Safe extending device for fork arm of forklift

Abstract

The utility model relates to a safe extending device for a fork arm of a forklift, which comprises the following components: a fork arm, one end of which is connected with the forklift through a connecting arm, the other end of which is provided with a sliding groove, and two sides of the sliding groove are provided with a plurality of clamping grooves at intervals; the telescopic arm is arranged in the sliding groove in a sliding mode, a locking mechanism is arranged on the lower end face of one end of the telescopic arm and comprises a liftable lifting block and two symmetrically-arranged insertion blocks, a plurality of pressure springs are arranged between the two insertion blocks in a connected mode, an insertion plate protruding block is arranged at one end of each insertion block, a V-shaped groove is formed in the lifting block, and the insertion plate protruding blocks abut against the inclined face of the V-shaped groove; the lifting block ascends to enable the V-shaped groove to ascend so as to enable the two inserting blocks to get close to be away from the clamping groove; the pressure spring drives the two inserting blocks to move oppositely, the inserting blocks are inserted into the clamping grooves, and at the moment, the inserting plate protruding blocks abut against the V-shaped grooves to drive the lifting blocks to descend. The fork arm extending device is not prone to falling off in the carrying process, and the telescopic process is simple and efficient.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, specifically a safety extension device for forklift forks. Background Technology

[0002] Forklifts are wheeled handling vehicles used for loading, unloading, stacking, and short-distance transport of palletized goods. Existing forklifts, when handling excessively long goods, use a method of fitting appropriately sized square tubes onto the forks. This involves moving the longer tube under the goods, then raising the forks to lift the tube, thus quickly lifting the goods. This method is simple and fast, and is commonly used by workers in workshops. However, this method has a safety hazard: the square tube can easily fall off the fork arm. Furthermore, the tube needs to be removed from its storage location before use and then reattached to the fork arm, and after use, it needs to be removed and returned to its storage location, making the operation cumbersome and time-consuming. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to provide a fork arm extension device that is not easy to fall off during transportation and has a simple and efficient extension and retraction process.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A safety extension device for a forklift fork arm, comprising:

[0006] The fork arm has one end connected to the forklift via a connecting arm, and the other end has a sliding groove with multiple slots spaced apart on both sides of the sliding groove.

[0007] The telescopic arm is slidably disposed in the sliding groove. A locking mechanism is provided on the lower end face of one end. The locking mechanism includes a lifting block that can be raised and lowered and two symmetrically arranged insert blocks. Several compression springs are connected between the two insert blocks. One end of the insert block is provided with an insert plate protrusion. A V-shaped groove is opened on the lifting block. The insert plate protrusion abuts against the inclined surface of the V-shaped groove.

[0008] The lifting block rises, causing the V-groove to rise, which in turn brings the two insert blocks closer together, so that the insert blocks are away from the slot; the compression spring drives the two insert blocks to move in opposite directions, and the insert blocks are inserted into the slot. At this time, the insert plate protrusion presses against the V-groove to drive the lifting block to descend.

[0009] As one embodiment of the present utility model, the locking mechanism further includes a housing, and the housing has insertion holes on both sides corresponding to the two insertion blocks, and the insertion blocks are slidably disposed in the insertion holes;

[0010] The bottom of the housing has a lifting hole corresponding to the lifting block, and the lifting block slides within the lifting hole.

[0011] In one embodiment of this utility model, a protruding plate is provided on the lower side of one end of the insert block, and a protruding inclined surface is provided on the protruding plate protruding plate corresponding to the inclined surface of the V-shaped groove, and the protruding inclined surface abuts against the inclined surface of the V-shaped groove.

[0012] As one embodiment of this utility model, the telescopic arm includes a long telescopic arm body and a transition portion disposed on the lower end face of the telescopic arm body. The telescopic arm body is connected to the box through the transition portion, so that two symmetrical guide grooves are formed between the telescopic arm body and the box.

[0013] Two guide protrusions are provided on both sides of the sliding groove corresponding to the two guide grooves, and the telescopic arm is slidably mounted on the guide protrusions through the guide groove.

[0014] In one embodiment of this utility model, a locking threaded hole is provided on the fork arm that communicates with the sliding groove, for a locking screw to pass through and limit the movement. The locking screw abuts against the locking mechanism to limit the sliding stroke of the telescopic arm.

[0015] In one embodiment of this utility model, friction textures are provided on the lower end surface of the lifting block to increase the friction between the lifting block and the supporting plane.

[0016] In one embodiment of this utility model, the two ends of the slot are provided with chamfered structures to receive and guide the insertion of the insert plate protrusion.

[0017] The beneficial effects of adopting the above technical solution are as follows:

[0018] The telescopic boom of this application is slidably mounted within a sliding groove. The locking mechanism, consisting of a locking block and a locking slot, achieves the boom's locking function, preventing it from easily detaching and increasing safety during forklift handling. Furthermore, the locking mechanism is activated by raising and lowering a lifting block; simply bringing the forklift to contact the ground unlocks it. The boom can then be extended or retracted by moving the forklift. This operation is simple and reliable, saving time in handling the square tube and increasing the efficiency of forklift extension and retraction. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the upper part of the telescopic arm after it has been fully retracted in the embodiment.

[0020] Figure 2 This is a three-dimensional structural diagram of the bottom of the telescopic arm after it has been fully retracted in the embodiment.

[0021] Figure 3 This is a three-dimensional structural diagram of the upper part of the telescopic arm after it has been fully extended in the embodiment.

[0022] Figure 4 This is a three-dimensional structural diagram of the bottom of the telescopic arm after it has been fully extended in the embodiment.

[0023] Figure 5 This is a schematic diagram of the telescopic arm and locking mechanism after they are separated from the fork arm in the embodiment.

[0024] Figure 6 This is a schematic diagram of the telescopic arm and locking mechanism in the embodiment.

[0025] Figure 7 This is a schematic diagram of the internal structure of the locking mechanism in an embodiment.

[0026] Of which: 100 connecting arms;

[0027] 200 Fork arm; 201 Sliding groove; 202 Guide rib; 203 Slot; 204 Locking threaded hole;

[0028] 300 Telescopic boom; 301 Telescopic boom body; 302 Adapter;

[0029] 400 Locking mechanism; 401 Insert plate; 402 Insert plate protrusion; 403 V-groove; 404 Lifting block; 405 Friction texture; 406 Compression spring;

[0030] 500 guide groove. Detailed Implementation

[0031] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0032] like Figures 1 to 7 The forklift boom safety extension device shown includes:

[0033] The fork arm 200 has one end connected to the forklift via a connecting arm 100, and the other end is provided with a sliding groove 201. Two sets of slots 203 are provided on both sides of the sliding groove 201, which correspond to the position where the telescopic arm 300 extends the furthest and the position where it retracts the least, respectively.

[0034] The telescopic arm 300 is slidably disposed in the sliding groove 201. A locking mechanism 400 is provided on the lower end face of one end of the arm. The locking mechanism 400 includes a lifting block 404 that can be raised and lowered and two symmetrically arranged insert blocks 401. Three sets of compression springs 406 are connected between the two insert blocks 401. One end of the insert block 401 is provided with an insert plate protrusion 402. A V-shaped groove 403 is opened on the lifting block 404. The insert plate protrusion 402 and the inclined surface of the V-shaped groove 403 always abut against each other.

[0035] The lifting block 404 rises, causing the V-groove 403 to rise, which in turn causes the two insert blocks 401 to come together and move away from the slot; the compression spring 406 drives the two insert blocks 401 to move in opposite directions, and the insert blocks 401 are inserted into the slot 203. At this time, the insert plate protrusion 402 presses against the V-groove 403 to drive the lifting block 404 to descend.

[0036] In this embodiment, the downward movement of the drive fork arm against the ground causes the drive lifting block 404 to rise, unlocking the locking mechanism 400. Then, by driving the forklift to move towards or away from the telescopic arm 300, the telescopic arm 300 can be retracted or extended. The upward movement of the drive fork arm allows the two insert blocks 401 to be inserted into the slots 203 under the drive of the compression spring 406. The slots 203 have chamfered ends to receive and guide the insertion of the insert plate protrusions 402. In this embodiment, friction textures 405 are provided on the lower end surface of the lifting block 404 to increase the friction between the lifting block 404 and the supporting surface (such as the ground).

[0037] See Figure 7 The locking mechanism 400 also includes a housing. Insertion holes are provided on both sides of the housing corresponding to the two insertion blocks 401, and the insertion blocks 401 are slidably disposed within the insertion holes. A lifting hole is provided at the bottom of the housing corresponding to the lifting block 404, and the lifting block 404 is slidably disposed within the lifting hole. A protruding plate 402 is provided on the lower side of one end of each insertion block 401. A protruding inclined surface is provided on the protruding plate 402 corresponding to the inclined surface of the V-groove 403, and the protruding inclined surface abuts against the inclined surface of the V-groove 403. The telescopic arm 300 includes a long telescopic arm body 301 and a connecting portion 302 disposed on the lower end face of the telescopic arm body 301. The telescopic arm body 301 is connected to the housing through the connecting portion 302, forming two symmetrical guide grooves 500 between the telescopic arm body 301 and the housing. Two guide ribs 202 are provided on both sides of the sliding groove 201 corresponding to the two guide grooves 500. The telescopic arm 300 is slidably mounted on the guide ribs 202 through the guide grooves 500, which can limit the vertical movement of the telescopic arm 300 and guide its lateral movement. Specifically, when the fork arm 200 is lowered as a whole and the lifting block 404 is in contact with the ground, the guide ribs 202 apply a downward force to the housing, which can prevent the telescopic arm 300 from leaving the sliding groove 201; when the fork arm 200 is raised as a whole, the guide ribs 202 can apply an upward lifting force to the telescopic arm body 301.

[0038] See Figures 1 to 5The fork arm 200 is provided with a locking threaded hole 204 that is connected to the sliding groove 201 for a locking screw to pass through and limit the movement. The locking screw abuts against the locking mechanism 400 to limit the sliding stroke of the telescopic arm 300 and prevent the telescopic arm 300 from disengaging from the sliding groove 201.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety extension device for a fork truck fork arm, comprising: The utility model relates to a kind of fork arm and telescopic arm locking mechanism, which includes: Fork arm (200), one end is connected with forklift through connecting arm (100), the other end is provided with sliding groove (201), multiple clamping slots (203) are provided at the both sides of sliding groove (201) with interval; Telescopic arm (300), slidingly arranged in the sliding groove (201), the lower end surface of one end is provided with locking mechanism (400), the locking mechanism (400) includes liftable lifting block (404) and two symmetrically arranged insertion blocks (401), a plurality of compression springs (406) are connected and arranged between two insertion blocks (401), one end of insertion block (401) is provided with insertion plate protruding block (402), V-shaped groove (403) is opened in lifting block (404), the slope of insertion plate protruding block (402) and V-shaped groove (403) is abutted; The lifting block (404) is lifted to make the V-shaped groove (403) be lifted in turn to make two insertion blocks (401) close to each other to make the insertion block (401) away from the clamping slot;The compression spring (406) drives two insertion blocks (401) to move away from each other, the insertion block (401) is inserted into the clamping slot (203), at this time, the insertion plate protruding block (402) is tightly contacted with the V-shaped groove (403) to drive the lifting block (404) to descend.

2. The safety extension device for a fork of a fork truck according to claim 1, wherein The locking mechanism (400) further includes a box, the two sides of the box are provided with insertion block holes corresponding to the two insertion blocks (401), and the insertion blocks (401) are slidingly arranged in the insertion block holes. The bottom of the box is provided with a lifting hole corresponding to the lifting block (404), and the lifting block (404) slides in the lifting hole.

3. The safety extension device for a fork of a fork truck according to claim 1, wherein One end of the insertion block (401) is provided with an insertion plate protruding block (402) on the lower side, the insertion plate protruding block (402) is provided with a protruding block inclined surface corresponding to the inclined surface of the V-shaped groove (403), and the protruding block inclined surface is abutted with the inclined surface of the V-shaped groove (403).

4. The safety extension device for a fork of a fork truck according to claim 2, wherein The telescopic arm (300) includes a long telescopic arm body (301) and an adapter (302) arranged on the lower end surface of the telescopic arm body (301), the telescopic arm body (301) is connected with the box through the adapter (302), so that two symmetric guide grooves (500) are formed between the telescopic arm body (301) and the box. The two sides of the sliding groove (201) are provided with two guide protrusions (202) corresponding to the two guide grooves (500), and the telescopic arm (300) is slidingly arranged on the guide protrusions (202) through the guide grooves (500).

5. The safety extension device for a fork of a fork truck according to claim 4, wherein The fork arm (200) is provided with a locking screw hole (204) penetrating through the sliding groove (201), for locking by locking screw, and the locking screw is abutted with the locking mechanism (400) to limit the sliding stroke of the telescopic arm (300).

6. The safety extension device for a fork of a fork truck according to claim 1, wherein The lower end surface of the lifting block (404) is provided with a friction pattern (405) to increase the friction between the lifting block (404) and the supporting plane.

7. The safety extension device for a fork of a fork truck according to claim 1, wherein The two ends of the clamping slot (203) are provided with chamfer structures to accommodate and guide the insertion of the insertion plate protruding block (402).

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