Tensioning device for chain wheel transmission

Abstract

The utility model discloses a tensioning device for chain wheel transmission, which belongs to the technical field of chain transmission accessories and comprises a rack, a transmission chain, a motor, a first tensioning piece and a second tensioning piece, and the motor, the first tensioning piece and the second tensioning piece are arranged on the rack. One end of each of the first tensioning piece and the second tensioning piece is elastically connected with the rack; the transmission chain sequentially passes through the first tensioning piece, a transmission shaft of the motor and the second tensioning piece in a winding mode, and the first tensioning piece and the second tensioning piece can move relatively. After a worker adjusts the initial angles of the first tensioning piece and the second tensioning piece, the positions of the first tensioning piece and the second tensioning piece which are elastically connected with the rack can be automatically adjusted according to stress changes of the transmission chain, and therefore it is guaranteed that the transmission chain can be tightly attached to a transmission shaft of a motor, and the overall transmission efficiency is improved; therefore, the problem that the transmission effect is poor or equipment is damaged due to the fact that the tensioning degree of the tensioning piece cannot be controlled is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chain transmission accessories, and particularly relates to a tensioning device used for sprocket wheel transmission. Background Art

[0002] In a flexible transmission system, in order to ensure the transmission efficiency between the transmission wheels, it is usually necessary to additionally provide a corresponding tensioning device to improve the fit between the multiple transmission wheels and the intermediate annular flexible member, thereby effectively improving the transmission efficiency between the transmission wheels.

[0003] Existing tensioning devices are generally made of specific elastic materials such as tension springs and rubber, and the purpose of tensioning is achieved through a certain structural design by utilizing the elastic force of the spring or rubber.

[0004] However, in actual use, it was found that this type of tensioning device has the following problems:

[0005] 1) Rubber and tension spring tensioning devices have limited elasticity and cannot meet the needs of large-stroke expansion and contraction. Rubber and tension springs have the problems of aging and elastic failure, respectively, which easily leads to the risk of loss of elasticity.

[0006] 2) The tensioning arm of the tensioning device is often made of a single plate, which is prone to deformation, and only one end of the tensioning wheel is fixed on the tensioning arm, which can easily cause uneven force on the tensioning wheel and cause the rolling bearing in the tensioning wheel to be easily damaged.

[0007] 3) The fixed fulcrum of the tensioning arm is fixed with bolts, which results in the movement of the tensioning arm being restricted by the bolts; when the bolts are tightened, the tensioning arm cannot rotate, so it cannot automatically adjust the tensioning degree according to the change in force; when the bolts are loose, the tensioning arm will shake and become unstable, which may easily damage other parts. Utility Model Content

[0008] The technical problem to be solved by the utility model is: how to provide a tensioning device for sprocket transmission which can ensure the tensioning performance and thus improve the transmission efficiency.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0010] A tensioning device for sprocket drive, comprising a frame, a transmission chain, and a motor, a first tensioning member and a second tensioning member arranged on the frame;

[0011] The first tensioning member and the second tensioning member both have one end elastically connected to the frame;

[0012] The transmission chain passes through the first tensioning member, the transmission shaft of the motor and the second tensioning member in sequence around the label, and the first tensioning member and the second tensioning member can move relative to each other.

[0013] Further, it also includes an elastic torsion spring;

[0014] The first tensioning member includes a first tensioning arm and a first tensioning wheel;

[0015] The second tensioning member includes a second tensioning arm and a second tensioning wheel;

[0016] A driving wheel is provided on the transmission shaft of the motor;

[0017] A first tensioning wheel is hingedly connected to one end of the first tensioning arm in the length direction;

[0018] A second tensioning wheel is hingedly connected to one end of the second tensioning arm in the length direction;

[0019] The other end of the first tensioning arm in the length direction and the other end of the second tensioning arm in the length direction are elastically connected to the frame through an elastic torsion spring;

[0020] The transmission chain passes through the first tension wheel, the driving wheel and the second tension wheel in sequence around the mark.

[0021] Furthermore, one end of the first tensioning member in the length direction and one end of the second tensioning arm in the length direction are both provided with a clamping groove;

[0022] Both end surfaces of the first tensioning wheel and both end surfaces of the second tensioning wheel are hinged to the side walls of the corresponding clamping grooves.

[0023] Further, when the first tension wheel and the second tension wheel are in an initial state, a minimum distance between an outer circumferential surface of the first tension wheel and an outer circumferential surface of the second tension wheel is less than or equal to a diameter of the driving wheel.

[0024] Further, it also includes a rotating shaft;

[0025] The other end of the first tensioning arm in the length direction and the other end of the second tensioning arm in the length direction are both hinged to the frame through a rotating shaft;

[0026] The elastic torsion spring is sleeved on the outer side of the rotating shaft and elastically connected to the frame;

[0027] The axis of the rotating shaft and the axis of the driving wheel are parallel to each other.

[0028] Further, it also includes a height adjustment column;

[0029] The height adjustment column is hinged to an end of the first tensioning arm away from the first tensioning wheel, or an end of the second tensioning member away from the second tensioning wheel.

[0030] Furthermore, along the length direction of the height adjustment column, at least two hinge holes are provided on the height adjustment column;

[0031] One end of the first tensioning arm away from the first tensioning wheel, or one end of the second tensioning member away from the second tensioning wheel, is hinged to the height adjustment column through a hinge hole.

[0032] The beneficial effect of the utility model is that the tensioning device for sprocket transmission provided by the utility model, after the staff adjusts the initial angles of the first tensioning member and the second tensioning member, the first tensioning member and the second tensioning member elastically connected to the frame can automatically adjust their positions according to the force changes of the transmission chain, thereby ensuring that the transmission chain can be close to the transmission shaft of the motor to improve the overall transmission efficiency; thereby avoiding the problem of poor transmission effect or damage to equipment due to the inability to control the tensioning degree of the tensioning member. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Shown is a tensioning device for sprocket drive according to a specific embodiment of the utility model;

[0034] Figure 2 Shown is an enlarged view of point A in the figure;

[0035] Description of labels:

[0036] 1. Frame;

[0037] 2. Transmission chain;

[0038] 3. Motor; 31. Driving wheel;

[0039] 4. first tensioning member; 41. first tensioning arm; 42. first tensioning wheel;

[0040] 5. second tensioning member; 51. second tensioning arm; 52. second tensioning wheel;

[0041] 6. Elastic torsion spring;

[0042] 7. Height adjustment column; 71. Hinge hole;

[0043] 8. Pre-positioning hole;

[0044] 9. Pin hole. DETAILED DESCRIPTION

[0045] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0046] The most critical concept of the utility model is that after adjusting the initial angles of the first tensioning member and the second tensioning member, the first tensioning member and the second tensioning member elastically connected to the frame can automatically adjust their positions according to the force changes of the transmission chain, thereby ensuring that the transmission chain can be close to the transmission shaft of the motor to improve the overall transmission efficiency; thereby avoiding the problem of poor transmission effect or damage to equipment due to uncontrollable tensioning degree.

[0047] Please refer to Figure 1 to Figure 2 The tensioning device for sprocket drive provided by the utility model comprises a frame 1, a transmission chain 2, and a motor 3, a first tensioning member 4 and a second tensioning member 5 arranged on the frame 1;

[0048] One end of the first tensioning member 4 and the second tensioning member 5 are elastically connected to the frame 1;

[0049] The transmission chain 2 passes through the first tensioning member 4, the transmission shaft of the motor 3 and the second tensioning member 5 in sequence around the label, and the first tensioning member 4 and the second tensioning member 5 can move relative to each other.

[0050] From the above description, it can be seen that the beneficial effects of the utility model are: providing a tensioning device for sprocket transmission, when the staff adjusts the initial angles of the first tensioning member 4 and the second tensioning member 5, the first tensioning member 4 and the second tensioning member 5 elastically connected to the frame 1 can automatically adjust their positions according to the force changes of the transmission chain 2, thereby ensuring that the transmission chain 2 can be close to the transmission shaft of the motor 3 to improve the overall transmission efficiency; compared with the existing tensioning device, it can not only avoid the problem of poor transmission effect or damage to equipment due to the inability to control the tensioning degree of the tensioning member; it can also prevent the use of rubber or tension springs as elastic members, which may cause the expansion and contraction amount to fail to meet actual needs or lose elasticity due to aging, thereby affecting normal transmission work.

[0051] Furthermore, the above-mentioned tensioning device for sprocket transmission further includes an elastic torsion spring 6;

[0052] The first tensioning member 4 comprises a first tensioning arm 41 and a first tensioning wheel 42;

[0053] The second tensioning member 5 comprises a second tensioning arm 51 and a second tensioning wheel 52;

[0054] A driving wheel 31 is provided on the transmission shaft of the motor 3;

[0055] A first tensioning wheel 42 is hingedly connected to one end of the first tensioning arm 41 in the length direction;

[0056] A second tensioning wheel 52 is hingedly connected to one end of the second tensioning arm 51 in the length direction;

[0057] The other end of the first tensioning arm 41 in the length direction and the other end of the second tensioning arm 51 in the length direction are elastically connected to the frame 1 through an elastic torsion spring 6;

[0058] The transmission chain 2 passes through the first tensioning wheel 42, the driving wheel 31 and the second tensioning wheel 52 in sequence around the mark.

[0059] Specifically, the first tensioning arm 41 and the second tensioning arm 51 are both bent plates, such as channel steels, which can improve the bending strength of the first tensioning member 4 and the second tensioning member 5, thereby extending the service life of the equipment.

[0060] From the above description, it can be seen that the design has made specific improvements to the component structure of the tensioning device, as well as the component structure of the first tensioning member 4 and the second tensioning member 5, so as to provide structural support for the first tensioning member 4 and the second tensioning member 5 to automatically adjust their positions according to the force changes of the transmission chain 2, so as to improve the overall transmission efficiency.

[0061] Furthermore, one end of the first tensioning member 4 in the length direction and one end of the second tensioning arm 51 in the length direction are both provided with a clamping groove;

[0062] Both end surfaces of the first tensioning wheel 42 and both end surfaces of the second tensioning wheel 52 are hinged to the side walls of the corresponding clamping grooves.

[0063] From the above description, it can be seen that this design ensures that both ends of the first tensioning wheel 42 and both ends of the second tensioning wheel 52 can be evenly stressed, avoiding the possibility of deformation of the first tensioning wheel 42 or the second tensioning wheel 52 at the hinge due to unilateral stress, thereby requiring frequent replacement of corresponding parts, which not only affects the working efficiency of the equipment, but also increases the additional cost of equipment use.

[0064] Further, when the first tensioning wheel 42 and the second tensioning wheel 52 are in the initial state, the minimum distance between the outer circumferential surface of the first tensioning wheel 42 and the outer circumferential surface of the second tensioning wheel 52 is less than or equal to the diameter of the driving wheel 31 .

[0065] From the above description, it can be seen that the design has made specific improvements to the positional relationship between the first tensioning member 4 and the second tensioning member 5, ensuring that after the transmission chain 2 completes the winding of the label, the transmission chain 2 can be tightly attached to the outer cylindrical surface of the driving wheel 31 under the action of the first tensioning member 4 and the second tensioning member 5, thereby providing a guarantee for improving the overall transmission efficiency.

[0066] Furthermore, the above-mentioned tensioning device for sprocket drive also includes a rotating shaft;

[0067] The other end of the first tensioning arm 41 in the length direction and the other end of the second tensioning arm 51 in the length direction are both hinged to the frame 1 through a rotating shaft;

[0068] The elastic torsion spring 6 is sleeved on the outer side of the rotating shaft and elastically connected to the frame 1;

[0069] The axis of the rotating shaft and the axis of the driving wheel 31 are parallel to each other.

[0070] From the above description, it can be seen that the design further optimizes the elastic connection structure between the frame 1 and the first tensioning member 4 and the second tensioning member 5, and sets the corresponding rotating axis, which can effectively limit the rotation direction of the first tensioning member 4 and the second tensioning member 5; avoid the first tensioning member 4 and the second tensioning member 5 being unrestricted in their rotation direction when subjected to external force, thereby preventing the transmission chain 2 from being derailed, thereby affecting the normal operation of the equipment.

[0071] Furthermore, the above-mentioned tensioning device for sprocket drive further includes a height adjustment column 7;

[0072] The height adjustment column 7 is hinged to an end of the first tensioning arm 41 away from the first tensioning wheel 42 , or an end of the second tensioning member 5 away from the second tensioning wheel 52 .

[0073] Furthermore, along the length direction of the height adjustment column 7, at least two hinge holes 71 are provided on the height adjustment column 7;

[0074] One end of the first tensioning arm 41 away from the first tensioning wheel 42 , or one end of the second tensioning member 5 away from the second tensioning wheel 52 , is hinged to the height adjustment column 7 through a hinge hole 71 .

[0075] Specifically, the first tensioning arm 41 and the second tensioning arm 51 are both provided with a pre-positioning hole 8, and the frame 1 and the height adjustment column 7 are both provided with a pin hole 9 that matches the pre-positioning hole 8; when installing the transmission chain 2, first rotate the tensioning arm to align the pre-positioning hole 8 on the tensioning arm with the corresponding pin hole 9, and then lock the tensioning arm to the frame 1 or the height adjustment column 7 through any fixing part (such as a pin) to keep the tensioning arm stationary, so that the transmission chain 2 can more conveniently pass through the first tensioning wheel 42, the driving wheel 31 and the second tensioning wheel 52 in turn; when the transmission chain 2 is installed, pull out the fixing part, and the tensioning arm can restore the initial state under the action of the elastic torsion spring 6, thereby ensuring that the driving wheel 31 of the transmission chain 2 is tightly fitted to improve the overall transmission effect.

[0076] From the above description, it can be seen that the design has made further improvements to the specific structure of the tensioning device. By setting a height adjustment column 7, the staff can adjust the position of the first tensioning member 4 or the second tensioning member 5 according to actual needs, so that the tensioning degree of the first tensioning member 4 and the second tensioning member 5 on the transmission chain 2 can reach the optimal state, thereby providing structural support for improving the overall transmission efficiency.

[0077] The tensioning device for sprocket drive of the utility model can be combined with various flexible transmission systems to assist in tensioning work.

[0078] Please refer to Figure 1 to Figure 2 , Embodiment 1 of the present utility model is:

[0079] A tensioning device for sprocket drive includes a frame 1, a transmission chain 2, an elastic torsion spring 6, a rotating shaft, a height adjustment column 7, and a motor 3, a first tensioning member 4 and a second tensioning member 5 arranged on the frame 1; the first tensioning member 4 and the second tensioning member 5 both have one end elastically connected to the frame 1; the transmission chain 2 passes through the first tensioning member 4, the transmission shaft of the motor 3 and the second tensioning member 5 in sequence, and the first tensioning member 4 and the second tensioning member 5 can move relative to each other.

[0080] The first tensioning member 4 includes a first tensioning arm 41 and a first tensioning wheel 42; the second tensioning member 5 includes a second tensioning arm 51 and a second tensioning wheel 52; a driving wheel 31 is provided on the transmission shaft of the motor 3; one end of the first tensioning arm 41 in the length direction is hinged to the first tensioning wheel 42; one end of the second tensioning arm 51 in the length direction is hinged to the second tensioning wheel 52; the other end of the first tensioning arm 41 in the length direction and the other end of the second tensioning arm 51 in the length direction are elastically connected to the frame 1 through an elastic torsion spring 6; the transmission chain 2 passes through the first tensioning wheel 42, the driving wheel 31 and the second tensioning wheel 52 in sequence around the mark; one end of the first tensioning member 4 in the length direction and the second tensioning arm 51 in the length direction are hinged to the second tensioning wheel 52 One end of the arm 51 in the length direction is provided with a clamping groove; the two end surfaces of the first tensioning wheel 42 and the two end surfaces of the second tensioning wheel 52 are hinged to the side walls of the corresponding clamping groove; when the first tensioning wheel 42 and the second tensioning wheel 52 are in the initial state, the minimum distance between the outer cylindrical surface of the first tensioning wheel 42 and the outer cylindrical surface of the second tensioning wheel 52 is less than or equal to the diameter of the driving wheel 31; the other end of the first tensioning arm 41 in the length direction and the other end of the second tensioning arm 51 in the length direction are hinged to the frame 1 through the rotating shaft; the elastic torsion spring 6 is sleeved on the outside of the rotating shaft and is elastically connected to the frame 1; the axis of the rotating shaft and the axis of the driving wheel 31 are parallel to each other.

[0081] The height adjustment column 7 is hinged to the end of the first tensioning arm 41 away from the first tensioning wheel 42, or the end of the second tensioning member 5 away from the second tensioning wheel 52; along the length direction of the height adjustment column 7, at least two hinge holes 71 are provided on the height adjustment column 7; the end of the first tensioning arm 41 away from the first tensioning wheel 42, or the end of the second tensioning member 5 away from the second tensioning wheel 52 is hinged to the height adjustment column 7 through the hinge hole 71.

[0082] The working principle of the utility model is as follows: first, the staff adjusts the positions of the first tensioning member 4 and the second tensioning member 5 according to the actual tensioning degree requirements; then, the transmission chain 2 is wound around the first tensioning wheel 42, the driving wheel 31 and the second tensioning wheel 52 in sequence; when the transmission system is started, the first tensioning member 4 and the second tensioning member 5 can automatically adjust the positions between the first tensioning wheel 42 and the second tensioning wheel 52 and the driving wheel 31 according to the tightness of the transmission chain 2, so that the transmission chain 2 can always be close to the driving wheel, thereby ensuring that the overall transmission efficiency can meet the design requirements.

[0083] To sum up, the utility model provides a tensioning device for sprocket transmission. After the staff adjusts the initial angles of the first tensioning member and the second tensioning member, the first tensioning member and the second tensioning member elastically connected to the frame can automatically adjust their positions according to the force changes of the transmission chain, thereby ensuring that the transmission chain can be close to the transmission shaft of the motor to improve the overall transmission efficiency; compared with the existing tensioning device, it can not only avoid the problem of poor transmission effect or damage to the equipment due to the inability to control the tensioning degree of the tensioning member; it can also prevent the situation where the expansion amount cannot meet the actual needs or the elasticity is lost due to aging when rubber or tension springs are used as elastic members, thereby affecting the normal transmission work; at the same time, the first tensioning member and the second tensioning member are hinged to the frame through a rotating shaft, which can effectively limit the rotation direction of the first tensioning member and the second tensioning member; avoid the problem of the first tensioning member and the second tensioning member being decoupled from the transmission chain due to the unrestricted rotation direction when being subjected to external force, thereby affecting the normal operation of the equipment.

[0084] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A tensioning device for a sprocket drive, characterized in that: It comprises a frame, a transmission chain, and a motor, a first tensioning member and a second tensioning member arranged on the frame; The first tensioning member and the second tensioning member both have one end elastically connected to the frame; The transmission chain passes through the first tensioning member, the transmission shaft of the motor and the second tensioning member in sequence around the label, and the first tensioning member and the second tensioning member can move relative to each other.

2. The tensioning device for sprocket drive according to claim 1, characterized in that: Also included is an elastic torsion spring; The first tensioning member includes a first tensioning arm and a first tensioning wheel; The second tensioning member includes a second tensioning arm and a second tensioning wheel; A driving wheel is provided on the transmission shaft of the motor; A first tensioning wheel is hingedly connected to one end of the first tensioning arm in the length direction; A second tensioning wheel is hingedly connected to one end of the second tensioning arm in the length direction; The other end of the first tensioning arm in the length direction and the other end of the second tensioning arm in the length direction are elastically connected to the frame through an elastic torsion spring; The transmission chain passes through the first tension wheel, the driving wheel and the second tension wheel in sequence around the mark.

3. The tensioning device for sprocket drive according to claim 2, characterized in that: One end of the first tensioning member in the length direction and one end of the second tensioning arm in the length direction are both provided with a clamping groove; Both end surfaces of the first tensioning wheel and both end surfaces of the second tensioning wheel are hinged to the side walls of the corresponding clamping grooves.

4. The tensioning device for sprocket drive according to claim 2, characterized in that: When the first tension wheel and the second tension wheel are in an initial state, the minimum distance between the outer circumferential surface of the first tension wheel and the outer circumferential surface of the second tension wheel is less than or equal to the diameter of the driving wheel.

5. The tensioning device for sprocket drive according to claim 2, characterized in that: Also includes a rotation axis; The other end of the first tensioning arm in the length direction and the other end of the second tensioning arm in the length direction are both hinged to the frame through a rotating shaft; The elastic torsion spring is sleeved on the outside of the rotating shaft and elastically connected to the frame; The axis of the rotating shaft and the axis of the driving wheel are parallel to each other.

6. The tensioning device for sprocket drive according to claim 2, characterized in that: Also included are height-adjustable uprights; The height adjustment column is hinged to an end of the first tensioning arm away from the first tensioning wheel, or an end of the second tensioning member away from the second tensioning wheel.

7. The tensioning device for sprocket drive according to claim 6, characterized in that: At least two hinge holes are provided on the height adjustment column along the length direction of the height adjustment column; One end of the first tensioning arm away from the first tensioning wheel, or one end of the second tensioning member away from the second tensioning wheel, is hinged to the height adjustment column through a hinge hole.

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