New mechanical rotating pressure arm structure

Abstract

The utility model relates to the technical field of rotary pressure arms, and discloses a novel mechanical rotary pressure arm structure, including a screw seat, a rotating shaft base installed on the screw seat, a rotating shaft rotatably installed at the bottom of the rotating shaft base, and a sleeve sleeved on the outside of the rotating shaft, wherein the sleeve is fixedly connected to the bottom of the rotating shaft base, the height of the rotating shaft and the sleeve are both 120mm, and the radial clearance tolerance of the rotating shaft and the sleeve is between 0.1mm-0.2mm. The utility model increases the height of the rotating shaft and the sleeve to 120mm, and optimizes the tolerance of the rotating shaft and the sleeve, and corrects the radial clearance tolerance of the rotating shaft and the sleeve to between 0.1mm-0.2mm, so that the rotating shaft and the sleeve matching part of the structure can guide the external force transmitted by the screw seat through the rotating shaft matching part to the axial force of the rotating shaft during specific use, thereby ensuring the service life of the rotary pressure arm structure and ensuring the reliability of the structure under normal operating conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary pressure arms, in particular to a novel mechanical rotary pressure arm structure. Background Art

[0002] Non-standard tooling equipment is widely used in the manufacturing process of various mechanical products. The practicality and reliability of non-standard tooling equipment play a vital role in the normal production and quality assurance of mechanical products.

[0003] The existing mechanical rotating pressure arm structure adopts a rotating shaft upper body and a rotating shaft base to achieve rotation through cooperation. However, the existing scheme has a large matching tolerance of the rotating shaft of the rotating shaft upper body and the sleeve of the rotating shaft base, and there is a situation that the sleeve and the rotating shaft are short. As a result, during the actual use of the structure, the matching part of the rotating shaft and the sleeve does not guide the external force transmitted by the screw seat through the matching part of the rotating shaft to the axial force of the rotating shaft, but converts the force into the holding force between the sleeve and the rotating shaft, causing the structure to deform and thus affecting the use. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a novel mechanical rotating pressure arm structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A new mechanical rotating pressure arm structure includes a screw seat, a rotating shaft base installed on the screw seat, a rotating shaft rotatably installed at the bottom of the rotating shaft base, and a sleeve sleeved on the outside of the rotating shaft. The sleeve is fixedly connected to the bottom of the rotating shaft base. The heights of the rotating shaft and the sleeve are both 120mm, and the radial clearance tolerance of the rotating shaft and the sleeve is between 0.1mm and 0.2mm.

[0007] Preferably, a top screw hole is provided on the outer side of the sleeve, and a positioning top screw is screwed onto the top screw hole. A top screw groove is provided on the outer side of the rotating shaft, and the position of the top screw groove corresponds to the position of the positioning top screw.

[0008] Preferably, the top screw groove is in a circular ring shape and surrounds the outer side of the rotating shaft.

[0009] Preferably, a top screw seat is installed at the outer end of the positioning top screw, and the side section of the top screw seat is in an equipolygonal shape.

[0010] Preferably, the radial clearance tolerance between the rotating shaft and the sleeve is 0.1 mm.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model increases the height of the rotating shaft and the shaft sleeve to 120mm, optimizes the tolerance matching of the rotating shaft and the shaft sleeve, and corrects the radial clearance tolerance matching of the rotating shaft and the shaft sleeve to between 0.1mm and 0.2mm, so that during the specific use of the structure, the matching part of the rotating shaft and the shaft sleeve can guide the external force transmitted by the screw seat through the matching part of the rotating shaft to the axial force of the rotating shaft, thereby ensuring the service life of the rotating pressure arm structure and the reliability of the structure under normal operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of the novel mechanical rotating pressure arm structure proposed by the utility model.

[0014] In the figure: 1. screw seat; 2. rotating shaft; 3. rotating shaft base; 4. shaft sleeve; 5. top screw hole; 6. positioning top screw; 7. top screw groove; 8. top screw seat. DETAILED DESCRIPTION

[0015] 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.

[0016] Reference Figure 1 , a new type of mechanical rotary pressure arm structure, including a screw seat 1, a shaft base 3 installed on the screw seat 1, a shaft 2 rotatably installed at the bottom of the shaft base 3 and a sleeve 4 sleeved on the outside of the shaft 2, the sleeve 4 is fixedly connected to the bottom of the shaft base 3, the height of the shaft 2 and the sleeve 4 are both 120mm, the radial clearance tolerance of the shaft 2 and the sleeve 4 is matched between 0.1mm-0.2mm, and the clearance tolerance is matched between 0.1mm-0.2mm, one is to facilitate the operation of the structure, and the other is that the clearance is too large and the contact surface is small, which is easy to cause stress concentration, and long-term use will cause local structural damage, causing the shaft and the sleeve to be stuck and unable to work. Due to stress concentration, the shaft surface may be damaged, and the shaft is easy to break after long-term use. Therefore, the clearance tolerance design and length design can transmit the external force received by the structure along the axial direction of the shaft. After the structure is subjected to force, the contact surface of the shaft and the sleeve is larger than that of the large clearance, so as to avoid the large clearance matching causing the sleeve to receive radial force under the action of external force to damage the structure and extend the fatigue life of the structure.

[0017] When the device is in use, the screw connected to the screw seat 1 is subjected to external force, and the height of the rotating shaft 2 and the shaft sleeve 4 is increased to 120mm (the height of the rotating shaft 2 and the shaft sleeve 4 is 60mm in the prior art), and the tolerance matching of the rotating shaft 2 and the shaft sleeve 4 is optimized, and the radial clearance tolerance matching of the rotating shaft 2 and the shaft sleeve 4 is corrected to between 0.1mm-0.2mm (the radial clearance tolerance of the tolerance rotating shaft 2 and the shaft sleeve 4 in the prior art is between 10mm-20mm), so that during the specific use of the structure, the matching part of the rotating shaft 2 and the shaft sleeve 4 can guide the external force transmitted by the screw seat 1 through the matching part of the rotating shaft 2 to axial force on the rotating shaft 2, thereby ensuring the service life of the rotating pressure arm structure and ensuring the reliability of the structure under normal operating conditions.

[0018] In this embodiment, a top screw hole 5 is provided on the outer side of the sleeve 4, and a positioning top screw 6 is screwed on the top screw hole 5. A top screw groove 7 is provided on the outer side of the rotating shaft 2. The top screw groove 7 is in a circular ring shape and surrounds the outer side of the rotating shaft 2. The position of the top screw groove 7 corresponds to the position of the positioning top screw 6, and the two are horizontal. After the top screw is screwed into the top screw hole 5, the rotating shaft 2 can be locked by the top screw groove 7, so that the force transmission method is optimized when the structure is subjected to external force.

[0019] In this embodiment, a top screw seat 8 is installed at the outer end of the positioning top screw 6. The side section of the top screw seat 8 is an equipolygonal shape, such as a regular hexagon, which is convenient for the user to manually rotate the top screw seat 8 to control the rotation of the top screw.

[0020] In this embodiment, the radial clearance tolerance between the rotating shaft 2 and the sleeve 4 is 0.1 mm.

[0021] Example 2

[0022] The difference between this embodiment and embodiment 1 is that:

[0023] In this embodiment, the radial clearance tolerance between the rotating shaft 2 and the sleeve 4 is 0.2 mm. Only the size design is different, and the effect is consistent with that of embodiment 1.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel mechanical rotating pressure arm structure, comprising a screw seat, a rotating shaft base mounted on the screw seat, a rotating shaft rotatably mounted at the bottom of the rotating shaft base, and a shaft sleeve sleeved on the outer side of the rotating shaft, wherein the shaft sleeve is fixedly connected to the bottom of the rotating shaft base, and is characterized in that: The heights of the rotating shaft and the shaft sleeve are both 120 mm, and the radial clearance tolerance of the rotating shaft and the shaft sleeve is between 0.1 mm and 0.2 mm.

2. The novel mechanical rotating pressure arm structure according to claim 1 is characterized in that: A top screw hole is formed on the outer side of the shaft sleeve, and a positioning top screw is screwed on the top screw hole. A top screw groove is formed on the outer side of the rotating shaft, and the position of the top screw groove corresponds to the position of the positioning top screw.

3. The novel mechanical rotating pressure arm structure according to claim 2 is characterized in that: The top screw groove is in a circular ring shape and surrounds the outer side of the rotating shaft.

4. The novel mechanical rotating pressure arm structure according to claim 2 is characterized in that: A top screw seat is installed at the outer end of the positioning top screw, and the side section of the top screw seat is in an equipolygonal shape.

5. The novel mechanical rotating pressure arm structure according to claim 1 is characterized in that: The radial clearance tolerance between the rotating shaft and the sleeve is 0.1 mm.

6. The novel mechanical rotating pressure arm structure according to claim 1 is characterized in that: The radial clearance tolerance between the rotating shaft and the sleeve is 0.2 mm.

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