Clamping tool for hollow shaft

Abstract

The utility model relates to a clamping tool for a hollow shaft. The clamping tool comprises a mounting flange, a clamp arranged on the mounting flange, a tensioning mechanism connected with the clamp and an air tightness detection mechanism. The clamp comprises a connecting plate connected with the mounting flange and a mandrel arranged on the side, away from the mounting flange, of the connecting plate, the mandrel is inserted into the hollow shaft, and the mandrel is matched with the tensioning mechanism to clamp and fix the hollow shaft. The airtightness detection mechanism comprises a mounting hole formed in the side, away from the mounting flange, of the connecting plate, a gas detection valve element in sliding connection with the mounting hole, a gas detection ring arranged on the gas detection valve element, an airtightness detection assembly communicating with the gas detection ring, an atmospheric ring arranged on the inner wall of the mounting hole and used for communicating with the atmospheric environment, and a limiting assembly. When the hollow shaft on the mandrel is not clamped in place, the limiting assembly pushes the gas detection ring to be communicated with the atmosphere ring, and when the hollow shaft on the mandrel is clamped in place, the hollow shaft pushes the gas detection ring to be separated from the atmosphere ring. Whether the hollow shaft is clamped in place or not can be detected, and the collision risk is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hollow shaft machining device, in particular to a kind of clamping tool of hollow shaft. BACKGROUND

[0002] In the processing of hollow shaft, fixture plays an important role, and the fixture is fixed by accurate positioning and clamping, to ensure the position stability of hollow shaft in the processing, avoid the processing error caused by workpiece movement, so as to ensure the machining precision. By using the fixture, workpiece can be quickly clamped and disassembled, reduce non-processing time, improve the utilization rate of machine tool and production efficiency.

[0003] However, there is no device to detect whether the hollow shaft is clamped in place on the current hollow shaft clamp, so the phenomenon of hollow shaft part clamping not in place without machine alarm may occur in the processing process, and the risk of machine collision may occur. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the present application provides a kind of clamping tool of hollow shaft.

[0005] The clamping tool of hollow shaft provided by the present application adopts the following technical scheme:

[0006] A kind of clamping tool of hollow shaft, including installation flange, setting on the installation flange clamp, with the clamp connection tight mechanism and airtight detection mechanism;The clamp includes the connecting plate connected with the installation flange and the mandrel arranged on the side of the connecting plate away from the installation flange, the mandrel is inserted into the hollow shaft, the mandrel is fixed with the tight mechanism and is fixed, the airtight detection mechanism includes installation hole opened on the side of the connecting plate away from the installation flange, air detection valve core connected with the installation hole, air detection ring opened on the air detection valve core, airtight detection assembly communicated with the air detection ring, atmosphere ring for communicating with atmosphere environment opened on the inner wall of the installation hole and limiting assembly, when the hollow shaft on the mandrel is not clamped in place, the limiting assembly pushes the air detection ring and the atmosphere ring is communicated, when the hollow shaft on the mandrel is clamped in place, the hollow shaft pushes the air detection ring and the atmosphere ring is separated.

[0007] By adopting the technical scheme, the hollow shaft is clamped and fixed by the cooperation of the mandrel and the tensioning mechanism, and the preset value is set by the air tightness detection assembly; when the hollow shaft is not clamped in place, the air detection ring is in communication with the atmosphere ring, and the air tightness detection assembly detects that the pressure in the air detection ring is lower than the preset value; when the hollow shaft is clamped in place, the hollow shaft pushes the air detection valve core to move, so that the air detection ring on the air detection valve core is staggered with the atmosphere ring, the air detection ring abuts against the inner wall of the mounting hole, and the air tightness detection assembly detects that the pressure in the air detection ring reaches the preset value. Whether the hollow shaft is clamped in place is judged according to whether the pressure in the air detection ring reaches the preset value, thereby reducing the occurrence of machine collision accidents and improving the machining precision and safety of the hollow shaft.

[0008] Preferably, the air tightness detection assembly comprises a gas supply system and a pressure detection device, one end of the gas supply system is in communication with the air detection ring, and the other end is connected with the pressure detection device.

[0009] By adopting the technical scheme, the gas supply system supplies gas to the air detection ring, and the pressure detection device detects whether the pressure in the air detection ring reaches the preset value, so as to judge whether the hollow shaft is clamped in place.

[0010] Preferably, the tensioning mechanism comprises a connecting hole formed in the mandrel, a driving assembly arranged in the connecting hole, and a tension sleeve connected with the driving assembly, one end of the mandrel away from the connecting plate is provided with a first inclined surface, the inside of the tension sleeve is provided with a second inclined surface, the first inclined surface and the second inclined surface are arranged in parallel, and the driving assembly is used to drive the tension sleeve to translate along the axis of the mandrel.

[0011] By adopting the technical scheme, the driving assembly drives the tension sleeve to translate along the axis of the mandrel, and the first inclined surface and the second inclined surface change the diameter size of the tension sleeve, so as to realize the clamping or loosening of the hollow shaft.

[0012] Preferably, the driving assembly comprises an oil cylinder, a connecting rod connected with the oil cylinder, and a pull rod, one end of the pull rod is connected with the connecting rod, the other end is connected with the tension sleeve, the connecting rod and the pull rod are arranged in the connecting hole, and the connecting rod and the pull rod are slidably connected with the mandrel through the connecting hole.

[0013] By adopting the technical scheme, the oil cylinder drives the connecting rod and the pull rod to move, so that the tension sleeve approaches or moves away from the mandrel, and the clamping or loosening of the hollow shaft is realized.

[0014] Preferably, the limiting assembly comprises a limiting spring, one end of the limiting spring is connected with the connecting rod, and the other end is connected with the air detection valve core; when the hollow shaft is not clamped in place, the limiting spring pushes the air detection valve core, so that the air detection ring on the air detection valve core is in communication with the atmosphere ring.

[0015] By adopting the technical scheme, the limit spring pushes the gas detection valve core, so that the gas detection valve core is kept in the position where the gas detection ring is communicated with the atmosphere ring when the gas detection valve core is not pushed by the hollow shaft, thereby making the pressure in the gas detection ring less than the preset value.

[0016] Preferably, a limit block is arranged on the side of the gas detection valve core close to the limit spring, a limit slot is formed in the connecting plate and communicated with the mounting hole, and the limit block is clamped with the limit slot.

[0017] By adopting the technical scheme, the limit block and the limit slot limit the gas detection valve core, so that the gas detection valve core is kept in the position where the gas detection ring is communicated with the atmosphere ring when the gas detection valve core is not pushed by the hollow shaft, thereby reminding the staff that the hollow shaft is not clamped in place, thereby reducing the occurrence of machine collision accidents.

[0018] Preferably, a first limit hole is formed in the gas detection valve core, and an end of the limit spring close to the gas detection valve core is inserted into the first limit hole.

[0019] By adopting the technical scheme, the first limit hole limits the limit spring, thereby reducing the bending and knotting of the limit spring in the extension and contraction process, and further improving the limiting effect of the limit spring on the gas detection valve core.

[0020] Preferably, a second limit hole is formed in the connecting rod, and an end of the limit spring close to the connecting rod is inserted into the second limit hole.

[0021] By adopting the technical scheme, the second limit hole limits the limit spring, thereby further reducing the bending and knotting of the limit spring in the extension and contraction process, and further improving the limiting effect of the limit spring on the gas detection valve core.

[0022] Preferably, an installation slot is formed in the gas detection valve core, a sealing ring is arranged in the installation slot, and the side of the sealing ring away from the gas detection valve core abuts against the connecting plate.

[0023] By adopting the technical scheme, the sealing ring is arranged, thereby reducing the air leakage of the gas detection ring, and improving the detection sensitivity when the hollow shaft is clamped in place.

[0024] In summary, the present application has the following beneficial technical effects:

[0025] When the hollow shaft is clamped in place, the hollow shaft pushes the gas detection valve core to move, so that the gas detection ring on the gas detection valve core is staggered with the atmosphere ring, thereby making the pressure in the gas detection ring rise to a preset value; when the hollow shaft is not clamped in place, the gas detection ring on the gas detection valve core is communicated with the atmosphere ring, thereby making the pressure in the gas detection ring below the preset value. Whether the hollow shaft is clamped in place is judged through the gas tightness detection, thereby reducing the occurrence of machine collision accidents and improving the machining accuracy and safety of the hollow shaft. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of a clamping tool for a hollow shaft and a cross-sectional structure of the hollow shaft provided by the embodiment of the present application;

[0027] Figure 2 is Figure 1 is an enlarged schematic view of part A in FIG. 1;

[0028] Figure 3 is a schematic view of the cross-sectional structure of the gas detection ring and the atmosphere ring when the hollow shaft is clamped in place;

[0029] Figure 4 is a schematic view of the cross-sectional structure of the gas detection ring and the atmosphere ring when the hollow shaft is not clamped in place.

[0030] The reference signs are as follows: 1, mounting flange; 2, clamp; 21, connecting plate; 22, mandrel; 221, first inclined surface; 3, tensioning mechanism; 31, connecting hole; 32, driving assembly; 321, connecting rod; 322, pull rod; 33, tension sleeve; 331, second inclined surface; 4, gas tightness detection mechanism; 41, mounting hole; 42, gas detection valve core; 421, mounting groove; 422, sealing ring; 43, gas detection ring; 44, atmosphere ring; 45, limiting assembly; 451, limiting spring; 452, limiting block; 453, limiting groove; 454, first limiting hole; 455, second limiting hole; 5, hollow shaft. DETAILED DESCRIPTION

[0031] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The present application is further described in detail.

[0032] The embodiment of the present application discloses a clamping tool for a hollow shaft.

[0033] Reference Figure 1 and Figure 2 A clamping tool for a hollow shaft, comprising a mounting flange 1, a clamp 2 arranged on the mounting flange 1, a tensioning mechanism 3 connected with the clamp 2, and a gas tightness detection mechanism 4. The clamp 2 comprises a connecting plate 21 connected with the mounting flange 1 through a bolt and a mandrel 22 fixedly arranged on the side of the connecting plate 21 away from the mounting flange 1, the mandrel 22 is inserted into the inside of the hollow shaft 5, and the mandrel 22 cooperates with the tensioning mechanism 3 to clamp and fix the hollow shaft 5.

[0034] The air tightness detection mechanism 4 comprises a mounting hole 41 formed in the connecting plate 21 away from the mounting flange 1, an air detection valve core 42 in sliding connection with the mounting hole 41, an air detection ring 43 formed on the air detection valve core 42, an air tightness detection assembly in communication with the air detection ring 43, an atmospheric ring 44 formed on the inner wall of the mounting hole 41 for communicating with the atmospheric environment, and a limiting assembly 45.

[0035] Referring to Figure 1 , Figure 2 and Figure 3 When the hollow shaft 5 on the mandrel 22 is clamped in place, the hollow shaft 5 pushes the air detection ring 43 away from the atmospheric ring 44.

[0036] Referring to Figure 1 , Figure 2 and Figure 4 When the hollow shaft 5 on the mandrel 22 is not clamped in place, the limiting assembly 45 pushes the air detection ring 43 into communication with the atmospheric ring 44.

[0037] Referring to Figure 1 and Figure 2 The air tightness detection assembly comprises a gas supply system and a pressure detection device, one end of the gas supply system being in communication with the air detection ring 43 and the other end being connected with the pressure detection device.

[0038] The tensioning mechanism 3 comprises a connecting hole 31 formed on the mandrel 22, a driving assembly 32 arranged in the connecting hole 31, and a tension sleeve 33 connected with the driving assembly 32, the end of the mandrel 22 away from the connecting plate 21 is provided with a first inclined surface 221, the inside of the tension sleeve 33 is provided with a second inclined surface 331, the first inclined surface 221 and the second inclined surface 331 are arranged in parallel, and the driving assembly 32 is used to drive the tension sleeve 33 to translate along the axis of the mandrel 22.

[0039] The driving assembly 32 comprises an oil cylinder, a connecting rod 321 in transmission connection with the oil cylinder, and a pull rod 322, one end of the pull rod 322 is fixedly connected with the connecting rod 321, the other end is fixedly connected with the tension sleeve 33, the connecting rod 321 and the pull rod 322 are arranged in the connecting hole 31, and the connecting rod 321 and the pull rod 322 are in sliding connection with the mandrel 22 through the connecting hole 31.

[0040] The limiting assembly 45 comprises a limiting spring 451, one end of the limiting spring 451 is fixedly connected with the connecting rod 321, and the other end is fixedly connected with the air detection valve core 42, when the hollow shaft 5 is not clamped in place, the limiting spring 451 pushes the air detection valve core 42, so that the air detection ring 43 on the air detection valve core 42 is in communication with the atmospheric ring 44.

[0041] A limiting block 452 is fixedly arranged on the side of the air detection valve core 42 close to the limiting spring 451, a limiting groove 453 in communication with the mounting hole 41 is formed on the connecting plate 21, and the limiting block 452 is clamped with the limiting groove 453.

[0042] The first limiting hole 454 is arranged on the gas detection valve core 42, and the one end of the limiting spring 451 close to the gas detection valve core 42 is inserted into the first limiting hole 454. The second limiting hole 455 is arranged on the connecting rod 321, and the one end of the limiting spring 451 close to the connecting rod 321 is inserted into the second limiting hole 455.

[0043] The installation groove 421 is arranged on the gas detection valve core 42, and the sealing ring 422 is arranged in the installation groove 421. The side of the sealing ring 422 away from the gas detection valve core 42 abuts against the connecting plate 21.

[0044] The implementation principle of the hollow shaft clamping tool is as follows: a preset value is arranged in the pressure detection device. When the hollow shaft 5 is not clamped in place, the gas detection ring 43 is in communication with the atmosphere ring 44, and the pressure detection device detects that the pressure value in the gas detection ring 43 is lower than the preset value. When the hollow shaft 5 is clamped in place, the hollow shaft 5 pushes the gas detection valve core 42, so that the gas detection ring 43 on the gas detection valve core 42 is staggered with the atmosphere ring 44, the gas detection ring 43 abuts against the inner wall of the installation hole 41, the gas supply system sends gas into the gas detection ring 43, and the pressure detection device can detect that the pressure in the gas detection ring 43 reaches the preset value.

[0045] The above are the preferred embodiments of the present application, and are not used to limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A hollow shaft clamping tool characterized by: The utility model provides a kind of air-tightness detection mechanism and hollow shaft clamping device, including installation flange (1), clamp (2) being arranged on the installation flange (1), and tensioning mechanism (3) and air-tightness detection mechanism (4) being connected with the clamp (2);The clamp (2) includes connecting plate (21) being connected with the installation flange (1) and mandrel (22) being arranged on the connecting plate (21) side away from the installation flange (1), the mandrel (22) is inserted into hollow shaft (5) inside, the mandrel (22) is fixed with the hollow shaft (5) by cooperating with the tensioning mechanism (3), the air-tightness detection mechanism (4) includes installation hole (41) being opened in the connecting plate (21) side away from the installation flange (1), air detection valve core (42) being slidably connected with the installation hole (41), air detection ring (43) being opened in the air detection valve core (42), air-tightness detection assembly being communicated with the air detection ring (43), atmosphere ring (44) being opened in the installation hole (41) inner wall for communicating atmospheric environment and limiting assembly (45), when the hollow shaft (5) on the mandrel (22) is not clamped in place, the limiting assembly (45) pushes the air detection ring (43) and the atmosphere ring (44) is communicated, when the hollow shaft (5) on the mandrel (22) is clamped in place, the hollow shaft (5) pushes the air detection ring (43) and the atmosphere ring (44) is separated.

2. The hollow shaft clamping tool according to claim 1, wherein: The air-tightness detection assembly includes a gas supply system and a pressure detection device, one end of the gas supply system is in communication with the air detection ring (43), and the other end is connected with the pressure detection device.

3. The hollow shaft clamping tool of claim 1, wherein: The tensioning mechanism (3) includes a connecting hole (31) opened in the mandrel (22), a drive assembly (32) arranged in the connecting hole (31), and a bulge sleeve (33) connected with the drive assembly (32), one end of the mandrel (22) away from the connecting plate (21) is provided with a first inclined surface (221), the inside of the bulge sleeve (33) is provided with a second inclined surface (331), the first inclined surface (221) and the second inclined surface (331) are arranged in parallel, and the drive assembly (32) is used to drive the bulge sleeve (33) to translate along the axis of the mandrel (22).

4. The hollow shaft clamping tool according to claim 3, wherein: The drive assembly (32) includes a cylinder, a connecting rod (321) connected with the cylinder, and a pull rod (322), one end of the pull rod (322) is connected with the connecting rod (321), the other end is connected with the bulge sleeve (33), the connecting rod (321) and the pull rod (322) are arranged in the connecting hole (31), and the connecting rod (321) and the pull rod (322) are slidably connected with the mandrel (22) through the connecting hole (31).

5. A hollow shaft chucking tool according to claim 4, characterized in that: The limiting assembly (45) comprises a limiting spring (451), one end of the limiting spring (451) is connected with the connecting rod (321), and the other end is connected with the gas detection valve core (42); when the hollow shaft (5) is not clamped in place, the limiting spring (451) pushes the gas detection valve core (42), so that the gas detection ring (43) on the gas detection valve core (42) communicates with the atmosphere ring (44).

6. A hollow shaft chucking tool according to claim 5, characterized in that: The gas detection valve core (42) is provided with a limiting block (452) on the side close to the limiting spring (451), and the connecting plate (21) is provided with a limiting groove (453) communicated with the mounting hole (41); the limiting block (452) is clamped with the limiting groove (453).

7. A hollow shaft chucking tool according to claim 6, characterized in that: The gas detection valve core (42) is provided with a first limiting hole (454), and one end of the limiting spring (451) close to the gas detection valve core (42) is inserted into the first limiting hole (454).

8. The hollow shaft clamping tool of claim 7, wherein: The connecting rod (321) is provided with a second limiting hole (455), and one end of the limiting spring (451) close to the connecting rod (321) is inserted into the second limiting hole (455).

9. The hollow shaft clamping tool of claim 1 wherein: The gas detection valve core (42) is provided with a mounting groove (421), and the mounting groove (421) is provided with a sealing ring (422); one side of the sealing ring (422) away from the gas detection valve core (42) abuts against the connecting plate (21).

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