Tension detection machine for composite fiber packing belt

Abstract

The utility model discloses a tension detector for a composite fiber packing belt, which is characterized in that upright posts are arranged on two sides of the upper surface of a base, the top ends of the upright posts are connected with a top frame, guide rods are arranged in grooves on the inner sides of the upright posts, a fixed seat is arranged in the middle of the upper surface of the base, and a tension sensor is arranged on the upper surface of the fixed seat; the lifting plate is movably arranged between the base and the top frame, the number of the pull heads is two, and the pull heads are respectively connected with the tension sensor and the connecting seat. The lifting plate is reasonable in structure, the servo motor is matched with the bidirectional output shaft speed reducer to drive the driving rods on the two sides to rotate, and the driving rods are matched with the driven chain wheels through the driving chain wheels and the chains; compared with a traditional mode that a lifting plate is controlled to ascend and descend through an air cylinder or an oil cylinder, the driving structure is higher in precision, a gap is reserved between the pull rod of the pull head and one side of the U-shaped frame, the pull rod is further matched with the smooth part of the supporting screw rod, and compared with a traditional mode that a composite fiber packing belt firstly penetrates through the pull rod and then is knotted, convenience is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of tensile testing equipment, specifically a tensile testing machine for composite fiber packing straps. Background Technology

[0002] Composite fiber strapping is a new type of environmentally friendly packaging material used to replace steel strapping and PET plastic steel strapping. With the successful development of new materials and the significant reduction in cost in recent years, it has been widely used in the steel industry, chemical fiber industry, aluminum ingot industry, paper industry, brick kiln industry, screw industry, tobacco industry, electronics industry, textile industry, machinery industry and wood industry, etc.

[0003] After the composite fiber strapping is produced, it is generally necessary to sample it and test its tensile strength using a tensile testing machine. Existing composite fiber strapping tensile testing machines are generally driven by cylinders or hydraulic cylinders, resulting in low operational accuracy and difficulty in controlling the tensile strength threshold. They also require the assistance of air pumps or hydraulic pumps. Furthermore, current knot-type testing heads typically have a pull rod mounted inside a U-shaped frame, with both ends of the pull rod connected to the sides of the U-shaped frame. During use, the composite fiber strapping needs to be passed through the pull rod before knotting, which is inconvenient. Moreover, disassembly requires either cutting the strapping or removing the knot before testing a single sample, affecting testing efficiency. Therefore, an improved technology is urgently needed to solve this problem in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a composite fiber strapping tensile strength testing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a composite fiber strapping tensile strength testing machine, comprising a frame, a lifting mechanism, and a pull head;

[0006] The frame includes a base, columns and a top frame. Columns are provided on both sides of the upper surface of the base. The top of the columns is connected to the top frame. A groove is opened on the inner side of the column. A guide rod is provided in the groove of the column. The guide rod is connected to the base and the columns respectively. A fixed seat is provided in the middle of the upper surface of the base. A tension sensor is provided on the upper surface of the fixed seat.

[0007] The lifting mechanism includes a servo motor, a bidirectional output shaft reducer, a drive rod, a chain, a driven rod, and a lifting plate. The bidirectional output shaft reducer is housed within the base. A servo motor is mounted at the input end of the bidirectional output shaft reducer and connected to the output shaft of the servo motor. The output shafts of the bidirectional output shaft reducer are located on the same axis and face both sides. The output shafts of the bidirectional output shaft reducer are connected to the drive rod via couplings. The drive rod is equipped with a drive sprocket. The driven rod is mounted within the top frame. Driven sprockets are mounted at both ends of the driven rod. Each driven sprocket corresponds to a drive sprocket and is connected via a chain. The lifting plate is movably mounted between the base and the top frame. Both ends of the lifting plate slide against a guide rod via guide sleeves. Both ends of the lifting plate are also connected to a chain on the corresponding side. A connecting seat is provided on the lower surface of the lifting plate.

[0008] The pull head has two parts, each connected to a tension sensor and a connecting base. Each pull head includes a U-shaped frame, a pull rod, and a support screw. The pull rod is located on the left side inside the U-shaped frame. A positioning groove is provided at the right end of the pull rod. A gap is left between the right end of the pull rod and the inner wall of the right side of the U-shaped frame. A through hole is provided on the right side of the U-shaped frame, and an internally threaded sleeve is provided at the through hole. The support screw passes through the internally threaded sleeve and is threadedly engaged with the internally threaded sleeve. The inner end of the support screw has a smooth surface and is inserted into the positioning groove at the right end of the pull rod.

[0009] Preferably, in the composite fiber strapping tensile testing machine provided by this utility model, a limit protrusion is provided on the outer edge of the right end of the pull rod.

[0010] Preferably, in the composite fiber strapping tensile testing machine provided by this utility model, the two ends of the base are symmetrically provided with first bearing seats, and the outer end of the active rod is rotatably connected to the corresponding first bearing seat.

[0011] Preferably, in the composite fiber strapping tensile testing machine provided by this utility model, the top frame has two symmetrically arranged second bearings at both ends, and the driven rod is rotatably connected to the second bearings at both ends.

[0012] Preferably, in the composite fiber strapping tensile testing machine provided by this utility model, the top frame is further provided with several supports, and the driven rod is rotatably engaged with the supports.

[0013] Preferably, in the composite fiber strapping tensile testing machine provided by this utility model, a knob is provided at the outer end of the support screw.

[0014] Preferably, in the composite fiber strapping tensile testing machine provided by this utility model, the end of the support screw located on the smooth part is chamfered.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) By cooperating with a servo motor and a bidirectional output shaft reducer, the active rods on both sides are driven to rotate. The active rods cooperate with the driven sprockets through the active sprockets and chains. The driven sprockets are connected to the driven rods. The driven rods are set inside the top frame. This drive structure is more accurate than the traditional method of controlling the lifting plate with a pneumatic cylinder or hydraulic cylinder, and no other equipment is required.

[0017] (2) There is a gap between the pull rod of the pull head and one side of the U-shaped frame. The pull rod also cooperates with the smooth part of the support screw. First, by opening the support screw, the composite fiber packing strap after knotting and closing can be directly sleeved. Compared with the traditional method of passing the composite fiber packing strap through the pull rod and then knotting, the convenience is greatly improved and the operation difficulty is greatly reduced. Second, when conducting tensile tests, the smooth part of the support screw is inserted into the positioning groove of the pull rod, thereby ensuring the support of the pull rod. At the same time, a limit protrusion is set on the outer periphery of the right end of the pull rod to prevent the composite fiber packing strap from sliding to the support screw. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the slider structure;

[0020] Figure 3 This is a schematic diagram showing the state of the pull head and the composite fiber packing strap during the operation of this utility model.

[0021] In the diagram: 1. Base; 2. Column; 3. Top frame; 4. Guide rod; 5. Fixing seat; 6. Tension sensor; 7. Servo motor; 8. Bidirectional output shaft reducer; 9. Drive rod; 10. Chain; 11. Driven rod; 12. Lifting plate; 13. Driven sprocket; 14. Driven sprocket; 15. Guide sleeve; 16. Connecting seat; 17. Pull head; 18. First shaft seat; 19. Second shaft seat; 20. Support; 1701. U-shaped frame; 1702. Pull rod; 1703. Support screw; 1704. Internal threaded sleeve; 1705. Positioning groove; 1706. Limiting protrusion; 1707. Knob. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Please see Figure 1-3 This utility model provides a technical solution: a composite fiber strapping tensile strength testing machine, including a frame, a lifting mechanism and a pull head 17;

[0025] The frame includes a base 1, columns 2 and a top frame 3. Columns 2 are provided on both sides of the upper surface of the base 1. The top of the columns 2 is connected to the top frame 3. A groove is opened on the inner side of the columns 2. A guide rod 4 is provided in the groove of the columns 2. The guide rod 4 is connected to the base 1 and the columns 2 respectively. A fixed seat 5 is provided in the middle of the upper surface of the base 1. A tension sensor 6 is provided on the upper surface of the fixed seat 5.

[0026] The lifting mechanism includes a servo motor 7, a bidirectional output shaft reducer 8, a drive rod 9, a chain 10, a driven rod 11, and a lifting plate 12. The bidirectional output shaft reducer 8 is housed within the base 1. The input end of the bidirectional output shaft reducer 8 is connected to the output shaft of the servo motor 7. The output shafts of the bidirectional output shaft reducer 8 are located on the same axis and face both sides. The output shafts of the bidirectional output shaft reducer 8 are connected to the drive rod 9 via couplings. The drive rod 9 is equipped with a drive sprocket 13. First bearing seats 18 are symmetrically arranged at both ends inside the base 1. The outer end of the drive rod 9 is rotatably connected to the corresponding first bearing seat 18. Through the cooperation of the first bearing seat 18 and the drive rod 9, the outer end of the drive rod 9 is supported. The driven rod 11 is mounted within the top frame 3. The inner end is symmetrically provided with second bearing seats 19 at both ends. The two ends of the driven rod 11 are rotatably connected to the second bearing seats 19 respectively. Through the cooperation between the second bearing seats 19 and the driven rod 11, the outer end of the driven rod 11 is supported. The top frame 3 is also provided with several supports 20. The driven rod 11 is rotatably cooperated with the supports 20 to further ensure the support and stability of the driven rod 11. The two ends of the driven rod 11 are provided with driven sprockets 14. The driven sprockets 14 correspond one-to-one with the driving sprockets 13 and are respectively connected by chains 10. The lifting plate 12 is movably provided between the base 1 and the top frame 3. The two ends of the lifting plate 12 are slidably cooperated with the guide rod 4 through the guide sleeves 15. The two ends of the lifting plate 12 are also respectively connected to the chain 10 on the corresponding side. The lower surface of the lifting plate 12 is provided with a connecting seat 16.

[0027] There are two pull heads 17, which are respectively connected to the tension sensor 6 and the connecting seat 16. The pull head 17 includes a U-shaped frame 1701, a pull rod 1702, and a support screw 1703. The pull rod 1702 is provided on the left side inside the U-shaped frame 1701. A positioning groove 1705 is opened at the right end of the pull rod 1702. A gap is left between the right end of the pull rod 1702 and the inner wall of the right side of the U-shaped frame 1701. A through hole is opened on the right side of the U-shaped frame 1701, and an internally threaded sleeve 1704 is provided at the through hole. The support screw 1703 passes through the internally threaded sleeve 1704 and is connected to the internally threaded sleeve 1704. The screw rod 1703 has a threaded fit, and its inner end is smooth and inserts into the positioning groove 1705 on the right end of the pull rod 1702. The smooth part of the screw rod 1703 is chamfered to ensure that the smooth part of the screw rod 1703 can be smoothly inserted into the positioning groove 1705 of the pull rod 1702. The outer edge of the right end of the pull rod 1702 is provided with a limit protrusion 1706 to prevent the composite fiber packing strap from sliding and detaching from the pull rod 1702 during tensile testing. The outer end of the screw rod 1703 is provided with a knob 1707 to facilitate the rotation of the screw rod 1703.

[0028] Working method and operating principle: Connect both ends of the composite fiber packing strap to the pull head 17 respectively, connect the two ends of the composite fiber packing strap together and tie them into a closed loop. Start the servo motor 7, which drives the output shaft of the bidirectional output shaft reducer 8 to rotate, thereby driving the drive rod 9 to rotate. The drive rod 9 drives the chain 10 to rotate through the drive sprocket 13, thereby driving the lifting plate 12 to descend along the guide rod 4. Rotate knob 1707 to move support screw 1703 outward, causing the inner end of support screw 1703 to disengage from positioning groove 1705 of pull rod 1702. Then, slip both ends of the closed-loop composite fiber strapping onto pull rod 1702 through the gap between pull rod 1702 and the inner wall of U-shaped frame 1701. Next, rotate support screw 1703 and re-insert the smooth part at the end of support screw 1703 into positioning groove 1705 of pull rod 1702. Through the cooperation of servo motor 7 and bidirectional output shaft reducer 8, the output shaft of bidirectional output shaft reducer 8 is reversed, thereby driving lifting plate 12 to rise through the cooperation of drive sprocket 13, driven sprocket 14 and chain 10. After tightening the composite fiber strapping, the maximum tension or predetermined tension of composite fiber strapping is monitored by tension sensor 6. This utility model has a reasonable structure. Through the cooperation of a servo motor 7 and a bidirectional output shaft reducer 8, the driving rods 9 on both sides rotate. The driving rods 9 cooperate with the driven sprocket 14 via a driving sprocket 13 and a chain 10. The driven sprocket 14 is connected to the driven rod 11, which is housed within the top frame 3. This drive structure offers higher precision than traditional methods of controlling the lifting plate 12 with pneumatic or hydraulic cylinders, and requires no additional equipment. Furthermore, a gap is left between the pull rod 1702 of the pull head 17 and one side of the U-shaped frame 1701, and the pull rod 1702 also connects to the support screw 1703. The smooth part of the strapping has two main advantages: First, opening the support screw 1703 allows the knotted composite fiber strapping to be directly attached, which is much more convenient and easier than the traditional method of first threading the composite fiber strapping through the pull rod 1702 and then knotting it. Second, during tensile testing, the smooth part of the support screw 1703 is inserted into the positioning groove 1705 of the pull rod 1702, thus ensuring the support of the pull rod 1702. At the same time, a limit protrusion 1706 is provided on the outer periphery of the right end of the pull rod 1702 to prevent the composite fiber strapping from sliding to the support screw 1703.

[0029] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0030] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tensile strength testing machine for composite fiber strapping, characterized in that: Includes frame, lifting mechanism and pull head (17); The frame includes a base (1), columns (2) and a top frame (3). Columns (2) are provided on both sides of the upper surface of the base (1). The top of the columns (2) is connected to the top frame (3). A groove is opened on the inner side of the columns (2). A guide rod (4) is provided in the groove of the columns (2). The guide rod (4) is connected to the base (1) and the columns (2) respectively. A fixed seat (5) is provided in the middle of the upper surface of the base (1). A tension sensor (6) is provided on the upper surface of the fixed seat (5). The lifting mechanism includes a servo motor (7), a bidirectional output shaft reducer (8), a drive rod (9), a chain (10), a driven rod (11), and a lifting plate (12). The bidirectional output shaft reducer (8) is located inside the base (1). The input end of the bidirectional output shaft reducer (8) is equipped with the servo motor (7) and connected to the output shaft of the servo motor (7). The output shafts of the bidirectional output shaft reducer (8) are located on the same axis and face both sides. The output shafts of the bidirectional output shaft reducer (8) are respectively connected to the drive rod (9) through couplings. The drive rod (9) is equipped with a main... The driven sprocket (13) is mounted on the top frame (3). The driven rod (11) is provided with driven sprockets (14) at both ends of the driven rod (11). The driven sprockets (14) correspond one-to-one with the driving sprocket (13) and are connected by chains (10). The lifting plate (12) is movably disposed between the base (1) and the top frame (3). The two ends of the lifting plate (12) are slidably engaged with the guide rod (4) through guide sleeves (15). The two ends of the lifting plate (12) are also connected to the chains (10) on the corresponding side. The lower surface of the lifting plate (12) is provided with a connecting seat (16). There are two pull heads (17), which are respectively connected to the tension sensor (6) and the connecting seat (16). The pull head (17) includes a U-shaped frame (1701), a pull rod (1702) and a support screw (1703). The pull rod (1702) is provided on the left side inside the U-shaped frame (1701). The right end of the pull rod (1702) is provided with a positioning groove (1705). There is a gap between the right end of the pull rod (1702) and the right inner wall of the U-shaped frame (1701). The right side of the U-shaped frame (1701) is provided with a through hole and an internal threaded sleeve (1704) is provided at the through hole. The support screw (1703) passes through the internal threaded sleeve (1704) and is threadedly engaged with the internal threaded sleeve (1704). The inner end of the support screw (1703) is a smooth surface and is inserted into the positioning groove (1705) on the right end of the pull rod (1702).

2. The composite fiber strapping tensile strength testing machine according to claim 1, characterized in that: A limit protrusion (1706) is provided on the outer edge of the right end of the pull rod (1702).

3. The composite fiber strapping tensile strength testing machine according to claim 1, characterized in that: The base (1) has two symmetrical first bearing seats (18) inside, and the outer end of the active rod (9) is rotatably connected to the corresponding first bearing seat (18).

4. The composite fiber strapping tensile strength testing machine according to claim 1, characterized in that: The top frame (3) has two symmetrically arranged second bearing seats (19) inside, and the two ends of the driven rod (11) are rotatably connected to the second bearing seats (19).

5. The composite fiber strapping tensile strength testing machine according to claim 1, characterized in that: The top frame (3) is also provided with several supports (20), and the driven rod (11) is rotatably engaged with the supports (20).

6. The composite fiber strapping tensile strength testing machine according to claim 1, characterized in that: A knob (1707) is provided at the outer end of the support screw (1703).

7. The composite fiber strapping tensile strength testing machine according to claim 1, characterized in that: The support screw (1703) has a chamfer at the end of the smooth part.

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