A front cylinder spindle

Abstract

The utility model provides a kind of front cylinder main shaft, belong to mechanical technical field.It has solved the problem of inconvenient use of existing main shaft.The front cylinder main shaft of the utility model includes base and the main shaft of horizontal rotation setting in base, main shaft front end fixed connection cylinder, cylinder includes the cylinder body of being in the shape of barrel and the piston of setting in cylinder body, cylinder body front end is equipped with chuck, and chuck front end is cooperated with cylinder body by taper surface, chuck rear end fixed connection piston, piston is hollow, and piston rear end is fixed with the fixed sleeve coaxial with the piston in, fixed sleeve is screw-threaded with fixed length rod, and fixed length rod front end extends fixed sleeve and is in chuck.The front cylinder main shaft of the utility model is convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a spindle, particularly a front-mounted cylinder spindle. Background Technology

[0002] A front-mounted cylinder spindle is a device in a fixture used to ensure that the workpiece remains in a fixed position during machining. Its main purpose is to prevent unnecessary movement of the workpiece during machining, thereby ensuring machining accuracy and efficiency.

[0003] The existing front-mounted cylinder spindle, such as the workpiece clamping device previously proposed by the applicant (application number: 202410668477.0), includes a base and a spindle horizontally rotatably mounted on the base. The spindle is hollow, with a chuck horizontally positioned inside the front end. A motor for driving the spindle's rotation is located at the rear end. A front cover and a rear cover, both annular in shape, are sealed and fixed inside the spindle, and the front cover, rear cover, and spindle are coaxially arranged. A piston is positioned between the front cover and the rear cover, with both ends of the piston slidably mounted inside the front and rear covers, and the front end of the piston is fixedly connected to the aforementioned chuck. The piston forms a seal with the inner walls of the front cover and the rear cover respectively, and a seal is formed between the middle of the piston and the inner wall of the main shaft. The front cover, piston, main shaft and rear cover form a closed annular front cavity and an annular rear cavity, which are respectively arranged on the front and rear sides of the middle of the piston. A connecting sleeve is rotatably fitted on the outside of the main shaft. The connecting sleeve and the main shaft form a first air passage that connects the annular front cavity to the outside. By sending air into the annular front cavity through the first air passage, the piston can always maintain the tendency to move backward. The main shaft also includes a drive structure for driving the piston to move forward.

[0004] When using the above device, the workpiece is horizontally inserted into the chuck, and the piston drives the chuck to move backward to tighten and hold the workpiece. The depth of the workpiece inserted into the chuck is entirely determined by manual judgment, which not only affects the accuracy, but also may require multiple adjustments to the workpiece position, making it inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a convenient front-mounted cylinder spindle.

[0006] The purpose of this utility model can be achieved through the following technical solution: a front-mounted cylinder spindle, including a base and a spindle horizontally rotatably disposed in the base, a cylinder fixedly connected to the front end of the spindle, the cylinder including a cylindrical cylinder body and a piston disposed in the cylinder body, a chuck provided in the front end of the cylinder body, the front end of the chuck and the cylinder body being engaged by a conical surface, the rear end of the chuck being fixedly connected to the piston, characterized in that the piston is hollow, a fixed sleeve coaxial with the piston is fixed in the rear end of the piston, a fixed length rod is threadedly connected in the fixed sleeve, and the front end of the fixed length rod extends out of the fixed sleeve and is located in the chuck.

[0007] In use, the workpiece is inserted into the chuck and pressed against the front end of the fixed-length rod. Then, the cylinder moves the piston backward, which in turn moves the chuck backward. The conical surface helps the front end of the chuck to contract and hold the workpiece tightly. Finally, the spindle rotates and the cylinder drives the workpiece to rotate for grinding and other processing.

[0008] A fixed-length rod is installed inside the piston, with its front end inside the chuck. This limits the length of the workpiece that extends into the chuck, allowing the workpiece to be loaded into place in one go. This not only makes it convenient to use but also improves clamping efficiency, thereby increasing processing efficiency.

[0009] Meanwhile, the fixed length rod and the fixed sleeve are connected by threads, which makes it easy to adjust the length of the fixed length rod extending into the chuck to adapt to workpieces of different lengths, making it highly practical.

[0010] In the aforementioned front-mounted cylinder spindle, the rear end of the aforementioned chuck is inserted into the piston and the two are connected by threads. The rear end of the chuck presses against the fixed sleeve so that the chuck is screwed into place in one go, which facilitates the installation and removal of the chuck.

[0011] In the aforementioned front-mounted cylinder spindle, the fixed sleeve extends forward to form a positioning tube, which is sleeved outside the length-fixing rod. An annular groove is formed between the outer wall of the positioning tube and the inner wall of the piston, and the annular groove and the piston are coaxially arranged. The width of the annular groove matches the thickness of the rear end of the chuck, and the rear end of the chuck is inserted into the annular groove; the front end of the length-fixing rod extends out of the positioning tube. The rear end of the chuck is contained within the matching annular groove to improve the strength and stability of the chuck's positioning, making it more stable in clamping the workpiece.

[0012] In the aforementioned front-mounted cylinder spindle, the fixing sleeve includes an internal thread that mates with the threaded length rod. The internal thread extends to the inner wall of the positioning tube, and a threaded engagement is also formed between the positioning tube and the length rod. This design effectively extends the thread engagement length and improves the positioning strength and stability of the length rod.

[0013] In the aforementioned front-mounted cylinder spindle, a polygonal hole is provided on the front end face of the length-fixing rod, and the polygonal hole is coaxially arranged with the length-fixing rod. In actual use, the tool cooperates with the polygonal hole to rotate the length-fixing rod, so as to facilitate the adjustment of the extension length of the length-fixing rod to adapt to workpieces of different sizes.

[0014] In the aforementioned front-mounted cylinder spindle, an interference fit is formed between the outer wall of the fixed sleeve and the inner wall of the piston.

[0015] Compared with existing technologies, this front-mounted cylinder spindle has the following advantages: 1. A fixed-length rod is installed inside the piston, with the front end of the fixed-length rod inside the chuck. This is used to limit the length of the workpiece extending into the chuck, so that the workpiece can be loaded into place in one go. This is convenient to use and can improve clamping efficiency, thereby improving processing efficiency.

[0016] 2. The fixed length rod and the fixed sleeve are connected by threads, which makes it easy to adjust the length of the fixed length rod extending into the chuck to adapt to workpieces of different lengths, and has good practicality.

[0017] 3. The rear end of the chuck is contained in a matching annular groove to improve the strength and stability of the chuck's positioning, making it more stable in clamping the workpiece. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the front-mounted cylinder spindle.

[0019] Figure 2 This is a cross-sectional schematic diagram of the front-mounted cylinder spindle.

[0020] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0021] In the diagram, 1 is the machine base; 2 is the spindle; 3 is the motor; 4 is the coupling; 5 is the cylinder; 5a is the cylinder body; 5b is the piston; 5c is the front chamber; 5d is the rear chamber; 6 is the sealing ring; 7 is the connecting sleeve; 8 is the air nozzle; 9 is the chuck; 10 is the fixing sleeve; 10a is the positioning tube; 11 is the length rod; and 11a is the polygonal hole. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 and Figure 2 As shown, the main shaft of this front-mounted cylinder includes a base 1 and a main shaft 2. The base 1 has a cylindrical structure with open ends. The main shaft 2 is horizontally rotatable within the base 1, and the main shaft 2 and the base 1 are coaxial. In the actual product, both ends of the main shaft 2 are rotatably engaged with the base 1 using bearings.

[0024] Specifically The spindle 2 is hollow, and the outer wall of the front end of the spindle 2 is sealed to the inner wall of the base 1 by an oil seal. A motor 3 is fixed to the rear end of the base 1, and preferably, the motor 3 is a servo motor. The rotor shaft of the motor 3 extends into the base 1, and the rotor shaft is connected to the front end of the spindle 2 by a coupling 4 to drive the spindle 2 to rotate circumferentially.

[0025] like Figure 2 and Figure 3As shown, a cylinder 5 is fixedly connected to the front end of the main shaft 2. The cylinder 5 includes a cylinder body 5a and a piston 5b disposed within the cylinder body 5a, and the cylinder body 5a, piston 5b, and main shaft 2 are coaxially arranged. The cylinder body 5a is cylindrical in shape, with both its front and rear ends open. The piston 5b is hollow, with both its front and rear ends open. The middle part of the piston 5b is a straight tube, and both its front and rear ends are sealed to the inner wall of the cylinder body 5a by sealing rings 6. This creates an air chamber between the straight tube and the cylinder body 5a, which is divided into a front chamber 5c and a rear chamber 5d by the piston 5b. In the actual product, a connecting sleeve 7 is also fitted over the front end of the cylinder body 5a. Both ends of the connecting sleeve 7 are rotatably mounted at the front end of the cylinder body 5a via bearings, and the connecting sleeve 7 is in a fixed state during actual use. A first air passage and a second air passage are provided between the connecting sleeve 7 and the cylinder body 5a. The inlet and outlet of the first air passage are respectively located on the outer wall of the connecting sleeve 7 and the wall of the front cavity 5c, and the inlet and outlet of the second air passage are respectively located on the outer wall of the connecting sleeve 7 and the wall of the rear cavity 5d. The inlets of both the first and second air passages are connected to the air nozzle 8. The specific structures of the first and second air passages are existing, and can be found in the workpiece clamping device previously proposed by the applicant (application number: 202410668477.0), which will not be elaborated here.

[0026] like Figure 2 As shown, a chuck 9 is provided inside the front end of the cylinder body 5a. The chuck 9 is hollow and coaxially arranged with the main shaft 2. Preferably, the type of chuck 9 is an ER chuck 9. The front end of the chuck 9 is engaged with the cylinder body 5a through a conical surface. Specifically, the outer wall of the front end of the chuck 9 is a conical surface one, and the diameter of the conical surface one gradually decreases from front to back. A conical surface two matching the conical surface one is formed on the inner wall of the front end of the cylinder body 5a. The rear end of the chuck 9 is fixedly connected to the piston 5b. A fixing sleeve 10 coaxial with the piston 5b is fixed inside the rear end of the piston 5b. A fixed length rod 11 is threadedly connected to the fixing sleeve 10, and the front end of the fixed length rod 11 extends out of the fixing sleeve 10 and is located inside the chuck 9.

[0027] In use, the workpiece is inserted into the chuck 9 and pressed against the front end of the fixed-length rod 11. Then, the cylinder 5 moves to move the piston 5b backward, which in turn moves the chuck 9 backward. The conical surface helps the front end of the chuck 9 to contract and hold the workpiece tightly. Finally, the spindle 2 rotates and drives the workpiece to rotate through the cylinder 5 for grinding and other processing.

[0028] A fixed-length rod 11 is provided inside the piston 5b, and the front end of the fixed-length rod 11 is inside the chuck 9. This is used to limit the length of the workpiece extending into the chuck 9, so that the workpiece can be loaded into place at one time. This is convenient to use and can improve clamping efficiency, thereby improving processing efficiency.

[0029] Meanwhile, the fixed length rod 11 is connected to the fixed sleeve 10 by a thread, which makes it easy to adjust the length of the fixed length rod 11 extending into the chuck 9 to adapt to workpieces of different lengths, thus making it more practical.

[0030] In this embodiment, like Figure 2 and Figure 3 As shown, the connection between the chuck 9 and the piston 5b is as follows: the rear end of the chuck 9 is inserted into the piston 5b, and the two are connected by threads. The rear end of the chuck 9 presses against the fixed sleeve 10, so that the chuck 9 is screwed into place in one go, facilitating the assembly and disassembly of the chuck 9. Further, the fixed sleeve 10 extends forward to form a positioning tube 10a, and the positioning tube 10a and the fixed sleeve 10 are coaxially arranged. The positioning tube 10a is sleeved over the length-fixing rod 11. An annular groove is formed between the outer wall of the positioning tube 10a and the inner wall of the piston 5b, and the annular groove and the piston 5b are coaxially arranged. The width of the annular groove matches the thickness of the rear end of the chuck 9, and the rear end of the chuck 9 is inserted into the annular groove; the front end of the length-fixing rod 11 extends out of the positioning tube 10a. The rear end of the chuck 9 is contained within the matching annular groove to improve the strength and stability of the chuck 9 in positioning, making it more stable in clamping the workpiece.

[0031] Furthermore, the fixing sleeve 10 includes an internal thread that mates with the threaded length rod 11. The internal thread extends to the inner wall of the positioning tube 10a, and a threaded engagement is also formed between the positioning tube 10a and the length rod 11. This design effectively extends the thread engagement length, improving the positioning strength and stability of the length rod 11. In actual products, a polygonal hole 11a is provided on the front end face of the length rod 11, and the polygonal hole 11a is coaxially arranged with the length rod 11. In actual use, a tool engages with the polygonal hole 11a to rotate the length rod 11, facilitating the adjustment of the extension length of the length rod 11 to accommodate workpieces of different sizes.

[0032] The connection between the fixed sleeve 10 and the piston 5b is as follows: an interference fit is formed between the outer wall of the fixed sleeve 10 and the inner wall of the piston 5b. Of course, the fixed sleeve 10 can also be fixed to the piston 5b by welding.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A front-mounted cylinder spindle, comprising a base (1) and a spindle (2) horizontally rotatably disposed within the base (1), wherein a cylinder (5) is fixedly connected to the front end of the spindle (2), the cylinder (5) comprising a cylindrical cylinder body (5a) and a piston (5b) disposed within the cylinder body (5a), a chuck (9) is provided at the front end of the cylinder body (5a), the front end of the chuck (9) and the cylinder body (5a) are engaged by a conical surface, and the rear end of the chuck (9) is fixedly connected to the piston (5b), characterized in that, The piston (5b) is hollow. A fixed sleeve (10) coaxial with the piston (5b) is fixed inside the rear end of the piston (5b). A fixed length rod (11) is threaded inside the fixed sleeve (10), and the front end of the fixed length rod (11) extends out of the fixed sleeve (10) and is inside the chuck (9).

2. The front-mounted cylinder spindle according to claim 1, characterized in that, The rear end of the aforementioned chuck (9) is inserted into the piston (5b) and the two are connected by threads. The rear end of the chuck (9) presses against the fixed sleeve (10).

3. The front-mounted cylinder spindle according to claim 2, characterized in that, The fixed sleeve (10) extends forward to form a positioning tube (10a), and the positioning tube (10a) is sleeved on the outside of the fixed length rod (11). An annular groove is formed between the outer wall of the positioning tube (10a) and the inner wall of the piston (5b), and the annular groove and the piston (5b) are coaxially arranged. The width of the annular groove matches the thickness of the rear end of the chuck (9), and the rear end of the chuck (9) is inserted into the annular groove. The front end of the fixed length rod (11) extends out of the positioning tube (10a).

4. The front-mounted cylinder spindle according to claim 3, characterized in that, The fixing sleeve (10) includes an internal thread that engages with the threaded rod (11), the internal thread extending to the inner wall of the positioning tube (10a), and a threaded engagement is also formed between the positioning tube (10a) and the threaded rod (11).

5. The front-mounted cylinder spindle according to claim 1, characterized in that, A polygonal hole (11a) is provided on the front end face of the fixed length rod (11), and the polygonal hole (11a) is coaxially arranged with the fixed length rod (11).

6. The front-mounted cylinder spindle according to claim 1, characterized in that, An interference fit is formed between the outer wall of the fixed sleeve (10) and the inner wall of the piston (5b).

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