Hydraulic automatic unclamping spindle head

Abstract

According to the scheme, the hydraulic automatic unclamping spindle head comprises a shell, an installation cavity is formed in the shell, and a motor installation position is arranged outside the shell; the hollow main shaft is mounted in the mounting cavity, a taper hole is formed in the front end of the hollow main shaft and communicated with the internal hollow structure, and the rear end is connected with a motor; the broach rod is of a hollow structure and is installed in the hollow main shaft, the front end of the broach rod is connected with a broach claw located in the hollow main shaft, the rear end of the broach rod stretches out of the hollow main shaft, stretches into the hollow oil pressure broach cylinder and is connected with a rotating joint, and the rotating joint is used for being connected with a water source; the belleville spring is positioned between the hollow main shaft and the broach rod; and the hollow oil pressure unclamping cylinder is arranged at the tail end of the shell. The center water outlet function can be achieved during automatic tool unclamping, an existing structure when the broach rod and the tool unclamping block are separated is omitted, an integrated structure is formed, the structural strength is higher, and the abrasion resistance is better.

Description

Technical Field

[0001] The present application relates to the technical field of numerically controlled machine tools, and in particular to a hydraulic automatic tool-cutting spindle head. Background Art

[0002] The electric spindle is a new technology that has appeared in the field of CNC machine tools in recent years. It integrates the machine tool spindle and the spindle motor. It is equipped with a broaching mechanism inside. The end of the electric spindle cooperates with various tools to realize various processing procedures such as cutting, cutting, and drilling on parts. When beating the knife, the push rod of the beating device (with a beating block installed) gives the pull rod assembly (broach rod) an instant impact force. The reaction force of this instant impact force causes the broaching device to move backward together with the floating claw. The push rod further pushes the pull rod assembly to loosen the broach claw until the tool handle is removed. In this process, since the broaching rod and the beating block are not an integrated structure, the strength requirements of the rear end of the broaching rod are high, the overall cost is increased, and it is impossible to install a pipeline structure to realize water outlet from the center of the broaching rod. It can only be started from other places, which further increases the overall cost.

[0003] Therefore, a hydraulic automatic tool-beating spindle head is urgently needed to solve the problems existing in the prior art. Utility Model Content

[0004] The purpose of this application is to provide a hydraulic automatic tooling spindle head to address the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above application purpose, the present application adopts the following technical solution: A hydraulic automatic cutting spindle head includes:

[0006] The housing has a mounting cavity inside and a motor mounting position outside, and is connected to the hollow spindle through the motor drive;

[0007] A hollow main shaft is installed in the installation cavity, and a conical hole is provided at the front end of the hollow main shaft and communicates with the internal hollow structure, and a motor is connected at the rear end;

[0008] The broaching rod has a hollow structure and is installed in the hollow main shaft. The front end is connected to a broaching claw located inside the hollow main shaft, and the rear end extends out of the hollow main shaft and into the hollow hydraulic broaching cylinder and is connected to a rotary joint extending out of the hollow hydraulic broaching cylinder. The rotary joint is used to connect to a water source.

[0009] The butterfly spring is located between the hollow spindle and the broaching rod;

[0010] The hollow hydraulic cutting cylinder is installed at the rear end of the housing.

[0011] Working principle and beneficial effects: Compared with the prior art, the present application combines the traditional broaching rod and the knife-beating block into an integrated broaching rod, which can significantly enhance the strength of the rear end of the broaching rod and achieve higher strength under the same processing cost. Therefore, the processing cost is lower under the same strength. At the same time, the hollow broaching rod is connected to a swivel joint, and the swivel joint is connected to a water source, so the center water outlet automatic knife-beating function can be realized, without the need to install pipelines in other places, further reducing costs.

[0012] Furthermore, the broaching rod is quenched, and the surface hardness is greater than 55HRC, which can further increase the strength of the broaching rod and improve the wear resistance.

[0013] Furthermore, washers are provided at both ends of the butterfly spring, the washers are located between the butterfly spring and the step of the broaching rod and between the butterfly spring and the inner step of the hollow spindle, and a sealing ring is also provided on the washer at the front end of the butterfly spring. In this way, the sealing performance of the hollow spindle behind the front end of the butterfly spring can be enhanced, water can be prevented from flowing back into the butterfly spring, and the spindle can be effectively protected.

[0014] Furthermore, a plurality of bearings are provided between the housing and the hollow main shaft, so that the hollow main shaft can rotate smoothly in the housing.

[0015] Furthermore, the bearing is an angular contact ball bearing. This bearing design allows it to bear loads in two directions at the same time, namely radial (perpendicular to the axis) and axial (parallel to the axis) loads. The load-bearing capacity is related to the contact angle. The larger the contact angle, the stronger the axial load-bearing capacity. And due to its sophisticated design and small internal friction, the angular contact ball bearing can work stably at a higher speed and is suitable for high-speed rotation applications. The advantages are very suitable for this application.

[0016] Further, the bearing is fixed between the housing and the hollow spindle by a threaded locking nut. A threaded locking nut, also known as a flange lock nut or a nyloc flange lock nut, is a special nut design that features a larger flange face and an embedded locking device. This nut combines the functions of a flange nut and a flat washer, and usually also includes a mechanism to prevent the threads from loosening. The advantages are very suitable for this application.

[0017] Furthermore, a keyway is provided at the rear end of the main shaft, and a pulley or a gear is connected through a flat key to realize a driving connection with a motor. In this way, it is convenient to connect with the motor drive, the technology is mature and reliable, the maintenance is simple, and the difficulty of realization is low.

[0018] Furthermore, the shell is connected to the hollow hydraulic cutting cylinder through a cutting cylinder mounting plate.

[0019] Furthermore, the housing is provided with front and rear end covers, and a front dust cover is also provided outside the front end cover, which can achieve a good dustproof effect.

[0020] Furthermore, the motor is drivingly connected to the hollow main shaft via a pulley and a synchronous belt, and the motor is fixed to the motor mounting position via a threaded fastener. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal structure of this application;

[0022] Figure 2 It is a schematic diagram of the connection method for installing the motor in this application;

[0023] Figure 3 It is a schematic diagram of the motor installation in this application.

[0024] In the figure, 1. housing; 2. servo motor; 3. hollow spindle; 4. hollow hydraulic cutting cylinder; 5. spacer; 6. thread locking nut; 7. broaching rod; 8. broaching claw; 9. swivel joint; 10. butterfly spring; 11. front cover; 12. rear cover; 13. front dust cover; 14. washer; 15. bearing; 31. tapered hole; 32. pulley; 33. synchronous belt. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0026] Those skilled in the art should understand that, in the disclosure of the present application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0027] like Figure 1-3 As shown, the hydraulic automatic cutting spindle head includes:

[0028] The housing 1 has a mounting cavity inside and a motor mounting position outside, and is connected to the hollow main shaft 3 through the motor drive;

[0029] In this embodiment, the motor mounting position is used to install the motor, and the installation method is the default installation method of the motor, such as bolt fixing. The motor can be a reduction motor or an existing servo motor 2. The hollow main shaft 3 is driven to rotate by the pulley 32 and the synchronous belt 33. The pulley 32 is installed on the hollow main shaft 3 through a flat key, and the transmission ratio is 1:1.

[0030] The hollow main shaft 3 is installed in the installation cavity, and the front end of the hollow main shaft 3 is provided with a tapered hole 31 connected to the internal hollow structure, and the rear end is connected to the motor;

[0031] In this embodiment, the hollow spindle 3 is installed in the installation cavity through multiple angular contact ball bearings 15, and is fixed by the front cover 11 and the rear cover 12, and the front dust cover 13 is installed outside the front cover 11, wherein the angular contact ball bearings 15 are provided with spacers 5, and the angular contact ball bearings 15 are fixed by the thread flank locking nut 6. The tapered hole 31 is used to connect the tool, and can also be used for the opening and contraction of the broaching claw 8. Preferably, each bearing 15 is cleaned with No. 120 aviation gasoline, and NOK-Kluber IsoflexNBU 15 spindle high-speed grease is used, and the filling amount is 158.7cc / piece for the front bearing and 157cc / piece for the rear bearing.

[0032] The broaching rod 7 is a hollow structure, installed in the hollow main shaft 3, with the front end connected to a broaching claw 8 located inside the hollow main shaft 3, and the rear end extending out of the hollow main shaft 3 and into the hollow hydraulic broaching cylinder 4 and connected to a rotary joint 9 extending out of the hollow hydraulic broaching cylinder 4, the rotary joint 9 is used to connect to a water source;

[0033] In this embodiment, the broaching rod 7 is combined with the structure of the existing knife-beating block, that is, the tail end of the broaching rod 7 is provided with a plurality of steps, wherein the step near the tail end can be hit by the push rod and other components of the hollow hydraulic knife-beating cylinder 4, so that the broaching rod 7 can move, and the broaching rod 7 returns to the initial position by the butterfly spring 10. The remaining steps can be used to install the butterfly spring 10, etc. Preferably, the material of the broaching rod 7 is 20CrMo, the surface hardening hardness is 55-60HRC, and the surface is blackened. The structure of the broaching claw 8 is the prior art, and its principle and structure are not repeated here.

[0034] Preferably, the model of the rotary joint 9 is A10-1372-05L, which can ensure stable water discharge from the center of the hollow main shaft 3.

[0035] The butterfly spring 10 is located between the hollow spindle 3 and the broaching rod 7;

[0036] In this embodiment, washers 14 are provided at both the front and rear ends of the butterfly spring 10, and the washers 14 are located between the butterfly spring 10 and the step of the broaching rod 7 and between the butterfly spring 10 and the inner step of the hollow main shaft 3. A sealing ring is also provided on the washer 14 at the front end of the butterfly spring 10. Preferably, the washers 14 are all made of 45#.

[0037] The hollow hydraulic cutting cylinder 4 is installed at the rear end of the housing 1.

[0038] In this embodiment, the housing 1 is connected to the hollow hydraulic cutting cylinder 4 via a cutting cylinder mounting plate. Preferably, the model of the hollow hydraulic cutting cylinder 4 is HUC-120N14-408.

[0039] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0040] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0041] Although this article uses more terms such as housing 1, servo motor 2, hollow spindle 3, hollow hydraulic knife cylinder 4, spacer 5, thread lock nut 6, broaching rod 7, broaching claw 8, rotary joint 9, butterfly spring 10, front cover 11, rear cover 12, front dust cover 13, washer 14, bearing 15, tapered hole 31, pulley 32, synchronous belt 33, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application.

[0042] The present application is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of this application. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present application.

Claims

1. A hydraulic automatic tooling spindle head, characterized in that: include: The housing has a mounting cavity inside and a motor mounting position outside, and is connected to the hollow spindle through the motor drive; A hollow main shaft is installed in the installation cavity, and a conical hole is provided at the front end of the hollow main shaft and communicates with the internal hollow structure, and a motor is connected at the rear end; The broaching rod is a hollow structure, installed in the hollow main shaft, with the front end connected to the broaching claw located inside the hollow main shaft, and the rear end extending out of the hollow main shaft into the hollow hydraulic broaching cylinder and connected to a rotary joint extending out of the hollow hydraulic broaching cylinder, the rotary joint is used to connect to a water source; A butterfly spring is located between the hollow main shaft and the broaching rod; The hollow hydraulic cutting cylinder is installed at the rear end of the shell.

2. The hydraulic automatic tooling spindle head according to claim 1 is characterized in that: The broaching rod is quenched and has a surface hardness greater than 55HRC.

3. The hydraulic automatic tooling spindle head according to claim 1 is characterized in that: Washers are provided at both the front and rear ends of the butterfly spring. The washers are located between the butterfly spring and the steps of the broaching rod and between the butterfly spring and the internal steps of the hollow main shaft. A sealing ring is also provided on the washer at the front end of the butterfly spring.

4. The hydraulic automatic tooling spindle head according to claim 1 is characterized in that: A plurality of bearings are arranged between the housing and the hollow main shaft.

5. The hydraulic automatic tooling spindle head according to claim 4 is characterized in that: The bearing is an angular contact ball bearing.

6. The hydraulic automatic tooling spindle head according to claim 4, characterized in that: The bearing is fixed between the housing and the hollow main shaft through a threaded locking nut.

7. The hydraulic automatic tooling spindle head according to claim 1, characterized in that: The rear end of the main shaft is provided with a keyway, which is connected to a pulley or a gear through a flat key to achieve driving connection with the motor.

8. A hydraulic automatic tooling spindle head according to any one of claims 1 to 7, characterized in that: The shell is connected to the hollow hydraulic cutting cylinder via a cutting cylinder mounting plate.

9. A hydraulic automatic tooling spindle head according to any one of claims 1 to 7, characterized in that: The shell body is provided with front and rear end covers, and a front dust cover is also provided outside the front end cover.

10. A hydraulic automatic tooling spindle head according to any one of claims 1 to 7, characterized in that: The motor is drivingly connected to the hollow main shaft via a pulley and a synchronous belt, and the motor is fixed to the motor mounting position via a threaded fastener.

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