Secondary overflow valve multi-union sharing structure of electric proportional forklift valve group
By designing a multi-connected common structure of secondary relief valves and a replaceable plug in the electric proportional forklift valve set, the problem that the prior art cannot control multiple oil ports and multi-connected working connections at the same time is solved, and the effect of reducing manufacturing costs, simplifying the structure and reducing failure rate is achieved.
Patent Information
- Application Number
- CN202421416804.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing electric proportional forklift valve cannot control multiple oil ports and multiple working connections at the same time, resulting in high manufacturing costs and increased risk of failure, which cannot meet the customer's variability requirements.
A multi-connected common structure of secondary relief valves of electric proportional forklift valve set is designed, and the common pressure control of single or two-connected actions of secondary relief valves is achieved through integrated valve blocks and replaceable plugs (such as plunger a and plunger b).
With the valve body unchanged, multiple control is achieved by replacing the plug, which reduces manufacturing costs, simplifies the structure, reduces the failure rate, and improves user flexibility and convenience.
Smart Images
Figure CN222907488U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic valves, in particular to a multi - joint shared structure of a secondary overflow valve of an electro - proportional forklift valve group. Background Technique
[0002] The electro - proportional forklift valve is mainly used in electric forklifts. The secondary overflow valve is used to control the pressure limit of the auxiliary joint of the electro - proportional forklift valve, so as to control the pressure of the auxiliary function of the electric forklift. The common secondary overflow valve for electro - proportional forklift valves can only control one oil port or the oil port of a certain working joint, and cannot control multiple oil ports and multiple working joints at the same time. If it is necessary to control multiple oil ports or working joints, it is necessary to change the valve body design and increase the number of secondary overflow valves, which will increase the types of valve bodies and the cost of products. Increasing the number of secondary overflow valves will also increase the risk of product application failures and cannot meet the variable requirements of customers. Content of the Utility Model
[0003] The purpose of the utility model is to provide a multi - joint shared structure of a secondary overflow valve of an electro - proportional forklift valve group to solve the problems raised in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A multi - joint shared structure of a secondary overflow valve of an electro - proportional forklift valve group, including an integrated valve block of the electro - proportional forklift valve group. A secondary overflow valve and a shuttle valve are respectively installed in the integrated valve block. An oil passage a and an oil passage b that are connected to two input ends of the shuttle valve are respectively arranged in the integrated valve block. The other ends of the oil passage a and the oil passage b are both connected to a feedback circuit. A plug is screwed and installed in the valve block, and the plug is located between the shuttle valve and the secondary overflow valve. One input end or the output end of the shuttle valve is communicated with the input end of the secondary overflow valve through the plug.
[0005] Preferably, the plug is a plunger a. The plunger a includes a core. A blind hole extending axially inward is arranged at the inner end of the core. A through - hole in the radial direction is arranged in the middle of the core. The inner end of the blind hole is communicated with the radial hole. An oil passage c communicated with the output end of the shuttle valve is arranged inside the valve block. The end of the oil passage c is connected to the end of the blind hole. The input end of the secondary overflow valve is connected to the radial hole.
[0006] Preferably, the plug is a plunger b. After the plunger b is screwed and installed, an annular flow passage is formed on the outside. The annular flow passage connects the oil passage b and the input end of the secondary overflow valve.
[0007] Compared with the prior art, the beneficial effect of the utility model is that: without changing the valve body, only by replacing the plug, the common pressure control of the single - joint or two - joint actions of the secondary overflow valve of the electro - proportional forklift valve can be realized, which is beneficial to reducing the manufacturing cost, simplifying the structure, and reducing the failure rate. Users can select plugs with different structures according to actual usage requirements, and the flexibility and convenience are good. Brief Description of the Drawings
[0008] Figure 1 It is a schematic structural diagram of the present utility model;
[0009] Figure 2 It is a schematic cross-sectional structure diagram in the state of two-way common use of the present utility model;
[0010] Figure 3 It is a schematic cross-sectional view in the single-way state of the present utility model;
[0011] Figure 4 It is a schematic application principle diagram of the present utility model in an electro-hydraulic proportional forklift valve group.
[0012] In the figure: 1. Integrated valve block; 2. Secondary overflow valve; 3. Shuttle valve; 4. Oil passage a; 5. Oil passage b; 6. Plunger a; 61. Core; 62. Blind hole; 63. Radial hole; 7. Plunger b. Detailed Description of the Preferred Embodiment
[0013] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0014] Please refer to Figures 1-4 , the present utility model provides a technical solution: a multi-way common structure of the secondary overflow valve of an electro-hydraulic proportional forklift valve group, including an integrated valve block 1 of the electro-hydraulic proportional forklift valve group, a secondary overflow valve 2 and a shuttle valve 3 are respectively installed in the integrated valve block 1, oil passages a 4 and b 5 leading to the two input ends of the shuttle valve 3 are respectively provided in the integrated valve block 1, the other ends of the oil passages a 4 and b 5 are both connected to the feedback circuit of the electro-hydraulic proportional forklift valve group, a plug is screwed and installed in the valve block, the plug is located between the shuttle valve 3 and the secondary overflow valve 2, one input end or the output end of the shuttle valve 3 is communicated with the input end of the secondary overflow valve 2 through the plug, the plug has two structures, and two different connection methods (i.e., the single-way and two-way connection states of the secondary overflow valve 2) are realized through the plugs of the two structures, and the user can select the plug of one of the structures according to the actual use requirements.
[0015] One structure of the plug is a plunger a 6, the plunger a 6 includes a core 61, a blind hole 62 extending axially inward is provided at the inner end of the core 61, a through radial hole 63 is provided in the middle of the core 61, the inner end of the blind hole 62 is communicated with the radial hole 63, an oil passage c communicated with the output end of the shuttle valve 3 is provided inside the valve block, the oil passage c is connected to the port of the blind hole 62, the input end of the secondary overflow valve 2 is connected to the radial hole 63, and a ring groove is provided at the outer port of the radial hole 63 of the plunger a 6 so that the plunger a 6 can maintain the oil conduction at any circumferential position. For the schematic diagram, please refer to Figure 4 The partial view in the lower right corner.
[0016] Another structure of the plug is the plunger b7. After being screwed in and installed, the plunger b7 forms an annular flow passage on the outside, and the annular flow passage connects the oil passage b5 and the input end of the secondary overflow valve 2. When the plunger b7 is used, the secondary overflow valve 2 unloads the single connection. See the local drawing in the upper right corner for the schematic diagram. Figure 4 The partial drawing in the upper right corner.
[0017] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A secondary overflow valve multi-connection common structure of an electric proportional forklift valve group, comprising an integrated valve block (1) of the electric proportional forklift valve group, characterized in that: The integrated valve block (1) is respectively provided with a secondary relief valve (2) and a shuttle valve (3); the integrated valve block (1) is respectively provided with an oil passage a (4) and an oil passage b (5) connected to two input ends of the shuttle valve (3); the other ends of the oil passage a (4) and the oil passage b (5) are both connected to a feedback loop; a plug is threadedly installed in the valve block; the plug is located between the shuttle valve (3) and the secondary relief valve (2); one input end of the shuttle valve (3) or the output end of the shuttle valve (3) is connected to the input end of the secondary relief valve (2) via the plug.
2. The secondary relief valve multi-connection common structure of the electric proportional forklift valve group according to claim 1 is characterized in that: The plug is a plunger a (6), and the plunger a (6) comprises a column core (61). The inner end of the column core (61) is provided with a blind hole (62) extending axially inward, and the middle of the column core (61) is provided with a penetrating radial hole (63). The inner end of the blind hole (62) is connected to the radial hole (63). The valve block is provided with an oil passage c connected to the output end of the shuttle valve (3). The end of the oil passage c is connected to the blind hole (62), and the input end of the secondary relief valve (2) is connected to the radial hole (63).
3. The secondary relief valve multi-connection common structure of the electric proportional forklift valve group according to claim 1 is characterized in that: The plug is a plunger b (7), which forms an annular flow channel on the outside after being screwed in and installed, and the annular flow channel connects the oil channel b (5) and the input end of the secondary overflow valve (2).