CN211643573U - Step feeder with variable step length - Google Patents

Abstract

The utility model provides a stepping feeder with variable step length, belonging to the field of conveying equipment, comprising a frame, a conveyor belt, a one-way ratchet, a sliding piece, a plurality of meshing modules and a telescopic unit. The conveyor belt is arranged on the frame and has a drive shaft. The one-way ratchet is arranged on the drive shaft. The sliding member is arranged on the frame to reciprocately slide in the forward and reverse directions. A plurality of engaging modules are respectively detachably arranged on the slider and distributed along the sliding direction of the slider. Each engaging module is rotated with a ratchet, and the ratchet is used to connect with the one-way ratchet when the slider is sliding in the forward direction. Engaged and disengaged from the one-way ratchet when the slider slides in reverse. The telescopic unit is arranged on the frame and is used to drive the sliding member to reciprocate. In the variable step-length stepping feeder of the utility model, the telescopic unit drives the conveyor belt to carry out step-by-step conveying through the cooperation of the ratchet teeth and the one-way ratchet. The structure is compact, and can be adjusted by increasing or decreasing the number of meshing modules on the sliding piece step size to meet the actual needs.

Description

Variable-step stepper feeder

technical field

The utility model belongs to the technical field of conveying equipment, and more particularly relates to a stepping feeder with variable step length.

Background technique

A stepper feeder is a conveying device that intermittently conveys materials in steps. Most of the existing stepping feeders adopt a structure in which the feeding part is driven by a link mechanism to reciprocate, so as to realize intermittent stepping feeding. However, this kind of stepping feeder has a large volume of the whole machine due to the large volume of the connecting rod mechanism, and the structure of the feeding part is quite different from that of the traditional continuous feeder, so special design is required to realize the reciprocation. Exercise is expensive. Now there is a stepping feeder driven by a ratchet structure, but the step length of this stepping feeder cannot be adjusted, and it is difficult to meet the actual needs.

Utility model content

The purpose of this utility model is to provide a step-by-step feeder with variable step length, so as to solve the technical problem that the step-length cannot be adjusted and it is difficult to meet the actual needs of the step-by-step feeder driven by the ratchet structure in the prior art. question.

In order to achieve the above purpose, the technical solution adopted by the present utility model is to provide a step feeder with a variable step length, including:

frame;

a conveyor belt, arranged on the frame, with a drive shaft;

a one-way ratchet, arranged on the drive shaft;

A sliding member is arranged on the frame to reciprocate along the forward and reverse directions;

A plurality of engaging modules are respectively detachably arranged on the sliding member and distributed along the sliding direction of the sliding member, and each of the engaging modules is rotatably provided with a ratchet, and the ratchet is used for The slider is engaged with the one-way ratchet when the slider is sliding forward, and is disengaged from the one-way ratchet when the slider is reversely sliding; and

The telescopic unit is arranged on the frame and is used for driving the sliding member to slide back and forth.

As another embodiment of the present application, the sliding member is provided with a long adjustment hole, the long axis of the adjustment hole is parallel to the sliding direction of the sliding member, and the adjustment hole is provided with a plurality of A connecting piece with an adjustable position of the long axis of the adjustment hole, and a plurality of the engaging modules are respectively connected with the plurality of the connecting pieces.

As another embodiment of the present application, the sliding member is provided with a support block, the support block is located on the opposite side of the engagement module, and a retractable abutment member is provided on the support block, and the support block is provided with a retractable abutting member. The connecting piece is in abutment with the engaging module for restricting the reverse movement of the engaging module relative to the abutting piece.

As another embodiment of the present application, the engagement module includes a base with an accommodating groove, and the shaft end of the ratchet tooth is located in the accommodating groove; when the tooth end of the ratchet tooth is engaged with the one-way ratchet wheel , the inner wall of the opposite side of the accommodating groove is in contact with the ratchet to limit the rotation of the ratchet.

As another embodiment of the present application, an elastic member is provided between the groove bottom of the accommodating groove and the tooth end of the ratchet tooth, and the elastic member is used to push the tooth end of the ratchet tooth to approach the one-way ratchet wheel swing.

As another embodiment of the present application, the engagement module is located above the one-way ratchet, and the tooth ends of the ratchet teeth hang down to engage with the one-way ratchet.

As another embodiment of the present application, the rack is provided with a backboard, the sliding member is located between the backboard and the one-way ratchet, and the back of the sliding member is connected to the surface of the backboard. Sliding fit, the engaging module is arranged on the front of the sliding piece; the frame is also provided with a guide clamp block, and a guide groove for accommodating the slider is formed between the guide clamp block and the back plate .

As another embodiment of the present application, an adjustment structure is provided between the telescopic end of the telescopic unit and the sliding member, and the adjustment structure is used to adjust the position of the sliding member relative to the telescopic end of the telescopic unit in the The position of the slider in the sliding direction.

As another embodiment of the present application, the adjustment structure includes:

The first screw is arranged on the telescopic end of the telescopic unit;

a second screw rod, disposed on the sliding member, the axis of which is collinear with the axis of the first screw rod, and the thread rotation direction is opposite to that of the first screw rod; and

The two ends of the adjusting sleeve are respectively connected with the first screw rod and the second screw screw thread.

As another embodiment of the present application, the frame includes two side frames arranged opposite to each other, the conveyor belt is arranged between the two side frames, and the drive shaft passes through the two side frames, so The one-way ratchet is located outside the two side frames and is detachably connected with the drive shaft.

The beneficial effect of the variable step length stepping feeder provided by the embodiment of the present utility model is that compared with the prior art, the variable step length stepping feeder of the present utility model embodiment adopts a conveyor belt to convey materials , can use the same conveyor belt as the traditional continuous feeder, no special design is required, and the cost is reduced. The telescopic unit is used to drive the sliding member to reciprocate. When the sliding member is sliding forward, the sliding member drives the conveyor belt to convey through the engagement of the ratchet teeth and the one-way ratchet. It will return, so as to realize step-by-step feeding, the structure is more compact, and the volume of the whole machine is smaller. In addition, by increasing or decreasing the number of meshing modules on the sliding piece, the angle at which the reciprocating motion of the sliding piece drives the ratchet wheel to rotate once, and then the distance of the single conveying of the conveyor belt can be changed, so as to realize the adjustment of the step size of the stepper feeder with variable step size. meet actual needs.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present utility model. For some novel embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a front view of a stepper feeder with variable step length provided by an embodiment of the present utility model;

Fig. 2 is the enlarged view of A place in Fig. 1;

Fig. 3 is the top view of Fig. 1;

FIG. 4 is a top view of the slider of FIG. 1 .

Among them, each reference sign in the figure:

1-frame; 11-back plate; 12-guide clamp; 13-side frame; 2-conveyor; 3-one-way ratchet; 4-slider; 41-adjustment hole; 42-connector; 43-support block ; 44- abutting piece; 45- second screw rod; 5- engaging module; 51- base; 52- receiving groove; 53- ratchet tooth; 54- elastic piece; 6- telescopic unit; -Adjustment sleeve.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

Please refer to FIG. 1 to FIG. 4 together, and now the variable step feeder provided by the embodiment of the present invention will be described. A stepping feeder with variable step length includes: a frame 1 , a conveyor belt 2 , a one-way ratchet 3 , a sliding member 4 , a plurality of engaging modules 5 and a telescopic unit 6 .

The conveyor belt 2 is arranged on the frame 1 and has a drive shaft. The one-way ratchet 3 is arranged on the drive shaft. The sliding member 4 is arranged on the frame 1 to reciprocately slide in the forward and reverse directions. A plurality of engaging modules 5 are respectively detachably arranged on the slider 4 and distributed along the sliding direction of the slider 4. Each engaging module 5 is rotatably provided with a ratchet tooth 53, and the ratchet teeth 53 are used for locating the slider 4 at the correct position. It engages with the one-way ratchet wheel 3 when sliding in the opposite direction, and separates from the one-way ratchet wheel 3 when the sliding member 4 slides in the reverse direction. The telescopic unit 6 is arranged on the frame 1 and is used to drive the sliding member 4 to slide back and forth.

Compared with the prior art, the variable-step stepping feeder according to the embodiment of the present invention adopts the conveyor belt 2 for material conveying, and can use the same conveyor belt 2 as the traditional continuous feeder, without special design, reducing the need for special design. cost. The telescopic unit 6 is used to drive the sliding member 4 to reciprocate. When the sliding member 4 slides in the forward direction, the sliding member 4 drives the conveyor belt 2 to convey through the engagement of the ratchet teeth 53 and the one-way ratchet wheel 3. When the sliding member 4 slides in the reverse direction, the ratchet teeth 53 is separated from the one-way ratchet 3, and the conveyor belt 2 will not return, so as to realize step-by-step feeding, the structure is more compact, and the volume of the whole machine is smaller. In addition, by increasing or decreasing the number of meshing modules 5 on the sliding member 4, the reciprocating motion of the sliding member 4 can change the angle at which the ratchet wheel rotates once, thereby changing the single conveying distance of the conveyor belt 2, so as to realize a stepping feeder with adjustable step length. step size to meet the actual needs.

In this embodiment, the frame 1 may be a frame structure made of steel members, and the conveyor belt 2 is horizontally installed on the upper part of the frame 1 . The conveyor belt 2 may include driving rollers and driven rollers arranged in parallel opposite to each other, and a belt body surrounding the driving rollers and the driven rollers. The rotating shaft at one end of the driving roller forms the driving shaft, and the driving shaft drives the belt body to rotate through the driving roller, thereby conveying the material on the belt body. The driving roller and the driven roller are respectively arranged on both ends of the frame 1 to rotate. The belt body can be a flexible belt, a metal mesh belt, or a chain plate formed by a plurality of metal plates hinged in sequence.

In this embodiment, the sliding member 4 is driven by the telescopic unit 6 to reciprocate on the frame 1 along the horizontal forward and reverse directions. When the sliding member 4 slides forwardly, the ratchet teeth 53 on the meshing module 5 and the one-way ratchet wheel 3 meshes to drive the drive shaft to rotate, so that the conveyor belt 2 transports the material backwards. The number of engaging modules 5 on the sliding member 4 determines the number of times the one-way ratchet 3 rotates during the forward sliding of the sliding member 4 once. For example, when the slider 4 is provided with two engaging modules 5, the slider 4 slides forward once, and the ratchet teeth 53 on the two engaging modules 5 engage with the one-way ratchet 3 in turn, driving the one-way ratchet 3 to rotate twice; When the slider 4 is provided with three engaging modules 5, the slider 4 slides forward once, and the ratchet teeth 53 on the three engaging modules 5 engage with the one-way ratchet 3 in turn, driving the one-way ratchet 3 to rotate three times. When the sliding member 4 slides in the reverse direction, the ratchet teeth 53 on the engaging module 5 are separated from the one-way ratchet wheel 3, and the conveying belt 2 stops conveying, so that the conveying belt 2 realizes the step-by-step conveying.

Specifically, the sliding member 4 is a long straight rod or a long strip. The sliding member 4 may be disposed on the frame 1 slidably along its own axial direction. The sliding member 4 can be installed on the rack 1 through the structure of the sliding rail and the slider, or a chute can be provided on the rack 1. on rack 1. The engaging module 5 can be detachably connected to the sliding member 4 through bolts. The engaging module 5 may include a base 51 and a ratchet 53 hinged on the base 51 , and the base 51 is detachably connected to the sliding member 4 through bolts. The telescopic unit 6 may be an oil cylinder or an air cylinder, and the telescopic unit 6 may be disposed coaxially with the sliding member 4 to drive the sliding member 4 to reciprocate along its own axis.

Please refer to FIG. 2 and FIG. 4 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, the sliding member 4 is provided with a long adjustment hole 41 , and the long axis of the adjustment hole 41 is the same as the The sliding direction of the sliding member 4 is parallel, the adjusting hole 41 is provided with a plurality of connecting members 42 whose positions are adjustable along the long axis of the adjusting hole 41 , and the plurality of engaging modules 5 are respectively connected with the plurality of connecting members 42 . With this structure, by adjusting the position of the connecting member 42 along the long axis of the adjusting hole 41, and then adjusting the position of each engaging module 5 relative to the sliding member 4 in the sliding direction of the sliding member 4, the positive direction of the sliding member 4 can be ensured. During the sliding process, the ratchet teeth 53 on each engaging module 5 can engage with the one-way ratchet 3 .

In this embodiment, the sliding member 4 may be a long strip with a horizontal plate surface, and the adjustment hole 41 vertically penetrates the sliding member 4 . The adjustment hole 41 has an elongated shape and its long axis is parallel to the sliding direction of the slider 4 . The connecting piece 42 vertically passes through the adjusting hole 41 , the upper end of the connecting piece 42 is clamped on the upper side of the adjusting hole 41 , and the lower end is connected with the engaging module 5 , so that the connecting piece 42 can slide along the long axis of the adjusting hole 41 . Specifically, the engaging module 5 may include a base 51 provided with an accommodating groove 52 , and the lower end of the connecting member 42 is connected to the base 51 . The connecting member 42 can be a bolt, and the sliding member 4 is clamped by the nut and the engaging module 5 , so that the engaging module 5 and the sliding member 4 are fixed.

Please refer to FIG. 2 and FIG. 4 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, the sliding member 4 is provided with a support block 43 , and the support block 43 is located in the opposite direction of the meshing module 5 . On one side, the support block 43 is provided with a retractable abutting member 44 , and the abutting member 44 abuts with the engaging module 5 for restricting the reverse movement of the engaging module 5 relative to the abutting member 44 . Such a structure can avoid that when the ratchet teeth 53 mesh with the one-way ratchet 3 , the meshing module 5 slides reversely along the sliding member 4 under the force of the one-way ratchet 3 , which affects the conveying accuracy.

In this embodiment, the support block 43 is fixed on the opposite end of the sliding member 4 . According to the different positions of the engaging module 5 on the sliding member 4 , the abutting member 44 can be retracted and retracted so as to keep abutting with the engaging module 5 . The abutting member 44 may be a bolt threaded on the support block 43 , and one end of the bolt is in abutment with the engaging module 5 . Specifically, the engaging module 5 may include a base 51 provided with an accommodating groove 52 , and the abutting member 44 abuts the opposite end surface of the base 51 .

Please refer to FIG. 2 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, the meshing module 5 includes a base 51 provided with an accommodating groove 52 , and the shaft end of the ratchet 53 is located in the accommodating groove. 52; when the tooth end of the ratchet 53 is engaged with the one-way ratchet 3, the inner wall on the opposite side of the accommodating groove 52 abuts against the ratchet 53 to limit the rotation of the ratchet 53. The inner wall on the opposite side of the accommodating groove 52 abuts against the ratchet teeth 53 to limit the rotation of the ratchet teeth 53 , so that the inner wall of the accommodating groove 52 can support the ratchet teeth 53 and reduce the force on the rotating shaft of the ratchet teeth 53 .

In this embodiment, the engaging module 5 is detachably connected to the sliding member 4 through the base 51 . The inner wall on the opposite side of the accommodating slot 52 is in agreement with the side surface of the ratchet tooth 53. When the ratchet tooth 53 is rotated to fit with the inner wall of the accommodating slot 52, the ratchet tooth 53 cannot continue to rotate. At this time, the teeth of the ratchet tooth 53 The end can be meshed with the one-way ratchet wheel 3 , and the force of the one-way ratchet wheel 3 on the ratchet teeth 53 is transmitted to the inner wall of the accommodating groove 52 , thereby reducing the force on the rotating shaft of the ratchet teeth 53 .

Referring to FIG. 2 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, an elastic member 54 is provided between the groove bottom of the accommodating groove 52 and the tooth end of the ratchet tooth 53 . 54 is used to push the tooth end of the ratchet 53 to swing close to the one-way ratchet 3 . The tooth end of the ratchet tooth 53 is pushed by the elastic piece 54 to swing close to the one-way ratchet wheel 3 , so that the ratchet tooth 53 can engage with the one-way ratchet wheel 3 at any time.

In this embodiment, the elastic member 54 may be a compression spring located in the accommodating groove 52 .

Referring to FIG. 2 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, the meshing module 5 is located above the one-way ratchet 3 , and the tooth ends of the ratchet teeth 53 hang down with the one-way ratchet 3 . mesh. Since the tooth end of the ratchet tooth 53 hangs down, the gravity of the tooth end of the ratchet tooth 53 can keep the tooth end of the ratchet tooth 53 engaged with the one-way ratchet wheel 3 , thereby simplifying the structure and improving the reliability.

In this embodiment, the sliding member 4 is arranged horizontally above the one-way ratchet wheel 3, and the meshing module 5 is arranged on the lower side of the sliding member 4 and above the one-way ratchet wheel 3, so that the tooth end of the ratchet tooth 53 is under its own gravity. It sags under the action and can engage with the one-way ratchet 3 at any time.

In this embodiment, an elastic member 54 can still be provided between the groove bottom of the accommodating groove 52 and the tooth end of the ratchet tooth 53 to ensure that the tooth end of the ratchet tooth 53 can engage with the one-way ratchet 3 .

Please refer to FIG. 2 , as a specific implementation of the variable step-length stepping feeder provided by the present invention, the frame 1 is provided with a back plate 11 , and the sliding member 4 is located between the back plate 11 and the one-way ratchet 3 During the time, the back of the sliding member 4 is slidingly attached to the surface of the back plate 11, and the engaging module 5 is arranged on the front of the sliding member 4; A guide groove for accommodating the sliding member 4 is formed therebetween. When the one-way ratchet wheel 3 is engaged with the ratchet teeth 53, the one-way ratchet wheel 3 exerts a force on the sliding member 4 through the engagement module 5 to bend and deform the sliding member 4, and the ratchet teeth 53 and the one-way ratchet wheel 3 are separated. This structure is adopted. , the back plate 11 can support the sliding member 4 to prevent the ratchet teeth 53 from being separated from the one-way ratchet wheel 3 due to the deformation of the sliding member 4 .

In this embodiment, the back plate 11 is arranged horizontally. The sliding member 4 is located below the backboard 11 and is horizontally arranged. The upper side of the sliding member 4 is the back surface that fits and slides with the lower side of the backboard 11 , and the lower side of the sliding member 4 is the front side. The engagement module 5 is provided on the front side of the slider 4 . The engaging module 5 includes a base 51 and a ratchet 53 , and the base 51 is connected to the front surface of the slider 4 . The ratchet teeth 53 are rotatably arranged on the lower side of the base 51, and the tooth ends hang down to engage with the one-way ratchet 3 below.

In this embodiment, the guide clamp block 12 is located below the back plate 11 , and a horizontal guide groove is formed between the guide clamp block 12 and the corresponding part of the back plate 11 . One end of the sliding member 4 is slidably arranged in the guide groove, so that the sliding member 4 can reciprocate horizontally.

In this embodiment, the sliding member 4 may be a long strip with a horizontal plate surface, and the sliding member 4 is provided with an adjustment hole 41 which penetrates vertically. The opening at the upper end of the adjustment hole 41 has a countersunk hole structure, so that the upper end of the connecting piece 42 can be stuck in the countersunk hole, so as to avoid interference between the upper end of the connecting piece 42 and the back plate 11 .

Please refer to FIG. 2 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, an adjustment structure is provided between the telescopic end of the telescopic unit 6 and the sliding member 4 , and the adjustment structure is used to adjust the sliding The position of the member 4 relative to the telescopic end of the telescopic unit 6 in the sliding direction of the sliding member 4 .

In this embodiment, by adjusting the position of the sliding member 4 relative to the telescopic end of the telescopic unit 6 in the sliding direction of the sliding member 4 through the adjustment structure, it can be ensured that during the expansion and contraction of the telescopic unit 6, the ratchet teeth 53 on the sliding member 4 can be Engage with one-way ratchet 3. The adjustment structure can adjust a plurality of engaging modules 5 at one time.

Referring to FIG. 2 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, the adjustment structure includes: a first screw 61 , a second screw 45 and an adjustment sleeve 62 .

The first screw 61 is arranged on the telescopic end of the telescopic unit 6 . The second screw 45 is disposed on the sliding member 4 , and the axis is collinear with the axis of the first screw 61 , and the thread rotation direction is opposite to that of the first screw rod 61 . Both ends of the adjusting sleeve 62 are respectively connected with the first screw 61 and the second screw 45 by screw thread.

In this embodiment, the telescopic unit 6 can be an air cylinder or an oil cylinder, the sliding member 4 is a long plate, the sliding member 4 and the telescopic unit 6 are located on a straight line, and the telescopic end of the telescopic unit 6 faces the sliding member 4 . The first screw 61 is coaxially disposed on the telescopic end of the telescopic unit 6, and the second screw 45 is coaxially disposed on the end of the sliding member 4 close to the telescopic unit 6, so that the first screw 61 and the second screw 45 are opposite. Both ends of the adjusting sleeve 62 are respectively connected with the first screw 61 and the second screw 45, so that the sliding member 4 can be moved closer to or away from the telescopic unit 6 by rotating the adjusting sleeve 62, so as to adjust the sliding member 4 relative to the telescopic unit. The position of the telescopic end of 6 in the sliding direction of slider 4.

Please refer to FIG. 3 , as a specific embodiment of the variable step-length stepping feeder provided by the present invention, the frame 1 includes two side frames 13 arranged opposite to each other, and the conveyor belt 2 is arranged between the two side frames 13 During the time, the drive shaft passes out of the two side frames 13, and the one-way ratchet 3 is located outside the two side frames 13 and is detachably connected with the drive shaft. With this structure, during production, the one-way ratchet 3 can be replaced with a motor, so as to make a continuous conveyor, which is convenient for product transformation.

In this embodiment, the side frame 13 may be a frame structure made of steel components, the conveyor belt 2 is arranged between the two side frames 13 , and the one-way ratchet 3 , the sliding member 4 and the telescopic unit 6 are all arranged on the same side frame 13 the outer side. The rotating shafts at both ends of the driven roller of the conveyor belt 2 are respectively connected with the two side frames 13 for rotation through bearings. form the drive shaft. The ratchet wheel can be detachably connected to the drive shaft of the conveyor belt 2 through a flange structure, and the ratchet wheel can also be provided with sleeve holes and sleeved on the drive shaft of the conveyor belt 2 .

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of protection.

Claims (10)

1. Step-by-step feeder of variable step length, its characterized in that includes:

a frame;

the conveying belt is arranged on the rack and is provided with a driving shaft;

the one-way ratchet wheel is arranged on the driving shaft;

the sliding piece is arranged on the rack and can slide in a reciprocating manner in the forward direction and the reverse direction;

the meshing modules are respectively detachably arranged on the sliding piece and distributed along the sliding direction of the sliding piece, each meshing module is rotatably provided with a ratchet, and the ratchet is used for meshing with the one-way ratchet wheel when the sliding piece slides in the forward direction and separating from the one-way ratchet wheel when the sliding piece slides in the reverse direction; and

and the telescopic unit is arranged on the rack and used for driving the sliding piece to slide in a reciprocating manner.

2. The step feeder according to claim 1, wherein the sliding member has an elongated adjusting hole, the long axis of the adjusting hole is parallel to the sliding direction of the sliding member, the adjusting hole has a plurality of connecting members adjustable along the long axis of the adjusting hole, and the plurality of engaging modules are respectively connected to the plurality of connecting members.

3. The step feeder according to claim 2, wherein the sliding member is provided with a support block located on a reverse side of the engagement module, and the support block is provided with a retractable abutment member abutting against the engagement module for limiting a reverse movement of the engagement module relative to the abutment member.

4. The variable step size feeder of claim 1, wherein the engagement module comprises a base having a receiving slot, the pivot end of the ratchet being located in the receiving slot; when the tooth end of the ratchet is engaged with the one-way ratchet, the inner wall of the reverse side of the accommodating groove is abutted to the ratchet to limit the rotation of the ratchet.

5. The step feeder of variable step size according to claim 4, wherein an elastic member is provided between the bottom of the receiving groove and the tooth end of the ratchet for urging the tooth end of the ratchet to swing close to the one-way ratchet.

6. The variable step size feeder of any one of claims 1 to 5, wherein the engagement module is located above the one-way ratchet wheel, and the teeth of the ratchet teeth droop to engage with the one-way ratchet wheel.

7. The step feeder according to any one of claims 1 to 5, wherein a back plate is disposed on the frame, the sliding member is disposed between the back plate and the one-way ratchet wheel, a back surface of the sliding member is in sliding fit with a plate surface of the back plate, and the engaging module is disposed on a front surface of the sliding member; the rack is also provided with a guide clamping block, and a guide groove for accommodating the sliding part is formed between the guide clamping block and the back plate.

8. The step feeder of any one of claims 1 to 5, wherein an adjusting structure is provided between the telescopic end of the telescopic unit and the sliding member, and the adjusting structure is used for adjusting the position of the sliding member relative to the telescopic end of the telescopic unit in the sliding direction of the sliding member.

9. The variable step feeder of claim 8, wherein the adjustment structure comprises:

the first screw is arranged on the telescopic end of the telescopic unit;

the second screw rod is arranged on the sliding part, the axis of the second screw rod is collinear with the axis of the first screw rod, and the thread turning direction of the second screw rod is opposite to that of the first screw rod; and

and two ends of the adjusting sleeve are respectively in threaded connection with the first screw rod and the second screw rod.

10. The step feeder of any one of claims 1 to 5, wherein the frame comprises two side frames disposed opposite to each other, the conveyor belt is disposed between the two side frames, the driving shaft penetrates out of the two side frames, and the one-way ratchet is disposed outside the two side frames and detachably connected to the driving shaft.

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