20), and the three touch pressure heads (13) and the three pressing devices (12) correspond one by one.

2. The hydraulic puller of claim 1, wherein: The pull claw (23) is composed of an adjusting sleeve (3) and a puller hook claw (5) through an adjusting pin (4), one end of the puller hook claw (5) is inserted into the adjusting sleeve (3), one insertion pin hole is arranged on the puller hook claw (5), two insertion holes are arranged on the adjusting sleeve (3), and the insertion pin hole and the insertion holes correspond.

3. The hydraulic puller of claim 1, wherein: The pressing device (12) is composed of a sleeve (16), a pressing head (17) and a spring (18), the spring (18) is arranged in the sleeve (16), the spring (18) buffers the force of the pressing head (17), and the pressing device (12) has elasticity.

Images