Concrete test block sample preparation cutting device

Abstract

The invention relates to the field of concrete durability test research, and discloses a concrete test block sample preparation cutting device which comprises a base and a supporting frame, the base is provided with a cutting cavity, the base is vertically and slidably connected with a lifting plate, the supporting frame is provided with a conveying belt, the base is provided with a reciprocating rotating shaft and an intermittent rotating shaft, and the reciprocating rotating shaft is linked with the lifting plate. The intermittent rotating shaft is in linkage with the reciprocating rotating shaft, the conveying belt is in linkage with the intermittent rotating shaft, and the intermittent rotating shaft intermittently rotates to drive the conveying belt to intermittently convey materials to the cutting cavity. The movable clamp intermittently slides to drive the lifting plate to intermittently slide up and down, and when the movable clamp slides towards one side of the fixed clamp and fixes materials, the lifting plate slides upwards to close the cutting cavity, so that gravel splashing in the material cutting process can be effectively prevented, and the safety of workers is protected; the movable clamp slides away from the fixed clamp and drives the lifting plate to slide downwards so as to open the cutting cavity, and the feeding condition in the cutting cavity can be observed conveniently.

Description

Technical Field

[0001] The present invention relates to the field of experimental research on concrete durability, and particularly to a cutting device for making concrete specimens. Background Art

[0002] Concrete specimens are important tools for detecting the strength of concrete in construction projects, and their production and application run through all aspects of concrete construction, testing, and quality control.

[0003] A Chinese patent with the authorization announcement number CN210148431U discloses a concrete specimen cutting device, which includes a cutting machine installed on a base. A fixed clamp and a movable clamp are provided at the end of the base. It is considered that the movable clamp is driven to fix the material to the fixed clamp. However, the double saw blades are manually moved to rotate relative to the base to cut the material. The setting of the double saw blades can ensure that the cutting surface of the specimen is parallel and does not affect the experiment. However, in the prior art, only manual feeding is possible during the cutting process of the material, resulting in low work efficiency. Summary of the Invention

[0004] The present invention aims to provide a cutting device for making concrete specimens to solve the problem of low efficiency caused by manual feeding.

[0005] To achieve the above object, the present invention adopts the following technical solution: A cutting device for making concrete specimens includes a base. The base is provided with a cutting chamber for cutting the material. The cutting machine is rotatably installed on one side of the cutting chamber. A lifting plate for opening and closing the cutting chamber is vertically slidably connected to the base. The movable clamp drives the lifting plate to slide. The device further includes a support frame. The support frame is provided with a conveyor belt for conveying the material to the cutting chamber. The base is installed with a reciprocating rotating shaft and an intermittent rotating shaft. The reciprocating rotating shaft is linked with the lifting plate. The lifting plate slides up and down to drive the reciprocating rotating shaft to rotate reciprocally. The intermittent rotating shaft is linked with the reciprocating rotating shaft. The conveyor belt is linked with the intermittent rotating shaft. The intermittent rotation of the intermittent rotating shaft is used to drive the conveyor belt to intermittently convey the material to the cutting chamber.

[0006] The beneficial effect of this solution is that when the movable clamp slides, the conveyor belt is driven through the linkage of the lifting plate, the reciprocating rotating shaft, and the intermittent rotating shaft. The intermittent sliding of the movable clamp drives the lifting plate to slide up and down intermittently. When the movable clamp slides towards the fixed clamp side and fixes the material, the lifting plate slides upward to close the cutting chamber. Compared with the prior art, it can effectively prevent the sand and gravel from splashing during the cutting process of the material, protecting the safety of the staff. At the same time, when the cutting stops, the movable clamp slides away from the fixed clamp and drives the lifting plate to slide down to open the cutting chamber, facilitating the observation of the feeding situation in the cutting chamber.

[0007] In addition, by setting a reciprocating rotating shaft and an intermittent rotating shaft, the intermittent rotating shaft is linked with the conveyor belt, and the reciprocating rotating shaft is linked with the lifting plate. Since the feeding of the material by the conveyor belt is unidirectional, the reciprocating rotating shaft inputs the power of the lifting plate and outputs it unidirectionally through the intermittent rotating shaft, finally realizing the unidirectional conveying of the conveyor belt. Compared with the prior art, manual feeding is not required, and time is saved during the operation of the device. When the moving fixture moves in the direction away from the fixed fixture, the cut test block is discharged. One end of the material to be cut is conveyed into the cutting cavity through the conveyor belt. The device can achieve the purpose of shielding the lifting plate and automatic feeding only by operating the moving fixture.

[0008] Preferably, as an improvement, a driving cavity is opened at the bottom end of the base. A driving block is horizontally slidably connected in the driving cavity. The base is equipped with a cylinder for sliding the driving block. A chute is obliquely arranged on the driving block. The bottom end of the lifting plate is slidably connected to the chute. A sliding cavity for the vertical sliding of the lifting plate is opened on the base, and the sliding cavity is communicated with the driving cavity.

[0009] The beneficial effect of this solution is that the cylinder drives the driving block to slide, and the driving block drives the lifting plate to slide up and down through the inclined plane, thereby realizing the intermittent opening and closing of the cutting cavity by the lifting plate.

[0010] Preferably, as an improvement, a feeding port for the material to enter is opened on one side of the cutting cavity close to the conveyor belt. A discharging cavity is opened at the bottom end of the base. The bottom end of the cutting cavity is open and communicated with the discharging cavity. Both the fixed fixture and the moving fixture are arranged at the bottom end of the cutting cavity. The driving block is connected to the moving fixture, and the driving block is used to drive the moving fixture to slide.

[0011] The beneficial effect of this solution is that after the concrete test block is cut and the moving fixture and the fixed fixture are separated, the test block naturally falls, and the test block falls from the cutting cavity into the discharging cavity. In the overall installation of the equipment, a collecting device for collecting the test block can be installed in the discharging cavity, so as to facilitate discharging and collection, without the participation of workers, improve work efficiency, and the rapid discharging is also convenient for the rapid feeding of the material.

[0012] Preferably, as an improvement, a linkage cavity is opened on the base. The linkage cavity is communicated with the sliding cavity. The reciprocating rotating shaft penetrates through the linkage cavity. A gear is coaxially arranged on the reciprocating rotating shaft. A rack is arranged on one side of the lifting plate close to the linkage cavity, and the rack meshes with the gear.

[0013] The beneficial effect of this solution is that the lifting plate slides up and down reciprocally and drives the reciprocating rotating shaft to rotate in the positive and negative directions through the rack and the gear, so as to realize the power input of the reciprocating rotating shaft.

[0014] Preferably, as an improvement, the intermittent rotating shaft is coaxially arranged with the reciprocating rotating shaft and sleeved outside the reciprocating rotating shaft. An intermittent driving mechanism is arranged between the inner wall of the intermittent rotating shaft and the outer wall of the reciprocating rotating shaft.

[0015] Preferably, as an improvement, the support frame is rotatably provided with a conveying rotating shaft for driving the conveyor belt to rotate. A first driving wheel and a first driven wheel which are in transmission connection are coaxially arranged on the intermittent rotating shaft and the conveying rotating shaft respectively, and the diameter of the first driving wheel is larger than that of the first driven wheel.

[0016] The beneficial effects of this solution are as follows: The first driving wheel and the first driven wheel are in gear train transmission, and differential transmission is achieved through the diameter difference. Adhering to the principles of material saving and economic saving, the size of the base should not be too large, which will result in a small sliding distance between the driving block and the lifting plate. For materials of different lengths and test blocks with different required lengths, by quickly rotating the conveyor belt, the materials of different lengths can be conveyed into the cutting cavity within the same time. For the materials that enter the cutting cavity faster, the end of the material can be made to abut against the inner wall of the cutting cavity under the continuous conveying of the conveyor belt, so as to make the positioning of the material more accurate.

[0017] Preferably, as an improvement, the support frame is provided with a plurality of clamping parts. Each clamping part includes an auxiliary clamp slidably connected to both sides of the support frame and a bidirectional lead screw rotatably connected to the support frame. The bidirectional lead screw is threadedly connected to the auxiliary clamp.

[0018] The beneficial effects of this solution are as follows: Due to the rotation characteristics of the reciprocating rotating shaft, the bidirectional lead screw is used to drive the auxiliary clamps on both sides to clamp the material. In the prior art, since the cutting machine is rotatably arranged on the base, when cutting the material, the saw blade of the cutting machine cuts the material obliquely downward. In the prior art, the material is only clamped and fixed by the fixed clamp and the moving clamp. However, for longer materials, when being cut under force, the material is likely to deflect at the clamped position, thus affecting the invariant between the test blocks and ultimately affecting the experimental results. In this solution, while the material is being clamped by the fixed clamp and the moving clamp and prepared for cutting, the reciprocating rotating shaft makes the auxiliary clamp clamp it, which can ensure that the material does not deflect during cutting and ensure the consistency of the invariant between the test blocks.

[0019] Preferably, as an improvement, the lead screws of a plurality of clamping parts are interlocked, and at least one of the lead screws of the plurality of clamping parts is interlocked with the reciprocating rotating shaft.

[0020] Preferably, as an improvement, a second driven wheel and a second driving wheel which are in transmission connection are coaxially arranged on at least one lead screw and the reciprocating rotating shaft respectively, and the diameter of the second driving wheel is larger than that of the second driven wheel.

[0021] The beneficial effects of this solution are as follows: The second driven wheel and the second driving wheel are in gear train transmission, and differential transmission is achieved through the size difference. Due to considering the principles of economic saving and material saving, the size of the base is small, that is, the number of turns of the reciprocating rotating shaft in the same time is small. Through differential transmission, the auxiliary clamp can quickly clamp the material.

[0022] Preferably, as a further improvement, a guide shaft for the movable fixture to slide is fixed in the blanking cavity, and the guide shaft can contact the upper surface of the test block.

[0023] The beneficial effects of this solution are as follows: Since the conveyor belt is linked with the intermittent rotating shaft, and the movement amounts of the lifting plate and the reciprocating rotating shaft are constant, the amount of material fed by the conveyor belt each time is constant. When the cutting machine is pulled up after cutting the material, the test blocks and the material on both outer sides of the cutting blade tilt upward. The end of the test block wears against the side wall of the cutting cavity. After the end of the material is pulled up, the whole material has a tendency to move backward. However, the material is clamped by the auxiliary fixture, and the material itself has a large inertia. The force exerted by the cutting machine to pull up the material is not enough to make the material move backward. Therefore, the force exerted by the cutting machine to pull up the material is entirely borne by the wear between the end of the test block and the cutting cavity. This increases variables for the test blocks, making several test blocks not all the same, thus affecting the experimental results. However, by setting the guide shaft to contact the upper surface of the test block, the test block can be effectively prevented from tilting upward, thereby avoiding wear and ensuring the consistency among several test blocks. Description of the Drawings

[0024] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0025] Figure 2 is the top view of the overall structure of the embodiment of the present invention;

[0026] Figure 3 is Figure 2 the sectional structural schematic diagram in the A-A direction in

[0027] Figure 4 is Figure 2 the sectional structural schematic diagram in the B-B direction in

[0028] Figure 5 is Figure 4 the partial structural schematic diagram of the cooperation between the intermittent rotating shaft and the reciprocating rotating shaft at C in

[0029] Figure 6 is Figure 4 the partial structural schematic diagram of the cooperation between the reciprocating rotating shaft and the lifting plate at D in Detailed Description of the Invention

[0030] The following is a further detailed description through specific embodiments:

[0031] The reference numerals in the attached drawings of the specification include: base 1, linkage cavity 10, cutting machine 11, reciprocating rotating shaft 12, second driving wheel 121, gear 122, intermittent rotating shaft 13, first driving wheel 131, cutting cavity 14, driving cavity 15, driving block 151, chute 1511, air cylinder 16, sliding cavity 17, lifting plate 171, rack 1711, fixed fixture 18, moving fixture 19, support frame 2, conveying rotating shaft 21, first driven wheel 211, clamping portion 22, auxiliary fixture 221, bidirectional lead screw 222, second driven wheel 2221, intermittent driving mechanism 3, blanking cavity 4, guiding shaft 41.

[0032] A concrete specimen preparation cutting device, as Figure 1 , Figure 3 shown, includes a base 1. At the top of the base 1, there is a cutting cavity 14 for cutting materials. The cutting cavity 14 includes three plate members perpendicularly and fixedly welded to the base 1 and a lifting plate 171 vertically and slidably connected to the base 1. At the bottom of the base 1, a blanking cavity 4 is opened below the cutting cavity 14. The bottom end of the cutting cavity 14 is open and connected to the blanking cavity 4. Horizontally, a driving cavity 15 is opened at the bottom of the base 1. A driving block 151 is horizontally and slidably connected in the driving cavity 15. On one side of the base 1 at the position of the driving cavity 15, an air cylinder 16 is installed. The end of the telescopic rod of the air cylinder 16 is connected to the driving block 151. The top of the driving block 151 is provided with an inclined surface, and a chute 1511 is opened on the inclined surface. Vertically, a sliding cavity 17 for the lifting plate 171 to be inserted and vertically slide is opened above the driving cavity 15 of the base 1. The sliding cavity 17 is connected to the driving cavity 15. A connecting rod is fixedly provided at the bottom end of the lifting plate 171, and the bottom end of the connecting rod is inserted and slidably connected in the chute 1511.

[0033] As Figures 2-3As shown in the figure, a fixed clamp 18 and a movable clamp 19 are respectively arranged at the top of the blanking cavity 4 of the base 1. The fixed clamp 18 is fixedly welded on the side of the top of the blanking cavity 4 opposite to the driving block 151. A guide shaft 41 is horizontally and fixedly installed at the top of the blanking cavity 4. The movable clamp 19 is horizontally slidably connected to the guide shaft 41. The movable clamp 19 is arranged opposite to the fixed clamp 18. A driving plate is fixedly welded between the driving block 151 and the movable clamp 19. The cylinder 16 expands and contracts, and drives the driving block 151 to horizontally slide in the driving cavity 15 through the telescopic rod. When the driving block 151 slides towards the blanking cavity 4, the driving block 151 drives the movable clamp 19 to move towards the fixed clamp 18 through the driving plate, and finally fixes the material between the movable clamp 19 and the fixed clamp 18. At the same time, the driving block 151 drives the inclined surface to move towards the blanking cavity 4. At this time, the chute 1511 drives the lifting plate 171 to slide upwards in the sliding cavity 17 and protrude from the top surface of the base 1, and finally closes the cutting cavity 14. When the cylinder 16 drives the driving block 151 to slide away from the blanking cavity 4, the lifting plate 171 descends and opens the cutting cavity 14. It can not only ensure that the cutting cavity 14 is closed during material cutting to prevent sand and muddy water from splashing, but also ensure that the operator can observe the cutting situation inside the cutting cavity 14 during the feeding and blanking processes, ensuring the safety of the operator and keeping the surface of the base 1 clean at the same time.

[0034] As Figures 4-6As shown in the figure, a linkage cavity 10 is also provided in the base 1. The linkage cavity 10 is communicated with the sliding cavity 17. The base 1 is rotatably connected with a reciprocating rotating shaft 12. The reciprocating rotating shaft 12 penetrates through the linkage cavity 10. A gear 122 is coaxially connected to the reciprocating rotating shaft 12 inside the linkage cavity 10. A rack 1711 is fixedly arranged on one side of the lifting plate 171 close to the linkage cavity 10. The rack 1711 meshes with the gear 122. When the lifting plate 171 slides vertically upward, it drives the reciprocating rotating shaft 12 to rotate counterclockwise. When the lifting plate 171 slides vertically downward, it drives the reciprocating rotating shaft 12 to rotate clockwise, thereby realizing the reciprocating rotation of the reciprocating rotating shaft 12. The base 1 is also rotatably connected with an intermittent rotating shaft 13. The intermittent rotating shaft 13 is hollow and sleeved outside the reciprocating rotating shaft 12. The diameter of the intermittent rotating shaft 13 is larger than that of the reciprocating rotating shaft 12. The intermittent rotating shaft 13 and the reciprocating rotating shaft 12 are coaxially arranged. An intermittent driving mechanism 3 is arranged between the inner wall of the intermittent rotating shaft 13 and the outer wall of the reciprocating rotating shaft 12. The intermittent driving mechanism 3 is a bicycle ratchet mechanism disclosed in a Chinese invention patent with the authorization announcement number CN109027049A, including an outer ring ratchet coaxially arranged. A through hole is arranged at the center of the ratchet. Internal teeth are arranged on the inner wall of the ratchet. It also includes an inner ring disc-shaped pawl coaxially arranged. A plurality of pawl balls corresponding to the internal teeth one by one are symmetrically slidably connected to the center of the pawl. Springs are connected between the pawl balls and the disc. When in use, the pawl balls are pressed against the internal teeth by the springs. Since the shapes of both sides of the internal teeth are different, the internal teeth will have different forces on the pawl balls in two rotation directions, thereby realizing one-way transmission. The specific structure will not be elaborated here; the intermittent rotating shaft 13 in the present invention is equivalent to the ratchet in the prior art, and the reciprocating rotating shaft 12 is equivalent to the disc-shaped pawl in the prior art.

[0035] As Figures 1-2 As shown in the figure, a support frame 2 is fixedly installed on one side of the base 1. A conveying rotating shaft 21 is rotatably connected to the support frame 2. A conveying roller is coaxially fixed to the outer circle of the conveying rotating shaft 21. A conveyor belt is drivingly connected to the outer circle of the conveying roller. The conveying direction of the conveyor belt is perpendicular to the base 1. A cutting machine 11 is rotatably installed on the plate at the top of the base 1 on one side of the cutting cavity 14. The cutting machine 11 is provided with double saw blades. A notch for the cutting machine 11 to rotate is provided on the plate. A feeding port for materials to enter is provided on the plate of the cutting cavity 14 close to the conveyor belt. A first driving wheel 131 is coaxially arranged on the intermittent rotating shaft 13. A first driven wheel 211 is coaxially arranged on the conveying rotating shaft 21 close to the base 1. Both the first driving wheel 131 and the first driven wheel 211 are arranged as belt wheels, and the diameter of the first driving wheel 131 is larger than that of the first driven wheel 211. The first driving wheel 131 and the first driven wheel 211 are drivingly connected by a belt.

[0036] After the material cutting is completed, the driving block 151 slides out under the drive of the cylinder 16. The driving block 151 drives the moving fixture 19 to slide away from the fixed fixture 18. At this time, the test block falls between the two and enters the blanking cavity 4 for collection. At this time, the lifting plate 171 slides downward and drives the reciprocating rotating shaft 12 to rotate clockwise. At this time, driven by the intermittent driving mechanism 3, the intermittent rotating shaft 13 rotates in the same direction as the reciprocating rotating shaft 12. The intermittent rotating shaft 13 drives the conveying rotating shaft 21 to rotate clockwise. At this time, the conveying rotating shaft 21 drives the conveyor belt to send the material into the cutting cavity 14 through the feeding port. When the driving block 151 drives the moving fixture 19 to slide towards the fixed fixture 18, the driving block 151 drives the lifting plate 171 to rise to close the cutting cavity 14. At this time, the lifting plate 171 drives the reciprocating rotating shaft 12 to rotate counterclockwise. The intermittent driving mechanism 3 will not transmit the power of the reverse rotation of the reciprocating rotating shaft 12 to the intermittent rotating shaft 13. Therefore, the intermittent rotating shaft 13 does not rotate, and the purpose of sending the material into the cutting cavity 14 to be cut by the conveyor belt only during the blanking process can be achieved.

[0037] The support frame 2 is also provided with a plurality of clamping parts 22. The clamping parts 22 include auxiliary clamps 221 symmetrically and slidably connected to both sides of the support frame 2. The auxiliary clamps 221 are used for clamping the material. Guide rods are fixedly welded to both sides of the support frame 2. The auxiliary clamps 221 are provided with guide grooves for the guide rods to pass through. The cross-sectional shape and size of the guide grooves are equal to the cross-sectional shape and size of the guide rods. The clamping parts 22 also include a bidirectional lead screw 222 rotatably connected to the support frame 2. The bidirectional lead screw 222 straddles both sides of the support frame 2. The bidirectional lead screw 222 is located at the bottom end of the support frame 2. Both sides of the bidirectional lead screw 222 are threadedly connected to the auxiliary clamps 221 located on both sides of the support frame 2. A second driving wheel 121 is coaxially arranged on the reciprocating rotating shaft 12. A second driven wheel 2221 is coaxially arranged on the bidirectional lead screw 222 near the base 1. Both the second driving wheel 121 and the second driven wheel 2221 are arranged as belt wheels. The second driving wheel 121 and the second driven wheel 2221 are connected by belt drive. The diameter of the second driving wheel 121 is larger than the diameter of the second driven wheel 2221. A plurality of bidirectional lead screws 222 located at the bottom end of the support frame 2 are all coaxially provided with belt wheels of the same size. The plurality of belt wheels are connected by a transmission belt.

[0038] The above are only the embodiments of the present invention. The well-known specific technical solutions and / or characteristics and other common knowledge are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention. These will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims. The specific implementation manners and other records in the specification can be used to explain the content of the claims.

Claims

1. Concrete specimen preparation cutting device, characterized in that: It includes a base. The base is provided with a cutting cavity for cutting materials. A cutting machine is rotatably installed on one side of the cutting cavity. The base is vertically slidably connected with a lifting plate for opening and closing the cutting cavity. It also includes a support frame. The support frame is provided with a conveyor belt for conveying materials to the cutting cavity. The base is installed with a reciprocating rotating shaft and an intermittent rotating shaft. The reciprocating rotating shaft is linked with the lifting plate. The up-and-down sliding of the lifting plate drives the reciprocating rotating shaft to rotate reciprocally. The intermittent rotating shaft is linked with the reciprocating rotating shaft. The conveyor belt is linked with the intermittent rotating shaft. The intermittent rotation of the intermittent rotating shaft is used to drive the conveyor belt to intermittently convey materials to the cutting cavity.

2. The concrete specimen preparation cutting device according to claim 1, wherein: A driving cavity is opened at the bottom end of the base. A driving block is horizontally slidably connected in the driving cavity. The base is installed with a cylinder for sliding the driving block. The driving block is inclined with a chute. The bottom end of the lifting plate is slidably connected to the chute. The base is provided with a sliding cavity for the vertical sliding of the lifting plate. The sliding cavity is communicated with the driving cavity.

3. The concrete specimen preparation cutting device according to claim 2, characterized in that: An inlet for materials to enter is opened on one side of the cutting cavity close to the conveyor belt. A blanking cavity is opened at the bottom end of the base. The bottom end of the cutting cavity is open and communicated with the blanking cavity. A fixed clamp and a movable clamp are both arranged at the bottom end of the cutting cavity. The driving block is connected to the movable clamp. The driving block is used to drive the movable clamp to slide.

4. The concrete specimen preparation cutting device according to claim 3, characterized in that: The base is provided with a linkage cavity. The linkage cavity is communicated with the sliding cavity. The reciprocating rotating shaft penetrates through the linkage cavity. A gear is coaxially arranged on the reciprocating rotating shaft. A rack is arranged on one side of the lifting plate close to the linkage cavity. The rack is meshed with the gear.

5. The concrete test block sample preparation cutting device according to claim 4, characterized in that: The intermittent rotating shaft is coaxially arranged with the reciprocating rotating shaft and sleeved outside the reciprocating rotating shaft. An intermittent driving mechanism is arranged between the inner wall of the intermittent rotating shaft and the outer wall of the reciprocating rotating shaft.

6. The concrete specimen sampling and cutting device according to claim 5, characterized in that: The support frame is rotatably provided with a conveying rotating shaft for driving the conveyor belt to rotate. A first driving wheel and a first driven wheel which are coaxially arranged and in transmission connection are respectively arranged on the intermittent rotating shaft and the conveying rotating shaft. The diameter of the first driving wheel is larger than that of the first driven wheel.

7. The concrete specimen preparation cutting device according to claim 1, characterized in that: The support frame is provided with a number of clamping parts. Each clamping part includes an auxiliary clamp slidably connected to both sides of the support frame and a bidirectional lead screw rotatably connected to the support frame. The bidirectional lead screw is threadedly connected to the auxiliary clamp.

8. The concrete specimen preparation cutting device according to claim 7, characterized in that: The lead screws of a number of clamping parts are linked. At least one of the lead screws of a number of clamping parts is linked with the reciprocating rotating shaft.

9. The concrete specimen preparation cutting device according to claim 8, wherein: At least one lead screw and the reciprocating rotating shaft are respectively coaxially provided with a second driven wheel and a second driving wheel which are in transmission connection. The diameter of the second driving wheel is larger than that of the second driven wheel.

10. The concrete specimen preparation cutting device according to claim 3, characterized in that: A guide shaft for the sliding of the movable clamp is fixed in the blanking cavity. The guide shaft can contact the upper surface of the test block.

Images