Stroke-adjustable rotary cylinder

Abstract

The stroke-adjustable rotary cylinder is characterized in that a cylinder body is connected with a flange shaft to form a movable cavity, and an inner cavity is formed in the flange shaft in the axis direction of the flange shaft in a penetrating mode; the piston is connected into the movable cavity in a sliding manner and is provided with a pull rod connecting part and a limiting part penetrating into the inner cavity in the axis direction; the outer side of the flange shaft is sequentially sleeved with a rotary sleeve and a water ring in the axis direction of the flange shaft, and an adjusting bolt matched with the limiting part of the piston is arranged at the other end of the inner cavity of the flange shaft in a penetrating mode; the cylinder body and the flange shaft are provided with upper oil channels which are communicated with each other, and the upper oil channels are communicated to one side, close to the cylinder body, of the movable cavity; the cylinder body and the flange shaft are further provided with lower oil ducts which are communicated with each other, and the lower oil ducts are communicated to the side, close to the flange shaft, of the movable cavity; a first hydraulic port communicated with the upper oil duct and a second hydraulic port communicated with the lower oil duct are respectively formed in the rotary sleeve; a water injection channel penetrates through the piston in the axis direction and communicates with an inner cavity of the flange shaft, and a water injection hole communicating with the inner cavity of the flange shaft is formed in the water ring.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pistons, in particular to a stroke-adjustable rotary cylinder. Background Art

[0002] A hydraulic rotary cylinder is a power source used in conjunction with a wedge-type power chuck or other power clamp. Installed at the rear end of the machine tool's spindle and rotating with it, it generates reciprocating push-pull forces to drive the chuck or clamp to tighten or loosen the workpiece. The cylinder body of the hydraulic rotary cylinder also includes a swivel seat rotatably connected to the end extending away from the piston. The oil inlet of the hydraulic rotary cylinder is located on the swivel seat, which is equipped with a corresponding channel connected to the oil circuit. As the spindle rotates, the swivel seat remains stationary, allowing a steady supply of oil to the oil circuit through the channel.

[0003] When installing center-injection pistons to drive chucks, collets, and other locking workpieces on existing CNC machine tools, the rotary cylinder is a solid-center rotation and does not have the ability to adjust the stroke. When it is necessary to control the range of motion of the chuck or collet, this can generally only be achieved by configuring and replacing pull rods of different lengths to adjust the piston stroke. This cannot be adjusted in real time according to the needs of the production site, and the machine tool needs to be shut down for replacement, affecting the machine tool debugging efficiency.

[0004] Therefore, the utility model proposes a stroke-adjustable rotary cylinder. Utility Model Content

[0005] In view of the deficiencies of the prior art, the present invention proposes a stroke-adjustable rotary cylinder, which does not require the configuration and replacement of pull rods of different lengths to adjust the piston stroke, and is convenient for adjusting the piston stroke.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A stroke-adjustable rotary cylinder comprises a cylinder body, a piston, a flange shaft, a rotary sleeve and a water ring. The cylinder body is connected to the flange shaft to form a movable chamber. An inner chamber is provided in the flange shaft along its axial direction. The piston is slidably connected in the movable chamber and is provided with a pull rod connecting portion extending out of the cylinder body and a limit portion extending into the inner chamber of the flange shaft along its axial direction. The outer side of the flange shaft is sequentially sleeved with a rotary sleeve and a water ring along its axial direction, and an adjusting bolt is provided at the other end of the inner chamber of the flange shaft to cooperate with the limit portion of the piston.

[0008] The cylinder body and the flange shaft are provided with an upper oil passage that is in communication with each other, and the upper oil passage is connected to the side of the active chamber close to the cylinder body; the cylinder body and the flange shaft are also provided with a lower oil passage that is in communication with each other, and the lower oil passage is connected to the side of the active chamber close to the flange shaft; the rotary sleeve is provided with a first hydraulic port that is in communication with the upper oil passage and a second hydraulic port that is in communication with the lower oil passage.

[0009] The piston is provided with a water injection channel along the axial direction and is communicated with the inner cavity of the flange shaft. The water ring is provided with a water injection hole communicated with the inner cavity of the flange shaft.

[0010] Preferably, the upper oil channel includes a first sub-oil channel and a second sub-oil channel, the first sub-oil channel is arranged in the flange shaft and one end of the first sub-oil channel is connected to one end of the second sub-oil channel, and the other end is connected to the first hydraulic port of the rotating sleeve; the second sub-oil channel is arranged in the cylinder body and the other end is connected to the side of the active chamber close to the flange shaft.

[0011] Preferably, the lower oil passage includes a third sub-oil passage, which is provided in the flange shaft and has one end connected to a side of the movable chamber close to the flange shaft and the other end connected to the second hydraulic port.

[0012] Preferably, a guide groove is provided in the flange shaft, one end of the guide groove is communicated with the water injection hole, and the other end is communicated with the inner cavity of the flange shaft.

[0013] Preferably, a first annular groove is provided in the water ring, and the water injection hole is communicated with the first annular groove and is communicated with the guide groove through the first annular groove.

[0014] Preferably, there is a gap between the water ring and the flange shaft, a drain hole is provided through the water ring and a second ring groove is provided on the water ring, the drain hole is communicated with the second ring groove and is communicated with the gap through the second ring groove.

[0015] Preferably, deep groove ball bearings and skeleton oil seals are provided on both side ends of the rotary sleeve from inside to outside.

[0016] Preferably, there is a gap between the rotating sleeve and the flange shaft, and the rotating sleeve is provided with an oil discharge port communicating with the gap.

[0017] Preferably, the rotating sleeve is connected to the water ring bolts.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The cam is secured to the piston rod and is secured to a position 400 meters high and within a range of rotations and is designed to engage a plurality of piston rods, each of which is secured to a plurality of piston rods and is engageable with the piston rods of the piston rod in a plurality of piston rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic diagram of the external structure of a stroke-adjustable rotary cylinder of the utility model;

[0022] Figure 2 This is a side view of a stroke-adjustable rotary cylinder of the utility model;

[0023] Figure 3 for Figure 2 Sectional view along line AA;

[0024] Figure 4 for Figure 2 Cross-sectional view along line BB;

[0025] Figure identification: 1-cylinder body; 11-active chamber; 12-second sub-oil channel; 2-piston; 21-pull rod connecting part; 22-limiting part; 23-water injection channel; 3-flange shaft; 31-inner cavity; 32-first sub-oil channel; 33-third sub-oil channel; 34-guide groove; 4-swivel sleeve; 41-first hydraulic port; 42-second hydraulic port; 43-deep groove ball bearing; 44-skeleton oil seal; 45-oil unloading port; 5-water ring; 51-water injection hole; 52-drain hole; 53-first ring groove; 54-second ring groove; 6-adjusting bolt. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] This embodiment proposes a stroke-adjustable rotary cylinder, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, it includes a cylinder body 1, a piston 2, a flange shaft 3, a rotary sleeve 4 and a water ring 5. The cylinder body 1 is connected to the flange shaft 3 to form an active chamber 11. An inner chamber 31 is provided in the flange shaft 3 along its axial direction. The piston 2 is slidably connected to the active chamber 11 and is provided with a pull rod connecting portion 21 passing through the cylinder body 1 and a limit portion 22 passing through the inner chamber 31 of the flange shaft 3 along its axial direction. The outer side of the flange shaft 3 is sequentially sleeved with the rotary sleeve 4 and the water ring 5 along its axial direction, and the other end of the inner chamber 31 of the flange shaft 3 is penetrated by an adjusting bolt 6 that cooperates with the limit portion 22 of the piston 2.

[0030] The cylinder body 1 and the flange shaft 3 are provided with an upper oil passage that is in communication with each other, and the upper oil passage is connected to the side of the active chamber 11 close to the cylinder body 1; the cylinder body 1 and the flange shaft 3 are also provided with a lower oil passage that is in communication with each other, and the lower oil passage is connected to the side of the active chamber 11 close to the flange shaft 3; the rotary sleeve 4 is provided with a first hydraulic port 41 that is in communication with the upper oil passage, and a second hydraulic port 42 that is in communication with the lower oil passage.

[0031] The piston is provided with a water injection channel along the axial direction and communicated with the inner cavity 31 of the flange shaft 3 . The water ring 5 is provided with water injection holes 51 communicated with the inner cavity 31 of the flange shaft 3 .

[0032] In this embodiment, if Figure 4 As shown, when the flange shaft 3 is connected to the cylinder body 1, an upper oil channel is formed, and the upper oil channel includes a first sub-oil channel 32 and a second sub-oil channel 12. The first sub-oil channel 32 is arranged in the flange shaft 3 and one end thereof is connected to one end of the second sub-oil channel 12, and the other end is connected to the first hydraulic port 41 of the rotary sleeve 4; the second sub-oil channel 12 is arranged in the cylinder body 1 and the other end thereof is connected to the side of the active chamber 11 close to the flange shaft 3.

[0033] In this embodiment, the lower oil passage includes a third sub-oil passage 33 , which is disposed in the flange shaft 3 and has one end connected to the side of the movable chamber 11 close to the flange shaft 3 and the other end connected to the second hydraulic port 42 .

[0034] In this embodiment, a guide groove 34 is defined in the flange shaft 3 . One end of the guide groove 34 is communicated with the water injection hole 51 , and the other end is communicated with the inner cavity 31 of the flange shaft 3 .

[0035] In this embodiment, a first annular groove 53 is provided in the water ring 5, and the water injection hole 51 is connected to the first annular groove 53 and is connected to the guide groove 34 through the first annular groove 53. When the workpiece is processed, the iron chips are discharged in time through the coolant to avoid workpiece defects caused by scratches on the inner hole of the workpiece, blockage of iron chips, etc.

[0036] In this embodiment, there is a gap between the water ring 5 and the flange shaft. A drainage hole 52 is provided on the water ring 5 and a second annular groove 54 is provided on the water ring 5. The drainage hole 52 is connected to the second annular groove 54 and is connected to the gap through the second annular groove 54 to discharge excess water in the gap.

[0037] In this embodiment, deep groove ball bearings 43 and skeleton oil seals 44 are sequentially provided on both side ends of the rotary sleeve 4 from the inside to the outside to seal and support the rotary sleeve.

[0038] In this embodiment, there is a gap between the rotating sleeve 4 and the flange shaft 3. The rotating sleeve 4 is provided with an oil discharge port 45 connected to the gap. When part of the hydraulic oil passes through the gap, it enters the position of the deep groove ball bearing 43 and the skeleton oil seal 44 to provide lubrication for the bearing and the skeleton oil seal, and then is recovered into the hydraulic oil tank through the oil discharge port 45.

[0039] In this embodiment, the rotary sleeve 4 is connected to the water ring 5 by bolts.

[0040] In this embodiment, a guide post is provided in the cylinder body, and the guide post is slidably connected to the piston to make the piston more stable during displacement.

[0041] Working principle: The cylinder body 1 is connected to the flange shaft 3 to form an active chamber 11, and an inner chamber 31 is provided in the flange shaft 3 along its axial direction; the piston 2 is slidably connected to the active chamber 11 and is provided with a pull rod connection portion 21 passing through the cylinder body 1 and a limit portion 22 passing through the inner chamber 31 of the flange shaft 3 along its axial direction; the outer side of the flange shaft 3 is sequentially sleeved with a rotary sleeve 4 and a water ring 5 along its axial direction, and the other end of the inner chamber 31 of the flange shaft 3 is penetrated by an adjusting bolt 6 that cooperates with the limit portion 22 of the piston 2. The upper oil channel and the lower oil channel are used for the rotational movement of the piston 2. The first hydraulic port 41 and the second hydraulic port 42 can serve as the hydraulic oil inlet and outlet for each other. In addition, the circulation of cooling water is achieved through the arrangement of the water ring 5, the inner cavity 31 of the flange shaft 3 and the water injection channel 23 of the piston 2. That is, the movement stroke of the piston 2 is limited by the adjusting bolt 6 passed through the inner cavity 31, so as to achieve the effect of adjusting the stroke of the piston 2 without configuring and replacing pull rods of different lengths, thereby improving convenience. At the same time, unlike the solid rotation, it is more functional.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stroke-adjustable rotary cylinder, characterized in that: The invention comprises a cylinder body (1), a piston (2), a flange shaft (3), a rotary sleeve (4) and a water ring (5), wherein the cylinder body (1) is connected to the flange shaft (3) to form a movable chamber (11), and an inner chamber (31) is provided in the flange shaft (3) along its axial direction; the piston (2) is slidably connected in the movable chamber (11) and is provided with a pull rod connecting portion (21) passing through the cylinder body (1) and a limiting portion (22) passing through the inner chamber (31) of the flange shaft (3) along its axial direction; the outer side of the flange shaft (3) is sequentially sleeved with a rotary sleeve (4) and a water ring (5) along its axial direction, and the other end of the inner chamber (31) of the flange shaft (3) is passed through with an adjusting bolt (6) that matches the limiting portion (22) of the piston (2); The cylinder body (1) and the flange shaft (3) are provided with an upper oil passage that is in communication with each other, and the upper oil passage is in communication with the side of the movable chamber (11) close to the cylinder body (1); the cylinder body (1) and the flange shaft (3) are also provided with a lower oil passage that is in communication with each other, and the lower oil passage is in communication with the side of the movable chamber (11) close to the flange shaft (3); the rotary sleeve (4) is provided with a first hydraulic port (41) in communication with the upper oil passage and a second hydraulic port (42) in communication with the lower oil passage. The piston is provided with a water injection channel along the axial direction and is in communication with the inner cavity (31) of the flange shaft (3); and the water ring (5) is provided with water injection holes (51) in communication with the inner cavity (31) of the flange shaft (3).

2. The stroke-adjustable rotary cylinder according to claim 1, characterized in that: The upper oil passage comprises a first sub-oil passage (32) and a second sub-oil passage (12). The first sub-oil passage (32) is arranged in the flange shaft (3) and one end of the first sub-oil passage (32) is communicated with one end of the second sub-oil passage (12), and the other end is communicated with the first hydraulic port (41) of the rotary sleeve (4); the second sub-oil passage (12) is arranged in the cylinder body (1) and the other end of the second sub-oil passage (12) is communicated with the side of the movable chamber (11) close to the flange shaft (3).

3. The stroke-adjustable rotary cylinder according to claim 2, characterized in that: The lower oil passage includes a third sub-oil passage (33), which is arranged in the flange shaft (3) and has one end in communication with a side of the movable chamber (11) close to the flange shaft (3), and the other end in communication with the second hydraulic port (42).

4. The stroke-adjustable rotary cylinder according to claim 1, characterized in that: A guide groove (34) is provided in the flange shaft (3), one end of the guide groove (34) is communicated with the water injection hole (51), and the other end is communicated with the inner cavity (31) of the flange shaft (3).

5. The stroke-adjustable rotary cylinder according to claim 4, characterized in that: A first annular groove (53) is provided in the water ring (5); the water injection hole (51) is in communication with the first annular groove (53) and is in communication with the guide groove (34) through the first annular groove (53).

6. The stroke-adjustable rotary cylinder according to claim 5, characterized in that: There is a gap between the water ring (5) and the flange shaft, a drain hole (52) is provided through the water ring (5), and a second annular groove (54) is provided on the water ring (5), and the drain hole (52) is communicated with the second annular groove (54) and is communicated with the gap through the second annular groove (54).

7. The stroke-adjustable rotary cylinder according to claim 1, characterized in that: The ends of both sides of the rotary sleeve (4) are provided with deep groove ball bearings (43) and skeleton oil seals (44) in sequence from the inside to the outside.

8. The stroke-adjustable rotary cylinder according to claim 7, characterized in that: There is a gap between the rotary sleeve (4) and the flange shaft (3), and an oil discharge port (45) communicating with the gap is provided through the rotary sleeve (4).

9. The stroke-adjustable rotary cylinder according to claim 7, characterized in that: The rotary sleeve (4) is connected to the water ring (5) by bolts.

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