Supporting tailstock and five-axis cradle rotary table

Abstract

The utility model discloses a supporting tailstock and a five-axis cradle rotary table. The supporting tail seat comprises a mounting plate, a seat body fixed on the mounting plate, a core shaft rotationally connected in the seat body through a bearing, and a turntable fixed at the tail end of the core shaft; the brake device is characterized by further comprising a locking sleeve and a brake ring fixed to the seat body through the locking sleeve, the brake ring is arranged on the outer side of the rotary disc in a sleeving mode and comprises a brake pad arranged close to the outer side of the rotary disc, one end of the locking sleeve abuts against the brake pad through a fourth sealing ring, and the other end of the locking sleeve abuts against the brake pad through a fifth sealing ring. The locking sleeve is provided with a pressure cavity right opposite to the brake pad, and the pressure cavity and the rotary disc are located on the two opposite sides of the brake pad respectively. The locking sleeve and the brake ring are arranged on the outer side face of the rotary disc in a sleeving mode, the pressure cavity is formed in the end face, abutting against the brake pad of the brake ring, of the locking sleeve, the rotary disc is braked by changing the pressure in the pressure cavity and being in linkage with the brake pad, and the brake structure is reliable in work, simple in overall structure, easy to assemble and convenient to maintain in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a supporting tailstock and a five-axis cradle turntable using the supporting tailstock. Background Art

[0002] The five-axis cradle turntable is a high-end functional component in CNC machine tools. It is mainly used to realize the curved surface processing of workpieces. It is usually composed of four parts: B-axis assembly, swing arm, worktable assembly and supporting tailstock. The two ends of the swing arm are connected to the B-axis assembly and the supporting tailstock respectively, and the worktable assembly is installed on the swing arm. The supporting tailstock is used to support and position the workpiece to avoid vibration and deformation of the workpiece to ensure processing accuracy. Therefore, the supporting tailstock must have a brake function.

[0003] Chinese patent CN220761021U discloses a tailstock mechanism, including a tailstock and a turntable, a rotating shaft is rotatably connected to the tailstock through a bearing, the turntable is fixedly sleeved on the rotating shaft, an annular connecting groove is provided on the inner surface of the turntable, the inner end of the brake pad is inserted into the annular connecting groove and fixed by a thread, and a brake assembly used in conjunction with the brake pad is arranged inside the tailstock. Since the brake structure is arranged inside the tailstock, the overall structure of the tailstock is relatively complicated, and the operation of replacing and maintaining the brake pad is very cumbersome. Utility Model Content

[0004] The utility model aims to at least solve the technical problems that the existing tailstock has a built-in brake mechanism which causes a complex structure and is not conducive to maintenance operations, and provides a tailstock support and a five-axis cradle turntable using the tailstock support.

[0005] The utility model proposes a supporting tailstock, comprising a mounting plate, a seat body fixed on the mounting plate, a core shaft rotatably connected to the seat body through a bearing, and a turntable fixed to the end of the core shaft; the utility model is characterized in that it also comprises a locking sleeve, a brake ring fixed to the seat body through the locking sleeve, the brake ring sleeve is arranged on the outer side of the turntable and comprises a brake pad arranged close to the outer side of the turntable, one end of the locking sleeve is in contact with the brake pad through a fourth sealing ring, the locking sleeve has a pressure chamber arranged opposite to the brake pad, and the pressure chamber and the turntable are respectively located on two opposite sides of the brake pad.

[0006] Preferably, at least one fourth sealing ring is provided on two opposite sides of the pressure chamber, respectively, so that the locking sleeve and the brake pad are kept in sealing contact.

[0007] Preferably, the brake ring further comprises a brake body and an elastic arm, the brake pad is fixedly connected to the brake body via the elastic arm, and the brake body is fixedly connected to the seat body via the locking sleeve.

[0008] Preferably, the pressure chamber is arranged close to the end of the brake pad away from the brake body.

[0009] Preferably, a limiting step is provided on the outer side surface of the seat body, and two opposite ends of the locking sleeve abut between the limiting step and the brake pad.

[0010] Preferably, the brake ring is sealed to the rotating disk via an oil seal, and the oil seal and the seat are respectively located on two opposite sides of the brake pad.

[0011] Preferably, a sealing ring is provided between the mounting plate and the seat body, or / and between the core shaft and the turntable, or / and between the locking sleeve and the seat body, or / and on the outer side surface of the seat body.

[0012] Preferably, the supporting tailstock also includes a pressure transmission pipe, which includes a first pipeline arranged in the seat body and a second pipeline arranged in the locking sleeve, and the second pipeline is connected between the first pipeline and the pressure chamber; the end of the first pipeline has a first interface, and the end of the second pipeline has a second interface.

[0013] Preferably, two sixth sealing rings are provided between the locking sleeve and the seat body, and the two sixth sealing rings are located at two opposite sides of the connection between the first pipeline and the second pipeline, so that the first pipeline and the second pipeline are sealed and connected.

[0014] Correspondingly, the utility model also discloses a five-axis cradle turntable having the supporting tailstock.

[0015] Compared with the prior art, the utility model arranges the locking sleeve and the brake ring on the outer side of the turntable, and sets a pressure chamber on the end face where the locking sleeve and the brake pad of the brake ring abut against each other. The brake of the turntable is achieved by changing the pressure in the pressure chamber and linking with the brake pad. The brake structure works reliably, has a simple overall structure, is easy to assemble and is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure supporting the tailstock.

[0017] Figure 2 It is a front view of the supporting tailstock.

[0018] Figure 3 yes Figure 2 Schematic diagram of the AA cross-section structure.

[0019] Figure 4 yes Figure 3 A partial enlarged view of .

[0020] The meanings of the numbers in the figure are as follows: 1-mounting plate, 2-seat body, 21-support step, 22-limit step, 23-first pipeline, 24-first interface, 3-core shaft, 4-bearing, 5-turntable, 6-locking sleeve, 61-second pipeline, 62-pressure chamber, 63-second interface, 7-brake ring, 71-brake body, 72-elastic arm, 73-brake pad, 8-oil seal, 91-fixing part, 92-first sealing ring, 93-second sealing ring, 94-avoidance position, 95-third sealing ring, 96-fourth sealing ring, 97-fifth sealing ring, 98-sixth sealing ring. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0022] Combination Figure 1-Figure 4 As shown, the utility model discloses a supporting tailstock, including a mounting plate 1, a seat body 2 fixed on the mounting plate 1, a core shaft 3 rotatably connected to the seat body 2 through a bearing 4, and a turntable 5 fixed to the end of the core shaft 3, wherein the core shaft 3 drives the turntable 5 to rotate relative to the seat body 2 through the bearing 4.

[0023] For example, a support step 21 is provided on the inner side surface of the seat body 2, and the bearing 4 is sleeved on the core shaft 3 and is locked on the support step 21 by a fixing member 91 such as a screw, so as to realize the assembly of the core shaft 3 and the seat body 2.

[0024] In order to prevent debris from entering the interior of the supporting tailstock through the assembly gap between the mounting plate 1 and the seat body 2 during use: a first sealing ring 92 is provided between the mounting plate 1 and the seat body 2, and a second sealing ring 93 is provided between the end face of the core shaft 3 and the turntable 5.

[0025] The assembly end faces of the mandrel 3 and the turntable 5 need to be finely processed to reduce the surface roughness between them to avoid affecting the rotation accuracy. In order to reduce the area required for fine processing and reduce the processing cost, a first groove is provided on the end face of the mandrel 3, and a second groove is correspondingly provided on the end face of the turntable 5, and the first and second grooves together form an avoidance position 94.

[0026] In addition, a fifth sealing ring 97 is provided on the outer side of the seat body 2. When the seat body 2 is used in the five-axis cradle turntable, the seat body 2 is assembled and connected with other components of the five-axis cradle turntable. At this time, the fifth sealing ring 97 can prevent liquid or debris from entering the connection.

[0027] The supporting tailstock is used for supporting and positioning the workpiece. For this purpose, the supporting tailstock is provided with a braking structure so that the turntable 5 can be rotated and stopped as required by the braking structure.

[0028] The utility model arranges the brake structure on the outside of the rotating disk 5, which can simplify the structure of the brake structure and also facilitate the assembly and subsequent maintenance of the brake structure.

[0029] Specifically, the supporting tailstock also includes a braking structure, which specifically includes a locking sleeve 6 and a brake ring 7 fixed to the seat body 2 through the locking sleeve 6, the brake ring 7 is sleeved on the outside of the turntable 5 and includes a brake pad 73 arranged close to the outside of the turntable 5, one end of the locking sleeve 6 is in contact with the brake pad 73 through a fourth sealing ring 96, and the locking sleeve 6 has a pressure chamber 62 arranged opposite to the brake pad 73, and the pressure chamber 62 and the turntable 5 are respectively located on two opposite sides of the brake pad 73.

[0030] The fourth sealing rings 96 are respectively provided on two opposite sides of the pressure chamber 62 , and the fourth sealing rings 96 can ensure that the brake pad 73 always maintains sealed contact with the locking sleeve 6 when the rotating disk 5 is braked and swung.

[0031] When gaseous or liquid brake medium is injected into the pressure chamber 62, the pressure in the pressure chamber 62 increases, and the pressure of the pressure chamber 62 generates a thrust toward the turntable 5 on the brake pad 73, so that the brake pad 73 abuts against the turntable 5, thereby stopping the turntable 5.

[0032] The brake ring 7 includes a brake body 71 and a brake pad 73 fixedly connected to the brake body 71 through an elastic arm 72, and the brake pad 73 is arranged close to the outer side of the rotating disk 5. Preferably, the pressure chamber 62 is arranged close to the end of the brake pad 72 away from the brake body, so that the brake pad 72 can have better braking performance under the pressure of the pressure chamber 62.

[0033] When the pressure in the pressure chamber 62 increases, a thrust is generated on the brake pad 73 toward the turntable 5, and the brake pad 73 swings toward the turntable 5, thereby driving the elastic arm 72 to produce elastic deformation; when the pressure in the pressure chamber 62 decreases, the brake pad 73 is reset under the recovery elasticity of the elastic arm 72, so that the brake pad 73 is separated from the outer side of the turntable 5, allowing the turntable 5 to rotate as needed.

[0034] Among them, the brake ring 7 is fixedly connected to the locking sleeve 6 through the brake body 71, and the locking sleeve 6 is fixed on the seat body 2, so that the brake body 71, the locking sleeve 6 and the seat body 2 form an integrated assembly structure, so that the locking sleeve 6 will not be displaced relative to the brake pad 73 when the pressure in the pressure chamber 62 increases, ensuring that the pressure chamber 62 and the brake pad 73 cooperate to effectively brake the turntable 5.

[0035] A limiting step 22 is provided on the outer side surface of the seat body 2 , and two opposite ends of the locking sleeve 6 abut between the limiting step 22 and the brake pad 73 .

[0036] The supporting tailstock also includes a pressure transmission pipe connected to the pressure chamber 62, and the pressure transmission pipe includes a first pipeline 23 arranged in the seat body 2 and a second pipeline 61 arranged in the locking sleeve 6, and the second pipeline 61 is connected between the first pipeline 23 and the pressure chamber 62; the end of the first pipeline 23 has a first interface 24, and the end of the second pipeline 61 has a second interface 63.

[0037] The gaseous or liquid brake medium enters the first pipeline 23 from the first interface 24, and then flows into the second pipeline 61 and enters the pressure chamber 62, thereby increasing the pressure of the pressure chamber 62. When braking is not required, the brake medium is partially or completely discharged through the second interface 63 to reduce the pressure of the pressure chamber 62.

[0038] Two sixth sealing rings 98 are provided between the locking sleeve 6 and the seat body 2. The two sixth sealing rings 98 are located at two opposite sides of the connection between the first pipeline 23 and the second pipeline 61, so that the first pipeline 23 and the second pipeline 61 can be kept reliably sealed and connected by the two sixth sealing rings 98 to avoid leakage of the brake medium.

[0039] In addition, in order to prevent liquid or debris from entering the interior of the support tailstock, the brake ring 7 and the turntable 5 are sealed by an oil seal 8, and the oil seal 8 and the seat body 2 are respectively located on two opposite sides of the brake pad 73, so that the oil seal 8 prevents external liquid or debris from entering the gap reserved between the brake pad 73 and the turntable 5.

[0040] Furthermore, a third sealing ring 95 is also provided between the locking sleeve 6 and the seat body 2 , and the third sealing ring 95 is used to prevent liquid or debris from entering the supporting tailstock through the assembly analysis between the locking sleeve 6 and the seat body 2 .

[0041] The utility model also discloses a five-axis cradle turntable, which has the above-mentioned supporting tailstock and has the advantages of reliable operation and easy and convenient assembly and later maintenance.

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

Claims

1. A tailstock support, comprising a mounting plate, a seat body fixed on the mounting plate, a spindle rotatably connected to the seat body through a bearing, and a turntable fixed to the end of the spindle; characterized in that: It also includes a locking sleeve and a brake ring fixed to the seat body through the locking sleeve, the brake ring is sleeved on the outside of the turntable and includes a brake pad arranged close to the outside of the turntable, one end of the locking sleeve is in contact with the brake pad through a fourth sealing ring, the locking sleeve has a pressure chamber arranged opposite to the brake pad, and the pressure chamber and the turntable are respectively located on two opposite sides of the brake pad.

2. The tailstock support according to claim 1, characterized in that: At least one fourth sealing ring is respectively disposed on two opposite sides of the pressure chamber to keep the locking sleeve in sealing contact with the brake pad.

3. The tailstock support according to claim 1, characterized in that: The brake ring further comprises a brake body and an elastic arm, the brake pad is fixedly connected to the brake body via the elastic arm, and the brake body is fixedly connected to the seat body via the locking sleeve.

4. The tailstock support according to claim 3, characterized in that: The pressure chamber is arranged close to the end of the brake pad away from the brake body.

5. The tailstock support according to claim 1, characterized in that: A limiting step is provided on the outer side surface of the seat body, and two opposite ends of the locking sleeve abut between the limiting step and the brake pad.

6. The tailstock support according to claim 1, characterized in that: The brake ring is sealed and connected to the rotating disk via an oil seal, and the oil seal and the seat are respectively located at two opposite sides of the brake pad.

7. The tailstock support according to claim 1, characterized in that: A sealing ring is provided between the mounting plate and the seat body, or / and between the core shaft and the turntable, or / and between the locking sleeve and the seat body, or / and on the outer side surface of the seat body.

8. The tailstock support according to any one of claims 1 to 7, characterized in that: The supporting tailstock further comprises a pressure transmission pipe, the pressure transmission pipe comprising a first pipeline arranged in the seat body and a second pipeline arranged in the locking sleeve, the second pipeline being connected between the first pipeline and the pressure chamber; The end of the first pipeline has a first interface, and the end of the second pipeline has a second interface.

9. The tailstock support according to claim 8, characterized in that: Two sixth sealing rings are provided between the locking sleeve and the seat body, and the two sixth sealing rings are located at two opposite sides of the connection between the first pipeline and the second pipeline, so that the first pipeline and the second pipeline are sealed and connected.

10. A five-axis cradle turntable, characterized in that: A tailstock support as claimed in any one of claims 1 to 9.

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