CN216370182U - Straight-through hydraulic tailstock - Google Patents
Straight-through hydraulic tailstock Download PDFInfo
- Publication number
- CN216370182U CN216370182U CN202123277683.XU CN202123277683U CN216370182U CN 216370182 U CN216370182 U CN 216370182U CN 202123277683 U CN202123277683 U CN 202123277683U CN 216370182 U CN216370182 U CN 216370182U
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- Prior art keywords
- tailstock
- straight
- hydraulic
- tailstock body
- cylinder
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- 239000000945 filler Substances 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a straight-through hydraulic tailstock, which comprises a tailstock body and a hydraulic cylinder, wherein a front shaft sleeve is arranged in an inner cavity of the tailstock body, a mandrel is arranged in the inner cavity of the tailstock body, a rear shaft sleeve is sleeved on an outer ring of the mandrel, a threaded column is fixedly connected to the front surface of the hydraulic cylinder, and a cylinder is in threaded connection with an outer ring of the threaded column. And the functions of fast forward, single forward, fast backward and the like are easily realized, the conditions of creeping, blocking and the like do not occur, the operation is easy and convenient, the stress of the shaft core is mainly improved, and the rigidity, the precision and the smoothness are improved. And the disassembly is convenient, and the maintenance cost is low.
Description
Technical Field
The utility model relates to the technical field of machining, in particular to a straight-through hydraulic tailstock.
Background
The hydraulic tailstock is usually used for a numerical control lathe, a numerical control milling machine and a turning and milling composite machine tool, when shaft parts are machined, when the parts are too long, clamping of long shaft parts is removed only by a chuck, the condition of tool shaking can occur, accuracy is difficult to control in the machining process, and the long shaft parts can be effectively prevented from vibrating in the machining process by using the hydraulic tailstock to push one clamp.
The existing hydraulic tailstock is pushed by built-in oil pressure, only the front end is stressed, the rigidity has certain influence, and after a period of time, the tailstock and a sealing ring of a mandrel are easily abraded to leak oil, so that the tailstock is unsmooth or blocked, is not durable, and the precision is difficult to guarantee. And after the tailstock body is worn and damaged, the tailstock body can be maintained only by integrally disassembling, so that the tailstock is high in cost and not beneficial to maintenance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a straight-through hydraulic tailstock, which aims to solve the problems that the prior hydraulic tailstock proposed in the background art is pushed by built-in oil pressure, only the front end is stressed, the rigidity has certain influence, and after a period of time, a sealing ring of the tailstock and a mandrel is easy to abrade oil leakage, unsmooth or stuck, not durable and difficult to ensure the precision. And after the tailstock body is worn and damaged, the tailstock body needs to be integrally disassembled to be repaired, so that the cost is high, and the tailstock body is not beneficial to the maintenance problem.
In order to achieve the purpose, the utility model provides the following technical scheme: the straight-through hydraulic tailstock comprises a tailstock body and a hydraulic cylinder, wherein a front shaft sleeve is arranged in an inner cavity of the tailstock body, a mandrel is arranged in the inner cavity of the tailstock body, a rear shaft sleeve is sleeved on an outer ring of the mandrel, a threaded column is fixedly connected to the front surface of the hydraulic cylinder, and a cylinder is connected to the outer ring of the threaded column in a threaded manner.
Preferably, the front surfaces of the front shaft sleeve and the rear shaft sleeve are provided with reserved holes.
Preferably, a first oil filler hole is formed in the top of the tailstock body, an arc groove is formed in the outer ring of the mandrel, and a second oil filler hole is formed in the inner cavity of the arc groove.
Preferably, the outer ring of the hydraulic cylinder is fixedly connected with a disc, the back of the disc is fixedly connected with a threaded rod, and the outer ring of the threaded rod is fixedly connected with a cushion block.
Compared with the prior art, the utility model has the beneficial effects that:
1. this straight-through hydraulic tailstock, through preceding axle sleeve 3 and the cooperation of back axle sleeve 5 and 1 hole of tailstock body and dabber 4, the axle sleeve external diameter should cooperate the axle sleeve hole with the inner chamber of tailstock should cooperate with dabber 4, at the back mounted pneumatic cylinder 2 of axle sleeve 5, through the inner chamber of installing preceding axle sleeve 3 with the thimble, start through pneumatic cylinder 2, pneumatic cylinder 2 drives the motion of dabber 4, and the motion of dabber 4 drives the thimble motion, connects the top tightly with major axis class.
2. The straight-through hydraulic tailstock is characterized in that a front shaft sleeve and a rear shaft sleeve support a mandrel, an oil hydraulic cylinder connecting nut is connected with the oil hydraulic cylinder and the mandrel to control the advancing and the retreating, so that the friction between a tailstock body and the mandrel does not exist, the oil leakage condition is solved, the front end and the rear end of the straight-through hydraulic tailstock are supported, and the precision, the rigidity and the stability are improved. And the functions of fast forward, single forward, fast backward and the like are easily realized, the conditions of creeping, blocking and the like do not occur, the operation is easy and convenient, the stress of the shaft core is mainly improved, and the rigidity, the precision and the smoothness are improved. And the disassembly is convenient, and the maintenance cost is low.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a front view of a straight-through hydraulic tailstock according to the present invention.
Fig. 3 is a top view of a straight-through hydraulic tailstock according to the present invention.
Fig. 4 is a bottom view of a straight-through hydraulic tailstock according to the present invention.
Fig. 5 is a rear view of a straight-through hydraulic tailstock according to the present invention.
In the figure: 1. a tailstock body; 2. a hydraulic cylinder; 3. a front shaft sleeve; 4. a mandrel; 5. a rear shaft sleeve; 6. a threaded post; 7. a cylinder; 8. reserving a hole; 9. a first oil filler hole; 10. an arc groove; 11. a second oil filler hole; 12. a disc; 13. a threaded rod; 14. and a cushion block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a straight-through hydraulic tailstock, includes tailstock body 1 and pneumatic cylinder 2, and 1 inner chamber of tailstock body is provided with preceding axle sleeve 3, and the inner chamber of tailstock body 1 is provided with dabber 4, and the outer lane cover of dabber 4 is equipped with back axle sleeve 5, the positive fixed connection screw post 6 of pneumatic cylinder 2, and the outer lane threaded connection of screw post 6 has cylinder 7.
Wherein, the front of preceding axle sleeve 3 and back axle sleeve 5 has all been seted up and has been reserved hole 8.
In the embodiment, the front shaft sleeve 3 and the rear shaft sleeve 5 are made of 45# and subjected to heat treatment HRC45, so that the strength and the wear resistance are improved. The front shaft sleeve 3 and the rear shaft sleeve 5 are matched with the hole of the tailstock body 1 and the mandrel 4, the outer diameter of the shaft sleeve is matched with the hole of the tailstock, the shaft sleeve cannot be too tight or too loose, and the gap amount is 0.01 MM. The axle sleeve hole should cooperate with the dabber, and the axle sleeve hole is the important part that the dabber gos forward back, so 3 front ends of preceding axle sleeve design sealing washers mainly for waterproof, dustproof effect to all need to make a 3 MM's oil groove in the middle of 5 of front and back axle sleeve, so that lubricate. The coaxiality of both ends is guaranteed to be 0.005MM, and the roughness is Ra0.8.
Wherein, the first oil filler point 9 has been seted up at the top of tailstock body 1, and the circular arc groove 10 has been seted up to the outer lane of dabber 4, and the second oil filler point 11 has been seted up to the inner chamber in circular arc groove 10.
In this embodiment, the material of the tailstock body 1 is formed by HT250 casting, through the reasonable arrangement of the internal lacing wires of the tailstock, the rigidity of the tailstock is improved, through good aging treatment, the thermal deformation is small, the rigidity is high, the anti-seismic performance is good, the precision retentivity is good, the machining process is considered in the design process of the tailstock body 1, a process boss and a process hole need to be designed, the machining is convenient, and according to the actual use requirement, during machining, the tailstock hole ensures that the positioning reference surface is ensured, the hole diameter is 98MM, the hole is ensured to be 0.005MM perpendicular to the end surface, the reference hole system is adopted in the matching of the front shaft sleeve, the rear shaft sleeve and the tailstock body hole, therefore, the clearance is very small, and the clearance amount is 0.01 MM. The material of the mandrel 4 is selected from 40cr, heat treatment is performed on HRC58, the strength, elasticity and wear resistance are improved, the mandrel 4 is connected with the hydraulic cylinder 2 through a connecting nut, the front end of the hydraulic cylinder 2 is provided with M22X1.5 threads, and therefore the internal threads of the connecting nut are also M22X1.5. This facilitates the connection of the hydraulic cylinder 2 to the spindle 4. The outer diameter of the mandrel 4 is designed to be 80mm, the total length is 350mm, the using stroke is 100mm, the front inner hole adopts Morse No. 5 taper, the strength is increased, the roughness is Ra0.8, and the mandrel is required to be tightly matched with a tip. A hole 5 is drilled in the middle to allow air to escape. The opposite side of the hole is provided with a positioning groove with the length of 122MM, and the purpose is to prevent rotation.
Wherein, the outer ring of the hydraulic cylinder 2 is fixedly connected with a disc 12, the back of the disc 12 is fixedly connected with a threaded rod 13, and the outer ring of the threaded rod 13 is fixedly connected with a cushion block 14
In the present embodiment, the stroke used by the mandrel is 100MM, so the stroke of the hydraulic cylinder is also selected as 100MM, the maximum pressure of the hydraulic system is 3.0MPA, the durability of the hydraulic cylinder is considered, if the cylinder diameter is selected as 50MM, the pressure resistance is 70kG, the front end of the piston rod is M22X1.5, so the piston rod is also 22MM, whether the thrust force and the tension force of the hydraulic cylinder to be used are sufficient or not is calculated, the weight of the mandrel is the diameter X X0.00617X (meter), the length is 80X80X0.00617X0.35 is 13.8kG, the radius of the cylinder diameter is R (unit MM), the radius of the piston rod is R (unit MM), the pressure during operation is P (unit MPA), the thrust force F of the cylinder is 3.14 xrxrxrxrxp (unit N), the tension force F of the cylinder is 3.14X (RXR-rXr) XP (unit N), the P is 3.0MPA is 30kgf/CM2, the R25 is 2.5CM, the R is 1.11X (meter), the CM is 1.1, the CM 3.3.3.3 CM 3.3.3 MM/CM 3 g/3.3, the hydraulic cylinder with the estimated selection cylinder diameter of 50MM, which is equal to or more than 588.75 ÷ 9.8 ≈ 60KG >. 13.8KG, Fla ═ 3.14X [ (2.5X2.5) - (1.1X1.1) ] X30 ═ 474.768N, 474.768 ÷ 9.8 ≈ 48KG >. 13.8KG, can be used satisfactorily.
The working principle is as follows: through preceding axle sleeve 3 and the cooperation of back axle sleeve 5 and 1 hole of tailstock body and dabber 4, the axle sleeve external diameter should cooperate with dabber 4 with the inner chamber cooperation axle sleeve hole of tailstock, at the back mounted pneumatic cylinder 2 of back axle sleeve 5, through installing the inner chamber of preceding axle sleeve 3 with the thimble, through pneumatic cylinder 2 start-up, pneumatic cylinder 2 drives the motion of dabber 4, and the motion of dabber 4 drives the thimble motion, connects the top tightly with major axis class.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a straight-through hydraulic tailstock, includes tailstock body (1) and pneumatic cylinder (2), its characterized in that: the tailstock body (1) inner chamber is provided with preceding axle sleeve (3), the inner chamber of tailstock body (1) is provided with dabber (4), the outer lane cover of dabber (4) is equipped with back axle sleeve (5), the positive fixed connection screw thread post (6) of pneumatic cylinder (2), the outer lane threaded connection of screw thread post (6) has cylinder (7).
2. A straight-through hydraulic tailstock according to claim 1, characterized in that: the front surfaces of the front shaft sleeve (3) and the rear shaft sleeve (5) are provided with preformed holes (8).
3. A straight-through hydraulic tailstock according to claim 1, characterized in that: first oil filler point (9) have been seted up at the top of tailstock body (1), circular arc groove (10) have been seted up to the outer lane of dabber (4), second oil filler point (11) have been seted up to the inner chamber in circular arc groove (10).
4. A straight-through hydraulic tailstock according to claim 1, characterized in that: the outer ring fixedly connected with disc (12) of pneumatic cylinder (2), the equal fixedly connected with threaded rod (13) in back of disc (12), the outer ring fixedly connected with cushion (14) of threaded rod (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123277683.XU CN216370182U (en) | 2021-12-23 | 2021-12-23 | Straight-through hydraulic tailstock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123277683.XU CN216370182U (en) | 2021-12-23 | 2021-12-23 | Straight-through hydraulic tailstock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216370182U true CN216370182U (en) | 2022-04-26 |
Family
ID=81237966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123277683.XU Expired - Fee Related CN216370182U (en) | 2021-12-23 | 2021-12-23 | Straight-through hydraulic tailstock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216370182U (en) |
-
2021
- 2021-12-23 CN CN202123277683.XU patent/CN216370182U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220426 |