Quick locking structure of grinder adapter

Abstract

The utility model discloses a quick locking structure of a grinder adapter, which comprises a connecting rod, a locking nut and an adapter, the connecting rod axially penetrates through the adapter from the middle part, the middle part of the locking nut is provided with an axially penetrating step hole, an internal thread part a is arranged in the step hole, the lower end of the locking nut is provided with a cylinder part concentric with the step hole, and the inner thread part a is arranged in the cylinder part. An external thread part b is arranged on the outer side of the cylinder part, the upper end of the connecting rod is inserted into the stepped hole and is in threaded connection with the stepped hole, the length of the internal thread part a is larger than that of the external thread part b, an adapter cover matched with the adapter is clamped to the upper end of the adapter, a through cushion block is embedded in the middle of the adapter cover, and the cylinder part penetrates through the cushion block and is in threaded connection with the cushion block. An inner thread and an outer thread which are independent are arranged on the locking nut, the grinding connecting rod is screwed into the locking nut until the grinding connecting rod is connected and screwed with the inner thread on the adapter cover cushion block at the same time, the two thread pairs play a role in mutual locking, and the stability of adapter installation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinders, in particular to a quick locking structure of a grinder adapter. Background Art

[0002] Vibration grinders achieve fine grinding of samples through high-frequency vibration. They have the advantages of high efficiency, good uniformity, and strong gentleness. They are widely used in scientific research, pharmaceuticals, materials and other fields, and have become an indispensable sample pre-treatment tool. The principle of most grinding equipment is to drive the sample to vibrate up and down at high frequency through the rotation of the motor. During operation, it is necessary to ensure that the adapter (the adapter is used to insert the test tube containing the sample during vibration grinding) does not loosen during high-frequency vibration. The existing adapter and the connecting rod of the grinder are fixed at the upper end with a nut, and the threaded nut is prone to loosening under the repeated impact of the high-frequency vibration of the grinder. Utility Model Content

[0003] The purpose of the utility model is to provide a quick locking structure of a grinder adapter to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quick locking structure of a grinder adapter, comprising a connecting rod, a locking nut and an adapter, the connecting rod axially penetrates the adapter from the middle part, the middle part of the locking nut is provided with an axially penetrating step hole, the step hole is provided with an internal threaded portion a, the lower end of the locking nut is provided with a cylindrical portion concentric with the step hole, the outer side of the cylindrical portion is provided with an external threaded portion b, the upper end of the connecting rod is inserted into the step hole and screwed thereto, the length of the internal threaded portion a is greater than the length of the external threaded portion b, the upper end of the adapter is clamped with a matching adapter cover, the middle part of the adapter cover is embedded with a penetrating gasket, the cylindrical portion penetrates the gasket and is screwed thereto.

[0005] Preferably, the pitch of the external thread portion b is greater than the pitch of the internal thread portion a.

[0006] Preferably, a cotton buffer layer is provided on the top of the adapter and the bottom of the adapter cover.

[0007] Compared with the prior art, the utility model has the following beneficial effects: the locking nut has two independent inner and outer threads, which are screwed into the ground connecting rod until they are simultaneously connected to the inner threads on the adapter cover gasket and tightened, and the two thread pairs play a role of mutual locking, thereby improving the stability of the adapter installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0009] Figure 2This is a schematic diagram of the main structure of the utility model;

[0010] Figure 3 It is a schematic cross-sectional structure diagram of the locking nut of the utility model.

[0011] In the figure: 1. connecting rod; 2. locking nut; 3. adapter; 4. adapter cover; 5. buffer layer; 6. spacer; 7. internal thread part a; 8. external thread part b. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0013] See also Figure 1-3 The utility model provides a technical solution: a quick locking structure of a grinder adapter, comprising a connecting rod 1, a locking nut 2 and an adapter 3, wherein the connecting rod 1 axially penetrates the adapter 3 from the middle, and the middle of the locking nut 2 is provided with an axially penetrating stepped hole, and an internal threaded portion a7 is provided in the stepped hole. The lower end of the locking nut 2 is provided with a cylindrical portion concentric with the stepped hole, and an outer portion b8 is provided on the outer side of the cylindrical portion. The upper end of the connecting rod 1 is inserted into the stepped hole and threadedly connected thereto, the length of the internal threaded portion a7 is greater than the length of the external threaded portion b8, the pitch of the external threaded portion b8 is greater than the pitch of the internal threaded portion a7, and the spiral directions of the internal threaded portion a7 and the external threaded portion b8 are the same. Due to the different pitches of the two, a set of action force and reaction force will be generated at the two thread pairs respectively, thereby achieving mutual locking, which is conducive to reducing the loosening of the locking nut 2.

[0014] The upper end of the adapter 3 is clamped with a matching adapter cover 4, the middle of the adapter cover 4 is embedded with a through-cushion 6, and the cylindrical portion penetrates the through-cushion 6 and is screwed therewith. The top of the adapter 3 and the bottom of the adapter cover 4 are provided with a cotton buffer layer 5, which can make the force between the adapter cover 4 and the adapter 3 more balanced.

[0015] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick locking structure for a grinder adapter, comprising a connecting rod (1), a locking nut (2) and an adapter (3), characterized in that: The connecting rod (1) axially penetrates the adapter (3) from the middle, and the middle part of the locking nut (2) is provided with an axially penetrating step hole, and the step hole is provided with an internal threaded portion a (7). The lower end of the locking nut (2) is provided with a cylindrical portion concentric with the step hole, and the outer side of the cylindrical portion is provided with an external threaded portion b (8). The upper end of the connecting rod (1) is inserted into the step hole and screwed thereto, and the length of the internal threaded portion a (7) is greater than the length of the external threaded portion b (8). The upper end of the adapter (3) is clamped with a matching adapter cover (4), and a penetrating gasket (6) is embedded and installed in the middle part of the adapter cover (4), and the cylindrical portion penetrates the gasket (6) and is screwed thereto.

2. The quick locking structure of the grinder adapter according to claim 1, characterized in that: The pitch of the external thread portion b (8) is greater than the pitch of the internal thread portion a (7).

3. The quick locking structure of the grinder adapter according to claim 1, characterized in that: The top of the adapter (3) and the bottom surface of the adapter cover (4) are provided with a cotton buffer layer (5).

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