阅读说明：本技术 同步带端部连接装置、同步带长度调整装置、结构及方法 (Synchronous belt end connecting device, synchronous belt length adjusting device, structure and method ) 是由 王勇 张志良 胡江 唐吉辉 张维前 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种同步带端部连接装置、同步带长度调整装置、结构及方法,包括基座,基座设置有彼此连通的压板容纳腔和同步带容纳腔,压板容纳腔的宽度大于同步带容纳腔的宽度；压板容纳腔内设置有压板,压板包括一体的压紧部和啮合部,压紧部的宽度大于同步带容纳腔的宽度；啮合部设置有可与同步带齿啮合的齿形,啮合部的宽度小于或等于同步带容纳腔的宽度；基座上设置有可使压板在竖直方向移动的紧定螺钉；本发明通过两个同步带连接装置配合一个连接板,快速的将两段同步带连接起来,打破了同步带传动设计受限的壁垒,增加了同步带传动设计和应用的灵活性；另外,本发明还具备同步带张紧功能,张紧度大小可调控,保证了同步带的最大拉力利用率。(The invention discloses a synchronous belt end connecting device, a synchronous belt length adjusting structure and a synchronous belt length adjusting method, wherein the synchronous belt length adjusting device comprises a base, a pressing plate accommodating cavity and a synchronous belt accommodating cavity are arranged on the base and are communicated with each other, and the width of the pressing plate accommodating cavity is larger than that of the synchronous belt accommodating cavity; the pressing plate accommodating cavity is internally provided with a pressing plate, the pressing plate comprises a pressing part and a meshing part which are integrated, and the width of the pressing part is greater than that of the synchronous belt accommodating cavity; the meshing part is provided with a tooth form which can be meshed with the synchronous belt teeth, and the width of the meshing part is smaller than or equal to that of the synchronous belt accommodating cavity; a set screw capable of enabling the pressure plate to move in the vertical direction is arranged on the base; according to the invention, two synchronous belt connecting devices are matched with one connecting plate, so that two synchronous belts are quickly connected, the barrier of the limited synchronous belt transmission design is broken, and the flexibility of the synchronous belt transmission design and application is increased; in addition, the invention also has the function of tensioning the synchronous belt, the tension degree can be regulated and controlled, and the maximum tension utilization rate of the synchronous belt is ensured.)

1. The utility model provides a hold-in range end connection device which characterized by: comprises a base (1); the base (1) is provided with a pressing plate accommodating cavity (2) and a synchronous belt accommodating cavity (3) which are communicated with each other; the width of the pressure plate accommodating cavity (2) is greater than that of the synchronous belt accommodating cavity (3);

a pressing plate (4) is arranged in the pressing plate accommodating cavity (2); the pressing plate (4) comprises a pressing part (4a) and an engaging part (4b) which are integrated; the width of the pressing part (4a) is larger than that of the synchronous belt accommodating cavity (3);

the meshing part (4b) is provided with a tooth form which can be meshed with the synchronous belt; the width of the meshing part (4b) is less than or equal to the width of the synchronous belt accommodating cavity (3);

the base (1) is provided with a set screw (5) which can enable the pressure plate (4) to move in the vertical direction.

2. The utility model provides a hold-in range length adjustment device which characterized by: comprises a connecting plate (6); a first synchronous belt connecting device (100) and a second synchronous belt connecting device (200) are arranged below the connecting plate (6); the first and second synchronous belt connecting devices (100, 200) have the same structure as the synchronous belt end connecting device of claim 1;

the first synchronous belt connecting device (100) or/and the second synchronous belt connecting device (200) is/are longitudinally movably connected to the connecting plate (6).

3. The synchronous belt length adjusting apparatus as claimed in claim 2, wherein: the connecting plate (6) comprises a longitudinal connecting plate (6a) and a vertical connecting plate (6b) which are integrated, the longitudinal connecting plate (6a) is arranged on the upper surfaces of the first synchronous belt connecting device (100) and the second synchronous belt connecting device (200), and the vertical connecting plate (6b) is arranged on the outer side surface of the first synchronous belt connecting device (100) or the second synchronous belt connecting device (200) along the longitudinal direction;

a tensioning screw (7) is arranged on the vertical connecting plate (6 b); the screw end face of the tensioning screw (7) abuts against the base of the first synchronous belt connecting device (100) or/and the second synchronous belt connecting device (200).

4. The synchronous belt length adjusting apparatus as claimed in claim 3, wherein: a strip-shaped hole (8) is formed in the longitudinal connecting plate (6 a); and the compression screw (9) penetrates through the strip-shaped hole (8) and then is connected with the base of the first synchronous belt connecting device (100) or/and the second synchronous belt connecting device (200).

5. The synchronous belt length adjustment device of claim 4, wherein: the first synchronous belt connecting device (100) is connected with the longitudinal connecting plate (6a) through a fixing screw (10); the second synchronous belt connecting device (200) is connected with the longitudinal connecting plate (6a) through the compression screw (9); the screw rod end surface of the tensioning screw (7) abuts against the base of the second synchronous belt connecting device (200).

6. The synchronous belt length adjusting apparatus as claimed in claim 5, wherein: the longitudinal connecting plate (6a) comprises a first synchronous belt connecting device connecting part and a second synchronous belt connecting device connecting part;

a plurality of fixing screw mounting holes (6a1) are formed in the connecting part of the first synchronous belt connecting device along the longitudinal direction, the centers of the fixing screw mounting holes (6a1) are positioned on the same straight line, and the fixing screws (10) are in clearance fit with the fixing screw mounting holes (6a 1);

strip hole (8) are located on the second hold-in range connecting device connecting portion, strip hole (8) and housing screw (9) are in transverse direction clearance fit.

The center line of the strip-shaped hole is parallel to a straight line where the centers of the plurality of fixing screw mounting holes formed in the first synchronous belt connecting device along the longitudinal direction are located.

7. The synchronous belt length adjusting apparatus as claimed in claim 5, wherein: the first synchronous belt connecting device (100) is provided with a first guide groove, the second synchronous belt connecting device (200) is provided with a second guide groove corresponding to the first guide groove, and the first guide groove and the second guide groove are matched with the lower portion of the longitudinal connecting plate (6 a).

8. The utility model provides a hold-in range length adjustment structure, characterized by: comprising the synchronous belt length adjustment device as claimed in any one of claims 2 to 7,

a pressing plate of the first synchronous belt connecting device (100) is meshed with one end of a synchronous belt, and a set screw in the first synchronous belt connecting device compresses the pressing plate to enable the lower surface of a compressing part to be tightly attached to the lower surface of a holding cavity of the pressing plate;

the pressing plate of the second synchronous belt connecting device (200) is meshed with the other end of the synchronous belt, and a set screw in the second synchronous belt connecting device compresses the pressing plate, so that the lower surface of the compressing part is tightly attached to the lower surface of the accommodating cavity of the pressing plate.

9. A synchronous belt length adjusting method is characterized by comprising the following steps:

1) cutting the synchronous belt to form a first end and a second end;

2) the first end is fixed in the first base, and the second end is fixed in the second base;

3) providing a connecting plate; the first base is fixed with the connecting plate, and the second base is connected with the connecting plate in a mode of moving along the length direction of the synchronous belt.

Technical Field

The invention relates to a tensioning structure and a tensioning method of a synchronous belt.

Background

For tensioning the synchronous belt, the prior art generally adds a sliding device on a mounting base of a driving wheel or a driven wheel, which has the advantage that no additional auxiliary mechanism is arranged between the two wheels, and other parts or electronic components can be arranged, but the distance between the two shafts cannot be fixed, so that the synchronous belt cannot be used in the occasions where the distance between the two shafts is fixed, such as the master hand of a surgical robot.

Another conventional solution in the prior art is to add an idler pulley or a group of idler pulleys on the outer side of the timing belt, and to adjust the position of the idler pulley to control the position of the pulley, which can overcome the disadvantages of the above-mentioned tensioning solution, but due to the existence of the idler pulley, the friction of the timing belt is increased, and a part of the tension is offset due to the problem of the tensioning angle. Because the maximum tension of the synchronous belt of the same model and the same material is fixed, if the tension is improper, the tension is offset, and in addition, the friction loss is reduced, so that the effective tension which can be utilized by the synchronous belt is reduced. Especially when transmission distance is than far away, and the space is restricted, can not select when wider, the bigger hold-in range of specification, extravagant pulling force can lead to the pretightning force of hold-in range not enough to lead to the output shaft to appear not hard up problem.

In addition, in some special cases, when the distance between shafts is limited and the diameter of the synchronous pulley is relatively fixed, a proper synchronous belt cannot be selected, and a longer synchronous belt needs to be cut short and then connected.

General synchronous belt manufacturers all produce the fixed number of teeth's synchronous belt through the mould, but the number of teeth of synchronous belt is discontinuous, and the number difference of two synchronous belt teeth of some same models has even reached 25. Due to the limitation of the tooth number of the synchronous belt, when engineers design the synchronous belt transmission, the shaft distance of the driving wheel and the driven wheel must be determined by considering the tooth number of the synchronous belt, so that the design of the synchronous belt transmission is limited. And under some special circumstances, the distance between the shafts of the main driving wheel and the driven wheel and the diameter of the synchronous pulley are determined values, the number of teeth of the synchronous belt corresponding to the distance between the shafts is possibly the number of teeth in the nonexistence, so that the proper synchronous belt cannot be selected, if the synchronous belt is ordered by independently opening a die, the use cost of the synchronous belt is greatly increased, and in order to solve the problem, the longer synchronous belt needs to be cut short and then connected.

Because of the restriction that receives the above-mentioned condition, when the engineer designed synchronous belt drive, when synchronous pulley's number of teeth received the restriction, must be forced to select suitable interaxial distance and adapt to suitable synchronous belt number of teeth, and this makes the product of design have certain regret.

Therefore, those skilled in the art have been devoted to develop a tension structure of a timing belt having a high utilization rate of tension of the timing belt when the shaft interval is fixed.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a synchronous belt tensioning structure with high utilization rate of synchronous belt tension when the shaft distance is fixed.

In order to achieve the purpose, the invention provides a synchronous belt end connecting device which comprises a base, wherein the base is provided with a pressing plate accommodating cavity and a synchronous belt accommodating cavity which are communicated with each other, and the width of the pressing plate accommodating cavity is greater than that of the synchronous belt accommodating cavity;

a pressing plate is arranged in the pressing plate accommodating cavity and comprises a pressing part and a meshing part which are integrated, and the width of the pressing part is greater than that of the synchronous belt accommodating cavity;

the meshing part is provided with a tooth form capable of meshing with the synchronous belt teeth, and the width of the meshing part is smaller than or equal to that of the synchronous belt accommodating cavity;

and the base is provided with a set screw which can enable the pressure plate to move in the vertical direction.

The utility model provides a hold-in range length adjustment device, includes the connecting plate, the below of connecting plate is provided with first hold-in range connecting device and second hold-in range connecting device, and the structure of first hold-in range connecting device and second hold-in range connecting device is the same with foretell hold-in range tip connecting device's structure.

The first synchronous belt connecting device or/and the second synchronous belt connecting device is/are longitudinally movably connected to the connecting plate.

In order to facilitate moving the first synchronous belt connecting device or/and the second synchronous belt connecting device and adjusting the tensity of the synchronous belt, the connecting plate comprises a longitudinal connecting plate and a vertical connecting plate which are integrated, the longitudinal connecting plate is arranged on the upper surfaces of the first synchronous belt connecting device and the second synchronous belt connecting device, and the vertical connecting plate is arranged on the outer side surface of the first synchronous belt connecting device or the second synchronous belt connecting device along the longitudinal direction;

and a tensioning screw is arranged on the vertical connecting plate, and the end face of a screw rod of the tensioning screw abuts against the base of the first synchronous belt connecting device or/and the base of the second synchronous belt connecting device.

In order to adjust and fix the positions of the first synchronous belt connecting device or/and the second synchronous belt connecting device on the vertical connecting plate, the tensioning of the synchronous belts is realized, a strip-shaped hole is formed in the longitudinal connecting plate, and a compression screw penetrates through the strip-shaped hole and then is connected with the base of the first synchronous belt connecting device or/and the base of the second synchronous belt connecting device.

In order to facilitate the tensity of connecting the synchronous belt and adjusting the synchronous belt by an operator, the first synchronous belt connecting device is connected with the longitudinal connecting plate through a fixing screw, the second synchronous belt connecting device is connected with the longitudinal connecting plate through a compression screw, and the screw end face of the tension screw is abutted against the base of the second synchronous belt connecting device.

In order to fix the connecting plate and the first synchronous belt connecting device in parallel and enable the connecting plate to slide in parallel relative to the second synchronous belt connecting device so as to ensure that two ends of the synchronous belts are positioned on the same straight line, the longitudinal connecting plate comprises a first synchronous belt connecting device connecting part and a second synchronous belt connecting device connecting part;

a plurality of fixing screw mounting holes are formed in the connecting part of the first synchronous belt connecting device along the longitudinal direction, the centers of the fixing screw mounting holes are positioned on the same straight line, and the fixing screws are in clearance fit with the fixing screw mounting holes;

the strip-shaped hole is located on the connecting portion of the second synchronous belt connecting device, and the strip-shaped hole is in clearance fit with the compression screw in the transverse direction. The center line of the strip-shaped hole is parallel to a straight line where the centers of the plurality of fixing screw mounting holes formed in the first synchronous belt connecting device along the longitudinal direction are located.

In order to ensure that two ends of the synchronous belt are positioned on the same straight line, a first guide groove is formed in the first synchronous belt connecting device, a second guide groove is formed in the second synchronous belt connecting device and corresponds to the first guide groove, and the first guide groove and the second guide groove are matched with the lower portion of the longitudinal connecting plate.

A synchronous belt length adjusting structure, comprising the synchronous belt length adjusting device, wherein,

a pressing plate of the first synchronous belt connecting device is meshed with one end of the synchronous belt, and a set screw in the first synchronous belt connecting device presses the pressing plate tightly, so that the lower surface of the pressing part is tightly attached to the lower surface of the pressing plate accommodating cavity;

the pressing plate of the second synchronous belt connecting device is meshed with the other end of the synchronous belt, and a set screw in the second synchronous belt connecting device presses the pressing plate tightly, so that the lower surface of the pressing part is tightly attached to the lower surface of the accommodating cavity of the pressing plate.

A method for adjusting the length of a synchronous belt comprises the following steps:

1) cutting the synchronous belt to make it have first end and second end,

2) the first end is fixed in the first base, the second end is fixed in the second base,

3) and providing a connecting plate, fixing the first base and the connecting plate, and connecting the second base and the connecting plate in a manner of moving along the length direction of the synchronous belt.

According to the invention, two synchronous belt connecting devices are matched with one connecting plate, so that two sections of synchronous belts can be quickly connected, the barrier that the synchronous belt transmission design is limited by the number of teeth of the synchronous belts is broken, and the flexibility of the synchronous belt transmission design and application is increased; in addition, the invention also has the function of tensioning the synchronous belt, the tension degree can be regulated and controlled, and the maximum tension utilization rate of the synchronous belt is ensured.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is an enlarged schematic view of the structure at D in FIG. 4;

FIG. 6 is a schematic front view of the structure of FIG. 1;

FIG. 7 is a schematic left side view of the structure of FIG. 1;

FIG. 8 is a schematic view of a tension screw according to an embodiment of the present invention;

fig. 9 is a use state reference diagram of the present invention.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

a method for adjusting the length of a synchronous belt comprises the following steps:

1) cutting the synchronous belt to make it have first end and second end,

2) the first end is fixed in the first base, the second end is fixed in the second base,

3) and providing a connecting plate, fixing the first base and the connecting plate, and connecting the second base and the connecting plate in a manner of moving along the length direction of the synchronous belt.

The length adjusting method of the synchronous belt can be realized by the end connecting device of the synchronous belt. As shown in fig. 1 and 6, the end connecting device for the synchronous belt comprises a base 1, wherein the base 1 is provided with a pressing plate accommodating cavity 2 and a synchronous belt accommodating cavity 3 which are communicated with each other, and the width of the pressing plate accommodating cavity 2 is larger than that of the synchronous belt accommodating cavity 3.

The pressing plate is provided with a pressing plate 4 in the holding cavity 2, the pressing plate 4 comprises a pressing part 4a and a meshing part 4b which are integrated, and the width of the pressing part 4a is larger than that of the holding cavity 3 of the synchronous belt.

The meshing part 4b is provided with a tooth form capable of meshing with the timing belt teeth, and the width of the meshing part 4b is smaller than the width of the timing belt accommodating chamber 3.

The base 1 is provided with a set screw 5 which can move the pressure plate 4 in the vertical direction. In this embodiment, the width of the pressing portion 4a is greater than that of the synchronous belt accommodating cavity 3, and the width of the meshing portion 4b is equal to that of the synchronous belt accommodating cavity 3; in other embodiments, the widths of the engaging portion 4b and the pressing portion 4a may be equal to the width of the timing belt accommodating chamber 3; or the meshing part 4b is smaller than the width of the timing belt accommodating cavity 3, and the width of the pressing part 4a is equal to the width of the timing belt accommodating cavity 3. The width of the pressing part 4a is larger than that of the meshing part 4b, so that the pressure of the set screw 5 can be uniformly pressed on the synchronous belt, the pressing part 4a can be filed for increasing and adjusting the pre-pressure, and pressing plate parts with different pre-pressures can be produced for replacement, so that the maximum pre-pressure can be selected.

As shown in fig. 1 to 8, the end connection device of the synchronous belt may be applied to a length adjustment device of a synchronous belt, including a connection plate 6, the connection plate 6 including a longitudinal connection plate 6a and a vertical connection plate 6b integrally, and specifically, the connection plate 6 including a longitudinal connection plate 6a and a vertical connection plate 6b integrally, the longitudinal connection plate 6a being disposed on the upper surfaces of a first synchronous belt connection device 100 and a second synchronous belt connection device 200, and the vertical connection plate 6b being disposed on the outer side surface of the first synchronous belt connection device 100 or the second synchronous belt connection device 200 in the longitudinal direction;

a first timing belt connecting device 100 and a second timing belt connecting device 200 are provided below the longitudinal connecting plate 6a, and the first timing belt connecting device 100 and the second timing belt connecting device 200 have the same structure as the aforementioned timing belt end connecting device.

In this embodiment, the second synchronous belt connecting device 200 is connected to the longitudinal connecting plate 6a in a longitudinally movable manner; in other embodiments, the first synchronous belt connecting device 100 may be connected to the longitudinal connecting plate 6a in a longitudinally movable manner.

As shown in fig. 7, a tensioning screw 7 is arranged on the vertical connecting plate 6b, in this embodiment, a screw end surface of the tensioning screw 7 abuts against a base of the second synchronous belt connecting device 200 and a side surface far away from the first synchronous belt connecting device 100, and specifically, the screw end surface of the tensioning screw 7 abuts against the base of the first synchronous belt connecting device 100 and the side surface far away from the second synchronous belt connecting device 200; in use, the tension of the timing belt is performed by rotating the tension screw 7. In other embodiments, the vertical connecting plate 6b and the tensioning screw 7 may not be provided, and the bases of the first and second synchronous belt connecting devices are pulled toward the middle by hand or other auxiliary devices during connection, and then the compression screw 9 is tightened for fixing.

In order to facilitate the adjustment and fixing of the position of the second synchronous belt connection device 200 on the vertical connection plate 6b, a strip-shaped hole 8 is formed in the longitudinal connection plate 6a, and the length of the strip-shaped hole 8 represents the tensioning amount of the adjustable synchronous belt. And the compression screw 9 passes through the strip-shaped hole 8 and then is connected with the base of the second synchronous belt connecting device 200.

Specifically, the longitudinal connecting plate 6a includes a first synchronous belt connecting device connecting portion and a second synchronous belt connecting device connecting portion; two fixing screw mounting holes 6a1 are formed in the connecting part of the first synchronous belt connecting device along the longitudinal direction, the centers of the two fixing screw mounting holes 6a1 are located on the same straight line, a fixing screw 10 is in clearance fit with the fixing screw mounting hole 6a1, and the longitudinal connecting plate 6a and the first synchronous belt connecting device 100 are fixed in parallel in a two-point straight line fixing mode; simultaneously, bar hole 8 is located second hold-in range connecting device connecting portion, and bar hole 8 is provided with two altogether in this embodiment, and two bar holes 8 and housing screw 9 are at transverse direction clearance fit, and the straight line at the center place of a plurality of set screw mounting holes that set up along longitudinal direction on bar hole central line and the first hold-in range connecting device is parallel. The hold-down screws 9 can slide in parallel relative to the strip-shaped holes 8, so that two ends of the synchronous belt are positioned on the same straight line, and the transmission of the tension is facilitated. In other embodiments, one, three or more strip-shaped holes 8 may be provided.

In other embodiments, a first guide groove may be formed on the first synchronous belt connecting device 100, a second guide groove may be formed on the second synchronous belt connecting device 200 corresponding to the first guide groove, and the first guide groove and the second guide groove are engaged with the lower portion of the longitudinal connecting plate 6a, so that the longitudinal connecting plate 6a is located in the first guide groove and the second guide groove, and the two ends of the synchronous belt are ensured to be in the same straight line.

In other embodiments, a similar structure may be provided at one side of the first synchronous belt connecting device 100, so that the first synchronous belt connecting device 100 can also adjust the tension amount of the synchronous belt.

As shown in fig. 7, in order to adjust the tension, the first synchronous belt connecting device 100 is connected to the longitudinal connecting plate 6a through a fixing screw 10, the second synchronous belt connecting device 200 is connected to the longitudinal connecting plate 6a through a compression screw 9, and a screw end surface of the tension screw 7 abuts against a side surface of the second synchronous belt connecting device 200 on the base and away from the first synchronous belt connecting device 100; when the synchronous belt is tensioned, the tensioning screw 7 is rotated to enable the second synchronous belt connecting device 200 to be close to the first synchronous belt connecting device 100, the synchronous belt is tensioned, and after tensioning is completed, the compression screw 9 is screwed down to be fixed. In other embodiments without the vertical connecting plate 6b and the tensioning screw 7, the bases of the first and second synchronous belt connecting devices can be pulled towards the middle by hands or other auxiliary devices when in use, and then the compression screw 9 is tightened for fixing.

As shown in fig. 1 to 8, the aforementioned synchronous belt length adjusting device can be applied to a synchronous belt length adjusting structure, which is suitable for a case where a synchronous pulley rotates by a limited angle, that is, a fixed distance reciprocating motion of the synchronous belt on a driving pulley and a driven pulley.

In the length adjusting structure of the synchronous belt, a pressure plate of a first synchronous belt connecting device 100 is meshed with one end of a synchronous belt 11, a set screw 5 in the synchronous belt connecting device compresses a pressure plate 4, so that the lower surface of a compressing part 4a is tightly attached to the lower surface of a pressure plate accommodating cavity; the distance between the lower surface of the pressing part 4a and the lower surface of the pressing plate accommodating cavity can be controlled through the rotation degree of the set screw 5 in the process, and the adjustment of the pressing amount is realized.

The pressing plate of the second synchronous belt connecting device 200 is engaged with the other end of the synchronous belt 11, the pressing plate is pressed by the set screw 5 in the second synchronous belt connecting device, the lower surface of the pressing part 4a is tightly attached to the lower surface of the holding cavity of the pressing plate, and the pressing amount in the process can be regulated and controlled through the rotation degree of the set screw 5.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.