Mechanical handle structure

Abstract

The utility model provides a mechanical handle structure. The mechanical handle structure comprises an operating rod, a shell, a rotating shaft, a clamping structure, a centering rotating plate, a rolling shaft fixing base, a rolling shaft and a supporting base, wherein the rotating shaft, the clamping structure, the centering rotating plate, the rolling shaft fixing base, the rolling shaft and the supporting base are installed in the shell. Two rolling shaft fixing seats are symmetrically mounted below the centering rotating plate, and a rolling shaft is mounted in each rolling shaft fixing seat; the centering rotating plate is provided with two grooves which are respectively matched with the two rolling shafts; and in the centering process, the two rolling shafts extend out of the rolling shaft fixing base and enter the two grooves of the centering rotating plate, and the technical problem that in the prior art, a single-point limiting operation rod shakes up and down and left and right is solved. In addition, the sealing mode between the operating rod and the shell, a clamping structure and the structure of the operating rod are improved, and the technical problems that in the prior art, a protection structure is prone to being damaged, so that electronic elements are damaged, clamping sleeve installation and an adjusting screw contradict each other, the operating rod is prone to being stepped by mistake to be bent, and the product quality is affected by circuit board bonding glue are further solved.

Description

Technical Field

[0001] This utility model relates to the field of handle technology, and more specifically, to a mechanical handle structure. Background Technology

[0002] A mechanical handle is an input device combining mechanical structure and electronic components, frequently used in industrial operations, such as controlling the rotation of a mixer truck tank. A mechanical handle includes a mechanical structure, a rotating shaft, a clamping structure, and a centering plate, while the electronic components include sensors and circuit boards. The operating lever typically has three positions: left, center, and right. When used with a mixer truck, these positions correspond to forward rotation, stop, and reverse rotation of the tank, respectively. Rotating the operating lever shifts positions, driving the rotating shaft connected to one end of the lever. The clamping structure provides resistance to the rotation of the shaft. The rotating shaft drives the fixed centering plate, which triggers sensors to send forward, stop, and reverse signals to the central control panel.

[0003] Application number 202322002269.0, patent title: A utility model patent for a shockproof centering operating lever (comparative patent), provides a mechanical handle. This patent and other existing technologies have the following technical features and the following technical problems: (The drawings mentioned in this paragraph refer to the drawings in the comparative patent) 1. As attached Figure 3 As shown, the centering positioning mechanism is equipped with a retractable roller, and a groove is provided at the corresponding position of the roller. When the operating lever is adjusted to the center position, the roller in the centering positioning mechanism enters the groove. The roller and groove are designed to ensure the accuracy of the center position. However, due to manufacturing errors of the roller or groove, and long-term and frequent use of the operating lever, gaps may appear in the fit between the roller and the groove. This causes the operating lever to wobble up and down and left and right when it is turned to the center position, resulting in poor reliability and even sending incorrect signals to the central control console. 2. As attached Figure 1 As shown, a bellows sleeve is installed between the operating lever and the housing to prevent dust, water, and other substances from entering the housing. For example, in a concrete mixer truck, which is frequently cleaned with a high-pressure water gun, the bellows sleeve on the mechanical handle is made of a soft material and is easily damaged, allowing water and dust to enter the housing and damage electronic components. 3. As shown in the attached... Figure 2 As shown, a pair of symmetrical clamps are arranged on both sides of the rotating shaft. The clamps are installed on the mounting base by screw one. The rotating shaft is located between the two clamps. Screw two, perpendicular to the axis of the rotating shaft, is installed on each of the two clamps to adjust the distance between the two clamps and clamp the rotating shaft. Screw one and screw two are perpendicular. In actual use, the installation of screw one and screw two is contradictory. Screw one is used to securely install the clamps, while screw two provides a shearing force to screw one. This contradictory structure makes it difficult to adjust the damping force between the rotating shaft and the clamps. 4. As... Figure 1 As shown, number 1 is the operating lever. Sometimes, workers may accidentally step on the operating lever, causing it to bend. 5. The clamp installation requires a mounting base (clamp mounting base), and the centering positioning mechanism installation also requires a mounting base (centering positioning mechanism mounting base). The circuit board is generally installed between the clamp mounting base and the centering positioning mounting base by adhesive bonding, which causes glue to enter the housing and affect product quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the technical problems of existing mechanical handles, such as wobbling in the middle, easy damage to the protective structure leading to damage to electronic components, contradiction between the installation of the clip and the adjusting screw, easy bending of the operating rod by accidental stepping, and the impact of the adhesive on the circuit board on product quality. The present invention provides a mechanical handle structure that can solve the above technical problems.

[0005] A mechanical handle structure includes an operating lever, a housing, and a rotating shaft, a clamping structure, a centering rotating plate, roller fixing seats, rollers, and a support seat all mounted in the housing. The centering rotating plate and the roller fixing seats are both mounted on the support seat. Two roller fixing seats are symmetrically mounted below the centering rotating plate, each housing a roller. The centering rotating plate has two grooves that respectively mate with the two rollers. When the operating lever drives the rotating shaft to rotate left and right, the rollers are compressed. During centering, the two rollers extend from the roller fixing seats and enter the two grooves of the centering rotating plate.

[0006] Existing technology uses a single roller. When there are machining errors or wear between the roller and the groove, a gap can form, causing the operating lever to wobble when in the center position. This results in poor reliability and may even send incorrect signals to the central control panel. This invention uses two rollers, providing two-point limiting that is more stable and reliable than the single-point limiting of existing technology, effectively solving the problem of the operating lever wobbling up, down, left, and right when using single-point limiting. The "return to center" mentioned in this application refers to the state when the operating lever is in the center position and the roller is located in the groove of the return-to-center rotating plate.

[0007] The operating lever is connected to the rotating shaft, which drives the rotating shaft to rotate. A clamp and a centering rotating plate are fixed on the rotating shaft in sequence, and then pass through the support base. The roller fixing base is installed on the support base and located below the centering rotating plate. The centering rotating plate has a groove that matches the size of the roller. The roller is movably installed on the roller fixing base. When the centering rotating plate is rotated to the left or right, the roller is compressed. When returning to center, the roller extends and enters the groove on the centering rotating plate. The clamping structure clamps the rotating shaft and provides damping force, and the rotating shaft drives the centering rotating plate to rotate.

[0008] Furthermore, one end of the roller fixing seat is fixed to the support seat, and the other end of the roller fixing seat has a hole in which a spring, a roller, and a spring stop are sequentially arranged. When the centering rotating plate rotates to the left and right, the roller compresses the spring and enters the hole. When centering, the spring extends and pushes the roller into the groove of the centering rotating plate. The spring stop is installed at the outlet of the hole in the roller fixing seat to limit the spring and prevent it from extending out of the hole.

[0009] Furthermore, the operating lever passes through the housing and connects to the rotating shaft, and a sealing ring is installed between the operating lever and the housing. Preferably, the sealing ring is a skeleton oil seal with fluorinated O-ring. Compared with the prior art using a bellows sleeve, this avoids the problem of water ingress caused by damage to the bellows sleeve.

[0010] Furthermore, the housing includes housing one and housing two. The mechanical structure of the mechanical handle is located in housing one, and the circuit board of the electronic components is located in housing two. Housing one and housing two are joined together. The circuit board is glued into housing two. Gluing the circuit board into housing two serves two purposes: firstly, it provides waterproofing and dustproofing; secondly, by encapsulating the circuit board in housing two, no glue will fall into the housing and affect product quality.

[0011] Furthermore, the outer peripheral surface of the first housing has a protrusion, and the second housing is bonded or fixed to the protrusion.

[0012] Furthermore, the clamping structure includes a sleeve and a fastener. The sleeve is U-shaped, comprising two sides and a bottom surface. The U-shaped sleeve is fitted onto the rotating shaft, and the fastener passes through the two sides to clamp the rotating shaft.

[0013] In existing technology, a pair of symmetrical clamps are arranged on both sides of a rotating shaft. The clamps are installed on a clamp mounting base by screws, with the rotating shaft located between the two clamps. Screws, perpendicular to the rotating shaft, are installed on each clamp to adjust the distance between the two clamps and clamp the rotating shaft. Screws are perpendicular to each other. In practice, the installation of screws is contradictory: screw one secures the clamp, while screw two provides a shearing force to screw one. This contradictory structure makes it difficult to adjust the damping force between the rotating shaft and the clamps. The U-shaped clamp of this invention does not require a dedicated mounting base; it only requires fasteners in one direction to tighten the two sides of the U-shaped clamp, eliminating the contradictory installation.

[0014] Furthermore, the clamping structure also includes a second spring. The fasteners include a screw and a nut. The screw passes through both sides of the U-shaped sleeve, and the other end is tightened with a nut. The second spring is located at one end of the screw. By tightening the nut, the compression of the second spring is adjusted, giving the spring a preload. With prolonged use, the sleeve may loosen. Tightening the nut provides the second spring with a certain preload. When the sleeve loosens, the preload of the second spring compensates for the loosening, increasing the compensating damping force due to the increased spring wire diameter. The second spring can be located at either end of the screw, either between the screw head and the sleeve, or between the nut and the sleeve.

[0015] Furthermore, the clamping structure also includes a limiting plate, the two ends of which are fixed to the housing. The screw passes through the limiting plate, and the limiting plate is located between the second spring and the clamping sleeve. The limiting plate is used for the installation and positioning of the screw and the spring.

[0016] Furthermore, the operating lever adopts a bendable structure.

[0017] Furthermore, the operating lever includes a swing arm and an outer rod connected in sequence. The swing arm is connected to the rotation shaft, and the outer rod is bendable relative to the swing arm. Preferably, the outer rod is locked and fixed to the swing arm with grommets. More preferably, the outer rod can be bent 90°. When a foot is placed on the outer rod, it can be folded 90°, thereby effectively preventing the operating lever from being bent by being stepped on.

[0018] Furthermore, the housing is made of aluminum alloy.

[0019] This utility model has the following beneficial effects:

[0020] 1. Two roller fixing seats are symmetrically arranged below the centering rotating plate. Two grooves adapted to the rollers are opened on the centering rotating plate. The two-point limiting is more stable and reliable than the single-point limiting of the existing technology, and effectively solves the technical problem of the operating rod swaying up, down and left and right in the single-point limiting technology.

[0021] 2. The operating lever passes through the housing and connects to the rotating shaft. The connection point is sealed with an oil seal and an O-ring. The housing is made of aluminum alloy, which effectively prevents dust and water from entering. This solves the technical problem of existing protective structures being easily damaged, leading to damage to electronic components.

[0022] 3. The rotating shaft only passes through the support and housing at its end. Existing technologies require it to first pass through the clamping mounting base, then through the support and housing. This application eliminates the need for an additional mounting base; a limiting plate is placed parallel to the side of the clamping shaft, and the rotating shaft does not pass through it, resulting in a simpler structure. The U-shaped clamping shaft is clamped onto the rotating shaft, and the two sides of the clamping shaft are tightened with screws and nuts, resolving the technical problem of conflicting clamping installation and adjusting screws in existing technologies. Furthermore, a second spring is incorporated to automatically compensate for the clamping force of the clamping shaft; this application features an automatic compensation function.

[0023] 4. The operating lever adopts a 90° bendable structure, which solves the technical problem of the operating lever bending due to accidental stepping in the prior art.

[0024] 5. The housing includes housing one and housing two. The mechanical structure of the mechanical handle is housed in housing one, and the circuit board of the electronic components is housed in housing two. The circuit board is placed separately from other structures and is glued into housing two. This solves the technical problem of existing circuit board adhesive affecting product quality. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0026] Figure 1 This is a top view of the mechanical handle structure.

[0027] Figure 2 This is a sectional view (front view) of the mechanical handle structure;

[0028] Figure 3 This is a diagram showing the fit between the rotating shaft and clamping structure of the mechanical handle.

[0029] The serial numbers are as follows: 1a-swing rod, 1b-outer rod, 1d-machine screw, 2-rotating shaft, 3-housing, 3a-housing one, 3b-housing two, 3c-protrusion, 4-clamping structure, 4a-clamp, 4b-spring two, 4c-screw, 4d-nut, 4e-limiting plate, 5-returning rotating plate, 6-roller fixing seat, 6a-spring one, 6b-spring stop, 7-roller, 8-support seat, 9-circuit board. Detailed Implementation

[0030] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0031] Example 1

[0032] This embodiment provides a mechanical handle structure for controlling the rotation of the mixing truck tank, specifically the rotation of the X-axis single-shaft mixing truck tank. For example... Figure 1 As shown, the system includes an operating lever, a housing 3, and a rotating shaft 2, a clamping structure 4, a centering rotating plate 5, a roller fixing seat 6, a roller 7, and a support seat 8, all mounted within the housing 3. The operating lever is connected to the rotating shaft 2, causing it to rotate. The clamping structure 4 and the centering rotating plate 5 are sequentially fixed to the rotating shaft 2, which then passes through the support seat 8 and the housing 3. The clamping structure 4 clamps the rotating shaft 2, providing damping force, which in turn causes the centering rotating plate 5 to rotate. Both the centering rotating plate 5 and the roller fixing seat 6 are mounted on the support seat 8. Figure 2 As shown, two roller fixing seats 6 are symmetrically installed below the centering rotating plate 5, and each roller fixing seat 6 is equipped with a roller 7. The centering rotating plate 5 has two grooves that are adapted to the two rollers 7 respectively. When the operating lever drives the rotating shaft 2 to rotate to the left and right, the rollers 7 are compressed. When centering, the two rollers 7 extend from the roller fixing seats 6 and enter the two grooves of the centering rotating plate 5.

[0033] like Figure 2 As shown, one end of the roller fixing seat 6 is fixed to the support seat 8, and the other end of the roller fixing seat 6 has a hole in which a spring 6a, a roller 7, and a spring stop 6b are sequentially arranged. When the centering rotating plate 5 rotates to the left and right, the roller 7 compresses the spring 6a and enters the hole; when centering, the spring 6a extends and pushes the roller 7 into the groove of the centering rotating plate 5. The spring stop 6b is installed at the outlet of the hole in the roller fixing seat 6 to limit the spring 6a and prevent it from extending out of the hole.

[0034] like Figure 1 As shown, the housing 3 includes housing 3a and housing 3b. The mechanical structure of the mechanical handle is located in housing 3a, and the circuit board 9 of the electronic components is located in housing 3b. Housing 3a and housing 3b are joined together; the circuit board 9 is glued into housing 3b. Figure 2 or Figure 3 In this structure, the outer peripheral surface of the first housing 3a has a protrusion 3c, and the second housing 3b is bonded or fixed to the protrusion 3c. When bonding is used, the bonding surface is on the protrusion 3c, and the glue is less likely to fall into the housing 3 and affect other components. The second housing 3b also has a T-shaped groove, and the limiting plate 4e is installed on the larger groove of the T-shaped groove by fasteners.

[0035] The operating lever adopts a bendable structure. The operating lever includes a swing rod 1a and an outer rod 1b connected in sequence. The swing rod 1a is connected to the rotating shaft 2. The outer rod 1b is bendable relative to the swing rod 1a. The outer rod 1b is locked and fixed to the swing rod 1a with a nut screw 1d. The outer rod 1b can be bent by 90°, thereby effectively avoiding the problem of the operating lever bending due to accidental stepping.

[0036] Example 2

[0037] This embodiment provides a mechanical handle structure. Based on the mechanical handle structure described in Embodiment 1, a sealing ring is installed between the operating rod and the housing 3, such as... Figure 1 As shown, the operating rod passes through the housing 3 and connects to the rotating shaft 2. A sealing ring is installed between the operating rod and the housing 3. The sealing ring is a skeleton oil seal with fluorinated O-ring. The housing 3 is made of aluminum alloy. The sealing ring between the operating rod and the housing 3, and the fact that the housing 3 is made of aluminum alloy, compared to the prior art which uses a bellows sleeve and a plastic housing 3, effectively avoids water ingress into the housing 3.

[0038] Example 3

[0039] This embodiment provides a mechanical handle structure. Based on the mechanical handle structure described in Embodiment 2, the clamping structure 4 is further improved. The clamping structure 4 includes a sleeve 4a, a second spring 4b, and a limiting plate 4e. The sleeve 4a is U-shaped, including two sides and a bottom surface, and is fitted onto the rotating shaft 2. The two ends of the limiting plate 4e are fixed to the housing 3. The screw 4c passes through the second spring 4b, the limiting plate 4e, and the two sides of the sleeve 4a in sequence, and is then tightened using the nut 4d. Adjusting the nut 4d allows the second spring 4b to have a certain preload. When the sleeve 4a loosens, the preload of the second spring 4b compensates for the loosening, causing the sleeve 4a to automatically clamp with the rotating shaft 2.

[0040] The mechanical handle structure, operating lever, sealing, clamping structure 4, centering positioning method, and housing 3 described in this application are all different from existing technologies. 1. Operating lever: The operating lever adopts a 90° bendable structure, effectively preventing accidental activation of the device. 2. Sealing: The operating lever passes through the housing 3 and connects to the rotating shaft 2, directly sealed by an oil seal and O-ring, effectively preventing dust and water from entering the housing 3. 3. Clamping structure 4: The rotating shaft 2 only passes through the support base 8 and housing 3 at its end. Existing technologies require it to first pass through the clamping sleeve 4a mounting base, then through the support base 8 and housing 3. In this embodiment, the clamping sleeve 4a does not require an additional mounting base. A limiting plate 4e is set parallel to the side of the clamping sleeve 4a, and the rotating shaft 2 does not pass through the limiting plate 4e. The structure of this embodiment is simpler. The U-shaped clamping sleeve 4a is clamped onto the rotating shaft 2, and the two sides of the clamping sleeve 4a are tightened by screws 4c and nuts 4d. Furthermore, the spring 4b is set to automatically compensate for the clamping force of the sleeve 4a. This application has an automatic compensation function and there are no contradictory installations. 4. Centering positioning method: Two roller fixing seats 6 are symmetrically arranged below the centering rotating plate 5. Two grooves adapted to the roller 7 are opened on the centering rotating plate 5. The two-point limiting is more stable and reliable than the single-point limiting of the prior art, effectively solving the technical problem of the operating rod swaying up, down and left and right when centering with the single-point limiting of the prior art. 5. Housing 3: The housing 3 includes housing 3a and housing 3b. The mechanical structure of the mechanical handle structure (including the rotating shaft 2, clamping structure 4, rotating plate, roller fixing seat 6, roller 7 and support seat 8) is set in housing 3a. The circuit board 9 of the electronic components is set in housing 3b. The circuit board is placed separately from other structures and is glued in housing 3b. The housing 3 is made of aluminum alloy.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the present utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of the present utility model.

Claims

1. A mechanical handle structure comprising an operating lever, a housing, and a rotating shaft, a clamping structure, a centering rotating plate, a roller shaft fixing seat, a roller shaft and a support seat installed in the housing; characterized in that, The return rotating plate and the roller fixing seat are both installed on the support seat; two roller fixing seats are symmetrically installed below the return rotating plate, and one roller is installed in each roller fixing seat; two grooves are formed in the return rotating plate and are adapted to the two rollers; when the operating rod drives the rotating shaft to rotate leftward and rightward, the rollers are compressed; when returning, the two rollers are extended from the roller fixing seats into the two grooves of the return rotating plate.

2. The mechanical handle structure of claim 1, wherein, One end of the roller fixing seat is fixed with the support seat, and the other end of the roller fixing seat is provided with a hole, in which a spring one, a roller and a spring block are sequentially arranged; when the return rotating plate rotates leftward and rightward, the roller compresses the spring one and enters the hole; when returning, the spring one is elongated to push the roller in the groove of the return rotating plate.

3. The mechanical handle structure of claim 1, wherein, The operating rod is connected with the rotating shaft through the shell, and a sealing ring is installed between the operating rod and the shell.

4. The mechanical handle structure of claim 1, wherein, The shell comprises a shell one and a shell two, the mechanical structure in the mechanical handle structure is located in the shell one, and the circuit board in the electronic element is located in the shell two, and the shell one and the shell two are spliced together; the circuit board is glued in the shell two.

5. The mechanical handle structure of claim 4, wherein, The outer circumferential surface of the shell one is provided with a protrusion, and the shell two is bonded or fixed with the protrusion.

6. The mechanical handle structure of claim 1, wherein, The clamping structure comprises a clamping sleeve and a fastener, the clamping sleeve is a U-shaped structure comprising two side surfaces and a bottom surface, the U-shaped clamping sleeve is sleeved on the rotating shaft, and the fastener passes through the two side surfaces to clamp the rotating shaft.

7. The mechanical handle structure of claim 6, wherein, The clamping structure further comprises a spring two, the fastener comprises a screw and a nut, the screw passes through the two side surfaces of the U-shaped clamping sleeve, and the other end is tightened with the nut; the spring two is located at one end of the screw; by tightening the nut, the compression amount of the spring two is adjusted, so that the spring has a pre-tightening force.

8. The mechanical handle structure of claim 7, wherein, The clamping structure further comprises a limiting plate, both ends of the limiting plate are fixed with the shell, the screw passes through the limiting plate, and the limiting plate is located between the spring two and the clamping sleeve.

9. The mechanical handle structure of claim 1, wherein, The operating rod adopts a foldable structure.

10. The mechanical handle structure of claim 9, wherein, The operating rod comprises a swing rod and an outer rod which are sequentially connected, the swing rod is connected with the rotating shaft, and the outer rod is foldable relative to the swing rod.

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