A multi-position hand brake device for cold storage with an inductive switch

Abstract

The invention relates to the technical field of forklift hand brake technology, and specifically to a multi-gear hand brake device for cold storage with an inductive switch, comprising a multi-gear hand brake mechanism, the hand brake mechanism comprising a brake handle and a fixed bracket, and the brake handle and the fixed bracket are rotatably connected by a rotating pin shaft, and when the brake is tightened, the gear of the hand brake mechanism is adjusted; it also comprises a shifting inductive switch, the shifting inductive switch comprises a shifting mechanism and an inductive switch body; the shifting mechanism comprises a constraint shape plate and a shape plate, the constraint shape plate is fixedly mounted on the fixed bracket and is provided with a horizontal waist groove, the shape plate is fixedly mounted on the brake handle, and is provided with an arc groove corresponding to the waist groove, and the center of the circle corresponding to the arc groove is not in the extension direction of the rotating pin shaft; the inductive switch body comprises a fixed part and a movable part; the shifting mechanism can make the movable part and the fixed part approach or move away from each other, so as to realize the inductive effect of the inductive switch body or eliminate the inductive effect.

Description

Technical Field

[0001] The invention relates to the technical field of forklift hand brakes, and in particular to a multi-gear hand brake device for a cold storage with an inductive switch. Background Art

[0002] Electric forklifts have been widely used in cargo handling in cold storage environments. Due to the temperature difference between the cold storage and the outside world, condensed water will be generated during the alternating operation of the forklift in the cold storage and the outside world. This results in the existing multi-speed hand brake in the cold storage environment cannot use ordinary spring switches, and an inductive switch must be used. However, the sensing distance of the inductive switch is 5mm. The inductive switch cannot achieve synchronous control of the light on or off as the hand brake shifts, which limits the application of the inductive switch in the multi-speed hand brake; therefore, the hand brake used in the cold storage environment needs to use a hand brake device without gear change, such as Fig. 9 As shown, the hand brake with inductive switch without gear change can only achieve the inductive effect when the inductive switch is in a specific position;

[0003] Therefore, it is currently necessary to develop a multi-speed hand brake device for cold storage with an inductive switch, which can not only be used in a cold storage environment, but also ensure the comfort and safety of the driver's operation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a multi-gear hand brake device for cold storage with an inductive switch, which overcomes the shortcomings of the background technology and realizes synchronous control of the sensing position of the inductive switch as the gear position of the hand brake changes. The specific technical solution is as follows:

[0005] A multi-position hand brake device for cold storage with an inductive switch, comprising a multi-position hand brake mechanism, the hand brake mechanism comprising a brake handle 1 and a fixed bracket 2, and the brake handle 1 and the fixed bracket 2 are rotatably connected by a rotating pin 3, comprising a shifting inductive switch, and the shifting inductive switch comprises a shifting mechanism and an inductive switch body;

[0006] The displacement mechanism includes a constraint shape plate 41 and a shape plate 42. The constraint shape plate 41 is fixedly mounted on the fixed bracket 2 and has a horizontal waist-shaped groove 411. The shape plate 42 is fixedly mounted on the brake handle 1 and has an arc groove 421 corresponding to the waist-shaped groove 411. The center z of the arc groove 421 is not on the axis x of the rotating pin 3.

[0007] The induction switch body includes a fixed member 51 and a movable member 52. The fixed member 51 is fixedly mounted on the constraint plate 41 and is located in the length extension direction of the waist-shaped groove 411. The movable member 52 is fixedly mounted on the movable pin 6, and the movable pin 6 is inserted in the waist-shaped groove 411 and the arc groove 421.

[0008] When the brake handle 1 is pulled, that is, the range plate 42 rotates around the rotating pin 3, the movable pin 6 moves along the arc groove 421. At the same time, the constraint plate 41 limits the movement of the movable pin 6 to along the waist groove 411, so that the movable part 52 and the stationary part 51 are close to or away from each other, thereby realizing the inductive effect of the inductive switch body or the elimination of the inductive effect.

[0009] Furthermore, the constraint travel plate 41 is a horizontal first L-shaped plate, and the short side of the first L-shaped plate is fixedly mounted on the end panel 21 of the fixed bracket 2, so that the long side of the first L-shaped plate corresponds to the side plate of the fixed bracket 2, and is consistent with the lateral extension direction of the corresponding side plate; a horizontal waist-shaped groove is opened at the overhanging end of the long side of the first L-shaped plate, and a fixed part 51 is fixedly mounted at the other end, and the fixed part 51 is located in the length extension direction of the waist-shaped groove 411.

[0010] Furthermore, the travel plate 42 is a horizontal second L-shaped plate, and the short side of the second L-shaped plate is vertically fixedly connected to the lower part of the brake handle 1, so that the long side of the second L-shaped plate is located between the constraint travel plate 41 and the corresponding side plate of the fixed bracket 2, and an arc groove 421 is opened on the long side of the second L-shaped plate corresponding to the waist-shaped groove 411.

[0011] Furthermore, the arc groove 421 corresponds to the center z, the initial position point a of the movable pin 6 on the waist groove 411, the end position point c, and point c corresponds to point c1 of the arc groove 421; a circle is drawn with z as the center and az as the radius, and the diameters az and c1z divide the circle into four sectors, and the axis line x of the rotating shaft 3 is located in the corresponding area of ​​the upper right sector of the circle, so that when the brake handle 1 shifts clockwise, the distance from the position point of the movable pin 6 on the arc groove 421 to the axis line x gradually increases, and at the same time, the movable pin 6 slides in the waist groove 411 to bring the movable part 52 and the fixed part 51 closer, thereby realizing the induction effect of the induction switch body.

[0012] Furthermore, a positioning notch 22 is provided at the upper end of the side plate of the fixing bracket 2 corresponding to the short side of the second L-shaped plate. When the notch 22 and the short side of the second L-shaped plate are correspondingly engaged, the positioning notch 22 is used to limit the end position of the brake handle 1 when shifting gears.

[0013] Furthermore, the moving member 52 is fixedly sleeved on the moving pin 6, and a locking nut is provided at the corresponding end of the moving pin 6;

[0014] The movable pin 6 is inserted in the arc groove 412 and the waist groove 411 , and a horizontal limiting surface 61 is provided in the axial direction of the movable pin 6 corresponding to the waist groove 411 to prevent the movable pin 6 from rotating when moving along the waist groove 411 .

[0015] Furthermore, the radially corresponding arc groove 412 and waist groove 411 of the movable pin shaft 6 are respectively provided with clamp grooves 62 , and a clamp 63 is mounted on each clamp groove 62 to limit the axial movement of the movable pin shaft 6 .

[0016] The beneficial technical effects of the present invention are as follows:

[0017] The present invention discloses a multi-speed hand brake device for cold storage with an inductive switch. When the hand brake mechanism shifts gears, the brake handle rotates around the rotating pin shaft, driving the profile plate to move. At the same time, the profile plate is provided with an arc groove, and a waist groove is provided on the constraint profile plate corresponding to the arc groove, and the movable pin shaft is inserted in the arc groove and the waist groove. Since the center z corresponding to the arc groove is not in the extension direction of the rotating pin shaft, when the arc groove moves around the rotating pin shaft, the movable pin shaft moves along the slotting direction of the arc groove, but the movable pin shaft is inserted in the waist groove at the same time, and the waist groove limits the movable pin shaft to move along the slotting direction of the waist groove, that is, to move in the horizontal direction, so as to realize the approach and separation of the movable part and the stationary part. When the distance between the movable part and the stationary part is less than 5mm, the inductive switch body realizes the inductive effect. Therefore, the present invention realizes the inductive effect of synchronously controlling the inductive switch body when the hand brake mechanism shifts gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] Figure 2 It is an exploded view of the structure of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the brake handle of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the fixing bracket of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the movable pin of the present invention.

[0023] Figure 6 This is a diagram of the movement position of the hand brake mechanism of the present invention when shifting gears.

[0024] Figure 7 It is a principle diagram of the motion trajectory of the mobile pin shaft of the present invention.

[0025] Figure 8 This is a schematic diagram of the design of the center point z corresponding to the arc groove of the present invention.

[0026] Fig. 9 The utility model relates to a hand brake with an inductive switch and without gear shifting for a cold storage in the prior art.

[0027] Among them: 1-brake handle; 2-fixed bracket; 21-end panel; 22-positioning notch; 3-rotating pin; 41-constraint shape plate; 411-waist groove; 42-shape plate; 421-arc groove; 51-stationary part; 52-moving part; 6-movable pin; 61-limiting surface; 62-clamp groove; 63-clamp; 71-ratchet clamp; 72-ratchet plate. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] A multi-gear hand brake device for a cold storage with an inductive switch includes a multi-gear hand brake mechanism, the hand brake mechanism includes a brake handle 1 and a fixed bracket 2, and the brake handle 1 and the fixed bracket 2 are rotatably connected by a rotating pin 3. When the brake is tightened, a ratchet card 71 is installed on a positioning hole of the brake handle 1. During the pulling process of the brake handle 1, each intermediate gear is defined by the contact between the ratchet card 71 and each tooth on the ratchet plate 72, thereby realizing the adjustment of the gear position of the hand brake mechanism.

[0030] It includes a shift-type inductive switch, which includes a shift mechanism and an inductive switch body;

[0031] The displacement mechanism includes a constraint shape plate 41 and a shape plate 42. The constraint shape plate 41 is fixedly mounted on the fixed bracket 2 and has a horizontal waist-shaped groove 411. The shape plate 42 is fixedly mounted on the brake handle 1 and has an arc groove 421 corresponding to the waist-shaped groove 411. The center z of the arc groove 421 is not on the axis of the rotating pin 3.

[0032] The induction switch body includes a fixed member 51 and a movable member 52. The fixed member 51 is fixedly mounted on the constraint plate 41 and is located in the length extension direction of the waist-shaped groove 411. The movable member 52 is fixedly mounted on the movable pin 6, and the movable pin 6 is inserted in the waist-shaped groove 411 and the arc groove 421.

[0033] The constraint travel plate 41 is a horizontal first L-shaped plate, and the short side of the first L-shaped plate is fixedly mounted on the end panel 21 of the fixed bracket 2, so that the long side of the first L-shaped plate corresponds to the side plate of the fixed bracket 2, and is consistent with the lateral extension direction of the corresponding side plate; a horizontal waist-shaped groove is opened at one end of the long side of the first L-shaped plate, and a fixed part 51 is fixedly mounted at the other end, and the fixed part 51 is located in the length extension direction of the waist-shaped groove 411.

[0034] The travel plate 42 is a horizontal second L-shaped plate, the short side of the second L-shaped plate is vertically fixedly connected to the lower part of the brake handle 1, so that the long side of the second L-shaped plate is located between the constraint travel plate 41 and the corresponding side plate of the fixed bracket 2, and an arc groove 421 is opened on the long side of the second L-shaped plate corresponding to the waist-shaped groove 411.

[0035] The arc groove 421 corresponds to the center z, the initial position point a of the movable pin shaft 6 on the waist groove 411, the end position point c, and point c corresponds to point c1 of the arc groove 421; a circle is drawn with z as the center and az as the radius, and the diameters az and c1z divide the circle into four sectors, and the axis line x of the rotating shaft 3 is located in the corresponding area of ​​the sector in the upper right corner of the circle, so that when the brake handle 1 shifts gears clockwise, the distance from the position point of the movable pin shaft 6 on the arc groove 421 to the axis line x gradually increases, and at the same time, the movable pin shaft 6 slides in the waist groove 411 to bring the movable part 52 and the fixed part 51 closer, thereby realizing the induction effect of the induction switch body.

[0036] A positioning notch 22 is provided at the upper end of the side plate of the fixing bracket 2 corresponding to the short side of the second L-shaped plate. When the notch 22 is correspondingly engaged with the short side of the second L-shaped plate, the positioning notch 22 is used to limit the end position of the brake handle 1 when shifting gears.

[0037] The moving member 52 is fixedly sleeved on the moving pin 6, and a locking nut is provided at the corresponding end of the moving pin 6;

[0038] The movable pin 6 is inserted in the arc groove 412 and the waist groove 411 , and a horizontal limiting surface 61 is provided in the axial direction of the movable pin 6 corresponding to the waist groove 411 to prevent the movable pin 6 from rotating when moving along the waist groove 411 .

[0039] The radially corresponding arc groove 412 and waist groove 411 of the movable pin shaft 6 are respectively provided with clamp grooves 62 , and a clamp 63 is mounted on each clamp groove 62 to limit the axial movement of the movable pin shaft 6 .

[0040] When the shift mechanism is working, when the brake handle 1 shifts gears clockwise, that is, when the shape plate 42 rotates around the rotating pin shaft 3, the shape plate 41 is constrained to limit the movement of the movable pin shaft 6 to the direction of the waist groove 411; the position point corresponding to the axis of the movable pin shaft 6 on the arc groove 421 changes accordingly, and the distance from the changed position point to the axis line x of the rotating shaft 3 gradually increases, and at the same time, the position point corresponding to the axis of the movable pin shaft 6 on the waist groove 411 also changes accordingly, and the distance from the changed position point to the axis line x of the rotating shaft 3 gradually increases; the axis of the movable pin shaft 6 corresponds to the arc groove 421 and the waist groove 411, and the increase in distance relative to the axis line x is equal, so that when the brake handle 1 shifts gears clockwise, the movable part 52 and the fixed part 51 are close to each other, realizing the inductive effect of the inductive switch body. Similarly, when the brake handle 1 is pulled counterclockwise, the movable part 52 and the fixed part 51 are separated, realizing the elimination of the inductive effect of the inductive switch body.

[0041] The movement principle of the movable pin 6 is as follows Figure 7 , Figure 8 As shown: the horizontal waist-shaped groove 411 is on the constraint stroke plate 41, and the constraint stroke plate 41 is welded to the end panel 21 of the fixed bracket 2, so the waist-shaped groove 411 is a fixed groove; the arc groove 421 is opened on the stroke plate 42, and the stroke plate 42 is welded to the brake handle 1, so the groove of the arc groove 421 will follow the brake handle 1 to change the angle around the rotating pin 3.

[0042] The movable pin shaft 6 is provided with a radial clamp groove 62 , and the movable pin shaft 6 is fixed between the waist-shaped groove 411 and the arc-shaped groove 421 by the clamp 63 , so that the movable pin shaft 6 will not move axially.

[0043] The movable pin shaft 6 is provided with a limiting surface 61 corresponding to the waist-shaped groove 411 , so that the movable pin shaft 6 will not rotate and can only perform translational movement on the waist-shaped groove 411 .

[0044] The movable pin 6 is inserted into the arc groove 421 and the waist groove 411, and the center point of the movable pin 6 corresponds to the initial position in the waist groove 411 at point a (such as Figure 6 When the brake handle 1 is tightened at position 1), the distance between point a and the axis x of the rotating pin 3 is ax, and the arc groove 421 will rotate around the rotating axis 3 with the brake handle 1. When the arc groove 421 rotates to position b1, the position of the center point of the moving pin 6 in the waist groove 411 is at point b (such as Figure 6 When the brake handle 1 is tightened in position 2), the distance from x is b1x which should be equal to bx. When the arc groove 421 rotates to the c1 position, the center point of the movable pin 6 corresponds to the position in the waist groove 411 at point c (such as Figure 6 When the brake handle 1 is tightened in position 3), the distance from x is c1x should be equal to cx.

[0045] To make the movable pin 6 move, it should be satisfied that the center z of the circle corresponding to the arc groove 421 is not on the axis x of the rotating pin 3. If z falls on the axis x, the distance from each point on the arc groove 421 to x will not change;

[0046] At the same time, the design of point z should ensure that, for the circle formed by drawing a circle with point z as the center and distance az as the radius, the axis line x of the rotating pin 3 should be in the right half of the circle cut by az and its extension line. If it is not in this part, during the tightening process of the brake handle 1, the movement of the rotating pin 3 with the movable part 52 along the waist groove 411 will not move forward to approach the fixed part 51 but move away; at the same time, the axis line x of the rotating pin 3 should be in the upper half of the circle cut by c1z and its extension line. If it is not in this part, during the tightening process of the brake handle 1, the movement of the rotating pin 3 with the movable part 52 along the waist groove 411 will show an uncertain movement of first approaching and then moving away. Therefore, the center line x of the rotating pin 3 should fall on Figure 8 The basic movement requirements of this mechanism can only be met within the shaded area.

[0047] If the moving member 52 is to have a large initial moving distance and a small subsequent moving distance along the waist groove 411, the value of b1x (bx) must change greatly relative to ax, while the value of c1x (cx) must change relatively little relative to b1x. Then, the specific positions of points z and x must be set according to the travel requirements of the moving pin 6.

[0048] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-position hand brake device for a cold storage with an inductive switch, comprising a multi-position hand brake mechanism, the hand brake mechanism comprising a brake handle (1) and a fixed bracket (2), and the brake handle (1) and the fixed bracket (2) are rotatably connected via a rotating pin (3). Features: It includes a shift-type inductive switch, which includes a shift mechanism and an inductive switch body; The displacement mechanism comprises a constraining shape plate (41) and a shape plate (42), wherein the constraining shape plate (41) is fixedly mounted on the fixed bracket (2) and is provided with a horizontal waist-shaped groove (411), and the shape plate (42) is fixedly mounted on the brake handle (1) and is provided with an arc-shaped groove (421) corresponding to the waist-shaped groove (411), and the center z of the arc-shaped groove (421) is not on the axis x of the rotating pin shaft (3); The induction switch body comprises a stationary member (51) and a moving member (52); the stationary member (51) is fixedly mounted on the constraint profile plate (41) and is located in the length extension direction of the waist-shaped groove (411); the moving member (52) is fixedly mounted on a movable pin shaft (6), and the movable pin shaft (6) is inserted into the waist-shaped groove (411) and the arc-shaped groove (421); The constraint plate (41) is a horizontal first L-shaped plate, the short side of the first L-shaped plate being fixedly mounted on the end panel (21) of the fixed bracket (2), so that the long side of the first L-shaped plate corresponds to the side plate of the fixed bracket (2) and is consistent with the lateral extension direction of the corresponding side plate; a horizontal waist-shaped groove (411) is provided at the overhanging end of the long side of the first L-shaped plate, and a fixed member (51) is fixedly mounted at the other end, and the fixed member (51) is located in the length extension direction of the waist-shaped groove (411); The travel plate (42) is a horizontal second L-shaped plate, the short side of the second L-shaped plate is vertically fixedly connected to the lower part of the brake handle (1), so that the long side of the second L-shaped plate is located between the constraint travel plate (41) and the corresponding side plate of the fixed bracket (2), and the long side of the second L-shaped plate is provided with an arc groove (421) corresponding to the waist groove (411); The arc groove (421) corresponds to a circle center z, and the initial position point a of the movable pin shaft (6) on the waist groove (411) is the initial position point a, and the terminal position point c is the terminal position point c, and the terminal position point c corresponds to the terminal position point c1 of the arc groove (421); a circle is drawn with z as the center and az as the radius, and the diameters az and c1z divide the circle into four sectors, and the axis line x of the rotating pin shaft (3) is located in the corresponding area of ​​the upper right corner sector of the circle, so that when the brake handle (1) is shifted clockwise, the distance from the position point of the movable pin shaft (6) on the arc groove (421) to the axis line x gradually increases, and at the same time, the movable pin shaft (6) slides in the waist groove (411) so that the movable part (52) and the fixed part (51) are close to each other, thereby realizing the induction effect of the induction switch body; When the brake handle (1) is pulled, i.e. the travel plate (42) rotates around the rotating pin (3), the movable pin (6) moves along the arc groove (421), and at the same time, the travel plate (41) is constrained to limit the movement of the movable pin (6) to the direction along the waist groove (411), so that the movable member (52) and the fixed member (51) are moved closer or farther away, thereby realizing the inductive effect of the inductive switch body or eliminating the inductive effect.

2. According to claim 1, a multi-position hand brake device for cold storage with an inductive switch, characterized in that: A positioning notch (22) is provided at the upper end of the side plate of the fixing bracket (2) corresponding to the short side of the second L-shaped plate. When the notch (22) and the short side of the second L-shaped plate are correspondingly engaged, the positioning notch is used to limit the end position of the brake handle (1) when shifting gears.

3. According to claim 1, a multi-position hand brake device for cold storage with an inductive switch, characterized in that: The moving member (52) is fixedly sleeved on the moving pin shaft (6), and a locking nut is provided at the corresponding end of the moving pin shaft (6); The movable pin shaft (6) is inserted into the arc-shaped groove (412) and the waist-shaped groove (411), and a horizontal limiting surface (61) is provided in the axial direction of the movable pin shaft (6) corresponding to the waist-shaped groove (411) to prevent the movable pin shaft (6) from rotating when sliding along the waist-shaped groove (411).

4. According to claim 3, a multi-position hand brake device for cold storage with an inductive switch, characterized in that: The movable pin shaft (6) is provided with clamp grooves (62) in the radial direction corresponding to the arc groove (412) and the waist groove (411), and each clamp groove (62) is matched with a clamp (63) for limiting the axial movement of the movable pin shaft (6).

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