CN217406316U - Transmission structure with gap eliminating and noise reducing functions - Google Patents

Abstract

A transmission structure with functions of eliminating gaps and reducing noise, comprising: a linear axis transfer platform, a rotary axis platform driven and displaced by the linear axis shifting platform, and a rotary axis platform mounted on the rotary axis platform and connected to the linear axis displacement platform. A transmission member connected with the screw rod of the carrier base, the transmission member includes an outer seat, an inner shaft sleeve and a spring member, the transmission member moves along the displacement of the screw rod, and drives the rotation shaft base to displace through the outer seat, Because one end of the spring member of the transmission member abuts against the outer seat and the other end normally pushes against the inner bushing, it ensures that the second screw hole of the inner bushing can indeed engage the screw rod, and keeps the distance between the transmission member and the screw rod. The tight fit state further avoids the generation of transmission clearance and at the same time helps to reduce the operating noise, so that the sliding movement of the rotary shaft pedestal is more accurate and smooth.

Description

Transmission structure with the function of eliminating backlash and reducing noise

technical field

The utility model relates to a transmission structure applied to a precision sliding table, in particular to a transmission structure with functions of eliminating gaps and reducing noise.

Background technique

The transmission structure of the existing precision sliding table, as shown in FIG. 8 and FIG. 9 , includes a transmission member 40 . The transmission member 40 is integrally formed with a connecting seat 41 and a horizontal protrusion from the center of the connecting seat 41 . A connecting shaft 42 is provided, and the transmission member 40 is axially penetrated through the connecting seat 41 and the connecting shaft 42 is provided with a connecting screw hole 43 , and the transmission member 40 is screwed with the connecting screw hole 43 to a drive screw of the transfer base 50, and then the transmission member 40 is assembled on a pillow block 60 driven and displaced by the transfer base. Accordingly, when the driving screw 50 rotates, the transmission member 40 will move along the driving screw 50. The pillow block 60 is moved and pulled to linear displacement.

Looking at the above-mentioned existing structure, it is not difficult to find that there are still some shortcomings. The main reasons are as follows: the existing transmission member 40 is actuated by the rotation and displacement of the connecting screw hole 43 along the driving screw 50 for a long time, and also requires At the same time, the pivot block 60 is pulled for linear displacement, so that the connecting screw hole 43 of the transmission member 40 is easily lost due to load friction, so that there is a gap between the forward and reverse movement strokes of the transmission member 40 and the driving screw 50. Therefore, when driving the shaft When the stage 60 is displaced, the power cannot follow the transmission due to the gap, which increases the power consumption of the driving screw 50. When the 40 is displaced along the driving screw 50, forward and reverse impact noise will be generated, and at the same time, the stability and accuracy of the movement of the precision slide table will be affected.

Utility model content

The technical problem to be solved by the present invention is to provide a transmission structure with functions of eliminating gap and reducing noise, aiming at the above-mentioned shortcomings of the prior art.

The structure of the utility model comprises: a linear axis transfer platform base, a rotating axis platform seat and a transmission part, one end of the linear axis transfer platform seat is horizontally arranged with a drive motor, and the drive motor is connected towards the inner side of the linear axis transfer platform seat. A screw is moved; the rotating shaft pedestal can be horizontally displaced and stacked on the linear axis transfer base, and one end of the rotating shaft pedestal faces the screw with a horizontally extending connecting hole; the transmission element includes an outer seat, an inner A shaft sleeve and a spring member, the outer seat horizontally extends a shaft column, the shaft column axially penetrates both ends with a first screw hole, the inner shaft sleeve axially penetrates both ends with a second screw hole, and the inner One end of the shaft sleeve is radially expanded with a stop wall, the spring member is sleeved between the shaft column of the outer seat and the inner shaft sleeve, and the shaft column and the inner shaft sleeve are connected by a fitting concave-convex structure Restriction, the screw is threadedly connected to the outer seat and the inner bushing along the first and second screw holes, the shaft post, the inner bushing and the spring member are inserted into the connection hole, and the outer seat is locked. It is fixed on the end face of the rotating shaft base, and accordingly, when the screw is screwed through the driving motor, the transmission member will move along the screw to reach the horizontal displacement of the rotating shaft base on the linear axis transfer base. Purpose.

Preferably, the shaft column is axially provided with at least two relatively symmetrical fitting recesses at the opposite end of the outer seat, and the inner sleeve is axially provided with at least two opposite ends of the blocking wall. A relatively symmetrical fitting protrusion.

The beneficial effect of the present invention is that: the transmission member moves along the displacement of the screw rod, and drives the rotation shaft base to displace through the outer seat, because one end of the spring member of the transmission member abuts against the outer seat and pushes the other end normally Abut the inner shaft sleeve to ensure that the second screw hole of the inner shaft sleeve can indeed engage the screw rod, maintain the tight fit between the transmission element and the screw rod, further avoid transmission clearance and help reduce operating noise at the same time. It makes the sliding movement of the rotary shaft pedestal more accurate and smooth.

Description of drawings

FIG. 1 is a perspective view of the utility model.

Figure 2 is an exploded view of the utility model.

FIG. 3 is a partial exploded view of the transmission element and the screw of the present invention.

FIG. 4 is a partial cross-sectional view of the utility model.

FIG. 5 is a schematic view of the rotary shaft pedestal according to the present invention sliding along the screw rod.

6 is a partial enlarged cross-sectional view of the transmission member and the screw rod of the present invention.

7 is a schematic diagram of the transmission element of the present invention generating a gap and pushing against the inner bushing via a spring element to maintain a tight fit state.

FIG. 8 is a perspective view of a transmission member in the prior art.

FIG. 9 is a schematic diagram of the use of a transmission element in the prior art to generate a gap.

In the picture:

[this utility model]

10: Linear axis transfer pedestal; 11: Drive motor; 12: Screw; 20: Rotary axis pedestal; 21: Connecting hole;

30: Transmission part; 31: External seat; 311: Shaft column; 312: First screw hole; 313: Fitting recess; 32: Inner bushing

321: the second screw hole; 322: the blocking wall; 323: the fitting convex part; 33: the spring member.

[current technology]

40: transmission part; 41: connecting seat; 42: connecting shaft; 43: connecting screw hole; 50: driving screw; 60: pillow block.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and implement it, but the examples are not intended to limit the present utility model.

First of all, as shown in FIG. 1 to FIG. 3 , a transmission structure with functions of eliminating gaps and reducing noise includes: a linear axis moving platform 10 , a rotating axis platform 20 and a transmission member 30 . A drive motor 11 is horizontally located at one end of the axis-shifting platform 10, and the driving motor 11 is connected with a screw 12 toward the inner side of the linear axis-shifting platform 10; the rotating axis platform 20 can be horizontally displaced and stacked on the linear axis On the transfer base 10 , one end of the rotating shaft base 20 faces the screw 12 and has a horizontally extending connecting hole 21 ; the transmission member 30 includes an outer seat 31 , an inner shaft sleeve 32 and a spring member 33 , the outer seat 33 . 31 horizontally extends a shaft column 311, the shaft column 311 axially penetrates both ends with a first screw hole 312, the inner shaft sleeve 32 axially penetrates both ends with a second screw hole 321, and one end of the inner shaft sleeve 32 is provided A stop wall 322 is extended radially outward, the spring member 33 is sleeved between the shaft column 311 of the outer socket 31 and the inner shaft sleeve 32 , and the shaft column 311 is pivoted at the opposite end of the outer socket 31 . At least two symmetrical fitting concave portions 313 are provided in the axial direction, and at least two symmetrical fitting convex portions 323 are axially provided on the end of the inner sleeve 32 on the opposite side of the blocking wall 322 . The post 311 and the inner bushing 32 are connected and restricted by the concave-convex structure fitted together, which further restricts the rotation of the inner bushing 32 .

The composition of its structure, please see from FIG. 3 to FIG. 6 again, the spring member 33 of the transmission member 30 is sleeved between the shaft column 311 and the inner shaft sleeve 32, and the two ends of the spring member 33 are respectively contacted. Relying on the outer seat 31 and the blocking wall 322, and using the fitting concave portion 313 and the fitting convex portion 323, the shaft post 311 and the inner shaft sleeve 32 are fitted and restricted, the screw 12 first follows the first , Two screw holes 312, 321 are screwed with the outer seat 31 and the inner shaft sleeve 32, and then the shaft column 311 of the transmission member 30, the inner shaft sleeve 32 and the spring member 33 are placed in the rotating shaft seat 20. Inside the connecting hole 21 , the outer socket 31 is then locked and fixed on the end face of the rotating shaft base 20 . Accordingly, when the screw rod 12 is screwed by the driving motor 11 , the transmission member 30 will move along the screw rod. The purpose of horizontal displacement of the rotary shaft base 20 on the linear shaft transfer base 10 is achieved.

As mentioned above, the transmission member 30 moves along the screw 12, and drives the rotating shaft base 20 to displace through the outer socket 31. Since the transmission member 30 is used for a period of time due to the driving method through the engagement of the screw Afterwards, the gap between the first and second screw holes 312, 321 and the screw 12 is easily generated due to friction loss, because one end of the spring member 33 of the transmission member 30 abuts against the outer seat 31 and the other end normally pushes against the The stop wall 322 of the inner bushing 32 is also viewed as shown in FIG. 7 to ensure that the second screw hole 321 of the inner bushing 32 can indeed engage the screw 12 in reverse, keeping the transmission member 30 and the screw The tight fit between 12 further avoids the generation of transmission gaps and helps to reduce operating noise at the same time, so that the sliding movement of the rotating shaft pedestal 20 is more accurate and smooth.

The above-mentioned embodiments are only preferred embodiments for fully explaining the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present utility model is subject to the claims.

Claims (2)

1. A transmission structure with functions of eliminating gaps and reducing noise is characterized by comprising:

a linear shaft transfer pedestal, wherein one end part of the linear shaft transfer pedestal is horizontally provided with a driving motor, and the driving motor is linked with a screw rod towards the inner side of the linear shaft transfer pedestal;

a rotating shaft pedestal which can be horizontally displaced and is superposed on the linear shaft transferring pedestal, wherein one end of the rotating shaft pedestal is provided with a connecting hole which extends horizontally and faces the screw rod;

a transmission member, the transmission member includes an outer connection base, an inner shaft sleeve and a spring member, the outer connection base extends horizontally to form a shaft post, the shaft post axially penetrates through two ends of the shaft post to form a first screw hole, the inner shaft sleeve axially penetrates through two ends of the shaft post to form a second screw hole, one end of the inner shaft sleeve radially expands outward to form a stop wall, the spring member is sleeved between the shaft post of the outer connection base and the inner shaft sleeve, the shaft post and the inner shaft sleeve are connected and limited by an embedded concave-convex structure, the screw rod is in screw rotation connection with the outer connection base and the inner shaft sleeve along the first screw hole and the second screw hole, the shaft post, the inner shaft sleeve and the spring member are placed in the connecting hole, and the outer connection base is locked and fixed on the end surface of the rotating shaft base, accordingly, when the screw rod is in screw rotation, the transmission member can achieve the purpose of horizontal displacement of the rotating shaft base along the screw rotation of the screw rod, and one end of the spring element is abutted and limited by the external connecting seat and pushes the other end of the spring element to the stop wall of the inner shaft sleeve normally, so that the transmission element and the screw rod are effectively kept in a tight fit state.

2. The transmission structure of claim 1, wherein the shaft post has at least two symmetrical engaging recesses at the opposite end of the external seat, and the inner sleeve has at least two symmetrical engaging protrusions at the opposite end of the stop wall.

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