Manual double-pull front cover lock
By designing a manual double-pull front cover lock, which employs a ratchet through-hole groove and a pawl plastic-coated structure, the jamming and noise problems of traditional front cover locks are solved, achieving smoother opening and reduced costs.
Patent Information
- Application Number
- CN202520426004.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Traditional front cover locks pose a risk of jamming when opening, are inconvenient to operate, and are noisy, so it is necessary to improve the smoothness and reduce the noise.
A manual double-pull front cover lock was designed. By arranging the engagement and limiting positions, the weight was reduced by using a ratchet through-hole groove, and the pawl and ratchet were plastic-coated to increase strength and reduce noise.
It effectively reduces the risk of jamming at the opening limit, lowers the cost of ratchet consumables, reduces noise, and increases the lock's service life.
Smart Images
Figure CN223922835U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a manual double-pull front cover lock. Background Technology
[0002] With the continuous development of the automotive industry, consumers have increasingly higher requirements for the safety, comfort, and convenience of automobiles. Traditional hood locks require pulling the release lever once from inside the driver's cab, and then manually pulling the safety hook in front of the hood to lift it up. This operation is inconvenient. Therefore, the manual double-pull hood lock has become an important safety component for automobile hoods.
[0003] However, in the process of implementing the utility model technical solution in the embodiments of this application, the applicant discovered that the above-mentioned technology has at least the following technical problems:
[0004] Traditional front cover locks have the risk of jamming when opening, so it is necessary to increase the smoothness of opening and ensure that they can be opened smoothly in the long term. The ratchet and pawl will make noise during use, so they need to be improved to meet current usage needs. Utility Model Content
[0005] This application provides a manual double-pull front cover lock. By arranging the engagement and limiting positions, the risk of jamming during opening can be effectively reduced. The through-hole groove effectively reduces the weight of the ratchet, reduces ratchet material consumption, and reduces processing costs. The plastic-coated structure not only reduces noise but also increases strength.
[0006] This application provides a manual double-pull front cover lock, including: a lock body, a cover plate, and a lock plate. The lock plate is provided with a limit block, the lock body is provided with a limit groove that cooperates with the limit block, the lock body is provided with a pin spring, and the lock body is provided with a bushing. The lock body is rotatably connected to the lock body via a positioning shaft and a support shaft. The pawl is provided with a pawl engagement latch and a pawl half-lock unlock limit. The ratchet is provided with a ratchet first engagement latch, a ratchet second engagement latch, and a ratchet half-lock unlock limit. The ratchet is provided with a through hole groove in the middle, and a pawl return spring is sleeved on the pawl and the ratchet return spring is sleeved on the ratchet.
[0007] Furthermore, the pawl is provided with a fixing member, which cooperates with the pull line to connect the pull line to the pawl. The fixing member and the pawl are integrally formed, and the pawl is rotated counterclockwise by the pull line.
[0008] When the front cover lock is in the fully locked state, the pawl engagement latch engages with the first ratchet engagement latch to limit the movement;
[0009] During the half-lock unlocking process of the front cover lock, the pawl is pulled counterclockwise by the pull cable, the pawl engagement latch disengages from the first engagement latch of the ratchet, and the pawl half-lock unlocking limit is tightly attached to the ratchet half-lock unlocking limit;
[0010] When the front cover is in a half-locked state, the pull cable is released, the pawl rotates clockwise, and the pawl engagement latch engages with the second engagement latch of the ratchet wheel to limit and fix the position.
[0011] When the front cover lock is in the unlocked state, the pawl is pulled again by the pull cable. The pawl rotates counterclockwise, and the pawl engagement latch disengages from the second engagement latch of the ratchet. The ratchet rotates clockwise due to the ratchet return spring, thus achieving the unlocked state of the front cover lock.
[0012] Furthermore, the first ratchet engagement latch, the second ratchet engagement latch, and the ratchet half-lock unlocking limit are evenly arranged counterclockwise on the ratchet, the pawl engagement latch is located at the upper end of the pawl, and the pawl half-lock unlocking limit is located at a position slightly below the middle of the pawl.
[0013] Furthermore, the pawl and ratchet rotate along the positioning axis, the pawl return spring applies a clockwise rotational force to the pawl, and the ratchet return spring applies a counterclockwise rotational force to the ratchet.
[0014] Furthermore, the ratchet and ratchet are internally made of metal and externally coated with plastic. The plastic coating covers the metal components, but the ratchet engagement latch and ratchet half-lock unlock limit are not coated with plastic.
[0015] Furthermore, the through-hole groove is located at the center of the ratchet, and the size and shape of the through-hole groove are set according to the actual situation.
[0016] Furthermore, the limiting block is embedded in and closely abuts the limiting groove, and the limiting block and the locking plate are integrally formed.
[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0018] 1. The ratchet first engagement latch and ratchet second engagement latch are used to engage with the ratchet pawl engagement latch on the pawl. The ratchet pawl and ratchet are limited by the ratchet half-lock unlock limit and the ratchet half-lock unlock limit. By arranging the engagement position and the limit position, the risk of opening limit jamming can be effectively reduced.
[0019] 2. By setting through-hole grooves on the ratchet, the weight of the ratchet can be effectively reduced, the consumption of ratchet materials can be reduced, and the processing cost can be reduced.
[0020] 3. The pawl and ratchet adopt a plastic-coated structure, with a metal internal structure and a plastic external structure, which not only reduces noise but also increases strength. Attached Figure Description
[0021] Figure 1 This is an exploded view of a manual double-pull front cover lock according to this application;
[0022] Figure 2 This is a schematic diagram of the pawl structure in a manual double-pull front cover lock according to this application;
[0023] Figure 3 This is a schematic diagram of the ratchet mechanism in a manual double-pull front cover lock according to this application;
[0024] Figure 4 This is a schematic diagram of the fully locked state of a manual double-pull front cover lock according to this application;
[0025] Figure 5 This is a diagram illustrating the half-lock unlocking process of a manual double-pull front cover lock according to this application;
[0026] Figure 6 This is a schematic diagram of the semi-locked state of a manual double-pull front cover lock according to this application;
[0027] Figure 7 This is a schematic diagram of the unlocking state of a manual double-pull front cover lock according to this application;
[0028] Figure 8 This is a cross-sectional view of a manual double-pull front cover lock according to this application. Detailed Implementation
[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example
[0030] As shown in the attached drawings: A manual double-pull front cover lock includes: a lock body 6, a cover plate 1, and a lock plate 7. The lock plate 7 is provided with a limit block 701. The lock body 6 is provided with a limit groove that cooperates with the limit block 701. The lock body 6 is provided with a pin spring 4. A bushing 5 is provided inside the lock body 6. A pawl 2 and a ratchet 3 are rotatably connected to the lock body 6 via a positioning shaft 8 and a support shaft 9. The pawl 2 is provided with a pawl engagement latch 201 and a pawl half-lock unlocking limit 202. The ratchet 3 is provided with a ratchet first engagement latch 301, a ratchet second engagement latch 302, and a ratchet half-lock unlocking limit 303. The ratchet 3 has a central portion... A through-hole groove 304 is provided, a pawl return spring 11 is sleeved on the pawl 2, and a ratchet return spring 10 is sleeved on the ratchet 3; the through-hole groove 304 is located at the center of the ratchet 3, and the size and shape of the through-hole groove 304 are set according to the actual situation; the limiting block 701 is embedded in the limiting groove and closely abuts the limiting groove, and the limiting block 701 and the locking plate 7 are integrally formed; the ratchet first engagement buckle 301, the ratchet second engagement buckle 302 and the ratchet half-lock unlocking limit 303 are evenly arranged counterclockwise on the ratchet 3, the pawl engagement buckle 201 is located at the upper end of the pawl 2, and the pawl half-lock unlocking limit 202 is located at the lower middle position of the pawl 2.
[0031] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:
[0032] The device employs a ratchet first engagement latch 301 and a ratchet second engagement latch 302 to engage with the ratchet pawl engagement latch 201 on the pawl 2. The ratchet pawl half-lock unlocking limit 202 and the ratchet half-lock unlocking limit 303 limit the movement between the pawl 2 and the ratchet 3. By arranging the engagement and limit positions, the risk of jamming during opening can be effectively reduced. After multiple comparative tests, the jamming risk has been significantly reduced by 10%-20% through the engagement and limit structure of this application.
[0033] A limiting block 701 and a limiting groove are added between the lock body 6 and the lock plate 7 to limit and fix the lock body 6, which improves the stability of the connection. The limiting block 701 is integral with the lock plate 7, so the limiting block 701 is not easy to break or be damaged, which increases the strength of the limiting block 701 and extends its service life.
[0034] By setting a through-hole groove 304 on the ratchet 3, the weight of the ratchet 3 can be effectively reduced, the material consumption of the ratchet 3 can be reduced, and the processing cost can be reduced. The through-hole groove 304 is determined in size and shape after multiple high-strength tests according to customer needs and meets the strength and other requirements. Example
[0035] A manual double-pull front cover lock, wherein a fixing member is provided on the pawl 2, the fixing member cooperates with the pull cable, the pull cable is connected to the pawl 2 through the fixing member, the fixing member and the pawl 2 are integrally formed, and the pawl 2 is rotated counterclockwise by the pull cable.
[0036] The pawl 2 and ratchet 3 rotate along the positioning shaft 8. The pawl return spring 11 applies a clockwise rotational force to the pawl 2, and the ratchet return spring 10 applies a counterclockwise rotational force to the ratchet 3.
[0037] The ratchet 2 and ratchet 3 are internally made of metal and externally coated with plastic. The plastic coating covers the metal components, but the ratchet engagement latch 201 and ratchet half-lock unlock limit 202 are not coated with plastic.
[0038] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:
[0039] The pawl 2 and ratchet 3 adopt a plastic-coated structure, with a metal internal structure and a plastic external structure, which not only reduces noise but also increases strength.
[0040] As attached Figure 4 As shown: When the front cover lock is in the fully locked state, the pawl engagement latch 201 cooperates with the ratchet first engagement latch 301 to limit the movement;
[0041] As attached Figure 5 As shown: During the half-lock unlocking process of the front cover lock, the pawl 2 is pulled counterclockwise by the pull cable, the pawl engagement buckle 201 disengages from the first engagement buckle 301 of the ratchet, and the pawl half-lock unlocking limit 202 is in close contact with the ratchet half-lock unlocking limit 303.
[0042] As attached Figure 6 As shown: When the front cover lock is in a half-locked state and the pull cable is released, the pawl 2 rotates clockwise, and the pawl engagement buckle 201 engages with the ratchet second engagement buckle 302 to limit and fix the position;
[0043] As attached Figure 7 As shown: In the unlocked state of the front cover lock, the pawl 2 is pulled again by the pull cable. The pawl 2 rotates counterclockwise, and the pawl engagement latch 201 disengages from the second engagement latch 302 of the ratchet. The ratchet 3 rotates clockwise due to the ratchet return spring 10, and at this time the front cover lock is unlocked.
[0044] Working principle: When the front cover lock is fully locked, the pawl engagement latch 201 engages with the first ratchet engagement latch 301 to limit the movement, and the ratchet 3 and pawl 2 are locked in place. When unlocking is required, the pawl 2 is pulled counterclockwise by the cable. At this time, the pawl engagement latch 201 disengages from the first ratchet engagement latch 301, and the pawl half-lock unlock limit 202 presses against the ratchet half-lock unlock limit 303. The pawl 2 stops rotating, and the cable is released. At this time, the pawl engagement latch 201 engages with the second ratchet engagement latch 302 and enters the half-lock unlock state. Pulling the cable again disengages the pawl engagement latch 201 from the second ratchet engagement latch 302, and unlocking is achieved.
[0045] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0046] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A manual double-pull front cover lock, comprising: A lock body, a cover plate, and a lock plate, characterized in that: a limit block is provided on the lock plate; a limit groove that cooperates with the limit block is provided on the lock body; a pin spring is provided on the lock body; a bushing is provided inside the lock body; a pawl and a ratchet are rotatably connected to the lock body via a positioning shaft and a support shaft; the pawl is provided with a pawl engagement latch and a pawl half-lock unlock limit; the ratchet is provided with a ratchet first engagement latch, a ratchet second engagement latch, and a ratchet half-lock unlock limit; a through-hole groove is provided in the middle of the ratchet; a pawl return spring is sleeved on the pawl; and a ratchet return spring is sleeved on the ratchet.
2. The manual double-pull front cover lock as described in claim 1, characterized in that, The pawl is provided with a fixing member, which cooperates with the pull line to connect the pull line to the pawl. The fixing member and the pawl are integrally formed. The pull line is used to rotate and pull the pawl counterclockwise. When the front cover lock is in the fully locked state, the pawl engagement latch engages with the first ratchet engagement latch to limit the movement; During the half-lock unlocking process of the front cover lock, the pawl is pulled counterclockwise by the pull cable, the pawl engagement latch disengages from the first engagement latch of the ratchet, and the pawl half-lock unlocking limit is tightly attached to the ratchet half-lock unlocking limit; When the front cover is in a half-locked state, the pull cable is released, the pawl rotates clockwise, and the pawl engagement latch engages with the second engagement latch of the ratchet wheel to limit and fix the position. When the front cover lock is in the unlocked state, the pawl is pulled again by the pull cable. The pawl rotates counterclockwise, and the pawl engagement latch disengages from the second engagement latch of the ratchet. The ratchet rotates clockwise due to the ratchet return spring, thus achieving the unlocked state of the front cover lock.
3. A manual double-pull front cover lock as described in claim 1, characterized in that, The ratchet first engagement latch, ratchet second engagement latch, and ratchet half-lock unlocking limit are evenly arranged counterclockwise on the ratchet. The pawl engagement latch is located at the upper end of the pawl, and the pawl half-lock unlocking limit is located at the lower middle position of the pawl.
4. A manual double-pull front cover lock as described in claim 1, characterized in that, The pawl and ratchet rotate along the positioning axis. The pawl return spring applies a clockwise rotational force to the pawl, and the ratchet return spring applies a counterclockwise rotational force to the ratchet.
5. A manual double-pull front cover lock as described in claim 1, characterized in that, The ratchet and ratchet have metal internal components and plastic coating externally. The plastic coating covers the metal components, but the ratchet engagement latch and ratchet half-lock unlock limit are not coated.
6. A manual double-pull front cover lock as described in claim 1, characterized in that, The through-hole groove is located at the center of the ratchet, and the size and shape of the through-hole groove are set according to the actual situation.
7. A manual double-pull front cover lock as described in claim 1, characterized in that, The limiting block is embedded in the limiting groove and closely abuts the limiting groove. The limiting block and the locking plate are integrally formed.