A knife-beating cylinder with central water outlet function

Abstract

The knife-beating cylinder with a central water outlet function disclosed in the present invention comprises a knife-beating mechanism and a central water outlet mechanism, wherein the knife-beating mechanism comprises a hollow and coaxially arranged knife-beating piston, a cylinder body, a cylinder seat, a cylinder pressure cover and a base, wherein the knife-beating piston is arranged in the inner hole of the cylinder body, the cylinder pressure cover, the cylinder body and the knife-beating piston form a knife-loosening oil chamber, and the cylinder body and the knife-beating piston form a knife-clamping oil chamber, and the central water outlet mechanism comprises a central water outlet piston, a rotary joint and a central water outlet pressure cover, wherein the central water outlet piston is arranged in the inner hole of the cylinder pressure cover and fixed on the knife-beating piston, and the rotary joint is arranged on the inner side of the central water outlet piston, and the storage chamber, the rotary joint and the central hole of the knife-pulling rod formed by the central water outlet pressure cover, the cylinder pressure cover, the central water outlet piston and the rotary joint are sequentially connected, and the front end of the central hole of the knife-pulling rod directly reaches the front end of the main shaft. The present invention embeds the central water outlet mechanism in the knife-beating mechanism, greatly releasing the axial space of the main shaft, and can effectively reduce the axial length of the main shaft.

Description

Technical Field

[0001] The invention relates to a numerical control machine tool accessory, in particular to a knife-beating cylinder with a central water outlet function. Background Art

[0002] The tool-breaking cylinder is a common functional structure of the spindle, which provides external thrust for the loosening and clamping of the tool-pulling claws during the spindle tool change process. The center water outlet function means that during the processing, the coolant enters from the rotary joint at the rear end of the spindle and is finally ejected from the through hole built into the center of the tool to achieve the function of cooling the processing process.

[0003] The existing spindle center water outlet structure is usually: a slender hollow rod, one end of which is installed at the rear end of the spindle and extends backward, and the other end passes through the center of the knife cylinder and is then connected to a rotary joint. The rotary joint is generally installed at the rear end of the knife cylinder to realize the center water outlet function. That is, the knife cylinder part and the center water outlet part are two separate functional structures, each performing its own duties and completing their own functions. In terms of space, the rotary joint is installed at the rear end of the knife cylinder (i.e., the rear end of the spindle), which often leads to an increase in the axial length of the spindle, including some water inlet and drainage pipes of the rotary joint, which also occupy a certain amount of space at the rear end of the spindle. Such a structure brings great difficulties to working conditions with special requirements for the axial length, because some spindles have special requirements for the axial length of the spindle during installation. For example, the increase in the axial length of the vertical spindle will increase the height of the spindle at the extreme position accordingly, resulting in an increase in the overall height of the machine tool; for example, during the rotation of the swing head spindle, the axial length of the spindle is too long, which will increase the rotation interference area. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a knife-beating cylinder with a central water outlet function in view of the shortcomings of the prior art, wherein the knife-beating mechanism and the central water outlet mechanism almost completely overlap in the axial space, which greatly releases the axial space of the main shaft and can effectively reduce the axial length of the main shaft.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a knife-beating cylinder with a central water outlet function, including a knife-beating mechanism and a central water outlet mechanism, the knife-beating mechanism including a hollow and coaxially arranged knife-beating piston, a cylinder body, a cylinder seat, a cylinder pressure cover and a base, the front end of the base is installed on the outer wall of the cylinder body, the rear end of the base is installed on the rear end of the hollow waterproof joint, the waterproof joint is arranged on the outside of the rear end of the main shaft, the cylinder seat is installed on the inner side of the base, the cylinder body is installed on the rear end of the cylinder seat, the knife-beating piston is arranged in the inner hole of the cylinder body, the front end of the knife-beating piston is opposite to the rear end of the knife-pulling rod arranged on the inner side of the main shaft, the cylinder pressure cover is installed on the rear end of the cylinder body, the cylinder pressure cover, the cylinder body and the knife-beating piston form a knife loosening oil chamber, and the cylinder body and the knife-beating piston form a knife clamping oil chamber The tool loosening oil chamber and the tool clamping oil chamber are respectively communicated with the main shaft hydraulic oil pipeline, the central water outlet mechanism comprises a central water outlet piston, a rotary joint and a central water outlet pressure cover, the central water outlet piston is arranged in the inner hole of the oil cylinder pressure cover and fixed on the tool beating piston, the rear end of the central water outlet piston is installed with a hollow mounting block, the rotary joint is installed on the inner side of the mounting block and is arranged on the inner side of the central water outlet piston, the central water outlet pressure cover is installed on the rear end of the oil cylinder pressure cover, the central water outlet pressure cover, the oil cylinder pressure cover, the central water outlet piston and the rotary joint form a storage chamber, the inlet of the storage chamber is communicated with the main shaft cutting fluid pipeline, the outlet of the storage chamber is communicated with the inlet of the rotary joint, the outlet of the rotary joint is communicated with the central hole of the broaching rod, and the front end of the central hole of the broaching rod directly reaches the front end of the main shaft.

[0006] Preferably, a collision block is installed at the front end of the knife-beating piston by screws, a first adjustment block is pressed between the collision block and the knife-beating piston, an induction ring is installed at the rear end of the knife-pulling rod, the induction ring is opposite to the collision block, and a plurality of second adjustment blocks are installed on the front and rear of the cylinder seat, each of the second adjustment blocks is installed with an induction switch, and the plurality of induction switches are respectively adapted to the induction ring. When the knife-beating piston moves forward together with the collision block, the collision block contacts the induction ring, pushing the induction ring and the knife-pulling rod to move toward the front end of the spindle to realize the knife-loosening action; similarly, when the knife-beating piston moves backward together with the collision block, the collision block separates from the induction ring, and the knife-pulling rod is reset under the action of the disc spring to realize the knife-clamping action. During the knife-loosening and knife-clamping process, when the knife is loosened, the induction ring moves forward to trigger an induction switch; when the knife is clamped, the induction ring resets backward to trigger another induction switch. Through the induction switches at different positions, the different positions of the induction ring are judged, and the knife-loosening and knife-clamping state of the spindle is obtained. The first adjustment block can adjust the distance between the collision block and the induction ring, thereby adjusting the telescopic distance of the broaching rod. The second adjustment block can adjust the position of the induction switch to achieve the induction of the induction ring by the induction switch.

[0007] Preferably, a cutting fluid transmission unit is provided between the spindle cutting fluid pipeline and the storage cavity, and the cutting fluid transmission unit comprises a first inlet hole, a second inlet hole and a third inlet hole, and the first inlet hole, the second inlet hole and the third inlet hole are respectively provided on the oil cylinder seat, the oil cylinder body and the oil cylinder gland, and the first inlet hole is communicated with the spindle cutting fluid pipeline, and the first inlet hole, the second inlet hole, the third inlet hole and the entrance of the storage cavity are communicated in sequence. After the above-mentioned cutting fluid transmission unit is designed, the cutting fluid from the spindle cutting fluid pipeline enters the rear end of the spindle from the front end of the spindle, passes through the first inlet hole, the second inlet hole and the third inlet hole, and finally enters the storage cavity, and then enters the central hole of the rotary joint and the broaching rod from the storage cavity, leading to the front end of the spindle, realizing the central water outlet function, that is, the tool internal cooling function. After the above-mentioned cutting fluid transmission unit is adopted, the water inlet of the spindle central water outlet is not provided at the rear end of the spindle, which can further shorten the length of the rear end of the spindle.

[0008] Preferably, a hydraulic oil transmission unit is provided between the spindle hydraulic oil pipeline and the knife loosening oil chamber and the knife clamping oil chamber, respectively. Each of the hydraulic oil transmission units includes a first oil hole, a second oil hole and a third oil hole. The first oil hole, the second oil hole and the third oil hole are respectively provided on the oil cylinder seat, the oil cylinder body and the oil cylinder gland. The first oil hole is communicated with the spindle hydraulic oil pipeline, and the first oil hole, the second oil hole and the third oil hole are communicated in sequence. The third oil holes of the two hydraulic oil transmission units are communicated with the knife loosening oil chamber and the knife clamping oil chamber, respectively. When loosening the knife, the hydraulic oil from the spindle hydraulic oil pipeline flows from the front end of the spindle into the hydraulic oil transmission unit matched with the knife loosening oil chamber, passes through the corresponding first oil hole, the second oil hole and the third oil hole into the knife loosening oil chamber, so that the knife beating piston moves forward under the action of oil pressure. Similarly, when clamping the tool, the hydraulic oil from the main shaft hydraulic oil pipeline flows from the front end of the main shaft into the hydraulic oil transmission unit matched with the tool clamping oil chamber, and enters the tool clamping oil chamber through the corresponding first oil hole, second oil hole, and third oil hole, so that the tool-breaking piston retreats and resets. The above hydraulic oil transmission unit is also conducive to shortening the length of the rear end of the main shaft.

[0009] Preferably, a first cavity is provided on the inner side of the cylinder seat, a second cavity is provided between the outer side of the cylinder seat and the inner side of the base, a drain port communicating with the outside is provided on the cylinder seat, a first drain hole is provided on the cylinder seat, and the first cavity and the second cavity are communicated with each other through the first drain hole; a water retaining ring is installed on the inner side of the front end of the base, the front end of the water retaining ring is installed on the inner side of the rear end of the waterproof joint, a waterproof ring is installed on the inner side of the rear end of the waterproof joint, the waterproof ring is located on the inner side of the water retaining ring, a waterproof cover is installed on the rear end of the main shaft, a first ring groove and a second ring groove with a front end opening are respectively provided on the waterproof cover, the first ring groove is located on the inner side of the second ring groove, and the waterproof cover is buckled between the water retaining ring and the On the waterproof ring, the rear end of the waterproof ring extends into the first ring groove to form a waterproof maze, the rear end of the water retaining ring extends into the second ring groove to form a waterproof maze, the outer wall of the water retaining ring is provided with a third ring groove, the third ring groove is communicated with the first drainage hole, a first sealing ring is installed between the front end of the water retaining ring and the rear end of the waterproof joint, a second sealing ring is installed between the waterproof ring and the rear end of the waterproof joint, a third sealing ring is installed between the waterproof cover and the rear end of the main shaft, a fourth sealing ring is installed between the main shaft and the broaching rod, a fourth ring groove is provided on the outer wall of the waterproof ring, the rear end of the waterproof joint is provided with a third cavity and a second drainage hole, the fourth ring groove, the third cavity and the second drainage hole are communicated in sequence, and the second drainage hole is communicated with the outside world. In the above scheme, the water retaining ring and the waterproof ring form a double water retaining structure with concave and convex nesting. When liquid leaks from the knife-beating mechanism or the rotary joint, it first enters the first cavity. The concave-convex waterproof labyrinth structure composed of the water retaining ring and the second ring groove can prevent most of the liquid from entering the interior of the main shaft, so that the liquid enters the second cavity through the first drainage hole and is discharged through the drainage port. The third ring groove on the outer wall of the water retaining ring plays a role in blocking the liquid from crawling along the outer wall of the water retaining ring. Combined with the first sealing ring, it can completely block the liquid from penetrating into the main shaft. The water retaining ring and the corresponding sealing structure constitute the first line of defense for waterproofing the main shaft. When some liquid passes through the blocking of the first line of defense, the second line of defense composed of the waterproof ring and the waterproof cover can play a further blocking role. The concave-convex waterproof labyrinth structure composed of the waterproof ring and the first ring groove can prevent the liquid from continuing to enter the interior of the main shaft. At the same time, the fourth ring groove on the outer wall of the waterproof ring has the function of blocking the liquid from crawling along the outer wall of the waterproof ring. Combined with the second sealing ring, it can block the liquid from further penetrating into the main shaft, so that the liquid is discharged into the third cavity and discharged through the second drainage hole. The design of the above-mentioned waterproof and drainage structure can effectively block the liquid outside the main shaft.

[0010] Preferably, the waterproof ring is provided with an annular air channel and a sealed annular air cavity, the waterproof joint is provided with an air inlet, the air inlet, the annular air cavity, the annular air channel and the first annular groove are sequentially connected, and the air inlet is used to deliver compressed air to the annular air cavity. On the basis of the waterproof and drainage structure, the air inlet, the annular air cavity and the annular air channel constitute an air-sealing structure for forming a positive pressure to further block water vapor from flowing into the water retaining structure, thereby achieving a better waterproof effect and ensuring that water vapor does not enter the interior of the main shaft.

[0011] Preferably, a third adjustment block is provided between the axial direction of the central water outlet piston and the mounting block to adjust the axial position of the rotary joint.

[0012] Compared with the prior art, the present invention has the following advantages: the knife-beating cylinder of the present invention nests the central water outlet mechanism in the knife-beating mechanism, and the knife-beating mechanism and the central water outlet mechanism almost completely overlap in the axial space, which greatly releases the axial space of the main shaft and can effectively reduce the axial length of the main shaft. Furthermore, by optimizing the central water outlet mechanism and the drainage and waterproof structure, the present invention can further release the axial space of the main shaft, ensure that the main shaft has a smaller axial length, and at the same time help improve the reliability of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a part marking diagram after the knife-beating cylinder is installed in the embodiment;

[0014] Figure 2 This is a marked diagram of the cavity and channel after the knife-beating cylinder is installed in the embodiment. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to the accompanying drawings.

[0016] The knife-beating cylinder with a central water outlet function of embodiment 1, as shown in the figure, includes a knife-beating mechanism and a central water outlet mechanism. The knife-beating mechanism includes a hollow and coaxially arranged knife-beating piston 1, a cylinder body 2, a cylinder seat 3, a cylinder pressure cover 4 and a base 5. The front end of the base 5 is installed on the outer wall of the cylinder body 2, and the rear end of the base 5 is installed on the rear end of the hollow waterproof joint 62. The waterproof joint 62 is arranged on the outside of the rear end of the main shaft 6. The cylinder seat 3 is installed on the inner side of the base 5, and the cylinder body 2 is installed at the rear end of the cylinder seat 3. The knife-beating piston 1 is arranged in the inner hole of the cylinder body 2. The front end of the knife-beating piston 1 is opposite to the rear end of the knife-pulling rod 61 arranged on the inner side of the main shaft 6. The cylinder pressure cover 4 is installed at the rear end of the cylinder body 2. The cylinder pressure cover 4, the cylinder body 2 and the knife-beating piston 1 surround a knife loosening oil chamber 11. The cylinder body 2 and the knife-beating piston 1 surround a knife clamping oil chamber 12. 11 and the tool clamping oil chamber 12 are respectively communicated with the main shaft hydraulic oil pipeline, the central water outlet mechanism includes a central water outlet piston 7, a rotary joint 8 and a central water outlet pressure cover 9, the central water outlet piston 7 is arranged in the inner hole of the cylinder pressure cover 4 and fixed on the knife piston 1, the rear end of the central water outlet piston 7 is installed with a hollow mounting block 71, the rotary joint 8 is installed on the inner side of the mounting block 71 and is arranged on the inner side of the central water outlet piston 7, the central water outlet pressure cover 9 is installed at the rear end of the cylinder pressure cover 4, the central water outlet pressure cover 9, the cylinder pressure cover 4, the central water outlet piston 7 and the rotary joint 8 form a storage chamber 41, the inlet of the storage chamber 41 is communicated with the main shaft cutting fluid pipeline, the outlet of the storage chamber 41 is communicated with the inlet of the rotary joint 8, the outlet of the rotary joint 8 is communicated with the center hole 63 of the broaching rod 61, and the front end of the center hole 63 of the broaching rod 61 directly reaches the front end of the main shaft 6.

[0017] In Example 1, the contact points of the knife piston 1, cylinder body 2, cylinder seat 3, cylinder pressure cover 4, base 5, central water outlet piston 7, mounting block 71, rotary joint 8, central water outlet pressure cover 9 and other components are end-face sealed and equipped with sealing rings and other parts.

[0018] In Example 1, a collision block 13 is installed at the front end of the knife-beating piston 1 by means of screws, a first adjustment block 14 is pressed between the collision block 13 and the knife-beating piston 1, an induction ring 64 is installed at the rear end of the knife-pulling rod 61, the induction ring 64 is opposite to the collision block 13, a plurality of second adjustment blocks 31 are installed at the front and rear of the cylinder seat 3, each second adjustment block 31 is installed with an induction switch 32, and a plurality of induction switches 32 are respectively matched with the induction ring 64; a third adjustment block 33 is pressed between the axial direction of the central water outlet piston 7 and the mounting block 71.

[0019] In Example 1, a cutting fluid transmission unit is provided between the spindle cutting fluid pipeline and the storage chamber 41, and the cutting fluid transmission unit includes a first liquid inlet hole (not shown in the figure), a second liquid inlet hole 42 and a third liquid inlet hole 43, and the first liquid inlet hole, the second liquid inlet hole 42 and the third liquid inlet hole 43 are respectively provided on the cylinder seat 3, the cylinder body 2 and the cylinder gland 4, and the first liquid inlet hole is communicated with the spindle cutting fluid pipeline, and the first liquid inlet hole, the second liquid inlet hole 42, the third liquid inlet hole 43 and the entrance of the storage chamber 41 are communicated in sequence. A hydraulic oil transmission unit is respectively arranged between the spindle hydraulic oil pipeline and the tool loosening oil chamber 11 and the tool clamping oil chamber 12, each hydraulic oil transmission unit comprises a first oil hole, a second oil hole and a third oil hole, the first oil hole, the second oil hole and the third oil hole are respectively opened on the cylinder seat 3, the cylinder body 2 and the cylinder pressure cover 4, the first oil hole is communicated with the spindle hydraulic oil pipeline, the first oil hole, the second oil hole and the third oil hole are communicated with each other in sequence, and the third oil holes of the two hydraulic oil transmission units are respectively communicated with the tool loosening oil chamber 11 and the tool clamping oil chamber 12.

[0020] In Example 1, a first cavity 34 is provided on the inner side of the cylinder seat 3, a second cavity 51 is provided between the outer side of the cylinder seat 3 and the inner side of the base 5, a drain port 35 communicating with the outside is provided on the cylinder seat 3, a first drain hole 36 is provided on the cylinder seat 3, and the first cavity 34 and the second cavity 51 are communicated through the first drain hole 36; a water retaining ring 52 is installed on the inner side of the front end of the base 5, the front end of the water retaining ring 52 is installed on the inner side of the rear end of the waterproof joint 62, a waterproof ring 53 is installed on the inner side of the rear end of the waterproof joint 62, and the waterproof ring 53 is located on the inner side of the water retaining ring 52, a waterproof cover 54 is installed on the rear end of the main shaft 6, and a first annular groove 55 and a second annular groove 56 with a front end opening are respectively provided on the waterproof cover 54, the first annular groove 55 is located on the inner side of the second annular groove 56, and the waterproof cover 54 is buckled on the water retaining ring 52 and the waterproof ring 53 The rear end of the waterproof ring 53 extends into the first annular groove 55 to form a waterproof maze, and the rear end of the water retaining ring 52 extends into the second annular groove 56 to form a waterproof maze. The outer wall of the water retaining ring 52 is provided with a third annular groove 57, and the third annular groove 57 is communicated with the first drainage hole 36. A first sealing ring 65 is installed between the front end of the water retaining ring 52 and the rear end of the waterproof joint 62, and a second sealing ring 66 is installed between the waterproof ring 53 and the rear end of the waterproof joint 62. A third sealing ring 67 is installed between the waterproof cover 54 and the rear end of the main shaft 6, and a fourth sealing ring 68 is installed between the main shaft 6 and the broaching rod 61. The outer wall of the waterproof ring 53 is provided with a fourth annular groove 58, and the rear end of the waterproof joint 62 is provided with a third cavity 69 and a second drainage hole 60. The fourth annular groove 58, the third cavity 69 and the second drainage hole 60 are communicated in sequence, and the second drainage hole 60 is communicated with the outside world.

[0021] The knife-beating cylinder with central water outlet function of Example 2 is different from Example 1 in that, in Example 2, an annular air channel 59 and a sealed annular air cavity 50 are provided in the waterproof ring 53, and an air inlet 10 is provided in the waterproof joint 62. The air inlet 10, the annular air cavity 50, the annular air channel 59 and the first annular groove 55 are sequentially connected, and the air inlet 10 is used to deliver compressed air to the annular air cavity 50. On the basis of the waterproof and drainage structure, the air inlet 10, the annular air cavity 50 and the annular air channel 59 constitute an air-sealing structure for forming a positive pressure to further block water vapor from flowing into the water retaining structure, thereby achieving a better waterproof effect and ensuring that water vapor does not enter the interior of the main shaft 6.

[0022] The above-mentioned knife-breaking cylinder's knife-unclamping principle is as follows: when the knife is unclamped, the hydraulic oil from the main shaft hydraulic oil pipeline flows from the front end of the main shaft 6 into the hydraulic oil transmission unit matched with the knife-unclamping oil chamber 11, and enters the knife-unclamping oil chamber 11 through the corresponding first oil hole 15, second oil hole 16, and third oil hole 17, so that the knife-breaking piston 1 moves forward under the action of oil pressure, and the knife-breaking piston 1 drives the collision block 13 to move forward, and the collision block 13 contacts with the induction ring 64, pushing the induction ring 64 and the knife-pulling rod 61 to move toward the front end of the main shaft 6, thereby realizing the knife-unclamping action; similarly, the knife-breaking piston 1 When the impact block 13 moves backward, the impact block 13 separates from the induction ring 64, and the tool pulling rod 61 is reset under the action of the disc spring 611, thereby realizing the tool clamping action; when clamping the tool, the hydraulic oil from the main shaft hydraulic oil pipeline flows from the front end of the main shaft 6 into the hydraulic oil transmission unit matching the tool clamping oil chamber 12, and enters the tool clamping oil chamber 12 through the corresponding first oil hole (not shown in the figure), the second oil hole 16', and the third oil hole 17', so that the tool beating piston 1 retreats and resets, and the impact block 13 and the induction ring 64 are disengaged, and the main shaft 6 realizes the tool clamping action.

[0023] During the process of loosening and clamping the knife, when loosening the knife, the induction ring 64 moves forward to trigger one induction switch 32; when clamping the knife, the induction ring 64 resets backward to trigger another induction switch 32. Through the induction switches 32 at different positions, the different positions of the induction ring 64 are judged, and the loosening and clamping state of the spindle 6 is obtained.

[0024] The central water outlet principle of the above-mentioned tool-beating cylinder is as follows: the cutting fluid from the spindle cutting fluid pipeline enters the rear end of the spindle 6 from the front end of the spindle 6, passes through the first liquid inlet hole, the second liquid inlet hole 42 and the third liquid inlet hole 43, and finally enters the storage cavity 41, and then enters the rotary joint 8 and the center hole 63 of the tool pulling rod 61 from the storage cavity 41, and leads to the front end of the spindle 6, realizing the central water outlet function, that is, the tool internal cooling function.

[0025] The waterproof principle of the knife-beating cylinder is as follows: when liquid leaks from the knife-beating mechanism or the rotary joint 8, it first enters the first cavity 34. The concave-convex waterproof labyrinth structure composed of the water retaining ring 52 and the second annular groove 56 can prevent most of the liquid from entering the interior of the main shaft 6, so that the liquid enters the second cavity 51 through the first drainage hole 36 and is discharged through the drainage port 35. The third annular groove 57 on the outer wall of the water retaining ring 52 plays a role in blocking the liquid from crawling along the outer wall of the water retaining ring 52. Combined with the first sealing ring 65, the liquid can be completely blocked from penetrating into the main shaft 6. The water retaining ring 52 and the corresponding sealing structure constitute the first line of defense for waterproofing the main shaft 6. When some liquid passes through the blocking of the first line of defense, the second line of defense composed of the waterproof ring 53 and the waterproof cover 54 can play a further blocking role. The concave-convex waterproof maze structure composed of the waterproof ring 53 and the first ring groove 55 can prevent the liquid from continuing to enter the main shaft 6. At the same time, the fourth ring groove 58 on the outer wall of the waterproof ring 53 has the function of blocking the liquid from crawling along the outer wall of the waterproof ring 53. Combined with the second sealing ring 66, it can block the liquid from further penetrating into the main shaft 6, so that the liquid is discharged into the third cavity 69 and discharged through the second drainage hole 60. The design of the above waterproof and drainage structure can effectively block the liquid outside the main shaft 6.

[0026] The knife-beating mechanism and the center water outlet mechanism in the knife-beating cylinder are almost completely overlapped in the axial space, which greatly releases the axial space of the spindle and can effectively reduce the axial length of the spindle. Taking the traditional BT50 spindle as an example, the axial length of the traditional BT50 spindle knife-beating cylinder is about 100 cm, plus the length of the traditional center water outlet rotary joint and the corresponding installation pipeline, the overall length will be about 150 cm. After adopting the knife-beating cylinder with a center water outlet function of the present invention, the overall length of the BT50 spindle can be directly controlled to about 100 cm.

Claims

1. A knife-beating cylinder with a central water outlet function, characterized in that: It includes a knife beating mechanism and a central water outlet mechanism, the knife beating mechanism includes a hollow and coaxially arranged knife beating piston, a cylinder body, a cylinder seat, a cylinder pressure cover and a base, the front end of the base is installed on the outer wall of the cylinder body, the rear end of the base is installed on the rear end of the hollow waterproof joint, the waterproof joint is arranged on the outside of the rear end of the main shaft, the cylinder seat is installed on the inner side of the base, the cylinder body is installed on the rear end of the cylinder seat, the knife beating piston is arranged in the inner hole of the cylinder body, the front end of the knife beating piston is opposite to the rear end of the knife pulling rod arranged on the inner side of the main shaft, the cylinder pressure cover is installed on the rear end of the cylinder body, the cylinder pressure cover, the cylinder body and the knife beating piston form a knife loosening oil chamber, the cylinder body and the knife beating piston form a knife clamping oil chamber, the knife loosening oil chamber and the knife clamping oil chamber are divided into The center water outlet mechanism comprises a center water outlet piston, a rotary joint and a center water outlet pressure cover. The center water outlet piston is arranged in the inner hole of the cylinder pressure cover and fixed on the knife-beating piston. A hollow mounting block is installed at the rear end of the center water outlet piston. The rotary joint is installed on the inner side of the mounting block and arranged on the inner side of the center water outlet piston. The center water outlet pressure cover is installed at the rear end of the cylinder pressure cover. The center water outlet pressure cover, the cylinder pressure cover, the center water outlet piston and the rotary joint form a storage cavity. The inlet of the storage cavity is communicated with the spindle cutting fluid pipeline, the outlet of the storage cavity is communicated with the inlet of the rotary joint, the outlet of the rotary joint is communicated with the center hole of the broaching rod, and the front end of the center hole of the broaching rod directly reaches the front end of the spindle.

2. The knife-beating cylinder with central water outlet function according to claim 1, characterized in that: A collision block is installed at the front end of the knife-beating piston through a screw, and a first adjustment block is tightly arranged between the collision block and the knife-beating piston. An induction ring is installed at the rear end of the knife-pulling rod, and the induction ring is opposite to the collision block. Several second adjustment blocks are installed on the front and back of the cylinder seat, and each of the second adjustment blocks is installed with an induction switch, and several of the induction switches are respectively adapted to the induction rings.

3. The knife-beating cylinder with central water outlet function according to claim 1, characterized in that: A cutting fluid transmission unit is arranged between the spindle cutting fluid pipeline and the storage cavity, and the cutting fluid transmission unit includes a first liquid inlet hole, a second liquid inlet hole and a third liquid inlet hole. The first liquid inlet hole, the second liquid inlet hole and the third liquid inlet hole are respectively opened on the cylinder seat, the cylinder body and the cylinder pressure cover. The first liquid inlet hole is communicated with the spindle cutting fluid pipeline, and the first liquid inlet hole, the second liquid inlet hole, the third liquid inlet hole and the entrance of the storage cavity are communicated in sequence.

4. The knife-beating cylinder with central water outlet function according to claim 1, characterized in that: A hydraulic oil transmission unit is respectively arranged between the spindle hydraulic oil pipeline and the tool loosening oil chamber and the tool clamping oil chamber. Each of the hydraulic oil transmission units includes a first oil hole, a second oil hole and a third oil hole. The first oil hole, the second oil hole and the third oil hole are respectively opened on the cylinder seat, the cylinder body and the cylinder cover. The first oil hole is communicated with the spindle hydraulic oil pipeline, and the first oil hole, the second oil hole and the third oil hole are communicated with each other in sequence. The third oil holes of the two hydraulic oil transmission units are respectively communicated with the tool loosening oil chamber and the tool clamping oil chamber.

5. The knife-beating cylinder with central water outlet function according to claim 1, characterized in that: A first cavity is provided on the inner side of the cylinder seat, a second cavity is provided between the outer side of the cylinder seat and the inner side of the base, a drainage port communicating with the outside is provided on the cylinder seat, a first drainage hole is provided on the cylinder seat, and the first cavity and the second cavity are communicated with each other through the first drainage hole; a water retaining ring is installed on the inner side of the front end of the base, the front end of the water retaining ring is installed on the inner side of the rear end of the waterproof joint, a waterproof ring is installed on the inner side of the rear end of the waterproof joint, the waterproof ring is located on the inner side of the water retaining ring, a waterproof cover is installed on the rear end of the main shaft, a first ring groove and a second ring groove with a front end opening are respectively provided on the waterproof cover, the first ring groove is located on the inner side of the second ring groove, and the waterproof cover is buckled between the water retaining ring and the waterproof On the ring, the rear end of the waterproof ring extends into the first ring groove to form a waterproof maze, the rear end of the water retaining ring extends into the second ring groove to form a waterproof maze, the outer wall of the water retaining ring is provided with a third ring groove, and the third ring groove is communicated with the first drainage hole, a first sealing ring is installed between the front end of the water retaining ring and the rear end of the waterproof joint, a second sealing ring is installed between the waterproof ring and the rear end of the waterproof joint, a third sealing ring is installed between the waterproof cover and the rear end of the main shaft, a fourth sealing ring is installed between the main shaft and the broaching rod, the outer wall of the waterproof ring is provided with a fourth ring groove, the rear end of the waterproof joint is provided with a third cavity and a second drainage hole, the fourth ring groove, the third cavity and the second drainage hole are communicated in sequence, and the second drainage hole is communicated with the outside world.

6. The knife-beating cylinder with central water outlet function according to claim 5, characterized in that: The waterproof ring is provided with an annular air channel and a sealed annular air cavity, the waterproof joint is provided with an air inlet hole, the air inlet hole, the annular air cavity, the annular air channel and the first annular groove are connected in sequence, and the air inlet hole is used to transport compressed air to the annular air cavity.

7. The knife-beating cylinder with central water outlet function according to claim 1, characterized in that: A third adjustment block is tightly arranged between the axial direction of the central water outlet piston and the mounting block.

Images