Slide block connecting device with hydraulic locking function

Abstract

The application discloses a slider connecting device with hydraulic locking function, which comprises a slider and a connecting device; the connecting device comprises an oil cylinder, a hydraulic locking component, an adjusting nut and an adjusting screw rod; the oil cylinder is fixedly connected to the slider; the oil cylinder is provided with a movable cavity; the bottom of the movable cavity is communicated with hydraulic oil; the movable cavity is provided with the adjusting nut; the upper end surface of the adjusting nut is provided with a pressing nut; the adjusting screw rod extends into the movable cavity and is in threaded cooperation with the pressing nut and the adjusting nut; the hydraulic locking component is installed on the top of the oil cylinder and blocks the upward movement of the pressing nut through the hydraulic oil. The pressing nut of the application drives the adjusting screw rod to always generate downward pressing force on the adjusting nut, effectively prevents the reversing of the thread gap between the adjusting screw rod and the adjusting nut, thereby avoiding the generation of harmful impact; meanwhile, due to the effect of the pressing force, the thread contact surface between the adjusting screw rod and the adjusting nut can generate sufficient friction force, thereby avoiding the loosening of the thread and improving the precision of the punched part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of press equipment, and in particular to a slider connecting device with hydraulic locking function. BACKGROUND

[0002] The existing thread cooperation between the adjusting screw and the adjusting nut leaves a certain axial gap. During the up and down movement of the slider, under the action of the mold reaction force and the inertia force of the slider, the thread gap between the adjusting screw and the adjusting nut will be reversed up and down, and impact each other, affecting the service life of the mechanism. At the same time, the adjusting screw and the adjusting nut will also rotate with each other, thereby affecting the repeated accuracy of the slider at the lower dead point, and ultimately affecting the accuracy of the stamped parts. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a slider connecting device with hydraulic locking function for improving the service life of the mechanism and the accuracy of the stamped parts.

[0004] The slider connecting device with hydraulic locking function according to the first aspect of the present application comprises a slider and a connecting device; the connecting device comprises an oil cylinder, a hydraulic locking member, an adjusting nut, and an adjusting screw; the oil cylinder is installed on the slider; the oil cylinder is provided with a movable cavity; the bottom of the movable cavity is connected to hydraulic oil; the movable cavity is provided with a rotatable adjusting nut; the upper end surface of the adjusting nut is installed with a compression nut; the adjusting screw extends into the movable cavity and is threadedly connected with the compression nut and the adjusting nut; the hydraulic locking member is installed on the top of the oil cylinder and blocks the upward movement of the compression nut by hydraulic oil; and a driving device is used to drive the rotation of the adjusting nut.

[0005] The slider connecting device with hydraulic locking function according to the embodiment of the present application has at least the following technical effects: the top of the oil cylinder is provided with a hydraulic locking member; under the driving of high-pressure hydraulic oil provided by the external hydraulic device, the compression nut drives the adjusting screw to always generate downward compression force on the adjusting nut, effectively preventing the thread gap between the adjusting screw and the adjusting nut from reversing, thereby avoiding harmful impact; at the same time, due to the effect of the compression force, the thread contact surface between the adjusting screw and the adjusting nut will generate sufficient friction, thereby avoiding thread loosening and further improving the accuracy of the stamped parts.

[0006] According to some embodiments of the present application, the hydraulic locking member comprises a compression oil cylinder and a compression ring; the compression ring is located above the compression oil cylinder and installs the up and down movable compression oil cylinder on the top of the oil cylinder; the compression oil cylinder is clamped on the compression nut; the compression oil cylinder is provided with a first piston; the upper end of the first piston abuts against the bottom surface of the compression ring; and the bottom of the first piston is connected to hydraulic oil.

[0007] According to some embodiments of the present application, a second piston movable up and down is further arranged in the movable cavity, the adjusting nut is above the second piston, and the adjusting screw rod extends into the second piston.

[0008] According to some embodiments of the present application, the driving device comprises a worm gear, a worm and a motor, the worm gear is sleeved outside the adjusting nut and is keyed connected with the adjusting nut, the worm is arranged in the oil cylinder and cooperates with the worm gear, and the motor drives the worm to rotate.

[0009] According to some embodiments of the present application, a nut adjusting pad is arranged between the adjusting nut and the second piston.

[0010] According to some embodiments of the present application, a first sealing ring is arranged at the contact position between the second piston and the inner wall of the movable cavity.

[0011] According to some embodiments of the present application, an oil pool is arranged on the side surface of the connecting device, and the oil pool is communicated with the oil cylinder.

[0012] According to some embodiments of the present application, the cross-sectional area of the oil pool is greater than that of the oil cylinder.

[0013] According to some embodiments of the present application, a piston retaining ring is arranged in the movable cavity, the piston retaining ring is connected with the inner wall of the oil cylinder and is clamped on the top of the second piston.

[0014] According to some embodiments of the present application, a second sealing ring is arranged at the contact position between the first piston and the inner wall of the pressing oil cylinder.

[0015] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Additional aspects and advantages of the present application will become apparent from the following description with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a structural schematic view of the sliding block connecting device with hydraulic locking function according to the embodiments of the present application;

[0018] Figure 2 It is a partial sectional view of the sliding block connecting device with hydraulic locking function;

[0019] Figure 3 It is a sectional view of the connecting device;

[0020] Figure 4 It is Figure 3 the sectional view of A-A in FIG. 4.

[0021] Reference numerals: slider 100, connecting device 200, oil cylinder 210, movable cavity 211, hydraulic locking component 220, clamping oil cylinder 221, clamping ring 222, first piston 223, first guide sleeve 224, adjusting nut 230, adjusting screw 240, clamping nut 250, second guide sleeve 251, retaining ring 252, second piston 260, nut adjusting pad 261, first sealing ring 262, piston retaining ring 270, flange 280, driving device 300, worm gear 310, worm 320, motor 330, oil sump 400. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that directional descriptions, such as up, down, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These descriptions are merely for the convenience of describing the invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limiting the invention.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as snap-fit, installation, and connection should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] Reference Figure 1 , 2 As shown in Figure 3, the slider connecting device with hydraulic locking function according to an embodiment of the present invention includes a slider 100 and a connecting device 200; the connecting device 200 includes a cylinder 210, a hydraulic locking component 220, an adjusting nut 230, and an adjusting screw 240. The cylinder 210 is fixed to the slider 100. The cylinder 210 has a movable cavity 211. The bottom of the movable cavity 211 is connected to hydraulic oil. The movable cavity 211 is provided with a rotatable adjusting nut 230. A clamping nut 250 is installed on the upper end face of the adjusting nut 230. The adjusting screw 240 extends into the movable cavity 211 and is threadedly engaged with the clamping nut 250 and the adjusting nut 230. The hydraulic locking component 220 is installed on the top of the cylinder 210 and blocks the clamping nut 250 from moving upward by hydraulic oil; a driving device 300 is used to drive the adjusting nut 230 to rotate.

[0026] The slider connecting device is a mechanical device connecting the slider 100 of the press and the beam main transmission, which functions to transmit the action and power of the beam main transmission to the slider 100, and through the connecting device 200, the position of the slider 100 can be adjusted up and down to meet the installation requirements of molds of different heights. Specifically, the connecting device 200 can be multiple, for example, as shown in Figure 1 、 2 , two connecting devices 200 are installed on the slider 100, and the oil cylinder 210 is directly welded on the slider 100, canceling the existing threaded connection, under the premise that the weight of the slider 100 remains unchanged, effectively improving the rigidity of the slider 100, making the machine have higher precision, and at the same time, making the structure of the slider 100 more compact, reducing the height of the whole press, saving the cost of the machine and reducing the installation space required by the machine; as shown in Figure 3 , the middle part of the oil cylinder 210 is a concave hole forming a movable cavity 211, and the side wall of the bottom of the oil cylinder 210 is provided with a through hole in communication with the movable cavity 211, and the external hydraulic device passes high-pressure hydraulic oil into the bottom of the movable cavity 211 through the through hole; since the compression nut 250 is installed on the adjusting nut 230, the compression nut 250 rotates with the adjusting nut 230, specifically, the upper part of the compression nut 250 is installed with a retaining ring 252, and the inside of the compression nut 250 is installed with a second guide sleeve 251, the lower end of the second guide sleeve 251 is in contact with the top of the adjusting nut 230, and the upper end of the second guide sleeve 251 is in contact with the lower end of the retaining ring 252, the compression nut 250, the second guide sleeve 251 and the retaining ring 252 are installed on the adjusting nut 230 through screws, and the compression nut 250 can slide up and down along the second guide sleeve 251. The compression nut 250 and the adjusting nut 230 are connected together through threads and the adjusting screw 240.

[0027] As shown in Figure 3 , in the adjusting state, the driving device 300 drives the adjusting nut 230 to rotate, the compression nut 250 above the adjusting nut 230 can move in the axial direction relative to the adjusting nut 230 due to the restriction of the hydraulic locking member 220 and the compression nut 250 is fixed together with the adjusting nut 230 or the compression nut 250 is restricted by the second guide sleeve 251, but cannot move in the circumferential direction, so the compression nut 250 rotates with the adjusting nut 230, the upper end of the adjusting screw 240 is connected with the beam main transmission, and the adjusting screw 240 is in a static state and does not rotate with the compression nut 250 and the adjusting nut 230, so the compression nut 250 and the adjusting nut 230 move up and down along the adjusting screw 240, the adjusting nut 230 is fixed together with the slider 100 through the hydraulic locking member 220 and the oil cylinder 210, so the slider 100 also moves up and down, thereby meeting the installation requirements of molds of different heights.

[0028] like Figure 3 As shown, in the connected state, the press performs stamping operations. When the slide block 100 descends, the action and power of the main drive of the press beam are transmitted to the adjusting nut 230 through the adjusting screw 240, then to the high-pressure oil through the adjusting nut shim 261, and finally to the hydraulic cylinder 210. The hydraulic cylinder 210 then transmits the power to the slide block 100, and finally to the stamping die. When the slide block 100 returns, driven by the main drive of the press beam, the adjusting screw 240 drives the clamping nut 250 to move upward. The clamping nut 250 drives the clamping cylinder 221 to move upward. The clamping cylinder 221 moves upward through the hydraulic locking component 220, which in turn drives the hydraulic cylinder 210 to move upward. The hydraulic cylinder 210 drives the slide block 100 to move upward, and the slide block 100 drives the die to move upward, thus realizing the return stroke of the slide block 100.

[0029] like Figure 3 As shown, in the connected state, the hydraulic locking component 220 presses the clamping nut 250 downward under the action of oil pressure. The clamping nut 250 presses the adjusting screw 240 downward through the thread, and the adjusting screw 240 presses the adjusting nut 230 downward. This can effectively prevent the thread clearance between the adjusting screw 240 and the adjusting nut 230 from changing direction, thereby avoiding harmful impacts. At the same time, due to the clamping force, the threaded contact surface between the adjusting screw 240 and the adjusting nut 230 will generate a sufficiently large frictional force, thereby preventing the threads from loosening and improving the accuracy of the stamped parts.

[0030] like Figure 3 As shown, in the adjustment state, the hydraulic locking component 220 is depressurized and in a relaxed state. The clamping force between the adjusting screw 240 and the adjusting nut 230 disappears. Driven by the drive device 300, the adjusting screw 240 and the adjusting nut 230 rotate relative to each other, and the slider 100 moves up and down with the adjusting nut 230, thereby meeting the installation requirements of molds of different heights.

[0031] In some embodiments of the present invention, such as Figure 3As shown, the hydraulic locking member 220 comprises a pressing oil cylinder 221 and a pressing ring 222, the pressing ring 222 is located above the pressing oil cylinder 221 and installs the up-and-down movable pressing oil cylinder 221 on the top of the oil cylinder 210, the pressing oil cylinder 221 is clamped on the pressing nut 250, the first piston 223 is arranged in the pressing oil cylinder 221, the upper end of the first piston 223 abuts against the bottom surface of the pressing ring 222, and the bottom of the first piston 223 is communicated with hydraulic oil. Specifically, the connecting device 200 further comprises a flange 280, the flange 280 is installed on the top of the oil cylinder 210 through screws, the pressing oil cylinder 221 is located above the flange 280, the hydraulic locking member 220 further comprises screws and a first guide sleeve 224, a group of first guide sleeves 224 are arranged in the pressing oil cylinder 221, the lower end of the first guide sleeve 224 is in contact with the top of the flange 280, the upper end of the first guide sleeve 224 is in contact with the lower end of the pressing ring 222, the pressing ring 222 and the first guide sleeve 224 are installed on the flange 280 through screws, and the pressing oil cylinder 221 can slide up and down along the first guide sleeve 224; in the connected state, the press performs stamping work. When the sliding block 100 returns, the pressing nut 250 is driven by the adjusting screw rod 240 to move upward under the driving of the main transmission of the press beam, the pressing oil cylinder 221 is driven by the pressing nut 250 to move upward, the pressing ring 222 is driven by the pressing oil cylinder 221 to move upward through high-pressure oil and the first piston 223, the oil cylinder 210 is driven by the pressing ring 222 to move upward through screws, and the sliding block 100 is driven by the oil cylinder 210 to move upward, so that the sliding block 100 returns; in the connected state, high-pressure oil is introduced between the first piston 223 and the pressing oil cylinder 221, the first piston 223 cannot move due to the limitation of the pressing ring 222, the pressing oil cylinder 221 is pressed downward to the pressing nut 250 under the action of oil pressure, the pressing nut 250 is pressed downward to the adjusting screw rod 240 through the trapezoidal thread, the adjusting screw rod 240 is pressed downward to the adjusting nut 230, so that the thread gap between the adjusting screw rod 240 and the adjusting nut 230 is prevented from reversing, thereby avoiding harmful impact, and due to the action of the pressing force, a large enough friction force is generated on the thread contact surface between the adjusting screw rod 240 and the adjusting nut 230, so that the thread is prevented from loosening; in the adjusting state, the high-pressure oil between the first piston 223 and the pressing oil cylinder 221 is decompressed, the pressing force between the adjusting screw rod 240 and the adjusting nut 230 disappears, the adjusting screw rod 240 and the adjusting nut 230 are rotated under the driving of the driving device 300, and the sliding block 100 moves up and down with the adjusting nut 230, so as to meet the installation requirements of molds with different heights.

[0032] In some embodiments of the present application, as Figure 3As shown, the second piston 260 is arranged to move up and down in the movable cavity 211, the adjusting nut 230 is arranged above the second piston 260, and the adjusting screw 240 is arranged to extend into the second piston 260. The second piston 260 is arranged to avoid damaging the adjusting nut 230.

[0033] In some embodiments of the present application, as shown in Figure 2 、 3 , the driving device 300 comprises a worm wheel 310, a worm 320 and a motor 330. The worm wheel 310 is arranged to surround the adjusting nut 230 and is keyed to the adjusting nut 230. The worm 320 is arranged in the oil cylinder 210 and cooperates with the worm wheel 310. The motor 330 drives the worm 320 to rotate. The motor 330 is connected to the worm 320 through a small sprocket, a chain and a large sprocket. In the adjusting state, the motor 330 is energized to drive the small sprocket to rotate. The small sprocket drives the large sprocket to rotate through the chain. The large sprocket drives the worm 320 to rotate. The worm 320 drives the worm wheel 310 to rotate. The worm wheel 310 drives the adjusting nut 230 to rotate through the guide key. The worm wheel 310 and the worm 320 are cooperated to prevent the adjusting nut 230 from rotating, thereby improving the precision of the stamped parts.

[0034] In further embodiments of the present application, as shown in Figure 3 , a nut adjusting pad 261 is arranged between the adjusting nut 230 and the second piston 260. The nut adjusting pad 261 is arranged to avoid damaging the adjusting nut 230 or the second piston 260.

[0035] In further embodiments of the present application, as shown in Figure 3 , a first sealing ring 262 is arranged at the contact position between the second piston 260 and the inner wall of the movable cavity 211. The first sealing ring 262 is arranged to prevent the hydraulic oil at the bottom of the second piston 260 from flowing to the top of the second piston 260.

[0036] In further embodiments of the present application, as shown in Figure 2 、 3 , an oil pool 400 is arranged on the side of the connecting device 200. The oil pool 400 is in communication with the oil cylinder 210. The oil pool 400 is arranged to keep the worm 320 lubricated.

[0037] In further embodiments of the present application, as shown in Figure 3 , the cross-sectional area of the oil pool 400 is greater than the cross-sectional area of the oil cylinder 210. The cross-sectional area refers to the cross-sectional area of the oil pool 400 and the cross-sectional area of the oil cylinder 210 in the direction perpendicular to the longitudinal direction of the oil pool 400 and the oil cylinder 210. Figure 2A middle horizontal direction is a plane, the oil pool 400 or the oil cylinder 210 is cut by the plane The area of the surface; in the adjustment state, the adjusting screw 240 moves up and down relative to the slider 100, which will obviously change the oil level of the lubricating oil in the oil cylinder 210 where the worm 320 is located; when the adjusting screw 240 moves downward, the lower end of the adjusting screw 240 occupies the space of the hydraulic oil, the oil level of the lubricating oil rises, and the lubricating oil may overflow the oil cylinder 210 and flow to the outside of the connecting device 200, causing pollution; when the adjusting screw 240 moves upward, the lower end of the adjusting screw 240 occupies the space of the hydraulic oil, and the oil level of the lubricating oil decreases, and the oil level of the lubricating oil may be lower than the worm 320, thereby losing the lubricating effect on the worm 320 and the worm gear pair, affecting the normal use of the machine. In order to solve the problem of excessive fluctuation of the oil level of the hydraulic oil in the adjustment state, an oil pool 400 is arranged on the side of the connecting device 200, and the oil pool 400 is connected with the oil cylinder 210 through the oil hole on the side of the oil cylinder 210. Because the oil level range of the oil pool 400 is relatively large, when the oil level in the oil cylinder 210 fluctuates up and down, the lubricating oil in the oil pool 400 can supplement and absorb the lubricating oil in the oil cylinder 210, greatly reducing the fluctuation range of the oil level in the oil cylinder 210, so that the oil level of the lubricating oil is always in contact with the worm 320, and the worm 320 and the worm gear 310 are always fully lubricated.

[0038] In further embodiments of the present application, as shown in Figure 3 A piston stop ring 270 is arranged in the movable cavity 211, and the piston stop ring 270 is connected with the inner wall of the oil cylinder 210 and is clamped on the top of the second piston 260. The piston stop ring 270 is arranged to limit the upward movement range of the second piston 260, so as to avoid interference between the second piston 260 and the adjusting nut 230 and the adjusting screw 240.

[0039] In further embodiments of the present application, a second sealing ring (not shown in the figure) is arranged at the contact position between the first piston 223 and the inner wall of the pressing oil cylinder 221, so as to prevent the hydraulic oil from flowing out of the inner wall of the pressing oil cylinder 221.

[0040] In the description of the present application, the description of the terms "some embodiments" or "it can be contemplated" means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and application of the present application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. A slider connecting device with hydraulic locking function, characterized in that, include: slider; The connecting device includes a hydraulic cylinder, a hydraulic locking component, an adjusting nut, and an adjusting screw. The hydraulic cylinder is fixedly connected to the slider. The hydraulic cylinder has a movable cavity, the bottom of which is connected to hydraulic oil. The movable cavity is equipped with a rotatable adjusting nut. A clamping nut is installed on the upper end face of the adjusting nut. The adjusting screw extends into the movable cavity and is threadedly engaged with the clamping nut and the adjusting nut. The hydraulic locking component is installed on the top of the hydraulic cylinder and prevents the clamping nut from moving upward through hydraulic oil. A driving device is used to drive the adjusting nut to rotate; In the connected state, the hydraulic locking component presses the clamping nut downward under the action of oil pressure, the clamping nut presses the adjusting screw downward through the thread, and the adjusting screw presses the adjusting nut downward; The driving device includes a worm gear, a worm, and a motor. The worm gear is sleeved on the outside of the adjusting nut and keyed to the adjusting nut. The worm is located inside the oil cylinder and cooperates with the worm gear. The motor drives the worm to rotate. The hydraulic locking component includes a clamping cylinder and a clamping ring. The clamping ring is located above the clamping cylinder, and the clamping cylinder, which can move up and down, is installed on the top of the cylinder. The clamping cylinder is snapped onto the clamping nut. A first piston is provided inside the clamping cylinder. The upper end of the first piston abuts against the bottom surface of the clamping ring, and the bottom of the first piston is connected to hydraulic oil. A retaining ring is installed above the clamping nut, and a second guide sleeve is installed inside the clamping nut. The lower end of the second guide sleeve contacts the top of the adjusting nut, and the upper end of the second guide sleeve contacts the lower end of the retaining ring. The clamping nut, the second guide sleeve, and the retaining ring are installed on the adjusting nut by screws, and the clamping nut can slide up and down along the second guide sleeve. The connecting device further includes a flange, which is installed on the top of the cylinder by screws. The clamping cylinder is located above the flange. The hydraulic locking component further includes screws and a first guide sleeve. A set of first guide sleeves is installed inside the clamping cylinder. The lower end of the first guide sleeve contacts the top of the flange, and the upper end of the first guide sleeve contacts the lower end of the clamping ring. The clamping ring and the first guide sleeve are installed on the flange by screws. The clamping cylinder slides up and down along the first guide sleeve.

2. The slider connecting device with hydraulic locking function according to claim 1, characterized in that: The movable cavity is also equipped with a second piston that can move up and down. The adjusting nut is located above the second piston, and the adjusting screw extends into the second piston.

3. The slider connecting device with hydraulic locking function according to claim 2, characterized in that: A nut adjusting pad is provided between the adjusting nut and the second piston.

4. The slider connecting device with hydraulic locking function according to claim 2, characterized in that: A first sealing ring is provided at the contact point between the second piston and the inner wall of the movable cavity.

5. The slider connecting device with hydraulic locking function according to claim 1, characterized in that: An oil tank is provided on the side of the connecting device, and the oil tank is connected to the oil cylinder.

6. The slider connecting device with hydraulic locking function according to claim 5, characterized in that: The cross-sectional area of ​​the oil tank is larger than that of the oil cylinder.

7. The slider connecting device with hydraulic locking function according to claim 2, characterized in that: The movable chamber is provided with a piston retaining ring, which is connected to the inner wall of the oil cylinder and is engaged with the top of the second piston.

8. The slider connecting device with hydraulic locking function according to claim 1, characterized in that: A second sealing ring is provided at the contact point between the first piston and the inner wall of the clamping cylinder.

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