CN210174120U

CN210174120U - Ball-removing screw rod thread mechanism

Info

Publication number: CN210174120U
Application number: CN201921019256.1U
Authority: CN
Inventors: Zhenyu Lu; 卢震宇; Zhiwei Chen; 陈志伟; Qiulei Wang; 王秋雷; Qianfang Zhuang; 庄千芳; Yuefei Zhang; 张跃飞; Zhangtian Zhou; 周章添
Original assignee: Yonggao Co Ltd
Current assignee: Era Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-03-24
Anticipated expiration: 2029-06-29

Abstract

The utility model provides a take off ball lead screw thread mechanism belongs to mould technical field. The technical problem that the existing thread-removing mechanism gear structure is prone to deformation when continuously subjected to axial unbalance loading is solved. This take off ball lead screw thread mechanism include the fixing base and link firmly in lead screw on the fixing base, sliding connection has the ability to follow on this fixing base lead screw reciprocating motion's core slider, the outer peripheral face spiro union cooperation of lead screw has the sleeve, the sleeve is located just can drive this core slider reciprocating sliding in the core slider, the spacing cover of telescopic outer peripheral face circumference is equipped with and is used for controlling the rotatory drive gear of sleeve, telescopic endwise slip can be followed to drive gear. The utility model provides a drive gear's side does not bear load hardly to guarantee life.

Description

Ball-removing screw rod thread mechanism

Technical Field

The utility model belongs to the technical field of the mould, a take off ball lead screw thread mechanism is related to.

Background

The plastic product with the threads is widely applied in daily life and production, the plastic product with the threads which has low precision requirement is generally subjected to injection molding by adopting a mold with a forced demoulding mechanism, and the plastic product with the threads which has higher precision is generally subjected to injection molding by adopting the mold with the forced demoulding mechanism.

The applicant previously applied for a high-precision synchronous thread-removing mechanism of a die with the authorization publication number of CN208232241U, which comprises a fixed seat, a spindle, a driving gear, a first driven gear, a sliding seat and a threaded core, wherein the fixed seat is fixedly connected with a screw rod parallel to the threaded core, the outer peripheral surface of the screw rod is in threaded connection with a second driven gear, one side, facing the fixed seat, of the second driven gear is abutted against the sliding seat, the spindle is parallel to the screw rod, the driving gear is in sliding fit with the spindle along the axial direction, one side, away from the fixed seat, of the driving gear is abutted against the sliding seat, and the driving.

The mechanism is driven by the same power, the transmission process is ensured to be continuous, the effect of necessary synchronization of rotation and translation withdrawing is realized, and the improvement is still needed: in the working process, the driven gear II bears larger load, the gear structure has high precision requirement and is easy to deform under the action of axial unbalance load, and the service life is influenced.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a take off ball lead screw thread mechanism, the utility model aims to solve the technical problem that: how to extend the service life of the mechanism.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a take off ball lead screw thread mechanism, include the fixing base and link firmly in lead screw on the fixing base, sliding connection has on this fixing base can follow lead screw reciprocating motion's core slider, a serial communication port, the outer peripheral face spiro union cooperation of lead screw has the sleeve, the sleeve is located just can drive this core slider reciprocating sliding in the core slider, the spacing cover of telescopic outer peripheral face circumference is equipped with the drive gear that is used for controlling sleeve rotation, telescopic endwise slip can be followed to drive gear.

The screw rod is fixedly connected to the fixed seat, the core sliding block is connected with the fixed seat in a sliding mode, and therefore when the core on the core sliding block rotates to remove threads, the core sliding block can slowly retreat along the screw rod and is matched with the thread removing stroke speed, and high-precision thread removing is achieved. The sleeve used for pushing the core slider to move is sleeved with the outer peripheral face of the screw rod in a screwing mode, the driving gear which is circumferentially limited and can axially slide relative to the sleeve is sleeved on the outer peripheral face of the sleeve, the sleeve can be driven to rotate and move along the screw rod when the driving gear is stressed to rotate, the core slider is pushed to achieve reciprocating motion, in addition, the driving gear and the sleeve are arranged in a split mode, the end face of the sleeve is stressed in the reciprocating motion process, the side face of the driving gear almost does not bear load, the gear is prevented from deforming and affecting transmission, and the service life of the thread removing mechanism is prolonged.

In the ball screw thread removing mechanism, the core sliding block is embedded with the plane bearings which are coaxially arranged with the sleeve, and the plane bearings are respectively abutted against two ends of the sleeve. Through all leaning on at telescopic both ends and setting up the plane bearing, reduce the sleeve like this and lean on the wearing and tearing between the rotatory in-process and the core slider, increase of service life.

In the ball screw thread removing mechanism, a flange is arranged on the end face of one end, facing the thread cavity, of the sleeve, and the side face of the flange can be attached and covered on the side face corresponding to the plane bearing. The flange plate which can be used for attaching and covering the end face of the plane bearing is arranged at one end, facing the thread cavity, of the sleeve, so that the contact area of the sleeve and the side plane bearing is increased, the damage to the plane bearing is not easily caused even if the core sliding block is reset with a fast speed load, and the service life is prolonged.

In the above ball screw thread removing mechanism, the core slider is provided with a limit groove matched with the driving gear, and two side surfaces of the driving gear are in clearance fit with two side walls of the limit groove. The limiting grooves with the two side walls in clearance fit with the two side surfaces of the driving gear are arranged in the core sliding block, so that the movement range of the driving gear is effectively limited, and the meshing effect of the driving gear and the power mechanism is ensured.

In the ball screw thread removing mechanism, the core sliding block is internally provided with a step groove matched with the flange plate, and the side surface of the flange plate is attached to the side surface of the plane bearing and has a reserved gap with the bottom surface of the step groove. Through set up in the core slider with flange dish matched with step groove makes and has the clearance of reserving between the side of flange dish and the bottom surface in step groove, like this when the flange dish produce too big effort and can receive the limiting displacement of the bottom surface in step groove when compressing planar bearing when the core slider resets, guarantees that planar bearing can not crushed by the pressure, increase of service life.

Compared with the prior art, the utility model has the advantages as follows:

1. this take off ball lead screw thread mechanism establishes the sleeve that is used for promoting the motion of core slider through the outer peripheral face spiro union cover at the lead screw, and establish circumference spacing and can sleeve relatively along axially sliding's drive gear at telescopic outer peripheral face cover, can drive the sleeve rotation and follow the lead screw motion when the drive gear atress rotates like this, promote the core slider and realize reciprocating motion, furthermore, drive gear sets up with the sleeve components of a whole that can function independently, by telescopic terminal surface atress at reciprocating motion in-process, and drive gear's side does not bear the load hardly, thereby avoid the gear to appear warping and influence the transmission, improve the life who takes off thread mechanism.

2. This take off ball lead screw thread mechanism sets up the ring flange that can cover the terminal surface laminating of plane bearing through the sleeve towards the one end of screw thread die cavity, has increased the area of contact of sleeve with this side plane bearing like this, even the core slider is difficult for causing plane bearing's damage when reseing with very fast speed load like this, increase of service life.

Drawings

Fig. 1 is a schematic structural view of the present ball screw thread removing mechanism.

Fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure, 1, a fixed seat; 2. a screw rod;

3. a core slider; 31. a limiting groove; 32. a step groove;

4. a sleeve; 41. a flange plate;

5. a drive gear; 6. a flat bearing; 7. and reserving a gap.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the ball screw thread removing mechanism comprises a fixing seat 1 and a screw rod 2 fixedly connected to the fixing seat 1, two core sliders 3 which are arranged just opposite to each other and can reciprocate along the screw rod 2 are connected to the fixing seat 1 in a sliding mode, a sleeve 4 is matched with the outer peripheral face of the screw rod 2 in a threaded mode, the sleeve 4 is located in the core sliders 3 and can drive the core sliders 3 to slide in a reciprocating mode, a driving gear 5 used for controlling the rotation of the sleeve 4 is sleeved on the outer peripheral face of the sleeve 4 in a circumferential limiting mode, and the driving gear 5 can slide along the axial direction of the. The lead screw 2 is fixedly connected to the fixing seat 1, the core sliding block 3 is in sliding connection with the fixing seat 1, and therefore the core sliding block 3 can slowly retreat along the lead screw 2 and is matched with the thread-off stroke speed when a core on the core sliding block 3 rotates to thread off, and high-precision thread off is achieved. Through the sleeve 4 that is used for promoting the motion of core slider 3 of outer peripheral face spiro union cover at lead screw 2, and establish circumference spacing and can be relative sleeve 4 along the gliding drive gear 5 of axial at the outer peripheral face cover of sleeve 4, can drive sleeve 4 rotatory and along lead screw 2 motion when drive gear 5 atress rotates like this, promote core slider 3 and realize reciprocating motion, in addition, drive gear 5 sets up with sleeve 4 components of a whole that can function independently, by sleeve 4's terminal surface atress at the reciprocating motion in-process, and drive gear 5's side does not bear the load hardly, thereby avoid the gear to appear warping and influence the transmission, improve the life who takes off thread mechanism. Further, a plane bearing 6 coaxially arranged with the sleeve 4 is embedded in the core slider 3, and the plane bearings 6 are respectively abutted to two ends of the sleeve 4. Through all leaning on at the both ends of sleeve 4 and setting up flat bearing 6, reduce sleeve 4 like this and lean on the wearing and tearing between the rotatory in-process and the core slider 3, increase of service life. The end surface of the sleeve 4 facing the thread cavity is provided with a flange 41, and the side surface of the flange 41 can be jointed and covered with the side surface of the corresponding plane bearing 6. The flange plate 41 which can be used for attaching and covering the end face of the plane bearing 6 is arranged at one end, facing the thread cavity, of the sleeve 4, so that the contact area between the sleeve 4 and the side plane bearing 6 is increased, the plane bearing 6 is not easily damaged even if the core sliding block 3 is reset at a high speed under load, and the service life is prolonged. The core slide block 3 is internally provided with a limiting groove 31 matched with the driving gear 5, and two side surfaces of the driving gear 5 are in clearance fit with two side walls of the limiting groove 31. The limiting grooves 31 with two side walls in clearance fit with the two side surfaces of the driving gear 5 are arranged in the core sliding block 3, so that the movement range of the driving gear 5 is effectively limited, and the meshing effect of the driving gear 5 and the power mechanism is ensured. The core slider 3 is internally provided with a step groove 32 matched with the flange 41, and the side surface of the flange 41 is jointed with the side surface of the plane bearing 6 and is provided with a reserved gap 7 with the bottom surface of the step groove 32. Through the arrangement of the step groove 32 matched with the flange plate 41 in the core slider 3, a reserved gap 7 is formed between the side surface of the flange plate 41 and the bottom surface of the step groove 32, so that when the flange plate 41 generates overlarge acting force between the core slider 3 and the plane bearing 6 when the core slider is reset and compresses the plane bearing 6, the limit effect of the bottom surface of the step groove 32 can be realized, the plane bearing 6 is prevented from being crushed, and the service life is prolonged.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a take off ball lead screw thread mechanism, include fixing base (1) and link firmly in lead screw (2) on fixing base (1), sliding connection has the ability to follow on this fixing base (1) lead screw (2) reciprocating motion's core slider (3), its characterized in that, the outer peripheral face spiro union cooperation of lead screw (2) has sleeve (4), sleeve (4) are located just can drive this core slider (3) reciprocating sliding in core slider (3), the spacing cover of outer peripheral face circumference of sleeve (4) is equipped with drive gear (5) that are used for controlling sleeve (4) rotation, the endwise slip of sleeve (4) can be followed in drive gear (5).

2. Screw thread mechanism according to claim 1, characterised in that a plane bearing (6) is embedded in the core slider (3) and arranged coaxially with the sleeve (4), the plane bearings (6) being arranged against the two ends of the sleeve (4), respectively.

3. Screw thread mechanism according to claim 2, wherein the sleeve (4) has a flange (41) at its end facing the thread cavity, the flange (41) having a side surface for abutting against and covering a side surface of the flat bearing (6).

4. The ball screw thread mechanism that takes off of claim 1, characterized in that, have in the core slider (3) with the drive gear (5) matched with spacing groove (31), the both sides face of drive gear (5) with the both sides wall clearance fit of spacing groove (31).

5. The ball screw thread removing mechanism according to claim 3, wherein the core slider (3) is internally provided with a step groove (32) matched with the flange plate (41), and the side surface of the flange plate (41) is attached to the side surface of the plane bearing (6) and is provided with a reserved gap (7) with the bottom surface of the step groove (32).