CN213225694U

CN213225694U - Pressing adjusting assembly of transition gear and back pressure steel roller lifting mechanism

Info

Publication number: CN213225694U
Application number: CN202021858854.0U
Authority: CN
Inventors: 谢昌剑
Original assignee: Shenzhen Ju Yong Neng Technology Co ltd
Current assignee: Shenzhen Ju Yong Neng Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-18
Anticipated expiration: 2030-08-31

Abstract

The utility model discloses a transition gear compress tightly adjusting part and backpressure steel roller lifting mechanism for exert the elasticity that can change on the transition gear train between steel roller gear and the driving gear, so that steel roller gear accessible transition gear train keeps the meshing relation with the driving gear. Specifically, this compress tightly adjusting part includes spring and locating lever, and the spring housing is established on the locating lever, and the one end of spring is connected on the transition gear train. The positioning rod is provided with a movable block which can move along the axial direction of the positioning rod, and the other end of the spring is abutted against the movable block.

Description

Pressing adjusting assembly of transition gear and back pressure steel roller lifting mechanism

Technical Field

The utility model relates to a technical field of scrubbing machine steel rumble lifting mechanism, in particular to transition gear compress tightly adjusting part and backpressure steel roller lifting mechanism.

Background

The plate grinding machine is one of necessary production equipment in the manufacturing process of the printed circuit board, and is used for grinding and polishing the metal layer on the surface of the printed circuit board so as to remove dirt on the surface of the printed circuit board and enable the metal layer to be flat and capable of being used as a photoresist.

The thickness of the printed circuit board is different according to the use of the printed circuit board, so that the plate grinding machine needs to adjust the distance between the backpressure steel roller and the grinding brush according to the thickness of the printed circuit board. The plate grinding machine is internally provided with a lifting mechanism which is specially used for adjusting the distance between the backpressure steel roller and the grinding brush, the lifting mechanism mainly comprises a speed reducer and crossed ball guide rail assemblies, the end part of the backpressure steel roller is arranged between the two crossed ball guide rail assemblies in a sliding way and is driven up and down by a lifter; meanwhile, the end part of the backpressure steel roller is provided with a steel roller gear, the steel roller gear is in transmission connection with a driving gear with a fixed position through a transition gear set, and a compression spring is arranged on the outer side of the transition gear set and used for enabling the steel roller gear to be always in a meshing transmission state with the steel roller gear when the steel roller is lifted along with the backpressure steel roller so as to be capable of being driven by the driving gear to rotate to transfer the printed circuit board in the lifting process of the backpressure steel roller.

However, the elasticity that present pressure spring can provide reaches the limit very easily, so will lead to pressure spring's toughness to reduce for a long time to lead to the condition that transition gear train appears beating in backpressure steel roller lift in-process, and then lead to driving gear and the unable effective meshing of steel roller gear.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model aims at providing a transition gear compresses tightly adjusting part for exert the elasticity that can change on the transition gear train between steel roller gear and the driving gear, so that steel roller gear accessible transition gear train keeps the meshing relation with the driving gear.

In order to achieve the above object, the utility model provides a transition gear's adjustment assembly that compresses tightly, including spring and locating lever, the spring housing is established on the locating lever, the one end of spring is connected on the transition gear train. The positioning rod is provided with a movable block capable of moving along the axial direction of the positioning rod, and the other end of the spring abuts against the movable block.

Optionally, the positioning rod is sleeved with a fixed block, and the fixed block is rotatably sleeved in a fixed seat.

Optionally, the positioning rod has a threaded portion, and the moving block is sleeved on the threaded portion and is in threaded fit with the threaded portion.

Optionally, the moving block is a nut.

Optionally, the axis of the spring is perpendicular to the contact surface where the spring and the transition gear set abut.

The utility model also provides a backpressure steel roller lifting mechanism, including steel roller gear, driving gear and transition gear group, steel roller gear with pass through between the driving gear the transmission of transition gear group meshing. The compression adjusting assembly is pressed on the transition gear set, variable elastic force is applied to the transition gear set between the steel roller gear and the driving gear, and therefore the steel roller gear can be kept in a meshed relationship with the driving gear through the transition gear set.

The utility model discloses a set up a locating lever on the basis of spring to set up a mobilizable movable block at the locating lever, establish the spring housing on the locating lever, make the one end of spring connect on the transition gear train, other end butt is on the movable block. From this, just can adjust the free length of spring (the length of spring under the steel roller gear does not exert external force state to the spring) through removing the movable block for the spring can exert sufficient elasticity to the transition gear train all the time, so that the transition gear train can all the time with the steel roller gear meshing on the backpressure steel roller at backpressure steel roller lift in-process, and then make the driving gear can effectively drive the rotation of backpressure steel roller in lift in-process.

And, because can adjust the free length of spring, consequently can lengthen original spring length, the rethread movable block with the length adjustment of spring in suitable scope. The long spring can provide wider elasticity scope and stronger elasticity, effectively reduces the condition that the spring is contracted or stretched to the limit, and life is longer, and operating condition is more stable, can avoid leading to the problem that transition gear train beats because of the reduction of spring toughness.

Drawings

FIG. 1 is a schematic structural diagram of a back pressure steel roller lifting mechanism;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawing 1, the embodiment of the present invention provides a back pressure steel roller lifting mechanism, which includes a speed reducer 1, a back pressure steel roller, two crossed ball guide rail assemblies 2, a transition gear set 4, a driving gear 5 and a pressing adjustment assembly 6.

A lifting plate 21 is arranged between the sliding parts of the two crossed ball guide rail assemblies 2, the end part of the backpressure steel roller penetrates through the lifting plate 21, and the part penetrating through the lifting plate 21 is sleeved with a steel roller gear 3.

The speed reducer 1 includes a lifting ball screw 12 and a transmission shaft 11, and the transmission shaft 11 is connected to a servo motor, not shown, in a transmission manner. The lifting ball screw 12 is provided with a lifting seat 12a, and the lifting plate 21 is fixedly connected with the lifting seat 12 a. The transition gear set 4 includes a swing arm 43, the swing arm 43 is provided with a first transition gear 41 and a second transition gear 42 engaged with each other, and the first transition gear 41 is disposed on the peripheral side of the driving gear 5 and engaged with the driving gear 5. The second transition gear 42 is engaged with the steel roll gear 3.

The pressing adjusting assembly 6 comprises a spring 61 and a positioning rod 62, a fixed block 63 is sleeved on the upper end of the positioning rod 62, and the fixed block 63 is rotatably sleeved in a fixed seat fixed on the plate grinding machine. The body of the spring 61 is fitted over the positioning rod 62, and one end thereof is connected to the swing arm 43. The positioning rod 62 is provided with a movable block 64 movable in the axial direction thereof, and the other end of the spring 61 abuts against the movable block 64.

Under normal conditions, the driving gear 5 rotates under the drive mechanism of the board grinding machine, and drives the steel roller gear 3 to rotate through the transition gear set 4 so as to drive the backpressure steel roller to rotate and forward transmit the printed circuit board between the backpressure steel roller and the grinding brush.

When the distance between the backpressure steel roller and the grinding brush needs to be adjusted, the servo motor is started to drive the lifting ball screw 12 to rotate, the lifting seat is driven by the lifting ball screw 12 to move along the lifting ball screw 12 to drive the lifting plate 21 to lift, and then the backpressure steel roller is driven to lift.

In the process that the back pressure steel roller rises, the steel roller gear 3 applies an upward force to the transition gear set 4, so that the transition gear set 4 swings upward with the first transition gear 41 as the center, the spring 61 is extruded, and the positioning rod 62 is pushed to swing to the side away from the speed reducer 1 with the fixed block 63 as the center. The spring 61 is extruded to apply a counterforce to the swing arm 43, so that the second transition gear 42 on the swing arm 43 can be always engaged with the steel roller gear 3, and the driving gear 5 and the steel roller gear 3 can always keep a transmission relation in the rising process of the back pressure steel roller.

Meanwhile, when the back pressure steel roller descends, the spring 61 loses the extrusion from the steel roller gear 3 to restore the deformation, and the swing arm 43 is pressed downwards, so that the second transition gear 42 and the steel roller gear 3 can be meshed with the steel roller gear 3 when the back pressure steel roller descends, and the driving gear 5 and the steel roller gear 3 can be ensured to be always in a transmission relation in the descending process of the back pressure steel roller.

Compared with the prior art, the pressing adjustment assembly 6 in this embodiment is provided with a positioning rod 62 on the basis of the spring 61, and a movable moving block 64 is provided on the positioning rod 62, so that the spring 61 is sleeved on the positioning rod 62, one end of the spring 61 is connected to the transition gear set 4, and the other end of the spring 61 abuts against the moving block 64. Therefore, the free length of the spring 61 (the length of the spring 61 when the steel roller gear 3 does not apply external force to the spring 61) can be adjusted by moving the movable block 64, so that the spring 61 can always apply enough elastic force to the transition gear set 4, the transition gear set 4 can always be meshed with the steel roller gear 3 on the back pressure steel roller in the lifting process of the back pressure steel roller, and the driving gear 5 can effectively drive the back pressure steel roller to rotate in the lifting process.

Further, since the free length of the spring 61 can be adjusted, the length of the spring 61 can be increased, and the length of the spring 61 can be adjusted within an appropriate range by the movable block 64. The long spring 61 can provide wider elastic range and stronger elasticity, effectively reduces the situation that the spring 61 is contracted or stretched to the limit, has longer service life and more stable working state, and can avoid the problem that the transition gear set 4 jumps due to the reduction of the toughness of the spring 61.

Preferably, in the present embodiment, the positioning rod 62 has a threaded portion 62a, and the moving block 64 is sleeved on the threaded portion 62a and is in threaded engagement with the threaded portion 62 a. Thus, the movable block 64 can be moved by rotating the movable block 64, and the length of the spring 61 in the free state can be adjusted.

Specifically, in the present embodiment, a nut is used for the movable block 64.

Preferably, in the present embodiment, a contact portion 43a is provided on the swing arm 43, an end portion of the spring 61 is connected to the contact portion 43a, and an axis of the spring 61 is perpendicular to a surface of the contact portion 43 a. Thereby, the spring 61 is compressed.

The above is only the preferred embodiment of the present invention, not used in the present invention, and any slight modifications, equivalent replacements and improvements made by the technical entity of the present invention to the above embodiments should be included in the protection scope of the technical solution of the present invention.

Claims

1. A compression adjusting assembly of a transition gear is used for applying variable elastic force to a transition gear set between a steel roller gear and a driving gear so that the steel roller gear can be kept in a meshing relationship with the driving gear through the transition gear set; the gear shifting mechanism is characterized by comprising a spring and a positioning rod, wherein the spring is sleeved on the positioning rod, and one end of the spring is connected to the transition gear set; the positioning rod is provided with a movable block capable of moving along the axial direction of the positioning rod, and the other end of the spring abuts against the movable block.

2. The transition gear compression adjustment assembly of claim 1, wherein the positioning rod is sleeved with a fixed block, and the fixed block is rotatably sleeved in a fixed seat.

3. The transition gear compression adjustment assembly of claim 1, wherein the positioning rod has a threaded portion, and the moving block is disposed on the threaded portion and threadedly engaged with the threaded portion.

4. The transition gear compression adjustment assembly of claim 3, wherein the movable block is a nut.

5. The transition gear compression adjustment assembly of any one of claims 1-4, wherein the axis of the spring is perpendicular to the contact surface where the spring and the transition gear set abut.

6. A backpressure steel roller lifting mechanism comprises a steel roller gear, a driving gear and a transition gear set, wherein the steel roller gear and the driving gear are in meshing transmission through the transition gear set; the transition gear compression adjustment assembly of any one of claims 1 to 5 further comprising a compression adjustment assembly in compression contact with the transition gear set to apply a variable spring force to the transition gear set between the steel roller gear and the drive gear such that the steel roller gear is maintained in meshing relationship with the drive gear through the transition gear set.