Precise feeding machine capable of conveniently adjusting loosening distance

Abstract

The precise feeder comprises a shell, an upper roller, a lower roller, a lifting seat and a lifting mechanism, the lower roller is rotationally connected to the shell, the upper roller is rotationally connected to the lifting seat, the lifting seat is driven by the lifting mechanism to move up and down so that the upper roller can move to be close to or away from the lower roller, and the lifting mechanism comprises a motor, an adjusting rod and a sleeve. The motor is arranged on the shell, the sleeve is arranged on the lifting seat, the adjusting rod is connected with the motor and the sleeve, the adjusting rod is driven by the motor to rotate, and the sleeve is driven to move up and down when the adjusting rod rotates, so that the lifting seat is driven to move up and down to enable the upper roller to move close to or away from the lower roller. The lifting mechanism is provided with the motor, the adjusting rod and the sleeve, the adjusting rod is driven by the motor to rotate, the sleeve is driven to move up and down when the adjusting rod rotates to enable the upper roller to move to be close to or away from the lower roller, and the moving distance of the sleeve is controlled by the rotating amplitude of the adjusting rod, so that the sleeve is high in moving precision, wide in adjustable range and flexible in adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of automatic feeding equipment, in particular to a precision feeder which is convenient for adjusting a release interval. Background Art

[0002] Automatic feeding equipment is a device used to transport materials. Existing automatic feeding equipment includes a housing, an upper roller, a lower roller, a lifting seat, and a lifting mechanism. The lower roller is rotatably connected to the housing, while the upper roller is rotatably connected to the lifting seat. The lifting seat is driven up and down by the lifting mechanism, moving the upper roller toward or away from the lower roller. The lifting mechanism includes a motor, a rotating shaft, and a cam. The motor is mounted on the housing, and the rotating shaft is located above the lifting seat and driven by the motor. The cam is mounted on the rotating shaft and rotates with the rotating shaft, moving the lifting seat up and down. Existing automatic feeding equipment uses the cam to drive the upper roller up and down. However, due to the low adjustment accuracy and limited adjustable range of the cam, the adjustment accuracy of the upper roller is low and the adjustable range is limited. Summary of the Invention

[0003] The purpose of the present invention is to provide a precision feeder which is easy to adjust the relaxation spacing, so as to solve the problems of low adjustment accuracy and limited adjustable range in existing automatic feeding equipment which drives the upper roller to move up and down through a cam.

[0004] The present invention is achieved through the following technical solutions:

[0005] A precision feeder that is convenient for adjusting the relaxation spacing includes a shell, an upper roll, a lower roll, a lifting seat and a lifting mechanism. The lower roll is rotatably connected to the shell, the upper roll is rotatably connected to the lifting seat, and the lifting seat is driven up and down by the lifting mechanism to move the upper roll closer to or away from the lower roll. The lifting mechanism includes a motor, an adjusting rod and a sleeve. The motor is provided on the shell, the sleeve is provided on the lifting seat, the adjusting rod is respectively connected to the motor and the sleeve, and the adjusting rod is driven to rotate by the motor. When the adjusting rod rotates, the sleeve is driven up and down, thereby driving the lifting seat to move up and down to move the upper roll closer to or away from the lower roll.

[0006] Furthermore, the outer shell has an assembly cavity, and the upper roller, the lower roller and the lifting seat are accommodated in the assembly cavity. The lifting mechanism also includes an upper connecting seat, which is arranged at the top of the outer shell and partially extends into the assembly cavity and is slidably connected to the sleeve. The upper connecting seat has an upper cavity for accommodating the adjusting rod, and the motor is arranged at the top of the upper connecting seat and the output shaft extends into the upper cavity and is connected to the adjusting rod.

[0007] Furthermore, an outer flange is provided on the outer side wall of the adjusting rod, and the outer flange divides the upper cavity into an upper transmission cavity and a lower transmission cavity arranged upper and lower, the upper transmission cavity is close to the upper side, and the lower transmission cavity is close to the lower side, and a ball bearing passing through the adjusting rod is provided in the upper transmission cavity, and a tapered bearing passing through the adjusting rod is provided in the lower transmission cavity.

[0008] Furthermore, the adjusting rod has a socket for inserting the motor output shaft, and a hydraulic tensioning sleeve is provided in the socket and is sleeved on the motor output shaft. The hydraulic tensioning sleeve is tightly fitted with the motor output shaft and the adjusting rod respectively, and the hydraulic tensioning sleeve has a stop ring that stops on the top of the adjusting rod.

[0009] Furthermore, the bottom of the upper connecting seat is provided with an insert ring arranged outside the adjusting rod, the sleeve and the adjusting rod are combined to form a ring groove for the insert ring to be inserted, the insert ring is respectively abutted against the sleeve and the adjusting rod, a sealing groove is provided on the outside of the insert ring, and a sealing ring is provided in the sealing groove.

[0010] Furthermore, the sleeve has a lower cavity for accommodating the adjusting rod, the lower cavity extends up and down, and the lower cavity wall bulges inward to divide the lower cavity into an upper clearance cavity and a lower threaded cavity, the adjusting rod is partially accommodated in the lower threaded cavity and is threadedly connected to the sleeve in the lower threaded cavity, and the adjusting rod is partially accommodated in the upper clearance cavity and is surrounded by the sleeve to form the annular groove.

[0011] Furthermore, the lifting seat has an assembly groove and a clearance hole, the assembly groove opens downward, the clearance hole is provided at the top of the lifting seat and is connected to the assembly groove, the upper roller extends horizontally and is accommodated in the assembly groove, and the lifting mechanism also includes a lower connecting seat, the lower connecting seat is accommodated in the assembly groove, the lower connecting seat partially spans the clearance hole and is connected to the lifting seat, and partially extends into the clearance hole and is connected to the sleeve.

[0012] Furthermore, the length direction of the upper roller is defined as the left and right direction, and the lower connecting seat includes a left connecting seat, a middle connecting seat, a right connecting seat and a connecting shaft. The left connecting seat, the middle connecting seat and the right connecting seat are arranged in sequence from left to right and are respectively rotatably connected to the connecting shaft. The left connecting seat and the right connecting seat are respectively connected to the lifting seat, and the middle connecting seat partially extends into the clearance hole and is connected to the sleeve.

[0013] Furthermore, the upper connecting seat is provided with an oil inlet channel and an oil return channel connected to the upper chamber, the adjusting rod is provided with a vertical guide channel connected to the lower transmission chamber, the connecting shaft has a transverse guide channel, the middle connecting seat has a middle connecting chamber respectively connected to the transverse guide channel and the vertical guide channel, the left connecting seat has a left connecting chamber connected to the transverse guide channel, and the right connecting seat has a right connecting chamber connected to the transverse guide channel.

[0014] Furthermore, the outer shell is rotatably connected with a driving tooth and a driven tooth that mesh with each other, the driving tooth is connected to one axial end of the lower roller, and the driven tooth is slidably connected to one axial end of the upper roller. One of the upper roller and the driven tooth is provided with a guide groove, and the other is provided with a guide block that slides with the guide groove.

[0015] The advantage of this technical solution is that by configuring the lifting mechanism into a motor, an adjusting rod and a sleeve, the adjusting rod is driven to rotate by the motor, and when the adjusting rod rotates, the sleeve is driven to move up and down, so that the upper roll moves closer to or away from the lower roll. Since the movement distance of the sleeve is controlled by the rotation amplitude of the adjusting rod, the movement accuracy of the sleeve is high, the adjustable range is wide, and the adjustment is flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 It is a three-dimensional diagram of a precision feeder that is convenient for adjusting the relaxation distance disclosed in an embodiment;

[0019] Figure 2 1. It is a top view of a precision feeder for facilitating adjustment of the relaxation spacing disclosed in an embodiment;

[0020] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle;

[0021] Figure 4 yes Figure 3 A partial enlarged view of point C in the middle;

[0022] Figure 5 yes Figure 4 A partial enlarged view of point D in the middle;

[0023] Figure 6 yes Figure 2 Cross-sectional view at the middle BB;

[0024] Figure 7 yes Figure 6 A partial enlarged view of point E in the middle;

[0025] Figure 8This is a front view of a precision feeder that facilitates adjustment of the relaxation spacing disclosed in an embodiment;

[0026] Figure 9 yes Figure 8 A partial enlarged view of the middle FF;

[0027] Figure 10 It is a partial exploded view of a precision feeder for facilitating adjustment of the relaxation spacing disclosed in an embodiment;

[0028] Figure 11 yes Figure 10 A partial enlarged view of point G in the middle;

[0029] Figure 12 1 is a perspective view of the sleeve in the embodiment. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Example: Figure 1-12 As shown, the precision feeder which is convenient for adjusting the relaxation spacing includes a shell 1, an upper roll 2, a lower roll 3, a lifting seat 4 and a lifting mechanism 5. The lower roll 3 is rotatably connected to the shell 1, the upper roll 2 is rotatably connected to the lifting seat 4, and the lifting seat 4 is driven up and down by the lifting mechanism 5 to move the upper roll 2 closer to or away from the lower roll 3. The lifting mechanism 5 includes a motor 501, an adjusting rod 502 and a sleeve 503. The motor 501 is provided on the shell 1, and the sleeve 503 is provided on the lifting seat 4. The adjusting rod 502 is connected to the motor 501 and the sleeve 503 respectively. The adjusting rod 502 is driven to rotate by the motor 501. When the adjusting rod 502 rotates, the sleeve 503 is driven to move up and down, thereby driving the lifting seat 4 to move up and down to move the upper roll 2 closer to or away from the lower roll 3. The movement direction of the sleeve 503 is controlled by the rotation direction of the adjustment rod 502, and the movement range of the sleeve 503 is controlled by the rotation range of the adjustment rod 502. The greater the rotation range of the adjustment rod 502, the greater the movement range of the sleeve 503, and the smaller the rotation range of the adjustment rod 502, the smaller the movement range of the sleeve 503. Specifically, the sleeve 503 is made of copper and is threadedly connected to the adjustment rod 502.

[0032] This embodiment provides a precision feeder that is easy to adjust the relaxation spacing to solve the problem that the existing automatic feeding equipment drives the upper roll to move up and down through the cam, has low adjustment accuracy and limited adjustable range. It is mainly achieved by configuring the lifting mechanism 5 into a motor 501, an adjusting rod 502 and a sleeve 503. The adjusting rod 502 is driven to rotate by the motor 501. When the adjusting rod 502 rotates, it drives the sleeve 503 to move up and down to move the upper roll 2 closer to or away from the lower roll 3. Since the moving distance of the sleeve 503 is controlled by the rotation amplitude of the adjusting rod 502, the movement accuracy of the sleeve 503 is high, the adjustable range is wide, and the adjustment is flexible.

[0033] In the embodiment of the present invention, the housing 1 has an assembly cavity 101, and the upper roller 2, the lower roller 3, and the lifting seat 4 are accommodated in the assembly cavity 101. The lifting mechanism 5 also includes an upper connecting seat 504, which is arranged at the top of the housing 1 and partially extends into the assembly cavity 101 and is slidably connected to the sleeve 503. The upper connecting seat 504 has an upper cavity 505 for accommodating the adjustment rod 502. The motor 501 is arranged at the top of the upper connecting seat 504, and the output shaft extends into the upper cavity 505 and is connected to the adjustment rod 502. The above arrangement, by disposing the upper connecting seat 504 at the top of the housing 1, which partially extends into the assembly cavity 101 and is slidably connected to the sleeve 503, and the upper connecting seat 504 has an upper cavity 505 for accommodating the adjustment rod 502 and allowing the output shaft of the motor 501 to extend into, thereby ensuring a stable and compact assembly of the motor 501, the adjustment rod 502, and the sleeve 503.

[0034] In this embodiment of the present invention, the outer wall of the adjusting rod 502 is provided with an outer flange 506. The outer flange 506 divides the upper chamber 505 into an upper transmission chamber 507 and a lower transmission chamber 508, with the upper transmission chamber 507 positioned at the top and the lower transmission chamber 508 positioned at the bottom. A ball bearing 509 is positioned within the upper transmission chamber 507 and extends through the adjusting rod 502, while a tapered bearing 510 is positioned within the lower transmission chamber 508 and extends through the adjusting rod 502. This arrangement, by arranging the ball bearing 509 within the upper transmission chamber 507 and extending through the adjusting rod 502, allows the motor 501 to smoothly rotate the adjusting rod 502, allowing for fine-tuning of the rotational range of the adjusting rod 502 with high rotational accuracy. Furthermore, by arranging the tapered bearing 510 within the lower transmission chamber 508 and extending through the adjusting rod 502, the assembly of the adjusting rod 502 with the upper connecting seat 504 is stabilized, preventing the adjusting rod 502 from swinging in the vertical plane during rotation and improving the rotational accuracy of the adjusting rod 502.

[0035] In this embodiment of the present invention, the adjustment rod 502 has a socket (not shown) for inserting the output shaft of the power supply 501. A hydraulic expansion sleeve 511, which is mounted on the output shaft of the motor 501, is positioned within the socket. The hydraulic expansion sleeve 511 fits snugly against the output shaft of the motor 501 and the adjustment rod 502, respectively. The hydraulic expansion sleeve 511 includes a stop ring (not shown) that abuts against the top of the adjustment rod 502. This arrangement, by providing the adjustment rod 502 with a socket for inserting the output shaft of the power supply 501 and positioning the hydraulic expansion sleeve 511 mounted on the output shaft of the motor 501 within the socket, ensures a tight fit between the adjustment rod 502 and the motor 501, resulting in high rotational precision.

[0036] In this embodiment of the present invention, an insert ring 512 is provided at the bottom of the upper connecting seat 504, which is arranged around the outside of the adjustment rod 502. The sleeve 503 and the adjustment rod 502 together form an annular groove 513 for the insert ring 512 to be inserted into. The insert ring 512 abuts against the sleeve 503 and the adjustment rod 502, respectively. A sealing groove (not shown) is provided on the outside of the insert ring 512, and a sealing ring 514 is provided in the sealing groove. The above arrangement, by disposing the insert ring 512 on the upper connecting seat 504, disposing the annular groove 513 for the insert ring 512 to be inserted between the sleeve 503 and the adjustment rod 502, and the insert ring 512 abuts against the sleeve 503 and the adjustment rod 502, respectively, ensures that the sleeve 503 and the upper connecting seat 504 are tightly assembled and move smoothly.

[0037] In this embodiment of the present invention, the sleeve 503 has a lower cavity 515 for accommodating the adjustment rod 502. The lower cavity 515 extends vertically, and the lower cavity wall bulges inward, dividing the lower cavity 515 into an upper clearance cavity 516 and a lower threaded cavity 517. The adjustment rod 502 is partially accommodated in the lower threaded cavity 517 and threadedly connected to the sleeve 503. The adjustment rod 502 is partially accommodated in the upper clearance cavity 516 and, together with the sleeve 503, forms an annular groove 513. This arrangement, by configuring the lower cavity 515 as the lower threaded cavity 517 threadedly connected to the adjustment rod 502 and the upper clearance cavity 516, which, together with the adjustment rod 502, forms an annular groove 513, allows the sleeve 503 to move up and down smoothly and with high precision.

[0038] In this embodiment of the present invention, the lifting base 4 has an assembly slot 401 and a clearance hole 402. The assembly slot 401 opens downward, and the clearance hole 402 is provided at the top of the lifting base 4 and communicates with the assembly slot 401. The upper roller 2 extends horizontally and is accommodated within the assembly slot 401. The lifting mechanism 5 also includes a lower connecting seat 518 accommodated within the assembly slot 401. The lower connecting seat 518 partially spans the clearance hole 402 and connects to the lifting base 4, and partially extends into the clearance hole 402 and connects to the sleeve 503. The above arrangement, by disposing the lower connecting seat 518 within the assembly slot 401, which partially spans the clearance hole 402 and connects to the lifting base 4, and partially extends into the clearance hole 402 and connects to the sleeve 503, ensures a stable connection between the sleeve 503 and the lifting base 4.

[0039] In an embodiment of the present invention, the length direction of the upper roller 2 is defined as the left and right direction, and the lower connecting seat 518 includes a left connecting seat 519, a middle connecting seat 520, a right connecting seat 521 and a connecting shaft 522. The left connecting seat 519, the middle connecting seat 520, and the right connecting seat 521 are arranged in sequence from left to right and are respectively rotatably connected to the connecting shaft 522. The left connecting seat 519 and the right connecting seat 521 are respectively connected to the lifting seat 4, and the middle connecting seat 520 partially extends into the clearance hole 402 and is connected to the sleeve 503. The above arrangement is achieved by configuring the lower connecting seat 518 into a left connecting seat 519, a middle connecting seat 520, a right connecting seat 521 and a connecting shaft 522. The left connecting seat 519, the middle connecting seat 520 and the right connecting seat 521 are respectively rotatably connected to the connecting shaft 522. The left connecting seat 519 and the right connecting seat 521 are respectively connected to the lifting seat 4. The middle connecting seat 520 partially extends into the clearance hole 402 and is connected to the sleeve 503, thereby making the connection between the sleeve 503 and the lifting seat 4 stable.

[0040] In this embodiment of the present invention, the upper connecting seat 504 is provided with an oil inlet channel 523 and an oil return channel 524 communicating with the upper chamber 505. The adjusting rod 502 is provided with a vertical guide channel 525 communicating with the lower transmission chamber 508. The sleeve 503 has a lower chamber 515 communicating with the vertical guide channel 525. The connecting shaft 522 has a transverse guide channel 527. The middle connecting seat 520 has a middle connecting chamber 500 communicating with the lower chamber 515 and the transverse guide channel 527, respectively. The left connecting seat 519 has a left connecting chamber (not shown) communicating with the transverse guide channel 527. The right connecting seat 521 has a right connecting chamber (not shown) communicating with the transverse guide channel 527. This arrangement allows the hydraulic oil to circulate within the lifting mechanism 5 in a reasonable and compact flow path.

[0041] In this embodiment of the present invention, the housing 1 is rotatably connected to a driving tooth 6 and a driven tooth 7 that mesh with each other. The driving tooth 6 is connected to one axial end of the lower roller 3, and the driven tooth 7 is slidably connected to one axial end of the upper roller 2. The driven tooth 7 is provided with a guide groove 701, and the upper roller 2 is provided with a guide block 201 that slidably cooperates with the guide groove 701. The above arrangement, by configuring the driving tooth 6 connected to one axial end of the lower roller 3 and the driven tooth 7 slidably connected to one axial end of the upper roller 2 on the housing 1, enables the upper and lower rollers 2 and 3 to move synchronously to convey materials, and prevents the upper roller 2 from driving the driven tooth 7 with the movement of the driven tooth 7 when the upper roller 2 moves up and down relative to the lower roller 3, causing wear on the driven tooth 7 and affecting accuracy.

[0042] In other embodiments, a guide block 201 is provided on the driven tooth 7 , and a guide groove 701 that slides with the guide block 201 is provided on the upper roller 2 .

[0043] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information. In addition, the terms "center of a circle", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] The above descriptions are one or more embodiments provided in conjunction with specific content, and the specific implementation of the present invention is not limited to these descriptions. Any similarity or similarity with the methods, structures, etc. of the present invention, or any technical deduction or replacement based on the concept of the present invention shall be considered as protection of the present invention.

Claims

1. A precision feeder that is convenient for adjusting the relaxation spacing, comprising a housing (1), an upper roll (2), a lower roll (3), a lifting seat (4) and a lifting mechanism (5), wherein the lower roll (3) is rotatably connected to the housing (1), the upper roll (2) is rotatably connected to the lifting seat (4), and the lifting seat (4) is driven up and down by the lifting mechanism (5) to move the upper roll (2) closer to or away from the lower roll (3), characterized in that: The lifting mechanism (5) comprises a motor (501), an adjusting rod (502) and a sleeve (503); the motor (501) is arranged on the housing (1); the sleeve (503) is arranged on the lifting seat (4); the adjusting rod (502) is connected to the motor (501) and the sleeve (503) respectively; the adjusting rod (502) is driven to rotate by the motor (501); when the adjusting rod (502) rotates, the sleeve (503) is driven to move up and down, thereby driving the lifting seat (4) to move up and down, so that the upper roller (2) moves closer to or away from the lower roller (3).

2. The precision feeder with easy adjustment of the relaxation distance according to claim 1 is characterized in that: The housing (1) has an assembly cavity (101), and the upper roller (2), the lower roller (3) and the lifting seat (4) are accommodated in the assembly cavity (101); The lifting mechanism (5) further comprises an upper connecting seat (504), which is arranged at the top of the housing (1) and partially extends into the assembly cavity (101) and is slidably connected to the sleeve (503), and the upper connecting seat (504) has an upper cavity (505) for accommodating the adjusting rod (502), and the motor (501) is arranged at the top of the upper connecting seat (504) and the output shaft extends into the upper cavity (505) and is connected to the adjusting rod (502).

3. The precision feeder with easy adjustment of the relaxation distance according to claim 2 is characterized in that: The outer side wall of the adjusting rod (502) is provided with an outer flange (506), and the outer flange (506) divides the upper chamber (505) into an upper transmission chamber (507) and a lower transmission chamber (508) arranged in an upper and lower manner, wherein the upper transmission chamber (507) is located at the upper side and the lower transmission chamber (508) is located at the lower side. A ball bearing (509) passing through the adjusting rod (502) is provided in the upper transmission chamber (507), and a tapered bearing (510) passing through the adjusting rod (502) is provided in the lower transmission chamber (508).

4. The precision feeder with easy adjustment of the relaxation distance according to claim 1 is characterized in that: The adjusting rod (502) has a socket for inserting the output shaft of the motor (501), and a hydraulic expansion sleeve (511) sleeved on the output shaft of the motor (501) is provided in the socket. The hydraulic expansion sleeve (511) is tightly fitted with the output shaft of the motor (501) and the adjusting rod (502) respectively, and the hydraulic expansion sleeve (511) has a stop ring that stops on the top of the adjusting rod (502).

5. The precision feeder with easy adjustment of the relaxation distance according to claim 2 is characterized in that: The bottom of the upper connecting seat (504) is provided with an insert ring (512) arranged outside the adjusting rod (502), the sleeve (503) and the adjusting rod (502) are combined to form a ring groove (513) for the insert ring (512) to be inserted, the insert ring (512) is respectively abutted against the sleeve (503) and the adjusting rod (502), a sealing groove is provided on the outside of the insert ring (512), and a sealing ring (514) is provided in the sealing groove.

6. The precision feeder with easy adjustment of the relaxation distance according to claim 5, characterized in that: The sleeve (503) has a lower cavity (515) for accommodating the adjusting rod (502). The lower cavity (515) extends up and down, and the lower cavity wall bulges inward to divide the lower cavity (515) into an upper clearance cavity (516) and a lower threaded cavity (517). The adjusting rod (502) is partially accommodated in the lower threaded cavity (517) and is threadedly connected to the sleeve (503) in the lower threaded cavity (517). The adjusting rod (502) is partially accommodated in the upper clearance cavity (516) and is surrounded by the sleeve (503) to form the annular groove (513).

7. The precision feeder with easy adjustment of the relaxation distance according to claim 2, characterized in that: The lifting seat (4) has an assembly groove (401) and a clearance hole (402), the assembly groove (401) opens downward, the clearance hole (402) is provided at the top of the lifting seat (4) and communicates with the assembly groove (401), and the upper roller (2) extends horizontally and is accommodated in the assembly groove (401); The lifting mechanism (5) further includes a lower connecting seat (518), which is accommodated in the assembly groove (401). Part of the lower connecting seat (518) spans the clearance hole (402) and is connected to the lifting seat (4), and part of the lower connecting seat (518) extends into the clearance hole (402) and is connected to the sleeve (503).

8. The precision feeder with easy adjustment of the relaxation distance according to claim 7, characterized in that: The length direction of the upper roller (2) is defined as the left-right direction, and the lower connecting seat (518) includes a left connecting seat (519), a middle connecting seat (520), a right connecting seat (521) and a connecting shaft (522). The left connecting seat (519), the middle connecting seat (520) and the right connecting seat (521) are arranged in sequence from left to right and are respectively rotatably connected to the connecting shaft (522). The left connecting seat (519) and the right connecting seat (521) are respectively connected to the lifting seat (4), and the middle connecting seat (520) partially extends into the clearance hole (402) and is connected to the sleeve (503).

9. The precision feeder with easy adjustment of the relaxation distance according to claim 8, characterized in that: The upper connecting seat (504) is provided with an oil inlet channel (523) and an oil return channel (524) communicating with the upper chamber (505); the adjusting rod (502) is provided with a vertical guide channel (525) communicating with the upper chamber (505); the connecting shaft (522) has a transverse guide channel (527); the middle connecting seat (520) has a middle connecting chamber (500) communicating with the transverse guide channel (527) and the vertical guide channel (525) respectively; the left connecting seat (519) has a left connecting chamber communicating with the transverse guide channel (527); and the right connecting seat (521) has a right connecting chamber communicating with the transverse guide channel (527).

10. The precision feeder with easy adjustment of the relaxation distance according to claim 1, characterized in that: The housing (1) is rotatably connected to a driving tooth (6) and a driven tooth (7) that mesh with each other, the driving tooth (6) being connected to one axial end of the lower roller (3), the driven tooth (7) being slidably connected to one axial end of the upper roller (2), one of the upper roller (2) and the driven tooth (7) being provided with a guide groove (701), and the other of the two being provided with a guide block (201) that slidably cooperates with the guide groove (701).

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