Duplex straight gear

Abstract

The utility model discloses a duplex straight gear. The duplex straight gear comprises a small gear and a large gear, and a connecting structure is arranged between the small gear and the large gear; the connecting structure comprises a connecting pipe integrally formed on the small gear, the small gear is provided with an external thread and a threaded groove, the large gear is provided with a center hole and a counter bore, an internal thread is formed in the center hole, a screw rod is installed in the counter bore, and one end of the screw rod is connected with the threaded groove. According to the duplex straight gear, the connecting structure comprising the connecting pipe, the external thread, the internal thread, the thread groove, the counter bore and the screw rods is arranged between the small gear and the large gear, the small gear and the large gear are connected and fixed through the connecting pipe and the two screw rods, and the structural strength of the duplex straight gear is improved; and the gear is more stable in use.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear technical field especially relates to a duplex spur gear. BACKGROUND

[0002] Gear is the traditional transmission device, and is widely applied in each industry. Duplex gear is two gears connected into one and separated by a certain distance, and is mostly used in transmission. According to different gear teeth, duplex gear is divided into spur gear and helical gear. Spur gear is suitable for occasions of reducing speed and increasing torque, and helical gear is more suitable for occasions of higher load capacity and higher contact ratio.

[0003] The file with the existing announcement number CN220134557U discloses a duplex spur gear, which comprises a gear one; a pair of insertion slots are formed in the middle of the gear one; an insertion plate is slidably connected in the insertion slots; a connecting piece is fixedly connected to the end of the insertion plate; a gear two is fixedly connected to the end of the connecting piece away from the insertion plate; a through hole is formed in the end of the insertion plate; a bolt plate is slidably matched in the through hole; the bolt plate is arc-shaped; the through hole corresponding to the bolt plate is also arc-shaped, when the gear needs to be replaced, the gear two is separated from the gear one by taking out the insertion plate from the insertion slot, and then a new gear two with appropriate size is inserted, so that the size of the gear two is replaced, and the gear two is more suitable for the transmission structure.

[0004] However, in the use process of the duplex spur gear, the gear two and the gear one are only connected by the insertion plate, the connection strength of the two is not high, and the insertion plate is further weakened in structure strength due to the gap provided on the insertion plate. When used in high torque occasions, the insertion plate is prone to break at the gap, and the gear cannot be stably used.

[0005] Therefore, it is necessary to provide a duplex spur gear to solve the above technical problems. UTILITY MODEL CONTENT

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a duplex spur gear which can improve the structural strength and improve the stability of the gear.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The duplex spur gear comprises a pinion and a gear, and a connecting structure is arranged between the pinion and the gear; the connecting structure comprises a connecting pipe integrally formed on the pinion, an outer thread and a thread groove are formed on the pinion, a center hole and a counterbore are formed on the gear, an inner thread is formed in the center hole, a screw rod is installed in the counterbore, and one end of the screw rod is connected with the thread groove.

[0009] Preferably, the external thread and the internal thread are adapted to each other, and both are trapezoidal threads.

[0010] Preferably, an anti-skid groove is formed in the connecting pipe.

[0011] Preferably, an end face reference surface and an axial reference surface are arranged on the connecting pipe.

[0012] Preferably, a limiting hole is formed in the connecting pipe, and a pin rod is arranged in the limiting hole.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) the utility model discloses a connecting structure including connecting pipe, external thread, internal thread, thread groove, counterbore and screw rod between pinion and gear, and the pinion and the gear are connected and fixed by the connecting pipe and two screw rods, so that the structure strength of double straight gear is improved, and the gear is more stable in use.

[0015] (2) the utility model discloses that end face reference surface and axial reference surface are arranged on the connecting pipe, which can improve the gear assembly accuracy.

[0016] (3) the utility model discloses that the limiting hole and the pin rod are arranged, which can improve the safety of the gear in use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model provides a double straight gear structure schematic drawing;

[0018] Figure 2 The utility model discloses a double straight gear explosion structure schematic drawing; Figure 1

[0019] Figure 3 The utility model discloses a double straight gear pinion structure schematic drawing; Figure 1

[0020] Figure 4 The utility model discloses a double straight gear gear structure schematic drawing; Figure 1

[0021] Figure 5 The utility model discloses a double straight gear one kind embodiment structure schematic drawing. Figure 1

[0022] Wherein, the name corresponding to the sign is: 1-pinion, 2-gear, 3-connecting pipe, 4-anti-skid groove, 5-end face reference surface, 6-axial reference surface, 7-center hole, 8-external thread, 9-internal thread, 10-thread groove, 11-counterbore, 12-screw rod, 13-limiting hole, 14-pin rod. DETAILED DESCRIPTION ​​​​

[0023] The utility model is further illustrated below in combination with the drawings and examples, and the mode of the utility model includes but is not limited to the following examples.

[0024] As Figures 1-5 The duplex spur gear provided by the utility model is shown in the figure, which comprises a pinion 1 and a gear 2, and a connecting structure is arranged between the pinion 1 and the gear 2, the connecting structure comprises a connecting pipe 3 integrally formed on the pinion 1, an anti-skid groove 4 for preventing the gear from rotating axially and slipping in use is arranged on the inner wall of the connecting pipe 3, the anti-skid structure of inserting a wedge into the anti-skid groove 4 is a common structure in the gear structure, and will not be described here, a trapezoidal external thread 8 and a thread groove 10 are arranged on the pinion 1, an internal thread 9 matched with the external thread 8 is arranged in the central hole 7 of the gear 2, a counterbore 11 is arranged on the gear 2, a screw rod 12 is installed in the counterbore 11, one end of the screw rod 12 is screwed into the thread groove 10, in use, the connecting pipe 3 is screwed into the central hole 7 of the gear 2 and is screwed tightly with a certain force until the counterbore 11 is aligned with the thread groove 10 and stops, then the screw rod 12 is inserted into the counterbore 11 and screwed into the thread groove 10 and is screwed tightly, thereby stably connecting the pinion 1 and the gear 2 together, the pinion 1 and the gear 2 are connected by using the connecting pipe 3 and the two screw rods 12, the connecting strength between the pinion 1 and the gear 2 is improved, thereby improving the structural strength of the entire duplex spur gear, and there is no gap on the circumference of the connecting pipe 3, so that the strength of the connecting pipe 3 will not be reduced, compared with the structure design in CN220134557U, the structural strength of the gear is further improved, and the stability of the duplex spur gear in use is further improved, and it is worth noting that after the screw rod 12 is removed, the gear 2 can be conveniently rotated off the pinion 1 by using a tool, and the disassembly is also convenient. The gear mounting shaft is inserted into the connecting pipe 3 and is fixed, and the duplex spur gear can be installed and used.

[0025] By arranging the connecting structure comprising the connecting pipe 3, the external thread 8, the internal thread 9, the thread groove 10, the counterbore 11 and the screw rod 12 between the pinion 1 and the gear 2, the pinion 1 and the gear 2 are connected and fixed by using the connecting pipe 3 and the two screw rods 12, the structural strength of the duplex spur gear is improved, and the gear is more stable in use.

[0026] Example 2:

[0027] As Figures 3-4As shown, in order to improve the assembly accuracy, the end face reference surface 5 and the axial reference surface 6 are arranged on the connecting pipe 3, and the axial reference surface 6 is used in cooperation with the center hole 7, and the axial reference surface 6 is attached to the inner wall of the center hole 7, so as to ensure the coaxiality of the gear 1 and the gear 2 during assembly. During assembly, the end face reference surface 5 is attached to the side wall of the gear 2, so that the parallelism of the end face of the gear 1 and the gear 2 during assembly is ensured, and the gear 2 and the gear 1 are separated by a certain distance (the thickness value of the end face reference surface 5).

[0028] By arranging the end face reference surface 5 and the axial reference surface 6 on the connecting pipe 3, the gear assembly accuracy can be improved.

[0029] Embodiment 3:

[0030] As shown in Figure 3 and Figure 5 A limiting hole 13 is radially arranged on the connecting pipe 3, and a pin 14 is arranged in the limiting hole 13. Once the screw rod 12 is broken during use, the gear 2 and the gear 1 rotate towards each other, that is, the loosening phenomenon occurs. The gear 2 cannot immediately fall off the gear 1 by relying on the pin 14, and the device can still operate for a period of time, thereby preventing the gear 2 from falling off in a short time and causing more serious accidents.

[0031] By arranging the limiting hole 13 and the pin 14, the safety of the gear during use can be improved.

[0032] Working principle: during use, the connecting pipe 3 is screwed into the center hole of the gear 2 and is tightly screwed with a certain force until the counterbore 11 is aligned with the threaded groove 10, then the screw rod 12 is inserted into the counterbore 11 and screwed into the threaded groove 10 and is tightly screwed, thereby stably connecting the gear 1 and the gear 2 together. The connecting pipe 3 and the two screw rods 12 are used to connect the gear 1 and the gear 2, which improves the connection strength between the gear 1 and the gear 2, and there is no gap on the circumference of the connecting pipe 3, so that the strength of the connecting pipe 3 will not be reduced. Compared with the structure design in CN220134557U, the structural strength of the present scheme is further improved, and the stability of the double straight gear during use is further improved.

Claims

1. A double straight spur gear, characterized by, The utility model relates to a kind of pinion (1) and gear (2), connecting structure is arranged between the pinion (1) and the gear (2); The connecting structure includes the connecting pipe (3) integrally formed on the pinion (1), the pinion (1) is provided with external thread (8) and thread groove (10), the gear (2) is provided with center hole (7) and counterbore (11), the center hole (7) is provided with internal thread (9) in, the counterbore (11) is installed screw rod (12), the screw rod (12) one end is connected with the thread groove (10). The external thread (8) is matched with the internal thread (9).

2. A double spur gear according to claim 1, characterized in that The external thread (8) and the internal thread (9) are trapezoidal thread.

3. A double spur gear according to claim 1, characterized in that Anti-skid groove (4) is arranged in the connecting pipe (3).

4. A double spur gear according to claim 1, characterized in that End face reference surface (5) and axial reference surface (6) are arranged on the connecting pipe (3).

5. A double spur gear as claimed in claim 1, wherein, Limiting hole (13) is arranged on the connecting pipe (3), and pin rod (14) is installed in the limiting hole (13).

6. A double spur gear as claimed in claim 1, wherein ​

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