Roller limiting structure

By designing the roller limit structure of the seat block, limiting mechanism and driving mechanism in the roller press, the inconvenience problem of the roller press when adjusting the distance between the two rollers is solved, and flexible distance adjustment and stable roller position are achieved.

CN120024066AActive Publication Date: 2025-05-23SINOMA LIYANG HEAVY MACHINERY
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Patent Information

Application Number
CN202510519068.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-24
Publication Date
2025-05-23
Estimated Expiration
2045-04-24

AI Technical Summary

Technical Problem

When adjusting the distance between the two rollers, the existing roller presses have problems of inconvenience in adjusting the distance between the two rollers, especially when space is limited.

Method used

A roller limiting structure is designed, including a seat block, a limiting mechanism and a drive mechanism. The distance between the limiting mechanism and the seat block is controlled by the driving mechanism, and the distance between the two rollers is adjusted. The limited transfer component and the stuck transfer component further avoid the problems of mistouching and adjustment difficulties.

Benefits of technology

Flexible adjustment of the distance between the two rollers is achieved, and the movement of the rollers when fixed is avoided, especially when the space is limited, the adjustment assembly can effectively control the roller position.

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Abstract

The invention relates to the technical field of roller presses, and discloses a roller limiting structure which comprises seat blocks arranged in pairs. The roller is rotationally arranged between the two seat blocks; the limiting mechanism is arranged on the seat block; the driving mechanism is arranged on the limiting mechanism and is used for controlling the limiting mechanism to adjust the distance between the two rollers; when the distance between the two adjacent rollers on the roller press needs to be adjusted, the distance between the limiting mechanism and the seat block is controlled through the driving mechanism, and then the distance between the two rollers can be adjusted.
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Description

Technical Field

[0001] The present invention relates to the technical field of roller presses, and in particular to a roller limiting structure. Background Art

[0002] ‌ Limit blocks are generally required between the rollers of a roller press, mainly to control the position and stroke of the rollers and ensure the stability and safety of the roller press during operation. The limit blocks are fixed to the relevant parts of the machine tool by screws, and their function is to limit the moving position and distance of the parts. Since the distance between the two rollers of the roller press is limited, when the two rollers need to be limited, it is inconvenient to adjust the distance.

[0003] To this end, the present invention provides a roller limiting structure. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0005] The present invention provides a roller limiting structure, a seat block, the seat blocks are arranged in pairs, the seat blocks are slidably connected to a roller press; and a roller rotatably arranged between the two seat blocks; it also includes: a limiting mechanism arranged on the seat block; and a driving mechanism arranged on the limiting mechanism, the driving mechanism is used to control the limiting mechanism to adjust the distance between the two rollers.

[0006] Specifically, when the distance between two adjacent rollers on the roller press needs to be adjusted, the distance between the limiting mechanism and the seat block is controlled by the driving mechanism, thereby adjusting the distance between the two rollers.

[0007] Preferably, the limiting mechanism comprises: a limiting plate arranged on the side of the seat block, the limiting plate being fixedly connected to the roller press; and a pad arranged between the seat block and the limiting plate.

[0008] Preferably, the driving mechanism includes an adjusting component, which includes: a moving part arranged on the limit plate; and a control part arranged on the moving part, and a semi-straight groove is opened on the pad; the moving part is slidably connected to the semi-straight groove, and the moving part is slidably arranged in the seat block.

[0009] Preferably, the movable part includes: a sliding rod sliding in the fixed groove, the fixed groove is opened in the seat block and the limit plate; and a clamping block placed in the clamping groove, the clamping groove is opened in the limit plate, the clamping groove is opened on the side of the fixed groove, and the clamping block is fixedly connected to the outer wall of the sliding rod.

[0010] Preferably, the control member includes: a driving rod placed in a rotating groove, the rotating groove is opened in the sliding rod, and the driving rod can rotate in the rotating groove; a rotating plate fixedly connected to the end of the driving rod, the rotating plate is rotatably connected to the sliding rod; an arc groove opened on the rotating plate; a pulling rod sliding in a straight-limiting groove, the straight-limiting groove is opened in the sliding rod; a locking ball sliding on a through groove, the through groove is opened in the sliding rod, the straight-limiting groove and the through groove are connected, one end of the pulling rod is placed in the arc groove, and the other end of the pulling rod passes through the straight-limiting groove and is fixedly connected to the locking ball; and a ball groove opened on the side of the fixing groove, the locking ball is adapted to the ball groove.

[0011] Preferably, the driving mechanism also includes a rotation limiting component, which includes: a fixed plate that slides in the plate groove, and the plate groove is opened on the driving rod; a limiting spring fixed to the fixed plate, one end of the limiting spring is fixed to the fixed plate, and the other end of the limiting spring is fixed to the bottom surface of the plate groove; and a fixed groove opened on the side wall of the rotating groove, and the fixed groove is adapted to the fixed plate.

[0012] Specifically, the rotation limiting assembly can prevent the driving rod from being accidentally touched and causing the driving rod to rotate, causing the connection between the adjustment assembly and the seat block to loosen, thereby causing the roller to move when it is fixed.

[0013] Preferably, the driving mechanism also includes a card-turning assembly, which includes: a card-turning part arranged in a transfer and pressure groove, wherein the transfer and pressure groove is opened in a limiting plate, the card-turning part is movably connected in the transfer and pressure groove, and two groups of the card-turning parts are symmetrically arranged on the side of the driving rod; and a connecting part arranged between the two groups of the card-turning parts, and the two groups of the card-turning parts cooperate with the connecting part to clamp the driving rod for rotation.

[0014] Specifically, the problem that the adjustment component is difficult to control when the space adjacent to the rollers is small can be avoided by using the card rotation component.

[0015] Preferably, the rotating part includes: a pressure plate arranged on the side of the driving rod; an arc surface arranged on the pressure plate, the arc surface is matched with the driving rod, and the arc surface is located directly above the fixed plate; a clamping strip fixedly connected to the arc surface, a groove is provided on the driving rod, and the clamping strip is matched with the groove; a first magnetic block fixedly connected to the upper wall of the pressure plate; and a second magnetic block fixedly connected to the rotating groove, and the first magnetic block can be adsorbed with the second magnetic block.

[0016] Preferably, the connecting member includes: a first connecting rod fixedly connected to one of the pressure plates; and a second connecting rod arranged on the first connecting rod, the first connecting rod is slidably connected to the second connecting rod, and the second connecting rod is fixedly connected to another pressure plate.

[0017] The beneficial effects of the present invention are as follows: the distance between the limiting mechanism and the seat block is controlled by the driving mechanism, thereby adjusting the distance between the two rollers; the rotation limiting component can avoid accidentally touching the driving rod and causing the driving rod to rotate, causing the connection between the adjustment component and the seat block to loosen, thereby causing the roller to move when fixed; the locking component can avoid the problem of the adjustment component being difficult to control when the adjacent space of the rollers is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the limiting mechanism in the present invention; Figure 3 It is a structural schematic diagram of the limiting plate in the present invention; Figure 4 It is a structural schematic diagram of the pad in the present invention; Figure 5 It is a structural schematic diagram of the rotation limiting component in the present invention; Figure 6 It is a schematic structural diagram of the driving rod in the present invention; Figure 7 yes Figure 6 A schematic diagram of the structure enlargement at the center A; Figure 8 It is a structural schematic diagram of the connecting member in the present invention; Figure 9 It is a structural schematic diagram of the card transfer member in the present invention.

[0019] Description of reference numerals: 1, seat block; 2, roller; 3, limiting mechanism; 31, limiting plate; 32, pad; 33, semi-straight groove; 4, driving mechanism; 41, adjusting assembly; 42, rotation limiting assembly; 43, rotating assembly; 411, moving member; 412, control member; 421, plate groove; 422, fixed plate; 423, limiting spring; 424, fixed groove; 431, rotating member; 432, connecting member; 433, rotating and pressing groove; 4111, fixed groove; 4112, slide rod; 4113, card slot; 4114, card block; 4121, rotating slot; 4122, driving rod; 4123, rotating plate; 4124, arc slot; 4125, straight limit slot; 4126, pull rod; 4127, through slot; 4128, card ball; 4129, ball slot; 4311, pressure plate; 4312, arc surface; 4313, card strip; 4314, strip slot; 4315, first magnetic block; 4316, second magnetic block; 4321, first connecting rod; 4322, second connecting rod. DETAILED DESCRIPTION

[0020] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0021] Example: Figures 1 to 9 As shown, a roller limiting structure according to an embodiment of the present invention is shown in Figure 1 , Figure 2 , Figure 3 , including: seat blocks 1, which are arranged in pairs and are slidably connected to the roller press; and rollers 2 rotatably arranged between the two seat blocks 1; also including: a limiting mechanism 3 arranged on the seat blocks 1; and a driving mechanism 4 arranged on the limiting mechanism 3, and the driving mechanism 4 is used to control the limiting mechanism 3 to adjust the distance between the two rollers 2.

[0022] Specifically, when the distance between two adjacent rollers 2 on the roller press needs to be adjusted, the distance between the limiting mechanism 3 and the seat block 1 is controlled by the driving mechanism 4, thereby adjusting the distance between the two rollers 2.

[0023] like Figures 1 to 9 As shown, the limiting mechanism 3 includes: a limiting plate 31 arranged on the side of the seat block 1, the limiting plate 31 is fixedly connected to the roller press; and a pad 32 arranged between the seat block 1 and the limiting plate 31. The number of the pads 32 increases or decreases according to the distance adjusted by the roller 2.

[0024] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 The driving mechanism 4 includes an adjusting component 41, and the adjusting component 41 includes: a moving part 411 arranged on the limiting plate 31; and a control part 412 arranged on the moving part 411, and a semi-straight groove 33 is opened on the pad 32; the moving part 411 is slidably connected with the semi-straight groove 33, and the moving part 411 is slidably arranged in the seat block 1.

[0025] Specifically, the control member 412 can control the moving member 411 to move on the seat block 1. When the moving member 411 moves within the seat block 1, the number of pads 32 between the seat block 1 and the limiting plate 31 can be increased or decreased, thereby adjusting the position of the roller 2.

[0026] Please refer to Figure 3 ,Figure 4 , Figure 5 , Figure 6 The movable member 411 includes: a sliding rod 4112 sliding in a fixed groove 4111, wherein the fixed groove 4111 is provided in the seat block 1 and the limiting plate 31; and a clamping block 4114 placed in a clamping groove 4113, wherein the clamping groove 4113 is provided in the limiting plate 31, wherein the clamping groove 4113 is provided on a side of the fixed groove 4111, and the clamping block 4114 is fixedly connected to an outer wall of the sliding rod 4112.

[0027] Specifically, the size of the fixed groove 4111 is adapted to the size of the semi-straight groove 33 , the clamping block 4114 prevents the slide bar 4112 from rotating, and the clamping block 4114 fixes the slide bar 4112 to the limiting plate 31 .

[0028] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , the control element 412 includes: A driving rod 4122 is placed in a rotating groove 4121, wherein the rotating groove 4121 is provided in the sliding rod 4112, and the driving rod 4122 can rotate in the rotating groove 4121; a rotating plate 4123 is fixedly connected to the end of the driving rod 4122, wherein the rotating plate 4123 is rotatably connected to the sliding rod 4112; an arc groove 4124 is provided on the rotating plate 4123; a pull rod 4126 sliding in a straight limit groove 4125, wherein the straight limit groove 4125 is provided in the sliding rod 4112; a locking ball 4128 sliding on the through groove 4127, the through groove 4127 is opened in the sliding rod 4112, the limiting straight groove 4125 is connected with the through groove 4127, one end of the pull rod 4126 is placed in the arc groove 4124, and the other end of the pull rod 4126 passes through the limiting straight groove 4125 and is fixedly connected with the locking ball 4128; and a ball groove 4129 is opened on the side of the fixed groove 4111, and the locking ball 4128 is adapted to the ball groove 4129.

[0029] Specifically, two arc grooves 4124 are opened on the rotating plate 4123, and two corresponding pull rods 4126 and locking balls 4128 are each provided. By providing two locking balls 4128, it is beneficial to make the connection between the adjustment component 41 and the seat block 1 more stable. One end of the pull rod 4126 is placed in the arc groove 4124, and the other end of the pull rod 4126 passes through the limiting straight groove 4125 and is fixedly connected with the locking ball 4128. The distance between adjacent ball grooves 4129 is adapted to the thickness of the pad 32.

[0030] Specifically, when the distance between the rollers 2 is fixed, one end of the pull rod 4126 is placed at the outer end of the arc groove 4124, the other end of the pull rod 4126 passes through the outer end of the limiting straight groove 4125, one end of the clamping ball 4128 is placed in the ball groove 4129, and the other end of the clamping ball 4128 is placed in the through groove 4127. At this time, the adjustment component 41 is fixed to the seat block 1, and then the position of the limiting component and the seat block 1 is fixed, and the position of the roller 2 cannot be adjusted; when it is necessary to adjust the position of the roller 2, the driving rod 4122 is rotated, and the driving rod 4122 rotates to drive the rotating plate 4123 and the arc groove 4124 to rotate, and the arc groove 4124 rotates to drive the pull rod 4126 and the clamping ball 4128 to move along the limiting straight groove 4125 toward the center of the axis of the driving rod 4122. When one end of the pull rod 4126 is placed When at the inner end of the arc groove 4124, the locking ball 4128 disengages from the ball groove 4129 and completely enters the through groove 4127. At this time, the adjusting component 41 and the seat block 1 are no longer fixed, and the seat block 1 and the roller 2 can be moved. The movement of the seat block 1 changes the distance between the seat block 1 and the limiting plate 31. At this time, the number of pads 32 between the seat block 1 and the limiting plate 31 can be increased or decreased according to the position adjustment of the roller 2. Since one end of the semi-straight groove 33 is placed on the pad 32 and the other end of the semi-straight groove 33 passes through the pad 32, when the installation space is limited, there is no need to completely separate the adjusting component 41 from the seat block 1. Only the adjusting component 41 needs to be moved in the seat block 1 to realize the replacement of the pad 32, and the position adjustment and limitation of the roller 2 can be realized.

[0031] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 The driving mechanism 4 also includes a rotation limiting component 42, which includes: a fixed plate 422 that slides in a plate slot 421, wherein the plate slot 421 is provided on a driving rod 4122; a limiting spring 423 fixed to the fixed plate 422, wherein one end of the limiting spring 423 is fixed to the fixed plate 422, and the other end of the limiting spring 423 is fixed to the bottom surface of the plate slot 421; and a fixed slot 424 provided on a side wall of the rotating slot 4121, wherein the fixed slot 424 is adapted to the fixed plate 422.

[0032] Specifically, when the distance between the rollers 2 is fixed, the limiting spring 423 is in a normal state, one end of the fixed plate 422 is placed in the fixed groove 424, and the other end of the fixed plate 422 is placed in the plate groove 421. At this time, the driving rod 4122 is limited and cannot rotate. When the position of the roller 2 needs to be adjusted, the staff presses the fixed plate 422, and the fixed plate 422 moves toward the axis of the driving rod 4122, and the limiting spring 423 contracts. When the fixed plate 422 is separated from the fixed groove 424, the driving rod 4122 can rotate to drive the rotating plate 4123 and the arc groove 4124 to rotate. The rotation limiting component 42 can prevent the driving rod 4122 from being accidentally touched and causing the driving rod 4122 to rotate, resulting in the loosening of the connection between the adjustment component 41 and the seat block 1, and then causing the roller 2 to move when fixed.

[0033] Please refer to Figure 2 , Figure 8 , Figure 9 The driving mechanism 4 also includes a card-turning component 43, which includes: a card-turning piece 431 set in a pressure transfer groove 433, the pressure transfer groove 433 is opened in the limiting plate 31, the card-turning piece 431 is movably connected in the pressure transfer groove 433, and two groups of the card-turning pieces 431 are symmetrically arranged on the side of the driving rod 4122; and a connecting piece 432 is arranged between the two groups of the card-turning pieces 431, and the two groups of the card-turning pieces 431 cooperate with the connecting piece 432 to clamp the driving rod 4122 for rotation.

[0034] Specifically, the problem that the adjustment component 41 is difficult to control when the space adjacent to the roller 2 is small can be avoided by using the locking component 43.

[0035] Please refer to Figure 2 , Figure 8 , Figure 9 The rotating member 431 includes: a pressure plate 4311 arranged on the side of the driving rod 4122; an arc surface 4312 arranged on the pressure plate 4311, the arc surface 4312 is adapted to the driving rod 4122, and the arc surface 4312 is located directly above the fixed plate 422; a clamping strip 4313 fixedly connected to the arc surface 4312, a groove 4314 is provided on the driving rod 4122, and the clamping strip 4313 is adapted to the groove 4314; a first magnetic block 4315 fixedly connected to the upper wall of the pressure plate 4311; and a second magnetic block 4316 fixedly connected to the rotating pressure groove 433, and the first magnetic block 4315 can be adsorbed with the second magnetic block 4316.

[0036] Please refer to Figure 2 , Figure 8 , Figure 9The connecting member 432 includes: a first connecting rod 4321 fixedly connected to one of the pressure plates 4311; and a second connecting rod 4322 arranged on the first connecting rod 4321, the first connecting rod 4321 is slidably connected to the second connecting rod 4322, and the second connecting rod 4322 is fixedly connected to another pressure plate 4311.

[0037] Specifically, the axis of the pressure transfer groove 433 is at the same position as the axis of the driving rod 4122, the angles at both ends of the pressure transfer groove 433 are matched with the angles at both ends of the arc groove 4124, and the connecting piece 432 is used to connect the two pressure plates 4311. When the adjacent space of the rollers 2 is small, when the distance between the rollers 2 is fixed, the first magnetic block 4315 is adsorbed and connected with the second magnetic block 4316. At this time, the pressure plate 4311 is placed at the uppermost end of the pressure transfer groove 433, and the distance between the first connecting rod 4321 and the second connecting rod 4322 is the maximum value at this time. When the position of the roller 2 needs to be adjusted, the two pressure plates 4311 are moved toward the axis of the driving rod 4122. At this time, the first magnetic block 4315 is separated from the second magnetic block 4316, and the first connecting rod 4322 is connected to the driving rod 4122. When the distance between 4321 and the second connecting rod 4322 is shortened, the pressure plate 4311 moves toward the axis of the driving rod 4122, driving the fixed plate 422 to move toward the axis of the driving rod 4122. When the arc surface 4312 fits the outer wall of the driving rod 4122, the fixed plate 422 completely enters the plate groove 421, and the clamping strip 4313 enters the strip groove 4314. At this time, the pressure plate 4311 is rotated, and the pressure plate 4311 rotates in the rotation groove 433 with the axis of the driving rod 4122. The rotation of the pressure plate 4311 drives the driving rod 4122 to rotate, thereby enabling the limiting mechanism 3 to adjust the position of the roller 2 and limit the roller 2. Furthermore, through the clamping assembly 43, when the adjacent space of the roller 2 is small, the position of the roller 2 can be easily adjusted.

[0038] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A roller limiting structure, comprising: Seat blocks (1), the seat blocks (1) being arranged in pairs, and the seat blocks (1) being slidably connected to the roller press; and a roller (2) rotatably arranged between the two seat blocks (1); characterized in that it also includes: a limiting mechanism (3) disposed on the seat block (1); and a driving mechanism (4) disposed on the limiting mechanism (3), the driving mechanism (4) being used to control the limiting mechanism (3) to adjust the distance between the two rollers (2); the driving mechanism (4) comprising an adjusting component (41), the limiting mechanism (3) comprising: a limiting plate (31) disposed on the side of the seat block (1), the adjusting component (41) comprising: a moving part disposed on the limiting plate (31); (411); the moving member (411) comprises: a sliding rod (4112) sliding in a fixed groove (4111), wherein the fixed groove (4111) is provided in the seat block (1) and the limiting plate (31); and a clamping block (4114) disposed in a clamping groove (4113), wherein the clamping groove (4113) is provided in the limiting plate (31), wherein the clamping groove (4113) is provided on a side of the fixed groove (4111), and wherein the clamping block (4114) is fixedly connected to an outer wall of the sliding rod (4112).

2. A roller limiting structure according to claim 1, characterized in that: The limiting plate (31) is fixedly connected to the roller press; and a pad (32) is arranged between the seat block (1) and the limiting plate (31).

3. A roller limiting structure according to claim 2, characterized in that: The adjustment component (41) comprises: a control member (412) arranged on the moving member (411); a semi-straight groove (33) is provided on the backing plate (32); and the moving member (411) is slidably connected to the semi-straight groove (33); the moving member (411) is slidably arranged in the seat block (1).

4. A roller limiting structure according to claim 3, characterized in that: The control member (412) comprises: a driving rod (4122) disposed in a rotating groove (4121), wherein the rotating groove (4121) is provided in a sliding rod (4112), and the driving rod (4122) is capable of rotating in the rotating groove (4121); a rotating plate (4123) fixedly connected to the end of the driving rod (4122), wherein the rotating plate (4123) is rotatably connected to the sliding rod (4112); an arc groove (4124) provided on the rotating plate (4123); a pulling rod (4126) sliding in a straight limit groove (4125), wherein the straight limit groove (4125) is provided in a direction opposite to the straight limit groove (4125); ) is provided in the slide bar (4112); a locking ball (4128) sliding on the through groove (4127), the through groove (4127) is provided in the slide bar (4112), the straight limit groove (4125) and the through groove (4127) are connected, one end of the pull rod (4126) is placed in the arc groove (4124), and the other end of the pull rod (4126) passes through the straight limit groove (4125) and is fixedly connected to the locking ball (4128); and a ball groove (4129) is provided on the side of the fixing groove (4111), and the locking ball (4128) is adapted to the ball groove (4129).

5. A roller limiting structure according to claim 4, characterized in that: The driving mechanism (4) further comprises a rotation limiting assembly (42), the rotation limiting assembly (42) comprising: a fixed plate (422) sliding in a plate groove (421), the plate groove (421) being provided on the driving rod (4122); a limiting spring (423) fixedly connected to the fixed plate (422), one end of the limiting spring (423) being fixedly connected to the fixed plate (422), and the other end of the limiting spring (423) being fixedly connected to the bottom surface of the plate groove (421); and a fixed groove (424) being provided on a side wall of the rotating groove (4121), the fixed groove (424) being adapted to fit the fixed plate (422).

6. A roller limiting structure according to claim 5, characterized in that: The driving mechanism (4) further comprises a card rotation assembly (43), the card rotation assembly (43) comprising: a card rotation piece (431) disposed in a pressure groove (433), the pressure groove (433) being provided in the limiting plate (31), the card rotation piece (431) being movably connected in the pressure groove (433), two groups of the card rotation pieces (431) being symmetrically disposed on the side of the driving rod (4122); and a connecting piece (432) disposed between the two groups of the card rotation pieces (431), the two groups of the card rotation pieces (431) cooperating with the connecting piece (432) to clamp the driving rod (4122) for rotation.

7. The roller limiting structure according to claim 6, characterized in that: The rotating member (431) comprises: a pressure plate (4311) arranged on the side of the driving rod (4122); an arc surface (4312) arranged on the pressure plate (4311), the arc surface (4312) being matched with the driving rod (4122), and the arc surface (4312) being located directly above the fixed plate (422); a clamping strip (4313) fixedly connected to the arc surface (4312), a strip groove (4314) being provided on the driving rod (4122), and the clamping strip (4313) being matched with the strip groove (4314); a first magnetic block (4315) fixedly connected to the upper wall of the pressure plate (4311); and a second magnetic block (4316) fixedly connected to the rotating groove (433), and the first magnetic block (4315) can be adsorbed with the second magnetic block (4316).

8. The roller limiting structure according to claim 7, characterized in that: The connecting member (432) comprises: a first connecting rod (4321) fixedly connected to one of the pressing plates (4311); and a second connecting rod (4322) arranged on the first connecting rod (4321), the first connecting rod (4321) and the second connecting rod (4322) being slidably connected, and the second connecting rod (4322) being fixedly connected to another pressing plate (4311).

Citation Information

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