A low-cost, high-insulation-performance crank arm device based on a composite structure
By employing a dual-dielectric insulation structure of PEEK substrate and AB adhesive layer and a ceramic heat dissipation layer in the crank arm device, the problem of insulation material failure in traditional crank arm heads under high temperature and high humidity environments is solved, achieving low cost, high insulation performance and stable signal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEINLANZ TIANJIN IND TECH CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional crank heads undergo irreversible molecular chain cross-linking reactions in their insulation materials under high temperature or high humidity environments, affecting the stability of encoder signal transmission and resulting in high costs.
The PEEK substrate and AB adhesive layer form a dual-dielectric insulation structure, combined with a 5mm electrical clearance design. The insulation performance is enhanced by a ceramic heat dissipation layer, and the auxiliary connecting rod forms a three-dimensional support network. Tin-plated metal threaded rods are used in a non-contact layout to ensure that the electrical clearance is not less than 5mm.
Maintain stable insulation performance in high-temperature environments, reduce costs, improve bending strength, prevent high-voltage breakdown, and enhance the hardness and signal transmission stability of hexagonal insulating rods.
Smart Images
Figure CN224457768U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crank arm technology, specifically a low-cost crank arm device with high insulation performance based on a composite structure. Background Technology
[0002] Traditional designs use thermosetting insulating materials to make the crank arm head, with the insulation layer directly exposed to the stress concentration area at the equipment connection. Under high temperature (>80℃) or high humidity (relative humidity >85%) environments, the material undergoes irreversible molecular chain cross-linking reactions, which seriously affects the stability of encoder signal transmission. In view of this, in-depth research was conducted to address the above problems, leading to this case. Utility Model Content
[0003] To achieve the above objectives, this utility model provides a low-cost, high-insulation-performance crank arm device based on a composite structure, comprising an insulating connecting block. The insulating connecting block includes a hexagonal insulating rod with a pair of threaded holes. A metal threaded rod is provided inside each pair of threaded holes. A metal crank arm head is provided on each pair of metal threaded rods. The hexagonal insulating rod has six pairs of insertion slots, arranged on both sides of the hexagonal insulating rod. A heat dissipation reinforcement block is provided inside each pair of insertion slots, and a pair of hexagonal insertion blocks is provided on each pair of heat dissipation reinforcement blocks.
[0004] Preferably, the hexagonal insulating rod is provided with multiple auxiliary connecting slots, and auxiliary connecting rods are respectively provided on the inner side of the multiple auxiliary connecting slots, with four pairs of auxiliary connecting rods located between the four pairs of heat dissipation reinforcement blocks.
[0005] Preferably, a pair of nuts are provided on each of the pair of metal threaded rods.
[0006] Preferably, the inner side of the pair of threaded holes is provided with AB glue.
[0007] Preferably, the hexagonal insulating rod is made of polyetheretherketone (PEEK).
[0008] Preferably, the outer sides of the four pairs of auxiliary connecting rods and the four pairs of heat dissipation reinforcement blocks are tin-plated.
[0009] Beneficial effects
[0010] This invention provides a low-cost, high-insulation-performance crank arm device based on a composite structure. It offers the following advantages: This low-cost, high-insulation-performance crank arm device uses a PEEK matrix and an AB adhesive layer to form a dual-dielectric insulation structure. Combined with a 5mm electrical clearance design, it prevents high-voltage breakdown. The PEEK material has a heat distortion temperature of 343℃, and with the ceramic heat dissipation layer, it maintains stable insulation performance even at 120℃. An auxiliary connecting rod forms a three-dimensional support network between adjacent heat dissipation and reinforcement blocks. Simultaneously, the honeycomb reinforcement structure increases the bending strength to 280MPa, thereby enhancing the rigidity of the hexagonal insulating rod. Attached Figure Description
[0011] Figure 1 This is a three-dimensional splicing diagram of a low-cost, high-insulation-performance crank arm device based on a composite structure as described in this utility model.
[0012] Figure 2 This is a front view splicing diagram of a low-cost, high-insulation-performance crank arm device based on a composite structure according to the present invention.
[0013] Figure 3 This is a side cross-sectional view of a low-cost, high-insulation-performance crank arm device based on a composite structure as described in this utility model.
[0014] In the diagram: 1. Hexagonal insulating rod; 2. Threaded hole; 3. Metal threaded rod; 4. Metal crank head; 5. Insertion slot; 6. Heat dissipation reinforcement block; 7. Hexagonal insertion block; 8. Auxiliary connection slot; 9. Auxiliary connection rod; 10. Nut. Detailed Implementation
[0015] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0016] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.
[0017] Example
[0018] Please see Figure 1-3The existing insulated crank arm consists of a metal crank arm head 4 at one end, an insulated crank arm head at the other end, and a metal threaded rod 3 in the middle. The two crank arm heads are fixed with nuts 10. The disadvantage of the existing technology is that the insulation part is located at the connection point with the equipment. The insulated crank arm head will solidify in high temperature or harsh environment, affecting the normal operation of the encoder. In addition, it is expensive.
[0019] Therefore, this application protects a low-cost, high-insulation-performance crank arm device based on a composite structure. Three pairs of heat dissipation reinforcing blocks 6 on the hexagonal insert block 7 are movably inserted into the inner side of the insert groove 5 on the hexagonal insulating rod 1. Two metal threaded rods 3 are coated with AB glue and screwed into the inner side of the threaded holes 2 on both sides of the hexagonal insulating rod 1, ensuring that the two metal threaded rods 3 do not touch each other. After air drying, two nuts 10 are screwed into the two metal threaded rods 3 respectively. The nuts 10 move along the metal threaded rods 3, pressing and fixing the hexagonal insert block 7, thereby pressing the hexagonal insert block 7 and the heat dissipation reinforcing blocks 6 on it, thus tightly pressing and fixing the heat dissipation reinforcing blocks 6 into the inner side of the insert groove 5. Then, two metal crank arm heads 4 are screwed into the threaded rods respectively, and the nuts 10 are used to lock the two metal crank arm heads 4. The heat dissipation reinforcing blocks 6 strengthen the hardness of the hexagonal insulating rod 1, while the auxiliary connecting rods 9 inside the auxiliary connecting grooves 8 between the six pairs of insert grooves 5 provide auxiliary reinforcement.
[0020] In summary, the hexagonal insulating rod 1 is made of polyetheretherketone (PEEK). The rod has six pairs of symmetrically distributed insertion slots 5 along its axial direction, and threaded holes 2 with AB adhesive coating at both ends. Six pairs of heat dissipation reinforcement blocks 6 are mechanically interlocked into the insertion slots 5, forming a three-dimensional support network between adjacent heat dissipation reinforcement blocks 6 via auxiliary connecting rods 9. Tin-plated metal threaded rods 3 are screwed in using a non-contact layout, ensuring an electrical clearance of at least 5mm between the two rods. After the adhesive cures to form a multi-layered insulating barrier, an axial preload is applied to the hexagonal insertion blocks 7 using a back-to-back locking structure with double nuts 10, ensuring a tight molecular-level bond between the PEEK matrix and the ceramic heat dissipation layer. Finally, a metal crank head 4 with an insulating bushing is assembled to the end of the threaded rod using an interference fit.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A low cost high insulation performance bell crank arrangement based on composite construction, characterized in that, The device includes an insulating connecting block, which comprises: a hexagonal insulating rod, a pair of threaded holes on the hexagonal insulating rod, a metal threaded rod inside the pair of threaded holes, a metal crank head on each of the pair of metal threaded rods, six pairs of insertion slots on the hexagonal insulating rod, the six pairs of insertion slots being arranged on both sides of the hexagonal insulating rod, heat dissipation reinforcement blocks inside the six pairs of insertion slots, and a pair of hexagonal insertion blocks on each of the six pairs of heat dissipation reinforcement blocks.
2. A low cost high insulation performance toggle device based on composite structure as claimed in claim 1, wherein, The hexagonal insulating rod has multiple auxiliary connecting slots, and auxiliary connecting rods are respectively provided on the inner side of the multiple auxiliary connecting slots. The multiple auxiliary connecting rods are located between the six pairs of heat dissipation reinforcement blocks.
3. A low cost high insulation performance toggle device based on composite structure as claimed in claim 2, wherein, Each of the two metal threaded rods is provided with a pair of nuts.
4. A low cost high insulation performance toggle device based on composite structure as claimed in claim 3, wherein, AB glue is provided on the inner side of the pair of threaded holes.
5. A low cost high insulation performance toggle arrangement based on composite construction as claimed in claim 4, wherein, The hexagonal insulating rod is made of polyetheretherketone.
6. A low cost high insulation performance toggle device based on composite structure as claimed in claim 5, wherein, The outer sides of the four pairs of auxiliary connecting rods and the four pairs of heat dissipation reinforcement blocks are tin-plated.