Passive roller device and cutting machine

Abstract

The invention relates to the field of cutting machines, and discloses a passive roller device and a cutting machine. The passive roller device comprises a driven shaft body, a shaft seat, a first rubber ring, a first bearing and a driven turntable; the driven shaft body is provided with a fixed shaft section and a first assembly shaft section, and the fixed shaft section is fixedly connected with the shaft seat; the first assembling shaft section is sequentially sleeved with a plurality of driven rotating discs in the length direction, a gap is reserved between every two adjacent driven rotating discs, and each driven rotating disc is rotationally connected with the first assembling shaft section through a first bearing; the outer circumferential face of each driven rotary disc is sleeved with a first rubber ring, a positioning structure is arranged between each first rubber ring and the corresponding driven rotary disc, and the outer circumferential face of each first rubber ring is annularly provided with a first containing groove used for containing a bead wire saw. The device has the advantages that the multi-strand bead string wire saw can be passively driven to move, so that the working energy consumption and the implementation cost are reduced, and the bead string wire saw of an annular structure can be conveniently mounted.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, specifically to a passive roller device and a cutting machine. Background Technology

[0002] A beaded wire saw is a cutting tool with diamond beads spaced on a looped steel wire rope. It is suitable for cutting various hard materials and is currently mainly used in stone mining, construction, and slab cutting.

[0003] A wire saw cutting machine is a device used to drive a beaded wire saw to perform linear motion to achieve a cutting function. For example, Chinese invention patent application CN202310163266.7, filed on February 24, 2023, discloses a wire saw cutting device and method for granite slabs. However, existing wire saw cutting machines typically only drive one beaded wire saw, resulting in low cutting efficiency. Furthermore, because the beaded wire saw has a ring structure, installation is inconvenient. Additionally, existing rollers all require a power mechanism, leading to high energy consumption and implementation costs. Therefore, there is an urgent need for a passive roller device that can passively drive multiple beaded wire saws while facilitating their installation, thereby reducing energy consumption and implementation costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a passive roller device and cutting machine that can passively drive a multi-strand beaded wire saw to move, thereby reducing energy consumption and implementation costs, and also facilitates the installation of the ring-shaped beaded wire saw.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, a passive roller device includes a passive shaft, a bearing seat, a first rubber ring, a first bearing, and a passive turntable;

[0007] The passive shaft has a fixed shaft section and a first assembly shaft section, with the fixed shaft section fixedly connected to the shaft seat; a plurality of passive turntables are sequentially sleeved on the first assembly shaft section along its length, with a gap between two adjacent passive turntables, and each passive turntable is rotatably connected to the first assembly shaft section through a first bearing; a first rubber ring is sleeved on the outer circumference of each passive turntable, and a positioning structure is provided between the first rubber ring and the passive turntable, and a first receiving groove for accommodating a beaded wire saw is provided on the outer circumference of each first rubber ring.

[0008] Furthermore, the first assembly shaft section is equipped with waterproof discs at both ends for limiting and waterproofing functions; waterproof structures are provided between the waterproof discs and the passive turntables, as well as between two adjacent passive turntables.

[0009] Furthermore, the waterproof structure includes a plurality of first embedded concave rings and a plurality of first embedded convex rings disposed on both sides of the passive turntable and on the surface of the waterproof disc facing the passive turntable. The first embedded concave rings and the first embedded convex rings on the opposing sides of two adjacent passive turntables are interlocked together, and the first embedded concave rings and the first embedded convex rings on the opposing side of the waterproof disc and the passive turntable are interlocked together.

[0010] Furthermore, a limiting protrusion is formed on the passive shaft body between the fixed shaft section and the first assembly shaft section, and the waterproof disc near one end of the fixed shaft section abuts against the limiting protrusion.

[0011] Furthermore, the free end of the first assembly shaft section has a threaded section, and a locking nut is provided on the threaded section, which presses against the waterproof disc close to the free end of the first assembly shaft section.

[0012] Furthermore, the positioning structure includes a second embedded concave ring disposed around the outer circumference of the passive turntable and a second embedded convex ring disposed around the inner circumference of the first rubber ring, wherein the second embedded convex ring is embedded in the second embedded concave ring.

[0013] The cross-section of the second embedded concave ring, from shallow to deep, includes a narrowed cavity segment, a straight cavity segment, and an inverted trapezoidal cavity segment, with the transition position between the straight cavity segment and the inverted trapezoidal cavity segment forming a limiting step; the shape of the second embedded convex ring matches that of the second embedded concave ring.

[0014] Furthermore, the bearing includes a first body and a second body, with a shaft hole through the first body, through which a fixed shaft segment passes and is locked to the second body.

[0015] Furthermore, a limiting hole is provided on the second base body, and a limiting part is formed at the free end of the fixed shaft section that is inserted into the limiting hole.

[0016] Furthermore, the passive turntable is an aluminum disc, and the passive shaft has a hollow structure.

[0017] Secondly, a cutting machine comprising the aforementioned passive roller device.

[0018] By adopting the above-described technical solution of the present invention, at least the following beneficial effects are achieved:

[0019] 1. A passive turntable is rotatably connected to a first assembly shaft section via a first bearing. A first rubber ring is fitted on the outer circumference of the passive turntable, and a first receiving groove for accommodating the beaded wire saw is provided on the outer circumference of the first rubber ring. This ensures that during actual use, when the beaded wire saw is driven by a roller device with a power mechanism, the passive turntable and the first rubber ring can rotate passively under the drive of the beaded wire saw, thereby ensuring smooth transmission and cutting function of the beaded wire saw. Therefore, by using this passive roller device in conjunction with a roller device with a power mechanism, the number of power mechanisms required can be reduced while ensuring that the normal transmission and cutting function of the beaded wire saw are not affected, thus reducing energy consumption and implementation costs.

[0020] 2. Several passive turntables are sequentially mounted along the length of the first assembly shaft section, with gaps between adjacent passive turntables. Each passive turntable has a first rubber ring mounted on its outer circumference, and each first rubber ring has a first receiving groove on its outer circumference for accommodating the beaded wire saw. This allows the passive roller device to passively drive multiple beaded wire saws to move together during actual use, thereby improving cutting efficiency. At the same time, adjacent passive turntables do not interfere with each other, which prevents adjacent first rubber rings from pulling on each other, thus extending the service life of the first rubber rings.

[0021] 3. The passive shaft is designed with a fixed shaft section and a first assembly shaft section, and the fixed shaft section is fixedly connected to the shaft seat. In actual use, the fixed shaft section and the shaft seat can be used to reliably support the entire passive shaft, so that the first assembly shaft section can be suspended in the air, thereby facilitating the disassembly and assembly of the first rubber ring and the ring structure beaded wire saw.

[0022] 4. By equipping both ends of the first assembly shaft section with waterproof discs for limiting and waterproofing functions, and by setting waterproof structures between two adjacent passive turntables, water and dust can be prevented from entering the first bearing during actual use, thereby avoiding adverse effects on the first bearing and ensuring that each passive turntable can rotate smoothly during use. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of the passive roller device of the present invention;

[0024] Figure 2 This is a cross-sectional view of the passive roller device of the present invention;

[0025] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0026] Figure 4 This is a detailed structural diagram of the second embedded concave ring of the present invention;

[0027] Figure 5 This is a structural diagram of the passive shaft of the present invention;

[0028] Figure 6 This is a structural diagram of the passive turntable of the present invention;

[0029] Figure 7 This is a structural diagram of the waterproof tray of the present invention;

[0030] Figure 8 This is a structural diagram of the bearing seat of the present invention;

[0031] Figure 9 This is an overall structural diagram of the cutting machine of the present invention;

[0032] Figure 10 This is a cross-sectional view of the active roller device of the present invention after removing the active roller device;

[0033] Figure label:

[0034] Passive roller device 100;

[0035] Cutting machine 200;

[0036] Passive shaft 1, fixed shaft section 11, limiting part 111, first assembly shaft section 12, threaded section 121, limiting protrusion ring 13;

[0037] Shaft seat 2, first seat body 21, shaft hole 211, second seat body 22, limiting hole 221;

[0038] First rubber ring 3, first receiving groove 31;

[0039] First bearing 4;

[0040] Passive turntable 5;

[0041] Positioning structure 61, second embedded concave ring 611, narrowing cavity section 6111, straight cavity section 6112, inverted trapezoidal cavity section 6113, limiting step 6114, second embedded convex ring 612, waterproof disc 62, waterproof structure 63, first embedded concave ring 631, first embedded convex ring 632, locking nut 64.

[0042] Active roller device 7, roller drive assembly 71, spindle box 72, drive shaft body 73, support shaft section 731, second assembly shaft section 732, transmission roller 74, second bearing 75, second rubber ring 76, second receiving groove 761;

[0043] Rack 8;

[0044] First lifting mechanism 91, second lifting mechanism 92, tensioning mechanism 93, lifting slide 94. Detailed Implementation

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1

[0047] Please see the appendix Figures 1 to 8 As shown, the present invention provides a passive roller device 100, which includes a passive shaft 1, a shaft seat 2, a first rubber ring 3, a first bearing 4, and a passive turntable 5;

[0048] The passive shaft 1 has a fixed shaft section 11 and a first assembly shaft section 12. The fixed shaft section 11 is fixedly connected to the shaft seat 2, meaning that the fixed shaft section 11 cannot rotate relative to the shaft seat 2. Several passive turntables 5 are sequentially sleeved on the first assembly shaft section 12 along its length. There is a gap between two adjacent passive turntables 5. Each passive turntable 5 is rotatably connected to the first assembly shaft section 12 through a first bearing 4, so that each passive turntable 5 can rotate independently relative to the first assembly shaft section 12, and two adjacent passive turntables 5 will not affect each other. A first rubber ring 3 is sleeved on the outer circumference of each passive turntable 5, and a positioning structure 61 is provided between the first rubber ring 3 and the passive turntable 5 to position the first rubber ring 3 on the passive turntable 5, so that the first rubber ring 3 will not shift during use. A first receiving groove 31 for accommodating a beaded wire saw is provided on the outer circumference of each first rubber ring 3.

[0049] By adopting the above-described technical solution of the present invention, at least the following beneficial effects are achieved:

[0050] 1. The passive turntable 5 is rotatably connected to the first assembly shaft section 12 via the first bearing 4. A first rubber ring 3 is fitted on the outer circumference of the passive turntable 5, and the outer circumference of the first rubber ring 3 is provided with a first receiving groove 31 for accommodating the beaded wire saw. In actual use, when the beaded wire saw is driven by the roller device with the power mechanism, the passive turntable 5 and the first rubber ring 3 can be passively rotated under the drive of the beaded wire saw, thereby ensuring that the beaded wire saw can smoothly transmit and achieve the cutting function. Therefore, by using the passive roller device 100 together with the roller device with the power mechanism, the number of power mechanisms used can be reduced while ensuring that the normal transmission of the beaded wire saw to achieve the cutting function is not affected, thereby reducing working energy consumption and implementation costs.

[0051] 2. Several passive turntables 5 are sequentially mounted along the length of the first assembly shaft section 12. A gap is left between two adjacent passive turntables 5, and a first rubber ring 3 is mounted on the outer circumference of each passive turntable 5. A first receiving groove 31 for accommodating the beaded wire saw is provided on the outer circumference of each first rubber ring 3. This allows the passive roller device 100 to passively drive multiple beaded wire saws to move together during actual use, thereby helping to improve cutting efficiency. At the same time, two adjacent passive turntables 5 will not affect each other, which prevents adjacent first rubber rings 3 from pulling on each other, thereby improving the service life of the first rubber rings 3.

[0052] 3. The passive shaft 1 is designed with a fixed shaft section 11 and a first assembly shaft section 12, and the fixed shaft section 11 is fixedly connected to the shaft seat 2. In the process of use, the fixed shaft section 11 and the shaft seat 2 can be used to reliably support the entire passive shaft 1, so that the first assembly shaft section 12 can be suspended, thereby facilitating the disassembly and assembly of the first rubber ring 3 and the ring structure beaded wire saw.

[0053] In some embodiments of the present invention, the two ends of the first assembly shaft section 12 are provided with waterproof discs 62 for limiting and waterproofing functions. That is, in specific implementation of the present invention, the waterproof discs 62 can both limit the passive turntables 5 located at both ends of the first assembly shaft section 12 and waterproof them. Waterproof structures 63 are provided between the waterproof discs 62 and the passive turntables 5 and between two adjacent passive turntables 5 to achieve a waterproofing effect.

[0054] Heat and dust are generated during the cutting of stone and other materials using a wire saw, which affects the cutting effect. Therefore, to ensure the cutting effect, water needs to be continuously sprayed during actual processing to remove heat and dust. Since each passive turntable 5 in this invention is rotatably connected to the first assembly shaft section 12 via the first bearing 4, if water and dust enter the first bearing 4, it can easily cause the first bearing 4 to malfunction. To address this, this invention provides waterproof discs 62 at both ends of the first assembly shaft section 12 for limiting and waterproofing functions. Waterproof structures 63 are also provided between the waterproof discs 62 and the passive turntables 5, as well as between adjacent passive turntables 5. This allows the waterproof discs 62 and waterproof structures 63 to prevent water and dust from entering the first bearing 4 during use, thus avoiding adverse effects on the first bearing 4 and ensuring smooth rotation of each passive turntable 5 during operation.

[0055] As one specific embodiment of the present invention, please refer to the following: Figure 3 , Figure 6 and Figure 7 As shown, the waterproof structure 63 includes a plurality of first embedded concave rings 631 and a plurality of first embedded convex rings 632 disposed on both sides of the passive turntable 5 and on the surface of the waterproof disc 62 facing the passive turntable 5. The first embedded concave rings 631 and first embedded convex rings 632 on the facing sides of two adjacent passive turntables 5 are interlocked. Similarly, the first embedded concave rings 631 and first embedded convex rings 632 on the facing sides of the waterproof disc 62 and the passive turntable 5 are interlocked. This structural design ensures that, during actual use, each passive turntable 5 can rotate independently and smoothly, while the interlocked first embedded concave rings 631 and first embedded convex rings 632 prevent water and dust from entering the first bearing 4.

[0056] In some embodiments of the present invention, such as Figure 5 As shown, a limiting protrusion ring 13 is formed on the passive shaft 1 between the fixed shaft section 11 and the first assembly shaft section 12 to achieve a limiting function. The waterproof disc 62 near one end of the fixed shaft section 11 abuts against the limiting protrusion ring 13 to limit the waterproof disc 62 and ensure that the waterproof disc 62 cannot move axially after assembly, thereby ensuring the waterproof effect.

[0057] In some embodiments of the present invention, please refer to the following: Figure 2 and Figure 5As shown, the free end of the first assembly shaft section 12 has a threaded section 121, on which a locking nut 64 is fitted. The locking nut 64 presses against the waterproof disc 62 near the free end of the first assembly shaft section 12, thereby limiting the waterproof disc 62 and ensuring that it cannot move axially after assembly, thus guaranteeing the waterproof effect. Simultaneously, because a limiting protrusion 13 is provided between the first assembly shaft section 12 and the fixed shaft section 11, combined with the structural design of the threaded section 121 and the locking nut 64 at the free end of the first assembly shaft section 12, it is possible to conveniently install the first bearing 4 and the passive turntable 5 from the free end of the first assembly shaft section 12 onto the first assembly shaft section 12, while also achieving reliable limiting through the cooperation of the limiting protrusion 13 and the locking nut 64.

[0058] In some embodiments of the present invention, please refer to the following: Figure 3 and Figure 4 As shown, the positioning structure 61 includes a second embedded concave ring 611 encircling the outer circumferential surface of the passive turntable 5 and a second embedded convex ring 612 encircling the inner circumferential surface of the first rubber ring 3. The second embedded convex ring 612 is embedded in the second embedded concave ring 611, so that the cooperation of the second embedded convex ring 612 and the second embedded concave ring 611 can reliably limit the first rubber ring 3 and ensure that the first rubber ring 3 will not move during use.

[0059] The cross-section of the second embedded concave ring 611, from shallow to deep, includes a narrow cavity section 6111, a straight cavity section 6112, and an inverted trapezoidal cavity section 6113. The transition position between the straight cavity section 6112 and the inverted trapezoidal cavity section 6113 forms a limiting step 6114. The narrow cavity section 6111 is relatively wide near the outer circumference of the passive turntable 5, which facilitates actual installation operations. The limiting step 6114 at the transition position between the straight cavity section 6112 and the inverted trapezoidal cavity section 6113 can reliably limit the second embedded convex ring 612. The shape of the second embedded convex ring 612 matches that of the second embedded concave ring 611. By adopting the above structural design, the stability of the first rubber ring 3 after assembly can be effectively improved, ensuring that the first rubber ring 3 will not detach from the passive turntable 5 without human intervention.

[0060] In some embodiments of the present invention, please refer to the following: Figure 8 As shown, the bearing seat 2 includes a first seat body 21 and a second seat body 22. A shaft hole 211 is provided through the first seat body 21, and the fixed shaft segment 11 passes through the shaft hole 211 and is locked to the second seat body 22. Because a limiting protrusion ring 13 is provided between the fixed shaft segment 11 and the first assembly shaft segment 12, after the free end of the fixed shaft segment 11 is locked onto the second seat body 22, the limiting protrusion ring 13 can press against the first seat body 21, that is, the limiting protrusion ring 13 can also limit the assembly of the fixed shaft segment 11.

[0061] Furthermore, in order to ensure that the free end of the fixed shaft segment 11 can be more reliably combined with the second seat 22, so that the shaft seat 2 can reliably support the entire passive shaft 1, a limiting hole 221 is provided on the second seat 22, and a limiting part 111 is formed at the free end of the fixed shaft segment 11 that is inserted into the limiting hole 221.

[0062] In some embodiments of the present invention, the passive turntable 5 is an aluminum disc and the passive shaft 1 has a hollow structure, which makes the entire passive roller device 100 lighter.

[0063] Example 2

[0064] Please see the appendix Figures 1 to 10 As shown, the present invention provides a cutting machine 200, which includes a passive roller device 100, an active roller device 7, a frame 8, and a beaded wire saw (not shown). Two sets of passive roller devices 100 and active roller devices 7 are mounted on the frame 8, with the active roller device 7 in the same set located below the passive roller device 100. Multiple strands of beaded wire saws are mounted on each passive roller device 100 and active roller device 7. During operation, the passive roller device 100 and active roller device 7 work together to drive the multiple strands of beaded wire saws, thereby improving cutting efficiency. The specific structure and technical effects of the passive roller device 100 are exactly the same as in Embodiment 1; please refer to the detailed description of Embodiment 1 for further details, which will not be repeated here.

[0065] In a specific implementation of the present invention, the cutting machine 200 further includes a first lifting mechanism 91, a second lifting mechanism 92, and a tension adjustment mechanism 93. The passive roller device 100 and the active roller device 7 are both slidably connected to the frame 8 via a lifting slide 94. The first lifting mechanism 91 is connected between the lifting slide 94 of the passive roller device 100 and the lifting slide 94 of the active roller device 7. The second lifting mechanism 92 is connected between the frame 8 and the lifting slide 94 of the passive roller device 100. The tension adjustment mechanism 93 is located above or below the mesh surface formed by each strand of beaded wire saw and is connected to the frame 8. In operation, the cutting machine 200 of this invention utilizes a first lifting mechanism 91 to drive the corresponding active roller device 7 for lifting and adjustment, thereby enabling each strand of wire saw to form an inclined cutting mesh surface at the bottom of the two active roller devices 7, thus improving cutting sharpness. A second lifting mechanism 92 can also be used to drive the active roller device 7 and the passive roller device 100 together for lifting and lowering, thereby achieving cutting of stationary stone materials. Simultaneously, during processing, the tension adjustment mechanism 93 can be used to adjust the tension of each strand of wire saw to prevent the wire saw from being in a slack state, which would affect the cutting effect. In specific implementations, both the first lifting mechanism 91 and the second lifting mechanism 92 can be screw-driven lifting assemblies; the tension adjustment mechanism 93 can be a commonly used mechanism in the prior art, and will not be described in detail here.

[0066] In this invention, please refer to the following: Figure 10 As shown, the active roller device 7 includes a roller drive assembly 71, a spindle box 72, an active shaft body 73, a transmission roller 74, a second bearing 75, and a second rubber ring 76;

[0067] The drive shaft 73 has a support shaft section 731 and a second assembly shaft section 732. The main spindle box 72 is connected to the frame 8. The support shaft section 731 is rotatably connected to the main spindle box 72 via a second bearing 75, allowing the support shaft section 731 to rotate relative to the main spindle box 72. The free end of the support shaft section 731 extends to the outside of the main spindle box 72 and is connected to the roller drive assembly 71, so that the drive shaft 73 is driven to rotate by the roller drive assembly 71, which is connected to the frame 8. The transmission roller 74 is sleeved on the outside of the second assembly shaft section 732. It is connected to the second assembly shaft section 732, so that the second assembly shaft section 732 can drive the transmission roller 74 to rotate together. Several second rubber rings 76 are sleeved on the outside of the transmission roller 74 along the length direction. Each second rubber ring 76 has a second receiving groove 761 for accommodating the beaded wire saw on its outer circumference. During operation, the roller drive assembly 71 drives the drive shaft 73 to rotate. When the drive shaft 73 rotates, it can drive the transmission roller 74 and the second rubber rings 76 to rotate together, thereby driving the beaded wire saw to perform the cutting function.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A passive roller device, characterized in that, It includes a driven shaft, a bearing seat, a first rubber ring, a first bearing, and a driven turntable; The passive shaft has a fixed shaft section and a first assembly shaft section, with the fixed shaft section fixedly connected to the shaft seat; a plurality of passive turntables are sequentially sleeved on the first assembly shaft section along its length, with a gap between two adjacent passive turntables, and each passive turntable is rotatably connected to the first assembly shaft section through a first bearing; a first rubber ring is sleeved on the outer circumference of each passive turntable, and a positioning structure is provided between the first rubber ring and the passive turntable, and a first receiving groove for accommodating a beaded wire saw is provided on the outer circumference of each first rubber ring.

2. The passive roller device according to claim 1, characterized in that, The first assembly shaft section is equipped with waterproof discs at both ends for limiting and waterproofing functions; waterproof structures are provided between the waterproof discs and the passive turntables, as well as between two adjacent passive turntables.

3. The passive roller device according to claim 2, characterized in that, The waterproof structure includes a plurality of first embedded concave rings and a plurality of first embedded convex rings disposed on both sides of the passive turntable and on the side of the waterproof disc facing the passive turntable. The first embedded concave rings and the first embedded convex rings on the opposite sides of two adjacent passive turntables are interlocked together, and the first embedded concave rings and the first embedded convex rings on the opposite side of the waterproof disc and the passive turntable are interlocked together.

4. The passive roller device according to claim 2, characterized in that, A limiting protrusion is formed on the passive shaft body between the fixed shaft section and the first assembly shaft section, and the waterproof disc near one end of the fixed shaft section abuts against the limiting protrusion.

5. The passive roller device according to claim 2, characterized in that, The free end of the first assembly shaft section has a threaded section, and a locking nut is provided on the threaded section. The locking nut is used to press against the waterproof disc near the free end of the first assembly shaft section.

6. The passive roller device according to claim 1, characterized in that, The positioning structure includes a second embedded concave ring disposed on the outer circumferential surface of the passive turntable and a second embedded convex ring disposed on the inner circumferential surface of the first rubber ring, wherein the second embedded convex ring is embedded in the second embedded concave ring. The cross-section of the second embedded concave ring, from shallow to deep, includes a narrowed cavity segment, a straight cavity segment, and an inverted trapezoidal cavity segment, with the transition position between the straight cavity segment and the inverted trapezoidal cavity segment forming a limiting step; the shape of the second embedded convex ring matches that of the second embedded concave ring.

7. The passive roller device according to claim 1, characterized in that, The bearing includes a first body and a second body. A shaft hole is provided through the first body, and a fixed shaft section passes through the shaft hole and is locked to the second body.

8. The passive roller device according to claim 7, characterized in that, The second base has a limiting hole, and the free end of the fixed shaft section has a limiting part that can be inserted into the limiting hole.

9. The passive roller device according to claim 1, characterized in that, The passive turntable is an aluminum disc, and the passive shaft has a hollow structure.

10. A cutting machine, characterized in that, The cutting machine includes the passive roller device as described in any one of claims 1-9.

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