Pneumatic ultrathin main shaft clamping mechanism

Abstract

The utility model provides a pneumatic ultrathin main shaft clamping mechanism, which relates to the technical field of five-axis machining centers and comprises a clamping mechanism sleeved on the periphery of a main shaft. The clamping mechanism comprises a main body seat, a cavity, sealing rubber gaskets, an elastic steel sheet, a brake ring and a gas input and output hole, the cavity is formed in the main body seat and surrounds the main shaft, the sealing rubber gaskets are symmetrically installed in the center of the cavity, and the elastic steel sheet is installed on the outer sides of the sealing rubber gaskets in an attached mode; according to the pneumatic ultrathin main shaft clamping mechanism, original hydraulic driving is changed into pneumatic driving, so that the production cost is greatly reduced, and high cleanliness is achieved; according to the pneumatic ultrathin main shaft clamping mechanism, after an air source is cut off for some reason, the main shaft in a static state can be quickly clamped, so that the production safety of a machine tool can be effectively ensured; according to the pneumatic ultrathin main shaft clamping mechanism, a pneumatic device is used, so that very short reaction time can be obtained, and the system can realize very short clamping action time.

Description

Technical Field

[0001] This utility model relates to the field of five-axis machining center technology, and in particular to a pneumatic ultra-thin spindle clamping mechanism. Background Technology

[0002] The spindle clamping mechanism is an important component of a five-axis machining center. After the machine tool's swivel head or worktable rotation axis rotates to the machining angle, the rotation axis needs to be fixed and locked to ensure that the worktable and swivel head do not rotate during the product processing. The spindle clamping mechanism is an indispensable component of a five-axis machining center; otherwise, it is impossible to complete the precise machining of the product.

[0003] Existing spindle clamping mechanisms are controlled by hydraulic drive (e.g.) Figure 1 As shown, the stop plate is connected to the spindle. The hydraulic system's hydraulic valve inputs oil pressure through the oil inlet to drive the piston to move and press the brake pad against the stop plate to complete the clamping action. After the oil pressure is released, the return spring resets the spindle to complete the release action. However, this spindle clamping mechanism is relatively complex. The hydraulic structure and related parts require high precision machining and fit, occupy a large space, and require additional hydraulic system pipelines and valve group components, resulting in high production and assembly costs. The hydraulic response time is long, and shortening the response time requires additional costs. If the hydraulic pressure is lost abnormally, the clamping mechanism will also lose its clamping force, posing a safety risk to machine tool production. The spindle structure is complex, the clamping mechanism is cumbersome to install, and if oil leakage occurs, maintenance is inconvenient and cleanliness is poor. Therefore, we propose a pneumatic ultra-thin spindle clamping mechanism. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of the existing technology. At present, the spindle clamping mechanism is relatively complex, the hydraulic structure-related parts require high precision machining and fit, occupy a large space, and require additional hydraulic system pipelines and valve group matching parts, resulting in high production and assembly costs. The hydraulic response time is long, and shortening the response time requires additional costs. After abnormal loss of hydraulic pressure, the clamping mechanism will lose its clamping force at the same time, which poses a risk to machine tool production safety. The spindle structure is complex, the clamping mechanism is cumbersome to install, and if oil leakage occurs, maintenance is inconvenient and cleanliness is poor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic ultra-thin spindle clamping mechanism includes a clamping mechanism sleeved around the spindle.

[0007] The clamping mechanism includes a main body, a chamber, a sealing rubber gasket, an elastic steel sheet, a brake ring, and gas input / output holes. The main body forms a chamber around the main shaft. A sealing rubber gasket is symmetrically installed at the center of the chamber. An elastic steel sheet is fitted to the outside of the sealing rubber gasket. A brake ring is provided on the side of the elastic steel sheet near the main shaft. Gas input / output holes communicating with the chamber are symmetrically opened on the outer edge of the main body.

[0008] Furthermore, the outer periphery of the main shaft is fitted with a locking groove corresponding to the brake ring.

[0009] Furthermore, the sealing rubber gasket divides the chamber into an inner cavity and an outer cavity.

[0010] Furthermore, the sealing rubber gaskets are connected to one side of the gas input / output port, and the outer cavity is connected to the other side of the gas input / output port.

[0011] Furthermore, a plug is installed at the upper end of the gas input / output port. The gas input / output port connected to the sealing rubber gasket is the OPEN end, while the gas input / output port connected to the external cavity is the CLOSE end.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This pneumatic ultra-thin spindle clamping mechanism changes the original hydraulic drive to a pneumatic drive, which greatly reduces production costs and has a high degree of cleanliness.

[0014] 2. This pneumatic ultra-thin spindle clamping mechanism can quickly clamp the spindle when it is stationary after the air supply is disconnected for any reason, which can effectively ensure the production safety of the machine tool.

[0015] 3. This pneumatic ultra-thin spindle clamping mechanism uses a pneumatic device, which can achieve a very short response time, and the system can achieve a very short clamping action time.

[0016] This pneumatic ultra-thin spindle clamping mechanism has a very small thickness, which can increase the usable space of the spindle mechanism; it has a simple structure, can work normally even with slight air leakage, is driven by an air source, has an extremely low failure rate, and is easy to install and replace, which greatly reduces production and after-sales costs, and at the same time effectively reduces the overall cost of the spindle clamping mechanism. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a hydraulically driven spindle clamping mechanism in the prior art.

[0018] Figure 2 A side anatomical diagram of the overall structure of a pneumatic ultra-thin spindle clamping mechanism provided by this utility model;

[0019] Figure 3 A schematic diagram of the clamping mechanism in the released state of a pneumatic ultra-thin spindle clamping mechanism provided by this utility model;

[0020] Figure 4 A schematic diagram of the clamping state structure of a pneumatic ultra-thin spindle clamping mechanism provided by this utility model;

[0021] Figure 5 Schematic diagram 2 of the clamping state structure of a pneumatic ultra-thin spindle clamping mechanism provided by this utility model.

[0022] Legend:

[0023] 1. Spindle;

[0024] 2. Clamping mechanism; 21. Main body seat; 22. Chamber; 221. Inner cavity; 222. Outer cavity; 23. Sealing rubber gasket; 24. Elastic steel sheet; 25. Brake ring; 26. Gas input / output port; 261. Plug; 262. OPEN end; 263. CLOSE end. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example 1

[0030] like Figure 2-5 As shown, this utility model provides a technical solution: a pneumatic ultra-thin spindle clamping mechanism, including a clamping mechanism 2 installed around the spindle 1; the clamping mechanism 2 includes a main body 21, a chamber 22, a sealing rubber gasket 23, an elastic steel sheet 24, a brake ring 25, and a gas input / output hole 26. The chamber 22 is formed inside the main body 21 around the spindle 1. The sealing rubber gasket 23 is symmetrically installed at the center of the chamber 22. The elastic steel sheet 24 is fitted to the outside of the sealing rubber gasket 23. The brake ring 25 is provided on the side of the elastic steel sheet 24 near the spindle 1. The outer edge of the main body 21 is symmetrically provided with gas input / output holes 26 that communicate with the chamber 22. The gas input / output holes 26 are connected to an external gas source for gas input and output.

[0031] Example 2

[0032] like Figure 2-5 As shown, the outer periphery of the main shaft 1 is fitted with a locking groove corresponding to the brake ring 25. When the mechanism is working, the brake ring 25 contacts the locking groove of the main shaft 1 to achieve a clamping effect.

[0033] The sealing rubber gasket 23 divides the chamber 22 into an inner cavity 221 and an outer cavity 222. The sealing rubber gasket 23 is symmetrically installed at the inner center of the chamber 22, which plays a role in sealing and isolation.

[0034] The sealing rubber gaskets 23 are connected to the gas input / output port 26 on one side, and the outer cavity 222 is connected to the gas input / output port 26 on the other side.

[0035] A plug 261 is installed at the upper end of the gas input / output port 26. The gas input / output port 26 connected to the sealing rubber gasket 23 is the OPEN end 262, while the gas input / output port 26 connected to the outer cavity 222 is the CLOSE end 263.

[0036] Working principle: This pneumatic ultra-thin spindle clamping mechanism uses the bending and springback action of the elastic steel sheet 24 on the brake ring 25 of the clamping mechanism to cause the brake ring 25 to perform corresponding inward micro-deformation, contraction and reset actions, thereby achieving the clamping and loosening action of the spindle 1. The elastic steel sheet 24 and the sealing rubber gasket 23 are integrated. The sealing rubber gasket 23 separates the two hollow parts of the clamping mechanism into an inner cavity 221 and an outer cavity 222. Driven by air pressure, the air pressure enters the inner cavity 221 and the outer cavity 222 respectively, causing the elastic steel sheet 24 to complete the bending and springback action.

[0037] Furthermore, considering both the solution and its working principle:

[0038] ①According to Figure 3 The following is the process for releasing the clamping mechanism of spindle 1:

[0039] Compressed air is input from the OPEN end 262, and the gas in the outer cavity 222 is discharged from the CLOSE end 263. The air pressure causes the inner cavity 221 to expand, and the elastic steel sheet 24 is bent under pressure. The clamping mechanism is released, the inner ring of the body is reduced and reset, and a gap is created between the inner ring and the main shaft 1, thereby releasing the clamping mechanism 2. At this time, the main shaft 1 can rotate.

[0040] ②According to Figure 4-5 The following is the clamping process of the spindle 1 clamping mechanism:

[0041] When the compressed air input at the OPEN end 262 is disconnected, the elastic steel sheet 24 rebounds, and the clamping mechanism brake ring 25 is subjected to increased force and contracts inward, thereby clamping the spindle 1. At this time, the spindle 1 is fixed and cannot rotate. No drive source is required when clamping the spindle 1, and there will be no safety issues when the machine tool experiences an abnormal air supply interruption. When the load on the machine tool spindle 1 increases, compressed air can be input from the CLOSE end 263 to increase the force on the elastic steel sheet 24 and apply a greater clamping force to the inner ring of the clamping mechanism.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic ultra-thin spindle clamping mechanism, characterized in that: Includes a clamping mechanism (2) installed around the spindle (1); The clamping mechanism (2) includes a main body (21), a chamber (22), a sealing rubber gasket (23), an elastic steel sheet (24), a brake ring (25), and a gas input / output hole (26). The chamber (22) is formed inside the main body (21) around the main shaft (1). The sealing rubber gasket (23) is symmetrically installed at the center of the chamber (22). The elastic steel sheet (24) is fitted to the outside of the sealing rubber gasket (23). The elastic steel sheet (24) is provided with a brake ring (25) on the side of the main shaft (1). The outer edge of the main body (21) is symmetrically provided with gas input / output holes (26) that communicate with the chamber (22).

2. The pneumatic ultra-thin spindle clamping mechanism according to claim 1, characterized in that: The outer periphery of the main shaft (1) is fitted with a locking groove corresponding to the brake ring (25).

3. The pneumatic ultra-thin spindle clamping mechanism according to claim 1, characterized in that: The sealing rubber gasket (23) divides the chamber (22) into an inner cavity (221) and an outer cavity (222).

4. The pneumatic ultra-thin spindle clamping mechanism according to claim 3, characterized in that: The sealing rubber gaskets (23) are connected to one side of the gas input / output port (26), and the outer cavity (222) is connected to the other side of the gas input / output port (26).

5. The pneumatic ultra-thin spindle clamping mechanism according to claim 4, characterized in that: A plug (261) is installed at the upper end of the gas input / output port (26). The gas input / output port (26) connected to the sealing rubber gasket (23) is the OPEN end (262), while the gas input / output port (26) connected to the outer cavity (222) is the CLOSE end (263).

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