CN212839231U

CN212839231U - Gear shifting mechanism of polishing machine

Info

Publication number: CN212839231U
Application number: CN202021545884.6U
Authority: CN
Inventors: 鞠晓峰; 朱群山
Original assignee: Lvgeluo Machinery Ningbo Co ltd
Current assignee: Lvgeluo Machinery Ningbo Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-30
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a gear shifting mechanism of a polishing machine, which comprises a shell, a power shaft and an output shaft, wherein an eccentric block is arranged in the shell, the power shaft extends into the shell and is fixedly connected with the eccentric block, the output shaft is rotatably connected with the eccentric block, the output shaft and the power shaft are eccentrically arranged, a locking block is arranged on the output shaft, a groove is arranged on the locking block, a shifting fork is hinged on the eccentric block, a clamping block matched with the groove in a locking way is arranged on the shifting fork, and the shifting fork always has a motion trend that the clamping block is clamped into the groove; the shell is provided with a shifting button matched with the shifting fork, and the shifting button is used for changing the movement trend of the shifting fork so as to separate the clamping block from the groove. The utility model discloses possess simple structure reasonable, simple to operate and advantage with low costs.

Description

Gear shifting mechanism of polishing machine

Technical Field

The utility model belongs to the technical field of the burnishing machine, in particular to burnishing machine gearshift.

Background

The polishing machine is also called as a grinder, and is often used for mechanical grinding, polishing and waxing, so that the roughness of the surface of a workpiece is reduced, the surface of the workpiece becomes bright and flat, and the handheld polishing machine is a small portable device, small in size, capable of being operated by a single person and convenient to carry.

The polishing machine as disclosed in chinese patent publication No. CN207027196U mainly includes a polishing pad, a motor, an output member, a transmission device, and a mode selection device, the transmission device including a support shaft portion and an eccentric shaft portion, the output member having an external gear portion connected to the eccentric shaft portion so as to be rotatable about a second axis with respect to the eccentric shaft portion, and the output member connected to the eccentric shaft portion so as to be rotatable about the second axis with respect to the eccentric shaft portion and having an external gear portion; and an inner gear member rotatable relative to the transmission housing about a first axis, further comprising an inner gear portion engaged with the outer gear portion of the output member; the mode selection device includes an engagement member, and the internal gear member includes an engagement portion for engagement with the engagement member of the mode selection device. By operating the mode selection means, the engagement member is disengaged or engaged from the engagement portion of the internal gear member, thereby switching the manner of motion between a first mode (i.e., a free-rotation mode) that can cause the output member to revolve around a first axis and to freely rotate around a second axis that is offset from the first axis, and a second mode (i.e., a forced-rotation mode); the second mode may cause the output member to revolve around the first axis and forcibly rotate the output member around the second axis. Although the motion mode of the polishing machine can be changed by changing the motion state of the transmission device through the mode selection device (the changed motion is also called as a gear shifting motion, or the two devices are together called as a gear shifting mechanism), so as to realize the selection (or gear shifting) of the motion mode, the structure of the components is complex, the gear structure is relatively troublesome and high in cost in manufacturing, the number of parts is large, and the matching among the parts is relatively complex, so that the installation is troublesome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a burnishing machine gearshift, possess simple structure reasonable, simple to operate and advantage with low costs.

The utility model provides a technical scheme that its technical problem adopted is: a gear shifting mechanism of a polishing machine comprises a shell, a power shaft and an output shaft, wherein an eccentric block is arranged in the shell, the power shaft extends into the shell and is fixedly connected with the eccentric block, the output shaft is rotatably connected with the eccentric block, the output shaft and the power shaft are eccentrically arranged, a locking block is arranged on the output shaft, a groove is formed in the locking block, a shifting fork is hinged to the eccentric block, a clamping block matched with the groove in a locking mode is arranged on the shifting fork, and the shifting fork always has a motion tendency that the clamping block is clamped into the groove; the shell is provided with a shifting button matched with the shifting fork, and the shifting button is used for changing the movement trend of the shifting fork so as to separate the clamping block from the groove.

Furthermore, the gear shifting button is annular, the gear shifting button is movably arranged on the shell, a sliding block is arranged on the gear shifting button along the circumferential direction, and a stop surface is arranged on the shell along the circumferential direction; when the gear shifting button is rotated, the sliding block slides along the stop surface, so that the gear shifting button moves relative to the axial direction of the shell, and the clamping block is clamped into the groove or separated from the groove.

Furthermore, be equipped with in the casing with the shift fork offsets complex sliding gasket, be equipped with the breach on the casing, be equipped with the spliced pole on the sliding gasket, the spliced pole passes the breach and with shift button fixed connection, the spliced pole with breach sliding fit makes simple to operate.

Further, the stop surface comprises a first straight section, a second straight section, and a climbing section for connecting the first straight section and the second straight section.

Furthermore, the shifting fork comprises a locking portion, a hinged portion and a gear shifting portion, the locking portion and the gear shifting portion are respectively arranged at two ends of the hinged portion, the clamping block is convexly arranged on the locking portion, the eccentric block is provided with a hinged seat matched with the hinged portion in a hinged mode, a spring is arranged between the gear shifting portion and the eccentric block in a supporting mode, and the spring always tends to push the clamping block into the groove.

Furthermore, a through hole is formed in the shifting fork, and the upper end of the eccentric block penetrates through the through hole to be fixedly connected with the power shaft, so that the mounting is convenient.

The utility model has the advantages that: the output shaft is provided with the locking block, the locking block is provided with the groove, the eccentric block is hinged with the shifting fork, the shifting fork is provided with the fixture block matched with the groove in a locking way, and the shifting fork always has a motion trend of clamping the fixture block into the groove; the shell is provided with a shifting button matched with the shifting fork, the shifting button is used for changing the movement trend of the shifting fork so as to separate the clamping block from the groove, when the clamping block is clamped into the groove to be locked and matched, the power shaft rotates to drive the eccentric block to rotate, the output shaft is locked at the moment, the output shaft rotates around the same axis along with the power shaft, namely, the power shaft rotates automatically, the output shaft revolves around the power shaft, and the movement state is a forced operation mode; when the clamping block is not clamped into the groove, the power shaft rotates to drive the eccentric block to rotate, the output shaft is in an unlocking state at the moment, the output shaft does not rotate together with the power shaft, namely the power shaft rotates automatically, the output shaft can freely rotate along the axis of the output shaft while revolving around the power shaft, and the motion state is a free running mode; the shifting knob is driven to move and the shifting fork is driven to rotate, so that the clamping block and the groove can be switched from a locking state to an unlocking state, and the switching between two gears is realized; meanwhile, a transmission mode of gear engagement in the prior art is abandoned, the structure is simplified, and the transmission mode is more reasonable and simpler, so that the cost is reduced, and the manufacture is convenient; generally, the utility model discloses simple structure is reasonable, simple to operate, convenient manufacturing and advantage with low costs have been possessed.

Drawings

Fig. 1 is an exploded schematic view of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a schematic structural diagram of the middle shifting fork of the present invention.

Fig. 4 is a schematic structural diagram of the shift knob of the present invention.

Fig. 5 is a schematic structural diagram of the middle housing of the present invention.

Fig. 6 is a schematic view of the present invention applied to a polishing machine.

Shown in the figure: 1-a shell; 1.1-notch; 1.2-stop face; 2-a power shaft; 3-an output shaft; 4-an eccentric mass; 4.1-hinged seat; 4.2-mounting holes; 5-locking the block; 5.1-grooves; 6-a shifting fork; 6.1-fixture block; 6.2-locking part; 6.3-hinge; 6.4-gear shifting part; 6.5-through holes; 7-gear shifting knob; 7.1-a slide block; 8-a sliding gasket; 8.1-connecting column; 9-a spring; 10-a bearing; 11-a polishing pad; 12-a pin; 13-polishing machine body.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

as shown in fig. 1 to 6, a gear shifting mechanism of a polishing machine comprises a shell 1, a power shaft 2 and an output shaft 3, wherein an eccentric block 4 is arranged in the shell 1, the power shaft 2 extends into the shell 1 and is fixedly connected with the eccentric block 4, the output shaft 3 is rotatably connected with the eccentric block 4, the output shaft 3 and the power shaft 2 are eccentrically arranged, a locking block 5 is arranged on the output shaft 3, a groove 5.1 is formed in the locking block 5, a shifting fork 6 is hinged to the eccentric block 4, a clamping block 6.1 which is locked and matched with the groove 5.1 is arranged on the shifting fork 6, and the shifting fork 6 always has a movement tendency that the clamping block 6.1 is clamped into the groove 5.1; be equipped with on the casing 1 with shift fork 6 complex shift knob 7, shift knob 7 is used for changing shift fork 6's motion trend to make fixture block 6.1 and recess 5.1 separation.

Specifically, the eccentric block 4 is provided with a mounting hole 4.2 in a penetrating manner, the output shaft 3 is mounted in the mounting hole 4.2 through the bearing 10, and the locking block 5 is fixed at the upper end of the output shaft 3 through a screw, so that the locking block 5 is exposed out of the mounting hole 4.2 and corresponds to the clamping block 6.1.

The gear shifting button 7 is annular, the gear shifting button 7 is movably arranged on the shell 1, a sliding block 7.1 is arranged on the gear shifting button 7 along the circumferential direction, and a stop surface 1.2 is arranged on the shell 1 along the circumferential direction; when the gear shift knob 7 is rotated, the sliding block 7.1 slides along the stop surface 1.2, so that the gear shift knob 7 moves axially relative to the housing 1, and the clamping block 6.1 is clamped into the groove 5.1 or separated from the groove 5.1.

A sliding gasket 8 which is matched with the shifting fork 6 in an abutting mode is arranged in the shell 1, a notch 1.1 is formed in the shell 1, a connecting column 8.1 is arranged on the sliding gasket 8, the connecting column 8.1 penetrates through the notch 1.1 and is fixedly connected with the gear shifting button 7, and the connecting column 8.1 is matched with the notch 1.1 in a sliding mode; preferably, the notch 1.1 is circular-arc shaped.

The stop surface 1.2 comprises a first straight section, a second straight section and a climbing section for connecting the first straight section and the second straight section; specifically, the first straight section is positioned at the top of the climbing section, the second straight section is positioned at the bottom of the climbing section, when the sliding block 7.1 is positioned at the first straight section, the clamping block 6.1 is clamped into the groove 5.1 under the action of the spring 9, and the shifting fork 6 locks the output shaft 3; when the sliding block 7.1 is located at the second straight section, the shifting fork 6 overcomes the acting force of the spring 9, so that the clamping block 6.1 is separated from the groove 5.1, and the shifting fork 6 unlocks the output shaft 3.

Specifically, as shown in fig. 4 and 5, the stop surface 1.2 is provided on the side surface of the notch 1.1, and is in an open state, so that the manufacturing and installation are facilitated; three notches 1.1 are formed along the circumferential direction, and three corresponding stop surfaces 1.2 are also formed; correspondingly, three sliding blocks 7.1 are also arranged and correspond to the stop surfaces 1.2 one by one; the sliding gasket 8 and the gear shifting button 7 are both annular, and the gear shifting button 7 is sleeved on the shell 1.

The shifting fork 6 comprises a locking portion 6.2, a hinge portion 6.3 and a gear shifting portion 6.4, the locking portion 6.2 and the gear shifting portion 6.4 are respectively arranged at two ends of the hinge portion 6.3, a clamping block 6.1 is convexly arranged on the locking portion 6.2, an articulated seat 4.1 which is matched with the hinge portion 6.3 in an articulated mode is arranged on the eccentric block 4, a spring 9 is arranged between the gear shifting portion 6.4 and the eccentric block 4 in an abutting mode, and the spring 9 always tends to push the clamping block 6.1 into the groove 5.1.

Specifically, the hinge part 6.3 is in hinge fit with the hinge seat 4.1 through a pin 12.

A through hole 6.5 is formed in the shifting fork 6, and the upper end of the eccentric block 4 penetrates through the through hole 6.5 to be fixedly connected with the power shaft 2.

As shown in fig. 6, when in actual use, the utility model discloses a gearshift correspondence is installed on burnishing machine body 13, and power shaft 2 is connected with the driving motor transmission, and casing 1 fixes on burnishing machine body 13, and output shaft 3's lower extreme can be dismantled and be connected with polishing pad 11, and polishing pad 11 exposes the casing 1 outside.

The utility model discloses a concrete theory of operation: under a normal state, the sliding block 7.1 abuts against the first straight section of the stop surface 1.2, under the action force of the spring 9, the clamping block 6.1 is clamped into the groove 5.1, the locking block 5 is locked relative to the eccentric block 4, the output shaft 3 is also locked relative to the eccentric block 4, when the driving motor rotates and drives the power shaft 2, the eccentric block 4 rotates along with the power shaft 2, and as the output shaft 3 is locked, the output shaft 3 also rotates along with the power shaft 2, namely the power shaft 2 rotates, the output shaft 3 revolves around the power shaft 2, the output shaft 3 cannot rotate, and the motion state is a forced operation mode;

when gear shifting is needed, the gear shifting button 7 is rotated, so that the sliding block 7.1 slides along the stop surface 1.2, the sliding block 7.1 performs downhill motion along the climbing section, the sliding block 7.1 slides from the first straight section to the second straight section, the sliding gasket 8 moves downwards along the axial direction of the shell 1 while rotating along with the gear shifting button 7, thereby pushing the gear shifting part 6.4, making the gear shifting part 6.4 overcome the elasticity of the spring 9, the shifting fork 6 rotates around the pin 12, under the working principle of the lever, the clamping block 6.1 exits the groove 5.1 to unlock the locking block 5, when the driving motor rotates and drives the power shaft 2, the eccentric block 4 rotates along with the power shaft 2, the output shaft 3 is unlocked, the output shaft 3 does not rotate along with the power shaft 2, namely, the power shaft 2 rotates, the output shaft 3 revolves around the power shaft 2, and simultaneously, the output shaft 3 can rotate freely along the self axis, and the motion state is a free running mode;

when the free operation mode needs to be switched back to the forced operation mode, the gear shifting button 7 is rotated reversely, so that the sliding block 7.1 moves up along the slope climbing section, the sliding block 7.1 slides from the second straight section to the first straight section, when the explanation is needed, after the gear shifting button 7 is rotated, in order to ensure that the clamping block 6.1 is clamped into the groove 5.1, the polishing pad 11 is manually rotated to drive the output shaft 3 to rotate, so that the groove 5.1 on the locking block 5 moves simultaneously, and when the groove 5.1 rotates to the position of the clamping block 6.1, the clamping block 6.1 can be clamped into the groove 5.1 under the action force of the spring 9, so that the output shaft 3 is locked again.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The utility model provides a burnishing machine gearshift, includes casing (1), power shaft (2) and output shaft (3), be equipped with eccentric block (4) in casing (1), power shaft (2) stretch into in casing (1) and with eccentric block (4) fixed connection, output shaft (3) with eccentric block (4) rotate to be connected, output shaft (3) with power shaft (2) eccentric settings, its characterized in that: a locking block (5) is arranged on the output shaft (3), a groove (5.1) is formed in the locking block (5), a shifting fork (6) is hinged to the eccentric block (4), a clamping block (6.1) which is matched with the groove (5.1) in a locking mode is arranged on the shifting fork (6), and the shifting fork (6) always has a motion trend of clamping the clamping block (6.1) into the groove (5.1); the gear shifting device is characterized in that a gear shifting button (7) matched with the shifting fork (6) is arranged on the shell (1), and the gear shifting button (7) is used for changing the motion trend of the shifting fork (6) so as to enable the clamping block (6.1) to be separated from the groove (5.1).

2. The gear shifting mechanism of a polishing machine according to claim 1, wherein: the gear shifting button (7) is annular, the gear shifting button (7) is movably arranged on the shell (1), a sliding block (7.1) is arranged on the gear shifting button (7) along the circumferential direction, and a stop surface (1.2) is arranged on the shell (1) along the circumferential direction; when the gear shifting button (7) rotates, the sliding block (7.1) slides along the stop surface (1.2), so that the gear shifting button (7) moves axially relative to the shell (1), and the clamping block (6.1) is clamped into the groove (5.1) or separated from the groove (5.1).

3. The gear shifting mechanism of a polishing machine according to claim 2, wherein: be equipped with in casing (1) with shift fork (6) counterbalance complex sliding gasket (8), be equipped with breach (1.1) on casing (1), be equipped with spliced pole (8.1) on sliding gasket (8), spliced pole (8.1) pass breach (1.1) and with shift knob (7) fixed connection, spliced pole (8.1) with breach (1.1) sliding fit.

4. The gear shifting mechanism of a polishing machine according to claim 3, wherein: the stop surface (1.2) comprises a first straight section, a second straight section, and a climbing section for connecting the first straight section and the second straight section.

5. The gear shifting mechanism of a polishing machine according to claim 1, wherein: the shifting fork (6) comprises a locking part (6.2), a hinged part (6.3) and a shifting part (6.4), the locking part (6.2) and the shifting part (6.4) are respectively arranged at two ends of the hinged part (6.3), the clamping block (6.1) is convexly arranged on the locking part (6.2), a hinged seat (4.1) matched with the hinged part (6.3) in a hinged mode is arranged on the eccentric block (4), a spring (9) is arranged between the shifting part (6.4) and the eccentric block (4) in a supporting mode, and the spring (9) always has a tendency that the clamping block (6.1) is pushed to the inside of the groove (5.1).

6. The gear shifting mechanism of a polishing machine according to claim 5, wherein: a through hole (6.5) is formed in the shifting fork (6), and the upper end of the eccentric block (4) penetrates through the through hole (6.5) and is fixedly connected with the power shaft (2).