Automatic temperature control double-channel rubber pipe freezer

Abstract

The utility model relates to freezer technical field, the utility model provides an automatic temperature control double -channel rubber pipe freezer, it includes freezer, the side of freezer is provided with control panel, the side of freezer is provided with freezing pipe, the side fixedly connected with air guide channel of freezer, the side of air guide channel is provided with placing box, the top of placing box is provided with box cover, the side of air guide channel is provided with air power device. The side of air guide channel is provided with anti - blockage defrosting device, anti - blockage defrosting device includes transmission gear no. 1, transmission gear no. 1 fixedly connected in the circumference of double -output shaft motor output shaft. Through the above technical scheme, the technical problem that freezer refrigeration effect is not strong in the prior art, easy to block is solved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, specifically to an automatic temperature-controlled dual-channel hose refrigeration unit. Background Technology

[0002] In related technologies, traditional hose chillers typically suffer from problems such as insufficient cooling effect, inaccurate temperature control, and susceptibility to clogging. These problems are particularly pronounced when processing dual-channel hoses, impacting production efficiency and product quality.

[0003] According to a public disclosure (publication number: CN205818289U), an automatic temperature-controlled dual-channel hose chiller includes a chiller chamber, a first cooling channel, and a second cooling channel. Both the first and second cooling channels include a chiller, an inlet duct, a return duct, a control console, a temperature measuring device, and a flow valve. Both the first and second cooling channels are connected to the chiller chamber. The chiller is connected to the inlet duct via the flow valve. The inlet duct is connected to the air inlet of the chiller chamber and is equipped with a pre-filter. The return duct is connected to the return air inlet of the chiller chamber and is equipped with a post-filter. Two temperature measuring devices are installed inside the chiller chamber, one near the air inlet and the other near the return air inlet, and both are connected to the control console. These devices transmit the real-time temperatures of the air inlet and return air inlet inside the chiller chamber to the control console. The control console calculates the heat exchange efficiency based on these temperatures and controls the flow valve to control the flow rate of the cold air and the passage speed of the tube blank, thereby improving the cooling effect and efficiency while reducing energy consumption.

[0004] In the aforementioned application, the flow valve is dynamically adjusted via a control console based on real-time temperature information fed back by the temperature measuring device, thereby precisely controlling the flow rate of cold air and the speed at which the hose passes through the freezer chamber. Although this design improves cooling efficiency and effect to some extent, it suffers from complex structure and high maintenance costs. Therefore, we propose an automatic temperature-controlled dual-channel hose freezer. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides an automatic temperature-controlled dual-channel hose freezer, which solves the technical problems of weak refrigeration effect and easy blockage in the existing freezer.

[0006] According to one aspect, at least one embodiment of the present invention provides an automatic temperature-controlled dual-channel hose freezer, comprising: a freezer, a control panel provided on the side of the freezer, a freezing pipe provided on the side of the freezer, an air guide channel fixedly connected to the side of the freezer, a placement box provided on the side of the air guide channel, a box cover provided on the top of the placement box, and an aerodynamic device provided on the side of the air guide channel.

[0007] The aerodynamic device includes a mounting plate fixedly connected to the side of the placement box. A dual-output shaft motor is fixedly connected to the top of the mounting plate, and a driving bevel gear is fixedly connected to the output shaft of the dual-output shaft motor. A connecting plate is fixedly connected to the inner wall of the air guide channel. A rotating sleeve is fixedly connected through and to the side of the connecting plate. A rotating shaft is rotatably connected to the inner wall of the rotating sleeve. A fan blade is fixedly connected to one end of the rotating shaft, and a driven bevel gear is fixedly connected to the end of the rotating shaft away from the fan blade. An air guide shroud is provided on the side of the air guide channel, and an air inlet plate is fixedly connected to the top of the air guide shroud. An air outlet plate is fixedly connected to the side of the placement box.

[0008] For example, in at least one embodiment of this utility model, an automatic temperature-controlled dual-channel hose freezer further includes: a built-in diverter plate; the built-in diverter plate is fixedly connected to the inner wall of the air guide channel; and a filter plate is slidably connected through the side of the air guide shroud. Its function is to filter the air entering the air guide channel, preventing dust and other impurities from entering and affecting the normal operation of the equipment. Simultaneously, the built-in diverter plate can divert the passing air, improving airflow efficiency and allowing the air to flow more evenly through the storage box, thereby improving freezing efficiency.

[0009] The driving bevel gear and the driven bevel gear mesh with each other. The driving bevel gear has more teeth than the driven bevel gear. Its function is to achieve the effect of speed increase and torque reduction through the difference in the number of teeth, so that the fan blade can generate greater wind force, thereby improving the stability and efficiency of air flow.

[0010] The circumferential surface of the output shaft of the dual-output-shaft motor penetrates and rotatably connects to the side of the air guide channel. Two fan blades, a rotating shaft, and a driven bevel gear are provided, symmetrically distributed along the vertical central axis of the dual-output-shaft motor. Their function is to improve the uniformity and efficiency of airflow, ensuring a uniform temperature reduction within the placement chamber, thereby enhancing the freezing effect of the hose. The use of a dual-output-shaft motor enables simultaneous drive of two channels and two fan blades, simplifying the equipment structure and improving its operational stability and reliability.

[0011] The refrigeration pipe is located in front of the air guide shroud and behind the fan blades. The air guide channel runs through the interior of the placement box. Its function is to cool the air passing through the refrigeration pipe, allowing the cold air to flow through the placement box and freeze the rubber tubing placed inside. Simultaneously, the through-flow design of the air guide channel ensures smooth airflow and improves refrigeration efficiency.

[0012] The air guide channel is located below the air outlet plate. There are two air guide channels, whose function is to improve the efficiency and uniformity of airflow, ensuring that cold air can fully cover all corners of the placement box, thereby further improving the freezing effect of the hose. The two air guide channels enhance the dynamics of airflow.

[0013] According to another aspect, at least one embodiment of this utility model also provides an automatic temperature-controlled dual-channel hose freezer, comprising: an anti-clogging defrosting device, wherein the anti-clogging defrosting device is provided on the side of the air guide channel, the anti-clogging defrosting device includes a first transmission gear, the first transmission gear is fixedly connected to the circumferential surface of the output shaft of the dual-output-shaft motor, a connecting rod is slidably connected through and to the side of the air guide channel, a scraper is fixedly connected to one end of the connecting rod, a rack is fixedly connected to the end of the connecting rod away from the scraper, a reset plate is fixedly connected to the top of the rack, a reset spring is fixedly connected to the side of the reset plate, a rotating sleeve is fixedly connected to the side of the placement box, a force transmission shaft is rotatably connected to the inner wall of the rotating sleeve, a second transmission gear is fixedly connected to one end of the force transmission shaft, and a half gear is fixedly connected to the circumferential surface of the force transmission shaft, the function of which is to automatically defrost the built-in diverter plate, thereby ensuring the stable operation and efficient freezing effect of the automatic temperature-controlled dual-channel hose freezer.

[0014] For example, in at least one embodiment of the present invention, an automatic temperature-controlled dual-channel hose freezer is provided, which further includes: a return spring, the end of which is away from the return plate and is fixedly connected to the side of the air guide channel, and the circumferential surface of the connecting rod is slidably connected to the side of the air guide channel. Its function is to ensure the stable sliding of the connecting rod in the air guide channel, and at the same time, the return spring provides continuous return power for the scraper.

[0015] The side of the scraper is slidably connected to the side of the built-in diverter plate. The rack and half gear mesh with each other, and their function is to drive the scraper to scrape the side of the built-in diverter plate, effectively removing frost or impurities that may accumulate on the diverter plate, ensuring smooth airflow and stable freezing efficiency.

[0016] The first transmission gear and the second transmission gear mesh with each other. The number of teeth of the first transmission gear is slightly less than the number of teeth of the second transmission gear. The function of the difference in the number of teeth is to achieve the effect of speed reduction and torque increase, so that the second transmission gear can obtain a larger torque.

[0017] The beneficial effects of the embodiments of this utility model are as follows: 1. This utility model achieves efficient and stable aerodynamic output through the coordinated operation of components such as the mounting plate, dual-shaft motor, and active bevel gear in the aerodynamic device, thereby driving the fan blades to rotate and generating powerful airflow. This design not only improves the airflow speed and efficiency but also effectively enhances the freezing effect of cold air on the hose. Simultaneously, the built-in diverter further optimizes the airflow path, allowing air to flow more evenly through the placement box, avoiding localized excessively high or low temperatures, thus ensuring uniform freezing of the hose.

[0018] 2. In this utility model, the automatic cleaning function of the built-in flow divider plate is achieved through the cooperation of components such as the transmission gear one, connecting rod, and scraper in the anti-clogging scraping device. When the dual-output shaft motor is working, the transmission gear one rotates accordingly, and through meshing with the transmission gear two, it drives the rotation of the force transmission shaft and the half gear. The rotation of the half gear then drives the rack meshing with it to reciprocate, and the rack drives the scraper to scrape the side of the built-in flow divider plate through the connecting rod. This design effectively prevents the accumulation of frost or impurities on the flow divider plate, ensures smooth airflow, and thus maintains the efficient operation of the refrigeration unit. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional side view structural schematic diagram of the present invention; Figure 3 This is a three-dimensional partial structural schematic diagram of the present invention; Figure 4 This is a three-dimensional cross-sectional structural schematic diagram of the present invention; Figure 5 This is a three-dimensional enlarged structural schematic diagram of the anti-clogging and frosting device of this utility model.

[0021] In the diagram: 1. Refrigeration unit; 2. Control panel; 3. Refrigeration pipe; 4. Air duct; 5. Storage box; 6. Box cover; 7. Aerodynamic unit; 701. Mounting plate; 702. Dual-shaft motor; 703. Driven bevel gear; 704. Connecting plate; 705. Rotating sleeve; 706. Shaft; 707. Fan blade; 708. Driven bevel gear; 709. Air guide cover; 710. Air inlet plate; 711. Air outlet plate; 8. Built-in diverter plate; 9. Filter plate; 10. Anti-clogging scraper device; 101. Transmission gear one; 102. Connecting rod; 103. Scraper; 104. Rack; 105. Reset plate; 106. Reset spring; 107. Rotating sleeve; 108. Force transmission shaft; 109. Transmission gear two; 110. Half gear. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0023] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0024] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] like Figures 1-5 As shown, an automatic temperature-controlled dual-channel hose freezer according to an embodiment of the present invention is illustrated, including a freezer 1, a control panel 2 provided on the side of the freezer 1, a freezing pipe 3 provided on the side of the freezer 1, an air guide channel 4 fixedly connected to the side of the freezer 1, a placement box 5 provided on the side of the air guide channel 4, a box cover 6 provided on the top of the placement box 5, and an aerodynamic device 7 provided on the side of the air guide channel 4.

[0029] The aerodynamic device 7 includes a mounting plate 701, which is fixedly connected to the side of the placement box 5. A dual-output shaft motor 702 is fixedly connected to the top of the mounting plate 701. The output shaft of the dual-output shaft motor 702 is fixedly connected to a driving bevel gear 703. A connecting plate 704 is fixedly connected to the inner wall of the air guide channel 4. A rotating sleeve 705 is fixedly connected through the side of the connecting plate 704. A rotating shaft 706 is rotatably connected to the inner wall of the rotating sleeve 705. A fan blade 707 is fixedly connected to one end of the rotating shaft 706. A driven bevel gear 708 is fixedly connected to the end of the rotating shaft 706 away from the fan blade 707. An air guide shroud 709 is provided on the side of the air guide channel 4. An air inlet plate 710 is fixedly connected to the top of the air guide shroud 709. An air outlet plate 711 is fixedly connected to the side of the placement box 5.

[0030] In some examples, a built-in diverter plate 8 is fixedly connected to the inner wall of the air guide channel 4, and a filter plate 9 is slidably connected through the side of the air guide shroud 709. Its function is to filter the air entering the air guide channel 4, preventing dust and other impurities from entering and affecting the normal operation of the equipment. Simultaneously, the built-in diverter plate 8 can divert the passing air, improving airflow efficiency and allowing the air to flow more evenly through the placement box 5, thereby improving refrigeration efficiency.

[0031] The driving bevel gear 703 and the driven bevel gear 708 mesh with each other. The driving bevel gear 703 has more teeth than the driven bevel gear 708. Its function is to achieve the effect of speed increase and torque reduction through the difference in the number of teeth, so that the fan blade 707 can generate greater wind force, thereby improving the stability and efficiency of air flow.

[0032] The circumferential surface of the output shaft of the dual-output shaft motor 702 penetrates and rotatably connects to the side of the air guide channel 4. Two fan blades 707, a rotating shaft 706, and a driven bevel gear 708 are provided, symmetrically distributed along the vertical central axis of the dual-output shaft motor 702. Their function is to improve the uniformity and efficiency of airflow, ensuring that the temperature within the placement box 5 decreases uniformly, thereby improving the freezing effect of the hose. The use of the dual-output shaft motor 702 enables simultaneous drive of two channels and two fan blades 707, simplifying the equipment structure and improving its operational stability and reliability.

[0033] The refrigeration pipe 3 is located in front of the air guide shroud 709 and behind the fan blades 707. The air guide channel 4 runs through the interior of the placement box 5. Its function is to cool the air passing through it via the refrigeration pipe 3, allowing the cold air to flow through the placement box 5 and freeze the rubber hoses placed inside. At the same time, the through-flow design of the air guide channel 4 and the interior of the placement box 5 ensures smooth flow of cold air and improves refrigeration efficiency.

[0034] The air guide channel 4 is located below the air outlet plate 711. There are two air guide channels 4, which improve the efficiency and uniformity of airflow, ensuring that cold air can fully cover all corners inside the placement box 5, thereby further improving the freezing effect of the hose. The two air guide channels 4 enhance the power of airflow.

[0035] For example, such as Figures 1-5 As shown, the operator first places the hose into the placement box 5, then starts the dual-shaft motor 702 via the control panel 2. The output shaft of the dual-shaft motor 702 drives the active bevel gear 703 to rotate. The active bevel gear 703 meshes with the driven bevel gear 708, thereby driving the rotating shaft 706 and the fan blade 707 to rotate. The rotation of the fan blade 707 generates wind, drawing outside air into the air guide channel 4. The air is cooled as it passes through the freezing pipe 3, forming cold air. The cold air then enters the placement box 5 through the air guide channel 4 to freeze the hose placed inside. As the cold air flows within the placement box 5, it is divided by the built-in diverter plate 8, allowing the cold air to be distributed more evenly within the placement box 5, improving the uniformity and efficiency of freezing. At the same time, the filter plate 9 effectively prevents dust and other impurities from entering the air guide channel 4, ensuring the normal operation of the equipment and the freezing effect.

[0036] like Figures 1-5As shown, this is an automatic temperature-controlled dual-channel hose freezer according to another embodiment of the present invention. An anti-clogging scraping device 10 is provided on the side of the air guide channel 4. The anti-clogging scraping device 10 includes a transmission gear 101, which is fixedly connected to the circumferential surface of the output shaft of the dual-output shaft motor 702. A connecting rod 102 is slidably connected through and to the side of the air guide channel 4. One end of the connecting rod 102 is fixedly connected to a scraper 103, and the end of the connecting rod 102 away from the scraper 103 is fixedly connected to a rack 104. A reset plate 105 is fixedly connected to the top of the rack 104, and a reset spring 106 is fixedly connected to the side of the reset plate 105. A rotating sleeve 107 is fixedly connected to the side of the placement box 5. A force transmission shaft 108 is rotatably connected to the inner wall of the rotating sleeve 107. A transmission gear 109 is fixedly connected to one end of the force transmission shaft 108, and a half gear 110 is fixedly connected to the circumferential surface of the force transmission shaft 108. Its function is to automatically scrape the frost from the built-in diverter plate 8, ensuring the stable operation and efficient freezing effect of the automatic temperature-controlled dual-channel hose freezer.

[0037] In some examples, the end of the return spring 106 away from the return plate 105 is fixedly connected to the side of the air guide channel 4, and the circumferential surface of the connecting rod 102 is slidably connected to the side of the air guide channel 4. Its function is to ensure the stable sliding of the connecting rod 102 in the air guide channel 4, while the return spring 106 provides continuous return power for the scraper 103.

[0038] The side of the scraper 103 is slidably connected to the side of the built-in diverter plate 8. The rack 104 and the half gear 110 mesh with each other. Their function is to drive the scraper 103 to scrape the side of the built-in diverter plate 8, effectively removing frost or impurities that may accumulate on the diverter plate, ensuring smooth airflow and stable freezing efficiency.

[0039] Transmission gear 101 meshes with transmission gear 109. The number of teeth of transmission gear 101 is slightly less than that of transmission gear 109. The function of this difference in the number of teeth is to achieve the effect of speed reduction and torque increase, so that transmission gear 109 can obtain a larger torque.

[0040] For example, such as 1~ Figure 5As shown, while the dual-output shaft motor 702 is running, transmission gear 101 rotates along with its output shaft. Since transmission gear 101 meshes with transmission gear 2 109, and transmission gear 101 has slightly fewer teeth than transmission gear 2 109, transmission gear 2 109 rotates at a slower speed but generates greater torque. This speed reduction and torque increase effect ensures that the transmission shaft 108 and its half-gear 110 can work stably and effectively. As transmission gear 2 109 rotates, half-gear 110 meshes with rack 104. Since rack 104 is fixedly connected to connecting rod 102, and connecting rod 102 is slidably connected to the built-in diverter plate 8 via scraper 103, the rotation of half-gear 110 causes rack 104 and connecting rod 102 to slide along the side of air guide channel 4. This sliding action causes scraper 103 to scrape the side of the built-in diverter plate 8, effectively removing any frost or impurities that may accumulate.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automatic temperature-controlled dual-channel hose freezer, characterized in that, include: A freezer (1) is provided with a control panel (2) on the side of the freezer (1), a freezing pipe (3) is provided on the side of the freezer (1), an air guide channel (4) is fixedly connected to the side of the freezer (1), a placement box (5) is provided on the side of the air guide channel (4), a box cover (6) is provided on the top of the placement box (5), and an aerodynamic device (7) is provided on the side of the air guide channel (4). The aerodynamic device (7) includes a mounting plate (701), which is fixedly connected to the side of the placement box (5). A dual-output shaft motor (702) is fixedly connected to the top of the mounting plate (701). The output shaft of the dual-output shaft motor (702) is fixedly connected to a drive bevel gear (703). A connecting plate (704) is fixedly connected to the inner wall of the air guide channel (4). A rotating sleeve (705) is fixedly connected through the side of the connecting plate (704). The inner wall of the rotating sleeve (705) is rotatably connected to a rotating shaft (706), one end of the rotating shaft (706) is fixedly connected to a fan blade (707), the end of the rotating shaft (706) away from the fan blade (707) is fixedly connected to a driven bevel gear (708), the side of the air guide channel (4) is provided with an air guide cover (709), the top of the air guide cover (709) is fixedly connected to an air inlet plate (710), and the side of the placement box (5) is fixedly connected to an air outlet plate (711).

2. The automatic temperature-controlled dual-channel hose chiller according to claim 1, characterized in that, The inner wall of the air guide channel (4) is fixedly connected to a built-in diverter plate (8), and the side of the air guide hood (709) is slidably connected to a filter plate (9).

3. The automatic temperature-controlled dual-channel hose chiller according to claim 2, characterized in that, The driving bevel gear (703) meshes with the driven bevel gear (708), and the driving bevel gear (703) has more teeth than the driven bevel gear (708).

4. An automatic temperature-controlled dual-channel hose chiller according to claim 3, characterized in that, The circumferential surface of the output shaft of the dual-output shaft motor (702) passes through and is rotatably connected to the side of the air guide channel (4). The number of the fan blade (707), the rotating shaft (706) and the driven bevel gear (708) is two, and they are symmetrically distributed along the vertical central axis of the dual-output shaft motor (702).

5. An automatic temperature-controlled dual-channel hose chiller according to claim 4, characterized in that, The refrigeration tube (3) is located in front of the air guide shroud (709) and behind the fan blade (707). The air guide channel (4) penetrates the interior of the placement box (5).

6. An automatic temperature-controlled dual-channel hose chiller according to claim 5, characterized in that, The air guide channel (4) is located below the air outlet plate (711), and there are two air guide channels (4).

7. An automatic temperature-controlled dual-channel hose freezer according to claim 6, characterized in that, A clogging-resistant scraping device (10) is provided on the side of the air guide channel (4). The clogging-resistant scraping device (10) includes a transmission gear (101), which is fixedly connected to the circumferential surface of the output shaft of the dual-output shaft motor (702). A connecting rod (102) is slidably connected through the side of the air guide channel (4). A scraper (103) is fixedly connected to one end of the connecting rod (102), and a scraper (103) is fixedly connected to the other end of the connecting rod (102) away from the scraper (103). A rack (104) is fixedly connected to a reset plate (105) at its top. A reset spring (106) is fixedly connected to the side of the reset plate (105). A rotating sleeve (107) is fixedly connected to the side of the placement box (5). A force transmission shaft (108) is rotatably connected to the inner wall of the rotating sleeve (107). A transmission gear (109) is fixedly connected to one end of the force transmission shaft (108). A half gear (110) is fixedly connected to the circumferential surface of the force transmission shaft (108).

8. An automatic temperature-controlled dual-channel hose chiller according to claim 7, characterized in that, The end of the reset spring (106) away from the reset plate (105) is fixedly connected to the side of the air guide channel (4), and the circumferential surface of the connecting rod (102) is slidably connected to the side of the air guide channel (4).

9. An automatic temperature-controlled dual-channel hose chiller according to claim 8, characterized in that, The side of the scraper (103) is slidably connected to the side of the built-in diverter plate (8), and the rack (104) meshes with the half gear (110).

10. An automatic temperature-controlled dual-channel hose chiller according to claim 9, characterized in that, The first transmission gear (101) meshes with the second transmission gear (109), and the number of teeth of the first transmission gear (101) is slightly less than the number of teeth of the second transmission gear (109).

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