CN218092563U

CN218092563U - Lock body fixing structure of self-suction tail door lock

Info

Publication number: CN218092563U
Application number: CN202222181136.XU
Authority: CN
Inventors: 陈盛; 林文清
Original assignee: Ningbo Linjian Intelligent Technology Co ltd
Current assignee: Ningbo Linjian Intelligent Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-12-20
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a lock body fixing structure of a self-suction tail door lock, which comprises a lock body mechanism for locking a tail door and a vehicle body of an automobile and a lock body fixing structure for fixing the lock body mechanism; the lock body fixing structure comprises a first shell for accommodating the lock body mechanism, the first shell comprises an upper shell and a lower shell which are detachably mounted, and the upper shell and the lower shell are provided with opening parts for locking the automobile tail door and the lock body mechanism together; the lock body mechanism is characterized in that a fixing part for fixing the lock body mechanism and a limiting part for limiting the lock body mechanism are arranged between the upper shell and the lower shell. The utility model fixes the lock body mechanism through the first shell and the fixing part, cancels the plastic locking block, reduces the number of opened plastic molds, reduces the mold opening cost, the injection molding period and the risk of bad finished products, has simple assembly and is convenient for subsequent disassembly and maintenance; and the whole weight of the tail gate lock is reduced.

Description

Lock body fixing structure of self-suction tail door lock

Technical Field

The utility model relates to a technical field of tail-gate lock especially relates to a from inhaling lock body fixed knot of tail-gate lock constructs.

Background

The automobile trunk is an important part for storing articles in a vehicle, and in the daily use process, people usually store the articles in the trunk, and the safety of storing the articles is ensured by the trunk through a trunk door lock. In the prior art, the plastic locking block is arranged in the shell and used for fixing the locking mechanism, a plurality of plastic molds need to be opened to meet the functions, the cost is high, the period is long, the assembling procedures are multiple, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The technical problem to be solved by the utility model is to provide a lock body fixing structure of self-priming tail door lock, fix the lock body mechanism through the first shell and the fixed part, cancel the plastic locking piece, reduce and open the plastic mould quantity, reduce the die sinking utensil cost and injection moulding cycle and the bad finished product risk that causes, the assembly is simple, the subsequent dismouting maintenance of being convenient for; and the whole weight of the tail gate lock is reduced.

(II) technical scheme

The utility model solves the technical problems and adopts a scheme that the self-priming tail door lock adopts a lock body fixing structure, and the self-priming tail door lock comprises a lock body mechanism for locking the automobile tail door and the automobile body and a lock body fixing structure for fixing the lock body mechanism; the lock body fixing structure comprises a first shell for accommodating the lock body mechanism, the first shell comprises an upper shell and a lower shell which are detachably mounted, and the upper shell and the lower shell are provided with opening parts for locking the automobile tail door and the lock body mechanism together; the lock body mechanism is characterized in that a fixing part for fixing the lock body mechanism and a limiting part for limiting the lock body mechanism are arranged between the upper shell and the lower shell.

Specifically, the self-suction tail door lock is arranged on a vehicle body and is matched with a tail door of an automobile for locking; the upper shell and the lower shell are made of sheet metal guard plates.

By adopting the scheme, the lock body mechanism is accommodated by the first shell, the lock body mechanism is fixed by the fixing part, and the lock body mechanism is limited by the limiting part, so that the lock body mechanism is simple to assemble and convenient to disassemble, assemble and maintain subsequently; the plastic locking block is eliminated, the number of plastic mold opening is reduced, and the mold opening cost, the injection molding period and the finished product risk caused by poor performance are reduced; and the overall weight of the tail gate lock is reduced.

Further, the lock body mechanism comprises a ratchet wheel and a pawl which can be meshed and locked with each other, the fixing portion comprises a ratchet wheel fixing portion used for fixing the ratchet wheel and a pawl fixing portion used for fixing the pawl, the ratchet wheel can rotate around the ratchet wheel fixing portion, and the pawl can rotate around the ratchet wheel fixing portion.

Preferably, the ratchet wheel fixing part comprises a first positioning pin and a first fixing part, wherein two ends of the first positioning pin are respectively connected to the upper shell and the lower shell, and the first fixing part is sleeved outside the first positioning pin; the first fixing part comprises a first matching part used for matching the ratchet wheel and a first interference part formed at the lower end of the first matching part and used for separating the ratchet wheel and the lower shell, so that the ratchet wheel can rotate smoothly; the pawl fixing part comprises a second positioning pin and a second fixing part, wherein two ends of the second positioning pin are respectively connected to the upper shell and the lower shell, and the second fixing part is sleeved outside the second positioning pin; the second fixing portion includes a second fitting portion for fitting the pawl, and a second interference portion formed at a lower end of the second fitting portion for separating the pawl from the lower case so that the pawl can smoothly rotate.

Further, the lock body mechanism further comprises a ratchet reset piece for resetting the ratchet and a pawl reset piece for resetting the pawl; the limiting portion comprises a ratchet limiting portion used for abutting against the ratchet resetting piece and a pawl limiting portion used for abutting against the pawl resetting piece.

Further, the ratchet reset piece comprises a first mounting part sleeved on the ratchet fixing part, a first connecting part with one end limited on the ratchet, and a first abutting part with the other end abutting against the ratchet limiting part; the pawl resets and establishes including the cover second installation department, one end on the pawl fixed part are limited second connecting portion and the other end on the pawl support and lean on second on the pawl restriction portion supports and leans on the portion.

Preferably, the first mounting part is matched with the first matching part at the upper end of the ratchet wheel, and the second mounting part is matched with the second matching part at the upper end of the ratchet wheel; the ratchet comprises a first clamping groove used for clamping the first connecting portion, and the pawl comprises a second clamping groove used for clamping the second connecting portion.

Specifically, after the ratchet wheel is driven to rotate, the first connecting part of the ratchet wheel resetting piece rotates synchronously with the ratchet wheel, and the first abutting part is limited on the ratchet wheel limiting part; when the force acting on the ratchet wheel is cancelled, the resilience force of the ratchet wheel resetting piece drives the ratchet wheel to rotate reversely for resetting; when the pawl is driven to rotate, the second connecting part of the pawl resetting piece synchronously rotates along with the pawl, and the second abutting part is limited on the pawl limiting part; the resilience force of the pawl resetting member drives the pawl to rotate reversely and reset after the force acting on the pawl is cancelled.

Further, the lower shell comprises a lower bottom wall for mounting the lock body mechanism and a lower side wall formed by upwards extending two side ends of the lower bottom wall; the two lower side walls form an opening part at the front end of the lower bottom wall, and a lower V-shaped opening is formed at the position, close to the opening part, of the lower bottom wall and is inwards recessed; the upper shell comprises an upper top wall which is coated on the upper end of the lower bottom wall and is lapped on the two lower side walls, the upper top wall is inwards recessed near the opening part to form an upper V-shaped opening, and the lower V-shaped opening, the upper V-shaped opening and the opening part are matched to form the opening part; and the upper top wall is positioned at two ends of the upper V-shaped opening and extends downwards to form an extending wall for closing part of the opening part.

Furthermore, a plurality of clamping grooves are formed in the tops of the two lower side walls, and correspondingly, a plurality of clamping convex parts matched with the clamping grooves are arranged on the upper top wall.

Furthermore, an upper locking part and a lower locking part which are matched with each other are formed by transversely extending one ends of the upper shell and the lower shell far away from the opening part.

Specifically, the cooperation of the clamping groove and the clamping convex part can realize the cooperation between the upper shell and the lower shell, and the cooperation of the upper locking part and the lower locking part can realize the locking between the upper shell and the lower shell; the first positioning pin, the second positioning pin, the ratchet limiting part and the pawl limiting part can also realize the fastening fit between the upper shell and the lower shell; by the structure, the assembly tightness between the upper shell and the lower shell can be realized, so that the locking mechanism is stably installed and is not easy to loosen; and the disassembly and the assembly are convenient and the assembly is simple.

Furthermore, the self-priming tail door lock further comprises an unlocking mechanism for unlocking the lock body mechanism and a locking mechanism for driving the lock body mechanism to be locked; one end of the shell, which is far away from the opening part of the shell, is connected with a second shell used for installing the unlocking mechanism and the locking mechanism, and the inner cavity of the second shell is communicated with the inner cavity of the first shell.

Specifically, the unlocking mechanism is arranged in the second shell, so that the unlocking mechanism can directly drive the pawl to rotate, the pawl is disengaged from the ratchet wheel, and unlocking is realized; the locking mechanism is arranged on the back of the second shell and comprises a rotating rod for driving the ratchet wheel to rotate, and the locking mechanism comprises an electric push rod which can do linear reciprocating telescopic motion and can drive the rotating rod to rotate in the forward direction and the reverse direction so as to realize the rotation of the ratchet wheel; the second shell and the coating part are provided with a first extending opening for the rotating rod to extend out, and the opening range of the first extending opening is larger than the rotating stroke of the rotating rod, so that the rotating rod can smoothly drive the ratchet wheel to rotate.

Further, the second shell and the first shell are arranged in an opposite inclined mode, and an obtuse angle is formed between the second shell and the first shell; and one end of the lower shell, which is far away from the opening part, is bent upwards to form a coating part coated on the second shell.

Preferably, the first shell is connected with the second shell through the cladding part, so that the overall structure is firmer.

Furthermore, a manual unlocking mechanism for manually unlocking the lock body mechanism is further arranged in the first shell, and the manual unlocking mechanism comprises an unlocking driving rod penetrating through the upper shell and an unlocking resetting piece for resetting the unlocking driving rod; the part of the unlocking driving rod, which is positioned in the shell, is used for driving the pawl to rotate so as to be separated from the ratchet wheel for unlocking, and the part of the unlocking driving rod, which extends out of the upper shell, is used for receiving external stress; the unlocking reset piece is arranged on the part of the unlocking driving rod extending out of the upper shell.

Specifically, the upper shell is provided with a second extending opening for the unlocking driving rod to extend out, and the upper shell is provided with a limiting area for limiting the swing stroke of the unlocking driving rod.

By adopting the scheme, the setting of the unlocking driving rod can compensate the unlocking driving rod when the electrically started unlocking mechanism cannot be started, and the unlocking can be manually carried out.

(III) advantageous effects

Compared with the prior art, the utility model designs a lock body fixing structure of a self-suction tail door lock,

(1) The utility model fixes the lock body mechanism through the first shell and the fixing part, cancels the plastic locking block, reduces the number of opened plastic molds, reduces the mold opening cost, the injection molding period and the risk of bad finished products, has simple assembly and is convenient for subsequent disassembly and maintenance; the whole weight of the tail gate lock is reduced;

(2) In the utility model, the matching of the clamping groove and the clamping convex part can realize the matching between the upper shell and the lower shell, and the matching of the upper locking part and the lower locking part can realize the locking between the upper shell and the lower shell; the first positioning pin, the second positioning pin, the ratchet limiting part and the pawl limiting part can also realize the fastening fit between the upper shell and the lower shell; by the structure, the assembly tightness between the upper shell and the lower shell can be realized, so that the locking mechanism is stably installed and is not easy to loosen; and the disassembly and the assembly are convenient and the assembly is simple.

Drawings

FIG. 1 is a schematic view of a self-priming tail door lock of the present embodiment;

FIG. 2 is an exploded view of the self-priming tail door lock of the present embodiment;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a schematic view of the first housing of the present embodiment;

FIG. 5 is a schematic view of the upper housing of the present embodiment;

FIG. 6 is a schematic view of the lower case of the present embodiment;

fig. 7 is another angle view of the self-priming tail door lock of the present embodiment.

Description of reference numerals: 1. self-suction tail door lock; 11. a lock body mechanism; 111. a ratchet wheel; 111-1, a first clamping groove; 112. a pawl; 112-1 and a second clamping groove; 113. a ratchet reset member; 113-1, a first mounting portion; 113-2, a first connection; 113-3, a first abutting portion; 114. a pawl return; 114-1, a second mounting portion; 114-2, a second connecting part; 114-3, a second abutting part; 12. a first housing; 121. an upper housing; 121-1, an upper top wall; 121-1a, an upper V-shaped opening; 121-1b, a snap projection; 121-2, an extension wall; 121-3, an upper locking part; 121-4, a second extension port; 121-5, a limiting area; 122. a lower housing; 122-1, lower bottom wall; 122-1a, lower V-shaped opening; 122-2, lower sidewall; 122-2a and a clamping groove; 122-3, an open part; 122-4, a lower locking portion; 122-5, a cladding; 123. an opening part; 124. a ratchet wheel fixing part; 124-1, a first locating pin; 124-2, a first fixing part; 124-2a, a first mating portion; 124-2b, a first interference part; 125. a pawl fixing portion; 125-1, a second positioning pin; 125-2, a second fixed part; 125-2a, a second mating portion; 125-2b, a second interference part; 126. a ratchet limiting part; 127. a pawl restricting portion; 13. an unlocking mechanism; 14. a locking mechanism; 141. rotating the rod; 142. an electric push rod; 15. a second housing; 16. a manual unlocking mechanism; 161. Unlocking the driving rod; 162. unlocking the reset piece; 17. a first protrusion opening.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In this embodiment:

as shown in fig. 1-7, a lock body fixing structure of a self-priming tail door lock of the present embodiment, the self-priming tail door lock 1 includes a lock body mechanism 11 for locking a tail door and a vehicle body of an automobile, and a lock body fixing structure for fixing the lock body mechanism 11; the lock body fixing structure comprises a first shell 12 for accommodating the lock body mechanism 11, the first shell 12 comprises an upper shell 121 and a lower shell 122 which are detachably mounted, and the upper shell 121 and the lower shell 122 are provided with an opening part 123 for locking the automobile tail door and the lock body mechanism 11 together; a fixing portion for fixing the lock body mechanism 11 and a restricting portion for restricting the lock body mechanism 11 are installed between the upper case 121 and the lower case 122. Specifically, the self-suction tail door lock 1 is arranged on a vehicle body and is matched with a tail door of an automobile to be locked; the upper housing 121 and the lower housing 122 are made of sheet metal guard plates. By adopting the scheme, the lock body mechanism 11 is accommodated by the first shell 12, the lock body mechanism 11 is fixed by the fixing part, and the lock body mechanism 11 is limited by the limiting part, so that the lock body mechanism is simple to assemble and convenient to disassemble, assemble and maintain subsequently; the plastic locking block is eliminated, the number of plastic mold opening is reduced, and the mold opening cost, the injection molding period and the finished product risk caused by poor performance are reduced; and the overall weight of the tail gate lock is reduced.

Further, the lock body mechanism 11 includes a ratchet wheel 111 and a pawl 112 that can be engaged with each other and locked, the fixing portions include a ratchet wheel fixing portion 124 for fixing the ratchet wheel 111 and a pawl fixing portion 125 for fixing the pawl 112, and the ratchet wheel 111 can rotate around the ratchet wheel fixing portion 124 and the pawl 112 can rotate around the ratchet wheel fixing portion 124. Preferably, the ratchet fixing part 124 includes a first positioning pin 124-1 having two ends respectively connected to the upper case 121 and the lower case 122, and a first fixing part 124-2 sleeved outside the first positioning pin 124-1; the first fixing part 124-2 includes a first engagement part 124-2a for engaging with the ratchet wheel 111, and a first interference part 124-2b formed at a lower end of the first engagement part 124-2a for spacing the ratchet wheel 111 from the lower case 122 so that the ratchet wheel 111 can be smoothly rotated; the pawl fixing part 125 includes a second positioning pin 125-1 having two ends connected to the upper case 121 and the lower case 122, respectively, and a second fixing part 125-2 sleeved outside the second positioning pin 125-1; the second fixing portion 125-2 includes a second engagement portion 125-2a for engaging with the ratchet 112, and a second interference portion 125-2b formed at a lower end of the second engagement portion 125-2a for spacing the ratchet 112 from the lower case 122 so that the ratchet 112 can be smoothly rotated. Further, the lock body mechanism 11 further includes a ratchet reset member 113 for resetting the ratchet 111, and a pawl reset member 114 for resetting the pawl 112; the restricting portion includes a ratchet restricting portion 126 for abutting against the ratchet return 113, and a pawl restricting portion 127 for abutting against the pawl return 114. Further, the ratchet wheel resetting piece 113 comprises a first mounting part 113-1 sleeved on the ratchet wheel fixing part 124, a first connecting part 113-2 with one end limited on the ratchet wheel 111, and a first abutting part 113-3 with the other end abutting against the ratchet wheel limiting part 126; the pawl resetting member 114 includes a second mounting portion 114-1 sleeved on the pawl fixing portion 125, a second connecting portion 114-2 having one end constrained on the pawl 112, and a second abutting portion 114-3 having the other end abutting on the pawl constraining portion 127. Preferably, the first mounting portion 113-1 is matched with the first matching portion 124-2a at the upper end of the ratchet wheel 111, and the second mounting portion 114-1 is matched with the second matching portion 125-2a at the upper end of the ratchet wheel 111; the ratchet wheel 111 includes a first engaging groove 111-1 for engaging with the first connecting portion 113-2, and the pawl 112 includes a second engaging groove 112-1 for engaging with the second connecting portion 114-2. Specifically, after the ratchet wheel 111 is driven to rotate, the first connecting portion 113-2 of the ratchet reset member 113 rotates synchronously with the ratchet wheel 111, and the first abutting portion 113-3 is restricted on the ratchet limiting portion 126; when the force acting on the ratchet wheel 111 is cancelled, the resilience force of the ratchet wheel resetting piece 113 drives the ratchet wheel 111 to rotate reversely for resetting; when the pawl 112 is driven to rotate, the second connecting portion 114-2 of the pawl resetting member 114 rotates synchronously with the pawl 112, and the second abutting portion 114-3 is limited on the pawl limiting portion 127; the resilient force of the pawl return member 114 causes the pawl 112 to rotate in the opposite direction to return when the force on the pawl 112 is removed.

Further, the lower housing 122 includes a lower bottom wall 122-1 for mounting the lock body mechanism 11, and a lower side wall 122-2 formed by extending two side ends of the lower bottom wall 122-1 upwards; the two lower side walls 122-2 form an open part 122-3 at the front end of the lower bottom wall 122-1, and the lower bottom wall 122-1 is recessed inwards near the open part 122-3 to form a lower V-shaped opening 122-1a; the upper casing 121 comprises an upper top wall 121-1 covering the upper end of the lower bottom wall 122-1 and overlapping the two lower side walls 122-2, the upper top wall 121-1 is recessed inwards near the opening portion 122-3 to form an upper V-shaped opening 121-1a, and the lower V-shaped opening 122-1a, the upper V-shaped opening 121-1a and the opening portion 122-3 cooperate to form the opening portion 123; and the upper top wall 121-1 is located at both ends of the upper V-shaped opening 121-1a and extends downwards to form an extension wall 121-2 for closing the opening portion 122-3. Further, a plurality of clamping grooves 122-2a are formed in the tops of the two lower side walls 122-2, and correspondingly, a plurality of clamping protrusions 121-1b matched with the clamping grooves 122-2a are formed in the upper top wall 121-1. Furthermore, an upper locking portion 121-3 and a lower locking portion 122-4, which are matched with each other, are formed at one ends of the upper housing 121 and the lower housing 122, which are far away from the opening 123, in a transverse extending manner. Specifically, the engagement between the locking groove 122-2a and the locking protrusion 121-1b can achieve the engagement between the upper casing 121 and the lower casing 122, and the engagement between the upper locking part 121-3 and the lower locking part 122-4 can achieve the locking between the upper casing 121 and the lower casing 122; and the first positioning pin 124-1, the second positioning pin 125-1, the ratchet limiting part 126 and the pawl limiting part 127 can also realize the tight fit between the upper shell 121 and the lower shell 122; with the structure, the assembling tightness between the upper shell 121 and the lower shell 122 can be realized, so that the locking mechanism is stably installed and is not easy to loosen; and the disassembly and the assembly are convenient and the assembly is simple. Further, the second housing 15 and the first housing 12 are arranged in an inclined manner, and an obtuse angle is formed between the two housings; one end of the lower case 122 away from the opening 123 is bent upward to form a covering portion 122-5 covering the second case 15. Preferably, the first shell 12 is connected to the second shell 15 through the covering portion 122-5, so that the overall structure is more secure.

Further, the self-priming tail door lock 1 further comprises an unlocking mechanism 13 for unlocking the lock body mechanism 11, and a locking mechanism 14 for driving the lock body mechanism 11 to be locked; a second housing 15 for mounting the unlocking mechanism 13 and the locking mechanism 14 is connected to an end of the housing away from the opening 123, and an inner cavity of the second housing 15 and an inner cavity of the first housing 12 are communicated with each other. Specifically, the unlocking mechanism 13 is disposed in the second housing 15, so that the unlocking mechanism directly drives the pawl 112 to rotate, and thus the pawl 112 is disengaged from the ratchet 111 to realize unlocking; the locking mechanism 14 is disposed on the back of the second housing 15 and includes a rotating rod 141 for driving the ratchet 111 to rotate, and in this embodiment, the locking mechanism 14 is an electric push rod 142 capable of performing linear reciprocating telescopic motion to drive the rotating rod 141 to perform forward and reverse rotation so as to rotate the ratchet 111; the second housing 15 and the covering portion 122-5 are provided with a first extending opening 17 for extending the rotating rod 141, and the opening range is larger than the rotating stroke of the rotating rod 141, so that the rotating rod 141 can smoothly drive the ratchet wheel 111 to rotate. Further, a manual unlocking mechanism 16 for manually unlocking the lock body mechanism 11 is further disposed in the first housing 12, and the manual unlocking mechanism 16 includes an unlocking driving rod 161 disposed through the upper housing 121, and an unlocking resetting member 162 for resetting the unlocking driving rod 161; the part of the unlocking driving rod 161 in the housing is used for driving the pawl 112 to rotate to disengage from the ratchet wheel 111 for unlocking, and the part of the unlocking driving rod 161 extending out of the upper housing 121 is used for receiving external force; the unlocking reset member 162 is installed on a portion of the unlocking driving lever 161 protruding out of the upper case 121. Specifically, the upper housing 121 is provided with a second extending port 121-4 through which the unlocking driving rod 161 extends, and the upper housing 121 is provided with a limiting area 121-5 for limiting a swing stroke of the unlocking driving rod 161. By adopting the above scheme, the setting of the unlocking driving rod 161 can compensate the unlocking driving rod 161 and unlock manually when the electrically started unlocking mechanism 13 cannot be started.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a from inhaling lock body fixed knot of tail door lock constructs which characterized in that: the self-suction tail door lock (1) comprises a lock body mechanism (11) for locking an automobile tail door and an automobile body and a lock body fixing structure for fixing the lock body mechanism (11); the lock body fixing structure comprises a first shell (12) used for accommodating the lock body mechanism (11), the first shell (12) comprises an upper shell (121) and a lower shell (122) which are detachably mounted, and the upper shell (121) and the lower shell (122) are provided with opening parts (123) for locking the automobile tail door and the lock body mechanism (11) together; and a fixing part for fixing the lock body mechanism (11) and a limiting part for limiting the lock body mechanism (11) are arranged between the upper shell (121) and the lower shell (122).

2. The lock body fixing structure of the self-priming tail door lock as recited in claim 1, wherein: the lock body mechanism (11) comprises a ratchet wheel (111) and a pawl (112) which can be meshed and locked with each other, the fixing parts comprise a ratchet wheel fixing part (124) used for fixing the ratchet wheel (111) and a pawl fixing part (125) used for fixing the pawl (112), the ratchet wheel (111) can rotate around the ratchet wheel fixing part (124), and the pawl (112) can rotate around the ratchet wheel fixing part (124).

3. The lock body fixing structure of the self-priming tail door lock as recited in claim 2, wherein: the lock body mechanism (11) further comprises a ratchet reset piece (113) for resetting the ratchet (111) and a pawl reset piece (114) for resetting the pawl (112); the restricting portion includes a ratchet restricting portion (126) for abutting against the ratchet resetting member (113), and a pawl restricting portion (127) for abutting against the pawl resetting member (114).

4. The lock body fixing structure of the self-priming tail door lock as recited in claim 3, wherein: the ratchet reset piece (113) comprises a first mounting part (113-1) sleeved on the ratchet fixing part (124), a first connecting part (113-2) with one end limited on the ratchet (111), and a first abutting part (113-3) with the other end abutting against the ratchet limiting part (126); the pawl resetting piece (114) comprises a second mounting part (114-1) sleeved on the pawl fixing part (125), a second connecting part (114-2) with one end limited on the pawl (112) and a second abutting part (114-3) with the other end abutting on the pawl limiting part (127).

5. The lock body fixing structure of the self-priming tail door lock as recited in claim 1, wherein: the lower shell (122) comprises a lower bottom wall (122-1) for installing the lock body mechanism (11) and a lower side wall (122-2) formed by extending two side ends of the lower bottom wall (122-1) upwards; the two lower side walls (122-2) form an opening part (122-3) at the front end of the lower bottom wall (122-1), and the lower bottom wall (122-1) is recessed inwards to form a lower V-shaped opening (122-1 a) at the position close to the opening part (122-3); the upper shell (121) comprises an upper top wall (121-1) covering the upper end of the lower bottom wall (122-1) and lapping on the two lower side walls (122-2), the upper top wall (121-1) is recessed inwards near the opening part (122-3) to form an upper V-shaped opening (121-1 a), and the lower V-shaped opening (122-1 a), the upper V-shaped opening (121-1 a) and the opening part (122-3) are matched to form the opening part (123); and the upper top wall (121-1) is positioned at two ends of the upper V-shaped opening (121-1 a) and extends downwards to form an extending wall (121-2) for closing the opening part (122-3).

6. The lock body fixing structure of the self-priming tail door lock as recited in claim 5, wherein: the top of the two lower side walls (122-2) is provided with a plurality of clamping grooves (122-2 a), and correspondingly, the upper top wall (121-1) is provided with a plurality of clamping convex parts (121-1 b) matched with the clamping grooves (122-2 a).

7. The lock body fixing structure of the self-priming tail door lock as recited in claim 1, wherein: one ends of the upper shell (121) and the lower shell (122) far away from the opening part (123) extend transversely to form an upper locking part (121-3) and a lower locking part (122-4) which are matched with each other.

8. The lock body fixing structure of the self-priming tail door lock as recited in claim 1, wherein: the self-priming tail door lock (1) further comprises an unlocking mechanism (13) for unlocking the lock body mechanism (11) and a locking mechanism (14) for driving the lock body mechanism (11) to be locked; a second housing (15) for mounting the unlocking mechanism (13) and the locking mechanism (14) is connected to one end of the housing away from the opening (123), and the inner cavity of the second housing (15) is communicated with the inner cavity of the first housing (12).

9. The lock body fixing structure of the self-priming tail door lock as recited in claim 8, wherein: the second shell (15) and the first shell (12) are arranged in an inclined way, and an obtuse angle is formed between the second shell and the first shell; one end of the lower shell (122) far away from the opening part (123) is bent upwards to form a coating part (122-5) coated on the second shell (15).

10. The lock body fixing structure of the self-priming tail door lock as recited in claim 2, wherein: a manual unlocking mechanism (16) for manually unlocking the lock body mechanism (11) is further arranged in the first shell (12), and the manual unlocking mechanism (16) comprises an unlocking driving rod (161) penetrating through the upper shell (121) and an unlocking reset piece (162) for resetting the unlocking driving rod (161); the part of the unlocking drive rod (161) in the shell is used for driving the pawl (112) to rotate to disengage from the ratchet wheel (111) for unlocking, and the part of the unlocking drive rod (161) extending out of the upper shell (121) is used for receiving external force; the unlocking reset piece (162) is installed on the part of the unlocking driving rod (161) extending out of the upper shell (121).