CN213899728U - Hydraulic buffering device for center frame of heavy machine tool - Google Patents
Hydraulic buffering device for center frame of heavy machine tool Download PDFInfo
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- CN213899728U CN213899728U CN202022270622.XU CN202022270622U CN213899728U CN 213899728 U CN213899728 U CN 213899728U CN 202022270622 U CN202022270622 U CN 202022270622U CN 213899728 U CN213899728 U CN 213899728U
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- 230000003139 buffering effect Effects 0.000 title description 9
- 239000000872 buffer Substances 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims description 26
- 239000010720 hydraulic oil Substances 0.000 claims description 20
- 239000003921 oil Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims 4
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a hydraulic buffer device of a heavy machine tool center frame; the buffer device comprises a center frame base, a hydraulic buffer jacking mechanism and an adjusting mechanism; the hydraulic buffer jacking mechanism is arranged on the center frame base and comprises an adjustable jacking piece and a hydraulic buffer seat; the adjustable jacking piece is columnar and is in sliding fit with the center frame base, and the hydraulic buffer seat is fixed on the center frame base and is jacked at the end part of the adjustable jacking piece; the adjusting mechanism is arranged on the center frame base and acts on the adjustable jacking piece; the invention can buffer the acting force brought by the workpiece after the adjustable jacking piece instantaneously bears the load, effectively avoid the abrasion of the screw rod and nut component and prolong the service life of the center frame.
Description
Technical Field
The utility model belongs to the technical field of machining, concretely relates to heavy lathe centre frame hydraulic buffer.
Background
At present, the center frame of a machine tool realizes the auxiliary supporting function of a workpiece through a nut and a screw rod, the weight of the workpiece is relatively light on a small and light machine tool, the damage effect on the nut and the screw rod is slight, and the use of the center frame cannot be influenced, but on a heavy machine tool, the weight of the workpiece is heavier (the load of the machine tool is more than 63 tons), so when the workpiece is clamped, the weight of the workpiece is mainly born through an adjustable jacking piece on a base of the center frame, and the nut and the screw rod bear the heavier weight; when the center frame bears the weight of a workpiece instantaneously, the screw nut is deformed, and the use is affected.
Disclosure of Invention
The utility model aims at providing a heavy lathe centre frame hydraulic buffer to exist not enough among the prior art, it can cushion after the instantaneous bearing of piece is held on adjustable top, effectively avoids the wearing and tearing of lead screw nut component.
In order to achieve the above object, the utility model adopts the following technical scheme:
a heavy machine tool center frame hydraulic buffer device comprises:
a steady rest base;
the hydraulic buffer jacking mechanism is arranged on the center frame base and comprises an adjustable jacking piece and a hydraulic buffer seat; the adjustable jacking piece is columnar and is in sliding fit with the center frame base, and the hydraulic buffer seat is fixed on the center frame base and is jacked at the end part of the adjustable jacking piece; and
and the adjusting mechanism is arranged on the center frame base and acts on the adjustable jacking piece.
Further, the adjustable holding member comprises:
the jacking head is columnar, one end of the jacking head is provided with a contact used for contacting a workpiece, the other end of the jacking head is provided with a screw rod with a diameter different from that of the jacking head, and the jacking head is in sliding fit with the base of the central frame;
the gear sleeve comprises a sleeve in sliding fit with the center frame base and a first gear arranged on the outer side of the sleeve, and the sleeve is sleeved on the outer side of the screw rod;
the nut sleeve is fixed on the inner side of one end of the sleeve and matched with the screw rod; and
and the end seat is arranged at the other end of the sleeve and is in sliding fit with the center frame base.
Further, the hydraulic cushion socket includes:
the hydraulic oil cylinder is fixed on the center frame base and corresponds to the position below the end seat, and an oil discharge pipeline of the hydraulic oil cylinder is provided with a back pressure valve;
and the rotating seat is arranged at the end part of the hydraulic oil cylinder and is propped against the end seat.
Furthermore, the hydraulic oil cylinder comprises a cylinder body, a flange plate arranged at the end part of the cylinder body, a piston matched with the cylinder body and a piston rod arranged on the piston and extending to the outer side of the cylinder body through the flange plate; the free end of the piston rod is in a stepped shaft shape and is provided with a large-diameter shaft section, a middle-diameter shaft section and a small-diameter shaft section.
Further, the rotating seat comprises a thrust roller bearing, a top block and a deep groove ball bearing; the thrust roller bearing is sleeved on the large-diameter shaft section of the free end of the piston rod, the ejector block is sleeved on the middle-diameter shaft section of the free end of the piston rod and presses the thrust roller bearing, and the deep groove ball bearing is installed between the small-diameter shaft section of the free end of the piston rod and the inner wall of the ejector block.
Furthermore, the adjusting mechanism comprises a first transmission shaft which is arranged in parallel with the axial lead of the gear sleeve and is hinged on the center frame base, a second gear which is arranged on the first transmission shaft and is meshed with the first gear, a third gear which is arranged on the first transmission shaft, a fourth gear which is meshed with the third gear, and a second transmission shaft which is hinged on the center frame base and is fixedly connected with the fourth gear; one end of the second transmission shaft extends to the outer side of the central frame base, the tooth width of the second gear is larger than that of the first gear, a limiting blocking disc is arranged on one side of the second gear, and the limiting blocking disc acts on one side of the first gear.
The utility model has the advantages that:
1. in the structural design, the adjustable jacking piece for jacking the workpiece can integrally slide relative to the central frame, so that the adjustable jacking piece can be integrally buffered by relying on the hydraulic buffer seat, and further deformation and damage between the screw rod and the nut sleeve are effectively avoided; meanwhile, the adjustable jacking piece can also realize self telescopic adjustment through the adjusting mechanism, so that the alignment operation of the workpiece is realized;
2. in the structural design, a back pressure valve is arranged on an oil discharge pipeline of the hydraulic oil cylinder, the acting force of a workpiece on the adjustable propping piece is buffered by utilizing the pressure relief of the back pressure valve, the buffering is stable and safe, and the buffering acting force is adjustable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1-a steady rest base; 2-an adjustable holding member; 3-a hydraulic buffer seat; 4-holding the head; 5-a contact; 6-a screw rod; 7-gear sleeve; 8-a sleeve; 9-a first gear; 10-a nut sleeve; 11-end seat; 12-a hydraulic oil cylinder; 13-a rotating base; 14-a cylinder body; 15-a flange plate; 16-a piston; 17-a piston rod; 18-thrust roller bearings; 19-a top block; 20-deep groove ball bearing; 21-a first drive shaft; 22-a second gear; 23-a third gear; 24-a fourth gear; 25-a second drive shaft; 26-a limit stop disc; 27-sliding bearing.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings:
as shown in figure 1, the hydraulic buffer device for the center frame of the heavy machine tool mainly comprises a center frame base 1, a hydraulic buffer jacking mechanism and an adjusting mechanism. The centre frame generally comprises a centre frame upper body and a centre frame base 1, wherein a top holding piece on the centre frame base 1 is a main bearing part of a workpiece, and the top holding piece is also the most easily damaged.
The center frame base 1 provides support for the hydraulic buffering jacking mechanism, and the center frame base 1 is provided with an accommodating space for the sliding of the hydraulic buffering jacking mechanism and the action during the alignment operation of the hydraulic buffering jacking mechanism, and the specific structure can refer to the structure shown in the attached drawing.
The hydraulic buffer jacking mechanism is arranged on the center frame base 1; the hydraulic buffer jacking mechanism comprises an adjustable jacking piece 2 and a hydraulic buffer seat 3; the adjustable jacking piece 2 is columnar and is in sliding fit with the center frame base 1, and the whole adjustable jacking piece 2 can slide relative to the center frame base 1, so that the adjustable jacking piece 2 can be matched with the hydraulic buffer base 3 to realize a buffer effect after being instantly loaded; the hydraulic buffer seat 3 is fixed on the center frame base 1 and is supported against the end part of the adjustable supporting piece 2.
Specifically, the adjustable jacking piece 2 comprises a jacking head 4, a gear sleeve 7, a nut sleeve 10 and an end seat 11; the jacking head 4 is columnar, one end of the jacking head is provided with a contact 5 for contacting a workpiece, the other end of the jacking head is provided with a screw rod 6 with the diameter different from that of the jacking head 4, and the screw rod 6 is smaller than the diameter of the jacking head 4; the jacking head 4 is in sliding fit with the center frame base 1, specifically in a shaft/hole fit mode, and a matched slide way on the center frame base 1 is utilized to provide guidance for the axial movement of the jacking head 4; the gear sleeve 7 comprises a sleeve 8 in sliding fit with the center frame base 1 and a first gear 9 arranged outside the sleeve 8; the sleeve 8 is supported on a matched slide way on the center frame base 1 to provide guidance during axial movement, the sleeve 8 can circumferentially rotate relative to the center frame base 1, and the sleeve 8 is sleeved on the outer side of the screw rod 6; the nut sleeve 10 is fixed on the inner side of one end of the sleeve 8 and matched with the screw rod 6, and the sleeve 8 rotates to drive the nut sleeve 10 to synchronously rotate; end seat 11 establishes at the sleeve 8 other end and with centre frame base 1 sliding fit, and end seat 11 can adopt bolted connection fixed with the sleeve 8 other end, and end seat 11 and sleeve 8 need rotate and synchronous axial displacement in step, for reducing frictional resistance, can add slide bearing 27 in the end seat 11 and the sleeve 8 butt joint department outside, still can make things convenient for adjustment mechanism application of force drive sleeve 8 to rotate after frictional resistance reduces, reduces the resistance that adjustment mechanism adjusted the operation.
Specifically, the hydraulic buffer seat 3 comprises a hydraulic oil cylinder 12 and a rotating seat 13; the hydraulic oil cylinder 12 is fixed on the center frame base 1 and is correspondingly arranged below the end seat 11; a back pressure valve is arranged on an oil discharge pipeline of the hydraulic oil cylinder 12, when the pressure borne by the hydraulic oil cylinder 12 reaches a certain value, the hydraulic oil can be automatically discharged through the back pressure valve, so that the purpose of pressure relief and buffering is achieved, the hydraulic oil cylinder 12 can be connected into a machine tool hydraulic system for control, and can also be connected into an external hydraulic system for control, for example, an external hydraulic station for hydraulic control; the hydraulic oil cylinder 12 specifically comprises a cylinder body 14, a flange 15 arranged at the end part of the cylinder body 14, a piston 16 matched with the cylinder body 14, and a piston rod 17 arranged on the piston 16 and extending to the outer side of the cylinder body 14 through the flange 15; the cylinder body 14 is fixed on the center frame base 1 through bolt connection, and the flange plate 15 is fixed at the end part of the cylinder body 14 through bolt connection; the free end of the piston rod 17 is processed to be in a stepped shaft shape, and a large-diameter shaft section, a middle-diameter shaft section and a small-diameter shaft section are formed, so that the free end of the piston rod is conveniently matched with the rotating seat 13; the rotating seat 13 is arranged at the end part of the hydraulic oil cylinder 12 and is supported on the end seat 11; the rotating seat 13 specifically comprises a thrust roller bearing 18, a top block 19 and a deep groove ball bearing 20; the thrust roller bearing 18 is sleeved on the large-diameter shaft section of the free end of the piston rod 17, the top block 19 is in a step shape with a cylindrical inner wall, the top block 19 is sleeved on the middle-diameter shaft section of the free end of the piston rod 17 and presses the thrust roller bearing 18, the deep groove ball bearing 20 is installed between the small-diameter shaft section of the free end of the piston rod 17 and the inner wall of the top block 19, the rotary seat 13 can bear axial load by using the thrust roller bearing 18, meanwhile, the smooth circumferential rotation of the rotary seat 13 can be ensured after the deep groove ball bearing 20 is matched, and the resistance effect of the synchronous rotation of the rotary seat 13 and the end seat 11 on the end seat 11 can be reduced.
The adjusting mechanism is used for controlling the rotation of the adjustable supporting piece 2, is arranged on the center frame base 1 and acts on a first gear 9 of the adjustable supporting piece 2; the adjusting mechanism comprises a first transmission shaft 21 which is arranged in parallel with the axial lead of the gear sleeve 7 and is hinged on the center frame base 1, a second gear 22 which is arranged on the first transmission shaft 21 and is meshed with the first gear 9, a third gear 23 which is arranged on the first transmission shaft 21, a fourth gear 24 which is meshed with the third gear 23, and a second transmission shaft 25 which is hinged on the center frame base 1 and is fixedly connected with the fourth gear 24; two ends of the first transmission shaft 21 are hinged with the center frame base 1 through bearings, the lower end of the first transmission shaft 21 is matched with an end cover, and the end cover is connected with the center frame base 1, so that the first transmission shaft 21 is convenient to assemble; the first gear 9 and the second gear 22 are both straight toothed spur gears; a limiting stop disc 26 is arranged on the upper side of the second gear 22, the limiting stop disc 26 is fixed on the side surface of the second gear 22 in a screw connection mode, the limiting stop disc 26 acts on one side of the first gear 9, the limiting stop disc 26 can limit the first gear 9 and prevent the first gear 9 from being separated from the second gear 22 when the first gear 9 moves axially; the width of the second gear 22 is larger than that of the first gear 9, so that a certain moving stroke can be provided for the axial movement of the first gear 9; the third gear 23 and the fourth gear 24 are bevel gears and are used for changing the action position of a second transmission shaft 25, the second transmission shaft 25 is hinged in a cylinder body through a bearing, and the cylinder body is fixed on the center frame base 1; one end of the second transmission shaft extends to the outer side of the center frame base, and the second transmission shaft 25 can be manually controlled by matching an external hand wheel or an operating rod with one end of the second transmission shaft 25 and can also be automatically controlled by an external speed reducing motor.
The utility model discloses a theory of operation: firstly, a hydraulic system controls a hydraulic oil cylinder 12 to act, so that a rotating seat 13 props against an end seat 11 to move, and then the whole adjustable propping piece 2 moves relative to a center frame base 1 until a contact 5 contacts with a workpiece; then a lifting appliance or other temporary supporting devices of the workpiece are removed, the workpiece can instantaneously act on the adjustable supporting piece 2, when the acting force is greater than the set value of the backpressure valve, the backpressure valve is opened, the hydraulic oil cylinder 12 discharges oil, the workpiece covers the adjustable supporting piece 2 to move downwards, and then the acting force of a part of the workpiece is buffered, so that the situation that all the acting force of the workpiece instantaneously acts between the screw rod 6 and the nut sleeve 10 is avoided, and the effect of protecting the screw rod 6 and the nut sleeve 10 is achieved, and the backpressure valve has the characteristic of adjustable pressure, so that the opening pressure of the backpressure valve can be properly adjusted according to the weight of the workpiece; when the hydraulic oil cylinder 12 finishes buffering, the piston 16 is positioned at the bottom of the cylinder body 14, and the downward stopping of the jacking piece 2 can be adjusted; at the moment, the workpiece alignment operation can be carried out, and in the alignment operation process, the second transmission shaft 25 is rotated to realize the fine adjustment of the jacking head 4; the fine adjustment principle of the jacking head 4 is as follows: when the second transmission shaft 25 rotates, the first transmission shaft 21 is driven to rotate by the cooperation of the fourth gear 24 and the third gear 23, the sleeve 8 is driven to rotate by the first transmission shaft 21 by the cooperation of the second gear 22 and the first gear 9, the sleeve 8 drives the nut sleeve 10 to rotate, the nut sleeve 10 is matched with the lead screw 6, meanwhile, the jacking head 4 is extruded by a workpiece and is circumferentially stopped, the screw sleeve 10 can be used for driving the lead screw 6 to axially move, and then the workpiece can be adjusted by the jacking head 4.
Claims (6)
1. A heavy machine tool center frame hydraulic buffer device is characterized by comprising:
a steady base (1);
the hydraulic buffer jacking mechanism is arranged on the center frame base (1) and comprises an adjustable jacking piece (2) and a hydraulic buffer seat (3); the adjustable jacking piece (2) is columnar and is in sliding fit with the center frame base (1), and the hydraulic buffer seat (3) is fixed on the center frame base (1) and is jacked at the end part of the adjustable jacking piece (2); and
the adjusting mechanism is arranged on the center frame base (1) and acts on the adjustable jacking piece (2).
2. A heavy machine tool steady rest hydraulic damping device according to claim 1, characterized in that the adjustable holding member (2) comprises:
the jacking head (4) is columnar, one end of the jacking head is provided with a contact (5) used for contacting a workpiece, the other end of the jacking head is provided with a screw rod (6) with the diameter different from that of the jacking head (4), and the jacking head (4) is in sliding fit with the center frame base (1);
the gear sleeve (7) comprises a sleeve (8) in sliding fit with the center frame base (1) and a first gear (9) arranged on the outer side of the sleeve (8), and the sleeve (8) is sleeved on the outer side of the screw rod (6);
the nut sleeve (10) is fixed on the inner side of one end of the sleeve (8) and is matched with the screw rod (6); and
and the end seat (11) is arranged at the other end of the sleeve (8) and is in sliding fit with the center frame base (1).
3. A heavy machine tool steady rest hydraulic damping device according to claim 2, characterized in that the hydraulic damping mount (3) comprises:
the hydraulic oil cylinder (12) is fixed on the center frame base (1) and corresponds to the lower part of the end seat (11), and a back pressure valve is arranged on an oil discharge pipeline of the hydraulic oil cylinder (12);
and a rotating base (13) which is arranged at the end part of the hydraulic oil cylinder (12) and is supported against the end base (11).
4. The hydraulic buffer device for the center frame of the heavy machine tool as claimed in claim 3, wherein the hydraulic cylinder (12) comprises a cylinder body (14), a flange (15) arranged at the end part of the cylinder body (14), a piston (16) matched with the cylinder body (14), and a piston rod (17) arranged on the piston (16) and extending to the outer side of the cylinder body (14) through the flange (15); the free end of the piston rod (17) is in a stepped shaft shape and is provided with a large-diameter shaft section, a middle-diameter shaft section and a small-diameter shaft section.
5. A heavy machine tool centre frame hydraulic damping device according to claim 4, characterized in that the swivel (13) comprises thrust roller bearings (18), a top block (19) and deep groove ball bearings (20); the thrust roller bearing (18) is sleeved on the large-diameter shaft section of the free end of the piston rod (17), the ejector block (19) is sleeved on the middle-diameter shaft section of the free end of the piston rod (17) and covers the thrust roller bearing (18) in a pressing mode, and the deep groove ball bearing (20) is installed between the small-diameter shaft section of the free end of the piston rod (17) and the inner wall of the ejector block (19).
6. The hydraulic buffer device of the center frame of the heavy machine tool as claimed in claim 2, characterized in that the adjusting mechanism comprises a first transmission shaft (21) arranged in parallel with the axis of the gear sleeve (7) and hinged on the center frame base (1), a second gear (22) arranged on the first transmission shaft (21) and meshed with the first gear (9), a third gear (23) arranged on the first transmission shaft (21), a fourth gear (24) meshed with the third gear (23), and a second transmission shaft (25) hinged on the center frame base (1) and fixedly connected with the fourth gear (24); one end of the second transmission shaft (25) extends to the outer side of the center frame base (1), the tooth width of the second gear (22) is larger than that of the first gear (9), a limiting blocking disc (26) is arranged on one side of the second gear (22), and the limiting blocking disc (26) acts on one side of the first gear (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022270622.XU CN213899728U (en) | 2020-10-13 | 2020-10-13 | Hydraulic buffering device for center frame of heavy machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022270622.XU CN213899728U (en) | 2020-10-13 | 2020-10-13 | Hydraulic buffering device for center frame of heavy machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213899728U true CN213899728U (en) | 2021-08-06 |
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ID=77112809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022270622.XU Active CN213899728U (en) | 2020-10-13 | 2020-10-13 | Hydraulic buffering device for center frame of heavy machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213899728U (en) |
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2020
- 2020-10-13 CN CN202022270622.XU patent/CN213899728U/en active Active
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20240522 Address after: No. 41 East Road, Shetang Town, Maiji District, Tianshui City, Gansu Province, 741020 Patentee after: Gansu Xinghuo Intelligent CNC Machine Tool Co.,Ltd. Country or region after: China Address before: SHETANG road 741000 Gansu province Tianshui Maiji District No. 41 Patentee before: Tianshui Spark Machine Tool Co.,Ltd. Country or region before: China |