Main shaft fixing and supporting device convenient to use

Abstract

The utility model relates to a spindle fixing and supporting device convenient to use, which comprises a three-jaw chuck and an ejector pin which are arranged at two axial ends of a shaft part, a mounting sleeve is arranged at the lower end of the ejector pin, a connecting rod rotatably connected with the ejector pin is embedded in the mounting sleeve, and the connecting rod is hermetically connected with the mounting sleeve. In this way, the air pressure value in the mounting sleeve can be larger than the standard atmospheric pressure, and therefore the connecting rod is forced to drive the ejector pin to move towards the shaft part to apply enough pressing force to the shaft part. Meanwhile, a mounting groove is formed in the connecting rod, a sealing block with the vertical layer projection being of a trapezoidal structure is arranged in the mounting groove through a compression spring, at the moment, the sealing groove is formed in the end, away from the shaft part, of the connecting rod, and the structure of the sealing groove and the structure of the sealing block are restrained to be consistent; and through cooperation with the circulating hole communicated with the mounting groove, an operator can apply proper pressing force to the shaft parts without depending on experience of the operator or fine control of the position of the mounting sleeve by an electrified element in practice.

Description

Technical Field

[0001] The utility model relates to the technical field of limit fixing devices, in particular to a spindle fixing and supporting device which is convenient to use. Background Technique

[0002] The spindle refers to the shaft that receives power from an engine or a motor and transmits it to other parts. In practice, according to different application scenarios, shaft parts need to undergo a variety of unique processing processes, such as quenching, drilling, grinding, etc. During the processing of shaft parts, in order to ensure processing accuracy and safety, a corresponding clamping mechanism is generally used to fix the shaft parts.

[0003] In the existing technology devices, generally, a three-jaw chuck and a center drill are respectively arranged at both axial ends of the shaft part. The three-jaw chuck is used to clamp and restrain the shaft part to limit its position from changing, while the center drill generally needs to be in tight fit with the shaft part, and the complete restraint of the position of the shaft part is achieved through sufficient pressing force.

[0004] However, in the actual use process of the existing technology devices, in order to accurately move the center drill and ensure that the pressing force applied by the center drill on the shaft part is appropriate, which can not only ensure stable clamping but also avoid scratching the shaft part, it generally moves by means of screw transmission. In practice, an internal threaded hole is opened at the lower end of the corresponding mounting part of the center drill, and the internal threaded hole is screwed with a screw rod rotatably connected to the workbench.

[0005] At the same time, in order to ensure accuracy, a corresponding servo motor is generally arranged at the axial end of the screw rod to accurately control the number of turns of the screw rod. However, the self-use cost and maintenance cost of the servo motor are relatively high, which does not meet the actual requirements of cost reduction and efficiency improvement in the production process. Therefore, we believe that a spindle fixing and supporting device that can reduce costs and ensure that the pressing force applied by the center drill on the shaft part is appropriate is needed. Summary of the Invention

[0006] Aiming at the deficiencies in the prior art, the utility model proposes a spindle fixing and supporting device which is convenient to use, has the advantages of low cost and ensuring that the pressing force applied to the shaft part is appropriate, and solves the disadvantage of high cost of using a servo motor in the existing technology devices.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A spindle fixing support device that is easy to use comprises a three-jaw chuck and an ejector pin arranged at two axial ends of a shaft part, a driving mechanism is arranged at the lower end of the ejector pin, and the driving mechanism drives the ejector pin to perform linear motion along the central axis direction of the shaft part, the driving mechanism comprises a mounting sleeve, a connecting rod is embedded in the mounting sleeve at one end close to the shaft part, the connecting rod is rotatably connected to the ejector pin, the connecting rod is sealedly connected to the mounting sleeve, a mounting groove is provided inside the connecting rod, and a compression spring with a central axis horizontal to the central axis of the shaft part is provided in the mounting groove, one axial end of the compression spring abuts against the inner wall of the connecting rod, and a sealing block with a trapezoidal structure projected on a vertical plane is abutted against the other axial end of the compression spring, a sealing groove is penetrated through the end of the connecting rod away from the shaft part, one end of the sealing groove is communicated with the mounting groove, the other end of the sealing groove penetrates the connecting rod, and the sealing groove has the same structure as the sealing block, when the compression spring is not affected by external force, the sealing block is embedded in the sealing groove and abuts against the inner wall of the connecting rod, a flow hole is penetrated through the connecting rod, and the flow hole is communicated with the mounting groove.

[0009] Preferably, the connecting rod includes a sealing section and a connecting section, wherein the connecting section is rotatably connected to the ejector pin, a sealing ring is sleeved on the outer side of the sealing section, and the sealing ring is embedded in the mounting sleeve and is sealingly and slidably connected to the mounting sleeve, the projection of the sealing section on the vertical plane completely covers the projection of the connecting section on the vertical plane, and the width and height of the sealing section are greater than the width and height of the connecting section.

[0010] Preferably, one end of the connecting section of the connecting rod close to the shaft part is fixedly connected to the mounting rod through a connecting piece, and the upper end of the mounting rod is rotatably connected to the ejector pin through a bearing.

[0011] Preferably, an internal threaded hole is formed through one end of the mounting sleeve away from the shaft part, a screw is threaded in the internal threaded hole, a support seat is provided on the lower side of the mounting sleeve, a mounting hole is formed through the support seat, and the screw is inserted into the mounting hole.

[0012] Preferably, the lower end of the mounting sleeve is provided with two internal threaded holes which are threadedly connected to screw rods, and the two screw rods are rotatably connected to the support seat, each axial end of the screw rod is keyed to a transmission gear, and the two transmission gears are meshed and transmission-connected.

[0013] Preferably, there are a plurality of flow holes, a plurality of flow holes are provided in a rectangular array on the connecting rod, and an inner diameter of each flow hole is not greater than five millimeters.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the present utility model, the installation sleeve and the connecting rod are hermetically matched, so that the air pressure value inside the installation sleeve can be greater than the standard atmospheric pressure, thereby applying a force to the connecting rod away from the installation sleeve. This enables the connecting rod to drive the thimble to apply sufficient pressing force to the shaft parts. At the same time, the presence of the compression spring and the sealing block also limits the maximum air pressure value inside the installation sleeve. When the air pressure value inside the installation sleeve continues to rise, the vent hole can be used to relieve the pressure to the preset air pressure value. This enables the operator in practice to apply appropriate pressing force to the shaft parts without relying on their own experience or fine control of the electrified components to control the position of the installation sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0017] Figure 2 It is a schematic diagram of the connection between the driving mechanism and the thimble of the present utility model.

[0018] Figure 3 It is a schematic diagram of the cooperation between the installation rod and the connecting rod of the present utility model.

[0019] Figure 4 It is a schematic diagram of the internal structure of the connecting rod of the present utility model.

[0020] Figure 5 It is a schematic diagram of the connection between the support seat and the screw of the present utility model.

[0021] In the figure: 1, three-jaw chuck; 2, shaft parts; 3, driving mechanism; 301, installation rod; 302, connecting piece; 303, connecting rod; 304, installation sleeve; 305, screw; 306, support seat; 307, transmission gear; 308, sealing ring; 309, sealing block; 310, sealing groove; 311, compression spring; 312, installation groove; 313, vent hole; 314, bearing; 4, thimble. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] Please refer to Figures 1-5 , a spindle fixing and supporting device that is easy to use. Consistent with the prior art device, a three-jaw chuck 1 and a center drill 4 are respectively arranged at both ends of the shaft part 2 in this device. This can utilize the center drill 4 to assist the three-jaw chuck 1 to complete the process of supporting and limiting the spindle.

[0025] Different from the prior art device, a driving mechanism 3 is arranged at the lower end of the center drill 4 in this device to change the position of the center drill 4, so that the position of the center drill 4 can cooperate with the three-jaw chuck 1 to clamp and fix the shaft part 2.

[0026] Specifically, the driving mechanism 3 of this device includes an installation sleeve 304. A connecting rod 303 is embedded in the installation sleeve 304. The connecting rod 303 is rotatably connected to the center drill 4. Therefore, the relative distance between the center drill 4 and the three-jaw chuck 1 can be changed by moving the connecting rod 303.

[0027] At the same time, a sealing ring 308 is sleeved outside the end of the connecting rod 303 away from the shaft part 2 in this device. The sealing connection between the connecting rod 303 and the installation sleeve 304 is realized through the sealing ring 308. Then, when the installation sleeve 304 is moved, the connecting rod 303 can be moved synchronously by using air pressure.

[0028] It should be noted that in practice, the center drill 4 abuts against the shaft part 2, and a relatively large pressing force needs to be applied by the center drill 4 to the shaft part 2 to fix the shaft part 2. Therefore, it can be foreseen that in the actual use process, the air pressure value in the inner cavity of the installation sleeve 304 and in the closed space formed by the inner wall of the installation sleeve 304 and the connecting rod 303 must be greater than the atmospheric pressure.

[0029] Therefore, in order to prevent the air pressure value in the inner cavity of the installation sleeve 304 from being too large, resulting in too large a pressing force applied by the center drill 4 to the shaft part 2 and causing damage to the shaft part 2, an installation groove 312 is opened at the end of the connecting rod 303 away from the shaft part 2, that is, at the end of the connecting rod 303 located in the inner cavity of the installation sleeve 304, and a compression spring 311 with a central axis horizontal to the central axis of the shaft part 2 is arranged in the installation groove 312.

[0030] Meanwhile, one axial end of the compression spring 311 abuts against the inner wall of the connecting rod 303, and a sealing block 309 with a trapezoidal structure in the vertical plane projection is provided at the other axial end of the compression spring 311, which makes the sealing block 309 tend to move away from the shaft-like part 2.

[0031] At this time, in cooperation with the installation groove 312 opened at one end of the connecting rod 303 away from the shaft-like part 2, by restricting the communication between the end of the sealing groove 310 close to the shaft-like part 2 and the installation groove 312, the end of the sealing groove 310 away from the shaft-like part 2 penetrates through the connecting rod 303, and the sealing groove 310 has the same structure as the sealing block 309, so that when the sealing block 309 moves away from the shaft-like part 2 under the action of the compression spring 311, the sealing block 309 can be embedded into the sealing groove 310 and abut against the inner wall of the connecting rod 303 to complete the sealing of the sealing groove 310. When the air pressure value in the inner cavity of the installation sleeve 304 continues to rise and exerts a large thrust on the sealing block 309, forcing the compression spring 311 to be compressed, the gas accumulated inside the installation sleeve 304 can be discharged into the outside through the communication hole 313 opened on the connecting rod 303 and communicating with the installation groove 312.

[0032] It should be emphasized that, as Figure 4 shown, the length, width, and height of the end of the sealing block 309 away from the shaft-like part 2 are all smaller than the length, width, and height of the end of the sealing block 309 close to the shaft-like part 2. This can force the sealing block 309 to move towards the sealing groove 310 to abut against the inner wall of the connecting rod 303 when the compression spring 311 releases its elastic potential energy.

[0033] It should be noted that, as Figure 4 shown, since the end of the sealing groove 310 close to the shaft-like part 2 and the installation groove 312 have a smooth transition, in order to ensure that the installation sleeve 304 can flow to the outside through the communication hole 313 when the sealing block 309 moves towards the shaft-like part 2, the length, width, and height of the end of the sealing block 309 close to the shaft-like part 2 are all restricted to be smaller than the length, width, and height of the installation groove 312. This makes the side of the sealing block 309 fit with the sealing groove 310 and the side of the sealing block 309 abut against the inner wall of the connecting rod 303 when the sealing block 309 moves towards the sealing groove 310.

[0034] Furthermore, in order to prevent external impurities from entering the installation groove 312 through the communication hole 313 and hindering the movement of the sealing block 309, the number of the communication holes 313 is restricted to be multiple, and the multiple communication holes 313 are arranged in a rectangular array on the connecting rod 303 to ensure that the gas flow rate meets the requirements, so that the inner diameter of each communication hole 313 is not greater than five millimeters to prevent external debris from entering.

[0035] Further, in order to reduce the frictional loss generated during the relative movement of the connecting rod 303 in the mounting sleeve 304, the connecting rod 303 of this device is divided into a two-section structure with different sizes. Among them, the section sleeved with the sealing ring 308 inside and outside the mounting sleeve 304 is the sealing section, and the connecting section for rotatably connecting with the thimble 4. By restricting the projection of the sealing section on the vertical plane to completely cover the projection of the connecting section on the vertical plane, and the width and height of the sealing section being greater than the width and height of the connecting section, it can be ensured that the connecting section does not contact the inner wall of the mounting sleeve 304 in practice, thereby reducing the frictional loss.

[0036] Further, for the convenience of actual processing and to ensure that the heights of both the mounting sleeve 304 and the thimble 4 can meet the actual usage requirements, an installation rod 301 is fixedly connected to one end of the connecting section of the connecting rod 303 close to the shaft-like part 2 through a connecting piece 302. By changing the heights of the connecting piece 302 and the installation rod 301, the distance between the thimble 4 and the mounting sleeve 304 can be adjusted. Therefore, the upper end of the installation rod 301 is rotatably connected to the thimble 4 through a bearing 314.

[0037] Specifically, in order to conveniently and stably change the horizontal position of the mounting sleeve 304 during actual processing, an internal threaded hole is drilled through one end of the mounting sleeve 304 away from the shaft-like part 2, and a screw 305 is screwed into the internal threaded hole. Therefore, on the premise that the rotation of the mounting sleeve 304 around the central axis of the screw 305 is restricted, the horizontal position of the mounting sleeve 304 can be changed by rotating the screw 305. This method can also be used to fix the height of the mounting sleeve 304 by using the screw 305.

[0038] It should be noted that a support seat 306 is provided on the lower side of the mounting sleeve 304. An installation hole is drilled through the support seat 306, and the screw 305 is inserted into the installation hole to support and limit the fixing of the screw 305 by using the support seat 306.

[0039] Further, two internal threaded holes are drilled through the lower end of the mounting sleeve 304 in parallel, and the screw 305 is screwed into both internal threaded holes. Moreover, both screws 305 are rotatably connected to the support seat 306. This method can use the mutual restraint of the two screws 305 to fully ensure that the mounting sleeve 304 cannot rotate around a single screw 305.

[0040] Further, a transmission gear 307 is key-connected to the axial ends of both screws 305. By restricting the meshing transmission connection of the two transmission gears 307, it can be ensured that the two screws 305 always move synchronously, which can further ensure the smooth movement of the mounting sleeve 304.

[0041] It should be noted that as Figure 5As shown in the figure, a driving motor is key-connected to one side of one of the screws 305 of the present device, and the driving motor is used as the power source for the rotation of the screw 305. However, in practice, the power source should not be limited to the driving motor, and the operator can flexibly select according to the on-site environment.

[0042] It should be emphasized that the present device uses the support base 306 to support the screw 305, that is, the installation sleeve 304. The support base 306 can be analogously regarded as a workbench in practice. The support base 306 is only a structure established for the convenience of illustration and display of the present device, and its form is not unified.

[0043] In the actual use process of the present utility model:

[0044] First, the operator resets the three-jaw chuck 1 and inserts the shaft-like part 2 between the three positioning claws of the three-jaw chuck 1. At this time, the three-jaw chuck 1 is opened to achieve unilateral positioning of the shaft-like part 2.

[0045] Then, the operator rotates the screw 305 using a relevant power source, driving the installation sleeve 304 to move towards the shaft-like part 2. At this time, the ejector pin 4 does not contact the shaft-like part 2, and the ejector pin 4 follows the installation sleeve 304 to move towards the shaft-like part 2.

[0046] After that, the distance between the ejector pin 4 and the shaft-like part 2 continuously decreases until the ejector pin 4 abuts against the shaft-like part 2. At this time, the screw 305 continues to rotate, the internal pressure value of the installation sleeve 304 increases, and the pressing force exerted by the ejector pin 4 on the shaft-like part 2 increases.

[0047] Then, the thrust exerted by the internal pressure value of the installation sleeve 304 on the sealing block 309 is greater than the elastic force exerted by the compression spring 311 on the sealing block 309. The sealing block 309 moves towards the shaft-like part 2, and the sealing block 309 releases the abutting state with the inner wall of the connecting rod 303. At this time, the gas inside the installation sleeve 304 is depressurized to the outside through the flow hole 313.

[0048] Finally, when the screw 305 stops rotating and the internal air pressure value of the installation sleeve 304 drops to the critical state (the thrust exerted by the internal pressure value of the installation sleeve 304 on the sealing block 309 is less than the elastic force exerted by the compression spring 311 on the sealing block 309), the sealing block 309 moves in the direction away from the shaft-like part 2, and the sealing block 309 abuts against the inner wall of the connecting rod 303.

[0049] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A spindle fixing support device that is easy to use, characterized in that: It comprises a three-jaw chuck (1) and an ejector pin (4) arranged at two axial ends of a shaft-like part (2); a driving mechanism (3) is arranged at the lower end of the ejector pin (4); and the driving mechanism (3) drives the ejector pin (4) to perform linear motion along the central axis direction of the shaft-like part (2); The driving mechanism (3) comprises a mounting sleeve (304), wherein a connecting rod (303) is embedded in one end of the mounting sleeve (304) close to the shaft part (2), and the connecting rod (303) is rotatably connected to the ejector pin (4); The connecting rod (303) is sealedly connected to the mounting sleeve (304), a mounting groove (312) is provided inside the connecting rod (303), and a compression spring (311) whose central axis is parallel to the central axis of the shaft part (2) is provided in the mounting groove (312), one axial end of the compression spring (311) is in contact with the inner wall of the connecting rod (303), and the other axial end of the compression spring (311) is in contact with a sealing block (309) having a trapezoidal structure in vertical plane projection; A sealing groove (310) is formed through one end of the connecting rod (303) away from the shaft-like part (2); one end of the sealing groove (310) is connected to the mounting groove (312); the other end of the sealing groove (310) passes through the connecting rod (303); and the sealing groove (310) and the sealing block (309) have the same structure. When the compression spring (311) is not affected by external force, the sealing block (309) is embedded in the sealing groove (310) and abuts against the inner wall of the connecting rod (303); The connecting rod (303) is provided with a circulation hole (313) which is communicated with the installation groove (312).

2. A spindle fixing support device that is easy to use according to claim 1, characterized in that: The connecting rod (303) comprises a sealing section and a connecting section, wherein the connecting section is rotatably connected to the ejector pin (4), a sealing ring (308) is sleeved on the outer side of the sealing section, and the sealing ring (308) is embedded in the mounting sleeve (304) and is sealingly and slidably connected to the mounting sleeve (304); The projection of the sealing section on the vertical plane completely covers the projection of the connecting section on the vertical plane, and the width and height of the sealing section are greater than the width and height of the connecting section.

3. A spindle fixing and supporting device convenient to use according to claim 2, characterized in that: The connecting section of the connecting rod (303) is fixedly connected to the mounting rod (301) at one end close to the shaft part (2) through a connecting piece (302), and the upper end of the mounting rod (301) is rotatably connected to the ejector pin (4) through a bearing (314).

4. A spindle fixing and supporting device convenient to use according to claim 1, characterized in that: An internal threaded hole is formed through one end of the installation sleeve (304) away from the shaft-like part (2), and a screw rod (305) is threadedly connected in the internal threaded hole; A support seat (306) is provided at the lower side of the installation sleeve (304), and a mounting hole is provided through the support seat (306), and a screw rod (305) is inserted into the mounting hole.

5. A spindle fixing and supporting device convenient to use according to claim 4, characterized in that: The lower end of the installation sleeve (304) is provided with two internal threaded holes which are arranged in parallel and penetrated therethrough. The two internal threaded holes are both threadedly connected to the screw rods (305), and the two screw rods (305) are rotatably connected to the support seat (306); Each axial end of the screw rod (305) is key-connected with a transmission gear (307), and the two transmission gears (307) are meshed and transmission-connected.

6. The spindle fixing and supporting device convenient to use according to claim 1, characterized in that: There are a plurality of the circulation holes (313), which are arranged in a rectangular array on the connecting rod (303), and an inner diameter of each circulation hole (313) is no greater than five millimeters.

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