A torsion spring type finger clip structure

Abstract

The application discloses a torsion spring type finger clamp structure and relates to the technical field of seed planting equipment. The torsion spring type finger clamp structure comprises a finger clamp, a double torsion spring and a fixed rod. The double torsion spring comprises a first spring body and a second spring body. One end of the first spring body is connected with one end of the second spring body through a U-shaped connecting rod. The fixed rod is in abutment with the U-shaped connecting rod. The two ends of the double torsion spring are used for abutting against a finger clamp disc. The finger clamp arm can rotate relative to the double torsion spring. The double torsion spring and the finger clamp arm are coaxially installed. There is no relative movement between the double torsion spring and the finger clamp disc and between the double torsion spring and the finger clamp arm, so that no friction is generated, the service life is longer, the clamping force on the seed particles is moderate, and the adaptability to the small seed particles is stronger.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seed metering device, in particular to a torsion spring type finger clamp structure. BACKGROUND

[0002] The existing finger clamp type seed metering device usually adopts a finger clamp structure with double tension springs, that is, the finger clamp is deflected in different directions by two tension springs to complete the seed metering process. Since the finger clamp needs to be frequently rotated during the operation of the seed metering device, the end of the tension spring is connected with the tension spring lug on the finger clamp. During the rotation of the finger clamp, friction occurs between the end of the tension spring and the corresponding tension spring lug, which causes serious wear of the tension spring and the tension spring lug on the finger clamp, resulting in easy breakage of the tension spring lug and serious impact on the service life of the seed metering device.

[0003] Moreover, the finger clamp structure with double tension springs causes the finger clamp clamping force to be too large when the opening amplitude of the finger clamp is large, and the finger clamp clamping force to be too small when the opening amplitude of the finger clamp is small. The small clamping force affects the clamping of small seeds, causing the finger clamp to lose seeds and affecting the precision of sowing. The large clamping force causes overload and fatigue of the tension spring, and serious torsional force decay. SUMMARY

[0004] The purpose of the present application is to provide a torsion spring type finger clamp structure to solve the problems existing in the prior art and improve the service life of the finger clamp type seed metering device.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The present application provides a torsion spring type finger clamp structure, which comprises:

[0007] A finger clamp, which comprises a finger clamp sheet, a finger clamp arm and a finger clamp lever, the finger clamp arm is in the shape of a rod, the finger clamp sheet is fixedly arranged at one end of the finger clamp arm, the finger clamp lever is fixedly arranged at the other end of the finger clamp arm, and a fixing rod is arranged on the finger clamp arm;

[0008] A double torsion spring is sleeved on the finger clamp arm, the double torsion spring comprises a first spring body and a second spring body, one end of the first spring body is connected with one end of the second spring body through a U-shaped connecting rod, and the fixing rod abuts against the U-shaped connecting rod; the two ends of the double torsion spring are used for abutting against a finger clamp disc, and the finger clamp arm can rotate relative to the double torsion spring.

[0009] Preferably, the other end of the first spring body is provided with a first hook, the other end of the second spring body is provided with a second hook, a connecting plate is fixedly arranged on the finger clamp disc, and the first hook and the second hook are both hung on the connecting plate and abut against the connecting plate.

[0010] Preferably, a positioning ring is further fixed on the finger clamp arm, a positioning groove is arranged on the finger clamp disc, the positioning ring is partially located in the positioning groove, and the positioning groove and the positioning ring are matched to realize positioning of the finger clamp arm.

[0011] Preferably, a placing groove is arranged on the finger clamp disc and corresponds to the finger clamp arm, and the finger clamp arm is rotationally matched with the placing groove.

[0012] Preferably, a pressing ring is further detachably connected to the finger clamp disc, and the finger clamp arm is located between the placing groove and the pressing ring.

[0013] The present application has the following technical effects relative to the prior art:

[0014] In the torsional spring type finger clamp structure, the double torsional springs are coaxially installed with the finger clamp arm, and there is no relative movement between the double torsional springs and the finger clamp disc and between the double torsional springs and the finger clamp arm, so no friction is generated, the service life is longer, the clamping force on the seeds is moderate, and the adaptability to the small seeds is stronger.

[0015] Further, since the hooks of the double torsional springs abut against the finger clamp arm and the finger clamp disc, when the finger clamp arm rotates, the rotation is along the circumferential direction of the axis of the double torsional springs, which does not cause axial movement of the double torsional springs and movement of the hooks, so there is no mutual friction between the hooks of the double torsional springs and the finger clamp arm and the finger clamp disc, and the hooks of the double torsional springs are not prone to wear or breakage. In addition, the torsional force of the double torsional springs changes linearly and stably, so whether the finger clamp opening is large or small, the torsional force of the double torsional springs acting on the finger clamp is basically balanced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a torsional spring type finger clamp structure of the present application;

[0018] Figure 2 FIG. 2 is a schematic diagram of the torsional spring type finger clamp structure of the present application installed on a finger clamp disc;

[0019] Figure 3 FIG. 3 is a partial enlarged view of position A in FIG. 2; Figure 2

[0020] ​The components include: 1. Finger clip; 2. Finger clip arm; 3. Positioning ring; 4. First spring body; 5. U-shaped connecting rod; 6. Second spring body; 7. First hook; 8. Second hook; 9. Fixing rod; 10. Finger clip lever; 11. Finger clip plate; 12. Connecting plate; 13. Pressure ring. Detailed Implementation

[0021] The technical solutions of 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.

[0022] The purpose of this invention is to provide a torsion spring type finger clip structure to solve the problems existing in the prior art and improve the service life of the finger clip type seed metering device.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-3 As shown, this embodiment provides a torsion spring type finger clip structure, including:

[0025] The finger clip includes a finger clip piece 1, a finger clip arm 2, and a finger clip lever 10. The finger clip arm 2 is rod-shaped. The finger clip piece 1 is fixed at one end of the finger clip arm 2, and the finger clip lever 10 is fixed at the other end of the finger clip arm 2. A fixing rod 9 is provided on the finger clip arm 2.

[0026] A double torsion spring is fitted on the finger clamp arm 2. The double torsion spring includes a first spring body 4 and a second spring body 6. One end of the first spring body 4 is connected to one end of the second spring body 6 through a U-shaped connecting rod 5. The fixing rod 9 abuts against the U-shaped connecting rod 5. The two ends of the double torsion spring are used to abut against the finger clamp plate 11. The finger clamp arm 2 can rotate relative to the double torsion spring.

[0027] In this embodiment, a first hook 7 is provided at the other end of the first spring body 4, a second hook 8 is provided at the other end of the second spring body 6, a connecting plate 12 is fixed on the finger clamp 11, and the first hook 7 and the second hook 8 are both hung on the connecting plate 12 and abut against the connecting plate 12.

[0028] In this embodiment, a positioning ring 3 is also fixed on the finger clamp arm 2, and a positioning groove is provided on the finger clamp plate 11. The positioning ring 3 is partially located in the positioning groove, and the positioning groove and the positioning ring 3 cooperate to achieve axial positioning of the finger clamp arm 2.

[0029] In this embodiment, a placement groove is provided on the finger clamping plate 11 corresponding to the finger clamping arm 2, and the finger clamping arm 2 is rotatably engaged with the placement groove.

[0030] In the embodiment, the press ring 13 is detachably connected to the finger clamp disc 11, the finger clamp arm 2 is located between the placing groove and the press ring 13, and the press ring 13 presses the finger clamp arm 2 in the placing groove, so that the finger clamp arm 2 is not easy to be separated from the placing groove, thereby improving the stability of the working of the torsion spring type finger clamp structure.

[0031] In the embodiment, the press ring 13 is detachably connected to the finger clamp disc 11, the finger clamp arm 2 is located between the placing groove and the press ring 13, and the press ring 13 presses the finger clamp arm 2 in the placing groove, so that the finger clamp arm 2 is not easy to be separated from the placing groove, thereby improving the stability of the working of the torsion spring type finger clamp structure.

[0032] In the embodiment, the press ring 13 is detachably connected to the finger clamp disc 11, the finger clamp arm 2 is located between the placing groove and the press ring 13, and the press ring 13 presses the finger clamp arm 2 in the placing groove, so that the finger clamp arm 2 is not easy to be separated from the placing groove, thereby improving the stability of the working of the torsion spring type finger clamp structure.

[0033] In the description of the present application, it should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

Claims

1. A torsion spring type finger grip structure characterized by comprising: The utility model relates to a kind of finger clamps, including finger clamp piece, finger clamp arm and finger clamp lever, the finger clamp arm is rod-like, the finger clamp piece is fixed in one end of the finger clamp arm, the finger clamp lever is fixed in the other end of the finger clamp arm, fixed rod is provided on the finger clamp arm; Double torsion spring is sleeved on the finger clamp arm, the double torsion spring includes first spring body and second spring body, one end of the first spring body is connected with one end of the second spring body by U-shaped connecting rod, the fixed rod is abutted with the U-shaped connecting rod;Two ends of the double torsion spring are used to be abutted with finger clamp disc, the finger clamp arm can be rotated relative to the double torsion spring; The other end of the first spring body is provided with first hook, the other end of the second spring body is provided with second hook, connecting plate is fixed on the finger clamp disc, the first hook and the second hook are hung on the connecting plate and are all abutted with the connecting plate; The finger clamp disc is provided with placement slot corresponding to the finger clamp arm, the finger clamp arm is rotationally fitted with the placement slot;Pressure ring is detachably connected on the finger clamp disc, the finger clamp arm is located between the placement slot and the pressure ring. The finger clamp arm is further fixed with positioning ring, the finger clamp disc is provided with positioning slot, the positioning ring is partially located in the positioning slot, the positioning slot is matched with the positioning ring to realize the positioning of the finger clamp arm.

2. The torsion spring-type finger grip structure according to claim 1, characterized by: ​

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